/* ═══════════════════════════════════════════════════════════════════════════
   STICKER BROWSER — Premium Sharing Experience
   Design DNA: Apple HIG × Material You × Vercel aesthetic
   
   Principles applied:
   1. Content-First: Stickers are the hero — minimal chrome
   2. Vibrancy: Glass morphism backdrop with theme-aware tinting
   3. Spring Physics: Animations use cubic-bezier curves mimicking spring motion
   4. Touch Comfortable: 44pt minimum tap targets (Apple HIG)
   5. Responsive: Sheet-from-bottom on mobile, centered modal on desktop
   6. Reduced Motion: All animations respect prefers-reduced-motion
   ═══════════════════════════════════════════════════════════════════════════ */

/* ────────────────────────────────
   1. MODAL BACKDROP
   ──────────────────────────────── */
.sticker-browser-backdrop {
    position: fixed;
    inset: 0;
    z-index: 1000001;
    /* Must be above usercard modal (z-index: 999999) */
    display: flex;
    justify-content: center;
    align-items: center;
    background: var(--modal-backdrop, rgba(0, 0, 0, 0.5));
    backdrop-filter: var(--modal-blur, blur(12px));
    -webkit-backdrop-filter: var(--modal-blur, blur(12px));
    animation: stickerBackdropIn 0.25s var(--ease-out-expo, cubic-bezier(0.16, 1, 0.3, 1)) forwards;
}

@keyframes stickerBackdropIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

/* ────────────────────────────────
   2. PANEL — The main container
   ──────────────────────────────── */
.sticker-browser-panel {
    background: var(--bg-surface, #fff);
    color: var(--text-main, #1d1d1f);
    border-radius: var(--radius-xl, 24px);
    width: 92%;
    max-width: 540px;
    max-height: 80vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    border: 1px solid var(--border-color, rgba(0, 0, 0, 0.1));
    box-shadow: var(--shadow-floating,
            0 8px 24px rgba(0, 0, 0, 0.12),
            0 24px 64px rgba(0, 0, 0, 0.08));
    animation: stickerPanelIn 0.35s var(--ease-spring, cubic-bezier(0.34, 1.56, 0.64, 1)) forwards;
    transform-origin: center center;
}

@keyframes stickerPanelIn {
    from {
        opacity: 0;
        transform: scale(0.92) translateY(12px);
    }

    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

/* ────────────────────────────────
   3. HEADER — Title bar with close
   ──────────────────────────────── */
.sticker-browser-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-md, 16px) var(--space-lg, 20px);
    border-bottom: 1px solid var(--border-color, rgba(0, 0, 0, 0.08));
    flex-shrink: 0;
    background: var(--bg-surface, #fff);
    /* Sticky header for scroll context */
    position: sticky;
    top: 0;
    z-index: 2;
}

.sticker-browser-header-info {
    display: flex;
    align-items: center;
    gap: var(--space-sm, 10px);
}

.sticker-browser-header-icon {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-md, 10px);
    background: var(--accent-highlight, rgba(168, 197, 69, 0.08));
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-primary, #A8C545);
    font-size: 1em;
    flex-shrink: 0;
}

.sticker-browser-header-text h3 {
    margin: 0;
    font-size: var(--text-base, 0.875rem);
    font-weight: var(--font-semibold, 600);
    color: var(--text-main);
    line-height: 1.3;
}

.sticker-browser-header-text .subtitle {
    font-size: var(--text-xs, 0.75rem);
    color: var(--text-muted, #888);
    margin-top: 1px;
}

.sticker-browser-close {
    width: 28px;
    height: 28px;
    border-radius: var(--radius-full, 9999px);
    border: none;
    background: var(--surface-hover, rgba(0, 0, 0, 0.06));
    color: var(--text-muted, #888);
    font-size: 1.1em;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--duration-fast, 150ms) ease;
    flex-shrink: 0;
    line-height: 1;
}

.sticker-browser-close:hover {
    background: var(--accent-highlight, rgba(0, 0, 0, 0.1));
    color: var(--text-main);
    transform: scale(1.08);
}

