/* ============================================================
   SHAOWENHAO — Personal Photo Blog
   Light · Clean · Minimal
   Responsive: PC / Tablet / Mobile
   ============================================================ */

/* --- CSS Variables --- */
:root {
    --color-bg:        #fafaf9;
    --color-surface:   #ffffff;
    --color-card:      #ffffff;
    --color-text:      #1d1d20;
    --color-text-soft: #6e6e75;
    --color-text-muted:#9c9ca3;
    --color-accent:    #2c2c32;
    --color-accent-dim:#6e6e75;
    --color-border:    #e6e6ea;
    --color-border-sub:#efeff2;
    --color-danger:    #d94040;
    --color-danger-bg: #fef2f2;
    --logo-opacity:    0.035;
    --radius-card:     10px;
    --radius-btn:      7px;
    --max-width:       1280px;
    --gap-grid:        24px;
    --font-stack:      -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
                       "Helvetica Neue", Arial, "Noto Sans SC", "PingFang SC",
                       "Microsoft YaHei", sans-serif;
    --transition-fast: 0.18s ease;
    --transition-slow: 0.3s ease;
}

/* --- Reset & Base --- */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-stack);
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.7;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    position: relative;
}

a {
    color: var(--color-text-soft);
    text-decoration: none;
    transition: color var(--transition-fast);
}
a:hover { color: var(--color-accent); }

img { max-width: 100%; display: block; }

::selection {
    background: rgba(0, 0, 0, 0.08);
    color: var(--color-text);
}

/* ============================================================
   Logo Watermark — centered, subtle, non-interfering
   ============================================================ */
.logo-watermark {
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    display: flex;
    align-items: center;
    justify-content: center;
}

.logo-watermark img {
    width: min(360px, 46vw);
    height: auto;
    opacity: 0.045;
    user-select: none;
    -webkit-user-drag: none;
}

/* ============================================================
   Header — minimal, clean
   ============================================================ */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(250, 250, 249, 0.82);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border-bottom: 1px solid var(--color-border-sub);
}

.header-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 15px 28px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.site-brand {
    display: flex;
    align-items: center;
    gap: 12px;
}

/* Logo wrapper — positioning context for the hover bubble */
.logo-wrap {
    position: relative;
    display: flex;
    align-items: center;
}

.site-brand .logo {
    width: 34px;
    height: 34px;
    border-radius: 7px;
    object-fit: contain;
    cursor: pointer;
    position: relative;
    z-index: 1;
}

/* Hover bubble — enlarged logo preview, appears below */
.logo-bubble {
    position: absolute;
    top: calc(100% + 14px);
    left: 0;
    transform: translateY(6px);
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.22s ease, transform 0.22s ease;
    z-index: 1000;
}

.logo-bubble::before {
    content: '';
    position: absolute;
    inset: -10px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 14px;
    box-shadow: 0 10px 36px rgba(0, 0, 0, 0.10);
    z-index: -1;
}

/* Arrow at top-left corner, pointing up toward the logo */
.logo-bubble::after {
    content: '';
    position: absolute;
    top: -6px;
    left: 14px;
    width: 0;
    height: 0;
    border-left: 8px solid transparent;
    border-right: 8px solid transparent;
    border-bottom: 8px solid var(--color-surface);
    filter: drop-shadow(0 -1px 1px rgba(0, 0, 0, 0.05));
    z-index: 1;
}

.logo-bubble img {
    display: block;
    width: 280px;
    max-width: 72vw;
    height: auto;
    border-radius: 10px;
}

/* Show bubble on hover */
.logo-wrap:hover .logo-bubble {
    opacity: 1;
    transform: translateY(0);
}

.site-brand .site-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-accent);
    letter-spacing: 0.07em;
}

.site-nav {
    display: flex;
    gap: 4px;
}

.site-nav a {
    padding: 6px 16px;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-text-soft);
    border-radius: 6px;
    transition: all var(--transition-fast);
}
.site-nav a:hover {
    color: var(--color-accent);
    background: rgba(0, 0, 0, 0.04);
}

