/* Responsive Typography Scale — style.css */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
    --bg: #ffffff;
    --bg2: #f8f9fa;
    --bg3: #f1f3f5;
    --border: #e2e8f0;
    --border2: rgba(0, 0, 0, 0.05);
    --text: #0f172a;
    --text2: #64748b;
    --text3: #94a3b8;
    --primary: #7c3aed;
    --primary2: #a78bfa;
    --primary-bg: rgba(124, 58, 237, 0.06);
    --radius: 10px;
    --t: all 0.18s ease;
}

[data-theme="dark"] {
    --bg: #0f0f14;
    --bg2: #16161e;
    --bg3: #1e1e28;
    --border: #2a2a38;
    --border2: rgba(255, 255, 255, 0.04);
    --text: #e8e0ff;
    --text2: #7878a0;
    --text3: #3a3858;
    --primary: #a78bfa;
    --primary2: #c4b5fd;
    --primary-bg: rgba(167, 139, 250, 0.08);
}

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

body {
    font-family: 'Inter', sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    transition: background 0.25s;
}

/* Header */
header {
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 50;
}

.hdr {
    max-width: 1360px;
    margin: 0 auto;
    padding: 10px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.brand {
    display: flex;
    align-items: center;
    gap: 10px;
}

.brand-icon {
    width: 34px;
    height: 34px;
    border-radius: 8px;
    background: var(--primary);
    color: #fff;
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 8px rgba(124, 58, 237, 0.3);
}

.brand-title {
    font-size: 14px;
    font-weight: 700;
}

h1.brand-title {
    display: inline;
}

.brand-sub {
    font-size: 10px;
    color: var(--text3);
}

/* Layout */
.layout {
    max-width: 1360px;
    margin: 0 auto;
    padding: 16px 20px 48px;
    display: grid;
    grid-template-columns: 260px 1fr;
    gap: 16px;
    align-items: start;
}

/* Controls */
.controls {
    background: var(--bg2);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    position: sticky;
    top: 60px;
}

.section-title {
    font-size: 10px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.07em;
    color: var(--text3);
    padding-top: 4px;
}

.section-title.mt {
    margin-top: 8px;
}

.mt {
    margin-top: 8px;
}

.control-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 8px;
}

.ctrl-label {
    font-size: 11px;
    color: var(--text2);
    white-space: nowrap;
}

/* Ratio buttons */
.ratio-btns {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 5px;
}

.ratio-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 6px 4px;
    border-radius: 7px;
    border: 1px solid var(--border);
    background: var(--bg3);
    font-size: 11px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--t);
    line-height: 1.3;
    color: var(--text2);
}

.ratio-btn small {
    font-size: 9px;
    color: var(--text3);
    font-family: 'JetBrains Mono', monospace;
}

.ratio-btn.active {
    border-color: var(--primary);
    background: var(--primary-bg);
    color: var(--primary);
}

.ratio-btn:hover {
    border-color: var(--primary2);
}

/* Inputs */
.inp {
    background: var(--bg3);
    border: 1px solid var(--border);
    border-radius: 7px;
    color: var(--text);
    padding: 5px 9px;
    font-size: 12px;
    font-family: 'Inter', sans-serif;
    outline: none;
    transition: var(--t);
    width: 100%;
    max-width: 120px;
}

.inp:focus {
    border-color: var(--primary);
    background: var(--bg2);
}

select.inp {
    cursor: pointer;
    max-width: 90px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 7px 14px;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: var(--bg3);
    color: var(--text);
    font-family: 'Inter', sans-serif;
    font-size: 12px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--t);
}

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

.btn-sm {
    padding: 4px 10px;
    font-size: 11px;
    border-radius: 7px;
}

.btn-primary {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
    font-weight: 700;
    width: 100%;
    justify-content: center;
}

.btn-primary:hover {
    opacity: 0.9;
}

.btn-outline {
    border: 1px solid var(--border);
    background: transparent;
    color: var(--text2);
    width: 100%;
    justify-content: center;
}

.btn-outline:hover {
    border-color: var(--primary);
    color: var(--primary);
}

/* Preview */
.preview {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.preview-hdr,
.css-output-hdr {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 8px;
}

.preview-label {
    font-size: 10px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.07em;
    color: var(--text3);
}

.preview-controls {
    display: flex;
    align-items: center;
    gap: 8px;
}

.preview-width-val {
    font-size: 11px;
    font-family: 'JetBrains Mono', monospace;
    color: var(--primary);
    min-width: 50px;
}

/* Scale table */
.scale-table {
    background: var(--bg2);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
}

.scale-row {
    display: grid;
    grid-template-columns: 80px 90px 90px 130px 130px 1fr auto;
    align-items: center;
    padding: 8px 12px;
    border-bottom: 1px solid var(--border2);
    font-size: 12px;
    gap: 8px;
}

.scale-row:last-child {
    border-bottom: none;
}

.scale-row-hdr {
    background: var(--bg3);
    font-size: 10px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text3);
}

.scale-step {
    font-family: 'JetBrains Mono', monospace;
    font-weight: 700;
    color: var(--primary);
}

.scale-val {
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    color: var(--text2);
}

.scale-clamp {
    font-family: 'JetBrains Mono', monospace;
    font-size: 10px;
    color: var(--text3);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.scale-copy {
    padding: 2px 7px;
    border-radius: 4px;
    border: 1px solid var(--border);
    background: transparent;
    font-size: 10px;
    cursor: pointer;
    color: var(--text2);
    transition: var(--t);
}

.scale-copy:hover {
    border-color: var(--primary);
    color: var(--primary);
}

/* Preview text */
.preview-text-wrap {
    background: var(--bg2);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px 24px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.preview-elem {
    transition: font-size 0.3s ease;
    line-height: 1.2;
}

.preview-body {
    color: var(--text2);
    font-size: 14px;
    line-height: 1.6;
    margin-top: 4px;
}

/* CSS output */
.css-output-section {
    background: var(--bg2);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
}

.css-output-hdr {
    padding: 8px 12px;
    border-bottom: 1px solid var(--border2);
}

.css-output {
    padding: 14px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 11.5px;
    line-height: 1.75;
    color: var(--text);
    overflow-x: auto;
    white-space: pre;
}

.tok-var {
    color: #a78bfa;
}

.tok-fn {
    color: #60a5fa;
}

.tok-num {
    color: #86efac;
}

.tok-unit {
    color: #fca5a5;
}

/* Toast */
.toast-wrap {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: 6px;
    pointer-events: none;
}

.toast {
    background: var(--bg2);
    border: 1px solid rgba(167, 139, 250, 0.3);
    border-radius: 10px;
    padding: 8px 14px;
    font-size: 12px;
    color: var(--text);
    transform: translateX(20px);
    opacity: 0;
    transition: all 0.22s ease;
}

.toast.show {
    transform: none;
    opacity: 1;
}

::-webkit-scrollbar {
    width: 5px;
    height: 5px
}

::-webkit-scrollbar-track {
    background: transparent
}

::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 3px
}

@media(max-width:900px) {
    .layout {
        grid-template-columns: 1fr;
    }

    .controls {
        position: static;
    }

    .scale-row {
        grid-template-columns: 60px 80px 90px 1fr auto;
    }

    .scale-row>:nth-child(4),
    .scale-row>:nth-child(5) {
        display: none;
    }
}