/****************************************************************
 * Copyright 2026 Spencer Williams
 * Use of this source code is governed by an MIT license:
 * https://github.com/sw23/fp-conv/blob/main/LICENSE
 *
 * Standalone stylesheet for format documentation pages.
 ****************************************************************/

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

html {
    scroll-behavior: smooth;
}

:root {
    --primary-color: #2563eb;
    --secondary-color: #3b82f6;
    --background: #f8fafc;
    --surface: #ffffff;
    --text-primary: #0f172a;
    --text-secondary: #64748b;
    --border: #e2e8f0;
    --sign-color: #ef4444;
    --exponent-color: #3b82f6;
    --mantissa-color: #10b981;
    --integer-color: #8b5cf6;
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: var(--background);
    color: var(--text-primary);
    padding: 5px 20px;
    line-height: 1.6;
    font-size: 0.95rem;
}

/* ── Layout ────────────────────────────────────────────────── */
.container {
    max-width: 900px;
    margin: 0 auto;
}

/* ── Navigation ────────────────────────────────────────────── */
.format-nav {
    background: var(--surface);
    border-radius: 12px;
    box-shadow: var(--shadow);
    padding: 12px 20px;
    margin-bottom: 20px;
}

.format-nav .back-link {
    display: inline-block;
    margin-bottom: 8px;
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
}

.format-nav .back-link:hover {
    text-decoration: underline;
}

.nav-groups {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    align-items: baseline;
}

.nav-group {
    display: flex;
    align-items: baseline;
    gap: 4px;
    flex-wrap: wrap;
}

.nav-group-label {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-right: 2px;
    white-space: nowrap;
}

.nav-link {
    display: inline-block;
    padding: 4px 8px;
    border-radius: 6px;
    font-size: 0.8rem;
    font-weight: 600;
    font-family: 'Courier New', monospace;
    text-decoration: none;
    color: var(--text-primary);
    border: 1px solid var(--border);
    transition: all 0.15s ease;
    white-space: nowrap;
}

.nav-link:hover {
    border-color: var(--primary-color);
    background: var(--primary-color);
    color: #fff;
}

.nav-link.active {
    background: var(--primary-color);
    color: #fff;
    border-color: var(--primary-color);
    box-shadow: var(--shadow);
}


/* ── Header ────────────────────────────────────────────────── */
header {
    text-align: center;
    padding-bottom: 10px;
}

header h1 {
    font-size: 2rem;
    color: var(--primary-color);
    margin-top: 6px;
    margin-bottom: 6px;
}

header .subtitle {
    color: var(--text-secondary);
    font-size: 1.05rem;
    margin-bottom: 8px;
}

/* ── Content Sections ──────────────────────────────────────── */
.doc-section {
    background: var(--surface);
    border-radius: 12px;
    box-shadow: var(--shadow);
    padding: 25px;
    margin-bottom: 20px;
}

.doc-section h2 {
    font-size: 1.4rem;
    color: var(--text-primary);
    margin-bottom: 16px;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--border);
}

.doc-section h3 {
    font-size: 1.1rem;
    color: var(--text-primary);
    margin: 16px 0 8px;
}

.doc-section p {
    margin-bottom: 12px;
    color: var(--text-primary);
}

.doc-section ul, .doc-section ol {
    padding-left: 24px;
    margin-bottom: 12px;
}

.doc-section li {
    margin-bottom: 6px;
}

.doc-section a {
    color: var(--primary-color);
    text-decoration: none;
}

.doc-section a:hover {
    text-decoration: underline;
}

.doc-section code {
    font-family: 'Courier New', monospace;
    background: #f1f5f9;
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.9em;
}

/* ── Bit Layout Diagram ───────────────────────────────────── */
.bit-layout {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 3px;
    margin: 16px 0;
}

.bit-field {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.bit-field-label {
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 4px;
    white-space: nowrap;
}

.bit-field-boxes {
    display: flex;
    gap: 2px;
}

.bit-box {
    width: 22px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    font-size: 0.75rem;
    font-weight: 700;
    color: #fff;
}

.bit-field.sign .bit-field-label { color: var(--sign-color); }
.bit-field.sign .bit-box { border-color: var(--sign-color); background: var(--sign-color); }

