:root {
    --bg: #0a0e17;
    --bg2: #0d1117;
    --blue: #58a6ff;
    --purple: #bc8cff;
    --green: #3fb950;
    --red: #f85149;
    --yellow: #d29922;
    --text: #e6edf3;
    --text-dim: #8b949e;
    --glass-bg: rgba(22, 27, 38, 0.7);
    --glass-border: rgba(88, 166, 255, 0.15);
}

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

body {
    font-family: 'Bricolage Grotesque', sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    overflow-x: hidden;
}

.mono { font-family: 'JetBrains Mono', monospace; }

#bg-canvas-wrap {
    position: fixed;
    inset: 0;
    z-index: 0;
    opacity: 0.3;
    pointer-events: none;
}
#bgCanvas { width: 100%; height: 100%; }

#app {
    position: relative;
    z-index: 1;
    max-width: 1100px;
    margin: 0 auto;
    padding: 24px 16px 60px;
}

header {
    text-align: center;
    margin-bottom: 32px;
}

header h1 {
    font-size: clamp(1.6rem, 5vw, 2.8rem);
    font-weight: 800;
    background: linear-gradient(135deg, var(--purple), var(--blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.02em;
}

.subtitle {
    font-family: 'JetBrains Mono', monospace;
    color: var(--text-dim);
    font-size: 0.85rem;
    font-weight: 300;
    margin-top: 6px;
}

.glass-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 24px;
    margin-bottom: 24px;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    transition: opacity 0.4s, transform 0.4s;
}

.hidden {
    display: none !important;
}

/* Upload Zone */
#upload-zone {
    cursor: pointer;
    text-align: center;
    border: 2px dashed rgba(188, 140, 255, 0.3);
    background: rgba(188, 140, 255, 0.03);
    transition: all 0.3s;
}
#upload-zone:hover, #upload-zone.dragover {
    border-color: var(--purple);
    background: rgba(188, 140, 255, 0.08);
    transform: scale(1.01);
}

.upload-icon {
    font-size: 2.5rem;
    margin-bottom: 8px;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 0.5; transform: translateY(0); }
    50% { opacity: 1; transform: translateY(-4px); }
}

.upload-hint {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.7rem;
    color: var(--text-dim);
    display: block;
    margin-top: 4px;
}

/* Controls */
.controls-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 20px;
}

.control-group {
    position: relative;
}

.control-group label {
    display: block;
    font-size: 0.8rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.control-group label span {
    color: var(--blue);
    font-size: 0.85rem;
}

.tooltip-text {
    display: none;
    position: absolute;
    bottom: calc(100% + 8px);
    left: 0;
    right: 0;
    background: rgba(13, 17, 23, 0.95);
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    padding: 10px;
    font-size: 0.72rem;
    font-family: 'JetBrains Mono', monospace;
    color: var(--text-dim);
    z-index: 100;
    line-height: 1.4;
}

.control-group:hover .tooltip-text {
    display: block;
}

input[type="range"] {
    width: 100%;
    -webkit-appearance: none;
    appearance: none;
    height: 6px;
    border-radius: 3px;
    background: rgba(88, 166, 255, 0.15);
    outline: none;
}
input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--blue);
    cursor: pointer;
    box-shadow: 0 0 10px rgba(88, 166, 255, 0.5);
}

select {
    width: 100%;
    padding: 8px 12px;
    background: rgba(88, 166, 255, 0.08);
    border: 1px solid rgba(88, 166, 255, 0.2);
    border-radius: 8px;
    color: var(--text);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.8rem;
    outline: none;
}
select:focus { border-color: var(--blue); }

.arch-display { grid-column: 1 / -1; }

.arch-diagram {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 10px;
    background: rgba(0,0,0,0.2);
    border-radius: 8px;
}

.arch-layer {
    background: linear-gradient(180deg, rgba(188,140,255,0.2), rgba(88,166,255,0.2));
    border: 1px solid rgba(188,140,255,0.3);
    border-radius: 6px;
    padding: 6px 10px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.6rem;
    text-align: center;
    color: var(--text-dim);
    line-height: 1.3;
}

