/* ==========================================================================
   Secure Photo Vault — Refined Dark Glassmorphism
   Design tokens + refined typography, depth, spacing and motion.
   ========================================================================== */

/* Font is loaded non-render-blocking via <link> in each page <head> so the
   page never stalls on the network; it falls back to the system stack instantly. */

:root {
    /* Surfaces */
    --bg-base: #05070f;
    --bg-base-2: #0a0e1c;
    --bg-surface: rgba(15, 22, 41, 0.55);
    --bg-surface-hover: rgba(22, 32, 60, 0.7);
    --bg-elevated: rgba(19, 27, 50, 0.85);

    /* Borders */
    --border-color: rgba(255, 255, 255, 0.08);
    --border-strong: rgba(255, 255, 255, 0.14);
    --border-glow: rgba(99, 102, 241, 0.18);

    /* Brand */
    --primary: #6366f1;
    --primary-hover: #7c7ff5;
    --primary-press: #4f46e5;
    --primary-glow: rgba(99, 102, 241, 0.35);
    --accent: #ec4899;

    --success: #10b981;
    --danger: #ef4444;
    --danger-hover: #dc2626;
    --warning: #f59e0b;

    /* Text */
    --text-main: #f4f5f8;
    --text-muted: #a1a8bd;
    --text-dimmed: #6b7391;

    /* Typography */
    --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

    /* Radius scale */
    --r-sm: 8px;
    --r-md: 12px;
    --r-lg: 16px;
    --r-xl: 22px;
    --r-pill: 999px;

    /* Spacing scale */
    --s-1: 4px;
    --s-2: 8px;
    --s-3: 12px;
    --s-4: 16px;
    --s-5: 20px;
    --s-6: 24px;
    --s-8: 32px;

    /* Layered shadows (softer, more realistic depth) */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3), 0 2px 6px rgba(0, 0, 0, 0.25);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.35), 0 12px 28px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.45), 0 24px 60px rgba(0, 0, 0, 0.4);
    --shadow-primary: 0 8px 24px var(--primary-glow);

    /* Motion */
    --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-smooth: cubic-bezier(0.4, 0, 0.2, 1);
    --transition: all 0.25s var(--ease-smooth);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

body {
    background-color: var(--bg-base);
    background-image:
        radial-gradient(1200px 600px at 15% -10%, rgba(99, 102, 241, 0.10), transparent 60%),
        radial-gradient(1000px 500px at 110% 110%, rgba(236, 72, 153, 0.08), transparent 55%);
    background-attachment: fixed;
    color: var(--text-main);
    font-family: var(--font-sans);
    min-height: 100vh;
    overflow-x: hidden;
    line-height: 1.55;
    letter-spacing: -0.01em;
    position: relative;
}

/* GPU accelerated ambient glow blobs */
body::before, body::after {
    content: "";
    position: fixed;
    width: 440px;
    height: 440px;
    border-radius: 50%;
    pointer-events: none;
    z-index: -1;
    filter: blur(130px);
    opacity: 0.14;
    will-change: transform;
}

body::before {
    background: var(--primary);
    top: -12%;
    left: -8%;
    animation: floatBlob1 26s infinite alternate ease-in-out;
}

body::after {
    background: var(--accent);
    bottom: -12%;
    right: -8%;
    animation: floatBlob2 32s infinite alternate ease-in-out;
}

@keyframes floatBlob1 {
    0%   { transform: translate(0, 0) scale(1); }
    50%  { transform: translate(120px, 80px) scale(1.15); }
    100% { transform: translate(-50px, 120px) scale(0.9); }
}

@keyframes floatBlob2 {
    0%   { transform: translate(0, 0) scale(1.1); }
    50%  { transform: translate(-100px, -120px) scale(0.85); }
    100% { transform: translate(80px, 60px) scale(1.15); }
}

/* Custom scrollbars */
* {
    scrollbar-width: thin;
    scrollbar-color: rgba(255, 255, 255, 0.14) transparent;
}
*::-webkit-scrollbar { width: 10px; height: 10px; }
*::-webkit-scrollbar-track { background: transparent; }
*::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.12);
    border-radius: var(--r-pill);
    border: 2px solid transparent;
    background-clip: content-box;
}
*::-webkit-scrollbar-thumb:hover { background: rgba(255, 255, 255, 0.22); background-clip: content-box; }

/* Glassmorphism common class — refined with inner highlight */
.glass-panel {
    background: var(--bg-surface);
    backdrop-filter: blur(22px) saturate(140%);
    -webkit-backdrop-filter: blur(22px) saturate(140%);
    border: 1px solid var(--border-color);
    border-radius: var(--r-lg);
    box-shadow: var(--shadow-md), inset 0 1px 0 rgba(255, 255, 255, 0.05);
}

/* Login / Setup */
.auth-wrapper {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: var(--s-5);
}

