/* ============================================================
   TaskFlow Pro – Design System
   Modern Dark Theme with Glassmorphism
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

/* ── CSS Variables ── */
:root {
  /* Brand Colors */
  --primary: #6366f1;
  --primary-dark: #4f46e5;
  --primary-light: #818cf8;
  --primary-glow: rgba(99, 102, 241, 0.35);

  --accent: #22d3ee;
  --accent-dark: #0891b2;

  --success: #10b981;
  --success-bg: rgba(16, 185, 129, 0.15);
  --warning: #f59e0b;
  --warning-bg: rgba(245, 158, 11, 0.15);
  --danger: #ef4444;
  --danger-bg: rgba(239, 68, 68, 0.15);
  --info: #3b82f6;
  --info-bg: rgba(59, 130, 246, 0.15);

  /* Neutrals */
  --bg-base: #0a0a0f;
  --bg-surface: #111118;
  --bg-card: #16161f;
  --bg-card-hover: #1c1c28;
  --bg-input: #1e1e2e;
  --bg-modal: #12121c;

  --border: rgba(255,255,255,0.08);
  --border-strong: rgba(255,255,255,0.15);
  --border-focus: rgba(99, 102, 241, 0.5);

  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-disabled: #3f4a5a;

  /* Glass effect */
  --glass-bg: rgba(255,255,255,0.04);
  --glass-border: rgba(255,255,255,0.08);
  --glass-shadow: 0 8px 32px rgba(0,0,0,0.4);

  /* Radius */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.4);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.4);
  --shadow-lg: 0 8px 40px rgba(0,0,0,0.5);
  --shadow-glow: 0 0 30px var(--primary-glow);

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s ease;
  --transition-slow: 0.4s ease;

  /* Sidebar */
  --sidebar-width: 260px;
  --sidebar-collapsed: 72px;
  --topbar-height: 64px;
}

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

html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg-base);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

::selection { background: var(--primary-glow); color: var(--text-primary); }

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: var(--radius-full); }
::-webkit-scrollbar-thumb:hover { background: var(--primary); }

/* ══════════════════════════════════════════════
   AUTH PAGES (Login / Register)
══════════════════════════════════════════════ */

.auth-page {
  min-height: 100vh;
  display: flex;
  padding: 24px;
  position: relative;
  overflow-y: auto;
  overflow-x: hidden;
}

.auth-bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  background:
    radial-gradient(ellipse 80% 60% at 20% 20%, rgba(99,102,241,0.15) 0%, transparent 60%),
    radial-gradient(ellipse 60% 50% at 80% 80%, rgba(34,211,238,0.10) 0%, transparent 60%),
    var(--bg-base);
}

.auth-bg::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 1px 1px, rgba(255,255,255,0.04) 1px, transparent 0);
  background-size: 32px 32px;
}

.auth-card {
  margin: auto;
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 440px;
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  padding: 48px 40px;
  box-shadow: var(--glass-shadow);
  animation: slideUp 0.5s ease;
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(32px); }
  to   { opacity: 1; transform: translateY(0); }
}

.auth-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 32px;
}

.auth-logo-icon {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  box-shadow: 0 0 20px var(--primary-glow);
}

.auth-logo-text {
  font-size: 22px;
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary-light), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.auth-title {
  font-size: 28px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.auth-subtitle {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 32px;
}

.auth-tabs {
  display: flex;
  background: var(--bg-input);
  border-radius: var(--radius-md);
  padding: 4px;
  margin-bottom: 28px;
  gap: 4px;
}

.auth-tab {
  flex: 1;
  padding: 9px;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
  border-radius: calc(var(--radius-md) - 2px);
  cursor: pointer;
  transition: all var(--transition-normal);
  font-family: inherit;
}

.auth-tab.active {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 2px 10px var(--primary-glow);
}

/* ── Form Elements ── */
.form-group {
  margin-bottom: 18px;
  position: relative;
}

.form-label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 7px;
}

.form-control {
  width: 100%;
  padding: 12px 16px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 14px;
  font-family: inherit;
  transition: all var(--transition-fast);
  outline: none;
}

