/* E-Ink Typography Tester — style.css — Utilitarian Mono */

:root {
    --bg: #111418;
    --bg2: #0C0F13;
    --surface: #181C22;
    --surface2: #1D2229;
    --border: #252C36;
    --green: #39D353;
    --cyan: #58A6FF;
    --yellow: #E3B341;
    --red: #F78166;
    --text: #C9D1D9;
    --muted: #3A4A5C;
    --radius: 6px;
}

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

html,
body {
    height: 100%;
    overflow: hidden;
}

body {
    background: var(--bg);
    color: var(--text);
    font-family: 'JetBrains Mono', monospace;
    font-size: 12px;
    -webkit-font-smoothing: antialiased;
}

.mono {
    font-family: 'JetBrains Mono', monospace;
}

/* ── Header ──────────────────────────────────────────── */
.hdr {
    background: var(--bg2);
    border-bottom: 1px solid var(--border);
    padding: 7px 14px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-shrink: 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 7px;
}

.logo-icon {
    font-size: 1rem;
}

h1 {
    font-size: 0.78rem;
    font-weight: 700;
    color: var(--text);
}

.hdr-right {
    display: flex;
    align-items: center;
    gap: 8px;
}

.readability-badge {
    background: var(--surface2);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 4px 10px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.readability-badge.hidden {
    display: none;
}

.rb-label {
    font-size: 0.58rem;
    text-transform: uppercase;
    color: var(--muted);
    letter-spacing: 0.07em;
}

.rb-score {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--green);
}

/* ── Toolbar ─────────────────────────────────────────── */
.toolbar {
    background: var(--bg2);
    border-bottom: 1px solid var(--border);
    padding: 6px 14px;
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    align-items: center;
    flex-shrink: 0;
}

.tool-group {
    display: flex;
    align-items: center;
    gap: 7px;
}

.tool-label {
    font-size: 0.55rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--muted);
    font-weight: 700;
    white-space: nowrap;
}

.tool-sep {
    width: 1px;
    height: 18px;
    background: var(--border);
}

/* Hardware tabs */
.hw-tabs {
    display: flex;
    gap: 2px;
}

.hw-tab {
    padding: 3px 9px;
    border-radius: 5px;
    font-size: 0.65rem;
    font-weight: 600;
    cursor: pointer;
    border: 1px solid var(--border);
    background: transparent;
    color: var(--muted);
    font-family: 'JetBrains Mono', monospace;
    transition: all 0.12s;
    white-space: nowrap;
}

.hw-tab.active {
    background: var(--surface2);
    color: var(--green);
    border-color: var(--green);
}

.hw-tab:hover:not(.active) {
    color: var(--text);
}

/* Toggles */
.toggle-lbl {
    display: flex;
    align-items: center;
    gap: 5px;
    cursor: pointer;
    font-size: 0.7rem;
    color: var(--text);
}

.toggle-lbl input[type=checkbox] {
    display: none;
}

.toggle-track {
    width: 28px;
    height: 14px;
    background: var(--surface2);
    border-radius: 7px;
    border: 1px solid var(--border);
    position: relative;
    transition: background 0.15s, border-color 0.15s;
    flex-shrink: 0;
}

.toggle-track::after {
    content: '';
    position: absolute;
    top: 2px;
    left: 2px;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--muted);
    transition: all 0.15s;
}

.toggle-lbl input:checked+.toggle-track {
    background: rgba(57, 211, 83, 0.15);
    border-color: var(--green);
}

.toggle-lbl input:checked+.toggle-track::after {
    left: 16px;
    background: var(--green);
}

/* Sliders */
.slider-row {
    display: flex;
    align-items: center;
    gap: 5px;
}

.sl-label {
    font-size: 0.6rem;
    color: var(--muted);
    width: 36px;
}

.slider {
    -webkit-appearance: none;
    height: 3px;
    border-radius: 2px;
    background: var(--surface2);
    border: 1px solid var(--border);
    width: 70px;
    cursor: pointer;
}

.slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--green);
    border: 2px solid var(--bg);
    cursor: pointer;
}

.sl-val {
    font-size: 0.6rem;
    color: var(--cyan);
    font-family: 'JetBrains Mono';
    width: 30px;
}

.tool-sel {
    background: var(--surface2);
    border: 1px solid var(--border);
    color: var(--text);
    border-radius: 5px;
    padding: 3px 6px;
    font-size: 0.65rem;
    font-family: 'JetBrains Mono';
    outline: none;
}

