/* ─── Color Tokens ────────────────────────────────────────────────────────── */

:root {
    color-scheme: light dark;

    /* Surfaces */
    --bg-color:              light-dark(#f1f5f9,                 #080c14);
    --panel-bg:              light-dark(#ffffff,                  rgba(255, 255, 255, 0.04));
    --border-color:          light-dark(#e2e8f0,                  rgba(255, 255, 255, 0.09));
    --glass-shadow:          light-dark(rgba(15, 23, 42, 0.08),   rgba(0, 0, 0, 0.45));

    /* Text */
    --text-primary:          light-dark(#0f172a,                  #e2e8f0);
    --text-secondary:        light-dark(#64748b,                  #94a3b8);

    /* Accent */
    --accent-primary:        light-dark(#0284c7,                  #38bdf8);
    --accent-secondary:      light-dark(#4f46e5,                  #818cf8);
    --accent-glow:           light-dark(rgba(2, 132, 199, 0.15),  rgba(56, 189, 248, 0.18));

    /* UI Controls */
    --ui-btn-bg:             light-dark(rgba(15, 23, 42, 0.05),   rgba(255, 255, 255, 0.05));
    --ui-btn-hover:          light-dark(rgba(15, 23, 42, 0.09),   rgba(255, 255, 255, 0.11));
    --ui-input-bg:           light-dark(#ffffff,                  rgba(255, 255, 255, 0.06));
    --ui-input-text:         light-dark(#0f172a,                  #e2e8f0);
    --ui-border-prominent:   light-dark(rgba(15, 23, 42, 0.12),   rgba(255, 255, 255, 0.14));
    --ui-switch-bg:          light-dark(rgba(15, 23, 42, 0.15),   rgba(255, 255, 255, 0.13));
    --ui-switch-knob:        light-dark(#ffffff,                  #f1f5f9);

    /* Status */
    --success:               light-dark(#16a34a,                  #4ade80);
    --warning:               light-dark(#d97706,                  #fbbf24);

    /* Decorative glows */
    --glow-top:              light-dark(rgba(2, 132, 199, 0.08),  rgba(56, 189, 248, 0.10));
    --glow-bottom:           light-dark(rgba(79, 70, 229, 0.07),  rgba(129, 140, 248, 0.09));

    /* Visualization */
    --viz-bg:                light-dark(#f8fafc,                  #0d1526);
    --viz-grid:              light-dark(rgba(15, 23, 42, 0.14),   rgba(255, 255, 255, 0.15));
    --viz-text:              light-dark(rgba(15, 23, 42, 0.75),   rgba(255, 255, 255, 0.60));
    --viz-obstacle:          light-dark(#475569,                  #94a3b8);
    --obstacle-color:        light-dark(#334155,                  #cbd5e1);
    --viz-workspace:         light-dark(#0369a1,                  #0ea5e9);
    --viz-start:             light-dark(#be185d,                  #f472b6);
    --viz-obj:               light-dark(#be123c,                  #f43f5e);
    --viz-box:               light-dark(#6d28d9,                  #8b5cf6);
    --viz-match-known:       light-dark(#1d4ed8,                  #60a5fa);
    --viz-match-unknown:     light-dark(#15803d,                  #22c55e);
    --viz-penalty:           light-dark(#dc2626,                  #ef4444);
    --viz-missing:           light-dark(#b45309,                  #f59e0b);
    --viz-hover:             light-dark(#0369a1,                  #38bdf8);
    --viz-tooltip:           light-dark(rgba(15, 23, 42, 0.88),   rgba(0, 0, 0, 0.85));
    --viz-axis:              light-dark(rgba(15, 23, 42, 0.55),   rgba(255, 255, 255, 0.45));
    --viz-unused:            light-dark(rgba(71, 85, 105, 0.55),  rgba(148, 163, 184, 0.45));
}

/* Manual theme overrides — flip color-scheme; light-dark() re-evaluates automatically */
[data-theme="light"] { color-scheme: light; }
[data-theme="dark"]  { color-scheme: dark; }
[data-theme="auto"]  { color-scheme: light dark; }

/* ─── Reset ───────────────────────────────────────────────────────────────── */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
}

body {
    color-scheme: inherit;
    background-color: var(--bg-color);
    color: var(--text-primary);
    height: 100vh;
    overflow: hidden;
    display: flex;
    justify-content: center;
}

.background-glow {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 50% 0%, var(--glow-top) 0%, transparent 50%),
        radial-gradient(circle at 0% 100%, var(--glow-bottom) 0%, transparent 50%);
    pointer-events: none;
    z-index: -1;
}

.container {
    width: 100%;
    max-width: 1600px;
    height: 100vh;
    padding: 0.75rem 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

.glass-panel {
    background: var(--panel-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 1.25rem;
    box-shadow: 0 8px 32px var(--glass-shadow);
}

.header-section {
    position: relative;
    text-align: center;
    padding: 0.6rem 1.25rem;
}

.theme-toggle-btn {
    position: absolute;
    top: 50%;
    right: 1.5rem;
    transform: translateY(-50%);
    background: var(--ui-btn-bg);
    border: 1px solid var(--ui-border-prominent);
    width: 42px;
    height: 42px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

#shortcutsBtn {
    right: calc(1.5rem + 42px + 0.5rem);
    transform: translateY(-50%);
    font-weight: 700;
    color: var(--text-primary);
    background: var(--ui-btn-bg);
    border: 1px solid var(--ui-border-prominent);
    width: 42px;
    height: 42px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.theme-toggle-btn:hover,
#shortcutsBtn:hover {
    transform: translateY(-50%) scale(1.1);
    background: var(--ui-btn-hover);
    border-color: var(--accent-primary);
}

h1 {
    font-family: 'Outfit', sans-serif;
    font-size: 1.6rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    margin-bottom: 0.1rem;
}

/* Gradient text — uses accent vars which already adapt to light/dark */
.gradient-text {
    background-color: var(--accent-primary); /* solid fallback */
    background-image: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline-block;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    opacity: 0.9;
}

.mode-toggle-container {
    display: flex;
    justify-content: center;
    margin-bottom: 0.5rem;
}

.mode-switch {
    display: flex;
    gap: 0.5rem;
    padding: 0.5rem;
    border-radius: 50px;
    background: var(--ui-btn-bg);
    border: 1px solid var(--ui-border-prominent);
}

.mode-btn {
    padding: 0.75rem 1.5rem;
    border-radius: 40px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.mode-btn.active {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: white;
    box-shadow: 0 4px 15px var(--accent-glow);
}