.form-control:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-glow);
}

.form-control::placeholder { color: var(--text-muted); }

.input-icon-wrap {
  position: relative;
}

.input-icon-wrap .form-control {
  padding-left: 42px;
}

.input-icon-wrap .icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 15px;
}

.input-icon-wrap .toggle-password {
  position: absolute;
  right: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  cursor: pointer;
  transition: color var(--transition-fast);
}

.input-icon-wrap .toggle-password:hover { color: var(--text-secondary); }

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 20px;
  border: none;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: all var(--transition-normal);
  text-decoration: none;
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}

.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0.1);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.btn:hover::after { opacity: 1; }
.btn:active { transform: scale(0.98); }

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  box-shadow: 0 4px 15px var(--primary-glow);
}

.btn-primary:hover {
  box-shadow: 0 6px 25px rgba(99,102,241,0.5);
  transform: translateY(-1px);
}

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

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

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

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

.btn-success {
  background: var(--success-bg);
  color: var(--success);
  border: 1px solid rgba(16,185,129,0.2);
}

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

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
}

.btn-ghost:hover { background: var(--glass-bg); color: var(--text-primary); }

.btn-icon {
  width: 36px;
  height: 36px;
  padding: 0;
  border-radius: var(--radius-sm);
}

.btn-lg { padding: 14px 28px; font-size: 16px; }
.btn-sm { padding: 7px 14px; font-size: 12px; }
.btn-full { width: 100%; }

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

.btn-loading .btn-text { opacity: 0; }
.btn-loading::before {
  content: '';
  position: absolute;
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

/* ── Auth Error ── */
.auth-error {
  background: var(--danger-bg);
  border: 1px solid rgba(239,68,68,0.3);
  border-radius: var(--radius-md);
  padding: 12px 16px;
  font-size: 13px;
  color: var(--danger);
  margin-bottom: 18px;
  display: none;
}

.auth-error.show { display: flex; align-items: center; gap: 8px; }

.auth-divider {
  text-align: center;
  color: var(--text-muted);
  font-size: 13px;
  margin: 20px 0;
  position: relative;
}

.auth-divider::before, .auth-divider::after {
  content: '';
  position: absolute;
  top: 50%;
  width: calc(50% - 30px);
  height: 1px;
  background: var(--border);
}

.auth-divider::before { left: 0; }
.auth-divider::after  { right: 0; }

/* ══════════════════════════════════════════════
   APP LAYOUT
══════════════════════════════════════════════ */

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

/* ── Sidebar ── */
.sidebar {
  width: var(--sidebar-width);
  min-height: 100vh;
  background: var(--bg-surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 100;
  transition: width var(--transition-normal);
  overflow: hidden;
}

.sidebar.collapsed { width: var(--sidebar-collapsed); }

.sidebar-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 20px 18px;
  border-bottom: 1px solid var(--border);
  min-height: var(--topbar-height);
}

.sidebar-logo-icon {
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  flex-shrink: 0;
  box-shadow: 0 0 15px var(--primary-glow);
}

.sidebar-logo-text {
  font-size: 18px;
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary-light), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  white-space: nowrap;
  overflow: hidden;
}

.sidebar-nav {
  flex: 1;
  padding: 16px 12px;
  overflow-y: auto;
}

.nav-section-label {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--text-muted);
  padding: 4px 8px;
  margin: 16px 0 8px;
}

.sidebar.collapsed .nav-section-label { display: none; }

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  margin-bottom: 2px;
  white-space: nowrap;
  position: relative;
}

.nav-item:hover {
  background: var(--glass-bg);
  color: var(--text-primary);
}

.nav-item.active {
  background: linear-gradient(135deg, rgba(99,102,241,0.2), rgba(99,102,241,0.05));
  color: var(--primary-light);
  border: 1px solid rgba(99,102,241,0.2);
}

.nav-item.active::before {
  content: '';
  position: absolute;
  left: 0;
  top: 25%;
  bottom: 25%;
  width: 3px;
  background: var(--primary);
  border-radius: 0 3px 3px 0;
}

.nav-item-icon {
  width: 20px;
  text-align: center;
  font-size: 16px;
  flex-shrink: 0;
}

.nav-item-text {
  font-size: 14px;
  font-weight: 500;
  overflow: hidden;
}

.nav-badge {
  margin-left: auto;
  background: var(--primary);
  color: #fff;
  font-size: 10px;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: var(--radius-full);
  flex-shrink: 0;
}

