/* Bio-Glass CSS — Dark Glassmorphism Redesign */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

:root {
    --bg-dark: #07091a;
    --bg-card: rgba(255, 255, 255, 0.04);
    --bg-card-hover: rgba(255, 255, 255, 0.07);
    --glass-border: rgba(255, 255, 255, 0.1);
    --glass-border-bright: rgba(255, 255, 255, 0.2);
    --text-primary: #e2e8f0;
    --text-secondary: #94a3b8;
    --text-muted: #4b5563;
    --accent-cyan: #22d3ee;
    --accent-purple: #a78bfa;
    --accent-green: #34d399;
    --accent-amber: #fbbf24;
    --accent-red: #f87171;
    --sidebar-width: 280px;
}

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

body {
    font-family: 'Inter', 'Segoe UI', system-ui, sans-serif;
    background: var(--bg-dark);
    min-height: 100vh;
    color: var(--text-primary);
    display: flex;
    overflow: hidden;
}

body::before {
    content: '';
    position: fixed;
    inset: 0;
    background:
        radial-gradient(ellipse 70% 60% at 15% 15%, rgba(34, 211, 238, 0.07) 0%, transparent 65%),
        radial-gradient(ellipse 55% 70% at 85% 85%, rgba(167, 139, 250, 0.07) 0%, transparent 65%),
        radial-gradient(ellipse 40% 40% at 50% 50%, rgba(52, 211, 153, 0.03) 0%, transparent 70%);
    pointer-events: none;
    z-index: 0;
}

.app-container {
    display: flex;
    flex: 1;
    height: 100vh;
    position: relative;
    z-index: 1;
}

/* ── SIDEBAR ─────────────────────────────── */

.sidebar {
    width: var(--sidebar-width);
    flex-shrink: 0;
    background: rgba(7, 9, 26, 0.85);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border-right: 1px solid var(--glass-border);
    display: flex;
    flex-direction: column;
    padding: 20px 14px;
    gap: 4px;
    overflow-y: auto;
    overflow-x: hidden;
}

.sidebar-header {
    padding: 4px 6px 18px;
    border-bottom: 1px solid var(--glass-border);
    margin-bottom: 8px;
}

.sidebar-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 3px;
}

.logo-icon {
    width: 34px;
    height: 34px;
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
    border-radius: 9px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    box-shadow: 0 0 18px rgba(34, 211, 238, 0.35);
    flex-shrink: 0;
}

.sidebar-logo h1 {
    font-size: 1.25rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--accent-cyan) 30%, var(--accent-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.02em;
}

.sidebar-subtitle {
    font-size: 0.68rem;
    color: var(--text-muted);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    padding-left: 44px;
}

.nav-section-label {
    font-size: 0.63rem;
    font-weight: 600;
    color: var(--text-muted);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    padding: 10px 8px 4px;
}

/* Module buttons */
.module-btn {
    display: flex;
    align-items: center;
    gap: 10px;
    width: 100%;
    padding: 11px 12px;
    border: 1px solid transparent;
    background: transparent;
    color: var(--text-secondary);
    text-align: left;
    cursor: pointer;
    border-radius: 10px;
    transition: all 0.18s ease;
    font-family: inherit;
}

.module-btn:hover {
    background: var(--bg-card-hover);
    border-color: var(--glass-border);
    color: var(--text-primary);
}

.module-btn.active {
    background: rgba(34, 211, 238, 0.08);
    border-color: rgba(34, 211, 238, 0.25);
    color: var(--accent-cyan);
}

.module-btn.active .module-badge {
    background: var(--accent-cyan);
    color: var(--bg-dark);
}

.module-icon {
    font-size: 1.2rem;
    width: 34px;
    height: 34px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.05);
    flex-shrink: 0;
}

.module-text { flex: 1; min-width: 0; }

.module-name {
    font-size: 0.84rem;
    font-weight: 600;
    display: block;
}

.module-sub {
    font-size: 0.69rem;
    color: var(--text-muted);
    display: block;
    margin-top: 1px;
}

.module-badge {
    font-size: 0.62rem;
    font-weight: 700;
    padding: 2px 7px;
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.08);
    color: var(--text-muted);
    letter-spacing: 0.04em;
    flex-shrink: 0;
}

/* Controls panel */
.controls-panel {
    border-top: 1px solid var(--glass-border);
    padding-top: 14px;
    margin-top: 6px;
    flex: 1;
    overflow-y: auto;
    min-height: 0;
}

.controls-panel h3 {
    font-size: 0.62rem;
    font-weight: 600;
    color: var(--text-muted);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    margin-bottom: 14px;
    padding: 0 2px;
}

