/* ===== DESIGN TOKENS ===== */
  :root {
    --bg: #fff5f7;
    --surface: #ffffff;
    --surface2: #fff0f3;
    --border: #f5d5de;
    --text: #2d1a20;
    --text2: #7a4d5a;
    --text3: #b8899a;
    --accent: #d4608a;
    --accent2: #b84070;
    --accent-soft: #fde8ef;
    --green: #22c07a;
    --green-soft: #e0faf0;
    --red: #e05575;
    --red-soft: #fdedf1;
    --orange: #f0956a;
    --orange-soft: #fef2ec;
    --yellow: #f7c59f;
    --yellow-soft: #fef8f3;
    --shadow: 0 2px 12px rgba(212,96,138,0.10);
    --shadow-lg: 0 8px 32px rgba(212,96,138,0.18);
    --radius: 16px;
    --radius-sm: 10px;
    --transition: 0.22s cubic-bezier(.4,0,.2,1);
    --font: 'Nunito', sans-serif;
    --font-display: 'Fraunces', serif;
    --sidebar-w: 220px;
    --header-h: 62px;
  }
  .theme-pink {
    --bg: #fce8ef;
    --surface: #fff5f8;
    --surface2: #fbd5e3;
    --border: #f0b8cc;
    --accent: #c04070;
    --accent2: #9c2f58;
    --accent-soft: #fbd5e3;
    --shadow: 0 2px 12px rgba(192,64,112,0.12);
    --shadow-lg: 0 8px 32px rgba(192,64,112,0.20);
  }
  .theme-blue {
    --bg: #f0f4ff;
    --surface: #ffffff;
    --surface2: #f7f9ff;
    --border: #dde3f5;
    --text: #1a1f3a;
    --text2: #5a6080;
    --text3: #9099bb;
    --accent: #4f6ef7;
    --accent2: #7b4fff;
    --accent-soft: #e8edff;
    --red: #f75c5c;
    --red-soft: #fff0f0;
    --orange: #ff9f43;
    --orange-soft: #fff5e8;
    --shadow: 0 2px 12px rgba(79,110,247,0.08);
    --shadow-lg: 0 8px 32px rgba(79,110,247,0.14);
  }

  /* ===== RESET ===== */
  *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
  html { font-size: 15px; scroll-behavior: smooth; }
  body { font-family: var(--font); background: var(--bg); color: var(--text); min-height: 100vh; transition: background var(--transition), color var(--transition); }
  button { font-family: var(--font); cursor: pointer; border: none; background: none; }
  input, textarea, select { font-family: var(--font); outline: none; border: none; background: none; }
  ul, ol { list-style: none; }
  a { text-decoration: none; color: inherit; }

  /* ===== LOGIN SCREEN ===== */
  #login-screen {
    position: fixed; inset: 0; z-index: 1000;
    background: linear-gradient(135deg, #e8789e 0%, #d4608a 40%, #b84070 100%);
    display: flex; align-items: center; justify-content: center;
    transition: opacity 0.6s, transform 0.6s;
    padding: 20px;
  }
  #login-screen.hidden { opacity: 0; pointer-events: none; transform: scale(1.05); }
  .login-card {
    background: rgba(255,255,255,0.15);
    backdrop-filter: blur(24px);
    border: 1px solid rgba(255,255,255,0.3);
    border-radius: 28px;
    padding: 36px 40px 32px;
    width: 100%; max-width: 420px;
    text-align: center;
    box-shadow: 0 24px 64px rgba(0,0,0,0.2);
    animation: floatIn 0.7s ease;
  }
  @keyframes floatIn { from { opacity:0; transform:translateY(30px); } to { opacity:1; transform:translateY(0); } }
  .login-logo { font-family: var(--font-display); font-size: 2.4rem; color: #fff; font-weight: 700; margin-bottom: 4px; }
  .login-logo span { font-style: italic; opacity: 0.85; }
  .login-tagline { color: rgba(255,255,255,0.75); font-size: 0.9rem; margin-bottom: 24px; }