.sidebar-footer {
  padding: 16px 12px;
  border-top: 1px solid var(--border);
}

.user-info {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background var(--transition-fast);
  white-space: nowrap;
}

.user-info:hover { background: var(--glass-bg); }

.user-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 14px;
  color: #fff;
  flex-shrink: 0;
}

.user-details { overflow: hidden; }

.user-name {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
  overflow: hidden;
  text-overflow: ellipsis;
}

.user-role {
  font-size: 11px;
  color: var(--text-muted);
}

/* ── Main Content ── */
.main-content {
  margin-left: var(--sidebar-width);
  flex: 1;
  min-height: 100vh;
  transition: margin-left var(--transition-normal);
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.main-content.expanded { margin-left: var(--sidebar-collapsed); }

/* ── Topbar ── */
.topbar {
  height: var(--topbar-height);
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 24px;
  gap: 16px;
  position: sticky;
  top: 0;
  z-index: 50;
}

.topbar-toggle {
  width: 36px;
  height: 36px;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  transition: all var(--transition-fast);
}

.topbar-toggle:hover {
  background: var(--glass-bg);
  color: var(--text-primary);
}

.topbar-search {
  flex: 1;
  max-width: 400px;
  position: relative;
}

.topbar-search input {
  width: 100%;
  padding: 9px 16px 9px 40px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  color: var(--text-primary);
  font-size: 14px;
  font-family: inherit;
  outline: none;
  transition: all var(--transition-fast);
}

.topbar-search input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-glow);
}

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

.topbar-search i {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: auto;
}

.topbar-btn {
  width: 38px;
  height: 38px;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 17px;
  transition: all var(--transition-fast);
  position: relative;
}

.topbar-btn:hover {
  background: var(--glass-bg);
  color: var(--text-primary);
}

.topbar-btn .badge {
  position: absolute;
  top: 4px;
  right: 4px;
  width: 8px;
  height: 8px;
  background: var(--danger);
  border-radius: 50%;
  border: 2px solid var(--bg-surface);
}

/* ── Page Content ── */
.page-content {
  flex: 1;
  padding: 28px 32px;
  max-width: 1600px;
}

.page-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 28px;
  gap: 16px;
}

.page-title {
  font-size: 26px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.page-subtitle {
  font-size: 14px;
  color: var(--text-secondary);
}

/* ══════════════════════════════════════════════
   DASHBOARD / STATS
══════════════════════════════════════════════ */

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
  margin-bottom: 28px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  position: relative;
  overflow: hidden;
  transition: all var(--transition-normal);
  cursor: pointer;
}

.stat-card:hover {
  border-color: var(--border-strong);
  background: var(--bg-card-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.stat-card::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 80px;
  height: 80px;
  border-radius: 50%;
  opacity: 0.08;
  transform: translate(30%, -30%);
}

.stat-card.purple::before { background: var(--primary); border: 1px solid var(--border-strong); }
.stat-card.cyan::before   { background: var(--accent); }
.stat-card.green::before  { background: var(--success); }
.stat-card.amber::before  { background: var(--warning); }

.stat-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  margin-bottom: 16px;
}

.stat-card.purple .stat-icon { background: rgba(99,102,241,0.15); color: var(--primary-light); }
.stat-card.cyan   .stat-icon { background: rgba(34,211,238,0.15); color: var(--accent); }
.stat-card.green  .stat-icon { background: rgba(16,185,129,0.15); color: var(--success); }
.stat-card.amber  .stat-icon { background: rgba(245,158,11,0.15);  color: var(--warning); }

.stat-value {
  font-size: 32px;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1;
  margin-bottom: 6px;
}

.stat-label {
  font-size: 13px;
  color: var(--text-secondary);
  font-weight: 500;
}

.stat-change {
  margin-top: 12px;
  font-size: 12px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 4px;
}

.stat-change.up   { color: var(--success); }
.stat-change.down { color: var(--danger); }

/* ── Charts Grid ── */
.charts-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 20px;
  margin-bottom: 28px;
}

