/* ===== MMNTM Shared UI Components =====
   Consistent loading, error, empty states and utilities
   Include in all page templates for unified UX
*/

/* ===== CSS VARIABLES (inherited from nav.html) ===== */
:root {
    /* Backgrounds */
    --bg-deep: #05080f;
    --bg-surface: #0a0f18;
    --bg-elevated: #111827;
    --bg-card: #0f1521;

    /* Borders */
    --border-subtle: #1e293b;
    --border-accent: #334155;

    /* Text */
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;

    /* Accents */
    --accent-cyan: #22d3ee;
    --accent-green: #10b981;
    --accent-red: #ef4444;
    --accent-amber: #f59e0b;
    --accent-purple: #a855f7;

    /* Glows */
    --glow-cyan: rgba(34, 211, 238, 0.15);
    --glow-green: rgba(16, 185, 129, 0.15);
    --glow-red: rgba(239, 68, 68, 0.15);
    --glow-amber: rgba(245, 158, 11, 0.15);
}

/* ===== LOADING STATES ===== */

/* Standard loading container */
.ui-loading {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    padding: 2rem;
    color: var(--text-muted);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
}

/* Animated spinner */
.ui-spinner {
    width: 18px;
    height: 18px;
    border: 2px solid var(--border-subtle);
    border-top-color: var(--accent-cyan);
    border-radius: 50%;
    animation: ui-spin 0.8s linear infinite;
}

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

/* Skeleton loading placeholders */
.ui-skeleton {
    background: linear-gradient(
        90deg,
        var(--bg-card) 25%,
        var(--bg-elevated) 50%,
        var(--bg-card) 75%
    );
    background-size: 200% 100%;
    animation: ui-shimmer 1.5s ease-in-out infinite;
    border-radius: 4px;
}

.ui-skeleton-text {
    height: 1rem;
    margin-bottom: 0.5rem;
}

.ui-skeleton-text:last-child {
    width: 60%;
}

.ui-skeleton-title {
    height: 1.5rem;
    width: 70%;
    margin-bottom: 1rem;
}

.ui-skeleton-card {
    height: 80px;
    margin-bottom: 0.5rem;
}

@keyframes ui-shimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* Inline loading indicator */
.ui-loading-inline {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-muted);
    font-size: 0.8rem;
}

.ui-loading-inline .ui-spinner {
    width: 14px;
    height: 14px;
}

/* ===== ERROR STATES ===== */

.ui-error {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    text-align: center;
    background: var(--glow-red);
    border: 1px solid rgba(239, 68, 68, 0.3);
    border-radius: 6px;
}

.ui-error-icon {
    font-size: 2rem;
    margin-bottom: 0.75rem;
    color: var(--accent-red);
}

.ui-error-title {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.ui-error-message {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
    max-width: 400px;
}

.ui-error-action {
    padding: 0.5rem 1rem;
    background: transparent;
    border: 1px solid var(--accent-red);
    color: var(--accent-red);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.8rem;
    cursor: pointer;
    transition: all 0.15s;
}

.ui-error-action:hover {
    background: var(--accent-red);
    color: var(--bg-deep);
}

/* Inline error */
.ui-error-inline {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    background: var(--glow-red);
    border-left: 3px solid var(--accent-red);
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.ui-error-inline code {
    background: rgba(0, 0, 0, 0.3);
    padding: 0.1rem 0.4rem;
    border-radius: 3px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.8rem;
}

/* ===== EMPTY STATES ===== */

.ui-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 3rem 2rem;
    text-align: center;
}

.ui-empty-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    color: var(--text-muted);
    opacity: 0.5;
}

.ui-empty-title {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.ui-empty-message {
    font-size: 0.9rem;
    color: var(--text-muted);
    max-width: 320px;
    line-height: 1.5;
}

.ui-empty-suggestions {
    margin-top: 1.5rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    justify-content: center;
}