/* Upload trigger button (header) */
.btn-upload-trigger {
    padding: 6px 16px;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-text-soft);
    border-radius: 6px;
    border: none;
    background: none;
    cursor: pointer;
    font-family: var(--font-stack);
    transition: all var(--transition-fast);
}
.btn-upload-trigger:hover {
    color: var(--color-accent);
    background: rgba(0, 0, 0, 0.04);
}

/* ============================================================
   Header Search
   ============================================================ */
.header-search {
    display: flex;
    align-items: center;
    gap: 0;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    padding: 0 4px 0 12px;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
    max-width: 280px;
    flex: 1;
    margin: 0 18px;
}
.header-search:focus-within {
    border-color: var(--color-accent-dim);
    box-shadow: 0 0 0 3px rgba(0, 0, 0, 0.03);
}

.search-icon {
    font-size: 0.8rem;
    opacity: 0.4;
    flex-shrink: 0;
    line-height: 1;
}

.search-input {
    flex: 1;
    min-width: 0;
    border: none;
    background: none;
    padding: 8px 8px;
    font-size: 0.82rem;
    color: var(--color-text);
    font-family: var(--font-stack);
    outline: none;
}
.search-input::placeholder {
    color: var(--color-text-muted);
    opacity: 0.7;
}

.search-clear {
    display: none;
    flex-shrink: 0;
    width: 26px;
    height: 26px;
    border: none;
    background: none;
    color: var(--color-text-muted);
    font-size: 1.1rem;
    cursor: pointer;
    border-radius: 50%;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}
.search-clear.visible {
    display: flex;
}
.search-clear:hover {
    background: rgba(0, 0, 0, 0.06);
    color: var(--color-text);
}

/* No search results */
.search-empty {
    text-align: center;
    padding: 60px 20px;
    display: none;
}
.search-empty.visible {
    display: block;
}
.search-empty-icon {
    font-size: 2.5rem;
    margin-bottom: 14px;
    opacity: 0.2;
}
.search-empty p {
    font-size: 0.9rem;
    color: var(--color-text-soft);
    margin-bottom: 4px;
}
.search-empty-hint {
    font-size: 0.8rem !important;
    color: var(--color-text-muted) !important;
}

/* ============================================================
   Main Layout
   ============================================================ */
.site-main {
    flex: 1;
    max-width: var(--max-width);
    width: 100%;
    margin: 0 auto;
    padding: 36px 28px 72px;
    position: relative;
    z-index: 1;
}

/* ============================================================
   Upload Modal
   ============================================================ */
.upload-modal-overlay {
    position: fixed;
    inset: 0;
    z-index: 10000;
    background: rgba(0, 0, 0, 0.35);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.22s ease;
}
.upload-modal-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.upload-modal {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-card);
    padding: 30px 28px 24px;
    width: 440px;
    max-width: 92vw;
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.1);
}

.upload-modal-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 20px;
    text-align: center;
}

.upload-form {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.upload-modal-actions {
    display: flex;
    gap: 10px;
    justify-content: center;
    margin-top: 4px;
}

.upload-modal-actions .btn {
    flex: 1;
}

.upload-form input[type="file"] {
    flex: 1;
    min-width: 200px;
    padding: 9px 14px;
    border: 1px dashed var(--color-border);
    border-radius: var(--radius-btn);
    font-size: 0.85rem;
    cursor: pointer;
    background: var(--color-bg);
    color: var(--color-text-soft);
    transition: border-color var(--transition-fast);
    font-family: var(--font-stack);
}
.upload-form input[type="file"]:hover {
    border-color: var(--color-text-muted);
}
.upload-form input[type="file"]::file-selector-button {
    background: var(--color-border-sub);
    border: none;
    color: var(--color-text);
    padding: 4px 12px;
    border-radius: 4px;
    margin-right: 10px;
    cursor: pointer;
    font-family: var(--font-stack);
    font-size: 0.8rem;
    transition: background var(--transition-fast);
}
.upload-form input[type="file"]::file-selector-button:hover {
    background: var(--color-border);
}