.auth-card {
    width: 100%;
    max-width: 440px;
    padding: 44px 40px;
    position: relative;
    overflow: hidden;
    animation: authReveal 0.7s var(--ease-out) forwards;
}

@keyframes authReveal {
    0%   { opacity: 0; transform: translateY(24px) scale(0.98); }
    100% { opacity: 1; transform: translateY(0) scale(1); }
}

.auth-card::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, var(--border-glow) 0%, transparent 60%);
    pointer-events: none;
}

.auth-logo {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: var(--s-8);
    text-align: center;
}

.auth-logo svg {
    color: var(--primary);
    margin-bottom: var(--s-3);
    filter: drop-shadow(0 0 12px var(--primary-glow));
}

.auth-logo h1 {
    font-size: 1.85rem;
    font-weight: 700;
    letter-spacing: -0.03em;
    background: linear-gradient(135deg, #ffffff 0%, #b9c4ff 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.auth-logo p {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-top: var(--s-1);
}

/* Form controls */
.form-group { margin-bottom: var(--s-5); }

.form-label {
    display: block;
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--text-muted);
    margin-bottom: var(--s-2);
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.input-wrapper { position: relative; }

.input-wrapper svg {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-dimmed);
    pointer-events: none;
    width: 18px;
    height: 18px;
    transition: color 0.2s ease;
}

.input-wrapper:focus-within svg { color: var(--primary); }

.form-input {
    width: 100%;
    padding: 13px 16px;
    background: rgba(255, 255, 255, 0.035);
    border: 1px solid var(--border-color);
    border-radius: var(--r-md);
    color: #ffffff;
    font-family: var(--font-sans);
    font-size: 0.95rem;
    transition: var(--transition);
}

/* Inputs that sit inside an icon wrapper get extra left padding for the icon */
.input-wrapper .form-input { padding-left: 44px; }

/* Textarea variant */
textarea.form-input { min-height: 80px; resize: vertical; }

/* Dropdown option contrast in dark theme */
.form-input option { background: var(--bg-base-2); color: var(--text-main); }

.form-input::placeholder { color: var(--text-dimmed); }

.form-input:hover { border-color: var(--border-strong); }

.form-input:focus {
    outline: none;
    border-color: var(--primary);
    background: rgba(255, 255, 255, 0.06);
    box-shadow: 0 0 0 4px var(--primary-glow);
}

select.form-input {
    appearance: none;
    -webkit-appearance: none;
    background-image: url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='none' stroke='%23a1a8bd' stroke-width='2' viewBox='0 0 24 24'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 14px center;
    padding-right: 40px;
    cursor: pointer;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--s-2);
    width: 100%;
    padding: 13px 18px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-press) 100%);
    border: none;
    border-radius: var(--r-md);
    color: #ffffff;
    font-family: var(--font-sans);
    font-size: 0.92rem;
    font-weight: 600;
    letter-spacing: -0.01em;
    cursor: pointer;
    transition: transform 0.2s var(--ease-out), box-shadow 0.25s var(--ease-out), background 0.25s ease, filter 0.2s ease;
    text-decoration: none;
    box-shadow: var(--shadow-sm);
    position: relative;
    overflow: hidden;
}

/* Keep icon + label above the ripple layer */
.btn > * { position: relative; z-index: 1; }

/* Click ripple (element injected by app.js) */
.ripple {
    position: absolute;
    z-index: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.4);
    transform: scale(0);
    opacity: 0.6;
    pointer-events: none;
    animation: rippleAnim 0.6s var(--ease-out) forwards;
}
.btn-secondary .ripple { background: rgba(255, 255, 255, 0.22); }
@keyframes rippleAnim {
    to { transform: scale(1); opacity: 0; }
}

.btn:hover {
    filter: brightness(1.08);
    box-shadow: var(--shadow-primary);
    transform: translateY(-2px);
}

.btn:active { transform: translateY(0) scale(0.99); }

.btn:focus-visible {
    outline: none;
    box-shadow: 0 0 0 3px var(--bg-base), 0 0 0 5px var(--primary);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.055);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    box-shadow: none;
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--border-strong);
    box-shadow: var(--shadow-sm);
    filter: none;
}

.btn-danger { background: linear-gradient(135deg, var(--danger) 0%, var(--danger-hover) 100%); }
.btn-danger:hover { box-shadow: 0 8px 24px rgba(239, 68, 68, 0.32); }

/* Header buttons sit inline — auto width */
.header-actions .btn { width: auto; padding: 10px 16px; font-size: 0.88rem; }

/* Alerts */
.alert {
    padding: 12px 16px;
    border-radius: var(--r-md);
    margin-bottom: var(--s-5);
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.alert-danger {
    background: rgba(239, 68, 68, 0.14);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: #fca5a5;
}

.alert-success {
    background: rgba(16, 185, 129, 0.14);
    border: 1px solid rgba(16, 185, 129, 0.3);
    color: #a7f3d0;
}