.mode-btn:hover:not(.active) {
    background: var(--ui-btn-hover);
    color: var(--text-primary);
}

.main-grid {
    flex: 1;
    display: grid;
    grid-template-columns: 270px 1fr;
    gap: 1.25rem;
    min-height: 0;
}

.control-group {
    margin-bottom: 2rem;
}

h3 {
    font-family: 'Outfit', sans-serif;
    font-size: 1.2rem;
    margin-bottom: 1.2rem;
    color: var(--accent-primary);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.input-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-bottom: 1rem;
}

.input-field {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

label {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

input[type="number"],
input[type="text"] {
    background: var(--ui-input-bg);
    border: 1px solid var(--ui-border-prominent);
    border-radius: 8px;
    padding: 0.8rem;
    color: var(--ui-input-text);
    font-size: 1rem;
    transition: all 0.2s ease;
}

/* Custom spinner wrapper */
.num-spin-wrap {
    display: flex;
    align-items: stretch;
    border: 1px solid var(--ui-border-prominent);
    border-radius: 8px;
    overflow: hidden;
    background: var(--ui-input-bg);
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.num-spin-wrap:focus-within {
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 4px var(--accent-glow);
}

.num-spin-wrap input[type="number"] {
    flex: 1;
    min-width: 0;
    border: none !important;
    border-radius: 0 !important;
    padding: 0.8rem 0.2rem;
    text-align: center;
    background: transparent;
    box-shadow: none !important;
    -moz-appearance: textfield;
    appearance: textfield;
}

.num-spin-wrap input[type="number"]::-webkit-inner-spin-button,
.num-spin-wrap input[type="number"]::-webkit-outer-spin-button {
    display: none;
}

#transformX::-webkit-inner-spin-button,
#transformX::-webkit-outer-spin-button,
#transformY::-webkit-inner-spin-button,
#transformY::-webkit-outer-spin-button,
#transformAngle::-webkit-inner-spin-button,
#transformAngle::-webkit-outer-spin-button {
    -webkit-appearance: none;
    margin: 0;
}
#transformX, #transformY, #transformAngle {
    -moz-appearance: textfield;
    appearance: textfield;
}

.num-spin-btn {
    flex-shrink: 0;
    width: 2.4rem;
    background: var(--ui-btn-bg);
    border: none;
    color: var(--accent-primary);
    font-size: 1.25rem;
    font-weight: 700;
    cursor: pointer;
    transition: background 0.15s, color 0.15s;
    display: flex;
    align-items: center;
    justify-content: center;
    user-select: none;
    line-height: 1;
}

.num-spin-btn:first-child {
    border-right: 1px solid var(--ui-border-prominent);
}

.num-spin-btn:last-child {
    border-left: 1px solid var(--ui-border-prominent);
}

.num-spin-btn:hover {
    background: var(--accent-primary);
    color: white;
}

.num-spin-btn:active {
    background: var(--accent-secondary);
    color: white;
}

input[type="number"]:focus,
input[type="text"]:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 4px var(--accent-glow);
}

.checkbox-field {
    display: flex;
    align-items: center;
    gap: 1rem;
    cursor: pointer;
}

/* Switch styling */
.switch {
    position: relative;
    display: inline-block;
    width: 50px;
    height: 24px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--ui-switch-bg);
    transition: .4s;
}

.slider:before {
    position: absolute;
    content: "";
    height: 18px;
    width: 18px;
    left: 3px;
    bottom: 3px;
    background-color: var(--ui-switch-knob);
    transition: .4s;
}

input:checked+.slider {
    background-color: var(--accent-primary);
}

input:checked+.slider:before {
    transform: translateX(26px);
}

.slider.round {
    border-radius: 24px;
}

.slider.round:before {
    border-radius: 50%;
}

.primary-btn {
    width: 100%;
    padding: 1.2rem;
    border-radius: 12px;
    border: none;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: white;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    margin-top: 1rem;
}

.primary-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 20px var(--accent-glow);
}

.primary-btn:active {
    transform: translateY(0);
}

.secondary-btn {
    width: 100%;
    padding: 0.65rem 1rem;
    border-radius: 10px;
    border: 1px solid var(--border-color);
    background: var(--ui-btn-bg);
    color: var(--text-primary);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.15s, border-color 0.15s;
    margin-top: 0.5rem;
}

.secondary-btn:hover {
    background: var(--ui-btn-hover);
    border-color: var(--accent-primary);
}

.downloads-section {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

.download-btns {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.secondary-btn {
    background: var(--ui-btn-bg);
    border: 1px solid var(--ui-border-prominent);
    padding: 0.65rem 0.8rem;
    border-radius: 8px;
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.2s;
    text-align: left;
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-size: 0.9rem;
    width: 100%;
}

.secondary-btn span {
    flex: 1;
    text-align: left;
}

.secondary-btn .btn-icon {
    width: 1rem;
    height: 1rem;
    flex-shrink: 0;
    color: var(--accent-primary);
}

.secondary-btn .btn-arrow {
    width: 0.85rem;
    height: 0.85rem;
    flex-shrink: 0;
    color: var(--text-secondary);
    transition: transform 0.2s, color 0.2s;
}

.secondary-btn:hover {
    background: var(--ui-btn-hover);
    border-color: var(--accent-primary);
    transform: translateX(4px);
}

.secondary-btn:hover .btn-arrow {
    transform: translateY(2px);
    color: var(--accent-primary);
}

.save-bulk-row {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.4rem;
    margin-top: 0.75rem;
    overflow: visible;
    isolation: isolate; /* new stacking context so z-index works */
}

.save-bulk-row--single {
    grid-template-columns: 1fr;
}

.save-bulk-btn--full {
    flex-direction: row;
    padding: 0.6rem 1rem;
}

.save-bulk-btn {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.3rem;
    padding: 0.65rem 0.3rem 0.6rem;
    border: 1.5px solid var(--border-color);
    border-radius: 10px;
    background: var(--ui-btn-bg);
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 0.72rem;
    font-weight: 600;
    transition: border-color 0.15s, color 0.15s, background 0.15s, transform 0.15s, box-shadow 0.15s;
    overflow: visible;
}

.save-bulk-btn svg {
    width: 1.2rem;
    height: 1.2rem;
    flex-shrink: 0;
    transition: color 0.15s;
}

.save-bulk-btn span {
    line-height: 1;
    white-space: nowrap;
}

.save-bulk-btn:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
    background: var(--accent-glow);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--accent-glow);
    z-index: 10;
}

