/* TaskFlow — Core Styles */

/* Light theme */
[data-theme="light"] {
    --bg: #F5F5F7;
    --surface: #FFFFFF;
    --surface2: #F0F0F2;
    --border: rgba(0,0,0,0.08);
    --accent: #7C6FE0;
    --accent2: #0D9488;
    --text: #1A1B26;
    --muted: #6B7280;
    --danger: #DC2626;
    --success: #059669;
    --warning: #D97706;
    --info: #2563EB;
}
[data-theme="light"] .sidebar { background: #FFFFFF; }
[data-theme="light"] .topbar { background: #FFFFFF; }
[data-theme="light"] .brand-name { background: linear-gradient(135deg, #1A1B26 30%, var(--accent)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
[data-theme="light"] .nav-item:hover, [data-theme="light"] .nav-item.active { background: rgba(124,111,224,0.08); }
[data-theme="light"] .form-control { background: #F5F5F7; }
[data-theme="light"] .flash { -webkit-backdrop-filter: blur(8px); backdrop-filter: blur(8px); }
[data-theme="light"] ::-webkit-scrollbar-thumb { background: rgba(0,0,0,0.12); }
[data-theme="light"] ::-webkit-scrollbar-thumb:hover { background: rgba(0,0,0,0.2); }

/* Dark theme (default) */
:root {
    --bg: #0D0E14;
    --surface: #13141C;
    --surface2: #1A1B26;
    --border: rgba(255,255,255,0.07);
    --accent: #7C6FE0;
    --accent2: #5EEAD4;
    --text: #E2E4F0;
    --muted: #6B7280;
    --danger: #F87171;
    --success: #34D399;
    --warning: #FBBF24;
    --info: #60A5FA;
    --radius: 10px;
    --sidebar-width: 260px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: 'DM Sans', sans-serif; background: var(--bg); color: var(--text); min-height: 100vh; font-size: 14px; }
h1, h2, h3, h4, .brand { font-family: 'Syne', sans-serif; }
a { color: inherit; text-decoration: none; }

/* Layout */
.app-layout { display: flex; min-height: 100vh; }

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background: var(--surface);
    border-right: 1px solid var(--border);
    display: flex; flex-direction: column;
    position: fixed; top: 0; left: 0; bottom: 0;
    z-index: 100; overflow-y: auto;
}
.sidebar-brand { padding: 20px 20px 16px; border-bottom: 1px solid var(--border); display: flex; align-items: center; gap: 10px; }
.brand-icon { width: 32px; height: 32px; background: linear-gradient(135deg, var(--accent), var(--accent2)); border-radius: 8px; display: flex; align-items: center; justify-content: center; font-size: 16px; }
.brand-name { font-size: 18px; font-weight: 700; background: linear-gradient(135deg, #fff 30%, var(--accent2)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.sidebar-section { padding: 16px 12px 8px; }
.sidebar-label { font-size: 10px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.1em; color: var(--muted); padding: 0 8px; margin-bottom: 4px; }
.nav-item { display: flex; align-items: center; gap: 10px; padding: 8px 10px; border-radius: 8px; color: var(--muted); font-weight: 500; transition: all 0.15s; cursor: pointer; }
.nav-item:hover, .nav-item.active { background: rgba(124, 111, 224, 0.12); color: var(--text); }
.nav-item.active { color: var(--accent); }
.nav-icon { font-size: 16px; width: 20px; text-align: center; }
.workspace-item { display: flex; align-items: center; gap: 10px; padding: 7px 10px; border-radius: 8px; color: var(--muted); font-weight: 500; font-size: 13px; transition: all 0.15s; }
.workspace-item:hover { background: rgba(255,255,255,0.04); color: var(--text); }
.ws-dot { width: 24px; height: 24px; border-radius: 6px; display: flex; align-items: center; justify-content: center; font-size: 13px; flex-shrink: 0; }
.sidebar-footer { margin-top: auto; padding: 12px; border-top: 1px solid var(--border); }
.user-card { display: flex; align-items: center; gap: 10px; padding: 8px 10px; border-radius: 8px; cursor: pointer; transition: background 0.15s; }
.user-card:hover { background: rgba(255,255,255,0.05); }

/* Avatars */
.avatar { width: 32px; height: 32px; border-radius: 8px; display: flex; align-items: center; justify-content: center; font-size: 12px; font-weight: 700; flex-shrink: 0; color: #fff; }
.avatar-sm { width: 24px; height: 24px; border-radius: 6px; font-size: 10px; }

