/* NetDynamic FileShare - Dark Purple Theme */
/* (c) NetDynamic.Net */

:root {
    --bg-primary: #080812;
    --bg-secondary: #0d0e1e;
    --bg-card: #111228;
    --bg-hover: #181a35;
    --bg-input: #0a0b1a;
    --border: #1e2048;
    --border-glow: #3b3d8f;
    --border-focus: #6366f1;
    --purple-50: #eef2ff;
    --purple-100: #e0e7ff;
    --purple-200: #c7d2fe;
    --purple-300: #a5b4fc;
    --purple-400: #818cf8;
    --purple-500: #6366f1;
    --purple-600: #4f46e5;
    --purple-700: #4338ca;
    --purple-800: #3730a3;
    --purple-900: #312e81;
    --cyan: #67e8f9;
    --cyan-dim: #22d3ee;
    --text-primary: #d4d4e8;
    --text-secondary: #8b8da8;
    --text-muted: #555775;
    --heading: #7dd3fc;
    --success: #10b981;
    --danger: #ef4444;
    --danger-hover: #dc2626;
    --warning: #f59e0b;
    --glow: rgba(99, 102, 241, 0.12);
    --glow-strong: rgba(99, 102, 241, 0.25);
    --border-glow-color: rgba(59, 61, 143, 0.5);
    --radius: 12px;
    --radius-sm: 8px;
}

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

body {
    font-family: 'Inter', -apple-system, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
}

.app-container {
    max-width: 900px;
    margin: 0 auto;
    padding: 24px 20px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0 32px;
    border-bottom: 1px solid var(--border);
    margin-bottom: 32px;
    flex-wrap: wrap;
    gap: 16px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 14px;
}

.logo-icon {
    width: 44px;
    height: 44px;
    background: linear-gradient(135deg, var(--purple-600), var(--purple-800));
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    box-shadow: 0 0 20px var(--glow-strong);
}

.logo-icon svg { width: 24px; height: 24px; }

.logo h1 {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    background: linear-gradient(135deg, var(--cyan), var(--purple-400));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.version {
    font-size: 0.7rem;
    color: var(--text-muted);
    font-weight: 500;
}

/* Admin Nav */
.admin-nav { display: flex; gap: 4px; }

.nav-btn {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-secondary);
    padding: 8px 18px;
    border-radius: 999px;
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 500;
    transition: all 0.2s;
    font-family: inherit;
}

.nav-btn:hover { background: var(--bg-hover); color: var(--text-primary); }
.nav-btn.active {
    background: var(--purple-700);
    border-color: var(--purple-600);
    color: white;
    box-shadow: 0 0 12px var(--glow);
}

/* Main */
main { flex: 1; }

.tab-content { display: none; }
.tab-content.active { display: block; animation: fadeIn 0.2s ease; }

@keyframes fadeIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
}

.section-header h2 { font-size: 1.15rem; font-weight: 600; color: var(--heading); }

.badge {
    background: var(--purple-700);
    color: white;
    padding: 2px 10px;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 600;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-family: inherit;
    font-size: 0.875rem;
    font-weight: 600;
    transition: all 0.2s;
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--purple-600), var(--purple-700));
    color: white;
    box-shadow: 0 2px 12px var(--glow);
}
.btn-primary:hover {
    background: linear-gradient(135deg, var(--purple-500), var(--purple-600));
    box-shadow: 0 4px 20px var(--glow-strong);
    transform: translateY(-1px);
}
.btn-primary:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

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

.btn-danger { background: var(--danger); color: white; }
.btn-danger:hover { background: var(--danger-hover); }

.btn-sm { padding: 6px 14px; font-size: 0.8rem; }
.btn-lg { padding: 14px 28px; font-size: 0.95rem; }

.btn-icon {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 4px;
    border-radius: 6px;
    transition: all 0.2s;
}
.btn-icon:hover { color: var(--danger); background: rgba(239,68,68,0.1); }

/* Inputs */
.input {
    width: 100%;
    padding: 10px 14px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.9rem;
    transition: border-color 0.2s, box-shadow 0.2s;
    outline: none;
}

.input:focus {
    border-color: var(--purple-500);
    box-shadow: 0 0 0 3px var(--glow);
}

.input-sm { padding: 6px 10px; font-size: 0.8rem; }

textarea.input { resize: vertical; }

/* Form */
.form-group {
    margin-bottom: 18px;
}

.form-group label {
    display: block;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 6px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.settings-form h3 {
    margin: 28px 0 16px;
    font-size: 1rem;
    color: var(--heading);
    border-top: 1px solid var(--border);
    padding-top: 20px;
}

.settings-form h2 {
    color: var(--heading);
    margin-bottom: 20px;
}

/* Toggle switch */
.toggle-label {
    display: flex !important;
    align-items: center;
    gap: 12px;
    cursor: pointer;
    text-transform: none !important;
    font-size: 0.9rem !important;
    letter-spacing: 0 !important;
}