  /* Auth tabs */
  .auth-tabs { display: flex; gap: 0; margin-bottom: 24px; background: rgba(0,0,0,0.15); border-radius: 12px; padding: 4px; }
  .auth-tab {
    flex: 1; padding: 10px; border-radius: 9px; font-family: var(--font);
    font-weight: 800; font-size: 0.88rem; color: rgba(255,255,255,0.65);
    cursor: pointer; transition: all 0.2s; border: none; background: none;
  }
  .auth-tab.active { background: rgba(255,255,255,0.25); color: #fff; box-shadow: 0 2px 8px rgba(0,0,0,0.15); }
  .auth-panel { display: none; }
  .auth-panel.active { display: block; animation: floatIn 0.3s ease; }

  .login-field {
    background: rgba(255,255,255,0.18);
    border: 1.5px solid rgba(255,255,255,0.35);
    border-radius: 12px;
    padding: 13px 16px;
    width: 100%; color: #fff;
    font-size: 0.97rem; font-family: var(--font);
    margin-bottom: 12px;
    transition: border-color 0.2s;
    display: block;
  }
  .login-field::placeholder { color: rgba(255,255,255,0.6); }
  .login-field:focus { border-color: rgba(255,255,255,0.8); background: rgba(255,255,255,0.22); }
  .login-btn {
    width: 100%; background: #fff;
    color: var(--accent, #c04070); font-weight: 800;
    font-size: 1rem; border-radius: 12px;
    padding: 14px; margin-top: 4px;
    transition: transform 0.15s, box-shadow 0.15s;
    box-shadow: 0 4px 20px rgba(0,0,0,0.15);
    border: none; cursor: pointer; font-family: var(--font);
  }
  .login-btn:hover { transform: translateY(-2px); box-shadow: 0 8px 28px rgba(0,0,0,0.2); }
  .login-btn:active { transform: translateY(0); }
  .auth-error {
    background: rgba(247,92,92,0.25); border: 1px solid rgba(247,92,92,0.5);
    color: #fff; border-radius: 10px; padding: 10px 14px;
    font-size: 0.84rem; font-weight: 600; margin-bottom: 12px;
    display: none; text-align: left;
  }
  .auth-error.show { display: block; animation: floatIn 0.25s ease; }
  .auth-success {
    background: rgba(34,192,122,0.25); border: 1px solid rgba(34,192,122,0.5);
    color: #fff; border-radius: 10px; padding: 10px 14px;
    font-size: 0.84rem; font-weight: 600; margin-bottom: 12px;
    display: none; text-align: left;
  }
  .auth-success.show { display: block; animation: floatIn 0.25s ease; }
  .login-themes { display: flex; gap: 10px; justify-content: center; margin-top: 20px; }
  .theme-dot {
    width: 26px; height: 26px; border-radius: 50%; cursor: pointer;
    border: 3px solid rgba(255,255,255,0.5);
    transition: border-color 0.2s, transform 0.2s;
  }
  .theme-dot:hover, .theme-dot.active { border-color: #fff; transform: scale(1.15); }
  .theme-dot.blue-dot { background: linear-gradient(135deg,#4f6ef7,#7b4fff); }
  .theme-dot.pink-dot { background: linear-gradient(135deg,#e84393,#b5369c); }
  .theme-label { color: rgba(255,255,255,0.7); font-size:0.8rem; align-self:center; }
  .floating-accounts { margin-top: 16px; font-size: 0.78rem; color: rgba(255,255,255,0.55); }
  .pwd-hint { font-size:0.75rem; color:rgba(255,255,255,0.55); text-align:left; margin-top:-8px; margin-bottom:12px; }

