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

:root {
    --bg: #0a0a0f;
    --panel: #12121a;
    --panel-border: #1e1e2e;
    --cell-off: #1a1a2e;
    --cell-on: #00e5ff;
    --cell-on-rgb: 0, 229, 255;
    --accent: #6c5ce7;
    --accent-hover: #a29bfe;
    --text: #e0e0e0;
    --text-dim: #888;
    --danger: #ff6b6b;
    --success: #51cf66;
    --pos: #00e5ff;
    --neg: #ff6b6b;
}

body {
    background: var(--bg);
    color: var(--text);
    font-family: 'SF Mono', 'Fira Code', 'Cascadia Code', monospace;
    min-height: 100vh;
    min-height: 100dvh;
    overflow-x: hidden;
}

header {
    text-align: center;
    padding: 16px 20px 6px;
}

header h1 {
    font-size: 1.4rem;
    font-weight: 700;
    letter-spacing: 2px;
    background: linear-gradient(135deg, var(--cell-on), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

header p {
    font-size: 0.72rem;
    color: var(--text-dim);
    margin-top: 2px;
}

.app {
    display: grid;
    grid-template-columns: 190px 1fr 1fr 260px;
    grid-template-rows: auto auto;
    gap: 10px;
    max-width: 1440px;
    margin: 0 auto;
    padding: 8px 14px 16px;
    align-items: start;
}

.controls-panel { grid-row: 1 / 3; }
.grid-container { grid-column: 2; grid-row: 1; }
.weight-section { grid-column: 3; grid-row: 1; }
.inference-section { grid-column: 2 / 4; grid-row: 2; }
.right-panel { grid-row: 1 / 3; }

.panel {
    background: var(--panel);
    border: 1px solid var(--panel-border);
    border-radius: 10px;
    padding: 12px;
}

.panel h2 {
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--text-dim);
    margin-bottom: 8px;
}

.control-group { margin-bottom: 8px; }

.control-group label {
    display: block;
    font-size: 0.63rem;
    color: var(--text-dim);
    margin-bottom: 3px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.btn-row { display: flex; gap: 4px; }

.btn {
    flex: 1;
    padding: 5px 7px;
    border: 1px solid var(--panel-border);
    border-radius: 6px;
    background: var(--panel);
    color: var(--text);
    font-family: inherit;
    font-size: 0.65rem;
    cursor: pointer;
    transition: all 0.2s;
    text-align: center;
    -webkit-tap-highlight-color: transparent;
}

.btn:hover { border-color: var(--accent); background: rgba(108, 92, 231, 0.15); }
.btn.active { border-color: var(--cell-on); background: rgba(0, 229, 255, 0.12); color: var(--cell-on); }
.btn-primary { background: var(--accent); border-color: var(--accent); color: #fff; font-weight: 600; }
.btn-primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); }
.btn-danger { border-color: var(--danger); color: var(--danger); }
.btn-danger:hover { background: rgba(255, 107, 107, 0.15); }
.btn-full { width: 100%; flex: none; }

input[type="range"] {
    -webkit-appearance: none; width: 100%; height: 3px;
    border-radius: 2px; background: var(--panel-border); outline: none; margin: 4px 0;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none; width: 11px; height: 11px; border-radius: 50%;
    background: var(--cell-on); cursor: pointer;
    box-shadow: 0 0 6px rgba(var(--cell-on-rgb), 0.5);
}

.upload-area { position: relative; overflow: hidden; }

.upload-area input[type="file"] {
    position: absolute; top: 0; left: 0; width: 100%; height: 100%; opacity: 0; cursor: pointer;
}

.divider { height: 1px; background: var(--panel-border); margin: 8px 0; }

.presets-row { display: flex; flex-wrap: wrap; gap: 3px; }

.preset-btn {
    padding: 2px 6px; border: 1px solid var(--panel-border); border-radius: 3px;
    background: transparent; color: var(--text-dim); font-family: inherit;
    font-size: 0.68rem; cursor: pointer; transition: all 0.2s;
    -webkit-tap-highlight-color: transparent;
}

.preset-btn:hover { border-color: var(--accent); color: var(--text); }

.grid-container {
    display: flex; flex-direction: column; align-items: center; justify-content: center;
}

.grid-label {
    font-size: 0.6rem; color: var(--text-dim); text-transform: uppercase;
    letter-spacing: 1.5px; margin-bottom: 6px;
}

#gridCanvas { border-radius: 6px; cursor: crosshair; touch-action: none; }

.weight-section {
    display: flex; flex-direction: column; align-items: center;
}

.weight-section .grid-label { margin-bottom: 6px; }

.weight-tabs { display: flex; gap: 3px; margin-bottom: 6px; }
.weight-tabs .btn { padding: 3px 8px; font-size: 0.6rem; }