/* Key input */
.key-input {
    width: 170px;
    padding: 9px 13px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-btn);
    font-size: 0.85rem;
    background: var(--color-bg);
    color: var(--color-text);
    font-family: var(--font-stack);
    transition: border-color var(--transition-fast);
}
.key-input:focus {
    outline: none;
    border-color: var(--color-accent-dim);
    box-shadow: 0 0 0 3px rgba(0, 0, 0, 0.04);
}
.key-input::placeholder {
    color: var(--color-text-muted);
}

.key-input--modal {
    width: 100%;
    padding: 11px 16px;
    font-size: 0.92rem;
    text-align: center;
}

.cap-warning {
    margin-top: 10px;
    font-size: 0.8rem;
    color: #b08830;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 9px 26px;
    border: none;
    border-radius: var(--radius-btn);
    font-size: 0.88rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    font-family: var(--font-stack);
    white-space: nowrap;
}

.btn-primary {
    background: var(--color-accent);
    color: #fff;
}
.btn-primary:hover {
    background: #3d3d44;
}
.btn-primary:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.btn-secondary {
    background: transparent;
    color: var(--color-text-soft);
    border: 1px solid var(--color-border);
}
.btn-secondary:hover {
    background: var(--color-bg);
    color: var(--color-accent);
}

.btn-danger {
    background: var(--color-danger);
    color: #fff;
}
.btn-danger:hover {
    background: #e85555;
}
.btn-danger:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.upload-status {
    margin-top: 14px;
    font-size: 0.82rem;
    min-height: 20px;
}
.upload-status.success { color: #3b9b5c; }
.upload-status.error   { color: var(--color-danger); }

/* ============================================================
   Gallery Toolbar
   ============================================================ */
.gallery-toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
    flex-wrap: wrap;
    gap: 12px;
}

.photo-count {
    font-size: 0.82rem;
    color: var(--color-text-muted);
    font-weight: 500;
    letter-spacing: 0.04em;
}

/* ============================================================
   Photo Grid
   ============================================================ */
.photo-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--gap-grid);
}

/* ============================================================
   Photo Card
   ============================================================ */
.photo-card {
    background: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-card);
    overflow: hidden;
    transition: transform var(--transition-slow), box-shadow var(--transition-slow), opacity 0.45s ease;
    cursor: pointer;
    display: flex;
    flex-direction: column;
}

/* Loading state — hidden, staggered reveal via JS */
.photo-card--loading {
    opacity: 0;
    transform: translateY(18px);
    pointer-events: none;
}

.photo-card--loaded {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

.photo-card--loaded:hover {
    transform: translateY(-3px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
}

/* Paginated cards — hidden until revealed */
.photo-card--hidden {
    display: none;
}
.photo-card--revealed {
    display: flex;
}

/* Load-more trigger */
.load-more-wrap {
    text-align: center;
    padding: 28px 0 10px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}

.load-more-btn {
    min-width: 200px;
}

.load-more-count {
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

.card-image-wrap {
    position: relative;
    width: 100%;
    padding-top: 75%;
    overflow: hidden;
    background: #f0f0f2;
}

/* Shimmer skeleton — animated placeholder */
.card-shimmer {
    position: absolute;
    inset: 0;
    z-index: 0;
    background: linear-gradient(
        90deg,
        #ececf0 0%,
        #f4f4f6 40%,
        #ececf0 80%
    );
    background-size: 200% 100%;
    animation: shimmer 1.8s ease-in-out infinite;
    transition: opacity 0.35s ease;
}

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

/* Hide shimmer once image loads */
.card-img.loaded + .card-shimmer,
.card-img[src]:not([src=""]) + .card-shimmer {
    opacity: 0;
    pointer-events: none;
}

.card-image-wrap img {
    position: absolute;
    inset: 0;
    z-index: 1;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0;
    transition: opacity 0.4s ease, transform 0.45s ease;
}

/* Image loaded state */
.card-img.loaded {
    opacity: 1;
}

.photo-card--loaded:hover .card-image-wrap img {
    transform: scale(1.03);
}

/* On hover, also scale the shimmer (to match img scale) */
.photo-card--loaded:hover .card-shimmer {
    transform: scale(1.03);
}

