/* Reset & Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Colors: Minimalist palette */
    --bg: #FAFAFA;
    --fg: #1A1A1A;
    --border: #E0E0E0;
    --accent: #4ECDC4;
    --muted: #757575;
    --highlight: #FF6B6B;

    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;

    /* Typography */
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
    --font-mono: 'SF Mono', 'Monaco', 'Inconsolata', 'Courier New', monospace;
}

body {
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.6;
    color: var(--fg);
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
}

/* Container */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--space-lg);
}

/* Header */
header {
    margin-bottom: var(--space-xl);
    border-bottom: 1px solid var(--border);
    padding-bottom: var(--space-md);
}

header h1 {
    font-size: 2.5rem;
    font-weight: 300;
    letter-spacing: 0.1em;
    color: var(--fg);
}

header p {
    font-size: 0.875rem;
    color: var(--muted);
    margin-top: var(--space-xs);
}

/* Grid Layout */
.grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-lg);
}

@media (min-width: 768px) {
    .grid {
        grid-template-columns: 1fr 2fr;
        grid-template-rows: auto auto;
    }

    .controls {
        grid-column: 1;
        grid-row: 1 / 3;
    }

    .viewer {
        grid-column: 2;
        grid-row: 1;
    }

    .stats {
        grid-column: 2;
        grid-row: 2;
    }
}

@media (min-width: 1200px) {
    .grid {
        grid-template-columns: 1fr 2fr 1fr;
        grid-template-rows: 1fr;
    }

    .controls {
        grid-column: 1;
        grid-row: 1;
    }

    .viewer {
        grid-column: 2;
        grid-row: 1;
    }

    .stats {
        grid-column: 3;
        grid-row: 1;
    }
}

/* Panel */
.panel {
    background: white;
    border: 1px solid var(--border);
    padding: var(--space-lg);
}

.panel h2 {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--muted);
    margin-bottom: var(--space-md);
}

/* Actions */
.actions {
    display: flex;
    gap: var(--space-xs);
    margin-bottom: var(--space-md);
}

/* Buttons */
.btn, .btn-secondary {
    padding: var(--space-xs) var(--space-sm);
    border: 1px solid var(--border);
    background: white;
    color: var(--fg);
    font-size: 0.875rem;
    font-family: var(--font-sans);
    cursor: pointer;
    transition: all 0.15s ease;
}

.btn:hover {
    background: var(--fg);
    color: white;
    border-color: var(--fg);
}

.btn-secondary:hover {
    background: var(--bg);
}

.btn:active, .btn-secondary:active {
    transform: translateY(1px);
}

/* Gene Controls */
.gene-controls {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

.gene-control {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.gene-control label {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.gene-control .value {
    font-family: var(--font-mono);
    color: var(--fg);
    font-size: 0.875rem;
    min-width: 4rem;
    text-align: right;
}

.gene-control input[type="range"] {
    width: 100%;
    height: 2px;
    background: var(--border);
    outline: none;
    -webkit-appearance: none;
}

.gene-control input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 14px;
    height: 14px;
    background: var(--fg);
    cursor: pointer;
    border-radius: 50%;
}

.gene-control input[type="range"]::-moz-range-thumb {
    width: 14px;
    height: 14px;
    background: var(--fg);
    cursor: pointer;
    border-radius: 50%;
    border: none;
}

.gene-control input[type="range"]:focus::-webkit-slider-thumb {
    background: var(--accent);
}

.gene-control input[type="range"]:focus::-moz-range-thumb {
    background: var(--accent);
}

/* Genome I/O */
.genome-io {
    border-top: 1px solid var(--border);
    padding-top: var(--space-md);
}

.genome-io label {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
    margin-bottom: var(--space-sm);
}

.genome-io label span {
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--muted);
}

.genome-io textarea {
    width: 100%;
    padding: var(--space-sm);
    border: 1px solid var(--border);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    resize: vertical;
    background: var(--bg);
}

.genome-io textarea:focus {
    outline: none;
    border-color: var(--accent);
}

/* Viewer */
.canvas-container {
    position: relative;
    width: 100%;
    aspect-ratio: 3/4;
    background: var(--bg);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

#morphology-img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    opacity: 0;
    transition: opacity 0.2s ease;
}

#morphology-img.loaded {
    opacity: 1;
}

.loading {
    position: absolute;
    font-size: 0.875rem;
    color: var(--muted);
    font-family: var(--font-mono);
}

.loading.hidden {
    display: none;
}

/* Bezier Overlay */
.bezier-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: visible;
    z-index: 5;
}