#weightCanvas { border-radius: 6px; cursor: crosshair; touch-action: none; }

.weight-legend {
    display: flex; align-items: center; justify-content: center;
    gap: 8px; margin-top: 6px; font-size: 0.58rem; color: var(--text-dim);
}

.legend-bar { width: 50px; height: 6px; border-radius: 3px; }
.legend-bar.neg-bar { background: linear-gradient(90deg, #1a1a2e, var(--neg)); }
.legend-bar.pos-bar { background: linear-gradient(90deg, #1a1a2e, var(--pos)); }

.weight-tooltip {
    margin-top: 5px; padding: 4px 8px; background: rgba(0,0,0,0.4);
    border-radius: 5px; font-size: 0.58rem; color: var(--text-dim);
    text-align: center; min-height: 1.8em; width: 100%;
}

.hebbian-box {
    margin-top: 6px; padding: 6px 8px; border-radius: 5px;
    background: rgba(0,0,0,0.3); font-size: 0.56rem; line-height: 1.45;
    color: var(--text-dim); width: 100%;
}

.hebbian-box code { color: var(--cell-on); font-size: 0.56rem; }

.hebbian-box .formula {
    text-align: center; padding: 4px 0; font-size: 0.62rem; color: var(--text);
}

.inference-section {
    background: var(--panel);
    border: 1px solid var(--panel-border);
    border-radius: 10px;
    padding: 12px 14px;
}

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

.inference-header h2 { margin-bottom: 0; }

.inference-header .neuron-badge {
    padding: 2px 8px; border-radius: 4px; font-size: 0.6rem;
    background: rgba(0,229,255,0.1); border: 1px solid rgba(0,229,255,0.2);
    color: var(--cell-on);
}

.inference-content { display: flex; gap: 14px; align-items: flex-start; }

.inference-equation {
    flex: 0 0 auto; display: flex; flex-direction: column; gap: 6px;
    padding: 8px 12px; background: rgba(0,0,0,0.3); border-radius: 8px;
    font-size: 0.62rem; min-width: 200px;
}

.eq-row { display: flex; justify-content: space-between; gap: 12px; }
.eq-label { color: var(--text-dim); }
.eq-val { font-weight: 600; }
.eq-val.pos { color: var(--pos); }
.eq-val.neg { color: var(--neg); }
.eq-divider { height: 1px; background: var(--panel-border); }

.inference-breakdown { flex: 1; min-width: 0; }

#inferenceCanvas {
    width: 100%; height: 80px; border-radius: 6px;
    background: rgba(0,0,0,0.2);
}

.inference-explanation {
    margin-top: 6px; font-size: 0.56rem; color: var(--text-dim); line-height: 1.5;
}

.inference-placeholder {
    text-align: center; padding: 16px; font-size: 0.62rem;
    color: var(--text-dim); font-style: italic;
}

.patterns-list { display: flex; flex-wrap: wrap; gap: 5px; margin-bottom: 8px; min-height: 26px; }

.pattern-thumb {
    position: relative; width: 40px; height: 40px; border-radius: 4px;
    border: 2px solid var(--panel-border); cursor: pointer;
    transition: all 0.2s; overflow: hidden;
}

.pattern-thumb:hover { border-color: var(--cell-on); box-shadow: 0 0 8px rgba(var(--cell-on-rgb), 0.3); }
.pattern-thumb canvas { width: 100%; height: 100%; display: block; }

.pattern-thumb .delete-btn {
    position: absolute; top: -1px; right: -1px; width: 13px; height: 13px;
    background: var(--danger); border: none; border-radius: 0 3px 0 3px;
    color: #fff; font-size: 8px; line-height: 13px; text-align: center;
    cursor: pointer; opacity: 0; transition: opacity 0.2s;
}

.pattern-thumb:hover .delete-btn { opacity: 1; }

.empty-state {
    font-size: 0.62rem; color: var(--text-dim);
    text-align: center; padding: 10px 0; font-style: italic;
}

#energyCanvas {
    width: 100%; height: 80px; border-radius: 5px; background: rgba(0,0,0,0.3);
}

#landscapeCanvas {
    width: 100%; height: 160px; border-radius: 5px; background: rgba(0,0,0,0.3);
    cursor: crosshair; touch-action: none;
}

.landscape-label {
    display: flex; justify-content: space-between; align-items: center;
    font-size: 0.55rem; color: var(--text-dim); margin-top: 4px;
}

.status-box {
    margin-top: 6px; padding: 6px 8px; border-radius: 6px;
    background: rgba(0,0,0,0.3); font-size: 0.6rem;
}

.status-box .status-line { display: flex; justify-content: space-between; padding: 2px 0; }
.status-box .status-value { color: var(--cell-on); font-weight: 600; }
.status-box .status-value.converged { color: var(--success); }

