/* TuTu Cloud — GitHub Dark Theme v2 */
:root {
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-tertiary: #21262d;
    --bg-hover: #30363d;
    --border-color: #30363d;
    --text-primary: #e6edf3;
    --text-secondary: #8b949e;
    --text-muted: #6e7681;
    --accent: #58a6ff;
    --accent-hover: #79c0ff;
    --danger: #f85149;
    --danger-hover: #ff6e63;
    --success: #3fb950;
    --warning: #d29922;
    --folder-color: #58a6ff;
    --file-color: #8b949e;
    --radius: 8px;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
}

/* ============ LOGO ============ */
.logo-icon {
    font-size: 22px;
    margin-right: 6px;
    line-height: 1;
}
.logo-icon-lg {
    font-size: 48px;
    display: block;
    margin-bottom: 8px;
    line-height: 1;
}
.logo-text {
    display: inline;
}
.header-left {
    display: flex;
    align-items: center;
}

/* ============ BUTTONS ============ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 8px 18px;
    font-size: 14px;
    font-weight: 500;
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
    background: var(--bg-tertiary);
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.15s;
    white-space: nowrap;
}
.btn:hover { background: var(--bg-hover); }
.btn:active { transform: scale(0.97); }

.btn-accent {
    background: var(--accent);
    border-color: var(--accent);
    color: #fff;
    font-weight: 600;
}
.btn-accent:hover { background: var(--accent-hover); border-color: var(--accent-hover); }

.btn-danger {
    background: var(--danger);
    border-color: var(--danger);
    color: #fff;
}
.btn-danger:hover { background: var(--danger-hover); }

.btn-ghost {
    background: transparent;
    border-color: var(--border-color);
    color: var(--text-secondary);
}
.btn-ghost:hover { color: var(--text-primary); background: var(--bg-tertiary); }

.btn-sm {
    padding: 4px 12px;
    font-size: 12px;
    border-radius: 6px;
}
.btn-sm.btn-danger { background: transparent; color: var(--danger); border-color: var(--border-color); }
.btn-sm.btn-danger:hover { background: rgba(248,81,73,0.15); border-color: var(--danger); }

.btn-full { width: 100%; }

.btn-cancel {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: 8px 18px;
    font-size: 14px;
    border-radius: var(--radius);
    cursor: pointer;
}
.btn-cancel:hover { background: var(--bg-hover); }

.btn-icon {
    background: none;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 6px 12px;
    border-radius: var(--radius);
    cursor: pointer;
    font-size: 16px;
    transition: all 0.15s;
}
.btn-icon:hover { background: var(--bg-tertiary); color: var(--text-primary); }
.btn-logout:hover { color: var(--danger); border-color: var(--danger); }

/* Language toggle */
.lang-toggle {
    font-size: 12px !important;
    padding: 3px 10px !important;
    font-weight: 600;
    letter-spacing: 0.5px;
    min-width: 36px;
    text-align: center;
}

.select {
    padding: 6px 12px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-primary);
    font-size: 14px;
}

/* ============ LOGIN ============ */
#login-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.7);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 5000;
}

.login-box {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 40px;
    text-align: center;
    width: 380px;
}
.login-logo { margin-bottom: 16px; }
.login-box h1 { font-size: 24px; margin-bottom: 4px; color: var(--accent); }
.login-box p { color: var(--text-secondary); margin-bottom: 24px; font-size: 14px; }
.login-box input {
    width: 100%; padding: 12px 16px; background: var(--bg-primary);
    border: 1px solid var(--border-color); border-radius: var(--radius);
    color: var(--text-primary); font-size: 14px; margin-bottom: 12px; outline: none;
}
.login-box input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(88,166,255,0.15); }
.login-error { color: var(--danger); font-size: 13px; margin-bottom: 12px; text-align: left; }

/* ============ HEADER ============ */
header, .landing-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 14px 24px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
}
header h1, .landing-header h1 { font-size: 18px; color: var(--accent); font-weight: 600; }
.header-right { display: flex; align-items: center; gap: 10px; }

#user-info {
    font-size: 13px;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 6px;
}
.user-name {
    font-weight: 600;
    color: var(--text-primary);
}
#stats-info { font-size: 13px; color: var(--text-secondary); }

/* Role badges */
.role-badge {
    display: inline-block; padding: 2px 10px; border-radius: 12px;
    font-size: 11px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.5px;
}
.role-badge.admin { background: rgba(210,153,34,0.15); color: var(--warning); border: 1px solid rgba(210,153,34,0.3); }
.role-badge.user { background: rgba(88,166,255,0.1); color: var(--accent); border: 1px solid rgba(88,166,255,0.2); }