.bit-field.exponent .bit-field-label { color: var(--exponent-color); }
.bit-field.exponent .bit-box { border-color: var(--exponent-color); background: var(--exponent-color); }

.bit-field.mantissa .bit-field-label { color: var(--mantissa-color); }
.bit-field.mantissa .bit-box { border-color: var(--mantissa-color); background: var(--mantissa-color); }

.bit-field.integer .bit-field-label { color: var(--integer-color); }
.bit-field.integer .bit-box { border-color: var(--integer-color); background: var(--integer-color); }

.bit-field-width {
    font-size: 0.7rem;
    color: var(--text-secondary);
    margin-top: 4px;
    font-weight: 600;
}

/* For large formats, collapse to show count instead of individual boxes */
.bit-field-collapsed {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.bit-field-collapsed .bit-field-label {
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 4px;
}

.bit-field-collapsed .collapsed-box {
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    font-size: 0.8rem;
    font-weight: 700;
    color: #fff;
    padding: 0 12px;
    white-space: nowrap;
}

.bit-field-collapsed.sign .bit-field-label { color: var(--sign-color); }
.bit-field-collapsed.sign .collapsed-box { border-color: var(--sign-color); background: var(--sign-color); }

.bit-field-collapsed.exponent .bit-field-label { color: var(--exponent-color); }
.bit-field-collapsed.exponent .collapsed-box { border-color: var(--exponent-color); background: var(--exponent-color); }

.bit-field-collapsed.mantissa .bit-field-label { color: var(--mantissa-color); }
.bit-field-collapsed.mantissa .collapsed-box { border-color: var(--mantissa-color); background: var(--mantissa-color); }

.bit-field-collapsed.integer .bit-field-label { color: var(--integer-color); }
.bit-field-collapsed.integer .collapsed-box { border-color: var(--integer-color); background: var(--integer-color); }

.bit-field-collapsed .bit-field-width {
    font-size: 0.7rem;
    color: var(--text-secondary);
    margin-top: 4px;
    font-weight: 600;
}

/* ── Tables ────────────────────────────────────────────────── */
.info-table {
    width: 100%;
    border-collapse: collapse;
    margin: 12px 0;
    font-size: 0.9rem;
}

.info-table th,
.info-table td {
    padding: 10px 14px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.info-table th {
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    background: #f8fafc;
}

.info-table td {
    font-family: 'Courier New', monospace;
    font-weight: 600;
}

.info-table td.text-cell {
    font-family: inherit;
    font-weight: normal;
}

.info-table tr:last-child td {
    border-bottom: none;
}

.info-table tr:hover {
    background: #f8fafc;
}

.info-table .highlight-row td {
    background: rgba(37, 99, 235, 0.05);
}

/* ── Special Values Table ──────────────────────────────────── */
.special-table .bit-pattern {
    font-family: 'Courier New', monospace;
    font-size: 0.85rem;
    letter-spacing: 1px;
}

.special-table .sign-bits { color: var(--sign-color); font-weight: 700; }
.special-table .exp-bits { color: var(--exponent-color); font-weight: 700; }
.special-table .mant-bits { color: var(--mantissa-color); font-weight: 700; }

/* ── Interactive Visualizer ────────────────────────────────── */
.visualizer {
    margin: 16px 0;
}

.viz-input-row {
    display: flex;
    gap: 12px;
    margin-bottom: 16px;
    align-items: center;
    flex-wrap: wrap;
}

.viz-input-group {
    flex: 1;
    min-width: 180px;
    display: flex;
    gap: 8px;
    align-items: center;
}

.viz-input-row label {
    font-weight: 600;
    font-size: 0.9rem;
    white-space: nowrap;
}

.viz-input-row input[type="text"] {
    flex: 1;
    min-width: 0;
    padding: 8px 12px;
    border: 2px solid var(--border);
    border-radius: 8px;
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
    font-weight: 600;
    transition: border-color 0.2s;
}

.viz-input-row input[type="text"]:focus {
    outline: none;
    border-color: var(--primary-color);
}

.viz-presets {
    display: flex;
    gap: 4px;
    flex-wrap: wrap;
    margin-bottom: 16px;
}

.viz-preset-btn {
    padding: 6px 10px;
    border: 2px solid var(--border);
    border-radius: 6px;
    background: var(--surface);
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.15s ease;
    color: var(--text-primary);
}