  /* Sign-out dropdown */
  .user-menu { position: relative; }
  .user-menu-dropdown {
    position: absolute; bottom: calc(100% + 8px); left: 0; right: 0;
    background: var(--surface); border: 1.5px solid var(--border);
    border-radius: 12px; box-shadow: var(--shadow-lg);
    overflow: hidden; display: none; z-index: 200;
  }
  .user-menu.open .user-menu-dropdown { display: block; animation: floatIn 0.2s ease; }
  .user-menu-item {
    padding: 11px 16px; display: flex; align-items: center; gap: 10px;
    font-size: 0.88rem; font-weight: 600; color: var(--text2);
    cursor: pointer; transition: background 0.15s;
  }
  .user-menu-item:hover { background: var(--accent-soft); color: var(--accent); }
  .user-menu-item.danger:hover { background: var(--red-soft); color: var(--red); }
  .user-menu-item .mi { font-size: 1rem; }

  /* ===== MAIN APP LAYOUT ===== */
  #app { display: none; height: 100vh; overflow: hidden; }
  #app.visible { display: flex; }

  /* Sidebar */
  .sidebar {
    width: var(--sidebar-w); min-height: 100vh;
    background: var(--surface);
    border-right: 1.5px solid var(--border);
    display: flex; flex-direction: column;
    padding: 0;
    position: relative; z-index: 10;
    box-shadow: 2px 0 16px rgba(212,96,138,0.08);
    transition: background var(--transition), border-color var(--transition);
    flex-shrink: 0;
  }
  .sidebar-logo {
    padding: 22px 24px 16px;
    font-family: var(--font-display); font-size: 1.5rem;
    color: var(--accent); font-weight: 700;
    border-bottom: 1.5px solid var(--border);
    display: flex; align-items: center; gap: 8px;
  }
  .sidebar-logo em { font-style: italic; font-size:1.1rem; color: var(--text2); }
  .sidebar-nav { padding: 14px 12px; flex: 1; display: flex; flex-direction: column; gap: 4px; }
  .nav-item {
    display: flex; align-items: center; gap: 11px;
    padding: 11px 14px; border-radius: var(--radius-sm);
    color: var(--text2); font-weight: 600; font-size: 0.92rem;
    cursor: pointer; transition: background var(--transition), color var(--transition);
    position: relative; overflow: hidden;
  }
  .nav-item:hover { background: var(--accent-soft); color: var(--accent); }
  .nav-item.active { background: var(--accent); color: #fff; box-shadow: 0 4px 16px rgba(212,96,138,0.28); }
  .nav-item .nav-icon { font-size: 1.15rem; flex-shrink: 0; }
  .nav-badge {
    margin-left: auto; background: var(--red);
    color: #fff; font-size: 0.7rem; font-weight: 800;
    border-radius: 999px; padding: 1px 7px; min-width: 20px; text-align: center;
  }
  .nav-item.active .nav-badge { background: rgba(255,255,255,0.3); }
  .sidebar-footer {
    padding: 16px 20px;
    border-top: 1.5px solid var(--border);
    display: flex; align-items: center; gap: 10px;
  }
  .user-avatar {
    width: 36px; height: 36px; border-radius: 50%;
    background: linear-gradient(135deg,var(--accent),var(--accent2));
    display: flex; align-items: center; justify-content: center;
    color: #fff; font-weight: 800; font-size: 0.92rem;
    flex-shrink: 0;
  }
  .user-name { font-weight: 700; font-size: 0.88rem; color: var(--text); flex: 1; }
  .user-role { font-size: 0.75rem; color: var(--text3); }
  .theme-toggle-btn {
    width: 32px; height: 32px; border-radius: 50%;
    background: var(--accent-soft); color: var(--accent);
    display: flex; align-items: center; justify-content: center;
    font-size: 1rem; transition: background 0.2s, transform 0.2s;
    flex-shrink: 0;
  }
  .theme-toggle-btn:hover { background: var(--accent); color: #fff; transform: rotate(30deg); }