.chart-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
}

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

.chart-card-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
}

.chart-wrapper {
  position: relative;
  width: 100%;
}

/* ══════════════════════════════════════════════
   TASKS
══════════════════════════════════════════════ */

.tasks-controls {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.filter-group {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.filter-btn {
  padding: 7px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  background: transparent;
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  font-family: inherit;
}

.filter-btn:hover {
  border-color: var(--primary);
  color: var(--primary-light);
}

.filter-btn.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

.select-control {
  padding: 8px 12px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 13px;
  font-family: inherit;
  outline: none;
  cursor: pointer;
  transition: border-color var(--transition-fast);
}

.select-control:focus { border-color: var(--primary); }
.select-control option { background: var(--bg-card); }

/* ── View Toggle ── */
.view-toggle {
  display: flex;
  background: var(--bg-input);
  border-radius: var(--radius-md);
  padding: 3px;
  gap: 3px;
}

.view-btn {
  width: 32px;
  height: 32px;
  border: none;
  background: transparent;
  color: var(--text-muted);
  border-radius: calc(var(--radius-md) - 2px);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  transition: all var(--transition-fast);
}

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

/* ── Task List ── */
.tasks-list { display: flex; flex-direction: column; gap: 12px; }

.task-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
  transition: all var(--transition-normal);
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.task-card::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
}

.task-card.priority-urgent::before { background: var(--danger); }
.task-card.priority-high::before   { background: var(--warning); }
.task-card.priority-medium::before { background: var(--primary); }
.task-card.priority-low::before    { background: var(--success); }

.task-card:hover {
  border-color: var(--border-strong);
  background: var(--bg-card-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.task-card-header {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 10px;
}

.task-checkbox {
  width: 20px;
  height: 20px;
  border: 2px solid var(--border-strong);
  border-radius: 6px;
  cursor: pointer;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  margin-top: 2px;
}

.task-checkbox:hover { border-color: var(--primary); }
.task-checkbox.checked { background: var(--primary); border-color: var(--primary); color: #fff; font-size: 11px; }

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

.task-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.task-card.done .task-title {
  text-decoration: line-through;
  color: var(--text-muted);
}

.task-desc {
  font-size: 13px;
  color: var(--text-secondary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.task-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.task-actions {
  display: flex;
  gap: 4px;
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.task-card:hover .task-actions { opacity: 1; }

.task-tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-top: 12px;
}

/* ── Badges & Tags ── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.3px;
}

.badge-primary { background: rgba(99,102,241,0.15); color: var(--primary-light); }
.badge-success { background: var(--success-bg); color: var(--success); }
.badge-warning { background: var(--warning-bg); color: var(--warning); }
.badge-danger  { background: var(--danger-bg);  color: var(--danger); }
.badge-info    { background: var(--info-bg);    color: var(--info); }
.badge-muted   { background: var(--glass-bg);   color: var(--text-muted); border: 1px solid var(--border); }

/* Status badges */
.status-todo       { background: rgba(100,116,139,0.15); color: #94a3b8; }
.status-in_progress{ background: rgba(59,130,246,0.15);  color: #60a5fa; }
.status-review     { background: rgba(245,158,11,0.15);  color: #fbbf24; }
.status-done       { background: rgba(16,185,129,0.15);  color: #34d399; }
.status-cancelled  { background: rgba(239,68,68,0.1);    color: #f87171; }

/* Priority badges */
.priority-urgent { background: rgba(239,68,68,0.15);  color: #f87171; }
.priority-high   { background: rgba(245,158,11,0.15); color: #fbbf24; }
.priority-medium { background: rgba(99,102,241,0.15); color: var(--primary-light); }
.priority-low    { background: rgba(16,185,129,0.15); color: #34d399; }

/* Due date */
.due-date {
  font-size: 12px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 4px;
}

.due-date.overdue { color: var(--danger); }
.due-date.soon    { color: var(--warning); }

/* ── Kanban Grid ── */
.kanban-board {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
  align-items: start;
}

.kanban-col {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 16px;
}

.kanban-col-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.kanban-col-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 8px;
}

.kanban-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.kanban-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 14px;
  margin-bottom: 10px;
  cursor: pointer;
  transition: all var(--transition-normal);
}

.kanban-card:hover {
  border-color: var(--primary);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