.viz-preset-btn:hover {
    border-color: var(--primary-color);
    background: var(--primary-color);
    color: #fff;
}

.viz-preset-btn.active {
    border-color: var(--primary-color);
    background: var(--primary-color);
    color: #fff;
}

/* Binary display for visualizer */
.viz-binary {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    margin: 12px 0;
    justify-content: center;
}

.viz-bit-section {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 6px 6px 4px;
    border-radius: 8px;
    border: 2px solid;
    max-width: 100%;
}

.viz-bit-section.sign-section {
    background: rgba(239, 68, 68, 0.08);
    border-color: var(--sign-color);
}

.viz-bit-section.exponent-section {
    background: rgba(59, 130, 246, 0.08);
    border-color: var(--exponent-color);
}

.viz-bit-section.mantissa-section {
    background: rgba(16, 185, 129, 0.08);
    border-color: var(--mantissa-color);
}

.viz-bit-section.integer-section {
    background: rgba(139, 92, 246, 0.08);
    border-color: var(--integer-color);
}

.viz-section-label {
    font-size: 0.65rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 4px;
}

.sign-section .viz-section-label { color: var(--sign-color); }
.exponent-section .viz-section-label { color: var(--exponent-color); }
.mantissa-section .viz-section-label { color: var(--mantissa-color); }
.integer-section .viz-section-label { color: var(--integer-color); }

.viz-bits {
    display: flex;
    gap: 2px;
    flex-wrap: wrap;
    justify-content: center;
}

.viz-bit {
    width: 24px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid var(--border);
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    font-size: 0.85rem;
    font-weight: 700;
    cursor: pointer;
    user-select: none;
    transition: all 0.15s ease;
    background: var(--surface);
    color: var(--text-primary);
}

.viz-bit:hover {
    transform: scale(1.1);
    border-color: var(--primary-color);
}

.viz-bit.checked {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: #fff;
}

.sign-section .viz-bit.checked { background: var(--sign-color); border-color: var(--sign-color); }
.exponent-section .viz-bit.checked { background: var(--exponent-color); border-color: var(--exponent-color); }
.mantissa-section .viz-bit.checked { background: var(--mantissa-color); border-color: var(--mantissa-color); }
.integer-section .viz-bit.checked { background: var(--integer-color); border-color: var(--integer-color); }

/* Components display */
.viz-components {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 8px;
    margin-top: 12px;
    padding: 12px;
    background: #f8fafc;
    border-radius: 8px;
}

.viz-component {
    display: flex;
    gap: 6px;
    font-size: 0.85rem;
}

.viz-comp-label {
    color: var(--text-secondary);
    font-weight: 500;
    white-space: nowrap;
}

.viz-comp-value {
    font-family: 'Courier New', monospace;
    font-weight: 700;
    color: var(--text-primary);
}

/* ── Comparison Table ──────────────────────────────────────── */
.comparison-table {
    overflow-x: auto;
}

.comparison-table .info-table td.current-format {
    background: rgba(37, 99, 235, 0.08);
    font-weight: 700;
}

.comparison-table .info-table th.current-format {
    background: rgba(37, 99, 235, 0.12);
    color: var(--primary-color);
}

/* ── Tip / Note callouts ──────────────────────────────────── */
.callout {
    padding: 14px 18px;
    border-radius: 8px;
    margin: 16px 0;
    font-size: 0.9rem;
}

.callout-tip {
    background: rgba(16, 185, 129, 0.08);
    border-left: 4px solid var(--mantissa-color);
}

.callout-note {
    background: rgba(59, 130, 246, 0.08);
    border-left: 4px solid var(--exponent-color);
}

.callout-warning {
    background: rgba(245, 158, 11, 0.08);
    border-left: 4px solid #f59e0b;
}

.callout strong {
    display: block;
    margin-bottom: 4px;
}

/* ── Formula display ───────────────────────────────────────── */
.formula {
    text-align: center;
    padding: 16px;
    margin: 16px 0;
    background: #f8fafc;
    border-radius: 8px;
    font-family: 'Courier New', monospace;
    font-size: 1rem;
    font-weight: 600;
    overflow-x: auto;
}