  /* Main area */
  .main-content { flex: 1; display: flex; flex-direction: column; overflow: hidden; }
  .topbar {
    height: var(--header-h); border-bottom: 1.5px solid var(--border);
    background: var(--surface);
    display: flex; align-items: center;
    padding: 0 28px; gap: 16px;
    box-shadow: 0 2px 8px rgba(212,96,138,0.06);
    flex-shrink: 0;
  }
  .topbar-title { font-family: var(--font-display); font-size: 1.2rem; font-weight: 700; color: var(--text); }
  .topbar-subtitle { font-size: 0.82rem; color: var(--text3); margin-left: 2px; }
  .topbar-actions { margin-left: auto; display: flex; align-items: center; gap: 10px; }
  .btn {
    display: inline-flex; align-items: center; gap: 7px;
    padding: 9px 18px; border-radius: 10px;
    font-weight: 700; font-size: 0.88rem;
    transition: all var(--transition); cursor: pointer;
  }
  .btn-primary { background: var(--accent); color: #fff; box-shadow: 0 2px 10px rgba(212,96,138,0.25); }
  .btn-primary:hover { opacity: 0.88; transform: translateY(-1px); box-shadow: 0 4px 18px rgba(212,96,138,0.38); }
  .btn-ghost { color: var(--accent); background: var(--accent-soft); }
  .btn-ghost:hover { background: var(--accent); color: #fff; }
  .btn-danger { background: var(--red-soft); color: var(--red); }
  .btn-danger:hover { background: var(--red); color: #fff; }
  .btn-sm { padding: 6px 12px; font-size: 0.8rem; border-radius: 8px; }
  .btn-icon { padding: 8px; border-radius: 8px; }

  /* Page content */
  .page-content { flex: 1; overflow-y: auto; padding: 28px; }
  .page { display: none; animation: pageIn 0.32s ease; }
  .page.active { display: block; }
  @keyframes pageIn { from { opacity:0; transform:translateY(10px); } to { opacity:1; transform:translateY(0); } }

  /* ===== DASHBOARD ===== */
  .dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 18px; margin-bottom: 28px;
  }
  .stat-card {
    background: var(--surface); border-radius: var(--radius);
    padding: 22px 22px 18px; border: 1.5px solid var(--border);
    box-shadow: var(--shadow);
    position: relative; overflow: hidden;
    transition: transform 0.2s, box-shadow 0.2s;
  }
  .stat-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
  .stat-card::before {
    content: ''; position: absolute; top: -20px; right: -20px;
    width: 80px; height: 80px; border-radius: 50%;
    opacity: 0.1;
  }
  .stat-card.blue::before { background: var(--accent); }
  .stat-card.green::before { background: var(--green); }
  .stat-card.red::before { background: var(--red); }
  .stat-card.orange::before { background: var(--orange); }
  .stat-icon { font-size: 1.6rem; margin-bottom: 10px; }
  .stat-value { font-size: 2rem; font-weight: 900; color: var(--text); line-height: 1; }
  .stat-label { font-size: 0.82rem; color: var(--text3); margin-top: 4px; font-weight: 600; }
  .stat-trend { font-size: 0.78rem; color: var(--green); font-weight: 700; margin-top: 6px; }

  .section-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 16px; }
  .section-title { font-size: 1rem; font-weight: 800; color: var(--text); }
  .section-link { font-size: 0.82rem; color: var(--accent); font-weight: 700; cursor: pointer; }
  .section-link:hover { text-decoration: underline; }

