/**
 * Frontend styles for the Chronological Age Calculator.
 * Mobile-first approach — base styles for mobile, @media for larger screens.
 *
 * @package ChronologicalAgeCalculator
 */

/* ============================================================
   CSS Custom Properties
   ============================================================ */

.cac-wrapper {
    --cac-primary:       #2563EB;
    --cac-primary-hover: #1D4ED8;
    --cac-bg:            #F8FAFC;
    --cac-card-bg:       #FFFFFF;
    --cac-card-shadow:   0 1px 3px rgba(0, 0, 0, 0.08), 0 8px 24px rgba(0, 0, 0, 0.06);
    --cac-radius:        16px;
    --cac-radius-sm:     8px;
    --cac-text:          #1E293B;
    --cac-text-muted:    #64748B;
    --cac-border:        #E2E8F0;
    --cac-success:       #059669;
    --cac-error:         #DC2626;
    --cac-font-display:  'Bricolage Grotesque', Georgia, serif;
    --cac-font-body:     'DM Sans', system-ui, sans-serif;
    --cac-transition:    0.2s ease;

    font-family: var(--cac-font-body);
    max-width: 860px;
    margin: 0 auto;
    padding: 16px;
    background: var(--cac-bg);
    border-radius: var(--cac-radius);
    color: var(--cac-text);
    box-sizing: border-box;
}

.cac-wrapper *,
.cac-wrapper *::before,
.cac-wrapper *::after {
    box-sizing: inherit;
}

/* ============================================================
   Title
   ============================================================ */

.cac-title {
    font-family: var(--cac-font-display);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--cac-text);
    margin: 0 0 20px;
    text-align: center;
}

/* ============================================================
   Card
   ============================================================ */

.cac-card {
    background: var(--cac-card-bg);
    border-radius: var(--cac-radius);
    box-shadow: var(--cac-card-shadow);
    padding: 24px;
    margin-bottom: 20px;
}

/* ============================================================
   Inputs
   ============================================================ */

.cac-inputs {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
    margin-bottom: 20px;
}

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

.cac-field {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.cac-label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--cac-text);
}

.cac-input-date {
    width: 100%;
    padding: 10px 14px;
    border: 1.5px solid var(--cac-border);
    border-radius: var(--cac-radius-sm);
    font-family: var(--cac-font-body);
    font-size: 1rem;
    color: var(--cac-text);
    background: #fff;
    transition: border-color var(--cac-transition), box-shadow var(--cac-transition);
    appearance: none;
}

.cac-input-date:focus {
    outline: none;
    border-color: var(--cac-primary);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--cac-primary) 20%, transparent);
}

.cac-input-date:focus-visible {
    outline: 2px solid var(--cac-primary);
    outline-offset: 2px;
}

/* ============================================================
   Adjusted age note
   ============================================================ */

.cac-adjusted-note {
    font-size: 0.8125rem;
    color: var(--cac-text-muted);
    margin-bottom: 16px;
    padding: 10px 14px;
    background: color-mix(in srgb, var(--cac-primary) 8%, transparent);
    border-left: 3px solid var(--cac-primary);
    border-radius: 0 var(--cac-radius-sm) var(--cac-radius-sm) 0;
}

/* ============================================================
   Presets
   ============================================================ */

.cac-presets {
    display: flex;
    flex-wrap: nowrap;
    gap: 8px;
    overflow-x: auto;
    margin-bottom: 20px;
    padding-bottom: 4px;
    scrollbar-width: none;
}

.cac-presets::-webkit-scrollbar {
    display: none;
}

.cac-preset-label {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--cac-text-muted);
    white-space: nowrap;
    align-self: center;
    flex-shrink: 0;
}

.cac-btn-preset {
    padding: 6px 14px;
    border: 1.5px solid var(--cac-border);
    border-radius: 999px;
    background: transparent;
    color: var(--cac-text-muted);
    font-family: var(--cac-font-body);
    font-size: 0.8125rem;
    cursor: pointer;
    white-space: nowrap;
    flex-shrink: 0;
    transition: border-color var(--cac-transition), color var(--cac-transition), background var(--cac-transition);
}

.cac-btn-preset:hover {
    border-color: var(--cac-primary);
    color: var(--cac-primary);
    background: color-mix(in srgb, var(--cac-primary) 8%, transparent);
}

.cac-btn-preset:focus-visible {
    outline: 2px solid var(--cac-primary);
    outline-offset: 2px;
}

/* ============================================================
   Actions
   ============================================================ */