/* Contrast */
.contrast-row {
    display: flex;
    align-items: center;
    gap: 5px;
}

.contrast-row input[type=color] {
    width: 22px;
    height: 22px;
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 1px;
    background: none;
    cursor: pointer;
}

.contrast-badge {
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 0.65rem;
    font-weight: 700;
    font-family: 'JetBrains Mono';
    background: var(--surface2);
    border: 1px solid var(--border);
    color: var(--text);
}

/* ── Split layout ────────────────────────────────────── */
.split {
    display: grid;
    grid-template-columns: 360px 1fr;
    height: calc(100vh - 90px);
}

/* ── Editor panel ────────────────────────────────────── */
.editor-panel {
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
}

.ep-hdr {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 6px 10px;
    border-bottom: 1px solid var(--border);
    background: var(--bg2);
    flex-shrink: 0;
}

.ep-title {
    font-size: 0.65rem;
    color: var(--muted);
    font-weight: 700;
}

.ep-btns {
    display: flex;
    gap: 4px;
}

.html-editor {
    flex: 1;
    background: var(--bg);
    color: #C9D1D9;
    border: none;
    padding: 10px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.72rem;
    line-height: 1.6;
    resize: none;
    outline: none;
}

.html-editor::placeholder {
    color: var(--muted);
}

/* ── Sim panel ───────────────────────────────────────── */
.sim-panel {
    display: flex;
    flex-direction: column;
    position: relative;
    background: var(--surface);
}

.sim-hdr {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 6px 10px;
    border-bottom: 1px solid var(--border);
    background: var(--bg2);
    flex-shrink: 0;
}

.sim-title {
    font-size: 0.65rem;
    color: var(--text);
    font-weight: 700;
}

.sim-info {
    display: flex;
    gap: 5px;
}

.sim-badge {
    font-size: 0.55rem;
    padding: 1px 6px;
    border-radius: 4px;
    background: var(--surface2);
    border: 1px solid var(--border);
    color: var(--muted);
    font-family: 'JetBrains Mono';
}

.sim-badge.gray {
    color: var(--cyan);
    border-color: rgba(88, 166, 255, 0.25);
}

.flash-overlay {
    position: absolute;
    inset: 0;
    z-index: 10;
    background: black;
    opacity: 0;
    pointer-events: none;
}

.flash-overlay.hidden {
    display: none;
}

.eink-canvas {
    width: 100%;
    flex: 1;
    display: block;
    image-rendering: pixelated;
}

/* ── Buttons ─────────────────────────────────────────── */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    border-radius: 5px;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: all 0.13s;
    white-space: nowrap;
    font-family: 'JetBrains Mono', monospace;
}

.btn:active {
    transform: scale(0.97);
}

.btn-mono {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text);
    border: 1px solid var(--border);
    padding: 5px 10px;
    font-size: 0.68rem;
}

.btn-mono:hover {
    border-color: var(--cyan);
    color: var(--cyan);
}

.btn-run {
    background: var(--green);
    color: var(--bg2);
    padding: 4px 12px;
    font-size: 0.68rem;
}

.btn-run:hover {
    background: #52e46a;
}

.btn-sm {
    padding: 4px 9px;
    font-size: 0.65rem;
}

.btn-xs {
    padding: 3px 7px;
    font-size: 0.62rem;
}

/* ── Toast ───────────────────────────────────────────── */
#toast-wrap {
    position: fixed;
    bottom: 12px;
    right: 12px;
    z-index: 600;
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.toast {
    background: var(--surface2);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 7px 12px;
    font-size: 0.75rem;
    animation: slide-up .2s ease;
    font-family: 'JetBrains Mono';
}

.toast.ok {
    border-color: rgba(57, 211, 83, .3);
    color: var(--green);
}

.toast.err {
    border-color: rgba(247, 129, 102, .3);
    color: var(--red);
}

@keyframes slide-up {
    from {
        transform: translateY(7px);
        opacity: 0;
    }
}

.hidden {
    display: none !important;
}

@media (max-width: 720px) {

    html,
    body {
        height: auto;
        overflow: auto;
    }

    .split {
        grid-template-columns: 1fr;
        height: auto;
    }

    .eink-canvas {
        min-height: 320px;
    }
}