  .quick-tasks { background: var(--surface); border-radius: var(--radius); border: 1.5px solid var(--border); padding: 20px; }
  .quick-task-item {
    display: flex; align-items: center; gap: 12px;
    padding: 10px 0; border-bottom: 1px solid var(--border);
  }
  .quick-task-item:last-child { border-bottom: none; }
  .task-check {
    width: 20px; height: 20px; border-radius: 50%;
    border: 2px solid var(--border); cursor: pointer;
    flex-shrink: 0; display: flex; align-items: center; justify-content: center;
    transition: all 0.2s; position: relative;
  }
  .task-check.done { background: var(--green); border-color: var(--green); }
  .task-check.done::after { content: '✓'; color: #fff; font-size: 0.75rem; font-weight: 900; }
  .task-text { flex: 1; font-size: 0.9rem; color: var(--text); font-weight: 500; }
  .task-text.done { text-decoration: line-through; color: var(--text3); }
  .task-due { font-size: 0.76rem; color: var(--text3); font-weight: 600; }
  .task-due.overdue { color: var(--red); }
  .tag {
    display: inline-flex; align-items: center; gap: 4px;
    padding: 3px 9px; border-radius: 999px;
    font-size: 0.72rem; font-weight: 700;
  }
  .tag.exam { background: var(--red-soft); color: var(--red); }
  .tag.class { background: #e8edff; color: var(--accent); }
  .tag.study { background: var(--green-soft); color: var(--green); }
  .tag.assignment { background: var(--orange-soft); color: var(--orange); }

  /* Progress bar */
  .progress-wrap { margin-top: 8px; }
  .progress-label { display: flex; justify-content: space-between; font-size: 0.78rem; color: var(--text3); margin-bottom: 5px; }
  .progress-bar { height: 8px; background: var(--border); border-radius: 999px; overflow: hidden; }
  .progress-fill {
    height: 100%; border-radius: 999px;
    background: linear-gradient(90deg, #e8789e, var(--accent));
    transition: width 0.8s cubic-bezier(.4,0,.2,1);
    position: relative;
  }
  .progress-fill::after {
    content: ''; position: absolute; inset: 0;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.4), transparent);
    animation: shimmer 2s infinite;
  }
  @keyframes shimmer { from { transform: translateX(-100%); } to { transform: translateX(100%); } }
  .progress-fill.green { background: linear-gradient(90deg, var(--green), #0adc8a); }
  .progress-fill.red { background: linear-gradient(90deg, var(--orange), var(--red)); }

  /* ===== TODO PAGE ===== */
  .todo-filters { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 20px; }
  .filter-btn {
    padding: 7px 16px; border-radius: 999px; font-size: 0.82rem;
    font-weight: 700; cursor: pointer; transition: all 0.18s;
    border: 1.5px solid var(--border); color: var(--text2);
    background: var(--surface);
  }
  .filter-btn:hover, .filter-btn.active { background: var(--accent); color: #fff; border-color: var(--accent); }
  .todo-input-row {
    display: flex; gap: 10px; margin-bottom: 22px;
    background: var(--surface); padding: 14px; border-radius: var(--radius);
    border: 1.5px solid var(--border); box-shadow: var(--shadow);
    flex-wrap: wrap;
  }
  .input-field {
    flex: 1; min-width: 140px; padding: 10px 14px;
    background: var(--bg); border: 1.5px solid var(--border);
    border-radius: 10px; color: var(--text); font-size: 0.9rem;
    transition: border-color 0.2s;
  }
  .input-field:focus { border-color: var(--accent); }
  .input-field::placeholder { color: var(--text3); }
  select.input-field { cursor: pointer; }
  .todo-list { display: flex; flex-direction: column; gap: 10px; }
  .todo-card {
    background: var(--surface); border-radius: var(--radius-sm);
    border: 1.5px solid var(--border); padding: 14px 16px;
    display: flex; align-items: flex-start; gap: 12px;
    box-shadow: var(--shadow); transition: all 0.2s;
    position: relative;
  }
  .todo-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-1px); }
  .todo-card.done-card { opacity: 0.6; }
  .todo-card-body { flex: 1; }
  .todo-card-title { font-weight: 700; font-size: 0.95rem; color: var(--text); margin-bottom: 4px; }
  .todo-card-title.done { text-decoration: line-through; color: var(--text3); }
  .todo-card-meta { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
  .todo-card-actions { display: flex; gap: 6px; align-items: center; }
  .icon-btn {
    width: 30px; height: 30px; border-radius: 8px;
    display: flex; align-items: center; justify-content: center;
    font-size: 0.85rem; cursor: pointer; transition: all 0.15s;
    color: var(--text3); background: var(--bg);
  }
  .icon-btn:hover { color: var(--accent); background: var(--accent-soft); }
  .icon-btn.danger:hover { color: var(--red); background: var(--red-soft); }
  .priority-dot {
    width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0; margin-top: 7px;
  }
  .priority-dot.high { background: var(--red); }
  .priority-dot.medium { background: var(--orange); }
  .priority-dot.low { background: var(--green); }
  .empty-state {
    text-align: center; padding: 60px 20px;
    color: var(--text3);
  }
  .empty-icon { font-size: 3rem; margin-bottom: 12px; opacity: 0.5; }
  .empty-text { font-size: 1rem; font-weight: 600; }