.save-bulk-btn--accent {
    border-color: var(--ui-border-prominent);
    background: linear-gradient(135deg, var(--accent-glow), transparent);
    color: var(--accent-primary);
}

.save-bulk-btn--accent:hover {
    background: linear-gradient(135deg, var(--accent-glow), var(--accent-glow));
    box-shadow: 0 4px 16px var(--accent-glow);
}

/* Tooltip */
.save-bulk-tooltip {
    display: none;
    position: absolute;
    bottom: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%);
    min-width: 170px;
    background: light-dark(#ffffff, #1e2535);
    border: 1px solid var(--ui-border-prominent);
    border-radius: 8px;
    padding: 0.55rem 0.7rem;
    box-shadow: 0 8px 28px rgba(0,0,0,0.35);
    pointer-events: none;
    z-index: 100;
    text-align: left;
    white-space: nowrap;
}

.save-bulk-tooltip::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 5px solid transparent;
    border-top-color: light-dark(#ffffff, #1e2535);
}

.save-bulk-btn:hover .save-bulk-tooltip {
    display: block;
}

/* Shift left-edge tooltip right, right-edge tooltip left so they don't clip */
.save-bulk-btn:first-child .save-bulk-tooltip {
    left: 0;
    transform: none;
}
.save-bulk-btn:first-child .save-bulk-tooltip::after {
    left: calc(0.6rem + 10px);
    transform: none;
}
.save-bulk-btn:last-child .save-bulk-tooltip {
    left: auto;
    right: 0;
    transform: none;
}
.save-bulk-btn:last-child .save-bulk-tooltip::after {
    left: auto;
    right: calc(0.6rem + 10px);
    transform: none;
}

.sbt-header {
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.3rem;
    letter-spacing: 0.02em;
}

.sbt-title {
    font-size: 0.72rem;
    font-weight: 700;
    color: var(--accent-primary);
    margin-bottom: 0.35rem;
    letter-spacing: 0.03em;
}

.sbt-file {
    font-size: 0.7rem;
    color: var(--text-secondary);
    font-family: ui-monospace, 'Cascadia Code', monospace;
    padding: 0.08rem 0;
    line-height: 1.5;
}

.sbt-divider {
    height: 1px;
    background: var(--border-color);
    margin: 0.3rem 0;
}



.controls-section {
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    padding-right: 1rem;
}

/* Custom scrollbar */
.controls-section::-webkit-scrollbar {
    width: 6px;
}
.controls-section::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 10px;
}

.visualization-section {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    min-height: 0;
}

.tabs-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
}

.tabs-row-end {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.tabs {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    background: var(--ui-btn-bg);
    padding: 0.3rem;
    border-radius: 10px;
    border: 1px solid var(--ui-border-prominent);
    width: fit-content;
}

.save-all-tab-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.55rem 0.85rem 0.55rem 0.65rem;
    font-size: 0.8rem;
    font-weight: 600;
    color: #fff;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    border: none;
    border-radius: 8px;
    cursor: pointer;
    box-shadow: 0 2px 8px var(--accent-glow);
    transition: box-shadow 0.15s, transform 0.15s;
    white-space: nowrap;
}

.save-all-tab-btn svg {
    width: 1rem;
    height: 1rem;
    flex-shrink: 0;
}

.save-all-tab-btn:hover {
    box-shadow: 0 4px 14px var(--accent-glow);
    transform: translateY(-1px);
}

.save-all-tab-btn:active {
    transform: translateY(0);
    box-shadow: 0 2px 6px var(--accent-glow);
}

.tab-seed-badge {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.3rem 0.4rem 0.3rem 0.75rem;
    background: var(--ui-btn-bg);
    border: 1px solid var(--ui-border-prominent);
    border-radius: 8px;
    white-space: nowrap;
}

.tab-seed-badge .seed-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.tab-seed-badge #displaySeed {
    font-family: 'Courier New', monospace;
    font-weight: 700;
    font-size: 0.8rem;
    color: var(--accent-primary);
    letter-spacing: 0.03em;
    cursor: pointer;
    transition: opacity 0.15s;
}

.tab-seed-badge #displaySeed:hover {
    opacity: 0.7;
}

.tab-seed-badge #copySeedBtn {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0.3rem;
    border: 1px solid var(--ui-border-prominent);
    border-radius: 6px;
    background: transparent;
    cursor: pointer;
    transition: background 0.15s, border-color 0.15s;
}

.tab-seed-badge #copySeedBtn svg {
    width: 1rem;
    height: 1rem;
    color: var(--accent-primary);
    transition: color 0.15s;
}

.tab-seed-badge #copySeedBtn:hover {
    background: var(--ui-btn-hover);
    border-color: var(--accent-primary);
}

.tab-seed-badge #copySeedBtn.copied {
    border-color: var(--success, #4caf50);
    background: color-mix(in srgb, var(--success, #4caf50) 15%, transparent);
}

.tab-seed-badge #copySeedBtn.copied svg {
    color: var(--success, #4caf50);
}

.tab-btn {
    padding: 0.6rem 1.2rem;
    font-size: 0.9rem;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
    font-weight: 500;
}

.tab-btn.active {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: white;
}

.tab-btn:hover:not(.active) {
    background: var(--ui-btn-hover);
    color: var(--text-primary);
}

#btnDLSVG {
    position: absolute;
    top: 0.6rem;
    right: 0.6rem;
    z-index: 10;
    background: var(--panel-bg);
    border: 1px solid var(--ui-border-prominent);
    border-radius: 8px;
    padding: 0.4rem;
    cursor: pointer;
    backdrop-filter: blur(4px);
    transition: background 0.15s, border-color 0.15s;
}

#btnDLSVG:hover {
    background: var(--ui-btn-hover);
    border-color: var(--accent-primary);
}

#btnDLSVG:not(.hidden) {
    display: flex;
    align-items: center;
    justify-content: center;
}

#btnDLSVG svg {
    width: 1.3rem;
    height: 1.3rem;
    color: var(--accent-primary);
    transition: transform 0.2s;
}

#btnDLSVG:hover svg {
    transform: translateY(2px);
}

.canvas-container {
    flex: 1;
    background: var(--viz-bg);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    border: 1px solid var(--border-color);
    overflow: hidden;
    min-height: 0;
    transition: border-color 0.15s, box-shadow 0.15s;
}

.canvas-drop-active {
    border-color: var(--accent-primary) !important;
    box-shadow: inset 0 0 0 2px var(--accent-primary), 0 0 20px var(--accent-glow);
}