.cac-actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.cac-btn-primary {
    padding: 12px 28px;
    border: none;
    border-radius: 999px;
    background: var(--cac-primary);
    color: #fff;
    font-family: var(--cac-font-body);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: background var(--cac-transition), transform var(--cac-transition), box-shadow var(--cac-transition);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.cac-btn-primary:hover {
    background: var(--cac-primary-hover);
    box-shadow: 0 4px 12px color-mix(in srgb, var(--cac-primary) 40%, transparent);
}

.cac-btn-primary:active {
    transform: scale(0.98);
}

.cac-btn-primary:focus-visible {
    outline: 2px solid var(--cac-primary);
    outline-offset: 3px;
}

.cac-btn-primary:disabled {
    opacity: 0.65;
    cursor: not-allowed;
    transform: none;
}

.cac-btn-text {
    display: inline-block;
}

.cac-btn-loading {
    display: none;
}

.cac-btn-primary.cac-is-loading .cac-btn-text {
    display: none;
}

.cac-btn-primary.cac-is-loading .cac-btn-loading {
    display: inline-block;
}

.cac-btn-secondary {
    padding: 12px 24px;
    border: 1.5px solid var(--cac-border);
    border-radius: 999px;
    background: transparent;
    color: var(--cac-text-muted);
    font-family: var(--cac-font-body);
    font-size: 1rem;
    cursor: pointer;
    transition: border-color var(--cac-transition), color var(--cac-transition);
}

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

.cac-btn-secondary:focus-visible {
    outline: 2px solid var(--cac-primary);
    outline-offset: 2px;
}

/* ============================================================
   Error
   ============================================================ */

.cac-error-msg {
    margin-top: 16px;
    padding: 12px 16px;
    background: color-mix(in srgb, var(--cac-error) 8%, transparent);
    border: 1.5px solid color-mix(in srgb, var(--cac-error) 40%, transparent);
    border-radius: var(--cac-radius-sm);
    color: var(--cac-error);
    font-size: 0.875rem;
    display: flex;
    align-items: flex-start;
    gap: 8px;
}

.cac-error-msg::before {
    content: '⚠';
    flex-shrink: 0;
}

/* ============================================================
   Results
   ============================================================ */

.cac-results {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.cac-result-primary {
    background: var(--cac-card-bg);
    border-radius: var(--cac-radius);
    box-shadow: var(--cac-card-shadow);
    padding: 32px 24px;
    text-align: center;
}

.cac-result-primary__label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--cac-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 16px;
}

.cac-result-primary__numbers {
    display: flex;
    justify-content: center;
    gap: 32px;
    flex-wrap: wrap;
}

.cac-result-primary__unit {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

.cac-result-primary__number {
    font-family: var(--cac-font-display);
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 600;
    color: var(--cac-primary);
    line-height: 1;
}

.cac-result-primary__unit-label {
    font-size: 0.75rem;
    color: var(--cac-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.cac-divider {
    font-family: var(--cac-font-display);
    font-size: 2rem;
    color: var(--cac-border);
    align-self: center;
}

/* ============================================================
   Results Grid
   ============================================================ */

.cac-results-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

@media (min-width: 768px) {
    .cac-results-grid {
        grid-template-columns: 1fr 1fr 1fr;
    }
}

.cac-result-card {
    background: var(--cac-card-bg);
    border-radius: var(--cac-radius-sm);
    box-shadow: var(--cac-card-shadow);
    padding: 16px;
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.cac-result-card__value {
    font-family: var(--cac-font-display);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--cac-text);
}

.cac-result-card__label {
    font-size: 0.75rem;
    color: var(--cac-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

/* ============================================================
   Y;M;D card with copy
   ============================================================ */

.cac-ymd-card {
    background: var(--cac-card-bg);
    border-radius: var(--cac-radius-sm);
    box-shadow: var(--cac-card-shadow);
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    align-items: center;
}

.cac-ymd {
    font-family: 'Courier New', Courier, monospace;
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--cac-primary);
    letter-spacing: 0.04em;
}

.cac-ymd-label {
    font-size: 0.75rem;
    color: var(--cac-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.cac-copy-btn {
    padding: 4px 12px;
    border: 1.5px solid var(--cac-border);
    border-radius: 999px;
    background: transparent;
    color: var(--cac-text-muted);
    font-size: 0.75rem;
    cursor: pointer;
    transition: border-color var(--cac-transition), color var(--cac-transition);
}

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

.cac-copy-btn:focus-visible {
    outline: 2px solid var(--cac-primary);
    outline-offset: 2px;
}

/* ============================================================
   Countdown
   ============================================================ */

.cac-countdown-card {
    background: var(--cac-card-bg);
    border-radius: var(--cac-radius);
    box-shadow: var(--cac-card-shadow);
    padding: 24px;
    text-align: center;
}

