:root {
    --bg-primary: #0b0f19;
    --bg-secondary: #111827;
    --bg-tertiary: #0f172a;
    --color-accent: #14b8a6;
    --color-accent-bright: #2dd4bf;
    --text-primary: #ffffff;
    --text-secondary: #8b9dc3;
    --border-color: rgba(255, 255, 255, 0.08);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    background: linear-gradient(135deg, var(--bg-primary) 0%, #0d1425 50%, var(--bg-primary) 100%);
    color: var(--text-primary);
    font-family: 'Plus Jakarta Sans', sans-serif;
    overflow-x: hidden;
    min-height: 100vh;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(11, 15, 25, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(20, 184, 166, 0.1);
    z-index: 1000;
    padding: 1rem 0;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--color-accent);
    text-decoration: none;
    font-weight: 700;
    font-size: 1rem;
    transition: var(--transition);
    font-family: 'Sora', sans-serif;
}

.nav-logo:hover {
    color: var(--color-accent-bright);
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    background: none;
    border: none;
    padding: 0;
    transition: all 0.3s ease;
}

.hamburger span {
    width: 24px;
    height: 2.5px;
    background: var(--color-accent);
    border-radius: 2px;
    transition: all 0.3s ease;
    transform-origin: center;
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(10px, 10px);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(8px, -8px);
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition);
}

.nav-links a:hover {
    color: var(--color-accent);
}

.mobile-nav {
    display: none;
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    background: rgba(11, 15, 25, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(20, 184, 166, 0.1);
    padding: 1.5rem;
    flex-direction: column;
    gap: 1.5rem;
    z-index: 999;
    animation: slideDown 0.3s ease;
}

.mobile-nav.active {
    display: flex;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.mobile-nav a {
    display: block;
    padding: 0.75rem 0;
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 1rem;
    border-bottom: 1px solid rgba(20, 184, 166, 0.1);
    transition: var(--transition);
}

.mobile-nav a:last-child {
    border-bottom: none;
}

.mobile-nav a:hover {
    color: var(--color-accent);
    padding-left: 0.5rem;
}

@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }

    .nav-links {
        display: none;
    }
}

/* Hero Section */
.hero {
    position: relative;
    padding: 120px 40px 80px;
    text-align: center;
    min-height: 85vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero-glow {
    position: absolute;
    top: 10%;
    left: 50%;
    transform: translateX(-50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(ellipse at center, rgba(20, 184, 166, 0.15) 0%, transparent 70%);
    border-radius: 50%;
    filter: blur(80px);
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 720px;
}

.hero-title {
    font-size: 64px;
    font-family: 'Sora', sans-serif;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, #ffffff 0%, var(--color-accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 20px;
    color: var(--text-secondary);
    opacity: 0.8;
    line-height: 1.7;
    margin-bottom: 2.5rem;
    max-width: 720px;
    margin-left: auto;
    margin-right: auto;
}

.hero-buttons {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    padding: 0.95rem 2.5rem;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    font-family: 'Plus Jakarta Sans', sans-serif;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    display: inline-block;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-bright) 100%);
    color: var(--bg-primary);
    box-shadow: 0 10px 30px rgba(20, 184, 166, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 15px 40px rgba(20, 184, 166, 0.4);
}

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

.btn-secondary:hover {
    background: rgba(20, 184, 166, 0.1);
    transform: translateY(-2px);
}

/* Sections */
.section {
    padding: 5rem 2rem;
    position: relative;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-family: 'Sora', sans-serif;
    font-weight: 700;
    margin-bottom: 3rem;
    text-align: center;
}

/* Problem Cards */
.problems-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.problem-card {
    background: rgba(17, 24, 39, 0.8);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 2rem;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.problem-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-accent) 0%, transparent 100%);
    opacity: 0;
    transition: var(--transition);
}

.problem-card:hover {
    border-color: var(--color-accent);
    transform: translateY(-6px);
    box-shadow: 0 20px 50px rgba(20, 184, 166, 0.1);
}

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

.card-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.problem-card h3 {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
    font-weight: 600;
}

.problem-card p {
    color: var(--text-secondary);
    line-height: 1.6;
    font-size: 0.95rem;
}

/* Solution Cards */
.solution-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.solution-card {
    background: rgba(15, 23, 42, 0.6);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 2rem;
    transition: var(--transition);
    text-align: center;
}

.solution-card:hover {
    border-color: var(--color-accent);
    transform: translateY(-6px);
    box-shadow: 0 0 30px rgba(20, 184, 166, 0.2);
    background: rgba(20, 184, 166, 0.05);
}

.solution-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.solution-card h3 {
    font-size: 1.15rem;
    margin-bottom: 0.75rem;
    font-weight: 600;
}

.solution-card p {
    color: var(--text-secondary);
    line-height: 1.6;
    font-size: 0.9rem;
}

/* Pipeline */
.pipeline {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
}