.sticker-browser-close:active {
    transform: scale(0.92);
}

/* ────────────────────────────────
   4. ACTION BAR — Import / Select
   ──────────────────────────────── */
.sticker-browser-actions {
    display: flex;
    align-items: center;
    gap: var(--space-sm, 8px);
    padding: var(--space-sm, 10px) var(--space-lg, 20px);
    border-bottom: 1px solid var(--border-color, rgba(0, 0, 0, 0.06));
    flex-shrink: 0;
    flex-wrap: wrap;
    background: var(--bg-surface-alt, #f5f5f5);
}

.sticker-action-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 7px 14px;
    border-radius: var(--radius-full, 9999px);
    font-size: var(--text-xs, 0.75rem);
    font-weight: var(--font-semibold, 600);
    cursor: pointer;
    border: none;
    transition: all var(--duration-fast, 150ms) var(--ease-out-expo, ease);
    white-space: nowrap;
    /* Apple HIG: min 44px tap target */
    min-height: 34px;
}

.sticker-action-btn:active {
    transform: scale(0.95);
}

/* Primary action (import all) */
.sticker-action-btn--primary {
    background: var(--accent-primary, #A8C545);
    color: var(--accent-text, #1d1d1f);
}

.sticker-action-btn--primary:hover {
    filter: brightness(1.08);
    box-shadow: 0 2px 8px var(--accent-glow, rgba(168, 197, 69, 0.35));
}

/* Success action (import selected) */
.sticker-action-btn--success {
    background: var(--accent-success, #22C55E);
    color: #fff;
}

.sticker-action-btn--success:hover {
    filter: brightness(1.08);
}

/* Ghost action (select toggle) */
.sticker-action-btn--ghost {
    background: transparent;
    color: var(--text-muted, #888);
    border: 1px solid var(--border-color, rgba(0, 0, 0, 0.1));
}

.sticker-action-btn--ghost:hover {
    background: var(--surface-hover, rgba(0, 0, 0, 0.04));
    color: var(--text-main);
    border-color: var(--accent-primary, #A8C545);
}

.sticker-action-btn--ghost.active {
    color: var(--accent-primary);
    border-color: var(--accent-primary);
    background: var(--accent-highlight, rgba(168, 197, 69, 0.06));
}

/* Feedback states */
.sticker-action-btn--feedback-success {
    background: var(--accent-success, #22C55E) !important;
    color: #fff !important;
}

.sticker-action-btn--feedback-error {
    background: var(--accent-danger, #EF4444) !important;
    color: #fff !important;
}

.sticker-action-btn--loading {
    opacity: 0.6;
    pointer-events: none;
}

/* Spacer */
.sticker-actions-spacer {
    flex: 1;
}

/* ────────────────────────────────
   5. GRID CONTAINER
   ──────────────────────────────── */
.sticker-browser-grid {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: var(--space-md, 16px);
    min-height: 140px;
    /* iOS momentum scroll */
    -webkit-overflow-scrolling: touch;
    overscroll-behavior: contain;
}

/* Custom scrollbar matching theme */
.sticker-browser-grid::-webkit-scrollbar {
    width: 6px;
}

.sticker-browser-grid::-webkit-scrollbar-track {
    background: transparent;
}

.sticker-browser-grid::-webkit-scrollbar-thumb {
    background: var(--border-color, rgba(0, 0, 0, 0.15));
    border-radius: var(--radius-full, 9999px);
}

.sticker-browser-grid::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted, rgba(0, 0, 0, 0.25));
}

.sticker-grid-layout {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(76px, 1fr));
    gap: var(--space-sm, 8px);
}

/* ────────────────────────────────
   6. STICKER CELL — Individual item
   ──────────────────────────────── */
.sticker-cell {
    position: relative;
    aspect-ratio: 1;
    border-radius: var(--radius-md, 10px);
    overflow: hidden;
    background: var(--bg-surface-alt, #f5f5f5);
    border: 2px solid transparent;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    /* Spring physics transition */
    transition:
        transform var(--duration-fast, 150ms) var(--ease-spring, cubic-bezier(0.34, 1.56, 0.64, 1)),
        border-color var(--duration-fast, 150ms) ease,
        box-shadow var(--duration-fast, 150ms) ease;
}

.sticker-cell img {
    max-width: 88%;
    max-height: 88%;
    object-fit: contain;
    pointer-events: none;
    transition: transform var(--duration-normal, 250ms) var(--ease-spring);
}

/* Hover — Lift + Border glow */
.sticker-cell:hover {
    border-color: var(--accent-glow-soft, rgba(168, 197, 69, 0.25));
    transform: scale(1.06);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.sticker-cell:hover img {
    transform: scale(1.06);
}