.arch-arrow {
    color: var(--text-dim);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
}

.skip-arrow {
    color: var(--purple);
    font-size: 0.65rem;
}

/* Buttons */
.button-row {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.btn {
    flex: 1;
    min-width: 140px;
    padding: 12px 16px;
    border: none;
    border-radius: 10px;
    font-family: 'Bricolage Grotesque', sans-serif;
    font-weight: 700;
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.2s;
    color: white;
}
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }
.btn:disabled { opacity: 0.4; cursor: not-allowed; transform: none; }

.btn-red { background: linear-gradient(135deg, #f85149, #da3633); }
.btn-yellow { background: linear-gradient(135deg, #d29922, #b87d14); }
.btn-green { background: linear-gradient(135deg, #3fb950, #238636); }
.btn-ghost {
    background: transparent;
    border: 1px solid var(--glass-border);
    color: var(--text-dim);
}
.btn-ghost:hover { border-color: var(--text-dim); }

/* Canvases */
.canvas-trio {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

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

.canvas-wrap label {
    display: block;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-dim);
    margin-bottom: 8px;
}

.canvas-wrap canvas {
    border-radius: 10px;
    border: 1px solid var(--glass-border);
    background: #000;
    image-rendering: pixelated;
    width: 200px;
    height: 200px;
}

.canvas-info {
    display: block;
    font-size: 0.7rem;
    color: var(--blue);
    margin-top: 6px;
}

/* Training Dashboard */
.dashboard-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 20px;
    align-items: start;
}

.dash-section label {
    display: block;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-dim);
    margin-bottom: 8px;
}

.dash-section canvas {
    width: 100%;
    border-radius: 8px;
    background: rgba(0,0,0,0.3);
    border: 1px solid var(--glass-border);
}

.status-row {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 6px;
}

.status-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--red);
    box-shadow: 0 0 8px var(--red);
    transition: all 0.3s;
}
.status-dot.training { background: var(--yellow); box-shadow: 0 0 8px var(--yellow); animation: blink 0.8s infinite; }
.status-dot.ready { background: var(--green); box-shadow: 0 0 8px var(--green); }

@keyframes blink { 0%,100%{opacity:1} 50%{opacity:0.3} }

#epochCounter {
    font-size: 0.8rem;
    color: var(--text-dim);
}

/* Filmstrip */
#filmstrip-wrap {
    margin-top: 0;
    margin-bottom: 24px;
}

#filmstrip-wrap label {
    display: block;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-dim);
    margin-bottom: 10px;
}

#filmstrip {
    display: flex;
    gap: 6px;
    overflow-x: auto;
    padding: 8px 0 12px;
    scrollbar-width: thin;
    scrollbar-color: var(--blue) transparent;
}

#filmstrip canvas {
    flex-shrink: 0;
    width: 52px;
    height: 52px;
    border-radius: 6px;
    border: 2px solid transparent;
    cursor: pointer;
    image-rendering: pixelated;
    transition: border-color 0.2s, transform 0.2s;
}

#filmstrip canvas:hover { transform: scale(1.1); }
#filmstrip canvas.active {
    border-color: var(--blue);
    box-shadow: 0 0 12px rgba(88, 166, 255, 0.4);
}

/* Footer */
footer {
    text-align: center;
    padding: 40px 0 0;
    color: var(--text-dim);
    font-size: 0.8rem;
}
footer a {
    color: var(--purple);
    text-decoration: none;
    display: inline-block;
    margin-top: 6px;
}
footer a:hover { text-decoration: underline; }

/* Responsive */
@media (max-width: 700px) {
    .controls-grid { grid-template-columns: 1fr; }
    .canvas-trio { flex-direction: column; align-items: center; }
    .canvas-wrap canvas { width: 240px; height: 240px; }
    .dashboard-grid { grid-template-columns: 1fr; }
    .arch-display { grid-column: 1; }
    .button-row { flex-direction: column; }
    .btn { min-width: 100%; }
}