/* ══════════════════════════════════════════════
   MODAL
══════════════════════════════════════════════ */

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.7);
  backdrop-filter: blur(4px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

.modal-overlay.open {
  opacity: 1;
  visibility: visible;
}

.modal {
  background: var(--bg-modal);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-xl);
  width: 100%;
  max-width: 600px;
  max-height: 90vh;
  overflow-y: auto;
  transform: scale(0.92) translateY(20px);
  transition: transform var(--transition-normal);
  box-shadow: var(--shadow-lg);
}

.modal-overlay.open .modal {
  transform: scale(1) translateY(0);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 28px 0;
}

.modal-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
}

.modal-close {
  width: 32px;
  height: 32px;
  border: none;
  background: var(--glass-bg);
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.modal-close:hover { background: var(--danger-bg); color: var(--danger); }

.modal-body { padding: 24px 28px; }

.modal-footer {
  padding: 0 28px 24px;
  display: flex;
  justify-content: flex-end;
  gap: 12px;
  border-top: 1px solid var(--border);
  padding-top: 20px;
  margin-top: 4px;
}

/* ── Form Row ── */
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-hint {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 5px;
}

textarea.form-control {
  resize: vertical;
  min-height: 90px;
}

/* ══════════════════════════════════════════════
   NOTIFICATIONS / TOASTS
══════════════════════════════════════════════ */

.toast-container {
  position: fixed;
  top: 24px;
  right: 24px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 10px;
  pointer-events: none;
}

.toast {
  background: var(--bg-card);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  padding: 16px 20px;
  min-width: 300px;
  max-width: 420px;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  box-shadow: var(--shadow-lg);
  pointer-events: all;
  animation: toastIn 0.35s ease;
}

.toast.removing { animation: toastOut 0.3s ease forwards; }

@keyframes toastIn {
  from { opacity: 0; transform: translateX(100%); }
  to   { opacity: 1; transform: translateX(0); }
}

@keyframes toastOut {
  from { opacity: 1; transform: translateX(0); }
  to   { opacity: 0; transform: translateX(100%); }
}

.toast-icon {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  flex-shrink: 0;
}

.toast.success { border-left: 3px solid var(--success); }
.toast.success .toast-icon { background: var(--success-bg); color: var(--success); }

.toast.error { border-left: 3px solid var(--danger); }
.toast.error .toast-icon { background: var(--danger-bg); color: var(--danger); }

.toast.warning { border-left: 3px solid var(--warning); }
.toast.warning .toast-icon { background: var(--warning-bg); color: var(--warning); }

.toast.info { border-left: 3px solid var(--info); }
.toast.info .toast-icon { background: var(--info-bg); color: var(--info); }

.toast-content { flex: 1; }
.toast-title { font-size: 13px; font-weight: 600; color: var(--text-primary); margin-bottom: 3px; }
.toast-msg { font-size: 12px; color: var(--text-secondary); }

/* ── Notification Panel ── */
.notif-panel {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  width: 340px;
  background: var(--bg-card);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  z-index: 200;
  display: none;
}

.notif-panel.open { display: block; animation: fadeInDown 0.2s ease; }

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

.notif-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.notif-item {
  padding: 14px 20px;
  border-bottom: 1px solid var(--border);
  cursor: pointer;
  transition: background var(--transition-fast);
  display: flex;
  gap: 12px;
}

.notif-item:hover { background: var(--glass-bg); }
.notif-item.unread { background: rgba(99,102,241,0.04); }

.notif-dot {
  width: 8px;
  height: 8px;
  background: var(--primary);
  border-radius: 50%;
  flex-shrink: 0;
  margin-top: 6px;
}

.notif-text { font-size: 13px; color: var(--text-primary); margin-bottom: 3px; }
.notif-time { font-size: 11px; color: var(--text-muted); }

/* ══════════════════════════════════════════════
   ACTIVITY LOG
══════════════════════════════════════════════ */

.activity-feed { display: flex; flex-direction: column; }

.activity-item {
  display: flex;
  gap: 14px;
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
  position: relative;
}

.activity-item:last-child { border-bottom: none; }

.activity-avatar {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
  background: linear-gradient(135deg, var(--primary), var(--accent));
}

