/* HSV to RGB Converter – mobile-first, sleek */

:root {
    --hsvrgb-bg: #f8f9fa;
    --hsvrgb-surface: #ffffff;
    --hsvrgb-surface-elevated: #f1f3f5;
    --hsvrgb-border: #dee2e6;
    --hsvrgb-text: #212529;
    --hsvrgb-muted: #6c757d;
    --hsvrgb-accent: #0d6efd;
    --hsvrgb-accent-dim: #0a58ca;
    --hsvrgb-radius: 14px;
    --hsvrgb-radius-sm: 10px;
    --hsvrgb-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
    --hsvrgb-focus: 0 0 0 3px rgba(13, 110, 253, 0.25);
}

/* Tool container */
.hsv-rgb-tool {
    background: var(--hsvrgb-surface);
    border: 1px solid var(--hsvrgb-border);
    border-radius: var(--hsvrgb-radius);
    box-shadow: var(--hsvrgb-shadow);
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

/* Main grid: HSV panel | Result panel */
.hsv-rgb-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
}

@media (min-width: 640px) {
    .hsv-rgb-grid {
        grid-template-columns: 1fr 1fr;
    }
}

.panel-heading {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--hsvrgb-muted);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin: 0 0 1rem;
}

/* HSV panel */
.hsv-panel {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

/* Hue ring */
.hue-ring-wrap {
    position: relative;
    width: 100%;
    max-width: 200px;
    aspect-ratio: 1;
    margin: 0 auto;
    border-radius: 50%;
    cursor: pointer;
    touch-action: none;
    outline: none;
}

.hue-ring-wrap:focus-visible {
    box-shadow: var(--hsvrgb-focus);
}

.hue-ring {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background: conic-gradient(
        hsl(0, 100%, 50%) 0deg,
        hsl(60, 100%, 50%) 60deg,
        hsl(120, 100%, 50%) 120deg,
        hsl(180, 100%, 50%) 180deg,
        hsl(240, 100%, 50%) 240deg,
        hsl(300, 100%, 50%) 300deg,
        hsl(360, 100%, 50%) 360deg
    );
    position: relative;
    box-shadow: inset 0 0 0 4px var(--hsvrgb-surface);
    border: 1px solid var(--hsvrgb-border);
}

.hue-thumb {
    position: absolute;
    width: 20px;
    height: 20px;
    left: 50%;
    top: 50%;
    margin-left: -10px;
    margin-top: -10px;
    border: 3px solid #fff;
    border-radius: 50%;
    box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.3);
    pointer-events: none;
    transform-origin: 10px 10px;
}

/* Saturation / Value sliders */
.sv-sliders {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.slider-row {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.slider-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.8125rem;
    color: var(--hsvrgb-muted);
}

.slider-name {
    font-weight: 500;
}

.slider-num {
    font-variant-numeric: tabular-nums;
    color: var(--hsvrgb-text);
}

.hsv-range {
    width: 100%;
    height: 8px;
    border-radius: 4px;
    -webkit-appearance: none;
    appearance: none;
    background: var(--hsvrgb-border);
    outline: none;
}

.hsv-range::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--hsvrgb-accent);
    cursor: pointer;
    border: 2px solid var(--hsvrgb-surface);
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.3);
}

.hsv-range::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--hsvrgb-accent);
    cursor: pointer;
    border: 2px solid var(--hsvrgb-surface);
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.3);
}

.hsv-range:focus-visible {
    outline: none;
}

.hsv-range:focus-visible::-webkit-slider-thumb {
    box-shadow: var(--hsvrgb-focus);
}

.hsv-range:focus-visible::-moz-range-thumb {
    box-shadow: var(--hsvrgb-focus);
}

/* Manual H S V inputs */
.manual-hsv {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.manual-label {
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--hsvrgb-muted);
}

.manual-inputs {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.5rem;
}

.manual-field {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    background: var(--hsvrgb-surface-elevated);
    border: 1px solid var(--hsvrgb-border);
    border-radius: var(--hsvrgb-radius-sm);
    padding: 0 0.5rem;
}