/* Active — Spring compression */
.sticker-cell:active {
    transform: scale(0.95);
    transition-duration: 80ms;
}

/* Selected state (selection mode) */
.sticker-cell.selected {
    border-color: var(--accent-success, #22C55E);
    background: var(--input-success-bg, rgba(34, 197, 94, 0.08));
    box-shadow:
        0 0 0 1px var(--accent-success, #22C55E),
        0 2px 8px rgba(34, 197, 94, 0.15);
}

/* Error state (broken image) */
.sticker-cell.broken {
    opacity: 0.3;
    pointer-events: none;
}

/* ────────────────────────────────
   7. QUICK ADD BUTTON (⭐)
   ──────────────────────────────── */
.sticker-quick-add {
    position: absolute;
    top: 4px;
    right: 4px;
    width: 28px;
    height: 28px;
    border-radius: var(--radius-full, 9999px);
    border: none;
    background: rgba(0, 0, 0, 0.55);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    color: #FFD700;
    font-size: 0.7em;
    cursor: pointer;
    display: none;
    /* shown on hover */
    align-items: center;
    justify-content: center;
    z-index: 3;
    transition: all var(--duration-fast, 150ms) ease;
    /* Ensure tappable on mobile */
    min-width: 28px;
    min-height: 28px;
}

.sticker-cell:hover .sticker-quick-add:not(.hidden) {
    display: flex;
}

.sticker-quick-add:hover {
    background: rgba(0, 0, 0, 0.75);
    transform: scale(1.15);
}

.sticker-quick-add:active {
    transform: scale(0.9);
}

/* Feedback variants */
.sticker-quick-add.added {
    color: var(--accent-success, #22C55E);
    background: rgba(34, 197, 94, 0.25);
}

.sticker-quick-add.error {
    color: var(--accent-danger, #EF4444);
    background: rgba(239, 68, 68, 0.25);
}

/* ────────────────────────────────
   8. CHECKBOX OVERLAY (selection mode)
   ──────────────────────────────── */
.sticker-checkbox {
    position: absolute;
    top: 4px;
    left: 4px;
    width: 22px;
    height: 22px;
    border-radius: var(--radius-full, 9999px);
    border: 2px solid rgba(255, 255, 255, 0.5);
    background: rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    display: none;
    /* shown in select mode */
    align-items: center;
    justify-content: center;
    z-index: 3;
    font-size: 0.6em;
    color: white;
    transition: all var(--duration-fast, 150ms) ease;
}

.sticker-checkbox.checked {
    background: var(--accent-success, #22C55E);
    border-color: var(--accent-success, #22C55E);
    animation: checkPop 0.3s var(--ease-spring) forwards;
}

@keyframes checkPop {
    0% {
        transform: scale(0.7);
    }

    60% {
        transform: scale(1.15);
    }

    100% {
        transform: scale(1);
    }
}

/* Show when in select mode */
.sticker-browser-panel.select-mode .sticker-checkbox {
    display: flex;
}

/* Hide quick add in select mode */
.sticker-browser-panel.select-mode .sticker-quick-add {
    display: none !important;
}

/* ────────────────────────────────
   9. EMPTY / ERROR / LOADING STATES
   ──────────────────────────────── */
.sticker-browser-state {
    text-align: center;
    padding: 48px 24px;
    color: var(--text-muted, #888);
}

.sticker-browser-state .state-icon {
    font-size: 2.4em;
    margin-bottom: 12px;
    opacity: 0.5;
    display: block;
}

.sticker-browser-state .state-text {
    font-size: var(--text-sm, 0.8125rem);
    font-weight: var(--font-medium, 500);
    line-height: 1.5;
}

.sticker-browser-state.error {
    color: var(--accent-danger, #EF4444);
}

.sticker-browser-state.error .state-icon {
    opacity: 0.7;
}

/* Loading spinner */
.sticker-browser-state .spinner {
    display: inline-block;
    width: 28px;
    height: 28px;
    border: 3px solid var(--border-color, rgba(0, 0, 0, 0.1));
    border-top-color: var(--accent-primary, #A8C545);
    border-radius: 50%;
    animation: stickerSpin 0.7s linear infinite;
    margin-bottom: 12px;
}