.ui-empty-suggestion {
    padding: 0.4rem 0.8rem;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    color: var(--text-secondary);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
    cursor: pointer;
    transition: all 0.15s;
}

.ui-empty-suggestion:hover {
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
}

/* ===== SUCCESS STATES ===== */

.ui-success {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem;
    background: var(--glow-green);
    border: 1px solid rgba(16, 185, 129, 0.3);
    border-radius: 6px;
    color: var(--accent-green);
}

.ui-success-inline {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--accent-green);
    font-size: 0.85rem;
}

/* ===== UTILITY CLASSES ===== */

/* Flex utilities */
.u-flex { display: flex; }
.u-flex-col { flex-direction: column; }
.u-flex-wrap { flex-wrap: wrap; }
.u-items-center { align-items: center; }
.u-items-start { align-items: flex-start; }
.u-items-end { align-items: flex-end; }
.u-justify-center { justify-content: center; }
.u-justify-between { justify-content: space-between; }
.u-gap-xs { gap: 0.25rem; }
.u-gap-sm { gap: 0.5rem; }
.u-gap-md { gap: 1rem; }
.u-gap-lg { gap: 1.5rem; }
.u-flex-1 { flex: 1; }
.u-flex-shrink-0 { flex-shrink: 0; }
.u-min-w-0 { min-width: 0; }

/* Spacing utilities */
.u-m-0 { margin: 0; }
.u-mt-sm { margin-top: 0.5rem; }
.u-mt-md { margin-top: 1rem; }
.u-mt-lg { margin-top: 1.5rem; }
.u-mb-sm { margin-bottom: 0.5rem; }
.u-mb-md { margin-bottom: 1rem; }
.u-mb-lg { margin-bottom: 1.5rem; }
.u-mr-sm { margin-right: 0.5rem; }
.u-mr-md { margin-right: 1rem; }
.u-ml-sm { margin-left: 0.5rem; }
.u-ml-md { margin-left: 1rem; }
.u-p-sm { padding: 0.5rem; }
.u-p-md { padding: 1rem; }
.u-p-lg { padding: 1.5rem; }

/* Text utilities */
.u-text-muted { color: var(--text-muted); }
.u-text-secondary { color: var(--text-secondary); }
.u-text-primary { color: var(--text-primary); }
.u-text-cyan { color: var(--accent-cyan); }
.u-text-green { color: var(--accent-green); }
.u-text-red { color: var(--accent-red); }
.u-text-amber { color: var(--accent-amber); }
.u-text-purple { color: var(--accent-purple); }
.u-text-sm { font-size: 0.85rem; }
.u-text-xs { font-size: 0.75rem; }
.u-text-mono { font-family: 'JetBrains Mono', monospace; }
.u-text-center { text-align: center; }
.u-font-medium { font-weight: 500; }
.u-font-semibold { font-weight: 600; }
.u-uppercase { text-transform: uppercase; }
.u-truncate {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* Width utilities */
.u-w-full { width: 100%; }
.u-min-w-120 { min-width: 120px; }
.u-min-w-140 { min-width: 140px; }
.u-min-w-160 { min-width: 160px; }

/* ===== BUTTONS ===== */

.ui-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
    font-weight: 500;
    border: 1px solid var(--border-subtle);
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.15s;
}

.ui-btn:hover {
    border-color: var(--accent-cyan);
    color: var(--text-primary);
}

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

.ui-btn-primary {
    background: var(--accent-cyan);
    border-color: var(--accent-cyan);
    color: var(--bg-deep);
}

.ui-btn-primary:hover {
    background: #38e0f5;
    border-color: #38e0f5;
    color: var(--bg-deep);
}

.ui-btn-danger {
    border-color: var(--accent-red);
    color: var(--accent-red);
}

.ui-btn-danger:hover {
    background: var(--accent-red);
    color: var(--bg-deep);
}