.control-group { margin-bottom: 18px; }

.control-label {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}

.control-label span:first-child {
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.control-value {
    font-size: 0.78rem;
    font-weight: 700;
    color: var(--accent-cyan);
    background: rgba(34, 211, 238, 0.1);
    padding: 2px 9px;
    border-radius: 20px;
    font-family: 'SF Mono', 'Fira Code', monospace;
}

input[type="range"] {
    -webkit-appearance: none;
    width: 100%;
    height: 3px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 2px;
    outline: none;
    cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 15px;
    height: 15px;
    background: var(--accent-cyan);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 0 10px rgba(34, 211, 238, 0.6);
    transition: box-shadow 0.2s;
}

input[type="range"]::-webkit-slider-thumb:hover {
    box-shadow: 0 0 18px rgba(34, 211, 238, 0.9);
}

.btn-reset {
    width: 100%;
    padding: 9px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    color: var(--text-secondary);
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.82rem;
    font-weight: 500;
    font-family: inherit;
    transition: all 0.18s;
}

.btn-reset:hover {
    background: rgba(34, 211, 238, 0.1);
    border-color: rgba(34, 211, 238, 0.3);
    color: var(--accent-cyan);
}

.info-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    padding: 10px 12px;
    font-size: 0.76rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-top: 4px;
}

.info-card strong { color: var(--text-primary); }

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

.info-row:last-child { margin-bottom: 0; }

.info-dot {
    width: 9px;
    height: 9px;
    border-radius: 50%;
    flex-shrink: 0;
    box-shadow: 0 0 6px currentColor;
}

/* Sidebar footer */
.sidebar-footer {
    padding-top: 14px;
    border-top: 1px solid var(--glass-border);
    margin-top: auto;
}

.back-link {
    display: flex;
    align-items: center;
    gap: 6px;
    text-decoration: none;
    color: var(--text-muted);
    font-size: 0.76rem;
    padding: 8px;
    border-radius: 6px;
    transition: all 0.18s;
}

.back-link:hover {
    color: var(--text-secondary);
    background: var(--bg-card);
}

/* ── MAIN VIEW ───────────────────────────── */

.main-view {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: 18px 20px 20px;
    gap: 14px;
    overflow: hidden;
    min-width: 0;
}

.module-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-shrink: 0;
}

.module-title-block h2 {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: -0.01em;
}

.module-title-block p {
    font-size: 0.76rem;
    color: var(--text-secondary);
    margin-top: 2px;
}

/* ── CANVAS CONTAINER ────────────────────── */

#canvas-container {
    position: relative;
    flex: 1;
    min-height: 0;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    box-shadow:
        0 0 0 1px rgba(255, 255, 255, 0.04) inset,
        0 24px 64px rgba(0, 0, 0, 0.6);
    overflow: hidden;
}

#canvas-container::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 35%;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.035) 0%, transparent 100%);
    pointer-events: none;
    z-index: 2;
    border-radius: 16px 16px 0 0;
}

canvas { display: block; }

#canvas-overlay {
    position: absolute;
    inset: 0;
    pointer-events: none;
    z-index: 5;
    border-radius: 16px;
    overflow: hidden;
}

/* ── OVERLAYS ────────────────────────────── */

/* Module info top-left */
.module-info {
    position: absolute;
    top: 14px;
    left: 14px;
    background: rgba(7, 9, 26, 0.82);
    backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    padding: 10px 14px;
    border-radius: 10px;
    max-width: 300px;
    pointer-events: none;
}

.module-info h2 {
    font-size: 0.86rem;
    font-weight: 600;
    color: var(--accent-cyan);
    margin-bottom: 3px;
}

.module-info p {
    font-size: 0.72rem;
    color: var(--text-secondary);
    line-height: 1.45;
}

/* pH strip */
.ph-indicator {
    position: absolute;
    top: 14px;
    right: 14px;
    background: rgba(7, 9, 26, 0.82);
    backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 10px;
    padding: 10px 14px;
    z-index: 4;
    min-width: 180px;
}

.overlay-label {
    font-size: 0.62rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 7px;
}

.ph-strip {
    width: 100%;
    height: 10px;
    border-radius: 5px;
    background: linear-gradient(to right,
        #ff2222 0%,
        #ff6600 14%,
        #ffaa00 28%,
        #ccdd00 42%,
        #22cc44 50%,
        #00aaff 64%,
        #0044ff 78%,
        #6600cc 92%,
        #330066 100%
    );
    position: relative;
    margin-bottom: 6px;
}

.ph-marker {
    position: absolute;
    top: -4px;
    width: 3px;
    height: 18px;
    background: white;
    border-radius: 2px;
    transform: translateX(-50%);
    box-shadow: 0 0 8px rgba(255, 255, 255, 0.9);
    transition: left 0.25s ease;
}

.ph-readout {
    display: flex;
    justify-content: space-between;
    font-size: 0.68rem;
    color: var(--text-muted);
}