/* Layout — Dashboard */
.app-container {
    max-width: 1440px;
    margin: 0 auto;
    padding: var(--s-8) var(--s-6);
}

.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--s-4);
    flex-wrap: wrap;
    margin-bottom: var(--s-6);
    padding: var(--s-4) var(--s-5);
    position: sticky;
    top: var(--s-3);
    z-index: 100;
    animation: headerReveal 0.7s var(--ease-out) forwards;
}

@keyframes headerReveal {
    0%   { opacity: 0; transform: translateY(-16px); }
    100% { opacity: 1; transform: translateY(0); }
}

.brand-title { display: flex; align-items: center; gap: var(--s-3); }

.brand-title svg {
    color: var(--primary);
    filter: drop-shadow(0 0 10px var(--primary-glow));
}

.brand-title h2 {
    font-size: 1.35rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: var(--s-3);
    flex-wrap: wrap;
}

/* Controls bar */
.control-bar {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: var(--s-4);
    padding: var(--s-4) var(--s-5);
    margin-bottom: var(--s-6);
    opacity: 0;
    animation: controlReveal 0.7s var(--ease-out) 0.12s forwards;
}

@keyframes controlReveal {
    0%   { opacity: 0; transform: translateY(16px); }
    100% { opacity: 1; transform: translateY(0); }
}

.search-box {
    position: relative;
    max-width: 400px;
    flex: 1;
    min-width: 240px;
}

.search-box svg {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-dimmed);
    width: 18px;
    height: 18px;
    transition: color 0.2s ease;
}

.search-box:focus-within svg { color: var(--primary); }

.search-input {
    width: 100%;
    padding: 11px 16px 11px 44px;
    background: rgba(255, 255, 255, 0.035);
    border: 1px solid var(--border-color);
    border-radius: var(--r-md);
    color: #ffffff;
    font-family: var(--font-sans);
    font-size: 0.9rem;
    transition: var(--transition);
}

.search-input::placeholder { color: var(--text-dimmed); }
.search-input:hover { border-color: var(--border-strong); }
.search-input:focus {
    outline: none;
    border-color: var(--primary);
    background: rgba(255, 255, 255, 0.06);
    box-shadow: 0 0 0 3px var(--primary-glow);
}

.tags-filter { display: flex; gap: var(--s-2); flex-wrap: wrap; }

.tag-btn {
    background: rgba(255, 255, 255, 0.045);
    border: 1px solid var(--border-color);
    color: var(--text-muted);
    padding: 6px 14px;
    border-radius: var(--r-pill);
    font-size: 0.82rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.tag-btn:hover {
    background: rgba(255, 255, 255, 0.09);
    border-color: var(--border-strong);
    color: var(--text-main);
}

.tag-btn.active {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-press) 100%);
    border-color: transparent;
    color: #ffffff;
    box-shadow: var(--shadow-primary);
}

/* Photo gallery grid */
.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
    gap: var(--s-6);
}

.photo-card {
    position: relative;
    border-radius: var(--r-lg);
    overflow: hidden;
    cursor: pointer;
    transition: transform 0.25s var(--ease-out), box-shadow 0.4s var(--ease-out), border-color 0.4s var(--ease-out);
    aspect-ratio: 4 / 3;
    opacity: 0;
    background: var(--bg-base-2);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    transform-origin: center;
    will-change: transform;
    /* Entrance uses the individual translate/scale properties so that `transform`
       stays free for hover lift + JS 3D tilt (animation-fill-mode would otherwise
       lock `transform` and disable the hover effect). */
    animation: cardEntrance 0.7s var(--ease-out) forwards;
}

@keyframes cardEntrance {
    0%   { opacity: 0; translate: 0 24px; scale: 0.97; }
    100% { opacity: 1; translate: 0 0; scale: 1; }
}

/* Light sheen that sweeps across on hover */
.photo-card::before {
    content: '';
    position: absolute;
    inset: 0;
    z-index: 2;
    pointer-events: none;
    background: linear-gradient(105deg,
        transparent 35%,
        rgba(255, 255, 255, 0.16) 47%,
        rgba(255, 255, 255, 0.30) 50%,
        rgba(255, 255, 255, 0.16) 53%,
        transparent 65%);
    transform: translateX(-130%);
    opacity: 0;
    transition: transform 0.9s var(--ease-out), opacity 0.3s ease;
}
.photo-card:hover::before { transform: translateX(130%); opacity: 1; }