.ui-btn-sm {
    padding: 0.35rem 0.75rem;
    font-size: 0.75rem;
}

.ui-btn-icon {
    width: 32px;
    height: 32px;
    padding: 0;
}

/* ===== BADGES & TAGS ===== */

.ui-badge {
    display: inline-flex;
    align-items: center;
    padding: 0.2rem 0.5rem;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.65rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-radius: 3px;
    background: var(--bg-elevated);
    color: var(--text-muted);
}

.ui-badge-cyan {
    background: var(--glow-cyan);
    color: var(--accent-cyan);
}

.ui-badge-green {
    background: var(--glow-green);
    color: var(--accent-green);
}

.ui-badge-red {
    background: var(--glow-red);
    color: var(--accent-red);
}

.ui-badge-amber {
    background: var(--glow-amber);
    color: var(--accent-amber);
}

.ui-badge-new {
    background: var(--accent-cyan);
    color: var(--bg-deep);
}

/* ===== CARDS ===== */

.ui-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    padding: 1.25rem;
    transition: border-color 0.15s;
}

.ui-card:hover {
    border-color: var(--border-accent);
}

.ui-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1rem;
}

.ui-card-title {
    font-weight: 600;
    color: var(--text-primary);
}

/* ===== TABS ===== */

.ui-tabs {
    display: flex;
    gap: 0.25rem;
    border-bottom: 1px solid var(--border-subtle);
    margin-bottom: 1rem;
}

.ui-tab {
    padding: 0.6rem 1rem;
    background: transparent;
    border: none;
    border-bottom: 2px solid transparent;
    color: var(--text-muted);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.8rem;
    cursor: pointer;
    transition: all 0.15s;
}

.ui-tab:hover {
    color: var(--text-primary);
}

.ui-tab[aria-selected="true"],
.ui-tab.active {
    color: var(--accent-cyan);
    border-bottom-color: var(--accent-cyan);
}

/* Keyboard focus styles */
.ui-tab:focus {
    outline: none;
    box-shadow: inset 0 0 0 2px var(--accent-cyan);
}

/* ===== INPUTS ===== */

.ui-input {
    width: 100%;
    padding: 0.6rem 0.8rem;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    color: var(--text-primary);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.9rem;
    transition: border-color 0.15s;
}

.ui-input:focus {
    outline: none;
    border-color: var(--accent-cyan);
}

.ui-input::placeholder {
    color: var(--text-muted);
}

.ui-select {
    padding: 0.6rem 0.8rem;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    color: var(--text-primary);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
    cursor: pointer;
}

.ui-select:focus {
    outline: none;
    border-color: var(--accent-cyan);
}

/* ===== KEYBOARD SHORTCUTS ===== */

.ui-kbd {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 20px;
    padding: 0.15rem 0.4rem;
    background: var(--bg-elevated);
    border: 1px solid var(--border-subtle);
    border-radius: 3px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.7rem;
    color: var(--text-muted);
}

/* ===== TOOLTIPS ===== */

.ui-tooltip {
    position: relative;
    cursor: help;
}

.ui-tooltip::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(-4px);
    padding: 0.4rem 0.6rem;
    background: var(--bg-elevated);
    border: 1px solid var(--border-subtle);
    color: var(--text-secondary);
    font-size: 0.75rem;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: all 0.15s;
    z-index: 100;
}

.ui-tooltip:hover::after {
    opacity: 1;
    visibility: visible;
}

/* Rich Tooltip - for multi-line explanations */
.ui-tooltip-rich {
    position: relative;
    cursor: help;
}

.ui-tooltip-rich .tooltip-trigger {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
}

.ui-tooltip-rich .tooltip-icon {
    width: 14px;
    height: 14px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 10px;
    color: var(--text-muted);
    border: 1px solid var(--border-subtle);
    border-radius: 50%;
    opacity: 0.6;
    transition: all 0.15s;
}