/* Empty-state drop hint (evaluate mode, no data) */
.canvas-drop-hint {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.6rem;
    pointer-events: none;
    border: 2px dashed var(--border-color);
    border-radius: 12px;
    color: var(--text-secondary);
}

.canvas-drop-hint svg {
    width: 2.5rem;
    height: 2.5rem;
    opacity: 0.5;
}

.canvas-drop-hint-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.canvas-drop-hint-sub {
    font-size: 0.78rem;
    text-align: center;
    line-height: 1.6;
    color: var(--text-secondary);
}

.canvas-drop-hint-sub code {
    font-family: 'Courier New', monospace;
    font-size: 0.74rem;
    color: var(--accent-primary);
    background: var(--accent-glow);
    padding: 0.05em 0.3em;
    border-radius: 3px;
}

/* Drop overlay shown when dragging over a populated canvas */
.canvas-drop-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    background: rgb(from var(--accent-primary) r g b / 0.12);
    border-radius: 12px;
    pointer-events: none;
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--accent-primary);
}

.canvas-drop-overlay svg {
    width: 2.2rem;
    height: 2.2rem;
}

#mapCanvas {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    transition: opacity 0.25s ease;
}

.map-tooltip {
    position: fixed;
    pointer-events: none;
    z-index: 1000;
    background: light-dark(rgba(255,255,255,0.7), rgba(20,26,46,0.7));
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--ui-border-prominent);
    border-radius: 10px;
    padding: 0.5rem 0.75rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.25);
    min-width: 140px;
    transform: translate(14px, -50%);
    transition: opacity 0.1s;
}

.map-tooltip.hidden {
    opacity: 0;
    pointer-events: none;
}

.map-tooltip--pinned {
    border-color: var(--accent-primary);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.25), 0 0 0 1px var(--accent-primary);
}

.map-tooltip-label {
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--accent-primary);
    margin-bottom: 0.3rem;
}

.map-tooltip-row {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 0.75rem;
    font-size: 0.78rem;
    color: var(--text-secondary);
}

.map-tooltip-row span:last-child {
    font-family: 'Courier New', monospace;
    font-size: 0.8rem;
    color: var(--text-primary);
    font-weight: 600;
}

.legend {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    padding: 0.75rem;
    background: var(--ui-btn-bg);
    border-radius: 10px;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
    cursor: pointer;
    user-select: none;
    transition: opacity 0.15s;
    border-radius: 6px;
    padding: 0.15rem 0.4rem;
}

.legend-item:hover { opacity: 0.7; }

.legend-item.layer-hidden {
    opacity: 0.3;
    text-decoration: line-through;
}

.legend-patch {
    width: 14px;
    height: 14px;
    border-radius: 3px;
}

.legend-hint {
    width: 100%;
    font-size: 0.72rem;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 0.35rem;
    margin-bottom: 0.2rem;
    opacity: 0.65;
}

.legend-hint svg {
    width: 0.85rem;
    height: 0.85rem;
    flex-shrink: 0;
}

.hidden {
    display: none !important;
}

.footer {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-top: 2rem;
}

.small-hint {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.mt-10 { margin-top: 0.625rem; }

.actions { margin-top: 1rem; }

.seed-row {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.seed-row input { flex: 1; }

.seed-badge {
    font-size: 0.8rem;
    color: var(--text-secondary);
    white-space: nowrap;
}

.small-btn {
    background: var(--ui-btn-bg);
    border: 1px solid var(--ui-border-prominent);
    border-radius: 6px;
    padding: 0.3rem 0.6rem;
    color: var(--text-primary);
    font-size: 0.8rem;
    cursor: pointer;
    transition: background 0.2s, border-color 0.2s;
    white-space: nowrap;
}

.small-btn:hover {
    background: var(--ui-btn-hover);
    border-color: var(--accent-primary);
}

/* Hint text */
.hint-text {
    font-size: 0.8rem;
    line-height: 1.55;
    color: var(--text-secondary);
    margin: 0 0 0.75rem;
    padding: 0.6rem 0.75rem;
    background: var(--ui-input-bg);
    border-left: 3px solid var(--accent-primary);
    border-radius: 0 6px 6px 0;
}

.hint-text code {
    font-family: 'Courier New', monospace;
    font-size: 0.78rem;
    color: var(--accent-primary);
    background: var(--accent-glow);
    padding: 0.05em 0.3em;
    border-radius: 3px;
}

.hint-text--warning {
    border-left-color: var(--warning);
}

/* Info tooltip */
.info-tip {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    vertical-align: middle;
    margin-left: 0.3rem;
    cursor: default;
}

.info-tip svg {
    width: 0.95rem;
    height: 0.95rem;
    color: var(--text-secondary);
    transition: color 0.15s;
}

.info-tip:hover svg,
.info-tip:focus svg {
    color: var(--accent-primary);
}

.info-tip .tip-content {
    display: none;
    position: absolute;
    left: 50%;
    top: calc(100% + 10px);
    transform: translateX(-50%);
    width: 260px;
    background: var(--bg-color);
    border: 1px solid var(--ui-border-prominent);
    border-radius: 10px;
    padding: 0.75rem 1rem;
    font-size: 0.82rem;
    font-weight: normal;
    line-height: 1.55;
    color: var(--text-secondary);
    text-align: left;
    z-index: 200;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.18);
    pointer-events: none;
    white-space: normal;
}

.info-tip:hover .tip-content,
.info-tip:focus .tip-content {
    display: block;
}

.divider {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-weight: 600;
    margin: 1.25rem 0;
}

.divider::before,
.divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border-color);
}

.divider .info-tip,
.divider .divider-copy-btn {
    margin-left: 0;
}

.eval-method-switch {
    display: flex;
    background: var(--ui-btn-bg);
    border: 1px solid var(--ui-border-prominent);
    border-radius: 10px;
    padding: 3px;
    margin-bottom: 1.25rem;
}

.eval-method-btn {
    flex: 1;
    padding: 0.45rem 0;
    font-size: 0.85rem;
    font-weight: 500;
    border: none;
    border-radius: 7px;
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    transition: background 0.18s, color 0.18s;
}

.eval-method-btn.active {
    background: var(--ui-btn-hover);
    color: var(--text-primary);
    font-weight: 600;
}

.file-stack {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

.file-stack .input-field {
    margin-bottom: 0;
}

.file-stack .input-field label {
    font-size: 0.78rem;
    margin-bottom: 0.25rem;
}

.file-stack .file-drop-zone {
    min-height: 54px;
    padding: 0.55rem 0.75rem;
    gap: 0.2rem;
}

