/* ═══════════════════════════════════════════════════════════════════
   UX Polish — Glass Shell Design System Extension
   Skeleton Loading, Empty States, Button Loading, Session Timeout,
   Final Release Polish (consistent transitions, card hierarchy,
   typography density, focus rings, glass morphism)
   ═══════════════════════════════════════════════════════════════════ */

/* ─── 1. Skeleton Loading ─────────────────────────────────────────── */
.gs-skeleton {
    background: var(--slate-64-a15);
    border-radius: 6px;
    position: relative;
    overflow: hidden;
}

.gs-skeleton::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(
        90deg,
        transparent 0%,
        var(--dark-surface-tint) 40%,
        var(--dark-surface-highlight) 50%,
        var(--dark-surface-tint) 60%,
        transparent 100%
    );
    animation: gs-shimmer 1.8s ease-in-out infinite;
}

@keyframes gs-shimmer {
    0%   { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

@media (prefers-reduced-motion: reduce) {
    .gs-skeleton::after {
        animation: none;
        background: var(--dark-surface-card);
    }
}

.gs-skeleton-text {
    height: 14px;
    margin-bottom: 10px;
    width: 80%;
}

.gs-skeleton-text.short { width: 45%; }
.gs-skeleton-text.medium { width: 65%; }
.gs-skeleton-text.long { width: 90%; }
.gs-skeleton-text.full { width: 100%; }

.gs-skeleton-heading {
    height: 22px;
    margin-bottom: 16px;
    width: 50%;
}

.gs-skeleton-card {
    background: var(--dark-surface-1e293b-a50);
    border: 1px solid var(--border-color, var(--slate-700));
    border-radius: 8px;
    padding: 14px;
}

.gs-skeleton-stat {
    height: 32px;
    width: 60px;
    margin: 0 auto;
}

.gs-skeleton-row {
    display: flex;
    gap: 8px;
    align-items: center;
    padding: 10px 0;
    border-bottom: 1px solid var(--dark-surface-card);
}

.gs-skeleton-row:last-child { border-bottom: none; }

.gs-skeleton-badge {
    height: 22px;
    width: 70px;
    border-radius: 4px;
}

.gs-skeleton-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    flex-shrink: 0;
}

.gs-skeleton-table {
    width: 100%;
}

.gs-skeleton-table-header {
    display: flex;
    gap: 8px;
    padding: 10px 0;
    border-bottom: 1px solid var(--dark-border-color);
    margin-bottom: 4px;
}

.gs-skeleton-table-header .gs-skeleton {
    height: 12px;
    flex: 1;
}

.gs-skeleton-table-row {
    display: flex;
    gap: 8px;
    padding: 12px 0;
    border-bottom: 1px solid var(--dark-surface-card);
}

.gs-skeleton-table-row .gs-skeleton {
    height: 14px;
    flex: 1;
}

.gs-skeleton-batch-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 12px;
}

.gs-skeleton-fade-in {
    animation: gs-fade-in 0.3s ease-out;
}

@keyframes gs-fade-in {
    from { opacity: 0; transform: translateY(4px); }
    to   { opacity: 1; transform: translateY(0); }
}

@media (prefers-reduced-motion: reduce) {
    .gs-skeleton-fade-in {
        animation: none;
    }
}


/* ─── 2. Empty States ─────────────────────────────────────────────── */
.gs-empty-state {
    text-align: center;
    padding: 48px 24px;
    color: var(--text-muted, var(--dark-text-mid));
}

.gs-empty-state-icon {
    margin-bottom: 16px;
    opacity: 0.6;
}

.gs-empty-state-icon svg {
    width: 56px;
    height: 56px;
    stroke: var(--text-muted, var(--dark-text-mid));
    fill: none;
    stroke-width: 1.5;
}

.gs-empty-state-title {
    font-size: 17px;
    font-weight: 600;
    color: var(--text-primary, var(--dark-text-light));
    margin-bottom: 8px;
}

.gs-empty-state-message {
    font-size: 14px;
    color: var(--text-secondary, var(--slate-300-alt));
    max-width: 400px;
    margin: 0 auto 20px;
    line-height: 1.5;
}

.gs-empty-state-action {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 20px;
    background: linear-gradient(135deg, var(--rail-accent), var(--accent-purple-vivid));
    color: var(--dark-text-primary);
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.gs-empty-state-action:hover {
    opacity: 0.9;
    transform: var(--lift-sm);
}

.gs-empty-state-action:active {
    transform: translateY(0);
}


/* ─── 3. Button Loading States ────────────────────────────────────── */
.gs-btn-loading {
    position: relative;
    pointer-events: none;
    opacity: 0.75;
}

.gs-btn-loading .gs-btn-spinner {
    display: inline-block;
    width: 14px;
    height: 14px;
    border: 2px solid var(--dark-text-faintest);
    border-top-color: var(--dark-text-primary);
    border-radius: 50%;
    animation: gs-spin 0.6s linear infinite;
    margin-right: 6px;
    vertical-align: middle;
}

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

@media (prefers-reduced-motion: reduce) {
    .gs-btn-loading .gs-btn-spinner {
        animation-duration: 1.5s;
    }
}