.photo-card:nth-child(1) { animation-delay: 0.05s; }
.photo-card:nth-child(2) { animation-delay: 0.10s; }
.photo-card:nth-child(3) { animation-delay: 0.15s; }
.photo-card:nth-child(4) { animation-delay: 0.20s; }
.photo-card:nth-child(5) { animation-delay: 0.25s; }
.photo-card:nth-child(6) { animation-delay: 0.30s; }
.photo-card:nth-child(7) { animation-delay: 0.35s; }
.photo-card:nth-child(8) { animation-delay: 0.40s; }
.photo-card:nth-child(9) { animation-delay: 0.45s; }
.photo-card:nth-child(10) { animation-delay: 0.50s; }
.photo-card:nth-child(11) { animation-delay: 0.55s; }
.photo-card:nth-child(12) { animation-delay: 0.60s; }
.photo-card:nth-child(n+13) { animation-delay: 0.65s; }

.photo-card img,
.photo-card video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s var(--ease-out), filter 0.6s var(--ease-out);
    display: block;
}
/* Card video is a silent thumbnail — clicks go to the card (open lightbox) */
.photo-card video { pointer-events: none; background: var(--bg-base-2); }
.photo-card:hover video { transform: scale(1.08); filter: brightness(1.05) saturate(1.08); }

/* Play badge on video cards */
.video-badge {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 54px;
    height: 54px;
    border-radius: 50%;
    background: rgba(5, 7, 15, 0.5);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    border: 1px solid rgba(255, 255, 255, 0.25);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    z-index: 4;
    pointer-events: none;
    transition: transform 0.3s var(--ease-out), background 0.3s ease, border-color 0.3s ease;
}
.video-badge .lucide { width: 24px; height: 24px; margin-left: 3px; }
.photo-card:hover .video-badge {
    transform: translate(-50%, -50%) scale(1.12);
    background: var(--primary);
    border-color: var(--primary);
    box-shadow: var(--shadow-primary);
}

.photo-overlay {
    position: absolute;
    inset: 0;
    z-index: 3;
    background: linear-gradient(to top, rgba(5, 7, 15, 0.96) 0%, rgba(5, 7, 15, 0.45) 45%, rgba(5, 7, 15, 0) 100%);
    opacity: 0;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: var(--s-5);
    transition: opacity 0.35s var(--ease-smooth);
}

/* Staggered reveal of the overlay content */
.photo-overlay > * {
    opacity: 0;
    transform: translateY(14px);
    transition: opacity 0.45s var(--ease-out), transform 0.45s var(--ease-out);
}

.photo-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg), 0 0 0 1px var(--primary), 0 20px 55px -14px var(--primary-glow);
    border-color: transparent;
}

.photo-card:hover img { transform: scale(1.08); filter: brightness(1.05) saturate(1.08); }
.photo-card:hover .photo-overlay { opacity: 1; }
.photo-card:hover .photo-overlay > * { opacity: 1; transform: translateY(0); }
.photo-card:hover .photo-title   { transition-delay: 0.04s; }
.photo-card:hover .photo-meta    { transition-delay: 0.11s; }
.photo-card:hover .photo-actions { transition-delay: 0.18s; }

.photo-title {
    font-size: 1rem;
    font-weight: 600;
    color: #ffffff;
    margin-bottom: var(--s-1);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.photo-meta {
    font-size: 0.74rem;
    color: var(--text-muted);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.photo-actions {
    display: flex;
    gap: var(--s-2);
    margin-top: var(--s-3);
}

.action-btn {
    background: rgba(255, 255, 255, 0.12);
    backdrop-filter: blur(6px);
    border: 1px solid rgba(255, 255, 255, 0.12);
    color: #ffffff;
    width: 34px;
    height: 34px;
    border-radius: var(--r-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
}

.action-btn:hover { background: var(--primary); border-color: var(--primary); }
.action-btn.btn-delete-card:hover { background: var(--danger); border-color: var(--danger); }

/* Modal & overlay */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(3, 5, 11, 0.72);
    backdrop-filter: blur(0px);
    -webkit-backdrop-filter: blur(0px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.35s var(--ease-out), backdrop-filter 0.4s ease, -webkit-backdrop-filter 0.4s ease;
    padding: var(--s-5);
}

.modal-overlay.active {
    opacity: 1;
    pointer-events: auto;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.modal-content {
    width: 100%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
    padding: var(--s-8);
    position: relative;
    transform: translateY(20px) scale(0.96);
    /* Slight overshoot for a lively "spring" pop */
    transition: transform 0.45s cubic-bezier(0.34, 1.4, 0.5, 1);
}