@keyframes stickerSpin {
    to {
        transform: rotate(360deg);
    }
}

/* ────────────────────────────────
   10. PRIVACY TOGGLE (own card)
   ──────────────────────────────── */
.sticker-visibility-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 12px;
    font-size: var(--text-xs, 0.75rem);
    font-weight: var(--font-semibold, 600);
    border-radius: var(--radius-full, 9999px);
    cursor: pointer;
    border: 1px solid var(--border-color);
    background: transparent;
    transition: all var(--duration-fast, 150ms) ease;
    min-height: 30px;
}

.sticker-visibility-btn[data-public="true"] {
    color: var(--accent-success, #22C55E);
    border-color: var(--accent-success, #22C55E);
}

.sticker-visibility-btn[data-public="false"] {
    color: var(--text-muted);
    border-color: var(--border-color);
}

.sticker-visibility-btn:hover {
    background: var(--surface-hover, rgba(0, 0, 0, 0.04));
    transform: scale(1.03);
}

.sticker-visibility-btn:active {
    transform: scale(0.96);
}

/* ────────────────────────────────
   11. MOBILE — Sheet-from-bottom
   ──────────────────────────────── */
@media (max-width: 600px) {
    .sticker-browser-backdrop {
        align-items: flex-end;
    }

    .sticker-browser-panel {
        width: 100%;
        max-width: 100%;
        max-height: 85vh;
        border-radius: var(--radius-xl, 24px) var(--radius-xl, 24px) 0 0;
        animation: stickerSheetUp 0.4s var(--ease-out-expo, cubic-bezier(0.16, 1, 0.3, 1)) forwards;
        /* Safe area for bottom navigation */
        padding-bottom: var(--safe-area-bottom, 0px);
    }

    @keyframes stickerSheetUp {
        from {
            opacity: 0;
            transform: translateY(100%);
        }

        to {
            opacity: 1;
            transform: translateY(0);
        }
    }

    /* Pull indicator bar (iOS sheet style) */
    .sticker-browser-header::before {
        content: '';
        position: absolute;
        top: 8px;
        left: 50%;
        transform: translateX(-50%);
        width: 36px;
        height: 5px;
        border-radius: var(--radius-full);
        background: var(--border-color, rgba(0, 0, 0, 0.15));
    }

    .sticker-browser-header {
        position: relative;
        padding-top: 22px;
    }

    /* Larger grid cells on mobile for touch */
    .sticker-grid-layout {
        grid-template-columns: repeat(auto-fill, minmax(72px, 1fr));
        gap: 6px;
    }

    /* Always-visible star button on touch */
    .sticker-quick-add {
        display: flex !important;
        width: 32px;
        height: 32px;
        font-size: 0.75em;
        opacity: 0.9;
    }

    /* Larger checkboxes for touch */
    .sticker-checkbox {
        width: 26px;
        height: 26px;
        font-size: 0.7em;
    }

    /* Sticker action buttons more tappable */
    .sticker-action-btn {
        min-height: 38px;
        padding: 8px 16px;
    }
}

/* ────────────────────────────────
   12. REDUCED MOTION
   ──────────────────────────────── */
@media (prefers-reduced-motion: reduce) {

    .sticker-browser-backdrop,
    .sticker-browser-panel,
    .sticker-cell,
    .sticker-cell img,
    .sticker-quick-add,
    .sticker-checkbox,
    .sticker-action-btn {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
}

/* ────────────────────────────────
   13. THEME-SPECIFIC REFINEMENTS
   ──────────────────────────────── */

/* Dark theme — Sticker cells get subtle inner glow */
[data-theme="dark"] .sticker-cell {
    background: var(--bg-surface-alt, #1e2822);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.03);
}

[data-theme="dark"] .sticker-cell:hover {
    border-color: var(--glow-border, rgba(168, 197, 69, 0.22));
    box-shadow:
        inset 0 1px 0 rgba(255, 255, 255, 0.03),
        0 4px 14px rgba(5, 12, 8, 0.35);
}

[data-theme="dark"] .sticker-browser-actions {
    background: rgba(30, 40, 34, 0.6);
    border-bottom-color: var(--border-color);
}

[data-theme="dark"] .sticker-browser-close {
    background: rgba(255, 255, 255, 0.08);
}

[data-theme="dark"] .sticker-browser-close:hover {
    background: rgba(255, 255, 255, 0.14);
}

