/* ==========================================================================
   WALLSPACE — CYBER VAULT WITH SLEEK VERTICAL SIDEBAR
   ========================================================================== */

/* ===== CSS VARIABLES & TOKENS ===== */
:root {
    --sidebar-width: 270px;
    --bg-deep: #070c18;
    --bg-sidebar: #090f1f;
    --bg-panel: rgba(11, 18, 36, 0.85);
    --bg-panel-hover: rgba(16, 26, 50, 0.95);
    --bg-glass-card: rgba(13, 22, 44, 0.75);
    --border-subtle: rgba(255, 255, 255, 0.08);
    --border-hover: #da7756;
    --border-active: #38bdf8;
    --accent: #da7756;
    --accent-dark: #c2410c;
    --cyan: #38bdf8;
    --indigo: #6366f1;
    --green: #22c55e;
    --pink: #f472b6;
    --text-primary: #f0f4f8;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --font-main: 'Space Grotesk', 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    --glass-blur: blur(16px);
    --card-radius: 10px;
    --transition-smooth: cubic-bezier(0.16, 1, 0.3, 1);
}

/* ===== LIGHT THEME OVERRIDES ===== */
[data-theme="light"] {
    --bg-deep: #f1f5f9;
    --bg-sidebar: #ffffff;
    --bg-panel: rgba(255, 255, 255, 0.92);
    --bg-panel-hover: #ffffff;
    --bg-glass-card: #ffffff;
    --border-subtle: rgba(15, 23, 42, 0.1);
    --border-hover: #c2410c;
    --border-active: #0284c7;
    --accent: #c2410c;
    --accent-dark: #9a3412;
    --cyan: #0284c7;
    --text-primary: #0f172a;
    --text-secondary: #334155;
    --text-muted: #64748b;
}

/* ===== DIRECTIONAL THEME SWEEP (DARK FROM LEFT, LIGHT FROM RIGHT) ===== */
* {
    view-transition-name: none !important;
}

:root {
    view-transition-name: root !important;
}

::view-transition-group(root) {
    animation-duration: 0.6s;
    animation-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
}

/* 1. TO DARK: Sweeps in from LEFT */
html.theme-transition-to-dark::view-transition-old(root) {
    animation: 0.6s cubic-bezier(0.4, 0, 0.2, 1) both themeSweepOld;
    z-index: 1;
}

html.theme-transition-to-dark::view-transition-new(root) {
    animation: 0.6s cubic-bezier(0.4, 0, 0.2, 1) both sweepFromLeft;
    z-index: 99999;
}

@keyframes sweepFromLeft {
    0% {
        clip-path: inset(0 100% 0 0);
    }
    100% {
        clip-path: inset(0 0 0 0);
    }
}

/* 2. TO LIGHT: Sweeps in from RIGHT */
html.theme-transition-to-light::view-transition-old(root) {
    animation: 0.6s cubic-bezier(0.4, 0, 0.2, 1) both themeSweepOld;
    z-index: 1;
}

html.theme-transition-to-light::view-transition-new(root) {
    animation: 0.6s cubic-bezier(0.4, 0, 0.2, 1) both sweepFromRight;
    z-index: 99999;
}

@keyframes sweepFromRight {
    0% {
        clip-path: inset(0 0 0 100%);
    }
    100% {
        clip-path: inset(0 0 0 0);
    }
}

@keyframes themeSweepOld {
    0%   { opacity: 1; }
    100% { opacity: 1; }
}

/* ===== RESET & BASE ===== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    min-height: 100vh;
    background: var(--bg-deep);
    color: var(--text-primary);
    font-family: var(--font-main);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

/* ===== SUBTLE GRID BACKGROUND ===== */
.futuristic-grid-bg {
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    background-image: 
        radial-gradient(rgba(255, 255, 255, 0.06) 1px, transparent 1px);
    background-size: 28px 28px;
    opacity: 0.5;
}

[data-theme="light"] .futuristic-grid-bg {
    background-image: radial-gradient(rgba(15, 23, 42, 0.08) 1px, transparent 1px);
    opacity: 0.4;
}

/* ===== LOADING SCREEN ===== */
#loading-screen {
    position: fixed;
    inset: 0;
    z-index: 99999;
    background: var(--bg-deep);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    transition: opacity 0.5s ease;
}

.loader-grid {
    position: absolute;
    inset: 0;
    background-image: radial-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px);
    background-size: 32px 32px;
}

.loader-monogram {
    position: relative;
    z-index: 3;
    font-family: 'JetBrains Mono', monospace;
    font-size: clamp(2.8rem, 6vw, 4.2rem);
    font-weight: 800;
    letter-spacing: -0.04em;
    color: #ffffff;
    animation: loaderPulse 2.2s ease-in-out infinite alternate;
    margin-bottom: 0.3rem;
}

@keyframes loaderPulse {
    from { opacity: 0.9; }
    to   { opacity: 1; }
}

/* Glitch effect on ZeroIQ monogram */
.loader-monogram::before,
.loader-monogram::after {
    content: attr(data-text);
    position: absolute;
    top: 0; left: 0;
    width: 100%;
    height: 100%;
}

.loader-monogram::before {
    color: #38bdf8;
    clip-path: polygon(0 0, 100% 0, 100% 33%, 0 33%);
    transform: translateX(-3px);
    animation: glitchTop 3s steps(1) infinite;
    opacity: 0.8;
}

.loader-monogram::after {
    color: #f472b6;
    clip-path: polygon(0 66%, 100% 66%, 100% 100%, 0 100%);
    transform: translateX(3px);
    animation: glitchBottom 3s steps(1) infinite;
    opacity: 0.8;
}

@keyframes glitchTop {
    0%, 75%, 100% { transform: translateX(0); opacity: 0; }
    78%           { transform: translateX(-4px); opacity: 0.85; }
    82%           { transform: translateX(3px);  opacity: 0.85; }
    86%           { transform: translateX(-2px); opacity: 0.85; }
    90%           { transform: translateX(0);    opacity: 0; }
}

@keyframes glitchBottom {
    0%, 80%, 100% { transform: translateX(0); opacity: 0; }
    83%           { transform: translateX(4px);  opacity: 0.85; }
    87%           { transform: translateX(-3px); opacity: 0.85; }
    91%           { transform: translateX(2px);  opacity: 0.85; }
    95%           { transform: translateX(0);    opacity: 0; }
}

[data-theme="light"] .loader-monogram {
    color: #0f172a;
}

.loader-tagline {
    position: relative;
    z-index: 3;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 1.8rem;
}

.loader-progress-track {
    position: relative;
    z-index: 3;
    width: min(280px, 80vw);
    height: 3px;
    background: rgba(255,255,255,0.1);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 1.25rem;
}

.loader-progress-fill {
    height: 100%;
    width: 0%;
    background: var(--accent);
    animation: fillProgress 2.8s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

@keyframes fillProgress {
    0%   { width: 0%; }
    25%  { width: 28%; }
    55%  { width: 62%; }
    80%  { width: 88%; }
    100% { width: 100%; }
}

.loader-log {
    position: relative;
    z-index: 3;
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: var(--text-muted);
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.loader-log-line {
    opacity: 0;
    animation: logFadeIn 0.35s ease forwards;
}
.loader-log-line:nth-child(1) { animation-delay: 0.4s; }
.loader-log-line:nth-child(2) { animation-delay: 1.1s; }
.loader-log-line:nth-child(3) { animation-delay: 1.9s; }
.loader-log-line:nth-child(4) { animation-delay: 2.6s; }

@keyframes logFadeIn {
    from { opacity: 0; transform: translateY(3px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* ===== MASTER LAYOUT WITH FIXED SIDEBAR ===== */
.app-layout {
    display: flex;
    min-height: 100vh;
    position: relative;
    z-index: 1;
}

/* ===== LEFT VERTICAL SIDEBAR ===== */
.app-sidebar {
    width: var(--sidebar-width);
    height: 100vh;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    background: var(--bg-sidebar);
    border-right: 1px solid var(--border-subtle);
    display: flex;
    flex-direction: column;
    z-index: 1000;
    transition: transform 0.25s ease;
}

.sidebar-header {
    padding: 1.25rem 1rem 0.85rem 1rem;
    border-bottom: 1px solid var(--border-subtle);
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
}

.brand-section {
    display: flex;
    align-items: center;
    cursor: pointer;
    padding: 0.2rem 0.25rem;
}

.brand-title {
    font-size: 1.15rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    color: var(--text-primary);
    display: flex;
    align-items: baseline;
    gap: 0.35rem;
}

.brand-subtext {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--accent);
    letter-spacing: -0.01em;
}

/* Sidebar Scrollable Body */
.sidebar-content {
    flex: 1;
    overflow-y: auto;
    padding: 1rem 0.75rem;
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
    scrollbar-width: thin;
    scrollbar-color: rgba(255, 255, 255, 0.1) transparent;
}

.sidebar-content::-webkit-scrollbar {
    width: 4px;
}

.sidebar-content::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
}

.sidebar-section-title {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    color: var(--text-muted);
    padding: 0.6rem 0.6rem 0.3rem 0.6rem;
    text-transform: uppercase;
}

.sidebar-nav-group {
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
}

.sidebar-nav-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.55rem 0.75rem;
    border-radius: 6px;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-family: var(--font-main);
    font-size: 0.82rem;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.15s ease;
    text-align: left;
    width: 100%;
}

.sidebar-nav-item:hover {
    background: rgba(255, 255, 255, 0.04);
    color: var(--text-primary);
}

[data-theme="light"] .sidebar-nav-item:hover {
    background: rgba(15, 23, 42, 0.05);
}

.sidebar-nav-item.active {
    background: rgba(218, 119, 86, 0.12);
    color: #ffffff;
    font-weight: 700;
    border-left: 3px solid var(--accent);
}

[data-theme="light"] .sidebar-nav-item.active {
    background: rgba(194, 65, 12, 0.1);
    color: var(--accent);
}

.sidebar-item-left {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.sidebar-item-icon {
    font-size: 0.85rem;
    width: 16px;
    text-align: center;
    color: var(--text-muted);
}

.sidebar-nav-item.active .sidebar-item-icon {
    color: var(--accent);
}

.sidebar-item-count {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    background: rgba(0, 0, 0, 0.25);
    padding: 1px 6px;
    border-radius: 99px;
    color: var(--text-muted);
}

.sidebar-nav-item.active .sidebar-item-count {
    background: var(--accent);
    color: #ffffff;
}

/* Sidebar Footer */
.sidebar-footer {
    padding: 0.85rem 0.75rem;
    border-top: 1px solid var(--border-subtle);
    display: flex;
    flex-direction: column;
    gap: 0.45rem;
}

.sidebar-footer-row {
    display: flex;
    gap: 0.45rem;
}

.sidebar-btn {
    flex: 1;
    height: 32px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-subtle);
    border-radius: 6px;
    font-family: var(--font-mono);
    font-size: 0.72rem;
    font-weight: 600;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.15s ease;
}

[data-theme="light"] .sidebar-btn {
    background: rgba(15, 23, 42, 0.04);
}

.sidebar-btn:hover {
    color: var(--text-primary);
    border-color: var(--border-hover);
}

.sidebar-btn.primary-action {
    background: rgba(218, 119, 86, 0.12);
    border-color: rgba(218, 119, 86, 0.3);
    color: var(--accent);
}

.sidebar-btn.primary-action:hover {
    background: var(--accent);
    color: #ffffff;
}

/* ===== MAIN CONTENT VIEWPORT ===== */
.content-viewport {
    margin-left: var(--sidebar-width);
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
}

/* (mobile sidebar rules consolidated into single @media block below) */

/* ===== FEATURED SPOTLIGHT BANNER ===== */
#featured-spotlight {
    padding: 1.5rem clamp(0.75rem, 3vw, 2rem) 0 clamp(0.75rem, 3vw, 2rem);
}

.spotlight-card {
    position: relative;
    min-height: 260px;
    max-height: 320px;
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--border-subtle);
    background: var(--bg-panel);
    display: flex;
    align-items: flex-end;
}

.spotlight-bg-img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: brightness(0.6);
}

.spotlight-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(0deg, rgba(7, 12, 24, 0.95) 0%, rgba(7, 12, 24, 0.3) 60%, transparent 100%);
    pointer-events: none;
}

.spotlight-content {
    position: relative;
    z-index: 2;
    padding: 1.75rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    max-width: 650px;
}

.spotlight-badge {
    align-self: flex-start;
    background: rgba(218, 119, 86, 0.15);
    border: 1px solid var(--accent);
    color: var(--accent);
    font-family: var(--font-mono);
    font-size: 0.68rem;
    font-weight: 700;
    padding: 2px 8px;
    border-radius: 99px;
    letter-spacing: 0.08em;
}

.spotlight-title {
    font-size: clamp(1.4rem, 2.8vw, 1.9rem);
    font-weight: 800;
    letter-spacing: -0.02em;
    color: #ffffff;
}

.spotlight-chips {
    display: flex;
    gap: 0.4rem;
    flex-wrap: wrap;
}

.spotlight-chip {
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    padding: 2px 7px;
    font-family: var(--font-mono);
    font-size: 0.68rem;
    color: #f0f4f8;
}

.spotlight-actions {
    display: flex;
    gap: 0.6rem;
    margin-top: 0.4rem;
    flex-wrap: wrap;
}

.tool-btn,
.spotlight-actions button,
.spotlight-actions a {
    height: 36px;
    padding: 0 1rem;
    background: rgba(11, 18, 36, 0.8);
    border: 1px solid var(--border-subtle);
    border-radius: 6px;
    font-family: var(--font-mono);
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--text-primary);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.45rem;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.15s ease;
    outline: none;
}

[data-theme="light"] .tool-btn,
[data-theme="light"] .spotlight-actions button,
[data-theme="light"] .spotlight-actions a {
    background: #ffffff;
    color: #0f172a;
    border-color: rgba(15, 23, 42, 0.15);
}

.tool-btn:hover,
.spotlight-actions button:hover,
.spotlight-actions a:hover {
    border-color: var(--border-hover);
    color: #ffffff;
    background: rgba(255, 255, 255, 0.1);
}

.tool-btn.primary,
.spotlight-actions .primary {
    background: var(--accent);
    border-color: var(--accent);
    color: #ffffff;
}

.tool-btn.primary:hover,
.spotlight-actions .primary:hover {
    background: var(--accent-dark);
    border-color: var(--accent-dark);
    color: #ffffff;
}

/* ===== MAIN VAULT GRID ===== */
#vault-main {
    padding: 1.5rem clamp(0.75rem, 3vw, 2rem) 4rem clamp(0.75rem, 3vw, 2rem);
}

.vault-header-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border-subtle);
}

.vault-count-label {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    color: var(--text-secondary);
}

.vault-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.25rem;
}

@media (max-width: 768px) {
    .vault-grid {
        grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
        gap: 0.85rem;
    }
}

/* ===== WALLPAPER CARDS (60-144 FPS OPTIMIZED) ===== */
.wallpaper-card {
    position: relative;
    border-radius: var(--card-radius);
    background: var(--bg-glass-card);
    border: 1px solid var(--border-subtle);
    overflow: hidden;
    cursor: pointer;
    opacity: 1;
    display: flex;
    flex-direction: column;
    transition: border-color 0.15s ease;
    content-visibility: auto;
    contain-intrinsic-size: 280px 240px;
}

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

.card-thumb-wrap {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 10;
    background: #091026;
    overflow: hidden;
}

.card-img {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: cover;
}

.card-top-badges {
    position: absolute;
    top: 0.6rem;
    left: 0.6rem;
    right: 0.6rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    pointer-events: none;
    z-index: 2;
}

.card-category-badge {
    background: rgba(7, 12, 24, 0.85);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 99px;
    padding: 2px 7px;
    font-family: var(--font-mono);
    font-size: 0.65rem;
    font-weight: 600;
    color: #ffffff;
}

.card-fav-btn {
    pointer-events: auto;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: rgba(7, 12, 24, 0.85);
    border: 1px solid rgba(255, 255, 255, 0.12);
    color: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    padding: 0;
    margin: 0;
    line-height: 1;
    cursor: pointer;
    transition: color 0.15s ease, background 0.15s ease, border-color 0.15s ease;
    box-sizing: border-box;
}

.card-fav-btn i {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1em;
    height: 1em;
    line-height: 1;
    margin: 0;
    padding: 0;
    text-align: center;
    vertical-align: middle;
}

.card-fav-btn:hover {
    color: var(--pink);
}

.card-fav-btn.active {
    background: var(--pink);
    border-color: var(--pink);
    color: #ffffff;
}

.card-info {
    padding: 0.7rem 0.85rem;
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
}

.card-title {
    font-size: 0.88rem;
    font-weight: 700;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.card-meta-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-family: var(--font-mono);
    font-size: 0.65rem;
    color: var(--text-muted);
}

.card-actions-row {
    display: flex;
    gap: 0.35rem;
    margin-top: 0.25rem;
}

.card-btn {
    flex: 1;
    height: 28px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-subtle);
    border-radius: 5px;
    font-family: var(--font-mono);
    font-size: 0.68rem;
    font-weight: 600;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.3rem;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.15s ease;
}

.card-btn:hover {
    background: var(--accent);
    border-color: var(--accent);
    color: #ffffff;
}

/* ===== SKELETON LOADING CARDS ===== */
.skeleton-card {
    border-radius: var(--card-radius);
    background: var(--bg-glass-card);
    border: 1px solid var(--border-subtle);
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.skeleton-thumb {
    width: 100%;
    aspect-ratio: 16 / 10;
    background: rgba(255, 255, 255, 0.04);
    position: relative;
    overflow: hidden;
}

.skeleton-thumb::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(
        90deg,
        transparent 0%,
        rgba(255, 255, 255, 0.06) 40%,
        rgba(255, 255, 255, 0.06) 60%,
        transparent 100%
    );
    animation: skeletonShimmer 1.5s ease-in-out infinite;
}

[data-theme="light"] .skeleton-thumb {
    background: rgba(15, 23, 42, 0.06);
}

[data-theme="light"] .skeleton-thumb::after {
    background: linear-gradient(
        90deg,
        transparent 0%,
        rgba(15, 23, 42, 0.06) 40%,
        rgba(15, 23, 42, 0.06) 60%,
        transparent 100%
    );
}

.skeleton-info {
    padding: 0.7rem 0.85rem;
    display: flex;
    flex-direction: column;
    gap: 0.45rem;
}

.skeleton-line {
    height: 10px;
    border-radius: 4px;
    background: rgba(255, 255, 255, 0.06);
    position: relative;
    overflow: hidden;
}

.skeleton-line::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(
        90deg,
        transparent 0%,
        rgba(255, 255, 255, 0.08) 40%,
        rgba(255, 255, 255, 0.08) 60%,
        transparent 100%
    );
    animation: skeletonShimmer 1.5s ease-in-out infinite;
}

[data-theme="light"] .skeleton-line {
    background: rgba(15, 23, 42, 0.08);
}

[data-theme="light"] .skeleton-line::after {
    background: linear-gradient(
        90deg,
        transparent 0%,
        rgba(15, 23, 42, 0.08) 40%,
        rgba(15, 23, 42, 0.08) 60%,
        transparent 100%
    );
}

.skeleton-line.title { width: 70%; height: 12px; }
.skeleton-line.meta  { width: 50%; height: 8px; }
.skeleton-line.btn   { width: 100%; height: 28px; border-radius: 5px; }

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

.wallpaper-card.skeleton-reveal {
    animation: skeletonFadeIn 0.3s ease forwards;
}

@keyframes skeletonFadeIn {
    from { opacity: 0; transform: translateY(6px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* ===== FULLSCREEN HD LIGHTBOX MODAL ===== */
#lightbox-modal {
    position: fixed;
    inset: 0;
    z-index: 10000;
    background: rgba(4, 8, 18, 0.96);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.25s ease;
}

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

.lightbox-dialog {
    position: relative;
    width: 94vw;
    height: 90vh;
    max-width: 1560px;
    background: var(--bg-panel);
    border: 1px solid var(--border-subtle);
    border-radius: 12px;
    display: flex;
    overflow: hidden;
}

.lightbox-main-view {
    flex: 1;
    position: relative;
    background: #050a18;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    padding: 1.5rem;
}

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

.lightbox-img {
    max-width: 100%;
    max-height: calc(90vh - 3rem);
    object-fit: contain;
    border-radius: 6px;
}

.lightbox-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: rgba(9, 16, 38, 0.85);
    border: 1px solid var(--border-subtle);
    color: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    cursor: pointer;
    z-index: 10;
    transition: background 0.15s ease;
}

.lightbox-arrow:hover {
    background: var(--accent);
    border-color: var(--accent);
}

.lightbox-arrow.prev { left: 1.25rem; }
.lightbox-arrow.next { right: 1.25rem; }

.lightbox-sidebar {
    width: 360px;
    max-width: 40%;
    background: var(--bg-panel);
    border-left: 1px solid var(--border-subtle);
    display: flex;
    flex-direction: column;
    padding: 1.75rem;
    gap: 1.15rem;
    overflow-y: auto;
}

/* ===== MOBILE HAMBURGER TOGGLE ===== */
.mobile-sidebar-toggle {
    display: none;
    position: fixed;
    top: 0.75rem;
    left: 0.75rem;
    z-index: 1100;
    width: 44px;
    height: 44px;
    border-radius: 8px;
    background: var(--bg-panel);
    border: 1px solid var(--border-subtle);
    color: var(--text-primary);
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    cursor: pointer;
}

/* ===== MOBILE SIDEBAR OVERLAY ===== */
.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 999;
    background: rgba(0, 0, 0, 0.55);
}

.sidebar-overlay.active {
    display: block;
}

@media (max-width: 900px) {
    .app-sidebar {
        transform: translateX(-100%);
    }
    .app-sidebar.open {
        transform: translateX(0);
    }
    .content-viewport {
        margin-left: 0;
    }
    .mobile-sidebar-toggle {
        display: flex;
    }
    .lightbox-dialog { flex-direction: column; height: 96vh; }
    .lightbox-sidebar { width: 100%; max-width: 100%; border-left: none; border-top: 1px solid var(--border-subtle); padding: 1.25rem; }
    .lightbox-img { max-height: 50vh; }

    /* Mobile touch target fixes */
    .card-fav-btn {
        width: 36px;
        height: 36px;
        font-size: 0.85rem;
    }
    .sidebar-btn {
        height: 44px;
    }
    .tool-btn,
    .spotlight-actions button,
    .spotlight-actions a {
        height: 44px;
        min-width: 44px;
    }
    .lightbox-close-btn {
        width: 44px;
        height: 44px;
    }
    .card-btn {
        height: 36px;
    }
}

/* ===== VERY SMALL PHONES (≤375px) ===== */
@media (max-width: 375px) {
    .vault-grid {
        grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
        gap: 0.6rem;
    }
    .spotlight-content {
        padding: 1rem;
    }
    .spotlight-title {
        font-size: 1.15rem;
    }
    .lightbox-dialog {
        width: 100vw;
        height: 100vh;
        border-radius: 0;
    }
}

.lightbox-close-btn {
    align-self: flex-end;
    width: 32px;
    height: 32px;
    border-radius: 6px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-subtle);
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: background 0.15s ease;
}

.lightbox-close-btn:hover {
    background: var(--accent);
    color: #ffffff;
}

.lightbox-meta-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    background: rgba(218, 119, 86, 0.12);
    border: 1px solid var(--accent);
    color: var(--accent);
    font-family: var(--font-mono);
    font-size: 0.72rem;
    font-weight: 700;
    padding: 3px 8px;
    border-radius: 99px;
    align-self: flex-start;
}

.lightbox-title {
    font-size: 1.35rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    color: var(--text-primary);
    line-height: 1.3;
}

.lightbox-details-grid {
    display: flex;
    flex-direction: column;
    gap: 0.65rem;
    background: rgba(0, 0, 0, 0.25);
    border: 1px solid var(--border-subtle);
    border-radius: 8px;
    padding: 1rem;
}

.detail-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-family: var(--font-mono);
    font-size: 0.75rem;
}

.detail-label {
    color: var(--text-muted);
}

.detail-value {
    color: var(--text-primary);
    font-weight: 600;
}

.lightbox-actions {
    display: flex;
    flex-direction: column;
    gap: 0.55rem;
    margin-top: auto;
}

.lightbox-btn {
    width: 100%;
    height: 40px;
    border-radius: 6px;
    font-family: var(--font-main);
    font-size: 0.85rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    cursor: pointer;
    text-decoration: none;
    transition: background 0.15s ease;
}

.lightbox-btn.primary {
    background: var(--accent);
    border: none;
    color: #ffffff;
}

.lightbox-btn.primary:hover {
    background: var(--accent-dark);
}

.lightbox-btn.secondary {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-subtle);
    color: var(--text-primary);
}

.lightbox-btn.secondary:hover {
    border-color: var(--border-hover);
    background: rgba(255, 255, 255, 0.08);
}

/* ===== TOAST NOTIFICATIONS ===== */
#toast-container {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    z-index: 100000;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    pointer-events: none;
}

.toast {
    background: var(--bg-panel);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border-subtle);
    border-radius: 6px;
    padding: 0.65rem 1.25rem;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.6rem;
    animation: toastSlideIn 0.25s ease, toastFadeOut 0.25s ease 2.5s forwards;
}

@keyframes toastSlideIn {
    from { transform: translateX(40px); opacity: 0; }
    to   { transform: translateX(0); opacity: 1; }
}

@keyframes toastFadeOut {
    to { transform: translateY(10px); opacity: 0; }
}