.modal-overlay.active .modal-content { transform: translateY(0) scale(1); }

/* Staggered reveal of modal content (panel pops in, then its contents) */
.modal-content .modal-header,
.modal-content .form-group,
.modal-content .upload-dropzone,
.modal-content > form > .btn {
    opacity: 0;
    transform: translateY(12px);
}
.modal-overlay.active .modal-content .modal-header,
.modal-overlay.active .modal-content .form-group,
.modal-overlay.active .modal-content .upload-dropzone,
.modal-overlay.active .modal-content > form > .btn {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.4s var(--ease-out), transform 0.4s var(--ease-out);
}
.modal-overlay.active .modal-content .modal-header      { transition-delay: 0.10s; }
.modal-overlay.active .modal-content .upload-dropzone   { transition-delay: 0.14s; }
.modal-overlay.active .modal-content .form-group:nth-of-type(1) { transition-delay: 0.16s; }
.modal-overlay.active .modal-content .form-group:nth-of-type(2) { transition-delay: 0.20s; }
.modal-overlay.active .modal-content .form-group:nth-of-type(3) { transition-delay: 0.24s; }
.modal-overlay.active .modal-content .form-group:nth-of-type(4) { transition-delay: 0.28s; }
.modal-overlay.active .modal-content .form-group:nth-of-type(n+5) { transition-delay: 0.30s; }
.modal-overlay.active .modal-content > form > .btn      { transition-delay: 0.32s; }

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--s-6);
}

.modal-header h3 {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.close-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 6px;
    border-radius: 50%;
    transition: var(--transition);
    display: flex;
}

.close-btn:hover { color: #ffffff; background: rgba(255, 255, 255, 0.1); }

/* Drag and drop zone */
.upload-dropzone {
    border: 2px dashed var(--border-strong);
    border-radius: var(--r-md);
    padding: var(--s-8) var(--s-5);
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    background: rgba(255, 255, 255, 0.015);
    margin-bottom: var(--s-5);
}

.upload-dropzone:hover, .upload-dropzone.dragover {
    border-color: var(--primary);
    background: rgba(99, 102, 241, 0.07);
}

.upload-dropzone svg { color: var(--text-dimmed); margin-bottom: var(--s-3); transition: var(--transition); }
.upload-dropzone:hover svg, .upload-dropzone.dragover svg { color: var(--primary); transform: translateY(-3px); }
.upload-dropzone p { font-size: 0.9rem; color: var(--text-muted); }
.upload-dropzone span { font-size: 0.75rem; color: var(--text-dimmed); display: block; margin-top: var(--s-1); }

/* Upload progress */
.progress-container { margin-top: var(--s-5); display: none; }
.progress-container.active { animation: progReveal 0.4s var(--ease-out); }
@keyframes progReveal {
    0%   { opacity: 0; transform: translateY(8px); }
    100% { opacity: 1; transform: translateY(0); }
}

.progress-bar-bg {
    position: relative;
    background: rgba(255, 255, 255, 0.08);
    height: 10px;
    border-radius: var(--r-pill);
    overflow: hidden;
    box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.35);
}

.progress-bar-fill {
    position: relative;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    height: 100%;
    width: 0%;
    border-radius: var(--r-pill);
    box-shadow: 0 0 14px var(--primary-glow);
    transition: width 0.35s var(--ease-out), background 0.4s ease, box-shadow 0.4s ease;
    overflow: hidden;
}

/* Moving candy-stripes convey ongoing activity */
.progress-bar-fill::after {
    content: '';
    position: absolute;
    inset: 0;
    background: repeating-linear-gradient(45deg,
        rgba(255, 255, 255, 0.16) 0 8px,
        transparent 8px 16px);
    background-size: 22px 22px;
    animation: progStripes 0.6s linear infinite;
    opacity: 1;
    transition: opacity 0.3s ease;
}
@keyframes progStripes {
    from { background-position: 0 0; }
    to   { background-position: 22px 0; }
}

/* Success state: turn green, stop the stripes, glow */
.progress-bar-fill.done {
    background: linear-gradient(90deg, var(--success), #34d399);
    box-shadow: 0 0 16px rgba(16, 185, 129, 0.45);
}
.progress-bar-fill.done::after { opacity: 0; }

.progress-text {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: var(--s-3);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--s-3);
}

.progress-percent {
    font-weight: 700;
    font-size: 0.95rem;
    color: var(--text-main);
    font-variant-numeric: tabular-nums;
    letter-spacing: -0.01em;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: color 0.3s ease;
}
.progress-percent.done { color: var(--success); }
.progress-percent.done::before {
    content: '';
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--success);
    -webkit-mask: url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='3.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M20 6L9 17l-5-5'/%3E%3C/svg%3E") center/72% no-repeat;
    mask: url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='3.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M20 6L9 17l-5-5'/%3E%3C/svg%3E") center/72% no-repeat;
    animation: checkPop 0.4s var(--ease-out);
}
@keyframes checkPop {
    0%   { transform: scale(0); }
    60%  { transform: scale(1.25); }
    100% { transform: scale(1); }
}

.progress-size { color: var(--text-dimmed); font-size: 0.75rem; text-align: right; }

/* Lightbox */
.lightbox-overlay {
    position: fixed;
    inset: 0;
    background: rgba(3, 5, 11, 0.94);
    backdrop-filter: blur(18px);
    display: flex;
    z-index: 2000;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.4s var(--ease-out);
}