.pipeline-step {
    background: rgba(17, 24, 39, 0.8);
    backdrop-filter: blur(10px);
    border: 2px solid var(--color-accent);
    border-radius: 16px;
    padding: 2rem;
    text-align: center;
    min-width: 300px;
    position: relative;
    box-shadow: 0 0 20px rgba(20, 184, 166, 0.15);
    transition: var(--transition);
}

.pipeline-step:hover {
    box-shadow: 0 0 40px rgba(20, 184, 166, 0.3);
    transform: scale(1.02);
}

.pipeline-number {
    display: inline-block;
    width: 40px;
    height: 40px;
    background: var(--color-accent);
    color: var(--bg-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    margin-bottom: 0.75rem;
    font-size: 1.2rem;
}

.pipeline-step h3 {
    font-size: 1.15rem;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

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

.pipeline-connector {
    width: 3px;
    height: 30px;
    background: linear-gradient(180deg, var(--color-accent) 0%, transparent 100%);
}

/* Viewer Container */
.viewer-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: start;
}

.viewer-window {
    background: rgba(17, 24, 39, 0.8);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(20, 184, 166, 0.15);
}

.viewer-controls-top {
    display: flex;
    gap: 0.75rem;
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
    background: rgba(15, 23, 42, 0.5);
}

.view-toggle {
    background: rgba(20, 184, 166, 0.1);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    padding: 0.5rem 1rem;
    border-radius: 6px;
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    flex: 1;
}

.view-toggle:hover {
    background: rgba(20, 184, 166, 0.2);
    border-color: var(--color-accent);
    color: var(--color-accent);
}

.view-toggle.active {
    background: var(--color-accent);
    color: var(--bg-primary);
    border-color: var(--color-accent);
}

.viewer-display {
    aspect-ratio: 4 / 3;
    background: linear-gradient(135deg, rgba(20, 184, 166, 0.1) 0%, rgba(45, 212, 191, 0.05) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    min-height: 350px;
}

.floorplan-display {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.viewer-content {
    text-align: center;
    transition: var(--transition);
    display: none;
    width: 100%;
    height: 100%;
}

.viewer-content.active-view {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
}

.room-indicator {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--color-accent);
    font-family: 'Sora', sans-serif;
}

.room-visualization {
    color: var(--text-secondary);
    font-size: 1.1rem;
    max-width: 400px;
    line-height: 1.6;
}

.viewer-controls {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 0.75rem;
    padding: 1.5rem;
    border-top: 1px solid var(--border-color);
}

.room-button {
    background: rgba(20, 184, 166, 0.1);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    padding: 0.75rem;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.room-button:hover {
    background: rgba(20, 184, 166, 0.2);
    border-color: var(--color-accent);
    color: var(--color-accent);
}

.room-button.active {
    background: var(--color-accent);
    color: var(--bg-primary);
    border-color: var(--color-accent);
}

.room-details {
    background: rgba(17, 24, 39, 0.8);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 2rem;
}

.room-details h3 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    color: var(--color-accent);
}

.room-details ul {
    list-style: none;
}

.room-details li {
    padding: 0.75rem 0;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.room-details li:last-child {
    border-bottom: none;
}

.room-details li::before {
    content: '✓';
    color: var(--color-accent);
    font-weight: 700;
}

.room-specs {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--border-color);
}

.spec-item {
    text-align: center;
    padding: 1rem;
    background: rgba(20, 184, 166, 0.05);
    border-radius: 8px;
    border: 1px solid rgba(20, 184, 166, 0.1);
}

.spec-label {
    display: block;
    font-size: 0.75rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.spec-value {
    display: block;
    font-size: 1rem;
    color: var(--color-accent);
    font-weight: 600;
}

.room-features {
    list-style: none;
}
.vr-demo-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-top: 2rem;
}

.vr-viewer {
    background: rgba(17, 24, 39, 0.8);
    backdrop-filter: blur(10px);
    border: 2px solid var(--color-accent);
    border-radius: 16px;
    overflow: hidden;
    position: relative;
}

.vr-status {
    background: rgba(20, 184, 166, 0.2);
    color: var(--color-accent);
    padding: 1rem;
    text-align: center;
    font-weight: 600;
    border-bottom: 1px solid var(--color-accent);
}

.vr-display {
    aspect-ratio: 16 / 9;
    background: linear-gradient(135deg, rgba(20, 184, 166, 0.15) 0%, rgba(45, 212, 191, 0.08) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.vr-room {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-accent);
    text-align: center;
}

.vr-navigation {
    background: rgba(17, 24, 39, 0.8);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 2rem;
}

.vr-navigation h3 {
    font-size: 1.25rem;
    margin-bottom: 1.5rem;
}

.vr-rooms {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.vr-room-btn {
    background: rgba(20, 184, 166, 0.1);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    padding: 0.9rem;
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    text-align: left;
}

.vr-room-btn:hover {
    background: rgba(20, 184, 166, 0.2);
    border-color: var(--color-accent);
    color: var(--color-accent);
}