/* ============ STORAGE BAR ============ */
.storage-bar-container {
    display: flex; align-items: center; gap: 12px;
    padding: 8px 24px; background: var(--bg-secondary); border-bottom: 1px solid var(--border-color);
}
.storage-bar { flex: 1; height: 4px; background: var(--bg-tertiary); border-radius: 2px; overflow: hidden; max-width: 200px; }
.storage-fill { height: 100%; background: var(--success); border-radius: 2px; transition: width 0.3s; width: 0%; }
.storage-fill.warning { background: var(--warning); }
.storage-fill.danger { background: var(--danger); }
.storage-text { font-size: 12px; color: var(--text-muted); white-space: nowrap; }

/* ============ TOOLBAR ============ */
.toolbar {
    display: flex; justify-content: space-between; align-items: center;
    padding: 12px 24px; border-bottom: 1px solid var(--border-color); background: var(--bg-secondary);
}
.toolbar-actions { display: flex; gap: 8px; }

.breadcrumb { display: flex; align-items: center; gap: 4px; font-size: 14px; flex-wrap: wrap; }
.breadcrumb a { color: var(--accent); text-decoration: none; cursor: pointer; }
.breadcrumb a:hover { text-decoration: underline; }
.breadcrumb .sep { color: var(--text-muted); margin: 0 2px; }
.breadcrumb .current { color: var(--text-primary); font-weight: 600; }

/* ============ UPLOAD PROGRESS ============ */
#upload-progress, #public-upload-progress {
    padding: 12px 24px; background: var(--bg-secondary); border-bottom: 1px solid var(--border-color);
    display: flex; align-items: center; gap: 12px;
}
.progress-bar { flex: 1; height: 6px; background: var(--bg-tertiary); border-radius: 3px; overflow: hidden; }
.progress-fill { height: 100%; background: var(--accent); border-radius: 3px; transition: width 0.3s; width: 0%; }
#progress-text, #public-progress-text { font-size: 13px; color: var(--text-secondary); white-space: nowrap; }

/* ============ FILE LIST ============ */
.file-list { padding: 0; }
.file-item {
    display: flex; align-items: center; padding: 12px 24px;
    border-bottom: 1px solid var(--border-color); cursor: pointer; transition: background 0.15s;
}
.file-item:hover { background: var(--bg-secondary); }
.file-icon { width: 36px; font-size: 22px; margin-right: 14px; text-align: center; flex-shrink: 0; }
.file-icon.folder { color: var(--folder-color); }
.file-icon.file { color: var(--file-color); }
.file-info { flex: 1; min-width: 0; }
.file-name { font-size: 14px; color: var(--text-primary); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.file-meta { font-size: 12px; color: var(--text-secondary); margin-top: 2px; }
.file-actions { display: flex; gap: 6px; opacity: 0; transition: opacity 0.15s; }
.file-item:hover .file-actions { opacity: 1; }

.loading, #empty-state, #public-empty-state {
    text-align: center; padding: 60px 24px; color: var(--text-secondary);
}

/* ============ CONTEXT MENU ============ */
.context-menu {
    position: fixed; background: var(--bg-secondary); border: 1px solid var(--border-color);
    border-radius: 10px; padding: 6px 0; min-width: 180px; box-shadow: 0 8px 24px rgba(0,0,0,0.4); z-index: 1000;
}
.menu-item { padding: 10px 18px; font-size: 14px; cursor: pointer; color: var(--text-primary); }
.menu-item:hover { background: var(--bg-tertiary); }
.menu-item.danger { color: var(--danger); }

/* ============ MODAL ============ */
.modal-overlay {
    position: fixed; top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.6); display: flex; justify-content: center; align-items: center; z-index: 2000;
}
.modal {
    background: var(--bg-secondary); border: 1px solid var(--border-color);
    border-radius: 16px; padding: 28px; min-width: 420px; max-width: 520px;
}
.modal h3 { margin-bottom: 16px; font-size: 17px; }
.modal h4 { color: var(--text-secondary); font-size: 13px; margin-bottom: 8px; margin-top: 12px; }
.modal input[type="text"], .modal input[type="password"] {
    width: 100%; padding: 10px 14px; background: var(--bg-primary);
    border: 1px solid var(--border-color); border-radius: var(--radius);
    color: var(--text-primary); font-size: 14px; margin-bottom: 10px; outline: none;
}
.modal input:focus { border-color: var(--accent); }

.modal-actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 20px; }
.modal-subtitle { margin-bottom: 8px; color: var(--text-secondary); font-size: 13px; }
.modal-hint { font-size: 12px; color: var(--text-muted); margin-top: 4px; }
.modal-row { display: flex; align-items: center; gap: 10px; margin-bottom: 10px; }
.modal-row label { font-size: 13px; color: var(--text-secondary); min-width: 50px; }