.cac-countdown-card__label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--cac-text-muted);
    margin-bottom: 16px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.cac-countdown-timer {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}

.cac-countdown-unit {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    min-width: 56px;
}

.cac-countdown-number {
    font-family: var(--cac-font-display);
    font-size: 2rem;
    font-weight: 600;
    color: var(--cac-primary);
    line-height: 1;
    min-width: 2.5ch;
    text-align: center;
}

.cac-countdown-label {
    font-size: 0.6875rem;
    color: var(--cac-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.cac-countdown-sep {
    font-size: 2rem;
    color: var(--cac-border);
    align-self: flex-start;
    padding-top: 4px;
}

/* ============================================================
   Fun facts row (zodiac, birthstone, day born)
   ============================================================ */

.cac-facts-row {
    display: grid;
    grid-template-columns: 1fr;
    gap: 12px;
}

@media (min-width: 640px) {
    .cac-facts-row {
        grid-template-columns: repeat(3, 1fr);
    }
}

.cac-fact-card {
    background: var(--cac-card-bg);
    border-radius: var(--cac-radius-sm);
    box-shadow: var(--cac-card-shadow);
    padding: 20px 16px;
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 6px;
    align-items: center;
}

.cac-fact-card__icon {
    font-size: 2rem;
    line-height: 1;
}

.cac-fact-card__value {
    font-family: var(--cac-font-display);
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--cac-text);
}

.cac-fact-card__label {
    font-size: 0.75rem;
    color: var(--cac-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

/* ============================================================
   Toast notification
   ============================================================ */

.cac-toast {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 9999;
    padding: 12px 20px;
    background: var(--cac-success);
    color: #fff;
    border-radius: var(--cac-radius-sm);
    font-size: 0.875rem;
    font-weight: 500;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    transform: translateY(0);
    opacity: 1;
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.cac-toast[hidden] {
    display: block !important;
    opacity: 0;
    transform: translateY(8px);
    pointer-events: none;
    visibility: hidden;
}

/* ============================================================
   Ad slots
   ============================================================ */

.cac-ad-slot {
    text-align: center;
    margin-bottom: 20px;
    max-width: 100%;
    overflow: hidden;
}

.cac-ad-slot > * {
    max-width: 100%;
}

/* ============================================================
   Theme: Minimal
   ============================================================ */

.cac-theme-minimal .cac-card,
.cac-theme-minimal .cac-result-primary,
.cac-theme-minimal .cac-result-card,
.cac-theme-minimal .cac-ymd-card,
.cac-theme-minimal .cac-countdown-card,
.cac-theme-minimal .cac-fact-card {
    box-shadow: none;
    border: 1.5px solid var(--cac-border);
}

.cac-theme-minimal {
    background: transparent;
}

/* ============================================================
   Theme: Clinical
   ============================================================ */

.cac-theme-clinical {
    --cac-primary:       #374151;
    --cac-primary-hover: #1f2937;
    --cac-bg:            #f9fafb;
    --cac-font-display:  'DM Sans', system-ui, sans-serif;
    border-radius: var(--cac-radius-sm);
}

.cac-theme-clinical .cac-card,
.cac-theme-clinical .cac-result-primary,
.cac-theme-clinical .cac-result-card,
.cac-theme-clinical .cac-ymd-card,
.cac-theme-clinical .cac-countdown-card,
.cac-theme-clinical .cac-fact-card {
    border-radius: 4px;
    box-shadow: none;
    border: 1px solid var(--cac-border);
}

.cac-theme-clinical .cac-result-primary__number,
.cac-theme-clinical .cac-result-card__value,
.cac-theme-clinical .cac-ymd,
.cac-theme-clinical .cac-countdown-number {
    color: var(--cac-primary);
}

/* ============================================================
   Print styles
   ============================================================ */

@media print {
    .cac-presets,
    .cac-actions,
    .cac-toast,
    .cac-ad-slot,
    .cac-btn-secondary,
    .cac-copy-btn,
    .cac-countdown-card {
        display: none !important;
    }

    .cac-wrapper {
        background: transparent;
        padding: 0;
        max-width: 100%;
    }

    .cac-result-primary {
        box-shadow: none;
        border: 1px solid #ccc;
    }

    .cac-result-primary__number {
        color: #000;
    }
}

/* ============================================================
   Reduced motion
   ============================================================ */

@media (prefers-reduced-motion: reduce) {
    .cac-wrapper *,
    .cac-wrapper *::before,
    .cac-wrapper *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    .cac-toast {
        transition: none;
    }
}