/* CSS Unit Converter — css-unit-converter.css */
.css-unit-section {
    --tool-accent: #6366F1;
    --tool-accent-rgb: 99, 102, 241;
}

/* ── Primary button gradient ───────────────────────── */
.css-unit-section .tool-btn--primary {
    background: linear-gradient(135deg, #6366F1 0%, #8B5CF6 100%);
    border-color: transparent;
    box-shadow: 0 2px 8px rgba(99, 102, 241, 0.35);
}

.css-unit-section .tool-btn--primary:hover:not(:disabled) {
    filter: none;
    background: linear-gradient(135deg, #4F46E5 0%, #7C3AED 100%);
    box-shadow: 0 4px 14px rgba(99, 102, 241, 0.45);
}

/* ── Context bar ──────────────────────────────────── */
.cu-context-bar {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0;
    background: rgba(var(--tool-accent-rgb), 0.04);
    border: 1.5px solid rgba(var(--tool-accent-rgb), 0.14);
    border-radius: 12px;
    padding: 12px 20px;
    margin-bottom: 16px;
}

.cu-context-item {
    flex: 1;
    min-width: 200px;
    padding: 2px 14px;
}

.cu-ctx-label {
    display: block;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: #94A3B8;
    margin-bottom: 6px;
}

.cu-ctx-hint {
    font-weight: 400;
    text-transform: none;
    letter-spacing: 0;
    color: #CBD5E1;
}

.cu-ctx-input-wrap {
    display: flex;
    align-items: center;
    gap: 6px;
}

.cu-ctx-input {
    width: 80px;
    padding: 5px 8px !important;
    font-size: 0.875rem !important;
    text-align: center;
}

.cu-ctx-unit {
    font-size: 0.75rem;
    font-weight: 600;
    color: #94A3B8;
}

.cu-ctx-x {
    font-size: 0.75rem;
    color: #CBD5E1;
    padding: 0 2px;
}

.cu-context-sep {
    width: 1px;
    height: 40px;
    background: rgba(100, 116, 139, 0.15);
    flex-shrink: 0;
    margin: 0 6px;
}

/* ── Input block ──────────────────────────────────── */
.cu-input-block {
    background: #FAFAFA;
    border: 1.5px solid rgba(100, 116, 139, 0.1);
    border-radius: 12px;
    padding: 18px 20px;
    margin-bottom: 16px;
}

.cu-input-row {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 14px;
}

.cu-value-in {
    width: 150px;
    flex-shrink: 0;
    font-family: 'SFMono-Regular', Consolas, monospace;
    font-size: 1.125rem !important;
    font-weight: 600;
    text-align: right;
}

/* ── Unit pills ───────────────────────────────────── */
.cu-unit-pills {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.cu-unit-pill {
    padding: 7px 16px;
    border-radius: 999px;
    border: 1.5px solid rgba(100, 116, 139, 0.2);
    background: #fff;
    font-family: 'SFMono-Regular', Consolas, monospace;
    font-size: 0.875rem;
    font-weight: 600;
    color: #64748B;
    cursor: pointer;
    transition: border-color 0.15s, background 0.15s, color 0.15s;
    line-height: 1;
}

.cu-unit-pill:hover {
    border-color: var(--tool-accent);
    color: var(--tool-accent);
}

.cu-unit-pill--active,
.cu-unit-pill--active:hover {
    background: var(--tool-accent);
    border-color: var(--tool-accent);
    color: #fff;
    box-shadow: 0 2px 6px rgba(var(--tool-accent-rgb), 0.3);
}

.cu-input-actions {
    display: flex;
    gap: 8px;
    align-items: center;
}

/* ── Results grid ─────────────────────────────────── */
.cu-results {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.cu-group {
    background: #F8FAFC;
    border: 1.5px solid rgba(100, 116, 139, 0.1);
    border-radius: 12px;
    padding: 14px 16px;
}

.cu-group-title {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: #94A3B8;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.cu-cards-row {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
    gap: 8px;
}

.cu-card {
    position: relative;
    padding: 12px 14px;
    background: #fff;
    border: 1.5px solid rgba(100, 116, 139, 0.12);
    border-radius: 10px;
    cursor: pointer;
    transition: border-color 0.15s;
}

.cu-card:hover {
    border-color: var(--tool-accent);
}

.cu-card--source {
    border-color: var(--tool-accent);
    background: rgba(var(--tool-accent-rgb), 0.04);
}

.cu-card-unit {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: #94A3B8;
    margin-bottom: 6px;
    display: flex;
    align-items: center;
    gap: 4px;
}

.cu-card--source .cu-card-unit {
    color: var(--tool-accent);
}

.cu-card-value {
    font-family: 'SFMono-Regular', Consolas, monospace;
    font-size: 1rem;
    font-weight: 700;
    color: #0F172A;
    padding-right: 26px;
    word-break: break-all;
    min-height: 1.25em;
}

.cu-card-copy {
    position: absolute;
    top: 8px;
    right: 8px;
    width: 24px;
    height: 24px;
    color: #94A3B8;
    transition: color 0.15s;
    flex-shrink: 0;
}

.cu-card-copy:hover,
.cu-card-copy[data-copied] {
    color: var(--tool-accent);
}

.cu-approx-badge {
    font-size: 0.875rem;
    font-weight: 700;
    color: #F59E0B;
}

/* ── Preset chips ──────────────────────────────────── */
.cu-presets {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 6px;
    margin-bottom: 14px;
}

.cu-presets-label {
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: #94A3B8;
    margin-right: 2px;
    flex-shrink: 0;
}

.cu-preset-chip {
    padding: 4px 10px;
    border-radius: 999px;
    border: 1.5px solid rgba(100, 116, 139, 0.2);
    background: #fff;
    font-family: 'SFMono-Regular', Consolas, monospace;
    font-size: 0.75rem;
    font-weight: 600;
    color: #64748B;
    cursor: pointer;
    transition: border-color 0.15s, background 0.15s, color 0.15s;
    line-height: 1;
}

.cu-preset-chip:hover {
    border-color: var(--tool-accent);
    color: var(--tool-accent);
    background: rgba(var(--tool-accent-rgb), 0.04);
}

/* ── Card formula hint ──────────────────────────── */
.cu-card-formula {
    display: block;
    font-size: 0.6875rem;
    color: #94A3B8;
    margin-top: 3px;
    margin-bottom: 2px;
    padding-right: 26px;
}

.cu-card--source .cu-card-formula {
    color: rgba(var(--tool-accent-rgb), 0.7);
}

/* ── Responsive ───────────────────────────────────── */
@media (max-width: 640px) {
    .cu-context-bar {
        flex-direction: column;
        gap: 12px;
        padding: 14px;
    }

    .cu-context-sep {
        width: 100%;
        height: 1px;
        margin: 0;
    }

    .cu-context-item {
        min-width: 100%;
        padding: 0;
    }

    .cu-value-in {
        width: 110px;
    }

    .cu-cards-row {
        grid-template-columns: repeat(2, 1fr);
    }
}