/* Card action buttons (refresh + delete) — top-right of card image */
.card-action-btn {
    position: absolute;
    top: 8px;
    z-index: 10;
    width: 26px;
    height: 26px;
    border-radius: 50%;
    border: none;
    background: rgba(255, 255, 255, 0.82);
    color: rgba(0, 0, 0, 0.5);
    font-size: 1rem;
    line-height: 1;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-fast), background var(--transition-fast), color var(--transition-fast);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
}
.card-refresh-btn { right: 40px; }
.card-delete-btn  { right: 8px; }

.photo-card:hover .card-action-btn {
    opacity: 1;
}
.card-refresh-btn:hover {
    background: rgba(0, 0, 0, 0.75);
    color: #fff;
}
.card-delete-btn:hover {
    background: var(--color-danger);
    color: #fff;
}

.card-body {
    padding: 13px 18px 16px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    flex: 1;
}

/* Skeleton text line */
.skeleton-line {
    height: 0.75rem;
    border-radius: 4px;
    background: #e8e8ed;
    animation: shimmer 1.8s ease-in-out infinite;
    background-size: 200% 100%;
}
.skeleton-line--wide { width: 75%; }
.skeleton-line--half { width: 50%; }

.exif-info {
    display: flex;
    flex-direction: column;
    gap: 6px;
    font-size: 0.8rem;
    color: var(--color-text-soft);
    line-height: 1.5;
}

.exif-row {
    display: flex;
    align-items: baseline;
    gap: 7px;
}

.exif-icon {
    width: 16px;
    text-align: center;
    flex-shrink: 0;
    opacity: 0.5;
    font-size: 0.72rem;
}

/* ============================================================
   Empty State
   ============================================================ */
.empty-state {
    text-align: center;
    padding: 100px 20px;
    grid-column: 1 / -1;
}

.empty-state .empty-icon {
    font-size: 3.5rem;
    margin-bottom: 18px;
    opacity: 0.2;
}

.empty-state h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--color-text);
}

.empty-state p {
    font-size: 0.88rem;
    color: var(--color-text-muted);
}

/* ============================================================
   Footer
   ============================================================ */
.site-footer {
    background: var(--color-surface);
    border-top: 1px solid var(--color-border-sub);
    text-align: center;
    padding: 22px 20px;
    font-size: 0.76rem;
    color: var(--color-text-muted);
    letter-spacing: 0.02em;
    line-height: 1.8;
    position: relative;
    z-index: 1;
}

/* ============================================================
   Key-prompt Modal
   ============================================================ */
.key-modal-overlay {
    position: fixed;
    inset: 0;
    z-index: 10000;
    background: rgba(0, 0, 0, 0.35);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.22s ease;
}
.key-modal-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.key-modal {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-card);
    padding: 30px 28px 24px;
    width: 380px;
    max-width: 92vw;
    text-align: center;
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.1);
}

.key-modal-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 6px;
}

.key-modal-desc {
    font-size: 0.82rem;
    color: var(--color-text-soft);
    margin-bottom: 4px;
}

.key-modal-target {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    margin-bottom: 16px;
    word-break: break-all;
    font-family: monospace;
}

.key-modal-error {
    font-size: 0.8rem;
    color: var(--color-danger);
    min-height: 20px;
    margin-top: 8px;
    margin-bottom: 2px;
}

.key-modal-actions {
    display: flex;
    gap: 10px;
    justify-content: center;
    margin-top: 16px;
}

.key-modal-actions .btn {
    flex: 1;
}

/* ============================================================
   Lightbox
   ============================================================ */
.lightbox-overlay {
    position: fixed;
    inset: 0;
    z-index: 9999;
    background: rgba(255, 255, 255, 0.97);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}
.lightbox-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.lightbox-content {
    position: relative;
    max-width: 92vw;
    max-height: 92vh;
    display: flex;
    flex-direction: column;
    align-items: center;
}

/* Image area — contains loader + img, stable size */
.lightbox-image-area {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 200px;
    min-height: 150px;
}