.ph-readout span:nth-child(2) {
    color: var(--text-primary);
    font-weight: 700;
    font-family: monospace;
}

/* Temperature gauge */
.temp-gauge {
    position: absolute;
    top: 14px;
    right: 14px;
    background: rgba(7, 9, 26, 0.82);
    backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 10px;
    padding: 10px 14px;
    z-index: 4;
    min-width: 180px;
}

.temp-bar {
    width: 100%;
    height: 10px;
    border-radius: 5px;
    background: linear-gradient(to right, #60a5fa, #34d399, #fbbf24, #f97316, #ef4444);
    position: relative;
    margin-bottom: 6px;
}

.temp-marker {
    position: absolute;
    top: -4px;
    width: 3px;
    height: 18px;
    background: white;
    border-radius: 2px;
    transform: translateX(-50%);
    box-shadow: 0 0 8px rgba(255, 255, 255, 0.9);
    transition: left 0.25s ease;
}

.temp-readout {
    display: flex;
    justify-content: space-between;
    font-size: 0.68rem;
    color: var(--text-muted);
}

.temp-readout span:nth-child(2) {
    color: var(--text-primary);
    font-weight: 700;
    font-family: monospace;
}

/* Reaction counters */
.reaction-counters {
    position: absolute;
    bottom: 14px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
    z-index: 4;
}

.counter-chip {
    background: rgba(7, 9, 26, 0.82);
    backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    padding: 7px 14px;
    display: flex;
    align-items: center;
    gap: 7px;
    font-size: 0.76rem;
    white-space: nowrap;
    color: var(--text-secondary);
}

.counter-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    flex-shrink: 0;
}

.counter-count {
    font-weight: 700;
    color: var(--text-primary);
    font-family: monospace;
    min-width: 22px;
    text-align: right;
}

/* Rate display (kinetics) */
.rate-chip {
    position: absolute;
    bottom: 14px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(7, 9, 26, 0.82);
    backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    padding: 7px 18px;
    font-size: 0.76rem;
    color: var(--text-secondary);
    z-index: 4;
    text-align: center;
    white-space: nowrap;
}

.rate-chip .rate-val {
    color: var(--accent-green);
    font-weight: 700;
    font-family: monospace;
}

/* Denatured alert */
.denatured-alert {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(239, 68, 68, 0.12);
    border: 1px solid rgba(239, 68, 68, 0.35);
    backdrop-filter: blur(12px);
    border-radius: 12px;
    padding: 14px 28px;
    text-align: center;
    z-index: 6;
    display: none;
}

.denatured-alert.show { display: block; animation: pulse-red 2s ease-in-out infinite; }

@keyframes pulse-red {
    0%, 100% { opacity: 0.75; }
    50% { opacity: 1; }
}

.denatured-alert h3 { color: #f87171; font-size: 1rem; margin-bottom: 3px; }
.denatured-alert p { font-size: 0.74rem; color: var(--text-secondary); }

/* ATP Display (glycolysis) */
.atp-display {
    position: absolute;
    top: 14px;
    right: 14px;
    background: rgba(7, 9, 26, 0.85);
    backdrop-filter: blur(12px);
    border: 1px solid rgba(251, 191, 36, 0.25);
    border-radius: 12px;
    padding: 12px 20px;
    text-align: center;
    z-index: 4;
    min-width: 100px;
}

.atp-label {
    font-size: 0.62rem;
    font-weight: 600;
    color: var(--accent-amber);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 2px;
}

.atp-value {
    font-size: 2.4rem;
    font-weight: 800;
    color: var(--accent-amber);
    font-family: monospace;
    line-height: 1.05;
    text-shadow: 0 0 24px rgba(251, 191, 36, 0.55);
    transition: all 0.25s;
}

.atp-status {
    font-size: 0.62rem;
    color: var(--text-muted);
    margin-top: 2px;
}

/* Glycolysis station labels */
.station-label {
    position: absolute;
    background: rgba(7, 9, 26, 0.78);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 6px;
    padding: 3px 8px;
    font-size: 0.62rem;
    font-weight: 600;
    color: var(--text-secondary);
    transform: translateX(-50%);
    white-space: nowrap;
    pointer-events: none;
    backdrop-filter: blur(8px);
    line-height: 1.4;
    text-align: center;
}

.station-label .step-num {
    color: var(--accent-cyan);
    font-family: monospace;
}

/* Chart container */
#chart-container {
    position: absolute;
    bottom: 14px;
    right: 14px;
    width: 290px;
    height: 165px;
    background: rgba(7, 9, 26, 0.88);
    backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    padding: 12px;
    border-radius: 12px;
    display: none;
    z-index: 4;
}

/* Scrollbar */
::-webkit-scrollbar { width: 3px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(255, 255, 255, 0.08); border-radius: 2px; }

.hidden { display: none !important; }