/* Main content */
.main-content { margin-left: var(--sidebar-width); flex: 1; display: flex; flex-direction: column; min-height: 100vh; }
.topbar { padding: 14px 28px; border-bottom: 1px solid var(--border); display: flex; align-items: center; justify-content: space-between; background: var(--surface); position: sticky; top: 0; z-index: 50; }
.page-title { font-size: 16px; font-weight: 600; }
.content { padding: 28px; flex: 1; }

/* Buttons */
.btn { display: inline-flex; align-items: center; gap: 6px; padding: 8px 16px; border-radius: 8px; font-size: 13px; font-weight: 500; font-family: 'DM Sans', sans-serif; cursor: pointer; border: none; transition: all 0.15s; white-space: nowrap; }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: #6A5ECC; }
.btn-ghost { background: transparent; color: var(--muted); border: 1px solid var(--border); }
.btn-ghost:hover { background: rgba(255,255,255,0.05); color: var(--text); }
.btn-danger { background: rgba(248,113,113,0.15); color: var(--danger); border: 1px solid rgba(248,113,113,0.2); }
.btn-danger:hover { background: rgba(248,113,113,0.25); }
.btn-sm { padding: 5px 10px; font-size: 12px; }

/* Cards */
.card { background: var(--surface2); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; }

/* Forms */
.form-group { margin-bottom: 16px; }
.form-label { display: block; font-size: 12px; font-weight: 500; color: var(--muted); margin-bottom: 6px; text-transform: uppercase; letter-spacing: 0.05em; }
.form-control { width: 100%; background: var(--surface); border: 1px solid var(--border); border-radius: 8px; padding: 9px 12px; color: var(--text); font-family: 'DM Sans', sans-serif; font-size: 14px; transition: border-color 0.15s; outline: none; }
.form-control:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(124, 111, 224, 0.12); }
textarea.form-control { resize: vertical; min-height: 80px; }
select.form-control { cursor: pointer; }

/* Badges */
.badge { display: inline-flex; align-items: center; gap: 4px; padding: 3px 8px; border-radius: 20px; font-size: 11px; font-weight: 600; }
.badge-todo { background: rgba(107,114,128,0.2); color: #9CA3AF; }
.badge-in_progress { background: rgba(59,130,246,0.2); color: #60A5FA; }
.badge-review { background: rgba(245,158,11,0.2); color: #FBBF24; }
.badge-done { background: rgba(16,185,129,0.2); color: #34D399; }
.badge-cancelled { background: rgba(239,68,68,0.15); color: #F87171; }
.badge-urgent { background: rgba(239,68,68,0.2); color: #F87171; }
.badge-high { background: rgba(251,191,36,0.2); color: #FBBF24; }
.badge-normal { background: rgba(96,165,250,0.2); color: #60A5FA; }
.badge-low { background: rgba(110,231,183,0.2); color: #6EE7B7; }
.badge-none { background: rgba(156,163,175,0.2); color: #9CA3AF; }

/* Flash messages */
.flash-messages { position: fixed; top: 20px; right: 20px; z-index: 1000; display: flex; flex-direction: column; gap: 8px; }
.flash { padding: 12px 16px; border-radius: 8px; font-size: 13px; font-weight: 500; min-width: 280px; display: flex; align-items: center; justify-content: space-between; gap: 12px; animation: slideIn 0.2s ease; }
.flash-success { background: rgba(52,211,153,0.15); border: 1px solid rgba(52,211,153,0.3); color: #34D399; }
.flash-error { background: rgba(248,113,113,0.15); border: 1px solid rgba(248,113,113,0.3); color: #F87171; }
.flash-info { background: rgba(96,165,250,0.15); border: 1px solid rgba(96,165,250,0.3); color: #60A5FA; }
.flash-close { cursor: pointer; opacity: 0.6; }
.flash-close:hover { opacity: 1; }
@keyframes slideIn { from { transform: translateX(20px); opacity: 0; } to { transform: translateX(0); opacity: 1; } }

/* Progress */
.progress-bar { height: 4px; background: var(--border); border-radius: 2px; overflow: hidden; }
.progress-fill { height: 100%; background: linear-gradient(90deg, var(--accent), var(--accent2)); border-radius: 2px; transition: width 0.3s ease; }

/* Utilities */
.divider { border: none; border-top: 1px solid var(--border); margin: 16px 0; }
.empty-state { text-align: center; padding: 60px 20px; color: var(--muted); }
.empty-icon { font-size: 48px; margin-bottom: 12px; }
.empty-title { font-size: 16px; font-weight: 600; color: var(--text); margin-bottom: 8px; }
.empty-desc { font-size: 13px; margin-bottom: 20px; }