.vr-room-btn.active {
    background: var(--color-accent);
    color: var(--bg-primary);
    border-color: var(--color-accent);
}

/* Features Grid */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: rgba(15, 23, 42, 0.6);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 2rem;
    transition: var(--transition);
}

.feature-card:hover {
    border-color: var(--color-accent);
    box-shadow: 0 20px 50px rgba(20, 184, 166, 0.15);
    transform: translateY(-8px);
    background: rgba(20, 184, 166, 0.05);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.feature-card h3 {
    font-size: 1.15rem;
    margin-bottom: 0.75rem;
    font-weight: 600;
}

.feature-card p {
    color: var(--text-secondary);
    line-height: 1.6;
    font-size: 0.95rem;
}

/* Metrics */
.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.metric-card {
    background: rgba(17, 24, 39, 0.8);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 2rem;
    text-align: center;
    transition: var(--transition);
}

.metric-card:hover {
    border-color: var(--color-accent);
    box-shadow: 0 0 30px rgba(20, 184, 166, 0.2);
}

.metric-number {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 800;
    color: var(--color-accent);
    margin-bottom: 0.5rem;
    font-family: 'Sora', sans-serif;
}

.metric-label {
    font-size: 1.1rem;
    font-weight: 600;
}

/* Architecture Diagram */
.architecture-diagram {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    max-width: 800px;
    margin: 0 auto;
}

.arch-layer {
    background: rgba(17, 24, 39, 0.8);
    backdrop-filter: blur(10px);
    border: 2px solid var(--color-accent);
    border-radius: 12px;
    padding: 1.5rem;
    width: 100%;
    text-align: center;
    box-shadow: 0 0 20px rgba(20, 184, 166, 0.1);
    transition: var(--transition);
}

.arch-layer:hover {
    box-shadow: 0 0 40px rgba(20, 184, 166, 0.3);
    transform: scale(1.02);
}

.arch-icon {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.arch-label {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
}

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

.arch-arrow {
    color: var(--color-accent);
    font-size: 1.5rem;
    font-weight: bold;
}

/* Footer */
.footer {
    background: rgba(11, 15, 25, 0.8);
    border-top: 1px solid var(--border-color);
    padding: 3rem 2rem 1.5rem;
    margin-top: 3rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h4 {
    font-size: 1rem;
    margin-bottom: 1rem;
    color: var(--color-accent);
    font-weight: 700;
}

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

.footer-section li {
    margin-bottom: 0.75rem;
}

.footer-section a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.95rem;
    transition: color var(--transition);
}

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

.footer-bottom {
    text-align: center;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.footer-links {
    margin-top: 1rem;
}

.footer-links a {
    color: var(--color-accent);
    text-decoration: none;
    margin: 0 0.5rem;
    transition: color var(--transition);
}

.footer-links a:hover {
    color: var(--color-accent-bright);
}

/* Responsive */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }

    .nav-links {
        position: fixed;
        top: 0;
        right: -260px;
        width: 260px;
        height: 100vh;
        background: #0b0f19;
        flex-direction: column;
        gap: 1.5rem;
        padding: 6rem 1.5rem 2rem;
        transition: var(--transition);
        z-index: 999;
        border-left: 1px solid rgba(20, 184, 166, 0.1);
    }

    .nav-links.active {
        right: 0;
    }

    .nav-links a {
        padding: 0.75rem;
        border-radius: 6px;
        display: block;
    }

    .nav-links a:hover {
        background: rgba(20, 184, 166, 0.1);
    }

    .nav-container {
        padding: 0 1rem;
    }

    .hero {
        padding: 80px 20px 60px;
    }

    .hero-title {
        font-size: 32px;
    }

    .hero-subtitle {
        font-size: 16px;
    }

    .section {
        padding: 80px 20px;
    }

    .viewer-container,
    .vr-demo-container {
        grid-template-columns: 1fr;
    }

    .problems-grid,
    .solution-grid,
    .features-grid,
    .metrics-grid {
        grid-template-columns: 1fr;
    }

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

    .vr-rooms {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
        gap: 0.5rem;
    }

    .vr-room-btn {
        padding: 0.75rem;
        font-size: 0.85rem;
    }

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

@media (max-width: 480px) {
    .hero {
        padding: 80px 20px 60px;
    }

    .hero-title {
        font-size: 28px;
    }

    .hero-subtitle {
        font-size: 14px;
    }

    .section-title {
        font-size: 1.5rem;
    }

    .section {
        padding: 80px 20px;
    }

    .viewer-controls {
        grid-template-columns: repeat(auto-fit, minmax(80px, 1fr));
        padding: 1rem;
    }

    .room-button {
        font-size: 0.75rem;
        padding: 0.5rem;
    }

    .problems-grid,
    .solution-grid,
    .features-grid,
    .metrics-grid {
        grid-template-columns: 1fr;
    }

    .btn {
        padding: 0.7rem 1.5rem;
        font-size: 0.85rem;
    }
}