.file-stack .file-drop-icon {
    width: 1.1rem;
    height: 1.1rem;
}

.file-stack .file-drop-hint {
    font-size: 0.72rem;
}

.file-drop-zone {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.35rem;
    padding: 0.9rem 0.75rem;
    border: 2px dashed var(--ui-border-prominent);
    border-radius: 10px;
    background: var(--ui-input-bg);
    cursor: pointer;
    transition: border-color 0.2s, background 0.2s;
    text-align: center;
    min-height: 80px;
}

.file-drop-zone:hover {
    border-color: var(--accent-primary);
    background: var(--accent-glow);
}

.file-drop-zone.drag-over {
    border-color: var(--accent-primary);
    background: var(--accent-glow);
    animation: drop-zone-pulse 0.8s ease-in-out infinite alternate;
}

@keyframes drop-zone-pulse {
    from { box-shadow: 0 0 0 0 var(--accent-glow); border-color: var(--accent-primary); }
    to   { box-shadow: 0 0 0 6px var(--accent-glow); border-color: var(--accent-secondary); }
}

.file-drop-zone input[type="file"] {
    position: absolute;
    inset: 0;
    opacity: 0;
    cursor: pointer;
    width: 100%;
    height: 100%;
}

.file-drop-icon {
    width: 1.5rem;
    height: 1.5rem;
    color: var(--accent-primary);
    flex-shrink: 0;
    transition: transform 0.2s;
}

.file-drop-zone:hover .file-drop-icon {
    transform: translateY(-2px);
}

.file-drop-zone.drag-over .file-drop-icon {
    animation: drop-icon-bounce 0.5s ease-in-out infinite alternate;
}

@keyframes drop-icon-bounce {
    from { transform: translateY(0); }
    to   { transform: translateY(-6px); }
}

.file-drop-hint {
    font-size: 0.78rem;
    color: var(--text-secondary);
}

.file-drop-name {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--accent-primary);
    word-break: break-all;
    max-width: 100%;
}

.file-drop-zone.has-file {
    border-style: solid;
    border-color: var(--accent-primary);
}

.file-drop-zone.has-file .file-drop-icon,
.file-drop-zone.has-file .file-drop-hint {
    display: none;
}

.eval-results-container {
    margin-bottom: 1rem;
}

.eval-results-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
}

.eval-results-header::before,
.eval-results-header::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border-color);
}

.eval-stats-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.6rem;
    margin-bottom: 0.75rem;
}

.stat-card {
    background: var(--ui-btn-bg);
    padding: 0.75rem 0.6rem;
    border-radius: 10px;
    border: 1px solid var(--border-color);
    text-align: center;
}

.stat-label {
    font-size: 0.68rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 0.3rem;
}

.stat-fraction {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 0.1rem;
    line-height: 1;
}

.stat-value {
    font-size: 1.3rem;
    font-weight: 800;
    color: var(--accent-primary);
}

.stat-total {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.stat-card.stat-success .stat-value { color: var(--success); }
.stat-card.stat-success { border-color: rgb(from var(--success) r g b / 0.3); }

.stat-card.stat-danger .stat-value { color: var(--viz-penalty); }
.stat-card.stat-danger { border-color: rgb(from var(--viz-penalty) r g b / 0.3); }

.stat-card.stat-warning .stat-value { color: var(--warning); }
.stat-card.stat-warning { border-color: rgb(from var(--warning) r g b / 0.3); }

.stat-card.stat-maintained .stat-value { color: var(--viz-match-known); }
.stat-card.stat-maintained { border-color: rgb(from var(--viz-match-known) r g b / 0.3); }

.stat-card.stat-discovered .stat-value { color: var(--viz-match-unknown); }
.stat-card.stat-discovered { border-color: rgb(from var(--viz-match-unknown) r g b / 0.3); }

.stat-card.stat-penalty .stat-value { color: var(--viz-penalty); }
.stat-card.stat-penalty { border-color: rgb(from var(--viz-penalty) r g b / 0.3); }

.verdict-box {
    padding: 0.75rem 1rem;
    border-radius: 10px;
    text-align: center;
    font-weight: 700;
    font-size: 0.95rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.verdict-perfect {
    background: rgb(from var(--success) r g b / 0.1);
    color: var(--success);
    border: 1px solid rgb(from var(--success) r g b / 0.4);
}

.verdict-incomplete {
    background: rgb(from var(--warning) r g b / 0.1);
    color: var(--warning);
    border: 1px solid rgb(from var(--warning) r g b / 0.4);
}

.verdict-penalty {
    background: rgb(from var(--viz-penalty) r g b / 0.08);
    color: var(--viz-penalty);
    border: 1px solid rgb(from var(--viz-penalty) r g b / 0.3);
}

.verdict-accepted {
    background: rgb(from var(--accent-primary) r g b / 0.08);
    color: var(--accent-primary);
    border: 1px solid rgb(from var(--accent-primary) r g b / 0.3);
}

.verdict-failed {
    background: rgb(from var(--viz-penalty) r g b / 0.08);
    color: var(--viz-penalty);
    border: 1px solid rgb(from var(--viz-penalty) r g b / 0.3);
}

.verdict-has-tip {
    position: relative;
    cursor: default;
}

.verdict-tooltip {
    display: none;
    position: absolute;
    bottom: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%);
    background: light-dark(#ffffff, #1a2035);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 0.65rem 0.9rem;
    font-size: 0.78rem;
    font-weight: 400;
    color: var(--text-primary);
    white-space: normal;
    width: 220px;
    pointer-events: none;
    z-index: 50;
    line-height: 1.8;
    text-align: left;
    box-shadow: 0 4px 20px rgba(0,0,0,0.25);
}

.verdict-has-tip:hover .verdict-tooltip {
    display: block;
}

.maintained-warning {
    background: rgb(from var(--viz-penalty) r g b / 0.1);
    border: 1px solid rgb(from var(--viz-penalty) r g b / 0.4);
    color: var(--viz-penalty);
    border-radius: 8px;
    padding: 0.5rem 0.75rem;
    font-size: 0.78rem;
    font-weight: 600;
    margin-bottom: 0.6rem;
    text-align: center;
}

.eval-avg-error {
    font-size: 0.82rem;
    color: var(--text-secondary);
    text-align: center;
    margin-bottom: 0.6rem;
}

.eval-avg-error strong {
    color: var(--text-primary);
}

#evalResultsPanel .divider {
    margin: 0.6rem 0;
    font-size: 0.72rem;
}

.divider-copy-btn {
    background: none;
    border: none;
    padding: 0.1rem 0.2rem;
    margin-left: 0.25rem;
    cursor: pointer;
    vertical-align: middle;
    color: var(--text-secondary);
    border-radius: 4px;
    transition: color 0.15s, background 0.15s;
    display: inline-flex;
    align-items: center;
}
.divider-copy-btn svg { width: 0.85rem; height: 0.85rem; }
.divider-copy-btn:hover { color: var(--accent-primary); background: var(--accent-glow); }
.divider-copy-btn.copied { color: var(--success); }

.eval-results-settings {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.5rem;
    margin-bottom: 0;
}

.eval-setting-field--full {
    grid-column: 1 / -1;
}

.eval-setting-field {
    margin-bottom: 0;
    min-width: 0;
}

.eval-setting-field input {
    width: 100%;
    min-width: 0;
    box-sizing: border-box;
    padding: 0.4rem 0.5rem;
    font-size: 0.85rem;
}

.eval-setting-field label {
    font-size: 0.72rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* ─── Eval Single-File Seed Display ────────────────────────────────────── */
.seed-extracted-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem;
    padding: 0.5rem 0.75rem;
    background: var(--ui-btn-bg);
    border-radius: 8px;
    margin-top: 0.5rem;
}

.seed-extracted-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    flex-shrink: 0;
}

.seed-extracted-row code {
    font-size: 0.78rem;
    color: var(--accent-primary);
    word-break: break-all;
    text-align: right;
}

/* ─── Eval Sidebar Tabs ─────────────────────────────────────────────────── */
.eval-sidebar-tabs {
    display: flex;
    gap: 0;
    margin-bottom: 1.1rem;
    border-bottom: 1.5px solid var(--border-color);
}

.eval-sidebar-tab {
    flex: 1;
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    margin-bottom: -1.5px;
    padding: 0.5rem 0.75rem;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    cursor: pointer;
    transition: color 0.15s, border-color 0.15s;
}

.eval-sidebar-tab.active {
    color: var(--accent-primary);
    border-bottom-color: var(--accent-primary);
}

.eval-sidebar-tab:hover:not(.active) {
    color: var(--text-primary);
}

/* ─── Detailed Results List ─────────────────────────────────────────────── */
#evalResultsPanel {
    overflow-y: visible;
}

.eval-detail-section {
    margin-bottom: 0.9rem;
}

.eval-detail-section-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--text-secondary);
    padding: 0.35rem 0;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 0.2rem;
}

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

.eval-detail-header-row {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.15rem 0.3rem 0.3rem;
    border-bottom: 1px solid var(--ui-border);
    margin-bottom: 0.25rem;
}

.eval-detail-type-hdr,
.eval-detail-x-hdr,
.eval-detail-y-hdr,
.eval-detail-error-hdr {
    flex-shrink: 0;
    font-size: 0.68rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    white-space: nowrap;
}

.eval-detail-type-hdr { width: 2.2rem; }
.eval-detail-error-hdr { width: 4.5rem; text-align: right; padding-left: 0.75rem; box-sizing: border-box; }

.eval-detail-row {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.28rem 0.3rem;
    border-radius: 6px;
    cursor: pointer;
    transition: background 0.1s;
    font-size: 0.8rem;
    line-height: 1.3;
}

.eval-detail-row:hover {
    background: var(--ui-btn-hover);
}

.eval-detail-row.panel-hover-active {
    background: var(--accent-glow);
    outline: 1px solid var(--accent-primary);
}

.eval-detail-type {
    font-size: 0.68rem;
    font-weight: 700;
    padding: 0.1rem 0.28rem;
    border-radius: 3px;
    background: var(--ui-btn-bg);
    color: var(--text-secondary);
    flex-shrink: 0;
    box-sizing: border-box;
    width: 2.2rem;
    text-align: center;
}

.eval-detail-x,
.eval-detail-y,
.eval-detail-x-hdr,
.eval-detail-y-hdr {
    flex: 1;
    text-align: right;
}

.eval-detail-x,
.eval-detail-y {
    color: var(--text-primary);
    font-variant-numeric: tabular-nums;
}

.eval-detail-error {
    font-variant-numeric: tabular-nums;
    font-size: 0.78rem;
    color: var(--text-secondary);
    flex-shrink: 0;
    width: 4.5rem;
    text-align: right;
    padding-left: 0.75rem;
    box-sizing: border-box;
}

.eval-detail-empty {
    color: var(--text-secondary);
    font-size: 0.8rem;
    padding: 1.5rem 0;
    text-align: center;
}

/* ─── Small laptop / short viewport ─────────────────────────────────────── */

@media (min-width: 769px) and (max-height: 820px) {
    .container {
        padding: 0.4rem 1rem;
        gap: 0.35rem;
    }

    .header-section {
        padding: 0.3rem 1.25rem;
    }

    .header-section h1 {
        font-size: 1.4rem;
    }

    .subtitle {
        display: none;
    }

    .mode-toggle-container {
        margin-bottom: 0.25rem;
    }

    .main-grid {
        grid-template-columns: 300px 1fr;
        gap: 0.9rem;
    }

    .control-group {
        margin-bottom: 1rem;
    }

    h3 {
        font-size: 1rem;
        margin-bottom: 0.8rem;
    }

    .glass-panel {
        padding: 0.9rem;
    }

    .controls-section {
        padding-right: 0.5rem;
    }
}

/* ─── Responsive / Mobile ───────────────────────────────────────────────── */

@media (max-width: 768px) {
    body {
        height: auto;
        overflow: auto;
    }

    .container {
        height: auto;
        min-height: 100svh;
        padding: 0.5rem 0.75rem;
        gap: 0.4rem;
    }

    h1 {
        font-size: 1.25rem;
    }

    .subtitle {
        font-size: 0.8rem;
    }

    .header-section {
        padding: 0.4rem 0.75rem;
    }

    .theme-toggle-btn {
        width: 36px;
        height: 36px;
        right: 0.75rem;
        font-size: 1rem;
    }

    .mode-btn {
        padding: 0.6rem 1rem;
        font-size: 0.85rem;
    }

    .mode-toggle-container {
        margin-bottom: 0.3rem;
    }

    .main-grid {
        grid-template-columns: 1fr;
        gap: 0.75rem;
        flex: none;
        min-height: auto;
    }

    /* Controls panel: no scroll, full height */
    .controls-section {
        overflow-y: visible;
        padding-right: 0;
        max-height: none;
    }

    /* Canvas section: fixed height so map is usable */
    .visualization-section {
        height: 70svh;
        min-height: 320px;
    }

    /* Tabs row: wrap on tiny screens */
    .tabs-row {
        flex-wrap: wrap;
    }

    /* Save-bulk buttons: allow text to wrap a bit */
    .save-bulk-btn {
        font-size: 0.68rem;
    }

    /* Tooltips: anchor to left or right edge of button to avoid off-screen */
    .save-bulk-tooltip {
        min-width: 140px;
    }

    /* Legend: tighter */
    .legend {
        gap: 0.6rem;
        padding: 0.5rem;
    }

    .legend-item {
        font-size: 0.8rem;
    }

    /* Eval stats: 2-col stays fine on most phones, but go 1-col if very narrow */
    @media (max-width: 400px) {
        .eval-stats-grid {
            grid-template-columns: 1fr;
        }
    }

    /* Info-tip tooltip: ensure it doesn't overflow on mobile */
    .info-tip .tip-content {
        width: min(260px, 90vw);
        left: auto;
        right: 0;
        transform: none;
    }

    /* Verdict tooltip: keep within screen */
    .verdict-tooltip {
        width: min(220px, 85vw);
        left: auto;
        right: 0;
        transform: none;
    }
}

/* ─── Focus-visible accessibility ──────────────────────────────────────── */
:focus-visible {
    outline: 2px solid var(--accent-primary);
    outline-offset: 2px;
}
button:focus:not(:focus-visible) { outline: none; }

/* ─── Canvas control buttons ────────────────────────────────────────────── */
.canvas-ctrl-btn {
    position: absolute;
    top: 0.6rem;
    left: 0.6rem;
    z-index: 10;
    background: var(--panel-bg);
    border: 1px solid var(--ui-border-prominent);
    border-radius: 8px;
    padding: 0.4rem;
    cursor: pointer;
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.15s, border-color 0.15s;
}
.canvas-ctrl-btn:not(.hidden) { display: flex; }
.canvas-ctrl-btn:hover { background: var(--ui-btn-hover); border-color: var(--accent-primary); }
.canvas-ctrl-btn svg { width: 1.3rem; height: 1.3rem; color: var(--accent-primary); }

/* ─── Recent seeds ──────────────────────────────────────────────────────── */
.recent-seeds-label {
    font-size: 0.72rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 0.3rem;
}
.recent-seeds-list {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}
.recent-seed-btn {
    background: var(--ui-btn-bg);
    border: 1px solid var(--ui-border-prominent);
    border-radius: 6px;
    padding: 0.3rem 0.6rem;
    font-size: 0.72rem;
    font-family: 'Courier New', monospace;
    color: var(--text-secondary);
    cursor: pointer;
    text-align: left;
    transition: background 0.15s, border-color 0.15s, color 0.15s;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.recent-seed-btn:hover {
    background: var(--accent-glow);
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}

/* ─── Eval history ──────────────────────────────────────────────────────── */
.eval-history-list {
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
    margin-bottom: 0.5rem;
}
.history-item {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.28rem 0.4rem;
    border-radius: 6px;
    font-size: 0.75rem;
    background: var(--ui-btn-bg);
    cursor: pointer;
    transition: background 0.15s, transform 0.1s;
}
.history-item:hover { background: var(--ui-btn-hover); transform: translateX(2px); }
.history-item--current {
    background: var(--accent-glow) !important;
    border-left: 4px solid var(--accent-primary) !important;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
    transform: translateX(4px);
}
.history-time-main {
    flex: 1;
    color: var(--text-primary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.history-seed-info {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    color: var(--text-secondary);
    opacity: 0.6;
    flex-shrink: 0;
}
.history-verdict { font-weight: 700; flex-shrink: 0; min-width: 60px; text-align: right; margin-left: auto; }
.history-verdict--perfect { color: var(--success); }
.history-verdict--accepted { color: var(--accent-primary); }
.history-verdict--failed { color: var(--viz-penalty); }

.history-remove-btn {
    background: none;
    border: none;
    padding: 2px;
    cursor: pointer;
    color: var(--text-secondary);
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.15s, color 0.15s, background 0.15s;
}
.history-item:hover .history-remove-btn { opacity: 1; }
.history-remove-btn:hover { background: var(--error); color: white; }
.history-remove-btn svg { width: 0.85rem; height: 0.85rem; }

.recent-seed-container {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    width: 100%;
}
.recent-seed-hash {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    color: var(--text-secondary);
    opacity: 0.6;
    flex-shrink: 0;
}

/* ─── Modals (shortcuts + QR) ─────────────────────────────────────────────── */

.modal-backdrop {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.55);
    backdrop-filter: blur(4px);
}
.modal-backdrop.hidden { display: none !important; }

.modal-card {
    background: var(--panel-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    box-shadow: 0 24px 48px rgba(0,0,0,0.35);
    min-width: 280px;
    max-width: 90vw;
    overflow: hidden;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.85rem 1rem 0.75rem;
    font-weight: 600;
    font-size: 0.95rem;
    border-bottom: 1px solid var(--border-color);
}

.modal-close-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.3rem;
    line-height: 1;
    cursor: pointer;
    padding: 0 0.2rem;
    transition: color 0.15s;
}
.modal-close-btn:hover { color: var(--text-primary); }

/* Shortcuts modal */
.shortcuts-modal { min-width: 320px; }
.shortcuts-table {
    width: 100%;
    border-collapse: collapse;
    padding: 0.5rem 0;
}
.shortcuts-table td {
    padding: 0.35rem 1rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
}
.shortcuts-table td:first-child { white-space: nowrap; }
.shortcuts-table tr:last-child td { padding-bottom: 0.85rem; }

kbd {
    display: inline-block;
    padding: 0.1em 0.4em;
    font-size: 0.8em;
    font-family: 'Courier New', monospace;
    background: var(--ui-btn-bg);
    border: 1px solid var(--ui-border-prominent);
    border-radius: 4px;
    box-shadow: 0 1px 0 var(--ui-border-prominent);
    color: var(--text-primary);
    line-height: 1.4;
}

/* QR modal */
.qr-modal { text-align: center; }
.qr-code-container {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.25rem 1.25rem 0.5rem;
    background: #fff;
    margin: 1rem 1rem 0;
    border-radius: 8px;
}
.qr-code-container canvas,
.qr-code-container img { display: block; }
.qr-link-row {
    display: flex;
    justify-content: center;
    margin: 0.5rem 1rem 1rem;
}

.qr-copy-link-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.45rem 0.9rem;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--accent-primary);
    background: var(--ui-btn-bg);
    border: 1px solid var(--ui-border-prominent);
    border-radius: 8px;
    cursor: pointer;
    transition: background 0.15s, border-color 0.15s, color 0.15s;
}

.qr-copy-link-btn svg {
    width: 0.9rem;
    height: 0.9rem;
    flex-shrink: 0;
}

.qr-copy-link-btn:hover {
    background: var(--ui-btn-hover);
    border-color: var(--accent-primary);
}

.qr-copy-link-btn.copied {
    color: var(--success, #4caf50);
    border-color: var(--success, #4caf50);
    background: color-mix(in srgb, var(--success, #4caf50) 15%, transparent);
}

/* QR seed button */
#qrSeedBtn {
    background: none;
    border: none;
    color: inherit;
    opacity: 0.7;
    cursor: pointer;
    padding: 2px 3px;
    line-height: 0;
    transition: opacity 0.15s;
}
#qrSeedBtn:hover { opacity: 1; }
#qrSeedBtn svg { width: 14px; height: 14px; }

/* ─── Seed lock button ─────────────────────────────────────────────────────── */

.seed-input-row {
    display: flex;
    gap: 0.4rem;
    align-items: center;
}
.seed-input-row input {
    flex: 1;
    min-width: 0;
}

.seed-lock-btn {
    flex-shrink: 0;
    width: 34px;
    height: 34px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--ui-btn-bg);
    border: 1px solid var(--ui-border-prominent);
    border-radius: 8px;
    cursor: pointer;
    color: var(--text-secondary);
    transition: background 0.15s, border-color 0.15s, color 0.15s;
    padding: 0;
}
.seed-lock-btn svg { width: 18px; height: 18px; }
.seed-lock-btn .icon-lock { display: none; }
.seed-lock-btn .icon-unlock { display: block; }
.seed-lock-btn.locked { background: var(--accent-glow); border-color: var(--accent-primary); color: var(--accent-primary); }
.seed-lock-btn.locked .icon-lock { display: block; }
.seed-lock-btn.locked .icon-unlock { display: none; }
.seed-lock-btn:hover { background: var(--ui-btn-hover); border-color: var(--accent-primary); }

/* ─── Canvas control button positioning ────────────────────────────────────── */

#btnGridToggle  { top: 0.6rem; left: 0.6rem; }
#btnResetViewport { top: calc(0.6rem + 2.4rem + 0.4rem); left: 0.6rem; }
#btnCopyCanvas  { top: calc(0.6rem + 2.4rem + 0.4rem); left: auto; right: 0.6rem; }
.canvas-ctrl-btn.active { background: var(--accent-glow); border-color: var(--accent-primary); }
.canvas-ctrl-btn.active svg { color: var(--accent-primary); }
.canvas-ctrl-btn.copied { border-color: var(--success); }
.canvas-ctrl-btn.copied svg { color: var(--success); }

/* ─── Verdict badge animation ──────────────────────────────────────────────── */

@keyframes verdictPulse {
    0%   { transform: scale(0.88); opacity: 0.6; }
    55%  { transform: scale(1.05); opacity: 1; }
    100% { transform: scale(1);    opacity: 1; }
}
.verdict-box.verdict-pulse { animation: verdictPulse 0.4s cubic-bezier(0.34, 1.56, 0.64, 1) both; }

/* ─── QR modal — larger ────────────────────────────────────────────────────── */

.qr-modal { min-width: 460px; }
.qr-code-container { padding: 1.5rem 1.5rem 0.75rem; margin: 1rem 1rem 0; }

/* ─── Two-dice icon: front die occlusion ───────────────────────────────────── */

.die-face-bg { fill: var(--ui-btn-bg); }
.transform-icon-btn:hover .die-face-bg { fill: var(--ui-btn-hover); }
.transform-icon-btn.locked .die-face-bg { fill: var(--accent-glow); }
#resampleObsBtn:hover .die-face-bg { fill: var(--ui-btn-hover); }
#generateBtn .die-face-bg { fill: var(--accent-primary); }

/* ─── Transform header row ─────────────────────────────────────────────────── */

.transform-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.5rem;
}

.transform-header h3 {
    margin: 0;
}

.transform-header-actions {
    display: flex;
    align-items: center;
    gap: 0.35rem;
}

.transform-icon-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 26px;
    height: 26px;
    flex-shrink: 0;
    border-radius: 6px;
    border: 1px solid var(--ui-border-prominent);
    background: var(--ui-btn-bg);
    color: var(--text-secondary);
    cursor: pointer;
    transition: background 0.15s, border-color 0.15s, color 0.15s;
    padding: 0;
}

.transform-icon-btn svg {
    width: 14px;
    height: 14px;
    pointer-events: none;
}

.transform-icon-btn:hover {
    background: var(--ui-btn-hover);
    border-color: var(--accent-primary);
    color: var(--text-primary);
}

.transform-icon-btn.locked {
    background: var(--accent-glow);
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}

.transform-icon-btn .icon-lock { display: none; }
.transform-icon-btn .icon-unlock { display: block; }
.transform-icon-btn.locked .icon-lock { display: block; }
.transform-icon-btn.locked .icon-unlock { display: none; }

/* ─── Generate mode: compact sidebar ───────────────────────────────────────── */

#generateControls .control-group {
    margin-bottom: 1.1rem;
}

#generateControls .control-group h3 {
    font-size: 0.72rem;
    margin-bottom: 0.5rem;
}

#generateControls .input-row {
    gap: 0.5rem;
    margin-bottom: 0.5rem;
}

#generateControls .input-field {
    gap: 0.25rem;
}

#generateControls .input-field label,
#evaluateControls .input-field label {
    font-size: 0.72rem;
}

#generateControls .input-field input,
#evaluateControls .input-field input {
    padding: 0.4rem 0.5rem;
    font-size: 0.85rem;
}

#generateControls .primary-btn {
    padding: 0.75rem;
    margin-top: 0.5rem;
}

#generateControls .secondary-btn {
    padding: 0.5rem 0.8rem;
    margin-top: 0.35rem;
}

#resampleObsBtn {
    margin-top: 0 !important;
    padding: 0 !important;
    width: 34px !important;
    align-self: stretch;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

#resampleObsBtn svg {
    width: 15px;
    height: 15px;
    pointer-events: none;
}

#obstaclesRow {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 0.4rem;
    align-items: stretch;
}

#obstaclesRow .num-spin-wrap {
    margin: 0;
}

#generateControls .actions {
    margin-top: 0.5rem;
}

#generateControls .num-spin-wrap input {
    padding: 0.4rem 0.5rem;
    font-size: 0.85rem;
}

#generateControls .num-spin-btn {
    width: 1.6rem;
    font-size: 1rem;
}