/* Color Contrast Checker - mobile-first */

:root {
    --ccc-bg: var(--bs-body-bg, #fff);
    --ccc-surface: var(--bs-secondary-bg, #f8f9fa);
    --ccc-border: var(--bs-border-color, #dee2e6);
    --ccc-text: var(--bs-body-color, #212529);
    --ccc-muted: var(--text-muted, #6c757d);
    --ccc-radius: 12px;
    --ccc-radius-sm: 8px;
    --ccc-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
    --ccc-shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --ccc-pass-bg: rgba(22, 163, 74, 0.12);
    --ccc-pass-text: #15803d;
    --ccc-fail-bg: rgba(220, 53, 69, 0.12);
    --ccc-fail-text: #b02a37;
}

/* --- Tool interface: full-width card, 2 columns --- */
.ccc-tool {
    width: 100%;
    margin: 0 auto;
}

.ccc-card {
    width: 100%;
    background: var(--ccc-bg);
    border: 1px solid var(--ccc-border);
    border-radius: var(--ccc-radius);
    box-shadow: var(--ccc-shadow-md);
    overflow: hidden;
}

.ccc-card-inner {
    display: grid;
    grid-template-columns: 1fr;
    min-height: 0;
}

.ccc-col-input {
    padding: 1.5rem;
    border-bottom: 1px solid var(--ccc-border);
}

.ccc-col-result {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    background: var(--ccc-surface);
}

@media (min-width: 768px) {
    .ccc-card-inner {
        grid-template-columns: 2fr 3fr;
    }

    .ccc-col-input {
        border-bottom: none;
        border-right: 1px solid var(--ccc-border);
        padding: 1.75rem;
    }

    .ccc-col-result {
        padding: 1.75rem;
        gap: 1.5rem;
    }
}

@media (min-width: 992px) {
    .ccc-card-inner {
        grid-template-columns: 2fr 3fr;
    }

    .ccc-col-input,
    .ccc-col-result {
        padding: 2rem;
    }
}

.ccc-pickers {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.ccc-swatch-wrap {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.ccc-swatch-label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--ccc-muted);
}

.ccc-swatch-row {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.ccc-color-input {
    width: 48px;
    height: 48px;
    padding: 0;
    border: 2px solid var(--ccc-border);
    border-radius: var(--ccc-radius-sm);
    background: var(--ccc-surface);
    cursor: pointer;
    flex-shrink: 0;
}

.ccc-color-input:hover {
    border-color: var(--ccc-muted);
}

.ccc-hex-input {
    flex: 1;
    min-width: 0;
    padding: 0.6rem 0.75rem;
    
    font-size: 0.9375rem;
    border: 1px solid var(--ccc-border);
    border-radius: var(--ccc-radius-sm);
    background: var(--ccc-bg);
    color: var(--ccc-text);
}

.ccc-hex-input:focus {
    outline: none;
    border-color: #0d6efd;
    box-shadow: 0 0 0 3px rgba(13, 110, 253, 0.2);
}

.ccc-preview-block {
    background: var(--ccc-bg);
    border-radius: var(--ccc-radius-sm);
    border: 1px solid var(--ccc-border);
    overflow: hidden;
}

.ccc-live-preview {
    min-height: 120px;
    padding: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.125rem;
    font-weight: 600;
}

.ccc-preview-text {
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.15);
}

.ccc-ratio-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 1.25rem;
    border-top: 1px solid var(--ccc-border);
    background: var(--ccc-bg);
}

.ccc-ratio-label {
    font-size: 0.875rem;
    color: var(--ccc-muted);
}

.ccc-ratio-value {
    font-size: 1.25rem;
    font-weight: 700;
    font-variant-numeric: tabular-nums;
}

.ccc-samples {
    display: grid;
    gap: 1rem;
}

.ccc-sample {
    padding: 1rem 1.25rem;
    border-radius: var(--ccc-radius-sm);
    border: 1px solid var(--ccc-border);
    background: var(--ccc-bg);
}