.ui-tooltip-rich:hover .tooltip-icon {
    opacity: 1;
    color: var(--accent-cyan);
    border-color: var(--accent-cyan);
}

.ui-tooltip-rich .tooltip-content {
    position: absolute;
    bottom: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%);
    width: 280px;
    padding: 0.875rem;
    background: var(--bg-elevated);
    border: 1px solid var(--border-accent);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.4);
    opacity: 0;
    visibility: hidden;
    transition: all 0.15s;
    z-index: 200;
}

.ui-tooltip-rich:hover .tooltip-content {
    opacity: 1;
    visibility: visible;
}

.ui-tooltip-rich .tooltip-content::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 6px solid transparent;
    border-top-color: var(--border-accent);
}

.tooltip-title {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    font-size: 0.85rem;
}

.tooltip-desc {
    color: var(--text-secondary);
    font-size: 0.8rem;
    line-height: 1.5;
    margin-bottom: 0.75rem;
}

.tooltip-example {
    padding: 0.5rem;
    background: var(--bg-card);
    border-left: 2px solid var(--accent-cyan);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
    color: var(--text-muted);
}

.tooltip-example strong {
    color: var(--accent-cyan);
}

.tooltip-percentile {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 0.75rem;
    padding-top: 0.5rem;
    border-top: 1px solid var(--border-subtle);
    font-size: 0.75rem;
    color: var(--text-muted);
}

.tooltip-percentile-bar {
    flex: 1;
    height: 4px;
    background: var(--bg-card);
    border-radius: 2px;
    position: relative;
}

.tooltip-percentile-fill {
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    background: var(--accent-cyan);
    border-radius: 2px;
}

.tooltip-percentile-marker {
    position: absolute;
    top: -3px;
    width: 10px;
    height: 10px;
    background: var(--accent-cyan);
    border: 2px solid var(--bg-elevated);
    border-radius: 50%;
    transform: translateX(-50%);
}

/* ===== METRIC HELP ICON ===== */
.metric-help {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 14px;
    height: 14px;
    margin-left: 0.25rem;
    font-size: 9px;
    color: var(--text-muted);
    border: 1px solid var(--border-subtle);
    border-radius: 50%;
    cursor: help;
    opacity: 0;
    transition: opacity 0.15s;
}

.metric-item:hover .metric-help {
    opacity: 0.6;
}

.metric-help:hover {
    opacity: 1 !important;
    color: var(--accent-cyan);
    border-color: var(--accent-cyan);
}

/* ===== ENTITY PROFILE LINK ===== */
.entity-link {
    color: var(--text-primary);
    text-decoration: none;
    transition: color 0.15s;
    cursor: pointer;
}

.entity-link:hover {
    color: var(--accent-cyan);
}

.entity-link::after {
    content: ' →';
    opacity: 0;
    transition: opacity 0.15s;
}

.entity-link:hover::after {
    opacity: 0.6;
}

/* ===== FOCUS & ACCESSIBILITY ===== */

/* Visible focus for keyboard navigation */
:focus-visible {
    outline: 2px solid var(--accent-cyan);
    outline-offset: 2px;
}

/* Skip link for accessibility */
.ui-skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    padding: 0.5rem 1rem;
    background: var(--accent-cyan);
    color: var(--bg-deep);
    font-weight: 600;
    z-index: 1000;
    transition: top 0.2s;
}

.ui-skip-link:focus {
    top: 0;
}

/* Screen reader only text */
.ui-sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ===== ANIMATIONS ===== */

@keyframes ui-fade-in {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes ui-slide-up {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes ui-pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.ui-animate-fade-in {
    animation: ui-fade-in 0.2s ease-out;
}

.ui-animate-slide-up {
    animation: ui-slide-up 0.25s ease-out;
}

.ui-animate-pulse {
    animation: ui-pulse 2s ease-in-out infinite;
}