/* ─── 4. Session Timeout Warning ──────────────────────────────────── */
.gs-session-warning {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 10010;
    background: linear-gradient(135deg, var(--amber-f5-a95), var(--color-217-119-6-a95));
    color: var(--dark-surface-modal);
    padding: 10px 24px;
    font-size: 14px;
    font-weight: 500;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    transform: translateY(-100%);
    transition: transform var(--transition-slow);
    backdrop-filter: var(--blur-sm);
    -webkit-backdrop-filter: var(--blur-sm);
}

.gs-session-warning.visible {
    transform: translateY(0);
}

.gs-session-warning-btn {
    background: var(--black-a20);
    color: var(--dark-text-primary);
    border: 1px solid var(--black-a20);
    padding: 4px 14px;
    border-radius: 6px;
    font-size: var(--data-size);
    font-weight: 600;
    cursor: pointer;
    transition: background var(--transition-slow);
}

.gs-session-warning-btn:hover {
    background: var(--black-a35);
}

.gs-session-warning-dismiss {
    background: none;
    border: none;
    color: var(--dark-overlay-medium);
    font-size: 18px;
    cursor: pointer;
    padding: 0 4px;
    line-height: 1;
}

@media (prefers-reduced-motion: reduce) {
    .gs-session-warning {
        transition: none;
    }
}


/* ═══════════════════════════════════════════════════════════════════
   5. Final Release Polish — Cross-Cutting Consistency
   ═══════════════════════════════════════════════════════════════════ */

/* ─── 5a. Card Hierarchy — Primary vs Informational ─────────────── */
.card-primary {
    border-color: var(--purple-border-light);
    box-shadow: 0 0 0 1px var(--purple-glow);
}

.card-primary:hover {
    border-color: var(--purple-border-medium);
    box-shadow: 0 4px 20px var(--purple-glow), 0 0 0 1px var(--purple-border-light);
}

/* ─── 5b. Typography Density Enforcement ────────────────────────── */
.gs-label,
.section-label,
.stat-label,
.form-label-text,
.cc-pipe-stat-label,
.cc-sparkline-label,
.cc-briefing-metric-label,
.cc-score-label {
    font-size: var(--label-size);
    font-weight: var(--label-weight);
    text-transform: uppercase;
    letter-spacing: var(--label-spacing);
}

.gs-data-value,
.stat-value-text,
.cc-briefing-summary {
    font-size: var(--data-size);
}

.gs-section-title,
.section-heading,
.cc-logo-text {
    font-size: var(--section-title-size);
}

/* ─── 5c. Consistent Interactive Lift on All Clickable Cards ────── */
a.gs-card,
a.glass-panel,
button.gs-card,
button.glass-panel,
[role="button"].gs-card,
[role="button"].glass-panel {
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

a.gs-card:hover,
a.glass-panel:hover,
button.gs-card:hover,
button.glass-panel:hover,
[role="button"].gs-card:hover,
[role="button"].glass-panel:hover {
    transform: var(--lift-sm);
}

a.gs-card:active,
a.glass-panel:active,
button.gs-card:active,
button.glass-panel:active {
    transform: translateY(0);
}

/* ─── 5d. Consistent Focus Rings for Cards ──────────────────────── */
a.gs-card:focus-visible,
a.glass-panel:focus-visible,
a.cc-panel:focus-visible,
button.gs-card:focus-visible,
button.glass-panel:focus-visible {
    outline: 2px solid var(--accent-purple-light);
    outline-offset: 2px;
    box-shadow: 0 0 0 4px var(--purple-btn-bg);
}

/* ─── 5e. Glass Morphism — Webkit Prefix Guarantee ──────────────── */
.gs-card-elevated {
    backdrop-filter: var(--blur-sm);
    -webkit-backdrop-filter: var(--blur-sm);
}

/* ─── 5f. Badge Consistency ─────────────────────────────────────── */
.gs-badge {
    font-size: var(--label-size);
    font-weight: var(--label-weight);
    letter-spacing: var(--label-spacing);
    border-radius: 4px;
    padding: 2px 8px;
    white-space: nowrap;
    transition: all var(--transition-fast);
}

/* ─── 5g. Smooth Scroll for All Scrollable Containers ───────────── */
.cc-activity-feed,
.cc-main,
#nav-rail,
.gs-scrollable {
    scroll-behavior: smooth;
    -webkit-overflow-scrolling: touch;
}

/* ─── 5h. Mobile Polish at Key Breakpoints ──────────────────────── */
@media (max-width: 390px) {
    .gs-empty-state {
        padding: 32px 16px;
    }
    .gs-empty-state-icon svg {
        width: 40px;
        height: 40px;
    }
    .gs-empty-state-title {
        font-size: 15px;
    }
    .gs-empty-state-message {
        font-size: 13px;
    }
    .gs-empty-state-action {
        width: 100%;
        justify-content: center;
    }
}

@media (max-width: 768px) {
    .gs-skeleton-batch-grid {
        grid-template-columns: 1fr;
    }
    .gs-session-warning {
        padding: 8px 16px;
        font-size: 13px;
        gap: 8px;
    }
    .gs-session-warning-btn {
        padding: 4px 10px;
        font-size: 12px;
    }
}

@media (min-width: 1440px) {
    .gs-skeleton-batch-grid {
        grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    }
}