.capacity-bar { margin-top: 5px; }

.capacity-bar-track {
    width: 100%; height: 3px; background: var(--panel-border);
    border-radius: 2px; overflow: hidden; margin-top: 3px;
}

.capacity-bar-fill { height: 100%; background: var(--accent); border-radius: 2px; transition: width 0.3s; }
.capacity-bar-fill.warning { background: #ffd43b; }
.capacity-bar-fill.danger { background: var(--danger); }

.overlap-list { margin-top: 6px; }
.overlap-item { display: flex; align-items: center; gap: 5px; padding: 2px 0; font-size: 0.58rem; }
.overlap-bar { flex: 1; height: 3px; background: var(--panel-border); border-radius: 2px; overflow: hidden; }
.overlap-bar-fill { height: 100%; background: var(--cell-on); border-radius: 2px; transition: width 0.5s; }
.overlap-pct { width: 30px; text-align: right; color: var(--cell-on); font-weight: 600; }

footer {
    text-align: center; padding: 6px 20px 16px; font-size: 0.58rem; color: var(--text-dim);
}

footer kbd {
    display: inline-block; padding: 1px 4px; border: 1px solid var(--panel-border);
    border-radius: 3px; background: var(--panel); font-family: inherit;
    font-size: 0.55rem; margin: 0 1px;
}

.mobile-toolbar { display: none; }

.section-toggle { display: none; }

@media (max-width: 1200px) {
    .app { grid-template-columns: 190px 1fr 240px; }
    .weight-section { display: none; }
    .inference-section { grid-column: 2; }
}

@media (max-width: 900px) {
    header { padding: 12px 12px 4px; }
    header h1 { font-size: 1.15rem; }
    header p { font-size: 0.65rem; }

    .app {
        grid-template-columns: 1fr;
        grid-template-rows: auto;
        gap: 8px;
        padding: 6px 10px 12px;
        max-width: 600px;
    }

    .controls-panel,
    .grid-container,
    .weight-section,
    .inference-section,
    .right-panel {
        grid-column: 1;
        grid-row: auto;
    }

    .controls-panel {
        padding: 10px;
    }

    .controls-panel h2:first-child { display: none; }

    .controls-panel .control-group { margin-bottom: 6px; }

    .controls-panel .divider { margin: 6px 0; }

    .desktop-controls { display: none; }

    .mobile-toolbar {
        display: flex;
        gap: 4px;
        flex-wrap: wrap;
    }

    .mobile-toolbar .btn {
        padding: 8px 10px;
        font-size: 0.7rem;
        min-height: 38px;
    }

    .mobile-toolbar .btn-primary {
        min-width: 70px;
    }

    .desktop-controls { display: none; }

    .grid-container { min-height: auto; }

    #gridCanvas { max-width: 100%; }

    .weight-section { display: flex; }

    #weightCanvas { max-width: 100%; }

    .inference-section { padding: 10px; }

    .inference-content { flex-direction: column; gap: 8px; }

    .inference-equation { min-width: auto; width: 100%; }

    .inference-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 4px;
    }

    #inferenceCanvas { height: 60px; }

    .right-panel { padding: 10px; }

    #landscapeCanvas { height: 140px; }

    #energyCanvas { height: 70px; }

    .pattern-thumb { width: 44px; height: 44px; }
    .pattern-thumb .delete-btn {
        width: 18px; height: 18px; font-size: 11px; line-height: 18px;
        opacity: 1;
    }

    .section-toggle {
        display: flex;
        align-items: center;
        justify-content: space-between;
        cursor: pointer;
        -webkit-tap-highlight-color: transparent;
        padding: 4px 0;
    }

    .section-toggle h2 { margin-bottom: 0; pointer-events: none; }

    .section-toggle .toggle-arrow {
        font-size: 0.65rem;
        color: var(--text-dim);
        transition: transform 0.2s;
    }

    .section-toggle .toggle-arrow.collapsed { transform: rotate(-90deg); }

    .collapsible-content { overflow: hidden; transition: max-height 0.3s ease; }
    .collapsible-content.collapsed { max-height: 0 !important; }

    footer { display: none; }

    input[type="range"]::-webkit-slider-thumb {
        width: 18px; height: 18px;
    }

    .preset-btn { padding: 5px 10px; font-size: 0.72rem; min-height: 32px; }

    .btn { min-height: 36px; font-size: 0.7rem; }
    .weight-tabs .btn { min-height: 28px; }
}

@media (max-width: 400px) {
    .app { padding: 4px 6px 10px; }

    header h1 { font-size: 1rem; letter-spacing: 1px; }

    .panel { padding: 8px; border-radius: 8px; }

    .inference-section { padding: 8px; border-radius: 8px; }

    .hebbian-box { display: none; }
}