:root {
    --font-main: 'Outfit', sans-serif;
    --primary: #3b82f6;
    --primary-glow: rgba(59, 130, 246, 0.5);
    --secondary: #6366f1;
    --accent: #f99000;
    --bg-gradient: linear-gradient(135deg, #0f172a 0%, #1e1b4b 100%);
    --card-bg: rgba(255, 255, 255, 0.05);
    --card-border: rgba(255, 255, 255, 0.1);
    --glass-bg: rgba(255, 255, 255, 0.03);
    --glass-blur: blur(16px);
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --shadow-premium: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    --engineering-orange: #f99000;
}

[data-theme="light"] {
    --primary: #2563eb;
    --primary-glow: rgba(37, 99, 235, 0.2);
    --bg-gradient: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    --card-bg: rgba(255, 255, 255, 0.7);
    --card-border: rgba(255, 255, 255, 0.5);
    --glass-bg: rgba(255, 255, 255, 0.6);
    --text-main: #0f172a;
    --text-muted: #64748b;
    --shadow-premium: 0 20px 40px rgba(0, 0, 0, 0.08);
    --engineering-orange: #f99000;
}

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

body {
    font-family: var(--font-main);
    background: var(--bg-gradient);
    background-attachment: fixed;
    color: var(--text-main);
    min-height: 100vh;
    overflow-x: hidden;
}

/* Animated background blobs for Premium feel */
body::before {
    content: '';
    position: fixed;
    top: -10%; left: -10%;
    width: 40%; height: 40%;
    background: radial-gradient(circle, var(--primary-glow) 0%, transparent 70%);
    z-index: -1;
    filter: blur(80px);
    animation: move 20s infinite alternate;
}

@keyframes move {
    from { transform: translate(0, 0); }
    to { transform: translate(50%, 50%); }
}

.container {
    width: 92%;
    max-width: 1100px;
    margin: 0 auto;
}

/* Premium Topbar */
.topbar {
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    background: var(--glass-bg);
    border-bottom: 1px solid var(--card-border);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.topbar-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 0;
}

.brand-side {
    display: flex;
    align-items: center;
    gap: 12px;
}

.brand-side img {
    height: 44px;
    filter: drop-shadow(0 0 8px var(--primary-glow));
}

.brand-side span {
    font-size: 1.1rem;
    font-weight: 800;
    color: var(--text-main);
    letter-spacing: -0.5px;
}

/* Contact Card */
.contact-card {
    margin-top: 30px;
    padding: 24px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: 20px;
    display: flex;
    align-items: center;
    gap: 20px;
    color: #fff;
    box-shadow: 0 15px 30px var(--primary-glow);
    transition: transform 0.3s ease;
}

.contact-card:hover {
    transform: scale(1.02);
}

.contact-icon {
    font-size: 2rem;
    background: rgba(255, 255, 255, 0.2);
    min-width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 15px;
    backdrop-filter: blur(5px);
}

.contact-info h3 {
    margin: 0;
    font-size: 1.1rem;
    font-weight: 700;
}

.contact-info p {
    margin: 4px 0 0;
    font-size: 0.85rem;
    opacity: 0.8;
}

.action-side {
    display: flex;
    align-items: center;
    gap: 16px;
}

/* Glass Buttons */
.btn-secondary {
    background: var(--glass-bg);
    border: 1px solid var(--card-border);
    color: var(--text-main);
    padding: 10px 20px;
    border-radius: 12px;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.3s ease;
    backdrop-filter: blur(5px);
}

.btn-secondary:hover {
    background: var(--primary);
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 10px 20px var(--primary-glow);
}

/* Modern Tabs */
.tabs {
    display: flex;
    background: var(--glass-bg);
    padding: 6px;
    border-radius: 100px;
    gap: 8px;
    margin: 40px 0 30px;
    border: 1px solid var(--card-border);
}

.tab-btn {
    flex: 1;
    border: none;
    background: transparent;
    padding: 14px 20px;
    border-radius: 100px;
    font-weight: 700;
    font-size: 0.9rem;
    color: var(--text-muted);
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.tab-btn.active {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 8px 20px var(--primary-glow);
}

/* Premium Card */
.card {
    background: var(--card-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--card-border);
    border-radius: 32px;
    padding: 40px;
    box-shadow: var(--shadow-premium);
}

.field label {
    font-weight: 700;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 12px;
    display: block;
    color: var(--text-muted);
}

select, input[type="number"] {
    background: rgba(0, 0, 0, 0.2);
    border: 2px solid var(--card-border);
    color: #fff;
    padding: 16px 20px;
    border-radius: 16px;
    font-weight: 600;
    font-size: 1rem;
    width: 100%;
    transition: all 0.3s ease;
}

[data-theme="light"] select, [data-theme="light"] input {
    background: #fff;
    color: #0f172a;
    border: 2px solid #e2e8f0;
}

select:focus, input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px var(--primary-glow);
    outline: none;
}

/* Mode Toggle */
.mode-toggle {
    display: grid;
    grid-template-columns: 1fr 1fr;
    background: var(--glass-bg);
    padding: 6px;
    border-radius: 16px;
    margin-bottom: 30px;
    border: 1px solid var(--card-border);
}

.mode-btn {
    border: none;
    background: transparent;
    padding: 12px;
    border-radius: 12px;
    font-weight: 700;
    color: var(--text-muted);
    cursor: pointer;
    transition: all 0.3s ease;
}

.mode-btn.active {
    background: var(--card-bg);
    color: var(--primary);
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}

