:root {
    --neon-blue: #00f3ff;
    --neon-pink: #ff00ff;
    --neon-green: #00ffaa;
    --bg-black: #050505;
    --card-bg: rgba(15, 15, 20, 0.85);
    --border-glow: rgba(0, 243, 255, 0.2);
    --font-mono: 'Share Tech Mono', monospace;
}

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

body {
    background-color: var(--bg-black);
    color: #f8fafc;
    font-family: 'Rajdhani', sans-serif;
    min-height: 100vh;
    overflow-x: hidden;
    background-image: 
        radial-gradient(circle at 50% 50%, rgba(0, 243, 255, 0.04) 0%, transparent 80%),
        linear-gradient(rgba(18, 16, 16, 0) 50%, rgba(0, 0, 0, 0.45) 50%),
        linear-gradient(90deg, rgba(255, 0, 0, 0.03), rgba(0, 255, 0, 0.01), rgba(0, 0, 255, 0.03));
    background-size: 100% 100%, 100% 4px, 3px 100%;
    padding-bottom: 80px;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 40px 20px;
}

header {
    text-align: center;
    margin-bottom: 50px;
    position: relative;
}

.nav-back {
    position: absolute;
    top: 10px;
    left: 10px;
    color: var(--neon-blue);
    text-decoration: none;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 8px;
    border: 1px solid var(--border-glow);
    padding: 8px 16px;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
    border-radius: 4px;
    transition: all 0.3s;
}

.nav-back:hover {
    border-color: var(--neon-blue);
    box-shadow: 0 0 15px rgba(0, 243, 255, 0.4);
    transform: translateX(-5px);
}

h1 {
    font-family: 'Orbitron', sans-serif;
    font-size: 3rem;
    font-weight: 900;
    text-transform: uppercase;
    letter-spacing: 6px;
    color: var(--neon-blue);
    text-shadow: 0 0 20px rgba(0, 243, 255, 0.4);
    margin-bottom: 8px;
}

.subtitle {
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.50);
    letter-spacing: 3px;
    text-transform: uppercase;
    font-family: 'Orbitron', sans-serif;
}

/* Flex wrap cards layout */
.cards-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 30px;
    justify-content: center;
    margin-top: 40px;
}

.card {
    background: var(--card-bg);
    border: 1px solid var(--border-glow);
    border-radius: 12px;
    width: 420px;
    min-height: 620px;
    backdrop-filter: blur(15px);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
    position: relative;
}

.card::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 12px;
    border: 1px solid transparent;
    background: linear-gradient(135deg, var(--neon-blue), var(--neon-pink)) border-box;
    -webkit-mask: linear-gradient(#fff 0 0) padding-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: destination-out;
    mask-composite: exclude;
    opacity: 0.15;
    pointer-events: none;
    transition: opacity 0.4s;
}

.card:hover {
    transform: translateY(-8px);
    border-color: rgba(0, 243, 255, 0.5);
    box-shadow: 0 12px 30px rgba(0, 243, 255, 0.1);
}

.card:hover::after {
    opacity: 0.5;
}

.card-header {
    padding: 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    background: rgba(255, 255, 255, 0.01);
}

.card-title {
    font-family: 'Orbitron', sans-serif;
    font-size: 1.3rem;
    color: #fff;
    margin-bottom: 6px;
    letter-spacing: 1px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-tag {
    font-size: 0.7rem;
    font-family: var(--font-mono);
    color: var(--neon-pink);
    border: 1px solid var(--neon-pink);
    padding: 2px 6px;
    border-radius: 3px;
    text-transform: uppercase;
}

.card-desc {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.6);
    line-height: 1.4;
}

/* 3D Viewport Area */
.preview-container {
    height: 220px;
    background: #09090c;
    position: relative;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.viewport-placeholder {
    width: 100%;
    height: 100%;
    cursor: grab;
}

.viewport-placeholder:active {
    cursor: grabbing;
}

/* Measurement HUD overlay */
.measure-hud {
    position: absolute;
    top: 10px;
    right: 10px;
    background: rgba(0, 0, 0, 0.8);
    border: 1px solid var(--neon-blue);
    padding: 8px 12px;
    border-radius: 6px;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    pointer-events: none;
    display: flex;
    flex-direction: column;
    gap: 4px;
    z-index: 10;
    box-shadow: 0 4px 10px rgba(0,0,0,0.5);
    backdrop-filter: blur(5px);
}

.measure-line {
    display: flex;
    justify-content: space-between;
    gap: 15px;
}

.measure-name {
    color: rgba(255, 255, 255, 0.5);
}

.measure-val {
    color: var(--neon-green);
    font-weight: bold;
}

/* Parameter Sliders Panel */
.params-panel {
    padding: 20px;
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 12px;
    background: rgba(0, 0, 0, 0.25);
}

.param-row {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.param-info {
    display: flex;
    justify-content: space-between;
    font-family: var(--font-mono);
    font-size: 0.8rem;
}

.param-label {
    color: rgba(255, 255, 255, 0.7);
}

.param-value {
    color: var(--neon-blue);
}

input[type="range"] {
    -webkit-appearance: none;
    width: 100%;
    height: 4px;
    background: #222;
    border-radius: 2px;
    outline: none;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 14px;
    height: 14px;
    background: var(--neon-blue);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 0 8px var(--neon-blue);
    transition: transform 0.1s;
}

input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

.export-btn {
    background: rgba(0, 243, 255, 0.1);
    border: 1px solid var(--neon-blue);
    color: var(--neon-blue);
    padding: 12px;
    font-family: 'Orbitron', sans-serif;
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.3s;
    margin: 20px;
    margin-top: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.export-btn:hover {
    background: var(--neon-blue);
    color: #000;
    box-shadow: 0 0 15px rgba(0, 243, 255, 0.4);
}

/* Scissor rendering master canvas */
#gl-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    pointer-events: none;
    z-index: 1;
}

/* Ambient scanline effects */
.scanline {
    width: 100%;
    height: 100px;
    z-index: 9999;
    background: linear-gradient(0deg, rgba(0, 0, 0, 0) 0%, rgba(0, 243, 255, 0.03) 50%, rgba(0, 0, 0, 0) 100%);
    opacity: 0.1;
    position: fixed;
    bottom: 100%;
    pointer-events: none;
    animation: scanline 8s linear infinite;
}

@keyframes scanline {
    0% { top: -100px; }
    100% { top: 100%; }
}

.status-bar {
    position: fixed;
    bottom: 15px;
    right: 15px;
    background: rgba(15, 15, 20, 0.9);
    border: 1px solid var(--border-glow);
    padding: 8px 16px;
    border-radius: 99px;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    z-index: 1000;
    display: flex;
    align-items: center;
    gap: 8px;
}

.status-dot {
    width: 8px;
    height: 8px;
    background: var(--neon-green);
    border-radius: 50%;
    box-shadow: 0 0 8px var(--neon-green);
}