.ccc-sample-label {
    display: block;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--ccc-muted);
    margin-bottom: 0.35rem;
}

.ccc-sample p {
    margin: 0;
    font-size: 1rem;
    line-height: 1.5;
}

#ccc-sample-large p {
    font-size: 1.5rem;
    font-weight: 600;
}

.ccc-wcag {
    margin-bottom: 0;
}

.ccc-wcag-title,
.ccc-presets-title {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--ccc-text);
}

.ccc-wcag-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.ccc-wcag-card {
    padding: 1rem 1.25rem;
    border-radius: var(--ccc-radius-sm);
    border: 1px solid var(--ccc-border);
    background: var(--ccc-bg);
    transition: border-color 0.2s, background-color 0.2s;
}

.ccc-wcag-card.ccc-pass {
    background: var(--ccc-pass-bg);
    border-color: rgba(22, 163, 74, 0.35);
}

.ccc-wcag-card.ccc-fail {
    background: var(--ccc-fail-bg);
    border-color: rgba(220, 53, 69, 0.35);
}

.ccc-wcag-badge {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 700;
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    background: var(--ccc-surface);
    color: var(--ccc-muted);
    margin-bottom: 0.6rem;
}

.ccc-wcag-card.ccc-pass .ccc-wcag-badge {
    background: var(--ccc-pass-text);
    color: #fff;
}

.ccc-wcag-card.ccc-fail .ccc-wcag-badge {
    background: var(--ccc-fail-text);
    color: #fff;
}

.ccc-wcag-rows {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.ccc-wcag-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.875rem;
}

.ccc-wcag-row span:first-child {
    color: var(--ccc-muted);
}

.ccc-status {
    font-weight: 600;
}

.ccc-status.ccc-ok {
    color: var(--ccc-pass-text);
}

.ccc-status.ccc-no {
    color: var(--ccc-fail-text);
}

.ccc-wcag-note {
    font-size: 0.8125rem;
    color: var(--ccc-muted);
    margin-top: 0.75rem;
    margin-bottom: 0;
}

.ccc-col-input .ccc-presets {
    margin-bottom: 0;
}

.ccc-presets-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.ccc-preset-chip {
    padding: 0.5rem 0.875rem;
    font-size: 0.875rem;
    font-weight: 500;
    border: 1px solid var(--ccc-border);
    border-radius: 999px;
    background: var(--ccc-chip-bg, var(--ccc-surface));
    color: var(--ccc-chip-text, var(--ccc-text));
    cursor: pointer;
    transition: transform 0.15s, box-shadow 0.15s;
}

.ccc-preset-chip:hover {
    transform: translateY(-1px);
    box-shadow: var(--ccc-shadow-md);
}

.ccc-preset-chip:active {
    transform: translateY(0);
}

/* Education block */
.ccc-edu {
    max-width: 720px;
    margin: 0 auto;
    padding: 1.5rem;
    background: var(--ccc-surface);
    border-radius: var(--ccc-radius);
}

.ccc-edu-h2 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
}

.ccc-edu-h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-top: 1.25rem;
    margin-bottom: 0.5rem;
}

.ccc-edu p,
.ccc-edu ul {
    margin-bottom: 0;
    font-size: 0.9375rem;
    line-height: 1.6;
    color: var(--ccc-text);
}

.ccc-edu ul {
    padding-left: 1.25rem;
}

.ccc-edu li + li {
    margin-top: 0.25rem;
}

/* Mobile: single column layout, stacked pickers */
@media (max-width: 767px) {
    .ccc-col-input,
    .ccc-col-result {
        padding: 1.25rem;
    }
}

@media (max-width: 480px) {
    .ccc-pickers {
        grid-template-columns: 1fr;
    }

    .ccc-wcag-grid {
        grid-template-columns: 1fr;
    }

    .ccc-live-preview {
        min-height: 100px;
        padding: 1.25rem;
        font-size: 1rem;
    }

    .ccc-ratio-bar {
        padding: 0.6rem 1rem;
    }

    .ccc-ratio-value {
        font-size: 1.125rem;
    }
}