  /* ===== NOTES PAGE ===== */
  .notes-layout { display: grid; grid-template-columns: 220px 1fr; gap: 20px; min-height: 400px; }
  .subjects-sidebar {
    background: var(--surface); border-radius: var(--radius);
    border: 1.5px solid var(--border); padding: 16px;
    box-shadow: var(--shadow);
  }
  .subjects-title { font-size: 0.82rem; font-weight: 800; color: var(--text3); text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 12px; }
  .subject-item {
    padding: 9px 12px; border-radius: 9px; cursor: pointer;
    font-size: 0.88rem; font-weight: 600; color: var(--text2);
    display: flex; align-items: center; justify-content: space-between;
    transition: all 0.18s; margin-bottom: 3px;
  }
  .subject-item:hover { background: var(--accent-soft); color: var(--accent); }
  .subject-item.active { background: var(--accent); color: #fff; }
  .subject-count {
    font-size: 0.72rem; font-weight: 800;
    background: rgba(0,0,0,0.1); padding: 1px 7px; border-radius: 999px;
  }
  .subject-item.active .subject-count { background: rgba(255,255,255,0.25); }
  .add-subject-row { display: flex; gap: 6px; margin-top: 12px; }
  .add-subject-row .input-field { font-size: 0.82rem; padding: 7px 10px; }
  .notes-area { display: flex; flex-direction: column; gap: 16px; }
  .note-compose {
    background: var(--surface); border-radius: var(--radius);
    border: 1.5px solid var(--border); padding: 18px;
    box-shadow: var(--shadow);
  }
  .note-compose-title { font-weight: 800; font-size: 0.9rem; color: var(--text); margin-bottom: 12px; }
  .note-compose textarea {
    width: 100%; resize: vertical; min-height: 90px;
    background: var(--bg); border: 1.5px solid var(--border);
    border-radius: 10px; padding: 12px 14px; font-size: 0.9rem; color: var(--text);
    transition: border-color 0.2s; line-height: 1.6;
  }
  .note-compose textarea:focus { border-color: var(--accent); }
  .note-compose textarea::placeholder { color: var(--text3); }
  .notes-list { display: flex; flex-direction: column; gap: 12px; }
  .note-card {
    background: var(--surface); border-radius: var(--radius-sm);
    border: 1.5px solid var(--border); padding: 16px;
    box-shadow: var(--shadow); transition: all 0.2s;
  }
  .note-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-1px); }
  .note-card-header { display: flex; align-items: flex-start; justify-content: space-between; margin-bottom: 8px; }
  .note-card-title { font-weight: 700; font-size: 0.95rem; color: var(--text); }
  .note-card-date { font-size: 0.75rem; color: var(--text3); }
  .note-card-body { font-size: 0.88rem; color: var(--text2); line-height: 1.6; }
  .note-card-actions { display: flex; gap: 6px; }