.manual-unit {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--hsvrgb-muted);
    min-width: 1.25em;
}

.manual-input {
    flex: 1;
    min-width: 0;
    background: transparent;
    border: none;
    color: var(--hsvrgb-text);
    font-size: 0.9375rem;
    padding: 0.5rem 0;
    outline: none;
}

.manual-input:focus {
    outline: none;
}

.manual-field:focus-within {
    border-color: var(--hsvrgb-accent);
    box-shadow: var(--hsvrgb-focus);
}

.manual-input::-webkit-inner-spin-button,
.manual-input::-webkit-outer-spin-button {
    opacity: 1;
}

/* Result panel */
.result-panel {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.result-swatch {
    width: 100%;
    min-height: 140px;
    border-radius: var(--hsvrgb-radius);
    border: 2px solid var(--hsvrgb-border);
    box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.08);
    transition: border-color 0.2s ease;
}

.result-swatch:focus {
    outline: none;
}

.rgb-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.5rem;
}

.rgb-card {
    background: var(--hsvrgb-surface-elevated);
    border: 1px solid var(--hsvrgb-border);
    border-radius: var(--hsvrgb-radius-sm);
    padding: 0.75rem;
    text-align: center;
}

.rgb-card-label {
    display: block;
    font-size: 0.6875rem;
    font-weight: 600;
    color: var(--hsvrgb-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.25rem;
}

.rgb-card-num {
    font-size: 1.125rem;
    font-weight: 700;
    font-variant-numeric: tabular-nums;
    color: var(--hsvrgb-text);
}

/* Format chips row */
.format-row {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.format-row-label {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--hsvrgb-muted);
}

.format-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.format-chip {
    display: inline-flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.2rem;
    padding: 0.5rem 0.75rem;
    background: var(--hsvrgb-surface-elevated);
    border: 1px solid var(--hsvrgb-border);
    border-radius: var(--hsvrgb-radius-sm);
    cursor: pointer;
    transition: border-color 0.2s, background 0.2s;
    text-align: left;
}

.format-chip:hover {
    border-color: var(--hsvrgb-accent-dim);
    background: rgba(13, 110, 253, 0.06);
}

.format-chip:focus-visible {
    outline: none;
    border-color: var(--hsvrgb-accent);
    box-shadow: var(--hsvrgb-focus);
}

.chip-tag {
    font-size: 0.6875rem;
    font-weight: 600;
    color: var(--hsvrgb-muted);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.chip-code {
    font-size: 0.8125rem;
    color: var(--hsvrgb-text);
    background: none;
    border: none;
    padding: 0;
}

/* Harmony row */
.harmony-row {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.harmony-label {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--hsvrgb-muted);
}

.harmony-swatches {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.harmony-swatch {
    width: 56px;
    height: 56px;
    border-radius: var(--hsvrgb-radius-sm);
    border: 2px solid var(--hsvrgb-border);
    cursor: pointer;
    transition: transform 0.15s ease, border-color 0.15s ease;
    flex-shrink: 0;
}

.harmony-swatch:hover {
    transform: scale(1.05);
    border-color: var(--hsvrgb-accent);
}

.harmony-swatch:focus-visible {
    outline: none;
    box-shadow: var(--hsvrgb-focus);
}

/* Toast (used by JS) */
.hsvrgb-toast {
    position: fixed;
    bottom: 1.5rem;
    left: 50%;
    transform: translateX(-50%);
    padding: 0.6rem 1rem;
    background: var(--hsvrgb-surface);
    border: 1px solid var(--hsvrgb-accent);
    border-radius: var(--hsvrgb-radius-sm);
    color: var(--hsvrgb-text);
    font-size: 0.875rem;
    z-index: 1000;
    box-shadow: var(--hsvrgb-shadow);
    animation: hsvrgb-toast-in 0.2s ease;
}

@keyframes hsvrgb-toast-in {
    from {
        opacity: 0;
        transform: translateX(-50%) translateY(8px);
    }
    to {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
}