/* Deep Ether — Azure accent + glass effects */
[data-theme="deep-ether"] .sticker-browser-panel {
    background: rgba(18, 20, 31, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-color: var(--glow-border, rgba(121, 172, 255, 0.14));
    box-shadow:
        var(--shadow-floating),
        0 0 0 1px rgba(121, 172, 255, 0.06);
}

[data-theme="deep-ether"] .sticker-cell {
    background: rgba(26, 29, 43, 0.8);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
}

[data-theme="deep-ether"] .sticker-cell:hover {
    border-color: rgba(13, 102, 255, 0.35);
    box-shadow:
        inset 0 1px 0 rgba(255, 255, 255, 0.04),
        0 4px 14px rgba(6, 8, 20, 0.35),
        0 0 12px rgba(13, 102, 255, 0.08);
}

[data-theme="deep-ether"] .sticker-cell.selected {
    box-shadow:
        0 0 0 1px var(--accent-success),
        0 2px 8px rgba(52, 211, 153, 0.2),
        0 0 16px rgba(52, 211, 153, 0.08);
}

[data-theme="deep-ether"] .sticker-browser-header-icon {
    background: rgba(13, 102, 255, 0.12);
    color: var(--accent-text, #79ACFF);
}

[data-theme="deep-ether"] .sticker-browser-actions {
    background: rgba(26, 29, 43, 0.6);
}

[data-theme="deep-ether"] .sticker-browser-close {
    background: rgba(255, 255, 255, 0.06);
}

[data-theme="deep-ether"] .sticker-browser-close:hover {
    background: rgba(255, 255, 255, 0.12);
}

/* Light Ether — Ceramic elevation + Poire accent */
[data-theme="light-ether"] .sticker-browser-panel {
    box-shadow: var(--shadow-floating);
}

[data-theme="light-ether"] .sticker-cell {
    background: var(--bg-surface-alt, #F3F2EE);
    box-shadow: var(--shadow-card);
    border: 1px solid transparent;
}

[data-theme="light-ether"] .sticker-cell:hover {
    box-shadow: var(--shadow-elevated);
    border-color: rgba(168, 197, 69, 0.2);
    transform: scale(1.06) translateY(-2px);
}

[data-theme="light-ether"] .sticker-quick-add {
    background: rgba(255, 255, 255, 0.85);
    color: var(--accent-text, #3F5E14);
    border: 1px solid var(--border-color);
}

[data-theme="light-ether"] .sticker-quick-add:hover {
    background: #fff;
    box-shadow: var(--shadow-card);
}

[data-theme="light-ether"] .sticker-browser-actions {
    background: var(--bg-surface-alt, #F3F2EE);
}

[data-theme="light-ether"] .sticker-browser-close {
    background: var(--surface-hover, rgba(29, 29, 31, 0.06));
}

/* Default theme (Pear OS) — minimal refinements */
:root .sticker-browser-panel,
[data-theme=""] .sticker-browser-panel {
    box-shadow: var(--shadow-floating);
}

/* ────────────────────────────────
   14. STICKER COUNT BADGE
   ──────────────────────────────── */
.sticker-count-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 20px;
    height: 20px;
    padding: 0 6px;
    border-radius: var(--radius-full);
    background: var(--accent-primary);
    color: var(--accent-text, #1d1d1f);
    font-size: 0.65em;
    font-weight: var(--font-bold, 700);
    font-variant-numeric: tabular-nums;
    margin-left: 2px;
}

/* ────────────────────────────────
   15. USERCARD STICKER BUTTON
   ──────────────────────────────── */
.sticker-browse-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 12px;
    font-size: var(--text-xs, 0.75rem);
    font-weight: var(--font-semibold, 600);
    border-radius: var(--radius-sm, 6px);
    cursor: pointer;
    border: 1px solid var(--border-color);
    background: transparent;
    color: var(--text-main);
    transition: all var(--duration-fast, 150ms) ease;
    min-height: 30px;
}

.sticker-browse-btn:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
    background: var(--accent-highlight, rgba(168, 197, 69, 0.06));
    transform: scale(1.03);
}

.sticker-browse-btn:active {
    transform: scale(0.96);
}

[data-theme="deep-ether"] .sticker-browse-btn:hover {
    border-color: var(--accent-text, #79ACFF);
    color: var(--accent-text, #79ACFF);
    background: rgba(13, 102, 255, 0.08);
}