.lightbox-overlay.active { opacity: 1; pointer-events: auto; }

.lightbox-main {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: var(--s-8);
    min-width: 0;
}

.lightbox-img-wrapper {
    max-width: 100%;
    max-height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.lightbox-img {
    max-width: 100%;
    max-height: 86vh;
    object-fit: contain;
    border-radius: var(--r-md);
    box-shadow: var(--shadow-lg);
    opacity: 0;
    transform: scale(0.94);
    transition: transform 0.55s var(--ease-out), opacity 0.4s ease;
}

.lightbox-overlay.active .lightbox-img { opacity: 1; transform: scale(1); }

/* Lightbox video player mirrors the image styling/entrance */
.lightbox-video {
    max-width: 100%;
    max-height: 86vh;
    border-radius: var(--r-md);
    box-shadow: var(--shadow-lg);
    background: #000;
    opacity: 0;
    transform: scale(0.94);
    transition: transform 0.55s var(--ease-out), opacity 0.4s ease;
}
.lightbox-overlay.active .lightbox-video { opacity: 1; transform: scale(1); }

/* Thin loading bar shown while the next image is being fetched */
.lightbox-loader {
    position: absolute;
    top: 0;
    left: 0;
    height: 3px;
    width: 100%;
    z-index: 20;
    background: linear-gradient(90deg, transparent, var(--primary), var(--accent), transparent);
    background-size: 40% 100%;
    background-repeat: no-repeat;
    opacity: 0;
    transition: opacity 0.2s ease;
    pointer-events: none;
}
.lightbox-loader.active { opacity: 1; animation: lbLoad 0.9s var(--ease-smooth) infinite; }
@keyframes lbLoad {
    0%   { background-position: -40% 0; }
    100% { background-position: 140% 0; }
}

.lightbox-btn {
    position: absolute;
    background: rgba(255, 255, 255, 0.06);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    color: #ffffff;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    transition: transform 0.25s var(--ease-out), background 0.25s ease,
                border-color 0.25s ease, box-shadow 0.25s ease, opacity 0.4s ease 0.15s;
    z-index: 10;
}

.lightbox-overlay.active .lightbox-btn { opacity: 1; }

.lightbox-btn:hover {
    background: var(--primary);
    border-color: var(--primary);
    box-shadow: var(--shadow-primary);
    transform: scale(1.06);
}
.lightbox-prev:hover, .lightbox-next:hover { transform: translateY(-50%) scale(1.06); }

.lightbox-prev { left: 24px; top: 50%; transform: translateY(-50%); }
.lightbox-next { right: 24px; top: 50%; transform: translateY(-50%); }
.lightbox-close { top: 24px; right: 24px; }

.lightbox-sidebar {
    width: 370px;
    flex-shrink: 0;
    border-left: 1px solid var(--border-color);
    background: rgba(10, 14, 28, 0.7);
    backdrop-filter: blur(24px);
    padding: var(--s-8);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    gap: var(--s-6);
    overflow-y: auto;
    z-index: 5;
    opacity: 0;
    transform: translateX(40px);
    transition: opacity 0.5s ease 0.08s, transform 0.55s var(--ease-out) 0.08s;
}

.lightbox-overlay.active .lightbox-sidebar { opacity: 1; transform: translateX(0); }

.lightbox-info-header { margin-bottom: var(--s-5); }

.lightbox-title {
    font-size: 1.35rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: var(--s-2);
    word-break: break-word;
}

.lightbox-desc {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: var(--s-5);
    white-space: pre-line;
    word-break: break-word;
}

.lightbox-tags-container {
    display: flex;
    flex-wrap: wrap;
    gap: var(--s-2);
    margin-bottom: var(--s-6);
}

.lightbox-tag {
    background: rgba(99, 102, 241, 0.12);
    border: 1px solid rgba(99, 102, 241, 0.25);
    color: #b4bdff;
    padding: 4px 12px;
    border-radius: var(--r-pill);
    font-size: 0.75rem;
    font-weight: 500;
}

.lightbox-file-details { border-top: 1px solid var(--border-color); padding-top: var(--s-5); }

.detail-item {
    display: flex;
    justify-content: space-between;
    gap: var(--s-4);
    font-size: 0.8rem;
    margin-bottom: 10px;
}

.detail-item span:first-child { color: var(--text-dimmed); flex-shrink: 0; }
.detail-item span:last-child { color: var(--text-muted); text-align: right; word-break: break-word; }

.lightbox-actions { display: flex; gap: var(--s-3); margin-top: var(--s-4); }
.lightbox-actions-panel { display: flex; flex-direction: column; }

/* Empty state */
.empty-state { text-align: center; padding: 72px 20px; }
.empty-state h3 { font-size: 1.25rem; font-weight: 700; margin-bottom: var(--s-2); letter-spacing: -0.02em; }
.empty-state p { color: var(--text-muted); font-size: 0.9rem; max-width: 420px; margin: 0 auto; }