.toggle-label input { display: none; }

.toggle-switch {
    width: 44px;
    height: 24px;
    background: var(--border);
    border-radius: 999px;
    position: relative;
    transition: background 0.2s;
    flex-shrink: 0;
}

.toggle-switch::after {
    content: '';
    position: absolute;
    width: 18px;
    height: 18px;
    background: white;
    border-radius: 50%;
    top: 3px;
    left: 3px;
    transition: transform 0.2s;
}

.toggle-label input:checked + .toggle-switch {
    background: var(--purple-600);
}

.toggle-label input:checked + .toggle-switch::after {
    transform: translateX(20px);
}

/* IP Notice */
.ip-notice {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 16px;
    background: rgba(245, 158, 11, 0.08);
    border: 1px solid rgba(245, 158, 11, 0.2);
    border-radius: var(--radius-sm);
    margin-bottom: 24px;
    color: var(--warning);
    font-size: 0.85rem;
}

/* Upload Zone */
.upload-zone {
    margin-bottom: 24px;
}

.upload-zone-inner {
    border: 2px dashed var(--border);
    border-radius: var(--radius);
    padding: 60px 40px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s;
    background: var(--bg-secondary);
}

.upload-zone-inner:hover, .upload-zone-inner.drag-over {
    border-color: var(--purple-500);
    background: rgba(139, 92, 246, 0.05);
    box-shadow: 0 0 30px var(--glow);
}

.upload-icon {
    color: var(--purple-400);
    margin-bottom: 16px;
    opacity: 0.7;
}

.upload-zone-inner h2 {
    font-size: 1.25rem;
    margin-bottom: 4px;
    font-weight: 600;
    color: var(--heading);
}

.upload-zone-inner p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.upload-hint {
    margin-top: 12px;
    font-size: 0.8rem !important;
    color: var(--text-muted) !important;
}

/* File Selected */
.file-selected {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
}

.selected-file-info {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 20px;
}

.file-icon-large { color: var(--purple-400); flex-shrink: 0; }
.selected-file-info > div:nth-child(2) { flex: 1; }
.file-name { font-weight: 600; font-size: 1rem; }
.file-size { color: var(--text-secondary); font-size: 0.85rem; }

/* Progress */
.progress-bar {
    height: 6px;
    background: var(--border);
    border-radius: 999px;
    overflow: hidden;
    margin-bottom: 12px;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--purple-600), var(--purple-400));
    border-radius: 999px;
    width: 0;
    transition: width 0.3s;
    box-shadow: 0 0 10px var(--glow-strong);
}

.progress-text {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.85rem;
}

/* Upload Result */
.upload-result {
    text-align: center;
    padding: 40px 0;
}

.result-icon {
    color: var(--success);
    margin-bottom: 16px;
}

.upload-result h2 {
    font-size: 1.3rem;
    margin-bottom: 8px;
    font-weight: 700;
    color: var(--heading);
}

.result-filename {
    color: var(--text-secondary);
    margin-bottom: 24px;
    font-size: 0.9rem;
}

.share-link-box {
    display: flex;
    gap: 8px;
    max-width: 560px;
    margin: 0 auto 12px;
}

.share-link-box .input {
    text-align: center;
    font-size: 0.85rem;
    color: var(--purple-300);
}

.copy-feedback {
    color: var(--success);
    font-size: 0.85rem;
    margin-bottom: 16px;
}

.error-text { color: var(--danger); font-size: 0.85rem; margin-top: 8px; }

/* Key gate */
.key-input-section {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px;
    text-align: center;
    margin-bottom: 24px;
}

.key-input-section h3 { margin-bottom: 8px; color: var(--heading); }
.key-input-section p { color: var(--text-secondary); font-size: 0.9rem; margin-bottom: 20px; }

.key-input-row {
    display: flex;
    gap: 8px;
    max-width: 400px;
    margin: 0 auto;
}

/* File Cards (Admin) */
.files-grid { display: flex; flex-direction: column; gap: 12px; }

.file-card {
    background: var(--bg-card);
    border: 1px solid var(--border-glow);
    border-radius: var(--radius);
    padding: 18px;
    transition: all 0.2s;
    box-shadow: 0 0 8px var(--border-glow-color);
}

.file-card:hover {
    border-color: var(--purple-500);
    box-shadow: 0 0 16px var(--glow-strong);
}

.file-card-highlight {
    border-color: var(--cyan-dim);
    box-shadow: 0 0 16px rgba(34, 211, 238, 0.2);
}

.file-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}

.file-card-name { font-weight: 600; font-size: 0.95rem; color: var(--heading); }
.file-card-size { color: var(--text-muted); font-size: 0.8rem; }

.file-card-meta {
    display: flex;
    gap: 16px;
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 8px;
}

.file-card-uploader {
    font-size: 0.8rem;
    color: var(--cyan);
    margin-bottom: 8px;
    font-weight: 500;
}