.flex { display: flex; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: 8px; }
.gap-3 { gap: 12px; }
.gap-4 { gap: 16px; }
.mt-2 { margin-top: 8px; }
.mt-4 { margin-top: 16px; }
.mt-6 { margin-top: 24px; }
.text-muted { color: var(--muted); }
.text-sm { font-size: 12px; }
.font-semibold { font-weight: 600; }
.truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* Hamburger */
.hamburger { display: none; background: none; border: none; color: var(--text); font-size: 22px; cursor: pointer; padding: 4px 8px; border-radius: 6px; transition: background 0.15s; }
.hamburger:hover { background: rgba(255,255,255,0.05); }

/* Sidebar overlay for mobile */
.sidebar-overlay { display: none; position: fixed; inset: 0; background: rgba(0,0,0,0.6); z-index: 99; }
.sidebar-overlay.active { display: block; }

/* Search modal */
.search-overlay { display: none; position: fixed; inset: 0; background: rgba(0,0,0,0.6); z-index: 200; align-items: flex-start; justify-content: center; padding-top: 12vh; }
.search-overlay.active { display: flex; }
.search-box { width: 100%; max-width: 580px; background: var(--surface); border: 1px solid var(--border); border-radius: 14px; overflow: hidden; box-shadow: 0 20px 60px rgba(0,0,0,0.5); }
.search-input { width: 100%; background: transparent; border: none; padding: 16px 20px; color: var(--text); font-family: 'DM Sans', sans-serif; font-size: 16px; outline: none; }
.search-input::placeholder { color: var(--muted); }
.search-results { max-height: 360px; overflow-y: auto; border-top: 1px solid var(--border); }
.search-result { display: flex; align-items: center; gap: 12px; padding: 10px 20px; cursor: pointer; transition: background 0.1s; font-size: 13px; }
.search-result:hover, .search-result.active { background: rgba(124,111,224,0.12); }
.search-result-type { font-size: 10px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.05em; color: var(--muted); width: 50px; flex-shrink: 0; }
.search-result-title { flex: 1; min-width: 0; font-weight: 500; }
.search-result-extra { color: var(--muted); font-size: 11px; }
.search-empty { padding: 24px 20px; text-align: center; color: var(--muted); font-size: 13px; }
.search-hint { padding: 10px 20px; border-top: 1px solid var(--border); font-size: 11px; color: var(--muted); display: flex; align-items: center; gap: 12px; }
.search-hint kbd { background: var(--surface2); border: 1px solid var(--border); border-radius: 4px; padding: 1px 6px; font-size: 11px; font-family: 'DM Sans', sans-serif; }

/* Toast */
.toast-container { position: fixed; top: 20px; right: 20px; z-index: 1000; display: flex; flex-direction: column; gap: 8px; pointer-events: none; }
.toast { pointer-events: auto; padding: 12px 16px; border-radius: 8px; font-size: 13px; font-weight: 500; min-width: 280px; max-width: 400px; display: flex; align-items: center; justify-content: space-between; gap: 12px; animation: slideIn 0.2s ease; }
.toast-success { background: rgba(52,211,153,0.15); border: 1px solid rgba(52,211,153,0.3); color: #34D399; }
.toast-error { background: rgba(248,113,113,0.15); border: 1px solid rgba(248,113,113,0.3); color: #F87171; }
.toast-info { background: rgba(96,165,250,0.15); border: 1px solid rgba(96,165,250,0.3); color: #60A5FA; }
@keyframes fadeOut { from { opacity: 1; transform: translateX(0); } to { opacity: 0; transform: translateX(20px); } }

/* Filter bar */
.filter-bar { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; margin-bottom: 20px; padding: 10px 14px; background: var(--surface2); border: 1px solid var(--border); border-radius: var(--radius); }
.filter-select { background: var(--surface); border: 1px solid var(--border); border-radius: 6px; padding: 5px 10px; color: var(--text); font-family: 'DM Sans', sans-serif; font-size: 12px; cursor: pointer; outline: none; min-width: 100px; }
.filter-select:focus { border-color: var(--accent); }
.filter-label { font-size: 11px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.04em; color: var(--muted); }
.filter-divider { width: 1px; height: 20px; background: var(--border); }
.filter-clear { font-size: 12px; color: var(--muted); cursor: pointer; padding: 4px 8px; border-radius: 4px; transition: all 0.15s; border: none; background: none; }
.filter-clear:hover { color: var(--text); background: rgba(255,255,255,0.05); }

/* Quick add */
.quick-add { display: flex; align-items: center; gap: 8px; padding: 8px 12px; margin-top: 4px; }
.quick-add-input { flex: 1; background: transparent; border: none; border-bottom: 1px solid var(--border); padding: 6px 0; color: var(--text); font-family: 'DM Sans', sans-serif; font-size: 13px; outline: none; transition: border-color 0.15s; }
.quick-add-input:focus { border-color: var(--accent); }
.quick-add-input::placeholder { color: var(--muted); }