/* ── Footer ────────────────────────────────────────────────── */
footer {
    text-align: center;
    padding: 20px 0;
    color: var(--text-secondary);
    font-size: 0.85rem;
    border-top: 1px solid var(--border);
    margin-top: 10px;
}

footer a {
    color: var(--primary-color);
    text-decoration: none;
}

footer a:hover {
    text-decoration: underline;
}

/* ── Responsive ────────────────────────────────────────────── */
@media (max-width: 768px) {
    body {
        padding: 5px 12px;
    }

    .format-nav {
        padding: 10px 14px;
    }

    .nav-groups {
        gap: 8px;
    }

    .doc-section {
        padding: 18px;
    }

    .bit-layout {
        gap: 6px;
    }

    .viz-binary {
        gap: 6px;
    }

    .viz-bit {
        width: 20px;
        height: 24px;
        font-size: 0.75rem;
    }

    .viz-components {
        grid-template-columns: 1fr;
    }

    .info-table th,
    .info-table td {
        padding: 8px 10px;
        font-size: 0.82rem;
    }

    .viz-presets {
        gap: 3px;
    }

    .viz-preset-btn {
        padding: 5px 8px;
        font-size: 0.75rem;
    }
}

@media (max-width: 480px) {
    header h1 {
        font-size: 1.5rem;
    }

    .nav-groups {
        flex-direction: column;
        gap: 6px;
    }

    .vd-readout {
        grid-template-columns: 1fr;
    }
}

/* ── Value Distribution Chart ──────────────────────────────── */
.vd-container {
    margin: 16px 0;
}

.vd-charts-row {
    display: flex;
    gap: 12px;
    margin-bottom: 8px;
}

.vd-chart-col {
    flex: 1;
    min-width: 0;
}

.vd-chart-title {
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    text-align: center;
    margin-bottom: 4px;
}

.vd-chart-title.sub-title { color: var(--mantissa-color); }
.vd-chart-title.norm-title { color: var(--exponent-color); }

.vd-chart-col.vd-inactive {
    opacity: 0.45;
    transition: opacity 0.2s ease;
}

.vd-chart-wrap {
    position: relative;
    border: 2px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
}

.vd-chart-col.vd-active .vd-chart-wrap {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 1px rgba(37, 99, 235, 0.15);
}

.vd-canvas {
    display: block;
    width: 100%;
    cursor: crosshair;
}

.vd-slider-row {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: 12px;
}

.vd-slider {
    flex: 1;
    -webkit-appearance: none;
    appearance: none;
    height: 6px;
    background: var(--border);
    border-radius: 3px;
    outline: none;
}

.vd-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 18px;
    height: 18px;
    background: var(--primary-color);
    border-radius: 50%;
    cursor: pointer;
    border: 2px solid white;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}

.vd-slider::-moz-range-thumb {
    width: 18px;
    height: 18px;
    background: var(--primary-color);
    border-radius: 50%;
    cursor: pointer;
    border: 2px solid white;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}

.vd-step-btn {
    width: 32px;
    height: 32px;
    border: 2px solid var(--border);
    border-radius: 6px;
    background: var(--surface);
    cursor: pointer;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.15s ease;
    color: var(--text-primary);
    flex-shrink: 0;
}

.vd-step-btn:hover {
    border-color: var(--primary-color);
    background: var(--primary-color);
    color: #fff;
}

.vd-readout {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 8px;
    margin-top: 12px;
    padding: 12px;
    background: #f8fafc;
    border-radius: 8px;
}

.vd-readout-item {
    display: flex;
    gap: 6px;
    font-size: 0.85rem;
}

.vd-readout-label {
    color: var(--text-secondary);
    font-weight: 500;
    white-space: nowrap;
}

.vd-readout-value {
    font-family: 'Courier New', monospace;
    font-weight: 700;
    color: var(--text-primary);
    word-break: break-all;
}

.vd-legend {
    display: flex;
    gap: 16px;
    margin-top: 10px;
    justify-content: center;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.vd-legend-item {
    display: flex;
    align-items: center;
    gap: 4px;
}

.vd-legend-sub { color: var(--mantissa-color); }
.vd-legend-norm { color: var(--exponent-color); }
.vd-legend-cursor { color: #ef4444; }

@media (max-width: 768px) {
    .vd-charts-row {
        flex-direction: column;
    }
}