  /* ===== ACHIEVEMENTS PAGE ===== */
  .achievements-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px,1fr)); gap: 16px; }
  .achievement-card {
    background: var(--surface); border-radius: var(--radius);
    border: 1.5px solid var(--border); padding: 22px;
    box-shadow: var(--shadow); transition: all 0.22s;
    position: relative; overflow: hidden;
  }
  .achievement-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
  .achievement-card::before {
    content: ''; position: absolute; top: 0; left: 0; right: 0; height: 4px;
    background: linear-gradient(90deg, var(--accent), var(--accent2));
  }
  .achievement-icon { font-size: 2rem; margin-bottom: 10px; }
  .achievement-title { font-weight: 800; font-size: 0.98rem; color: var(--text); margin-bottom: 4px; }
  .achievement-desc { font-size: 0.84rem; color: var(--text2); line-height: 1.5; margin-bottom: 12px; }
  .achievement-date { font-size: 0.76rem; color: var(--text3); font-weight: 600; }
  .achievement-milestone {
    display: inline-flex; align-items: center; gap: 5px;
    background: var(--yellow-soft); color: #b58a00;
    padding: 3px 10px; border-radius: 999px;
    font-size: 0.75rem; font-weight: 700; margin-top: 8px;
  }
  .add-achievement-form {
    background: var(--surface); border-radius: var(--radius);
    border: 1.5px solid var(--border); padding: 22px;
    box-shadow: var(--shadow); margin-bottom: 24px;
  }
  .form-row { display: flex; gap: 10px; flex-wrap: wrap; }
  .form-group { display: flex; flex-direction: column; gap: 6px; flex: 1; min-width: 160px; }
  .form-label { font-size: 0.78rem; font-weight: 800; color: var(--text2); text-transform: uppercase; letter-spacing: 0.06em; }

  /* ===== STUDY PLANNER ===== */
  .planner-controls {
    display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 20px; align-items: center;
  }
  .color-legend { display: flex; gap: 14px; flex-wrap: wrap; }
  .legend-item { display: flex; align-items: center; gap: 6px; font-size: 0.8rem; font-weight: 600; color: var(--text2); }
  .legend-dot { width: 12px; height: 12px; border-radius: 50%; flex-shrink: 0; }
  .planner-grid-wrap { overflow-x: auto; }
  .planner-grid {
    display: grid;
    grid-template-columns: 70px repeat(7, 1fr);
    gap: 2px;
    min-width: 700px;
  }
  .planner-header-cell {
    background: var(--surface2); border-radius: 8px;
    padding: 10px 6px; text-align: center;
    font-size: 0.78rem; font-weight: 800; color: var(--text2);
    border: 1.5px solid var(--border);
  }
  .planner-time-cell {
    background: var(--surface2); border-radius: 8px;
    padding: 8px 6px; text-align: right;
    font-size: 0.72rem; color: var(--text3); font-weight: 600;
    border: 1.5px solid var(--border); display: flex; align-items: center; justify-content: flex-end;
  }
  .planner-cell {
    background: var(--surface); border: 1.5px solid var(--border);
    border-radius: 8px; min-height: 56px; position: relative;
    transition: background 0.15s;
    cursor: pointer;
  }
  .planner-cell:hover { background: var(--accent-soft); }
  .planner-cell.drag-over { background: var(--accent-soft); border-color: var(--accent); border-style: dashed; }
  .schedule-block {
    position: absolute; inset: 2px; border-radius: 7px;
    padding: 5px 8px; cursor: grab; user-select: none;
    font-size: 0.75rem; font-weight: 700; line-height: 1.3;
    transition: box-shadow 0.15s, transform 0.15s;
    overflow: hidden;
  }
  .schedule-block:active { cursor: grabbing; transform: scale(1.03); box-shadow: 0 6px 20px rgba(0,0,0,0.2); }
  .schedule-block.sync { background: linear-gradient(135deg,#d4608a,#b84070); color: #fff; }
  .schedule-block.async { background: linear-gradient(135deg,#22c07a,#0adc8a); color: #fff; }
  .schedule-block.exam { background: linear-gradient(135deg,#f75c5c,#ff4747); color: #fff; }
  .schedule-block.assignment { background: linear-gradient(135deg,#ff9f43,#ffb347); color: #fff; }
  .block-label { font-weight: 800; font-size: 0.77rem; }
  .block-time { font-size: 0.68rem; opacity: 0.85; }