.activity-body { flex: 1; }

.activity-text {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.5;
}

.activity-text strong { color: var(--text-primary); }

.activity-time {
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 3px;
}

/* ══════════════════════════════════════════════
   COMMENTS
══════════════════════════════════════════════ */

.comments-section { margin-top: 24px; }
.comments-title { font-size: 14px; font-weight: 600; margin-bottom: 16px; color: var(--text-primary); }

.comment-item {
  display: flex;
  gap: 12px;
  margin-bottom: 16px;
}

.comment-content {
  flex: 1;
  background: var(--bg-input);
  border-radius: var(--radius-md);
  padding: 12px 16px;
}

.comment-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 6px;
}

.comment-author { font-size: 13px; font-weight: 600; color: var(--text-primary); }
.comment-time   { font-size: 11px; color: var(--text-muted); }
.comment-text   { font-size: 13px; color: var(--text-secondary); line-height: 1.5; }

.comment-input-row {
  display: flex;
  gap: 10px;
  margin-top: 16px;
  align-items: flex-end;
}

.comment-input-row .form-control {
  flex: 1;
  resize: none;
  min-height: 60px;
}

/* ══════════════════════════════════════════════
   PROGRESS BAR
══════════════════════════════════════════════ */

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

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  border-radius: var(--radius-full);
  transition: width 0.6s ease;
}

/* ══════════════════════════════════════════════
   EMPTY STATE
══════════════════════════════════════════════ */

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

.empty-state-icon {
  font-size: 56px;
  margin-bottom: 16px;
  opacity: 0.4;
}

.empty-state-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.empty-state-text {
  font-size: 14px;
  max-width: 300px;
  margin: 0 auto 20px;
}

/* ══════════════════════════════════════════════
   LOADING SKELETON
══════════════════════════════════════════════ */

.skeleton {
  background: linear-gradient(90deg, var(--bg-card) 25%, var(--bg-card-hover) 50%, var(--bg-card) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.4s infinite;
  border-radius: var(--radius-md);
}

@keyframes shimmer {
  0%   { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ══════════════════════════════════════════════
   UTILITY CLASSES
══════════════════════════════════════════════ */

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-4 { gap: 4px; }
.gap-8 { gap: 8px; }
.gap-12 { gap: 12px; }
.gap-16 { gap: 16px; }
.flex-1 { flex: 1; }

.text-sm { font-size: 13px; }
.text-xs { font-size: 11px; }
.text-lg { font-size: 18px; }
.text-xl { font-size: 22px; }
.font-bold { font-weight: 700; }
.font-semibold { font-weight: 600; }

.text-muted { color: var(--text-muted); }
.text-secondary { color: var(--text-secondary); }
.text-primary-color { color: var(--primary-light); }
.text-success { color: var(--success); }
.text-danger  { color: var(--danger); }
.text-warning { color: var(--warning); }

.mb-4  { margin-bottom: 4px; }
.mb-8  { margin-bottom: 8px; }
.mb-12 { margin-bottom: 12px; }
.mb-16 { margin-bottom: 16px; }
.mb-24 { margin-bottom: 24px; }
.mt-8  { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.ml-auto { margin-left: auto; }

.w-full { width: 100%; }
.hidden { display: none !important; }

.divider {
  height: 1px;
  background: var(--border);
  margin: 20px 0;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.section-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 16px;
}

/* ══════════════════════════════════════════════
   RESPONSIVE
══════════════════════════════════════════════ */

@media (max-width: 1024px) {
  .charts-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  :root {
    --sidebar-width: 0px;
  }

  .sidebar {
    transform: translateX(-100%);
    width: 260px;
    box-shadow: var(--shadow-lg);
  }

  .sidebar.mobile-open {
    transform: translateX(0);
  }

  .main-content { margin-left: 0 !important; }

  .page-content { padding: 16px; }

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

  .form-row { grid-template-columns: 1fr; }

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

  .kanban-board { grid-template-columns: 1fr; }

  .modal { max-width: 100%; border-radius: var(--radius-lg); }
}

@media (max-width: 480px) {
  .stats-grid { grid-template-columns: 1fr; }
  .tasks-controls { gap: 8px; }
  .topbar-search { display: none; }
}