.lightbox-image-area img {
    max-width: 90vw;
    max-height: 74vh;
    object-fit: contain;
    border-radius: 4px;
    box-shadow: 0 8px 40px rgba(0, 0, 0, 0.08);
    opacity: 0;
    transition: opacity 0.35s ease;
}

.lightbox-image-area img.loaded {
    opacity: 1;
}

.lightbox-info {
    margin-top: 16px;
    color: var(--color-text-soft);
    text-align: center;
    font-size: 0.82rem;
    display: flex;
    gap: 22px;
    flex-wrap: wrap;
    justify-content: center;
    min-height: 22px;
    flex-shrink: 0;
}

.lightbox-close {
    position: absolute;
    top: -48px;
    right: -6px;
    background: none;
    border: none;
    color: var(--color-text-muted);
    font-size: 2rem;
    cursor: pointer;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color var(--transition-fast);
}
.lightbox-close:hover { color: var(--color-text); }

/* Navigation row — sits between image and info, never overlaps the photo */
.lightbox-nav-row {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 32px;
    padding: 16px 0 6px;
    flex-shrink: 0;
}

.lightbox-nav {
    background: none;
    border: none;
    color: var(--color-text-muted);
    font-size: 2.2rem;
    font-weight: 300;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    line-height: 1;
    user-select: none;
}
.lightbox-nav:hover {
    background: rgba(0, 0, 0, 0.05);
    color: var(--color-text);
}
.lightbox-nav:active {
    background: rgba(0, 0, 0, 0.08);
    transform: scale(0.94);
}
.lightbox-prev { /* handled by flex */ }
.lightbox-next { /* handled by flex */ }

/* Lightbox loader — progress bar, above image */
.lightbox-loader {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    display: flex;
    align-items: center;
    justify-content: center;
    pointer-events: none;
    z-index: 5;
}

.lb-pulse-bar {
    width: 180px;
    height: 3px;
    border-radius: 2px;
    background: var(--color-border);
    overflow: hidden;
    position: relative;
}

.lb-pulse-bar::after {
    content: '';
    position: absolute;
    top: 0;
    left: -40%;
    width: 40%;
    height: 100%;
    background: var(--color-accent);
    border-radius: 2px;
    animation: lbPulse 1.2s ease-in-out infinite;
}

@keyframes lbPulse {
    0%   { left: -40%; }
    100% { left: 100%; }
}

.lightbox-image-area img {
    position: relative;
    z-index: 1;
}


/* ============================================================
   Mobile: Hamburger button & Drawer
   ============================================================ */
.hamburger-btn {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 36px;
    height: 36px;
    padding: 6px;
    border: none;
    background: none;
    cursor: pointer;
    border-radius: 6px;
    transition: background var(--transition-fast);
}
.hamburger-btn:hover {
    background: rgba(0, 0, 0, 0.04);
}
.hamburger-btn span {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--color-text-soft);
    border-radius: 2px;
    transition: transform 0.25s ease, opacity 0.25s ease;
}
/* Hamburger active → X */
.hamburger-btn.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}
.hamburger-btn.active span:nth-child(2) {
    opacity: 0;
}
.hamburger-btn.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* Drawer overlay */
.drawer-overlay {
    position: fixed;
    inset: 0;
    z-index: 9998;
    background: rgba(0, 0, 0, 0.25);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}
.drawer-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

/* Drawer panel */
.drawer {
    position: fixed;
    top: 0;
    right: 0;
    z-index: 9999;
    width: 260px;
    max-width: 80vw;
    height: 100vh;
    height: 100dvh;
    background: var(--color-surface);
    box-shadow: -4px 0 24px rgba(0, 0, 0, 0.08);
    transform: translateX(100%);
    transition: transform 0.3s ease;
    display: flex;
    flex-direction: column;
}
.drawer.active {
    transform: translateX(0);
}

.drawer-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 20px;
    border-bottom: 1px solid var(--color-border-sub);
}
.drawer-title {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--color-text);
}
.drawer-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--color-text-muted);
    cursor: pointer;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 6px;
    transition: all var(--transition-fast);
}
.drawer-close:hover {
    background: rgba(0, 0, 0, 0.04);
    color: var(--color-text);
}