/* Drag and drop */
.sortable-ghost { opacity: 0.4; }
.sortable-chosen { box-shadow: 0 4px 20px rgba(124,111,224,0.3); }
.sortable-drag { opacity: 0.9; }
.board-task[draggable="true"] { cursor: grab; }
.board-task[draggable="true"]:active { cursor: grabbing; }

/* Tags */
.tag { display: inline-flex; align-items: center; gap: 4px; padding: 2px 8px; border-radius: 4px; font-size: 11px; font-weight: 500; }
.tag-dot { width: 6px; height: 6px; border-radius: 50%; flex-shrink: 0; }
.tag-list { display: flex; flex-wrap: wrap; gap: 4px; }
.tag-removable { cursor: pointer; transition: opacity 0.15s; }
.tag-removable:hover { opacity: 0.7; }
.tag-picker { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 8px; }
.tag-option { display: flex; align-items: center; gap: 6px; padding: 4px 10px; border: 1px solid var(--border); border-radius: 6px; font-size: 12px; cursor: pointer; transition: all 0.15s; }
.tag-option:hover { border-color: rgba(124,111,224,0.3); }
.tag-option.selected { border-color: var(--accent); background: rgba(124,111,224,0.12); }

/* Keyboard shortcut hint */
.shortcut-hint { font-size: 11px; color: var(--muted); display: flex; align-items: center; gap: 4px; }
.shortcut-hint kbd { background: var(--surface2); border: 1px solid var(--border); border-radius: 4px; padding: 1px 6px; font-size: 10px; font-family: 'DM Sans', sans-serif; }

/* Markdown content */
.markdown-content h1 { font-size: 20px; margin: 16px 0 8px; }
.markdown-content h2 { font-size: 17px; margin: 14px 0 6px; }
.markdown-content h3 { font-size: 15px; margin: 12px 0 4px; }
.markdown-content p { margin-bottom: 8px; }
.markdown-content ul, .markdown-content ol { padding-left: 20px; margin-bottom: 8px; }
.markdown-content li { margin-bottom: 4px; }
.markdown-content code { background: var(--surface); padding: 2px 6px; border-radius: 4px; font-size: 0.9em; font-family: 'Consolas', 'Monaco', monospace; }
.markdown-content pre { background: var(--surface); border: 1px solid var(--border); border-radius: 8px; padding: 12px; margin: 8px 0; overflow-x: auto; }
.markdown-content pre code { background: none; padding: 0; }
.markdown-content blockquote { border-left: 3px solid var(--accent); padding-left: 12px; margin: 8px 0; color: var(--muted); }
.markdown-content a { color: var(--accent); text-decoration: underline; }
.markdown-content hr { border: none; border-top: 1px solid var(--border); margin: 12px 0; }
.markdown-content strong { font-weight: 600; }

/* Bulk toolbar */
.bulk-check { width: 14px; height: 14px; flex-shrink: 0; }

/* Scrollbar */
::-webkit-scrollbar { width: 5px; height: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.1); border-radius: 10px; }
::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,0.2); }

/* ==================== RESPONSIVE ==================== */

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
        transition: transform 0.25s ease;
        box-shadow: none;
    }
    .sidebar.open {
        transform: translateX(0);
        box-shadow: 4px 0 30px rgba(0,0,0,0.5);
    }
    .hamburger { display: block; }
    .main-content { margin-left: 0; }
    .topbar { padding: 12px 16px; }
    .content { padding: 16px; }

    /* Stack grids */
    .stats-grid { grid-template-columns: repeat(2, 1fr) !important; }
    .two-col { grid-template-columns: 1fr !important; }
    .ws-grid { grid-template-columns: 1fr !important; }
    .project-grid { grid-template-columns: 1fr !important; }
    .detail-layout { grid-template-columns: 1fr !important; }
    .form-row { grid-template-columns: 1fr !important; }

    /* Auth pages */
    .auth-page { grid-template-columns: 1fr !important; }
    .auth-hero { display: none !important; }

    /* Board horizontal scroll */
    .board-cols { padding-bottom: 16px; }
    .board-col { min-width: 240px; }

    /* Calendar */
    .cal-cell { min-height: 60px; padding: 4px; }
    .cal-task { font-size: 10px; padding: 2px 4px; }

    /* Filter bar */
    .filter-bar { flex-direction: column; align-items: stretch; }
    .filter-divider { display: none; }

    /* Search */
    .search-overlay { padding-top: 5vh; padding-left: 12px; padding-right: 12px; }
}

@media (max-width: 480px) {
    .stats-grid { grid-template-columns: 1fr !important; }
    .topbar .flex { gap: 6px; }
    .btn-sm { padding: 4px 8px; font-size: 11px; }
}