/* ── Smooth page transitions ── */
.page-content { animation: fadeIn 0.3s ease; }

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

/* ── Tooltip ── */
[data-tooltip] { position: relative; }
[data-tooltip]:hover::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  background: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  padding: 6px 10px;
  font-size: 12px;
  white-space: nowrap;
  z-index: 1000;
  box-shadow: var(--shadow-md);
}

/* ── Settings Layout ── */
.settings-layout {
  display: flex;
  gap: 24px;
  align-items: flex-start;
  margin-top: 16px;
}
.settings-sidebar {
  flex: 0 0 240px;
  padding: 16px 0;
}
.settings-nav {
  list-style: none;
  padding: 0;
  margin: 0;
}
.settings-nav li {
  padding: 12px 20px;
  cursor: pointer;
  color: var(--text-secondary);
  font-weight: 500;
  border-right: 3px solid transparent;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  gap: 12px;
}
.settings-nav li:hover {
  background: var(--glass-bg);
  color: var(--text-primary);
}
.settings-nav li.active {
  color: var(--primary-light);
  border-right-color: var(--primary);
  background: rgba(99, 102, 241, 0.1);
}
.settings-nav li i {
  width: 20px;
  text-align: center;
}
.settings-content {
  flex: 1;
  padding: 24px 32px;
  min-height: 400px;
}
.settings-tab {
  display: none;
}
.settings-tab.active {
  display: block;
  animation: fadeIn 0.3s ease;
}
.settings-title {
  font-size: 20px;
  margin-bottom: 16px;
  color: var(--text-primary);
}
.settings-group {
  display: flex;
  flex-direction: column;
}
.settings-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 0;
  border-bottom: 1px solid var(--border);
}
.settings-item:last-child {
  border-bottom: none;
}
.settings-info h3 {
  font-size: 15px;
  margin-bottom: 4px;
  color: var(--text-primary);
}
.settings-info p {
  font-size: 13px;
  color: var(--text-secondary);
}

/* ── Toggle Switch ── */
.toggle-switch {
  position: relative;
  display: inline-block;
  width: 44px;
  height: 24px;
}
.toggle-switch input {
  opacity: 0;
  width: 0;
  height: 0;
}
.toggle-slider {
  position: absolute;
  cursor: pointer;
  top: 0; left: 0; right: 0; bottom: 0;
  background-color: rgba(255,255,255,0.1);
  transition: .4s;
  border-radius: 34px;
  border: 1px solid var(--border-strong);
}
.toggle-slider:before {
  position: absolute;
  content: "";
  height: 18px;
  width: 18px;
  left: 2px;
  bottom: 2px;
  background-color: #fff;
  transition: .4s;
  border-radius: 50%;
  box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}
input:checked + .toggle-slider {
  background-color: var(--primary);
  border-color: var(--primary-dark);
}
input:checked + .toggle-slider:before {
  transform: translateX(20px);
}

@media (max-width: 768px) {
  .settings-layout {
    flex-direction: column;
  }
  .settings-sidebar {
    width: 100%;
    flex: auto;
  }
  .settings-nav {
    display: flex;
    overflow-x: auto;
    padding-bottom: 4px;
  }
  .settings-nav li {
    border-right: none;
    border-bottom: 3px solid transparent;
    white-space: nowrap;
  }
  .settings-nav li.active {
    border-right-color: transparent;
    border-bottom-color: var(--primary);
  }
}

/* ── Light Mode Variables ── */
body.light-mode {
  --bg-base: #f8fafc;
  --bg-surface: #ffffff;
  --bg-card: #ffffff;
  --bg-card-hover: #f1f5f9;
  --bg-input: #f1f5f9;
  --bg-modal: #ffffff;

  --border: rgba(0,0,0,0.08);
  --border-strong: rgba(0,0,0,0.15);
  
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --text-disabled: #94a3b8;

  --glass-bg: rgba(0,0,0,0.02);
  --glass-border: rgba(0,0,0,0.05);
  --glass-shadow: 0 4px 12px rgba(0,0,0,0.05);
}
body.light-mode .toggle-slider {
  background-color: rgba(0,0,0,0.1);
}
body.light-mode .toggle-slider:before {
  background-color: #fff;
}