/* Custom empty-state illustration */
.empty-illust {
    width: 140px;
    height: 140px;
    display: block;
    margin: 0 auto var(--s-5);
    animation: egFloat 5.5s ease-in-out infinite;
}
.empty-illust .eg-back  { fill: rgba(255, 255, 255, 0.03); stroke: var(--border-strong); stroke-width: 2; }
.empty-illust .eg-frame { fill: rgba(255, 255, 255, 0.02); stroke: url(#egGrad); stroke-width: 2.5; }
.empty-illust .eg-sun   { fill: url(#egGrad); }
.empty-illust .eg-mount { fill: none; stroke: url(#egGrad); stroke-width: 2.5; stroke-linejoin: round; stroke-linecap: round; }
.empty-illust .eg-spark {
    fill: var(--accent);
    transform-origin: 95px 33px;
    animation: egTwinkle 2.6s ease-in-out infinite;
}
@keyframes egFloat  { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-9px); } }
@keyframes egTwinkle { 0%, 100% { opacity: 0.35; transform: scale(0.8); } 50% { opacity: 1; transform: scale(1.1); } }

/* Responsive */
@media (max-width: 900px) {
    .lightbox-overlay { flex-direction: column; }
    .lightbox-sidebar {
        width: 100%;
        border-left: none;
        border-top: 1px solid var(--border-color);
        height: auto;
        max-height: 42vh;
        transform: translateY(30px);
    }
    .lightbox-overlay.active .lightbox-sidebar { transform: translateY(0); }
    .lightbox-main { padding: 60px 20px 20px; }
    .lightbox-img { max-height: 46vh; }
    .lightbox-prev { left: 12px; }
    .lightbox-next { right: 12px; }
}

@media (max-width: 600px) {
    .app-container { padding: var(--s-4); }
    .app-header { flex-direction: column; align-items: stretch; text-align: center; }
    .brand-title { justify-content: center; }
    .header-actions { justify-content: center; }
    .header-actions .btn { flex: 1; justify-content: center; }
    .control-bar { flex-direction: column; align-items: stretch; }
    .search-box { max-width: none; }
    .gallery-grid { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: var(--s-3); }
    .modal-content { padding: var(--s-5); }
}

/* ==========================================================================
   Icon size utilities (replace inline width/height on lucide icons so a strict
   Content-Security-Policy without 'unsafe-inline' can be enforced)
   ========================================================================== */
.lucide { width: 20px; height: 20px; flex-shrink: 0; }
.ic-14 { width: 14px; height: 14px; }
.ic-16 { width: 16px; height: 16px; }
.ic-18 { width: 18px; height: 18px; }
.ic-24 { width: 24px; height: 24px; }
.ic-32 { width: 32px; height: 32px; }
.ic-36 { width: 36px; height: 36px; }
.ic-48 { width: 48px; height: 48px; }
.ic-inline { display: inline; vertical-align: middle; }
.ic-primary { color: var(--primary); }

/* ==========================================================================
   Component classes (moved out of inline styles)
   ========================================================================== */

/* Viewer-mode badge in the header */
.user-badge {
    font-size: 0.85rem;
    padding: 6px 12px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    border-radius: var(--r-pill);
    color: var(--text-muted);
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

/* Success / error flash notifications */
.notification {
    margin-bottom: var(--s-5);
    padding: 15px 20px;
    border-radius: var(--r-md);
    display: flex;
    align-items: center;
    gap: var(--s-3);
    font-size: 0.9rem;
    color: var(--text-main);
    animation: slideUp 0.4s var(--ease-out);
}
.success-notification { border-left: 4px solid var(--primary); }
.success-notification .lucide { color: var(--primary); }
.error-notification { border-left: 4px solid var(--danger); }
.error-notification .lucide { color: var(--danger); }

@keyframes slideUp {
    0%   { opacity: 0; transform: translateY(12px); }
    100% { opacity: 1; transform: translateY(0); }
}

/* Modal separator + section heading */
.modal-separator { margin: var(--s-6) 0 var(--s-4); border-top: 1px solid var(--border-color); }
.modal-subheader { padding: 0 0 var(--s-3); }
.modal-subheader h3 { font-size: 1.05rem; color: var(--text-main); display: flex; align-items: center; gap: 6px; }

/* Registered users list */
.users-empty { color: var(--text-muted); font-size: 0.9rem; text-align: center; padding: var(--s-3) 0; }
.users-list-container {
    max-height: 220px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 10px;
    padding-right: 4px;
}
.user-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 12px;
    background: rgba(255, 255, 255, 0.025);
    border-radius: var(--r-sm);
    border: 1px solid var(--border-color);
    box-shadow: none;
}
.user-item-name { display: flex; align-items: center; gap: var(--s-2); color: var(--text-main); font-size: 0.9rem; }
.user-item-name .lucide { color: var(--primary); }
.user-item form { margin: 0; display: inline; }