.bezier-overlay .bz-handle {
    cursor: grab;
    transition: r 0.1s ease;
}

.bezier-overlay .bz-handle:hover {
    r: 0.016;
}

.bezier-overlay .bz-handle.dragging {
    cursor: grabbing;
    r: 0.018;
}

/* Stats */
.stats dl {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: var(--space-sm) var(--space-md);
}

.stats dt {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.stats dd {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--fg);
    text-align: right;
}

/* Evolution Browser */
.evolution-browser.full-width {
    grid-column: 1 / -1;
}

.evo-controls {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-bottom: var(--space-md);
    flex-wrap: wrap;
}

.evo-gen-select {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.evo-gen-select label {
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--muted);
    white-space: nowrap;
}

.evo-gen-select select {
    padding: var(--space-xs) var(--space-sm);
    border: 1px solid var(--border);
    background: white;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--fg);
    cursor: pointer;
}

#log-select {
    min-width: 200px;
}

#gen-select {
    min-width: 320px;
}

#sim-frames {
    padding: var(--space-xs) var(--space-sm);
    border: 1px solid var(--border);
    background: white;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--fg);
    cursor: pointer;
}

.evo-gen-select select:focus {
    outline: none;
    border-color: var(--accent);
}

.evo-status {
    font-size: 0.75rem;
    color: var(--muted);
    font-family: var(--font-mono);
}

/* Convergence Chart */
.convergence-chart-wrap {
    margin-bottom: var(--space-md);
    border: 1px solid var(--border);
    background: white;
}

.convergence-chart-wrap.hidden {
    display: none;
}

#convergence-chart {
    display: block;
    width: 100%;
    height: 200px;
}

/* Individual Table */
.evo-table-wrap {
    overflow-x: auto;
    margin-bottom: var(--space-md);
}

.evo-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.8rem;
}

.evo-table thead th {
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--muted);
    text-align: left;
    padding: var(--space-xs) var(--space-sm);
    border-bottom: 1px solid var(--border);
}

.evo-table tbody td {
    padding: var(--space-xs) var(--space-sm);
    border-bottom: 1px solid var(--border);
    color: var(--fg);
}

.evo-table tbody td.mono {
    font-family: var(--font-mono);
    font-size: 0.8rem;
}

.evo-table tbody tr:hover {
    background: var(--bg);
}

.evo-table tbody tr.best td {
    font-weight: 600;
}

.evo-table tbody tr.best td:nth-child(2) {
    color: var(--accent);
}

.evo-empty {
    text-align: center;
    color: var(--muted);
    padding: var(--space-lg) !important;
    font-style: italic;
}

.btn-load-ind {
    padding: 2px 8px;
    border: 1px solid var(--border);
    background: white;
    color: var(--fg);
    font-size: 0.7rem;
    font-family: var(--font-sans);
    cursor: pointer;
    transition: all 0.15s ease;
}

.btn-load-ind:hover {
    background: var(--fg);
    color: white;
    border-color: var(--fg);
}

/* Grid Viewer */
.evo-grid-container {
    position: relative;
    width: 100%;
    background: var(--bg);
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 200px;
}

.evo-grid-container.hidden {
    display: none;
}

#evo-grid-img {
    width: 100%;
    max-width: 1200px;
    height: auto;
    opacity: 0;
    transition: opacity 0.3s ease;
}

/* Simulation Progress */
.sim-progress {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin-top: var(--space-sm);
}

.sim-progress.hidden {
    display: none;
}

.sim-progress-bar {
    flex: 1;
    max-width: 300px;
    height: 4px;
    background: var(--border);
    overflow: hidden;
}

.sim-progress-fill {
    height: 100%;
    width: 0%;
    background: var(--accent);
    transition: width 0.3s ease;
}

#sim-progress-text {
    font-size: 0.75rem;
    font-family: var(--font-mono);
    color: var(--muted);
    white-space: nowrap;
}

/* Video Player */
.evo-video-container {
    margin-top: var(--space-md);
}

.evo-video-container.hidden {
    display: none;
}

.evo-video-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-sm);
}

#evo-video-label {
    font-size: 0.75rem;
    font-family: var(--font-mono);
    color: var(--muted);
}