/* Settings */
.settings-section { margin-bottom: 20px; padding-bottom: 16px; border-bottom: 1px solid var(--border-color); }
.settings-section:last-child { border-bottom: none; margin-bottom: 0; padding-bottom: 0; }
.settings-row { display: flex; align-items: center; gap: 12px; margin-bottom: 10px; }
.settings-row label { font-size: 13px; color: var(--text-secondary); min-width: 120px; }
.settings-row input { flex: 1; }
.settings-input-row { display: flex; gap: 8px; flex: 1; }
.settings-input-row input { flex: 1; }

/* Share link */
.share-link {
    background: var(--bg-primary); border: 1px solid var(--border-color);
    border-radius: var(--radius); padding: 12px; font-size: 13px;
    word-break: break-all; color: var(--accent); margin: 8px 0; cursor: pointer; user-select: all;
}
.share-link:hover { background: var(--bg-tertiary); }

/* Drag & drop */
.drag-over::after {
    content: 'Drop files here';
    position: fixed; top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(88,166,255,0.1); border: 3px dashed var(--accent);
    display: flex; justify-content: center; align-items: center;
    font-size: 24px; color: var(--accent); z-index: 999; pointer-events: none;
}

/* Toast */
.toast {
    position: fixed; bottom: 24px; right: 24px;
    background: var(--bg-secondary); border: 1px solid var(--border-color);
    border-radius: 10px; padding: 14px 22px; font-size: 14px;
    box-shadow: 0 4px 16px rgba(0,0,0,0.4); z-index: 3000; animation: slideIn 0.3s ease;
}
.toast.success { border-left: 4px solid var(--success); }
.toast.error { border-left: 4px solid var(--danger); }
@keyframes slideIn { from { transform: translateX(100%); opacity: 0; } to { transform: translateX(0); opacity: 1; } }

/* ============ ADMIN PANEL ============ */
.admin-header {
    display: flex; justify-content: space-between; align-items: center;
    padding: 16px 24px; background: var(--bg-secondary); border-bottom: 1px solid var(--border-color);
}
.admin-header h2 { font-size: 17px; color: var(--text-primary); }

.stat-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 16px; padding: 20px 24px; }
.stat-card {
    background: var(--bg-secondary); border: 1px solid var(--border-color);
    border-radius: 12px; padding: 20px; text-align: center;
}
.stat-value { font-size: 32px; font-weight: 700; color: var(--accent); margin-bottom: 4px; }
.stat-label { font-size: 13px; color: var(--text-secondary); }

.admin-actions { display: flex; gap: 10px; padding: 14px 24px; border-bottom: 1px solid var(--border-color); }

.admin-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.admin-table thead { background: var(--bg-secondary); }
.admin-table th {
    padding: 12px 16px; text-align: left; color: var(--text-secondary);
    font-weight: 600; border-bottom: 1px solid var(--border-color);
    font-size: 12px; text-transform: uppercase; letter-spacing: 0.5px;
}
.admin-table td { padding: 14px 16px; border-bottom: 1px solid var(--border-color); vertical-align: middle; }
.admin-table tr:hover { background: var(--bg-secondary); }
.text-muted { color: var(--text-muted); font-size: 12px; }

.storage-mini { display: flex; flex-direction: column; gap: 4px; }
.storage-mini span { font-size: 11px; color: var(--text-secondary); }
.storage-mini-bar { width: 80px; height: 3px; background: var(--bg-tertiary); border-radius: 2px; overflow: hidden; }
.storage-mini-fill { height: 100%; background: var(--success); border-radius: 2px; }
.storage-mini-fill.warning { background: var(--warning); }
.storage-mini-fill.danger { background: var(--danger); }

.status-active { color: var(--success); font-size: 12px; font-weight: 500; }
.status-disabled { color: var(--danger); font-size: 12px; font-weight: 500; }
.action-cell { display: flex; gap: 4px; flex-wrap: wrap; }
.empty-msg { color: var(--text-secondary); padding: 24px; }

/* ============ RESPONSIVE ============ */
@media (max-width: 768px) {
    .toolbar { flex-direction: column; gap: 10px; padding: 12px 16px; }
    .file-item { padding: 12px 16px; }
    .file-actions { opacity: 1; }
    .modal { min-width: 90vw; }
    header, .landing-header { padding: 12px 16px; }
    .header-right { flex-wrap: wrap; gap: 6px; }
    .stat-cards { grid-template-columns: repeat(2, 1fr); gap: 10px; }
    .admin-table th, .admin-table td { padding: 10px 10px; }
    .storage-bar-container { padding: 8px 16px; }
    .login-box { width: 90vw; padding: 28px; }
    .btn { padding: 10px 18px; }
}