/* Visualizer Area */
.preview-section {
    margin-top: 50px;
    height: 550px;
    background: radial-gradient(circle at 50% 50%, rgba(255,255,255,0.05) 0%, transparent 80%);
    border-radius: 40px;
    border: 1px solid var(--card-border);
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: flex-end;
    justify-content: center;
    padding-bottom: 80px;
}

.ground-line {
    position: absolute;
    bottom: 80px;
    width: 100%;
    height: 2px;
    background: linear-gradient(to right, transparent, var(--card-border), transparent);
}

.ground-label {
    position: absolute;
    bottom: -25px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.7rem;
    font-weight: 800;
    color: var(--text-muted);
    text-transform: uppercase;
}

/* Screen Viz */
.screen-viz {
    background: #000;
    border: 3px solid var(--engineering-orange);
    border-radius: 4px;
    box-shadow: 0 0 0 2px rgba(0,0,0,0.5), 0 30px 80px rgba(0,0,0,0.6), 0 0 40px rgba(249, 144, 0, 0.15);
    position: relative;
    transition: all 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Dimension Lines (Engineering Style) */
.dim-line {
    position: absolute;
    background: var(--engineering-orange);
    opacity: 0.8;
}

.dim-top-line {
    top: -16px;
    left: 0;
    right: 0;
    height: 1px;
}

.dim-top-line::before, .dim-top-line::after {
    content: '';
    position: absolute;
    width: 1px;
    height: 8px;
    background: var(--engineering-orange);
    top: -4px;
}
.dim-top-line::before { left: 0; }
.dim-top-line::after { right: 0; }

.dim-right-line {
    right: -16px;
    top: 0;
    bottom: 0;
    width: 1px;
}

.dim-right-line::before, .dim-right-line::after {
    content: '';
    position: absolute;
    height: 1px;
    width: 8px;
    background: var(--engineering-orange);
    right: -4px;
}
.dim-right-line::before { top: 0; }
.dim-right-line::after { bottom: 0; }

.dim-label {
    position: absolute;
    font-size: 0.7rem;
    font-weight: 900;
    color: var(--engineering-orange);
    background: var(--card-bg);
    backdrop-filter: blur(4px);
    padding: 0 6px;
    border-radius: 4px;
    white-space: nowrap;
    z-index: 15;
    font-family: 'IBM Plex Mono', monospace;
}

.dim-w-label {
    top: -16px;
    left: 50%;
    transform: translate(-50%, -50%);
}

.dim-h-label {
    right: -20px;
    top: 50%;
    transform: translate(100%, -50%);
}

.screen-image-bg {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, #0a1628 0%, #0d2a4a 50%, #0a1628 100%);
    opacity: 0.8;
}

.screen-overlay {
    z-index: 10;
    text-align: center;
}

.overlay-array {
    font-size: 1.2rem;
    font-weight: 900;
    color: var(--engineering-orange);
    font-family: 'IBM Plex Mono', monospace;
}

/* Human Scale */
.scale-ref {
    position: absolute;
    bottom: 80px;
    left: calc(50% - 150px);
    z-index: 50;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.human-svg {
    height: 120px;
    color: var(--text-main);
    opacity: 0.6;
}

.human-label {
    font-size: 0.6rem;
    color: var(--text-muted);
    font-weight: 800;
    text-transform: uppercase;
    position: absolute;
    right: -40px;
    top: 50%;
    transform: translateY(-50%) rotate(-90deg);
    white-space: nowrap;
}

/* Floating Label */
.screen-product-label {
    position: absolute;
    top: 30px;
    left: 30px;
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    padding: 8px 18px;
    border-radius: 12px;
    border: 1px solid var(--engineering-orange);
    display: flex;
    align-items: center;
    gap: 12px;
    box-shadow: var(--shadow-premium);
}

.label-badge {
    background: var(--engineering-orange);
    color: #fff;
    padding: 2px 10px;
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 900;
}

/* Responsive */
@media (max-width: 768px) {
    .topbar-inner {
        padding: 10px 0;
    }
    .brand-side span { display: none; }
    .card { padding: 24px; border-radius: 24px; }
    .preview-section { height: 400px; }
    .scale-ref { left: 20px; transform: scale(0.8); }
}

.row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

@media (max-width: 600px) {
    .row { grid-template-columns: 1fr; }
}

/* Technical Specification Table (Public) */
.spec-table-public {
    width: 100%;
    border-collapse: collapse;
    table-layout: fixed;
    font-size: 0.8rem;
    color: var(--text-main);
    border: 1px solid var(--engineering-orange);
}

.spec-table-public thead th {
    background: var(--engineering-orange);
    color: #fff;
    font-weight: 800;
    text-align: center;
    padding: 8px;
    font-size: 0.75rem;
    letter-spacing: 1px;
}

.spec-table-public td {
    padding: 10px 12px;
    border: 1px solid rgba(249, 144, 0, 0.2);
    vertical-align: middle;
}

.spec-table-public tr:nth-child(even) {
    background: rgba(255, 255, 255, 0.02);
}

.spec-table-public tr.highlight-row {
    background: rgba(249, 144, 0, 0.05);
}

.table-wrap {
    overflow-x: auto;
    border-radius: 8px;
    border: 1px solid rgba(249, 144, 0, 0.3);
}

@media (max-width: 600px) {
    .spec-table-public {
        font-size: 0.7rem;
    }
    .spec-table-public td {
        padding: 6px 8px;
    }
}