/* Color Space Converter - mobile-first, sleek */

:root {
    --csc-bg: var(--bs-body-bg, #fff);
    --csc-surface: var(--bs-secondary-bg, #f6f7f9);
    --csc-border: var(--bs-border-color, #e5e7eb);
    --csc-text: var(--bs-body-color, #111827);
    --csc-muted: var(--text-muted, #6b7280);
    --csc-accent: #0f766e;
    --csc-accent-hover: #0d5c56;
    --csc-radius: 14px;
    --csc-radius-sm: 10px;
    --csc-shadow: 0 1px 2px rgba(0, 0, 0, 0.04);
    --csc-shadow-md: 0 4px 14px rgba(0, 0, 0, 0.06);
    --csc-focus-ring: 0 0 0 3px rgba(15, 118, 110, 0.25);
}

/* --- Tool interface: full-width card, left input / right result --- */
.csc-interface {
    width: 100%;
    margin: 0 auto;
    margin-bottom: 2rem;
}

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

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

.csc-col-input,
.csc-col-result {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.csc-col-input {
    background: var(--csc-surface);
    border-bottom: 1px solid var(--csc-border);
}

.csc-col-heading {
    font-size: 1rem;
    font-weight: 700;
    color: var(--csc-text);
    margin: 0 0 0.25rem 0;
    letter-spacing: 0.02em;
}

.csc-pick-strip {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-end;
    gap: 1rem 1.5rem;
}

.csc-pick-label,
.csc-hex-label {
    display: block;
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--csc-muted);
    margin-bottom: 0.375rem;
    letter-spacing: 0.02em;
}

.csc-color-picker {
    width: 56px;
    height: 56px;
    padding: 0;
    border: 2px solid var(--csc-border);
    border-radius: var(--csc-radius-sm);
    cursor: pointer;
    background: transparent;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.csc-color-picker:hover {
    border-color: var(--csc-accent);
}

.csc-color-picker:focus-visible {
    outline: none;
    box-shadow: var(--csc-focus-ring);
}

.csc-hex-wrap {
    flex: 1;
    min-width: 140px;
}

.csc-hex-input {
    display: block;
    width: 100%;
    padding: 0.625rem 0.875rem;
    font-size: 1rem;
    
    color: var(--csc-text);
    background: var(--csc-bg);
    border: 1px solid var(--csc-border);
    border-radius: var(--csc-radius-sm);
    transition: border-color 0.2s, box-shadow 0.2s;
}

.csc-hex-input::placeholder {
    color: var(--csc-muted);
}

.csc-hex-input:focus {
    outline: none;
    border-color: var(--csc-accent);
    box-shadow: var(--csc-focus-ring);
}

.csc-col-result .csc-preview-wrap {
    margin-bottom: 0;
}

.csc-preview {
    width: 100%;
    min-height: 140px;
    border-radius: var(--csc-radius);
    border: 1px solid var(--csc-border);
    box-shadow: var(--csc-shadow-md);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: box-shadow 0.2s;
}

.csc-preview-label {
    font-size: 1.125rem;
    font-weight: 600;
    padding: 0.5rem 0.75rem;
    border-radius: var(--csc-radius-sm);
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.15);
}

.csc-output {
    margin-bottom: 0;
    flex: 1;
    min-height: 0;
}

.csc-output-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 0.75rem;
}

.csc-output-card {
    background: var(--csc-surface);
    border: 1px solid var(--csc-border);
    border-radius: var(--csc-radius-sm);
    padding: 1rem;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.csc-output-card:hover {
    border-color: var(--csc-accent);
    box-shadow: var(--csc-shadow);
}

.csc-output-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.75rem;
    gap: 0.5rem;
}

.csc-output-title {
    font-size: 0.875rem;
    font-weight: 700;
    color: var(--csc-text);
    letter-spacing: 0.02em;
}

.csc-output-copy {
    padding: 0.35rem 0.6rem;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--csc-accent);
    background: transparent;
    border: 1px solid var(--csc-accent);
    border-radius: 6px;
    cursor: pointer;
    transition: background 0.2s, color 0.2s;
}

.csc-output-copy:hover {
    background: var(--csc-accent);
    color: #fff;
}

.csc-output-copy:focus-visible {
    outline: none;
    box-shadow: var(--csc-focus-ring);
}

.csc-output-values {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.csc-value-pill {
    text-align: center;flex: 1;
    padding: 0.4rem 0.6rem;
    background: var(--csc-bg);
    border: 1px solid var(--csc-border);
    border-radius: 6px;
    font-size: 0.8125rem;
}

.csc-value-pill-label {
    display: block;
    font-size: 0.6875rem;
    font-weight: 600;
    color: var(--csc-muted);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    margin-bottom: 0.125rem;
}

.csc-value-pill-num {
    font-weight: 600;
    color: var(--csc-text);
    font-variant-numeric: tabular-nums;
}

.csc-formats {
    padding-top: 0.25rem;
}

.csc-formats-heading {
    font-size: 1rem;
    font-weight: 700;
    color: var(--csc-text);
    margin: 0 0 0.25rem 0;
}

.csc-formats-desc {
    font-size: 0.875rem;
    color: var(--csc-muted);
    margin: 0 0 0.75rem 0;
}

.csc-formats-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.csc-format-chip {
    padding: 0.5rem 0.875rem;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--csc-text);
    background: var(--csc-surface);
    border: 1px solid var(--csc-border);
    border-radius: var(--csc-radius-sm);
    cursor: pointer;
    transition: border-color 0.2s, background 0.2s, color 0.2s;
}

.csc-format-chip:hover {
    border-color: var(--csc-accent);
    background: rgba(15, 118, 110, 0.08);
    color: var(--csc-accent);
}

.csc-format-chip:focus-visible {
    outline: none;
    box-shadow: var(--csc-focus-ring);
}

/* Mobile: single column, larger touch targets */
@media (max-width: 767px) {
    .csc-col-input,
    .csc-col-result {
        padding: 1.25rem;
    }

    .csc-color-picker {
        width: 64px;
        height: 64px;
    }

    .csc-output-grid {
        grid-template-columns: 1fr;
    }

    .csc-preview {
        min-height: 120px;
    }
}

@media (min-width: 768px) {
    .csc-card-inner {
        grid-template-columns: minmax(280px, 360px) 1fr;
    }

    .csc-col-input {
        border-bottom: none;
        border-right: 1px solid var(--csc-border);
    }

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

    .csc-preview {
        min-height: 160px;
    }

    .csc-output-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }
}

@media (min-width: 992px) {
    .csc-output-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}