/* ═══════════════════════════════════════════════════════════
   DocVault — Premium Dark Glassmorphic Design System
   ═══════════════════════════════════════════════════════════ */

/* ─── CSS Custom Properties ───────────────────────────────── */
:root {
    --bg-primary: #0a0a0f;
    --bg-secondary: #111119;
    --bg-card: rgba(255, 255, 255, 0.04);
    --bg-card-hover: rgba(255, 255, 255, 0.07);
    --bg-input: rgba(255, 255, 255, 0.06);

    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-highlight: rgba(255, 255, 255, 0.12);

    --text-primary: #f0f0f5;
    --text-secondary: #8e8ea0;
    --text-muted: #5a5a6e;

    --accent-violet: #8B5CF6;
    --accent-cyan: #06B6D4;
    --accent-pink: #EC4899;
    --accent-green: #10B981;
    --accent-red: #EF4444;

    --gradient-primary: linear-gradient(135deg, #8B5CF6, #06B6D4);
    --gradient-accent: linear-gradient(135deg, #EC4899, #8B5CF6);
    --gradient-success: linear-gradient(135deg, #10B981, #06B6D4);

    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 16px 64px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 30px rgba(139, 92, 246, 0.15);

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;

    --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font);
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

/* ─── Ambient Background ──────────────────────────────────── */
.ambient-bg {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
}

.orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.4;
    animation: float 15s ease-in-out infinite;
}

.orb-1 {
    width: 500px; height: 500px;
    background: var(--accent-violet);
    top: -10%; left: -5%;
    animation-delay: 0s;
    opacity: 0.2;
}

.orb-2 {
    width: 400px; height: 400px;
    background: var(--accent-cyan);
    top: 50%; right: -10%;
    animation-delay: -5s;
    opacity: 0.15;
}

.orb-3 {
    width: 350px; height: 350px;
    background: var(--accent-pink);
    bottom: -10%; left: 30%;
    animation-delay: -10s;
    opacity: 0.12;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    25% { transform: translate(30px, -30px) scale(1.05); }
    50% { transform: translate(-20px, 20px) scale(0.95); }
    75% { transform: translate(15px, 15px) scale(1.02); }
}

/* ─── Container ───────────────────────────────────────────── */
.container {
    position: relative;
    z-index: 1;
    max-width: 720px;
    margin: 0 auto;
    padding: 40px 20px;
}

.vault-container {
    max-width: 900px;
}

/* ─── Glass Cards ─────────────────────────────────────────── */
.glass-card {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: 32px;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.glass-card:hover {
    border-color: var(--glass-highlight);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.glass-card-mini {
    background: var(--bg-card);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    padding: 24px;
    transition: var(--transition);
}

.glass-card-mini:hover {
    border-color: var(--glass-highlight);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* ─── Hero / Logo ─────────────────────────────────────────── */
.hero {
    text-align: center;
    margin-bottom: 40px;
    animation: fadeInUp 0.8s ease-out;
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-bottom: 16px;
}

.logo-icon {
    width: 48px;
    height: 48px;
}

.logo-text {
    font-size: 2.2rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    color: var(--text-primary);
}

.accent {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.tagline {
    font-size: 1.15rem;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.highlight {
    color: var(--accent-cyan);
    font-weight: 600;
}

.subtitle {
    font-size: 0.9rem;
    color: var(--text-muted);
}

/* ─── Section Titles ──────────────────────────────────────── */
.section-title {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 6px;
}

.section-desc {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 16px;
}

/* ─── Forms & Inputs ──────────────────────────────────────── */
.key-form {
    width: 100%;
}

.input-group {
    display: flex;
    align-items: center;
    background: var(--bg-input);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    padding: 4px;
    transition: var(--transition);
}

.input-group:focus-within {
    border-color: var(--accent-violet);
    box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.15);
}

.input-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    color: var(--text-muted);
    flex-shrink: 0;
}

.input-group input[type="text"] {
    flex: 1;
    background: none;
    border: none;
    outline: none;
    color: var(--text-primary);
    font-family: var(--font);
    font-size: 0.95rem;
    padding: 10px 4px;
    min-width: 0;
}

.input-group input::placeholder {
    color: var(--text-muted);
}

.hint {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 8px;
    padding-left: 4px;
}

/* ─── Buttons ─────────────────────────────────────────────── */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    border: none;
    cursor: pointer;
    font-family: var(--font);
    font-weight: 600;
    font-size: 0.9rem;
    border-radius: var(--radius-sm);
    padding: 10px 20px;
    transition: var(--transition);
    white-space: nowrap;
    flex-shrink: 0;
}

.btn-primary {
    background: var(--gradient-primary);
    color: #fff;
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 20px rgba(139, 92, 246, 0.35);
}

.btn-accent {
    background: var(--gradient-accent);
    color: #fff;
}

.btn-accent:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 20px rgba(236, 72, 153, 0.35);
}

.btn-danger {
    background: rgba(239, 68, 68, 0.15);
    color: var(--accent-red);
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.btn-danger:hover {
    background: rgba(239, 68, 68, 0.25);
}

.btn-sm {
    padding: 8px 14px;
    font-size: 0.8rem;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
}

/* ─── Divider ─────────────────────────────────────────────── */
.divider {
    display: flex;
    align-items: center;
    gap: 16px;
    margin: 28px 0;
    color: var(--text-muted);
    font-size: 0.8rem;
}

.divider::before,
.divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--glass-border);
}

/* ─── Features Grid ───────────────────────────────────────── */
.features {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-top: 40px;
    animation: fadeInUp 0.8s ease-out 0.2s backwards;
}

.feature {
    text-align: center;
}

.feature-icon {
    width: 48px;
    height: 48px;
    margin: 0 auto 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    background: rgba(139, 92, 246, 0.1);
    color: var(--accent, var(--accent-violet));
}

.feature h3 {
    font-size: 0.9rem;
    font-weight: 700;
    margin-bottom: 4px;
}

.feature p {
    font-size: 0.78rem;
    color: var(--text-muted);
    line-height: 1.4;
}

/* ─── Footer ──────────────────────────────────────────────── */
.footer {
    text-align: center;
    margin-top: 48px;
    padding: 20px;
    color: var(--text-muted);
    font-size: 0.8rem;
}

/* ─── Toast ───────────────────────────────────────────────── */
.toast {
    position: fixed;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%) translateY(120px);
    background: var(--bg-secondary);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    padding: 12px 24px;
    border-radius: var(--radius-md);
    font-family: var(--font);
    font-size: 0.85rem;
    font-weight: 500;
    box-shadow: var(--shadow-lg);
    z-index: 10000;
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    pointer-events: none;
    max-width: 90vw;
    text-align: center;
}

.toast.show {
    transform: translateX(-50%) translateY(0);
}

.toast.toast-error {
    border-color: rgba(239, 68, 68, 0.3);
    background: rgba(239, 68, 68, 0.15);
}

.toast.toast-success {
    border-color: rgba(16, 185, 129, 0.3);
    background: rgba(16, 185, 129, 0.12);
}

/* ─── Animations ──────────────────────────────────────────── */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

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

/* ═══════════════════════════════════════════════════════════
   VAULT PAGE STYLES
   ═══════════════════════════════════════════════════════════ */

/* ─── Vault Header ────────────────────────────────────────── */
.vault-header {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    margin-bottom: 32px;
    animation: fadeInUp 0.6s ease-out;
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 500;
    padding: 8px 12px;
    border-radius: var(--radius-sm);
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    transition: var(--transition);
    flex-shrink: 0;
    margin-top: 4px;
}

.back-link:hover {
    color: var(--text-primary);
    border-color: var(--glass-highlight);
}

.vault-title h1 {
    font-size: 1.4rem;
    font-weight: 700;
}

.vault-meta {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 2px;
}

/* ─── Upload Area ─────────────────────────────────────────── */
.upload-section {
    margin-bottom: 32px;
    animation: fadeInUp 0.6s ease-out 0.1s backwards;
}

.upload-area {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 40px 20px;
    border: 2px dashed var(--glass-border);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
}

.upload-area:hover,
.upload-area.dragover {
    border-color: var(--accent-violet);
    background: rgba(139, 92, 246, 0.05);
}

.upload-area.dragover {
    transform: scale(1.01);
}

.upload-icon {
    color: var(--text-muted);
    margin-bottom: 12px;
    transition: var(--transition);
}

.upload-area:hover .upload-icon {
    color: var(--accent-violet);
    transform: translateY(-4px);
}

.upload-text {
    font-weight: 600;
    margin-bottom: 4px;
}

.upload-hint {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* ─── Upload Progress ─────────────────────────────────────── */
.upload-progress {
    padding: 16px;
}

.progress-bar {
    height: 6px;
    background: var(--bg-input);
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: 8px;
}

.progress-fill {
    height: 100%;
    background: var(--gradient-primary);
    border-radius: 3px;
    width: 0%;
    transition: width 0.3s ease;
}

.progress-text {
    font-size: 0.8rem;
    color: var(--text-secondary);
    text-align: center;
}

/* ─── Documents Grid ──────────────────────────────────────── */
.docs-section {
    animation: fadeInUp 0.6s ease-out 0.2s backwards;
}

.docs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 16px;
    margin-top: 16px;
}

.doc-card {
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    overflow: hidden;
    cursor: pointer;
    transition: var(--transition);
    animation: fadeIn 0.4s ease-out;
}

.doc-card:hover {
    border-color: var(--accent-violet);
    transform: translateY(-3px);
    box-shadow: var(--shadow-md), 0 0 20px rgba(139, 92, 246, 0.1);
}

.doc-card-thumb {
    width: 100%;
    aspect-ratio: 1;
    overflow: hidden;
    background: var(--bg-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
}

.doc-card-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.doc-card:hover .doc-card-thumb img {
    transform: scale(1.05);
}

.doc-card-thumb .pdf-icon {
    color: var(--accent-red);
    font-size: 2rem;
    font-weight: 700;
}

.doc-card-info {
    padding: 10px 12px;
}

.doc-card-name {
    font-size: 0.78rem;
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.doc-card-size {
    font-size: 0.7rem;
    color: var(--text-muted);
    margin-top: 2px;
}

/* ─── Empty State ─────────────────────────────────────────── */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-muted);
}

.empty-state p {
    margin-top: 12px;
    font-size: 0.9rem;
}

/* ─── Modal ───────────────────────────────────────────────── */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(8px);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    animation: fadeIn 0.2s ease-out;
}

.modal {
    width: 100%;
    max-width: 800px;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    animation: fadeInUp 0.3s ease-out;
}

.modal-close {
    position: absolute;
    top: 16px;
    right: 16px;
    background: var(--bg-input);
    border: 1px solid var(--glass-border);
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    z-index: 10;
}

.modal-close:hover {
    background: var(--bg-card-hover);
    color: var(--text-primary);
}

.modal-content {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

/* Modal Preview */
.modal-preview {
    display: flex;
    align-items: center;
    gap: 16px;
}

.modal-preview img {
    width: 100px;
    height: 100px;
    object-fit: cover;
    border-radius: var(--radius-sm);
    border: 1px solid var(--glass-border);
    flex-shrink: 0;
}

.modal-doc-info h3 {
    font-size: 1rem;
    font-weight: 700;
    word-break: break-all;
}

.modal-doc-info p {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 4px;
}

/* Download Section */
.download-section {
    border-top: 1px solid var(--glass-border);
    padding-top: 20px;
}

.download-section:first-child {
    border-top: none;
    padding-top: 0;
}

.option-title {
    font-size: 0.95rem;
    font-weight: 700;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.option-badge {
    font-size: 0.65rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 2px 8px;
    border-radius: 20px;
    background: rgba(139, 92, 246, 0.15);
    color: var(--accent-violet);
}

/* Download Grid */
.download-grid {
    display: grid;
    gap: 2px;
    border-radius: var(--radius-sm);
    overflow: hidden;
    border: 1px solid var(--glass-border);
}

.download-grid-header {
    display: grid;
    grid-template-columns: 90px repeat(4, 1fr);
    background: rgba(255, 255, 255, 0.03);
}

.download-grid-row {
    display: grid;
    grid-template-columns: 90px repeat(4, 1fr);
}

.grid-cell {
    padding: 8px;
    text-align: center;
    font-size: 0.75rem;
    border-right: 1px solid rgba(255, 255, 255, 0.04);
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.grid-cell:last-child {
    border-right: none;
}

.grid-label {
    font-weight: 600;
    color: var(--text-secondary);
    text-align: left;
    padding-left: 12px;
}

.grid-header-cell {
    font-weight: 700;
    color: var(--accent-cyan);
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.dl-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-family: var(--font);
    font-size: 0.8rem;
    padding: 6px;
    border-radius: 4px;
    transition: var(--transition);
}

.dl-btn:hover {
    background: rgba(139, 92, 246, 0.15);
    color: var(--accent-violet);
}

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

/* Overlay Controls */
.overlay-controls {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.overlay-field {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.overlay-field label,
.overlay-check label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.overlay-field input {
    background: var(--bg-input);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    padding: 8px 12px;
    color: var(--text-primary);
    font-family: var(--font);
    font-size: 0.85rem;
    outline: none;
    transition: var(--transition);
}

.overlay-field input:focus {
    border-color: var(--accent-violet);
    box-shadow: 0 0 0 2px rgba(139, 92, 246, 0.15);
}

.overlay-check {
    display: flex;
    align-items: center;
    gap: 8px;
}

.overlay-check input[type="checkbox"] {
    accent-color: var(--accent-violet);
    width: 16px;
    height: 16px;
    cursor: pointer;
}

/* Advanced Panel */
.toggle-advanced {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-family: var(--font);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    padding: 12px 0;
    transition: var(--transition);
}

.toggle-advanced:hover {
    color: var(--text-primary);
}

.toggle-advanced svg {
    transition: var(--transition);
}

.toggle-advanced.open svg {
    transform: rotate(180deg);
}

.advanced-panel {
    margin-top: 12px;
}

.advanced-panel h4 {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 10px;
    margin-top: 16px;
}

.advanced-panel h4:first-child {
    margin-top: 0;
}

.preset-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
}

.preset-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: 14px 10px;
    background: var(--bg-input);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-family: var(--font);
    color: var(--text-primary);
    transition: var(--transition);
}

.preset-btn:hover {
    border-color: var(--accent-violet);
    background: rgba(139, 92, 246, 0.1);
}

.preset-btn.active {
    border-color: var(--accent-violet);
    background: rgba(139, 92, 246, 0.15);
    box-shadow: 0 0 12px rgba(139, 92, 246, 0.2);
}

.preset-name {
    font-size: 0.8rem;
    font-weight: 600;
}

.preset-dim {
    font-size: 0.7rem;
    color: var(--text-muted);
}

.custom-dims {
    display: flex;
    align-items: flex-end;
    gap: 10px;
    flex-wrap: wrap;
}

.dim-field {
    display: flex;
    flex-direction: column;
    gap: 4px;
    flex: 1;
    min-width: 80px;
}

.dim-field label {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.dim-field input,
.dim-field select,
.dim-format select {
    background: var(--bg-input);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    padding: 8px 10px;
    color: var(--text-primary);
    font-family: var(--font);
    font-size: 0.85rem;
    outline: none;
    transition: var(--transition);
}

.dim-field input:focus,
.dim-field select:focus,
.dim-format select:focus {
    border-color: var(--accent-violet);
}

.dim-x {
    font-size: 1.2rem;
    color: var(--text-muted);
    padding-bottom: 8px;
}

.dim-format {
    display: flex;
    flex-direction: column;
    gap: 4px;
    min-width: 80px;
}

.dim-format label {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* ─── Delete Section ──────────────────────────────────────── */
.delete-section {
    display: flex;
    justify-content: flex-end;
}

/* ═══════════════════════════════════════════════════════════
   UPLOAD PAGE STYLES
   ═══════════════════════════════════════════════════════════ */

/* ─── Upload Page Container ───────────────────────────────── */
.upload-container {
    max-width: 800px;
}

/* ─── Page Navigation Tabs ────────────────────────────────── */
.page-nav {
    display: flex;
    gap: 4px;
    margin-bottom: 24px;
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    padding: 4px;
    animation: fadeInUp 0.6s ease-out 0.05s backwards;
}

.nav-tab {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    flex: 1;
    padding: 10px 16px;
    border-radius: var(--radius-sm);
    color: var(--text-muted);
    text-decoration: none;
    font-family: var(--font);
    font-size: 0.85rem;
    font-weight: 600;
    transition: var(--transition);
    cursor: pointer;
}

.nav-tab:hover {
    color: var(--text-secondary);
    background: rgba(255, 255, 255, 0.03);
}

.nav-tab.active {
    color: var(--text-primary);
    background: rgba(139, 92, 246, 0.12);
    box-shadow: 0 0 12px rgba(139, 92, 246, 0.1);
}

.nav-tab.active svg {
    color: var(--accent-violet);
}

/* ─── Large Upload Area ───────────────────────────────────── */
.upload-page-section {
    min-height: 340px;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: fadeInUp 0.6s ease-out 0.1s backwards;
}

.upload-area-large {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 100%;
    padding: 60px 30px;
    border: 2px dashed var(--glass-border);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.upload-area-large::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 50% 50%, rgba(139, 92, 246, 0.04), transparent 70%);
    opacity: 0;
    transition: opacity 0.4s ease;
}

.upload-area-large:hover::before,
.upload-area-large.dragover::before {
    opacity: 1;
}

.upload-area-large:hover,
.upload-area-large.dragover {
    border-color: var(--accent-violet);
    background: rgba(139, 92, 246, 0.03);
    transform: scale(1.005);
}

.upload-area-large.dragover {
    border-color: var(--accent-cyan);
    background: rgba(6, 182, 212, 0.05);
    transform: scale(1.01);
}

.upload-icon-large {
    color: var(--text-muted);
    margin-bottom: 20px;
    transition: var(--transition);
    position: relative;
    z-index: 1;
}

.upload-area-large:hover .upload-icon-large {
    color: var(--accent-violet);
    transform: translateY(-8px);
}

.upload-area-large.dragover .upload-icon-large {
    color: var(--accent-cyan);
    transform: translateY(-12px) scale(1.1);
}

.upload-title {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 8px;
    position: relative;
    z-index: 1;
}

.upload-subtitle {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 20px;
    position: relative;
    z-index: 1;
}

/* ─── Format Badges ───────────────────────────────────────── */
.upload-formats {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    justify-content: center;
    position: relative;
    z-index: 1;
}

.format-badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    background: rgba(139, 92, 246, 0.1);
    color: var(--accent-violet);
    border: 1px solid rgba(139, 92, 246, 0.15);
    transition: var(--transition);
}

.format-badge:nth-child(2) {
    background: rgba(6, 182, 212, 0.1);
    color: var(--accent-cyan);
    border-color: rgba(6, 182, 212, 0.15);
}

.format-badge:nth-child(3) {
    background: rgba(236, 72, 153, 0.1);
    color: var(--accent-pink);
    border-color: rgba(236, 72, 153, 0.15);
}

.format-badge:nth-child(4) {
    background: rgba(16, 185, 129, 0.1);
    color: var(--accent-green);
    border-color: rgba(16, 185, 129, 0.15);
}

.format-badge:nth-child(5) {
    background: rgba(251, 191, 36, 0.1);
    color: #FBBf24;
    border-color: rgba(251, 191, 36, 0.15);
}

.format-badge:nth-child(6) {
    background: rgba(239, 68, 68, 0.1);
    color: var(--accent-red);
    border-color: rgba(239, 68, 68, 0.15);
}

/* ─── Upload Progress (Large/Circular) ────────────────────── */
.upload-progress-large {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
    padding: 40px;
    width: 100%;
}

.upload-progress-icon {
    position: relative;
    width: 80px;
    height: 80px;
}

.upload-spinner-svg {
    transform: rotate(-90deg);
    transition: stroke-dashoffset 0.3s ease;
}

.progress-percent {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
}

.progress-text-large {
    font-size: 0.95rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.progress-bar-large {
    width: 100%;
    max-width: 400px;
    height: 4px;
    background: var(--bg-input);
    border-radius: 2px;
    overflow: hidden;
}

.progress-fill-large {
    height: 100%;
    background: var(--gradient-primary);
    border-radius: 2px;
    width: 0%;
    transition: width 0.3s ease;
}

/* ─── Upload Success State ────────────────────────────────── */
.upload-success {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    padding: 40px;
    width: 100%;
    animation: fadeInUp 0.5s ease-out;
}

.success-icon {
    color: var(--accent-green);
    animation: successPop 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes successPop {
    0% { transform: scale(0); opacity: 0; }
    50% { transform: scale(1.2); }
    100% { transform: scale(1); opacity: 1; }
}

.success-title {
    font-size: 1.4rem;
    font-weight: 700;
    background: var(--gradient-success);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.success-text {
    font-size: 0.9rem;
    color: var(--text-muted);
}

.success-actions {
    display: flex;
    gap: 12px;
    margin-top: 8px;
    flex-wrap: wrap;
    justify-content: center;
}

/* ─── Recent Uploads Section ──────────────────────────────── */
.recent-uploads {
    margin-top: 24px;
    animation: fadeInUp 0.6s ease-out 0.15s backwards;
}

.recent-grid {
    display: flex;
    gap: 12px;
    margin-top: 12px;
    overflow-x: auto;
    padding-bottom: 8px;
}

.recent-item {
    flex-shrink: 0;
    width: 100px;
    text-align: center;
}

.recent-thumb {
    width: 100px;
    height: 100px;
    border-radius: var(--radius-sm);
    overflow: hidden;
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 6px;
}

.recent-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.pdf-icon-small {
    color: var(--accent-red);
    font-size: 0.9rem;
    font-weight: 700;
}

.recent-name {
    font-size: 0.7rem;
    color: var(--text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* ─── Responsive ──────────────────────────────────────────── */
@media (max-width: 640px) {
    .container {
        padding: 24px 16px;
    }

    .logo-text {
        font-size: 1.8rem;
    }

    .features {
        grid-template-columns: 1fr;
        gap: 12px;
    }

    .glass-card {
        padding: 24px 20px;
    }

    .vault-header {
        flex-direction: column;
    }

    .docs-grid {
        grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
    }

    .modal {
        padding: 20px;
    }

    .modal-preview {
        flex-direction: column;
        text-align: center;
    }

    .download-grid-header,
    .download-grid-row {
        grid-template-columns: 70px repeat(4, 1fr);
    }

    .preset-grid {
        grid-template-columns: 1fr;
    }

    .custom-dims {
        flex-direction: column;
        align-items: stretch;
    }

    .dim-x {
        text-align: center;
        padding: 0;
    }

    .input-group {
        flex-wrap: wrap;
    }

    .input-group .btn {
        width: 100%;
        justify-content: center;
        margin-top: 4px;
    }

    /* Upload page responsive */
    .upload-area-large {
        padding: 40px 20px;
    }

    .upload-title {
        font-size: 1.1rem;
    }

    .page-nav {
        flex-direction: row;
    }

    .nav-tab {
        font-size: 0.78rem;
        padding: 8px 12px;
    }

    .success-actions {
        flex-direction: column;
        width: 100%;
    }

    .success-actions .btn {
        width: 100%;
        justify-content: center;
    }
}

/* ─── Scrollbar ───────────────────────────────────────────── */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.2);
}

/* ─── Loading spinner ─────────────────────────────────────── */
.spinner {
    width: 18px;
    height: 18px;
    border: 2px solid rgba(255,255,255,0.2);
    border-top-color: #fff;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
    display: inline-block;
}