#evo-video {
    width: 100%;
    max-width: 1200px;
    background: #000;
}

/* Footer */
footer {
    margin-top: var(--space-xl);
    padding-top: var(--space-lg);
    border-top: 1px solid var(--border);
    text-align: center;
}

footer p {
    font-size: 0.75rem;
    color: var(--muted);
}

/* Mobile Optimizations */
@media (max-width: 767px) {
    .container {
        padding: var(--space-sm);
    }

    header h1 {
        font-size: 1.75rem;
    }

    .panel {
        padding: var(--space-md);
    }

    .actions {
        flex-wrap: wrap;
    }
}

/* ── Navigation ── */
.header-top {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: var(--space-md);
}

.site-nav {
    display: flex;
    gap: var(--space-xs);
    flex-shrink: 0;
    margin-top: 0.3rem;
}

.nav-link {
    padding: 0.3rem 0.75rem;
    border: 1px solid var(--border);
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--muted);
    text-decoration: none;
    transition: all 0.15s ease;
    white-space: nowrap;
}

.nav-link:hover, .nav-link.active {
    background: var(--fg);
    color: white;
    border-color: var(--fg);
}

/* ── Custom page: tighter header, no bottom rule ── */
.custom-page header {
    margin-bottom: var(--space-md);
    border-bottom: none;
    padding-bottom: 0;
}

.custom-page header h1 {
    font-size: 1.6rem;
}

/* ── Step row: dots + title + subtitle on one line ── */
.step-row {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-md);
    padding-bottom: var(--space-sm);
    border-bottom: 1px solid var(--border);
    flex-wrap: wrap;
}

.step-dots {
    display: flex;
    gap: 0.35rem;
    align-items: center;
    flex-shrink: 0;
}

.step-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--border);
    transition: background 0.2s ease, width 0.1s, height 0.1s;
}

.step-dot.done { background: var(--muted); }

.step-dot.active {
    background: var(--accent);
    width: 10px;
    height: 10px;
}

.step-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--fg);
    flex-shrink: 0;
}

.step-sub {
    font-size: 0.78rem;
    color: var(--muted);
}

/* ── Wizard steps ── */
.wizard-step { display: none; }
.wizard-step.active { display: block; }

/* ── 3-column layout: controls | viewer | aquarium ── */
.custom-layout {
    display: grid;
    grid-template-columns: 260px 1fr 200px;
    gap: var(--space-md);
    align-items: start;
    margin-bottom: var(--space-md);
}

@media (max-width: 1100px) {
    .custom-layout {
        grid-template-columns: 240px 1fr;
    }
    .aquarium-col {
        grid-column: 1 / -1;
    }
    .aquarium-col .aquarium-grid {
        grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
        max-height: none;
    }
}

@media (max-width: 700px) {
    .custom-layout { grid-template-columns: 1fr; }
    .aquarium-col  { grid-column: 1; }
}

/* ── Custom controls: compact gene sliders ── */
.custom-controls .gene-controls {
    gap: 0.35rem;
    margin-bottom: var(--space-sm);
}

.custom-controls .gene-control label {
    font-size: 0.7rem;
}

.custom-controls .gene-control .value {
    font-size: 0.78rem;
}

/* ── Custom viewer: square container matches the square Python render ── */
.custom-viewer .canvas-container {
    aspect-ratio: 1/1;
    width: 100%;
    position: relative;
}

/* Name field floating over the top of the preview */
.name-overlay {
    position: absolute;
    top: var(--space-sm);
    left: var(--space-sm);
    right: var(--space-sm);
    z-index: 10;
    background: rgba(250, 250, 250, 0.88);
    border: 1px solid rgba(0, 0, 0, 0.14);
    padding: 0.45rem 0.7rem;
    font-size: 1rem;
    font-family: var(--font-sans);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    width: calc(100% - 2 * var(--space-sm));
}

.name-overlay:focus {
    outline: none;
    border-color: var(--accent);
    background: rgba(255, 255, 255, 0.96);
}

.name-overlay::placeholder {
    color: var(--muted);
    font-style: italic;
}

.name-hint-below {
    display: block;
    font-size: 0.72rem;
    color: var(--highlight);
    margin-top: 0.2rem;
    min-height: 1em;
}

/* ── Aquarium column ── */
.aquarium-col {
    display: flex;
    flex-direction: column;
    max-height: 480px;
    overflow: hidden;
}

.aquarium-col h2 {
    flex-shrink: 0;
}

.aquarium-count {
    font-size: 0.75rem;
    color: var(--muted);
    font-weight: 400;
    margin-left: 0.2rem;
}

.aquarium-desc {
    font-size: 0.72rem;
    color: var(--muted);
    margin-bottom: 0.5rem;
    flex-shrink: 0;
}