.file-card-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 10px;
}

.file-card-link {
    margin-bottom: 12px;
}

.file-card-actions {
    display: flex;
    gap: 8px;
}

/* Key Cards (Admin) */
.keys-grid { display: flex; flex-direction: column; gap: 8px; }

.key-card {
    background: var(--bg-card);
    border: 1px solid var(--border-glow);
    border-radius: var(--radius-sm);
    padding: 14px 18px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 0 6px var(--border-glow-color);
}

.key-card-info { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.key-label { font-weight: 600; font-size: 0.9rem; }
.key-value {
    background: var(--bg-input);
    padding: 3px 10px;
    border-radius: 6px;
    font-size: 0.8rem;
    color: var(--cyan);
    border: 1px solid var(--border);
}
.key-date { font-size: 0.75rem; color: var(--text-muted); }

/* Empty state */
.empty-state {
    text-align: center;
    padding: 48px 20px;
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* Toast */
.toast {
    position: fixed;
    bottom: 24px;
    right: 24px;
    background: var(--purple-700);
    color: white;
    padding: 12px 24px;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 500;
    opacity: 0;
    transform: translateY(10px);
    transition: all 0.3s;
    z-index: 1000;
    box-shadow: 0 4px 20px var(--glow-strong);
}

.toast.show { opacity: 1; transform: translateY(0); }
.toast-error { background: var(--danger); }

/* Footer */
footer {
    margin-top: auto;
    padding-top: 32px;
    text-align: center;
    font-size: 0.75rem;
    color: var(--text-muted);
}

footer a { color: var(--purple-400); text-decoration: none; }
footer a:hover { text-decoration: underline; }

/* Scrollbar */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 999px; }
::-webkit-scrollbar-thumb:hover { background: var(--purple-700); }

/* Key groups (files by uploader) */
.key-group {
    background: var(--bg-card);
    border: 1px solid var(--border-glow);
    border-radius: var(--radius);
    margin-bottom: 12px;
    overflow: hidden;
    box-shadow: 0 0 8px var(--border-glow-color);
}

.key-group-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    cursor: pointer;
    transition: background 0.2s;
    user-select: none;
}

.key-group-header:hover { background: var(--bg-hover); }

.key-group-info {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}

.key-group-name {
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--heading);
}

.key-group-stats {
    display: flex;
    align-items: center;
    gap: 14px;
    font-size: 0.8rem;
    color: var(--text-muted);
}

.key-group-arrow {
    transition: transform 0.2s;
}

.key-group.collapsed .key-group-arrow {
    transform: rotate(-90deg);
}

.key-group-files {
    border-top: 1px solid var(--border);
    transition: max-height 0.3s ease;
}

.key-group.collapsed .key-group-files {
    display: none;
}

.file-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 20px;
    border-bottom: 1px solid var(--border);
    transition: background 0.2s;
}

.file-row:last-child { border-bottom: none; }
.file-row:hover { background: var(--bg-hover); }

.file-row-info { flex: 1; min-width: 0; }

.file-row-name {
    display: block;
    font-weight: 500;
    font-size: 0.9rem;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.file-row-meta {
    display: block;
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 2px;
}

.file-row-desc {
    display: block;
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: 2px;
}

.file-row-actions {
    display: flex;
    gap: 6px;
    margin-left: 12px;
    flex-shrink: 0;
}

/* Key actions row */
.key-card-actions {
    display: flex;
    gap: 6px;
    align-items: center;
}

.key-email-badge {
    font-size: 0.7rem;
    color: var(--text-muted);
    background: var(--bg-input);
    padding: 2px 8px;
    border-radius: 4px;
    border: 1px solid var(--border);
}

/* File selected card glow */
.file-selected {
    box-shadow: 0 0 12px var(--border-glow-color);
    border-color: var(--border-glow);
}

/* Upload zone glow */
.upload-zone-inner {
    border-color: var(--border-glow);
}

.share-link-box .input {
    color: var(--cyan);
}

.key-label { color: var(--heading); }

/* Modal overlay */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    backdrop-filter: blur(4px);
}

.modal {
    background: var(--bg-card);
    border: 1px solid var(--border-glow);
    border-radius: var(--radius);
    padding: 28px;
    width: 90%;
    max-width: 440px;
    box-shadow: 0 0 30px var(--glow-strong);
}

.modal h3 {
    color: var(--heading);
    margin-bottom: 16px;
    font-size: 1.1rem;
}

.modal-actions {
    display: flex;
    gap: 8px;
    justify-content: flex-end;
    margin-top: 20px;
}

/* Responsive */
@media (max-width: 640px) {
    header { flex-direction: column; align-items: flex-start; }
    .admin-nav { width: 100%; overflow-x: auto; }
    .share-link-box { flex-direction: column; }
    .key-card { flex-direction: column; align-items: flex-start; gap: 10px; }
    .key-card-info { flex-direction: column; gap: 6px; }
    .file-card-actions { flex-wrap: wrap; }
}