.drawer-body {
    display: flex;
    flex-direction: column;
    padding: 12px 0;
}

.drawer-link {
    display: block;
    padding: 14px 24px;
    font-size: 0.92rem;
    font-weight: 500;
    color: var(--color-text-soft);
    border: none;
    background: none;
    text-align: left;
    cursor: pointer;
    font-family: var(--font-stack);
    transition: all var(--transition-fast);
    text-decoration: none;
}
.drawer-link:hover {
    background: var(--color-bg);
    color: var(--color-accent);
}
.drawer-upload-btn {
    width: 100%;
}

/* ============================================================
   Responsive: Tablet
   ============================================================ */
@media (max-width: 1024px) {
    .photo-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }

    :root { --gap-grid: 20px; }

    .header-inner { padding: 13px 22px; }
    .site-main   { padding: 28px 22px 52px; }
    .lightbox-nav-row { gap: 20px; padding-top: 12px; }
}

/* ============================================================
   Responsive: Mobile
   ============================================================ */
@media (max-width: 640px) {
    .photo-grid {
        grid-template-columns: 1fr;
        gap: 16px;
        padding: 0 4px;
    }

    :root { --gap-grid: 16px; }

    .header-inner {
        padding: 10px 12px;
        flex-wrap: wrap;
        gap: 8px;
    }
    .site-main   { padding: 22px 12px 44px; }

    .site-brand .logo { width: 28px; height: 28px; }
    .site-brand .site-title { font-size: 1rem; }

    /* Search: full-width on mobile, below brand */
    .header-search {
        order: 3;
        flex: 1 1 100%;
        max-width: 100%;
        margin: 0;
    }

    /* Hide desktop nav, show hamburger */
    .site-nav { display: none; }
    .hamburger-btn { display: flex; }

    .card-body { padding: 13px 15px 15px; }

    .lightbox-nav-row { gap: 24px; padding-top: 12px; }
    .lightbox-nav {
        width: 44px;
        height: 44px;
        font-size: 2rem;
    }
    .lightbox-info { gap: 12px; font-size: 0.76rem; }
    .lightbox-close { top: -42px; right: 0; }

    .logo-watermark img { width: min(280px, 60vw); }
}

/* ============================================================
   Toast notification
   ============================================================ */
.toast {
    position: fixed;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    z-index: 99999;
    padding: 11px 26px;
    border-radius: 8px;
    font-size: 0.88rem;
    font-weight: 500;
    font-family: var(--font-stack);
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.28s ease, transform 0.28s ease;
    white-space: nowrap;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
}
.toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}
.toast--success {
    background: #f0faf4;
    color: #2d6a4f;
    border: 1px solid #b7e4c7;
}
.toast--error {
    background: #fef2f2;
    color: #991b1b;
    border: 1px solid #fecaca;
}

/* ============================================================
   Grid Loader — skeleton cards inside photo grid
   ============================================================ */
.grid-loader {
    display: contents;
}
.grid-loader.hidden {
    display: none;
}

/* Skeleton card mimics .photo-card dimensions */
.skeleton-card {
    background: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-card);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    opacity: 1;
    transition: opacity 0.12s ease;
}
.skeleton-card.skeleton-fade-out {
    opacity: 0;
}

.skeleton-card-img {
    width: 100%;
    padding-top: 75%; /* 4:3 ratio, matches .card-image-wrap */
    background: linear-gradient(
        90deg,
        #ececf0 0%,
        #f4f4f6 40%,
        #ececf0 80%
    );
    background-size: 200% 100%;
    animation: shimmer 1.8s ease-in-out infinite;
}

.skeleton-card-body {
    padding: 16px 18px 18px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.skeleton-line {
    height: 0.75rem;
    border-radius: 4px;
    background: #e8e8ed;
    animation: shimmer 1.8s ease-in-out infinite;
    background-size: 200% 100%;
    width: 60%;
}
.skeleton-line--long {
    width: 85%;
}

/* ============================================================
   Utility
   ============================================================ */
.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;
}

.spinner {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid transparent;
    border-top-color: currentColor;
    border-radius: 50%;
    animation: spin 0.55s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }