/* ========================================
   스마트홈연구소 - 블랙 테마 스타일시트
   ======================================== */

/* Reset & Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Dark Colors */
    --bg-primary: #0a0a0a;
    --bg-secondary: #121212;
    --bg-card: #1a1a1a;
    --bg-elevated: #202020;

    /* Text Colors */
    --text-primary: #ffffff;
    --text-secondary: #b3b3b3;
    --text-tertiary: #808080;

    /* Accent Colors - Vibrant Lighting */
    --accent-blue: #4285f4;
    --accent-cyan: #00d9ff;
    --accent-purple: #a855f7;
    --accent-pink: #ec4899;
    --accent-orange: #ff6b35;
    --accent-green: #10b981;

    /* Glow Effects */
    --glow-blue: 0 0 20px rgba(66, 133, 244, 0.5);
    --glow-cyan: 0 0 20px rgba(0, 217, 255, 0.5);
    --glow-purple: 0 0 20px rgba(168, 85, 247, 0.5);
    --glow-pink: 0 0 20px rgba(236, 72, 153, 0.5);

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;

    /* Transitions */
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* ========================================
   Typography
   ======================================== */

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

.gradient-text {
    color: var(--accent-cyan);
    text-shadow:
        0 0 15px rgba(0, 217, 255, 0.3),
        0 4px 20px rgba(0, 0, 0, 0.8);
    display: inline-block;
    font-weight: 800;
}

.section-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    margin-bottom: var(--spacing-md);
    text-align: center;
}

.section-subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--text-secondary);
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.section-header {
    margin-bottom: var(--spacing-2xl);
}

/* ========================================
   Buttons
   ======================================== */

.btn-primary,
.btn-secondary,
.btn-outline,
.nav-cta {
    padding: 0.875rem 2rem;
    border-radius: var(--radius-xl);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
    color: var(--text-primary);
    box-shadow: var(--glow-blue);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 30px rgba(66, 133, 244, 0.6);
}

.btn-primary.glow-effect {
    animation: pulse 2s ease-in-out infinite;
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 2px solid rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.4);
}

.btn-outline {
    background: transparent;
    color: var(--accent-cyan);
    border: 2px solid var(--accent-cyan);
}

.btn-outline:hover {
    background: var(--accent-cyan);
    color: var(--bg-primary);
    box-shadow: var(--glow-cyan);
}

.full-width {
    width: 100%;
    margin-top: var(--spacing-sm);
}

/* ========================================
   Navigation
   ======================================== */

.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(10, 10, 10, 0.8);
    backdrop-filter: blur(20px);
    z-index: 1000;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    transition: all var(--transition-base);
}

.navbar::after {
    content: '';
    position: absolute;
    bottom: -120px;
    left: 0;
    width: 100%;
    height: 120px;
    background: radial-gradient(ellipse 2000px 120px at center top,
        rgba(255, 180, 100, 0) 0%,
        rgba(255, 180, 100, 0) 100%);
    opacity: 0;
    transition: opacity 1.2s ease, background 0.8s ease;
    pointer-events: none;
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    text-decoration: none;
}

.logo a {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    text-decoration: none;
}

.logo-img {
    height: 60px;
    width: 60px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid rgba(255, 255, 255, 0.1);
}

.logo-text {
    font-size: 1.4rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
}

.logo-divider {
    font-size: 1.2rem;
    font-weight: 700;
    color: rgba(255, 255, 255, 0.3);
    margin: 0 0.5rem;
}

.logo-eng {
    font-size: 0.9rem;
    font-weight: 600;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: 0.1em;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
    align-items: center;
}

.nav-menu a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition-fast);
    position: relative;
    padding-bottom: 0.5rem;
}

.nav-menu a:hover {
    color: var(--text-primary);
}

.navbar:has(.nav-menu a:hover)::after {
    opacity: 1;
    background: radial-gradient(ellipse 2000px 120px at center top,
        rgba(255, 180, 100, 0.3) 0%,
        rgba(255, 160, 80, 0.2) 15%,
        rgba(255, 140, 60, 0.12) 30%,
        rgba(255, 120, 40, 0.06) 50%,
        rgba(255, 100, 20, 0.02) 70%,
        transparent 100%);
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-cyan), var(--accent-blue));
    border-radius: 3px 3px 0 0;
    box-shadow:
        0 0 10px rgba(0, 217, 255, 0.6),
        0 0 20px rgba(0, 217, 255, 0.4),
        0 4px 15px rgba(0, 217, 255, 0.3);
    transition: width var(--transition-base), box-shadow var(--transition-base);
}

.nav-menu a:hover::after {
    width: 100%;
    box-shadow:
        0 0 15px rgba(0, 217, 255, 0.8),
        0 0 30px rgba(0, 217, 255, 0.6),
        0 8px 25px rgba(0, 217, 255, 0.5);
}

.nav-cta {
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    color: white;
}

.nav-cta:hover {
    transform: translateY(-2px);
    box-shadow: var(--glow-blue);
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.hamburger span {
    width: 25px;
    height: 2px;
    background: var(--text-primary);
    transition: all var(--transition-base);
}


/* ========================================
   Hero Section
   ======================================== */

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    padding: 0;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 20% 50%, rgba(0, 217, 255, 0.08) 0%, transparent 50%);
    z-index: 0;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
    align-items: center;
    position: relative;
    z-index: 1;
    width: 100%;
    height: 100vh;
    max-width: 1400px;
    padding: 0 var(--spacing-lg);
    margin: 0 auto;
}

.hero-title {
    font-size: clamp(3rem, 7vw, 5rem);
    margin-bottom: var(--spacing-lg);
    animation: fadeInUp 0.8s ease;
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.8);
    font-weight: 700;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: clamp(1.2rem, 2.5vw, 1.6rem);
    color: #e8e8e8;
    margin-bottom: var(--spacing-xl);
    animation: fadeInUp 0.8s ease 0.2s both;
    text-shadow: 0 2px 12px rgba(0, 0, 0, 0.8);
    font-weight: 400;
    line-height: 1.6;
}

.hero-content {
    text-align: left;
    max-width: 600px;
}

.hero-image {
    width: 100%;
    height: 700px;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow:
        0 20px 60px rgba(0, 0, 0, 0.5),
        0 0 40px rgba(0, 217, 255, 0.2);
    animation: fadeInRight 1s ease 0.3s both;
}

.hero-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-md);
    animation: fadeInUp 0.8s ease 0.4s both;
    flex-wrap: wrap;
    justify-content: flex-start;
}

/* ========================================
   About Section
   ======================================== */

.about-section {
    padding: var(--spacing-2xl) 0;
    background: var(--bg-secondary);
}

.about-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-2xl);
}

.about-card {
    background: var(--bg-card);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.05);
    text-align: center;
    transition: all var(--transition-base);
}

.about-card.highlight {
    background: linear-gradient(135deg, rgba(0, 217, 255, 0.1), rgba(66, 133, 244, 0.1));
    border-color: rgba(0, 217, 255, 0.3);
}

.about-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 40px rgba(0, 217, 255, 0.2);
    border-color: rgba(0, 217, 255, 0.4);
}

.about-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-md);
}

.about-card h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.about-card p {
    color: var(--text-secondary);
    line-height: 1.8;
}

.philosophy-statement {
    text-align: center;
    padding: var(--spacing-2xl);
    background: linear-gradient(135deg, rgba(0, 217, 255, 0.05), rgba(168, 85, 247, 0.05));
    border-radius: var(--radius-lg);
    border: 1px solid rgba(0, 217, 255, 0.2);
}

.philosophy-statement blockquote {
    font-size: clamp(1.2rem, 2.5vw, 1.8rem);
    font-weight: 300;
    color: var(--text-primary);
    font-style: italic;
    line-height: 1.6;
    margin: 0;
}

/* ========================================
   Products Section
   ======================================== */

.products-section {
    padding: var(--spacing-2xl) 0;
    background: var(--bg-primary);
}

.product-categories {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-xl);
}

.category-card {
    background: var(--bg-card);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: all var(--transition-base);
}

.category-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 40px rgba(66, 133, 244, 0.2);
    border-color: rgba(66, 133, 244, 0.3);
}

.category-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.category-icon {
    font-size: 3rem;
}

.category-header h3 {
    font-size: 1.8rem;
    color: var(--text-primary);
}

.product-list-items {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.product-list-items li {
    padding: var(--spacing-md);
    background: rgba(255, 255, 255, 0.02);
    border-radius: var(--radius-sm);
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    transition: all var(--transition-base);
}

.product-list-items li:hover {
    background: rgba(0, 217, 255, 0.05);
    transform: translateX(8px);
}

.product-list-items strong {
    color: var(--text-primary);
    font-size: 1.1rem;
}

.product-list-items span {
    color: var(--text-tertiary);
    font-size: 0.9rem;
}

/* ========================================
   Experience Section
   ======================================== */

.experience-section {
    padding: var(--spacing-2xl) 0;
    background: var(--bg-secondary);
}

.emotional-copy {
    margin: var(--spacing-xl) 0;
    padding: var(--spacing-xl);
    background: linear-gradient(135deg, rgba(0, 217, 255, 0.1), rgba(168, 85, 247, 0.1));
    border-radius: var(--radius-lg);
    border-left: 4px solid var(--accent-cyan);
}

.emotional-copy h3 {
    font-size: clamp(1.3rem, 3vw, 2rem);
    font-weight: 400;
    font-style: italic;
    color: var(--accent-cyan);
    text-shadow: 0 0 20px rgba(0, 217, 255, 0.5);
    line-height: 1.6;
    margin: 0;
}

.room-selector {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
    justify-content: center;
    flex-wrap: wrap;
}

.room-btn {
    padding: 0.75rem 2rem;
    background: var(--bg-card);
    border: 2px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-xl);
    color: var(--text-secondary);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
}

.room-btn:hover {
    background: var(--bg-elevated);
    border-color: rgba(255, 255, 255, 0.2);
    color: var(--text-primary);
}

.room-btn.active {
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
    border-color: transparent;
    color: white;
    box-shadow: var(--glow-blue);
}

.interactive-viewer {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--spacing-xl);
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.room-display {
    position: relative;
    width: 100%;
    height: 600px;
    border-radius: var(--radius-md);
    overflow: hidden;
    background: #000;
}

.room-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: all var(--transition-slow);
}

.light-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.3) 0%, transparent 70%);
    opacity: 0;
    mix-blend-mode: overlay;
    transition: opacity var(--transition-slow);
    pointer-events: none;
}

/* Control Panel */
.control-panel {
    background: var(--bg-elevated);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.control-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.control-header h3 {
    font-size: 1.25rem;
}

/* Power Switch */
.power-switch {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.toggle-input {
    display: none;
}

.toggle-label {
    width: 60px;
    height: 32px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 32px;
    position: relative;
    cursor: pointer;
    transition: all var(--transition-base);
}