.aquarium-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.4rem;
    overflow-y: auto;
    flex: 1;
    min-height: 0;
    align-content: start;
}

.aquarium-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.2rem;
}

.aquarium-item img {
    width: 100%;
    aspect-ratio: 3/4;
    object-fit: contain;
    border: 1px solid var(--border);
    background: var(--bg);
    transition: border-color 0.15s ease;
}

.aquarium-item img:hover { border-color: var(--accent); }

.aquarium-item figcaption {
    font-size: 0.65rem;
    color: var(--fg);
    text-align: center;
    word-break: break-word;
    line-height: 1.2;
}

.aquarium-empty {
    color: var(--muted);
    font-size: 0.8rem;
    font-style: italic;
    grid-column: 1 / -1;
    padding: var(--space-sm) 0;
}

/* ── Color pickers below gene sliders ── */
.controls-colors {
    border-top: 1px solid var(--border);
    padding-top: var(--space-sm);
    margin-top: var(--space-xs);
    display: flex;
    gap: var(--space-sm);
}

.controls-colors .form-field {
    flex: 1;
    margin-bottom: 0;
}

/* ── Shared form elements ── */
.form-field {
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
    margin-bottom: var(--space-sm);
}

.form-field label {
    font-size: 0.72rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--muted);
}

.form-field input[type="text"],
.form-field input[type="email"] {
    padding: 0.45rem var(--space-sm);
    border: 1px solid var(--border);
    font-family: var(--font-sans);
    font-size: 0.9rem;
    background: var(--bg);
    width: 100%;
}

.form-field input[type="text"]:focus,
.form-field input[type="email"]:focus {
    outline: none;
    border-color: var(--accent);
}

.required { color: var(--highlight); }

.optional-label {
    font-size: 0.72rem;
    color: var(--muted);
    font-weight: 400;
    text-transform: none;
    letter-spacing: 0;
}

.field-hint {
    font-size: 0.72rem;
    color: var(--highlight);
    min-height: 1em;
}

.color-row {
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.color-row input[type="color"] {
    width: 36px;
    height: 28px;
    border: 1px solid var(--border);
    cursor: pointer;
    padding: 2px;
    background: white;
}

.color-label {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--muted);
}

/* ── Wizard nav ── */
.wizard-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: var(--space-md);
    padding-top: var(--space-sm);
    border-top: 1px solid var(--border);
}

.wizard-nav--center { justify-content: center; }

.btn-primary {
    background: var(--fg);
    color: white;
    border-color: var(--fg);
    padding: 0.55rem 1.2rem;
    font-size: 0.9rem;
}

.btn-primary:hover {
    background: #333;
    border-color: #333;
    color: white;
}

.btn-submit {
    font-size: 0.95rem;
    padding: 0.65rem 1.5rem;
}

/* ── Email step ── */
.step-form-panel { max-width: 520px; }

.email-pitch {
    background: #F0F9F8;
    border-left: 3px solid var(--accent);
    padding: var(--space-md);
    margin-bottom: var(--space-md);
    font-size: 0.9rem;
    line-height: 1.7;
}

/* ── Results / Step 3 ── */
.results-grid {
    display: grid;
    grid-template-columns: 220px 1fr;
    gap: var(--space-lg);
    align-items: start;
}

@media (max-width: 700px) {
    .results-grid { grid-template-columns: 1fr; }
}

.results-preview {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
}

.canvas-container--small {
    width: 100%;
    aspect-ratio: 3/4;
    background: var(--bg);
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.canvas-container--small img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.result-name {
    font-size: 1rem;
    font-weight: 400;
    color: var(--fg);
    text-align: center;
}

/* ── Prediction panel ── */
.prediction-panel { border-left: 3px solid var(--accent); }

.prediction-stat {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    padding: 0.4rem 0;
    border-bottom: 1px solid var(--border);
}

.pred-label {
    font-size: 0.72rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--muted);
}

.pred-value {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--fg);
    text-align: right;
}

.percentile-bar-wrap { padding: 0.5rem 0; }

.percentile-bar {
    width: 100%;
    height: 5px;
    background: var(--border);
    border-radius: 3px;
    overflow: hidden;
}

.percentile-fill {
    height: 100%;
    background: var(--accent);
    border-radius: 3px;
    transition: width 0.6s ease;
    width: 0%;
}

.prediction-disclaimer {
    margin-top: var(--space-sm);
    font-size: 0.72rem;
    color: var(--muted);
    font-style: italic;
    line-height: 1.6;
}

.hidden { display: none !important; }