/*
 * CAISSA UI Foundation
 *
 * Shared, opt-in UI primitives for Season 4 UX work.
 * These styles are intentionally scoped with the caissa-ui prefix so they do
 * not alter existing page layouts until components adopt them explicitly.
 */

:root {
    --caissa-ui-radius: 8px;
    --caissa-ui-border: rgba(148, 163, 184, 0.24);
    --caissa-ui-surface: rgba(15, 23, 42, 0.82);
    --caissa-ui-surface-soft: rgba(30, 41, 59, 0.72);
    --caissa-ui-text: #f8fafc;
    --caissa-ui-text-muted: #cbd5e1;
    --caissa-ui-info: #38bdf8;
    --caissa-ui-success: #22c55e;
    --caissa-ui-warning: #f59e0b;
    --caissa-ui-error: #ef4444;
    --caissa-ui-disabled: #64748b;
    --caissa-ui-focus: #60a5fa;
}

.caissa-ui-panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    min-width: 0;
}

.caissa-ui-panel-title {
    min-width: 0;
    margin: 0;
    color: var(--caissa-ui-text);
    font-size: 0.95rem;
    font-weight: 700;
    letter-spacing: 0.02em;
}

.caissa-ui-panel-actions {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    flex: 0 0 auto;
}

.caissa-ui-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    max-width: 100%;
    min-height: 24px;
    padding: 3px 9px;
    border: 1px solid var(--caissa-ui-border);
    border-radius: 999px;
    background: rgba(148, 163, 184, 0.12);
    color: var(--caissa-ui-text-muted);
    font-size: 0.75rem;
    font-weight: 700;
    line-height: 1.2;
    white-space: nowrap;
}

.caissa-ui-badge__dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: currentColor;
    flex: 0 0 auto;
}

.caissa-ui-badge--success {
    border-color: rgba(34, 197, 94, 0.42);
    background: rgba(34, 197, 94, 0.12);
    color: var(--caissa-ui-success);
}

.caissa-ui-badge--info,
.caissa-ui-badge--connected,
.caissa-ui-badge--observing {
    border-color: rgba(56, 189, 248, 0.42);
    background: rgba(56, 189, 248, 0.12);
    color: var(--caissa-ui-info);
}

.caissa-ui-badge--warning,
.caissa-ui-badge--beta,
.caissa-ui-badge--searching,
.caissa-ui-badge--connecting {
    border-color: rgba(245, 158, 11, 0.42);
    background: rgba(245, 158, 11, 0.12);
    color: var(--caissa-ui-warning);
}

.caissa-ui-badge--error,
.caissa-ui-badge--offline {
    border-color: rgba(239, 68, 68, 0.42);
    background: rgba(239, 68, 68, 0.12);
    color: var(--caissa-ui-error);
}

.caissa-ui-badge--playing {
    border-color: rgba(34, 197, 94, 0.42);
    background: rgba(34, 197, 94, 0.12);
    color: var(--caissa-ui-success);
}

.caissa-ui-badge--disabled,
.caissa-ui-badge--empty,
.caissa-ui-badge--no-results {
    border-color: rgba(100, 116, 139, 0.42);
    background: rgba(100, 116, 139, 0.12);
    color: var(--caissa-ui-disabled);
}

.caissa-ui-spinner {
    display: inline-block;
    width: 18px;
    height: 18px;
    border: 2px solid rgba(203, 213, 225, 0.28);
    border-top-color: var(--caissa-ui-info);
    border-radius: 50%;
    animation: caissa-ui-spin 0.8s linear infinite;
    vertical-align: middle;
}

.caissa-ui-spinner--small {
    width: 14px;
    height: 14px;
    border-width: 2px;
}

.caissa-ui-spinner--large {
    width: 28px;
    height: 28px;
    border-width: 3px;
}

.caissa-ui-button-loading {
    cursor: progress;
}

.caissa-ui-button-loading .caissa-ui-spinner {
    margin-right: 8px;
}

@keyframes caissa-ui-spin {
    to {
        transform: rotate(360deg);
    }
}

.caissa-ui-banner {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 10px 12px;
    border: 1px solid var(--caissa-ui-border);
    border-radius: var(--caissa-ui-radius);
    background: var(--caissa-ui-surface-soft);
    color: var(--caissa-ui-text-muted);
    font-size: 0.88rem;
    line-height: 1.45;
}