.btn-user-delete {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger);
    border: 1px solid rgba(239, 68, 68, 0.22);
    padding: 5px 10px;
    border-radius: var(--r-sm);
    font-size: 0.82rem;
    font-family: var(--font-sans);
    cursor: pointer;
    transition: var(--transition);
}
.btn-user-delete:hover { background: rgba(239, 68, 68, 0.2); border-color: rgba(239, 68, 68, 0.4); }

/* Utility: toggled by PHP / JS instead of inline display styles */
.is-hidden { display: none !important; }

/* ==========================================================================
   Signature footer / credit
   ========================================================================== */
.app-footer {
    margin-top: var(--s-8);
    padding: var(--s-6) var(--s-4) calc(var(--s-4) + env(safe-area-inset-bottom, 0px));
    display: flex;
    justify-content: center;
    animation: controlReveal 0.8s var(--ease-out) 0.3s both;
}

.credit {
    display: inline-flex;
    align-items: center;
    gap: var(--s-2);
    font-size: 0.82rem;
    font-weight: 500;
    letter-spacing: 0.01em;
    color: var(--text-dimmed);
    padding: 8px 16px;
    border-radius: var(--r-pill);
    border: 1px solid var(--border-color);
    background: rgba(255, 255, 255, 0.02);
    transition: var(--transition);
    text-decoration: none;
}
.credit:hover {
    color: var(--text-muted);
    border-color: var(--border-strong);
    background: rgba(255, 255, 255, 0.05);
    transform: translateY(-2px);
}
.credit .lucide { width: 15px; height: 15px; color: var(--accent); }
.credit b {
    font-weight: 700;
    background: linear-gradient(135deg, #c7d0ff 0%, #f0a8d4 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Auth page credit sits centred under the card */
.auth-credit {
    margin-top: var(--s-5);
    text-align: center;
    font-size: 0.78rem;
    color: var(--text-dimmed);
    letter-spacing: 0.02em;
}
.auth-credit b {
    font-weight: 700;
    background: linear-gradient(135deg, #c7d0ff 0%, #f0a8d4 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* ==========================================================================
   Touch devices — no hover, so reveal card info & enlarge tap targets
   ========================================================================== */
@media (hover: none) {
    .photo-overlay {
        opacity: 1;
        background: linear-gradient(to top, rgba(5, 7, 15, 0.92) 0%, rgba(5, 7, 15, 0.15) 55%, rgba(5, 7, 15, 0) 100%);
        padding: var(--s-4);
    }
    /* No hover on touch: reveal overlay content unconditionally and drop the sheen */
    .photo-overlay > * { opacity: 1; transform: none; }
    .photo-card::before { display: none; }
    .photo-title { font-size: 0.9rem; }
    .action-btn { width: 40px; height: 40px; }
    .photo-card:active { transform: scale(0.98); }
    .tag-btn { padding: 8px 16px; }
}

/* ==========================================================================
   Refined responsive layout
   ========================================================================== */

/* Safe-area padding for notched devices */
.app-container {
    padding-left: max(var(--s-6), env(safe-area-inset-left));
    padding-right: max(var(--s-6), env(safe-area-inset-right));
}

@media (max-width: 768px) {
    .app-header { top: 0; border-radius: var(--r-md); }
    .lightbox-close { top: max(16px, env(safe-area-inset-top)); }
}

@media (max-width: 600px) {
    /* Header: brand + compact icon actions */
    .brand-title h2 { font-size: 1.15rem; }
    .header-actions { gap: var(--s-2); width: 100%; }
    .header-actions .btn { flex: 1 1 auto; padding: 11px 12px; font-size: 0.82rem; }

    /* Modals become bottom sheets */
    .modal-overlay { align-items: flex-end; padding: 0; }
    .modal-content {
        max-width: 100%;
        max-height: 92vh;
        border-radius: var(--r-xl) var(--r-xl) 0 0;
        padding: var(--s-6) var(--s-5) calc(var(--s-6) + env(safe-area-inset-bottom, 0px));
        transform: translateY(100%);
    }
    .modal-overlay.active .modal-content { transform: translateY(0); }
    /* Grab handle */
    .modal-content::before {
        content: '';
        position: absolute;
        top: 10px;
        left: 50%;
        transform: translateX(-50%);
        width: 40px;
        height: 4px;
        border-radius: var(--r-pill);
        background: rgba(255, 255, 255, 0.18);
    }
    .modal-header { margin-top: var(--s-3); }
}

@media (max-width: 440px) {
    .gallery-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
    .lightbox-main { padding: 54px 12px 12px; }
    .lightbox-sidebar { padding: var(--s-5); }
    .lightbox-btn { width: 42px; height: 42px; }
}

/* Respect reduced motion preferences */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.001ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}