.toggle-button {
    position: absolute;
    top: 4px;
    left: 4px;
    width: 24px;
    height: 24px;
    background: white;
    border-radius: 50%;
    transition: all var(--transition-base);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.toggle-input:checked + .toggle-label {
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
    box-shadow: var(--glow-blue);
}

.toggle-input:checked + .toggle-label .toggle-button {
    left: 32px;
}

.power-text {
    font-weight: 600;
    color: var(--text-secondary);
}

.toggle-input:checked ~ .power-text {
    color: var(--accent-cyan);
}

/* Control Group */
.control-group {
    margin-bottom: var(--spacing-lg);
}

.control-label {
    display: flex;
    justify-content: space-between;
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
    color: var(--text-secondary);
}

.value-display {
    color: var(--accent-cyan);
}

/* Slider */
.slider {
    width: 100%;
    height: 6px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 6px;
    outline: none;
    -webkit-appearance: none;
}

.slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
    border-radius: 50%;
    cursor: pointer;
    box-shadow: var(--glow-blue);
    transition: all var(--transition-base);
}

.slider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

.slider::-moz-range-thumb {
    width: 20px;
    height: 20px;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
    border-radius: 50%;
    cursor: pointer;
    border: none;
    box-shadow: var(--glow-blue);
}

/* Color Picker */
.color-picker {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-sm);
}

.color-btn {
    width: 100%;
    aspect-ratio: 1;
    border-radius: var(--radius-sm);
    border: 2px solid transparent;
    cursor: pointer;
    transition: all var(--transition-base);
    position: relative;
}

.color-btn:hover {
    transform: scale(1.1);
    border-color: white;
}

.color-btn.active {
    border-color: white;
    box-shadow: 0 0 20px currentColor;
}

.color-btn.active::after {
    content: '✓';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: white;
    font-weight: bold;
    text-shadow: 0 0 4px rgba(0, 0, 0, 0.5);
}

/* Preset Scenes */
.preset-scenes {
    margin-top: var(--spacing-xl);
}

.preset-scenes h4 {
    margin-bottom: var(--spacing-md);
    color: var(--text-secondary);
}

.scene-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-sm);
}

.scene-btn {
    padding: var(--spacing-md);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.9rem;
    cursor: pointer;
    transition: all var(--transition-base);
}

.scene-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--accent-cyan);
    transform: translateY(-2px);
}

/* ========================================
   Examples Section
   ======================================== */

.examples-section {
    padding: var(--spacing-2xl) 0;
}

.examples-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
}

.example-card {
    background: var(--bg-card);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.05);
    text-align: center;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.example-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(66, 133, 244, 0.05), rgba(168, 85, 247, 0.05));
    opacity: 0;
    transition: opacity var(--transition-base);
}

.example-card:hover {
    transform: translateY(-8px);
    border-color: rgba(66, 133, 244, 0.3);
    box-shadow: 0 8px 32px rgba(66, 133, 244, 0.2);
}

.example-card:hover::before {
    opacity: 1;
}

.example-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-md);
    filter: grayscale(0.3);
}

.example-card h3 {
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.example-card p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    line-height: 1.7;
}

/* ========================================
   Quote Section
   ======================================== */

.quote-section {
    padding: var(--spacing-2xl) 0;
    background: var(--bg-secondary);
}

.quote-calculator {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
}

.quote-form {
    background: var(--bg-card);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
    color: var(--text-secondary);
}

.form-select,
.form-input {
    width: 100%;
    padding: var(--spacing-md);
    background: var(--bg-elevated);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 1rem;
    transition: all var(--transition-base);
}

.form-select:focus,
.form-input:focus {
    outline: none;
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 3px rgba(66, 133, 244, 0.1);
}

.product-selector {
    margin-top: var(--spacing-xl);
}

.product-selector h4 {
    margin-bottom: var(--spacing-md);
    color: var(--text-secondary);
}

.product-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.product-item {
    display: grid;
    grid-template-columns: auto 1fr auto;
    gap: var(--spacing-md);
    align-items: center;
    padding: var(--spacing-md);
    background: var(--bg-elevated);
    border-radius: var(--radius-sm);
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: all var(--transition-base);
}

.product-item:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.1);
}

.product-check {
    width: 20px;
    height: 20px;
    cursor: pointer;
}

.product-item label {
    display: flex;
    justify-content: space-between;
    cursor: pointer;
    flex: 1;
}

.product-name {
    color: var(--text-primary);
    font-weight: 500;
}

.product-price {
    color: var(--accent-cyan);
    font-weight: 600;
}

.quantity-input {
    width: 80px;
    padding: 0.5rem;
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    text-align: center;
}

/* Quote Summary */
.quote-summary {
    background: var(--bg-card);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.05);
    position: sticky;
    top: 100px;
}

.quote-summary h3 {
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.summary-items {
    margin-bottom: var(--spacing-lg);
    min-height: 200px;
}

.empty-state {
    color: var(--text-tertiary);
    text-align: center;
    padding: var(--spacing-xl) 0;
}

.summary-total {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--spacing-md);
}

.total-row {
    display: flex;
    justify-content: space-between;
    margin-bottom: var(--spacing-sm);
    color: var(--text-secondary);
}

.total-row.grand-total {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 2px solid rgba(255, 255, 255, 0.1);
}

.total-row.grand-total span:last-child {
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* ========================================
   Shop Section
   ======================================== */

.shop-section {
    padding: var(--spacing-2xl) 0;
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
}

/* 태블릿에서도 3열 유지, 간격만 축소 */
@media (max-width: 1024px) {
    .product-grid {
        gap: var(--spacing-md);
    }
}

.product-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: all var(--transition-base);
}

.product-card:hover {
    transform: translateY(-8px);
    border-color: rgba(66, 133, 244, 0.3);
    box-shadow: 0 8px 32px rgba(66, 133, 244, 0.2);
}

.product-image {
    position: relative;
    height: 250px;
    overflow: hidden;
}

.product-badge {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    padding: 0.5rem 1rem;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
    border-radius: var(--radius-xl);
    font-size: 0.85rem;
    font-weight: 600;
    z-index: 1;
    box-shadow: var(--glow-blue);
}

.product-badge.new {
    background: linear-gradient(135deg, var(--accent-pink), var(--accent-orange));
    box-shadow: var(--glow-pink);
}

.placeholder-product {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #1a1a1a, #2a2a2a);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-tertiary);
    font-weight: 600;
}

.product-info {
    padding: var(--spacing-lg);
}

.product-info h3 {
    margin-bottom: var(--spacing-sm);
    font-size: 1.1rem;
}

.product-desc {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
}

.product-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.price {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.btn-cart {
    padding: 0.75rem 1.5rem;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    border: none;
    border-radius: var(--radius-md);
    color: white;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
}

.btn-cart:hover {
    transform: translateY(-2px);
    box-shadow: var(--glow-blue);
}

/* ========================================
   Footer
   ======================================== */

.footer {
    background: var(--bg-secondary);
    padding: var(--spacing-2xl) 0 var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-col h4 {
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.footer-col ul {
    list-style: none;
}

.footer-col ul li {
    margin-bottom: var(--spacing-sm);
}

.footer-col a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer-col a:hover {
    color: var(--accent-cyan);
}

.footer-col p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
}

.footer-logo {
    height: 80px;
    width: 80px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid rgba(255, 255, 255, 0.1);
    margin-bottom: var(--spacing-md);
}

.footer-desc {
    color: var(--text-secondary);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    color: var(--text-tertiary);
}

/* ========================================
   Animations
   ======================================== */

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-20px);
    }
}

@keyframes pulse {
    0%, 100% {
        box-shadow: 0 0 20px rgba(66, 133, 244, 0.5);
    }
    50% {
        box-shadow: 0 0 40px rgba(66, 133, 244, 0.8);
    }
}

@keyframes shimmer {
    0% {
        left: -100%;
    }
    100% {
        left: 100%;
    }
}

@keyframes gradientShift {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.8;
    }
}

/* ========================================
   Responsive Design
   ======================================== */

@media (max-width: 1024px) {
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-content {
        text-align: center;
    }

    .hero-buttons {
        justify-content: center;
    }

    .hero-image {
        height: 500px;
    }

    .interactive-viewer {
        grid-template-columns: 1fr;
    }

    .quote-calculator {
        grid-template-columns: 1fr;
    }

    .quote-summary {
        position: static;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 var(--spacing-md);
    }

    .nav-menu {
        position: fixed;
        display: flex;
        top: 80px;
        left: -280px;
        width: 280px;
        height: calc(100vh - 80px);
        background: rgba(10, 10, 10, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        align-items: flex-start;
        padding: var(--spacing-xl);
        transition: left 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        z-index: 999;
        border-top: 1px solid rgba(255, 255, 255, 0.1);
        border-right: 1px solid rgba(255, 255, 255, 0.1);
        gap: 0;
        box-shadow: 4px 0 20px rgba(0, 0, 0, 0.5);
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-menu li {
        width: 100%;
        margin-bottom: 0;
    }

    .nav-menu a {
        display: block;
        width: 100%;
        padding: var(--spacing-md);
        font-size: 1.2rem;
        border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        position: relative;
    }

    /* 모바일에서 활성 메뉴 항목 스타일 */
    .nav-menu a.active {
        color: var(--text-primary);
    }

    .nav-cta {
        display: none;
    }

    .hamburger {
        display: flex;
    }

    .logo-img {
        height: 50px;
        width: 50px;
    }

    .logo-text {
        font-size: 1.2rem;
    }

    .hero {
        min-height: auto;
        padding: calc(80px + var(--spacing-lg)) 0 var(--spacing-xl) 0;
    }

    .hero .container {
        height: auto;
        padding: 0 var(--spacing-md);
    }

    .hero-image {
        height: 300px;
    }

    .hero-title {
        font-size: clamp(2rem, 8vw, 3rem);
    }

    .hero-subtitle {
        font-size: clamp(1rem, 4vw, 1.3rem);
    }

    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }

    .hero-buttons a {
        width: 100%;
        text-align: center;
    }

    .btn-primary,
    .btn-secondary,
    .btn-outline {
        padding: 0.75rem 1.5rem;
        font-size: 0.95rem;
    }

    .features-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .feature-card {
        padding: var(--spacing-lg);
    }

    .room-selector {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-sm);
    }

    .room-btn {
        padding: 0.6rem 1rem;
        font-size: 0.9rem;
    }

    .room-display {
        height: 400px;
    }

    .examples-grid {
        grid-template-columns: 1fr;
    }

    .product-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--spacing-sm);
    }

    .product-card {
        font-size: 0.8rem;
    }

    .product-image {
        height: 150px;
    }

    .product-info {
        padding: var(--spacing-sm);
    }

    .product-info h3 {
        font-size: 0.9rem;
        line-height: 1.3;
    }

    .product-desc {
        font-size: 0.75rem;
        line-height: 1.3;
    }

    .product-specs-mini {
        font-size: 0.7rem;
        gap: 0.3rem;
    }

    .product-price {
        font-size: 1rem;
    }

    .btn-add-cart {
        padding: 0.6rem;
        font-size: 0.85rem;
    }

    .product-categories {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .stat-number {
        font-size: clamp(2rem, 8vw, 3rem);
    }

    .quick-access-grid {
        grid-template-columns: 1fr;
    }

    .story-grid {
        grid-template-columns: 1fr;
    }

    .product-detail-grid {
        grid-template-columns: 1fr;
    }

    .portfolio-grid {
        grid-template-columns: 1fr;
    }

    .cta-buttons {
        flex-direction: column;
        width: 100%;
    }

    .cta-buttons a {
        width: 100%;
    }

    .section-title {
        font-size: clamp(1.8rem, 6vw, 2.5rem);
    }

    .page-title {
        font-size: clamp(2rem, 7vw, 3rem);
    }
}

/* 아주 작은 모바일 (480px 이하) - 3열 유지, 더 축소 */
@media (max-width: 480px) {
    .product-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 0.5rem;
    }

    .product-card {
        font-size: 0.7rem;
        border-radius: 8px;
    }

    .product-image {
        height: 120px;
    }

    .product-badge {
        font-size: 0.65rem;
        padding: 0.3rem 0.5rem;
    }

    .product-info {
        padding: 0.5rem;
    }

    .product-info h3 {
        font-size: 0.75rem;
        line-height: 1.2;
        margin-bottom: 0.3rem;
    }

    .product-desc {
        font-size: 0.65rem;
        line-height: 1.2;
        margin-bottom: 0.3rem;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }

    .product-specs-mini {
        font-size: 0.6rem;
        gap: 0.2rem;
        flex-wrap: wrap;
    }

    .product-footer {
        padding-top: 0.5rem;
    }

    .product-price {
        font-size: 0.9rem;
    }

    .btn-add-cart {
        padding: 0.5rem 0.3rem;
        font-size: 0.7rem;
    }

    .shop-filter-section {
        padding: 1rem 0;
    }

    .filter-controls {
        gap: 0.5rem;
    }

    .filter-group {
        font-size: 0.85rem;
    }

    .filter-select {
        font-size: 0.8rem;
        padding: 0.4rem;
    }
}

/* Extra small devices */
@media (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }

    .logo-text {
        font-size: 1rem;
    }

    .hero-image {
        height: 250px;
    }

    .room-selector {
        grid-template-columns: 1fr;
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }

    .filter-buttons {
        flex-direction: column;
        width: 100%;
    }

    .filter-btn {
        width: 100%;
    }

    .modal-content {
        width: 95%;
        max-height: 95vh;
    }

    .modal-body {
        padding: var(--spacing-lg);
    }
}

/* ========================================
   CTA Section
   ======================================== */

.cta-section {
    padding: var(--spacing-2xl) 0;
    background: var(--bg-card);
    text-align: center;
    position: relative;
    z-index: 1;
}

.cta-section h2 {
    font-size: clamp(1.8rem, 4vw, 2.5rem);
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.cta-section p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: var(--spacing-xl);
}

.cta-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* ========================================
   Utility Classes
   ======================================== */

.text-center {
    text-align: center;
}

.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }
.mt-4 { margin-top: var(--spacing-xl); }

.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }
.mb-4 { margin-bottom: var(--spacing-xl); }

/* ========================================
   Page Hero (for sub-pages)
   ======================================== */

.page-hero {
    padding: calc(80px + var(--spacing-2xl)) 0 var(--spacing-2xl) 0;
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
    text-align: center;
}

.page-title {
    font-size: clamp(2.5rem, 6vw, 4rem);
    margin-bottom: var(--spacing-md);
}

.page-subtitle {
    font-size: clamp(1rem, 2vw, 1.3rem);
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto;
}

/* About Page Hero with Slogan */
.about-hero {
    padding: calc(80px + var(--spacing-2xl)) 0 var(--spacing-2xl) 0;
}

.slogan-section {
    margin-top: var(--spacing-xl);
}

.main-slogan {
    font-size: clamp(1.5rem, 4vw, 2.5rem);
    color: var(--accent-cyan);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    line-height: 1.4;
}

.slogan-desc {
    font-size: clamp(1rem, 2vw, 1.2rem);
    color: var(--text-secondary);
    line-height: 1.8;
    max-width: 800px;
    margin: 0 auto;
}

/* Company Story Section */
.company-story-section {
    padding: var(--spacing-2xl) 0;
    background: var(--bg-primary);
}

.story-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
    align-items: center;
    margin-top: var(--spacing-xl);
}

.story-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.story-text {
    color: var(--text-secondary);
    line-height: 1.8;
    font-size: 1.1rem;
}

.story-image img {
    width: 100%;
    border-radius: var(--radius-lg);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

/* Awards Section */
.awards-section {
    padding: var(--spacing-2xl) 0;
    background: var(--bg-secondary);
}

.awards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
}

.award-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: all var(--transition-base);
}

.award-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent-cyan);
    box-shadow: 0 10px 30px rgba(0, 217, 255, 0.1);
}

.award-image {
    width: 100%;
    height: 300px;
    overflow: hidden;
    background: var(--bg-elevated);
}

.award-image img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    padding: var(--spacing-md);
}

.award-info {
    padding: var(--spacing-lg);
}

.award-info h3 {
    color: var(--accent-cyan);
    margin-bottom: var(--spacing-sm);
    font-size: 1.2rem;
}

.award-desc {
    color: var(--text-secondary);
    line-height: 1.6;
    font-size: 0.95rem;
}

/* Partners Section */
.partners-section {
    padding: var(--spacing-2xl) 0;
    background: var(--bg-primary);
}

.partners-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.partner-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: all var(--transition-base);
}

.partner-card:hover {
    border-color: var(--accent-cyan);
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 217, 255, 0.1);
}

.partner-logo-placeholder {
    width: 100%;
    height: 120px;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-lg);
}

.partner-logo-placeholder h3 {
    color: var(--text-tertiary);
    font-size: 1.5rem;
}

.partner-info h4 {
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
    font-size: 1.2rem;
}

.partner-category {
    color: var(--accent-cyan);
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.partner-desc {
    color: var(--text-secondary);
    line-height: 1.6;
    font-size: 0.9rem;
}

/* ========================================
   Features Section (Homepage)
   ======================================== */

.features-section {
    padding: var(--spacing-2xl) 0;
    background: var(--bg-secondary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-2xl);
}

.feature-card {
    background: var(--bg-card);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: all var(--transition-base);
}

.feature-card:hover {
    border-color: var(--accent-cyan);
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 217, 255, 0.1);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.feature-card h3 {
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
    font-size: 1.3rem;
}

.feature-card p {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
}

.feature-link {
    color: var(--accent-cyan);
    text-decoration: none;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    transition: all var(--transition-base);
}

.feature-link:hover {
    gap: 0.5rem;
}

/* ========================================
   Quick Access Section
   ======================================== */

.quick-access-section {
    padding: var(--spacing-2xl) 0;
    background: var(--bg-primary);
}

.quick-access-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.quick-card {
    background: linear-gradient(135deg, var(--bg-card) 0%, var(--bg-elevated) 100%);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(0, 217, 255, 0.1);
    text-decoration: none;
    text-align: center;
    transition: all var(--transition-base);
}

.quick-card:hover {
    border-color: var(--accent-cyan);
    transform: scale(1.05);
    box-shadow: 0 10px 30px rgba(0, 217, 255, 0.15);
}

.quick-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.quick-card h3 {
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.quick-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* ========================================
   Statistics Section
   ======================================== */

.stats-section {
    padding: var(--spacing-2xl) 0;
    background: var(--bg-secondary);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
}

.stat-item {
    text-align: center;
    padding: var(--spacing-xl);
}

.stat-number {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 800;
    color: var(--accent-cyan);
    margin-bottom: var(--spacing-sm);
}

.stat-label {
    font-size: 1rem;
    color: var(--text-secondary);
}

/* ========================================
   Company Info Section (About Page)
   ======================================== */

.company-info-section {
    padding: var(--spacing-2xl) 0;
    background: var(--bg-secondary);
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
}

.info-card {
    background: var(--bg-card);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.info-card h3 {
    color: var(--accent-cyan);
    margin-bottom: var(--spacing-lg);
    font-size: 1.5rem;
}

.timeline {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.timeline-item {
    display: flex;
    gap: var(--spacing-md);
    padding-left: var(--spacing-md);
    border-left: 2px solid var(--accent-cyan);
}

.timeline-year {
    color: var(--accent-cyan);
    font-weight: 700;
    font-size: 1.2rem;
    min-width: 60px;
}

.timeline-content h4 {
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.timeline-content p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.vision-content {
    padding: var(--spacing-lg);
}

.vision-text {
    color: var(--text-secondary);
    line-height: 2;
}

.vision-text strong {
    color: var(--accent-cyan);
    font-size: 1.2rem;
}

.tech-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.tech-list li {
    display: flex;
    gap: var(--spacing-md);
    align-items: flex-start;
}

.tech-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
}

.tech-list strong {
    color: var(--text-primary);
    display: block;
    margin-bottom: var(--spacing-xs);
}

.tech-list p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* ========================================
   Product Detail Section (Products Page)
   ======================================== */

.product-detail-section {
    padding: var(--spacing-2xl) 0;
    background: var(--bg-primary);
}

.product-detail-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.product-detail-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
    align-items: center;
}

.product-detail-grid.reverse {
    direction: rtl;
}

.product-detail-grid.reverse > * {
    direction: ltr;
}

.placeholder-product-large {
    width: 100%;
    height: 400px;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-tertiary);
    font-size: 1.2rem;
}

.product-detail-content h3 {
    color: var(--text-primary);
    font-size: 2rem;
    margin-bottom: var(--spacing-md);
}

.product-detail-desc {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: var(--spacing-lg);
}

.spec-table {
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.spec-row {
    display: flex;
    justify-content: space-between;
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.spec-row:last-child {
    border-bottom: none;
}

.spec-label {
    color: var(--text-secondary);
    font-weight: 600;
}

.spec-value {
    color: var(--accent-cyan);
}

.product-actions {
    display: flex;
    gap: var(--spacing-md);
}

/* ========================================
   Portfolio Sections
   ======================================== */

.portfolio-filter-section {
    padding: var(--spacing-xl) 0;
    background: var(--bg-secondary);
}

.filter-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

.filter-btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--accent-cyan);
    border-color: var(--accent-cyan);
    color: white;
}

.portfolio-grid-section {
    padding: var(--spacing-2xl) 0;
    background: var(--bg-primary);
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: var(--spacing-xl);
}

.portfolio-item {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: all var(--transition-base);
}

.portfolio-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

.portfolio-image {
    position: relative;
    overflow: hidden;
}

.placeholder-portfolio {
    width: 100%;
    height: 250px;
    background: var(--bg-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-tertiary);
}

.portfolio-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.85);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: all var(--transition-base);
}

.portfolio-item:hover .portfolio-overlay {
    opacity: 1;
}

.portfolio-overlay h3 {
    color: white;
    margin-bottom: var(--spacing-sm);
}

.portfolio-overlay p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.btn-view {
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--accent-cyan);
    border: none;
    border-radius: var(--radius-sm);
    color: white;
    font-weight: 600;
    cursor: pointer;
}

.portfolio-info {
    padding: var(--spacing-lg);
}

.portfolio-info h4 {
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.portfolio-meta {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    flex-wrap: wrap;
}

.meta-item {
    font-size: 0.85rem;
    color: var(--text-tertiary);
}

.portfolio-desc {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
}

.portfolio-tags {
    display: flex;
    gap: var(--spacing-xs);
    flex-wrap: wrap;
}

.tag {
    padding: 0.3rem 0.8rem;
    background: rgba(0, 217, 255, 0.1);
    border: 1px solid rgba(0, 217, 255, 0.3);
    border-radius: 20px;
    font-size: 0.75rem;
    color: var(--accent-cyan);
}

/* ========================================
   Shop Sections
   ======================================== */

.shop-filter-section {
    padding: var(--spacing-xl) 0;
    background: var(--bg-secondary);
}

.filter-controls {
    display: flex;
    gap: var(--spacing-lg);
    justify-content: center;
    flex-wrap: wrap;
}

.filter-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.filter-group label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 600;
}

.filter-select {
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.9rem;
}

.product-specs-mini {
    display: flex;
    gap: var(--spacing-sm);
    margin: var(--spacing-sm) 0;
    flex-wrap: wrap;
}

.product-specs-mini span {
    font-size: 0.8rem;
    color: var(--text-tertiary);
}

.original-price {
    text-decoration: line-through;
    color: var(--text-tertiary);
    margin-right: var(--spacing-xs);
    font-size: 0.9rem;
}

.pagination {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    margin-top: var(--spacing-2xl);
}

.page-btn {
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-base);
}

.page-btn:hover,
.page-btn.active {
    background: var(--accent-cyan);
    border-color: var(--accent-cyan);
    color: white;
}

/* ========================================
   Product Type Visualization - Quote Section
   ======================================== */

.emotional-note {
    font-size: 1.1rem;
    color: var(--text-secondary);
    font-style: italic;
    margin-top: var(--spacing-sm);
    text-align: center;
}

.product-type-section {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
    border: 1px solid rgba(0, 217, 255, 0.1);
}

.subsection-title {
    font-size: 1.8rem;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
    text-align: center;
}

.help-text {
    text-align: center;
    color: var(--text-secondary);
    font-size: 1rem;
    margin-bottom: var(--spacing-xl);
}

.comparison-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.comparison-card {
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: all var(--transition-base);
}

.comparison-card:hover {
    border-color: var(--accent-cyan);
    box-shadow: 0 0 30px rgba(0, 217, 255, 0.15);
}

.comparison-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
}

.comparison-header h4 {
    font-size: 1.2rem;
    color: var(--text-primary);
}

.info-badge {
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    color: white;
}

.comparison-visuals {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

.visual-item {
    text-align: center;
}

/* Light Simulation Boxes */
.light-simulation {
    height: 180px;
    background: #0d0d0d;
    border-radius: var(--radius-sm);
    position: relative;
    overflow: hidden;
    margin-bottom: var(--spacing-sm);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.light-source {
    position: absolute;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    width: 30px;
    height: 30px;
    background: radial-gradient(circle, #fff 0%, #ffeb3b 50%, transparent 100%);
    border-radius: 50%;
    box-shadow: 0 0 30px rgba(255, 235, 59, 0.8);
}

.light-source.multi {
    width: 50px;
    background:
        radial-gradient(circle at 30% 50%, #fff 0%, #ffeb3b 30%, transparent 50%),
        radial-gradient(circle at 70% 50%, #fff 0%, #ffeb3b 30%, transparent 50%);
    box-shadow: 0 0 25px rgba(255, 235, 59, 0.6);
}

.light-beam {
    position: absolute;
    top: 50px;
    left: 50%;
    transform: translateX(-50%);
    width: 120px;
    height: 130px;
    background: radial-gradient(ellipse at top, rgba(255, 235, 59, 0.4) 0%, rgba(255, 235, 59, 0.15) 50%, transparent 100%);
    clip-path: polygon(40% 0%, 60% 0%, 100% 100%, 0% 100%);
}

/* Light Beam Variants */
.light-beam.narrow {
    width: 60px;
    background: radial-gradient(ellipse at top, rgba(255, 235, 59, 0.6) 0%, rgba(255, 235, 59, 0.3) 50%, transparent 100%);
    clip-path: polygon(45% 0%, 55% 0%, 80% 100%, 20% 100%);
}

.light-beam.wide {
    width: 150px;
    background: radial-gradient(ellipse at top, rgba(255, 235, 59, 0.3) 0%, rgba(255, 235, 59, 0.1) 50%, transparent 100%);
    clip-path: polygon(30% 0%, 70% 0%, 100% 100%, 0% 100%);
}

/* Ceiling Line for Recessed/Adjustable */
.ceiling-line {
    position: absolute;
    top: 15px;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, transparent 0%, rgba(255,255,255,0.2) 50%, transparent 100%);
}

.light-source.fixed {
    top: 15px;
}

.light-source.rotating {
    top: 20px;
    left: 45%;
}

.light-beam.straight {
    top: 45px;
}

.light-beam.angled {
    top: 50px;
    left: 40%;
    transform: rotate(-15deg);
    transform-origin: top center;
}

.visual-label {
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
}

.visual-label strong {
    color: var(--accent-cyan);
    font-size: 0.95rem;
}

.visual-label span {
    color: var(--text-tertiary);
    font-size: 0.8rem;
}

/* Enhanced Product List */
.product-list-enhanced {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.product-item-enhanced {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: all var(--transition-base);
}

.product-item-enhanced:hover {
    border-color: var(--accent-cyan);
    box-shadow: 0 0 20px rgba(0, 217, 255, 0.1);
}

.product-main-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.product-main-info label {
    flex: 1;
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    cursor: pointer;
}

.product-visual-preview {
    width: 50px;
    height: 50px;
    background: var(--bg-secondary);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

/* Mini Light Demos */
.mini-light-demo {
    width: 100%;
    height: 100%;
    position: relative;
    background: #0a0a0a;
}

.mini-light-demo.cob::before {
    content: '';
    position: absolute;
    top: 10px;
    left: 50%;
    transform: translateX(-50%);
    width: 12px;
    height: 12px;
    background: radial-gradient(circle, #fff 0%, #ffeb3b 50%, transparent 100%);
    border-radius: 50%;
    box-shadow: 0 0 15px rgba(255, 235, 59, 0.8);
}

.mini-light-demo.cob::after {
    content: '';
    position: absolute;
    top: 22px;
    left: 50%;
    transform: translateX(-50%);
    width: 40px;
    height: 28px;
    background: radial-gradient(ellipse at top, rgba(255, 235, 59, 0.4) 0%, transparent 100%);
    clip-path: polygon(40% 0%, 60% 0%, 100% 100%, 0% 100%);
}

.mini-light-demo.strip {
    background: linear-gradient(to bottom,
        rgba(0, 217, 255, 0.3) 0%,
        rgba(168, 85, 247, 0.3) 50%,
        rgba(236, 72, 153, 0.3) 100%);
}

.mini-device-icon {
    font-size: 1.5rem;
}

.product-details {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
}

.product-name {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 1rem;
}

.product-specs {
    font-size: 0.85rem;
    color: var(--text-tertiary);
}

.product-image-toggle {
    margin-top: var(--spacing-sm);
    padding-top: var(--spacing-sm);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.toggle-preview-btn {
    width: 100%;
    padding: 0.6rem 1rem;
    background: linear-gradient(135deg, rgba(66, 133, 244, 0.2), rgba(0, 217, 255, 0.2));
    border: 1px solid var(--accent-cyan);
    border-radius: var(--radius-sm);
    color: var(--accent-cyan);
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all var(--transition-base);
}

.toggle-preview-btn:hover {
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
    color: white;
    box-shadow: 0 0 20px rgba(0, 217, 255, 0.4);
}

/* Preview Modal */
.preview-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.9);
    z-index: 10000;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(10px);
}

.preview-modal.active {
    display: flex;
}

.modal-content {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    max-width: 900px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    border: 1px solid rgba(0, 217, 255, 0.2);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.8), 0 0 40px rgba(0, 217, 255, 0.2);
}

.modal-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    width: 40px;
    height: 40px;
    background: var(--bg-secondary);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    transition: all var(--transition-base);
    z-index: 10;
}

.modal-close:hover {
    background: var(--accent-cyan);
    border-color: var(--accent-cyan);
    box-shadow: 0 0 20px rgba(0, 217, 255, 0.5);
}

.modal-body {
    padding: var(--spacing-2xl);
}

.preview-comparison {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.preview-state h4 {
    text-align: center;
    margin-bottom: var(--spacing-md);
    color: var(--text-secondary);
}

.preview-image {
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.room-preview {
    width: 100%;
    height: 300px;
    position: relative;
    transition: all 0.5s ease;
}

.room-preview.dark {
    background: linear-gradient(135deg, #1a1a1a 0%, #0d0d0d 100%);
}

.room-preview.lit {
    background: linear-gradient(135deg, #2a2419 0%, #1a1812 100%);
    position: relative;
}

.room-preview.lit::before {
    content: '';
    position: absolute;
    top: 20%;
    left: 50%;
    transform: translateX(-50%);
    width: 80%;
    height: 60%;
    background: radial-gradient(ellipse at center, rgba(255, 235, 59, 0.3) 0%, rgba(255, 200, 100, 0.1) 50%, transparent 100%);
    border-radius: 50%;
}

.preview-description {
    background: var(--bg-secondary);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.preview-description h3 {
    color: var(--accent-cyan);
    margin-bottom: var(--spacing-sm);
}

.preview-description p {
    color: var(--text-secondary);
    line-height: 1.8;
}

/* Responsive for Product Type Visualization */
@media (max-width: 768px) {
    .comparison-grid {
        grid-template-columns: 1fr;
    }

    .preview-comparison {
        grid-template-columns: 1fr;
    }

    .comparison-visuals {
        grid-template-columns: 1fr;
    }

    .product-main-info {
        flex-wrap: wrap;
    }
}