.caissa-ui-banner__icon {
    flex: 0 0 auto;
    margin-top: 2px;
}

.caissa-ui-banner__content {
    min-width: 0;
}

.caissa-ui-banner__title {
    margin: 0 0 2px;
    color: var(--caissa-ui-text);
    font-weight: 700;
}

.caissa-ui-banner__message {
    margin: 0;
}

.caissa-ui-banner--success {
    border-color: rgba(34, 197, 94, 0.34);
    background: rgba(34, 197, 94, 0.1);
}

.caissa-ui-banner--success .caissa-ui-banner__icon {
    color: var(--caissa-ui-success);
}

.caissa-ui-banner--info {
    border-color: rgba(56, 189, 248, 0.34);
    background: rgba(56, 189, 248, 0.1);
}

.caissa-ui-banner--info .caissa-ui-banner__icon {
    color: var(--caissa-ui-info);
}

.caissa-ui-banner--warning {
    border-color: rgba(245, 158, 11, 0.34);
    background: rgba(245, 158, 11, 0.1);
}

.caissa-ui-banner--warning .caissa-ui-banner__icon {
    color: var(--caissa-ui-warning);
}

.caissa-ui-banner--error {
    border-color: rgba(239, 68, 68, 0.34);
    background: rgba(239, 68, 68, 0.1);
}

.caissa-ui-banner--error .caissa-ui-banner__icon {
    color: var(--caissa-ui-error);
}

.caissa-ui-empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: 120px;
    padding: 20px;
    border: 1px dashed var(--caissa-ui-border);
    border-radius: var(--caissa-ui-radius);
    background: rgba(15, 23, 42, 0.34);
    color: var(--caissa-ui-text-muted);
    text-align: center;
}

.caissa-ui-empty-state__icon {
    color: var(--caissa-ui-info);
    font-size: 1.2rem;
}

.caissa-ui-empty-state__title {
    margin: 0;
    color: var(--caissa-ui-text);
    font-size: 0.95rem;
    font-weight: 700;
}

.caissa-ui-empty-state__message {
    max-width: 46ch;
    margin: 0;
    font-size: 0.86rem;
    line-height: 1.45;
}

.caissa-ui-empty-state--compact {
    min-height: 72px;
    padding: 12px;
    gap: 6px;
}

.caissa-ui-empty-state--compact .caissa-ui-empty-state__title {
    font-size: 0.88rem;
}

.caissa-ui-empty-state--compact .caissa-ui-empty-state__message {
    font-size: 0.8rem;
}

.caissa-ui-tooltip-host {
    position: relative;
}

.caissa-ui-tooltip-host[data-caissa-tooltip]::after {
    content: attr(data-caissa-tooltip);
    position: absolute;
    left: 50%;
    bottom: calc(100% + 8px);
    z-index: 50;
    max-width: 220px;
    padding: 6px 8px;
    border: 1px solid var(--caissa-ui-border);
    border-radius: 6px;
    background: rgba(2, 6, 23, 0.96);
    color: var(--caissa-ui-text);
    font-size: 0.75rem;
    line-height: 1.3;
    text-align: center;
    white-space: normal;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.28);
    opacity: 0;
    pointer-events: none;
    transform: translate(-50%, 4px);
    transition: opacity 0.15s ease, transform 0.15s ease;
}

.caissa-ui-tooltip-host[data-caissa-tooltip]:hover::after,
.caissa-ui-tooltip-host[data-caissa-tooltip]:focus-visible::after {
    opacity: 1;
    transform: translate(-50%, 0);
}

.caissa-ui-focus-ring:focus-visible {
    outline: 2px solid var(--caissa-ui-focus);
    outline-offset: 2px;
}

:where(button, a, input, select, textarea, [tabindex]):focus-visible {
    outline: 2px solid var(--caissa-ui-focus);
    outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
    .caissa-ui-spinner {
        animation-duration: 1.4s;
    }

    .caissa-ui-tooltip-host[data-caissa-tooltip]::after {
        transition: none;
    }
}