  /* Reminder */
  .reminders-list { margin-top: 24px; }
  .reminder-item {
    display: flex; align-items: center; gap: 12px;
    background: var(--surface); border-radius: var(--radius-sm);
    border: 1.5px solid var(--border); padding: 12px 16px;
    margin-bottom: 10px; box-shadow: var(--shadow);
    transition: all 0.2s;
  }
  .reminder-item:hover { box-shadow: var(--shadow-lg); transform: translateX(2px); }
  .reminder-dot { width: 10px; height: 10px; border-radius: 50%; flex-shrink: 0; }
  .reminder-text { flex: 1; font-size: 0.88rem; font-weight: 600; color: var(--text); }
  .reminder-time { font-size: 0.78rem; color: var(--text3); font-weight: 700; white-space: nowrap; }
  .reminder-badge { font-size: 0.72rem; font-weight: 800; padding: 2px 8px; border-radius: 999px; }
  .bell-ring { animation: ringBell 0.6s ease; }
  @keyframes ringBell { 0%,100%{transform:rotate(0)} 20%{transform:rotate(-20deg)} 40%{transform:rotate(20deg)} 60%{transform:rotate(-10deg)} 80%{transform:rotate(10deg)} }

  /* Toast */
  .toast-container { position: fixed; top: 20px; right: 20px; z-index: 9999; display: flex; flex-direction: column; gap: 10px; }
  .toast {
    background: var(--text); color: #fff; padding: 13px 18px;
    border-radius: 12px; font-size: 0.88rem; font-weight: 600;
    box-shadow: 0 8px 24px rgba(0,0,0,0.2);
    animation: toastIn 0.3s ease;
    display: flex; align-items: center; gap: 10px;
    max-width: 320px;
  }
  .toast.success { background: var(--green); }
  .toast.error { background: var(--red); }
  .toast.info { background: var(--accent); }
  @keyframes toastIn { from { opacity:0; transform:translateX(30px); } to { opacity:1; transform:translateX(0); } }
  @keyframes toastOut { from { opacity:1; } to { opacity:0; transform:translateX(30px); } }

  /* Modal */
  .modal-overlay {
    position: fixed; inset: 0; z-index: 500;
    background: rgba(10,15,40,0.45); backdrop-filter: blur(4px);
    display: flex; align-items: center; justify-content: center; padding: 20px;
    opacity: 0; pointer-events: none; transition: opacity 0.25s;
  }
  .modal-overlay.open { opacity: 1; pointer-events: all; }
  .modal {
    background: var(--surface); border-radius: 20px;
    padding: 30px 28px; width: 100%; max-width: 460px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.25);
    transform: translateY(20px) scale(0.97);
    transition: transform 0.25s, opacity 0.25s;
  }
  .modal-overlay.open .modal { transform: none; }
  .modal-title { font-family: var(--font-display); font-size: 1.3rem; font-weight: 700; color: var(--text); margin-bottom: 20px; }
  .modal-actions { display: flex; gap: 10px; margin-top: 22px; justify-content: flex-end; }
  .modal .form-group { margin-bottom: 14px; }

  /* Animated checkmark */
  @keyframes checkPop {
    0% { transform: scale(0); }
    60% { transform: scale(1.3); }
    100% { transform: scale(1); }
  }
  .task-check.just-done { animation: checkPop 0.35s ease forwards; }

  /* Confetti */
  .confetti-piece {
    position: fixed; width: 10px; height: 10px;
    border-radius: 2px; pointer-events: none; z-index: 9998;
    animation: confettiFall 1.2s ease forwards;
  }
  @keyframes confettiFall {
    from { transform: translateY(-20px) rotate(0deg); opacity: 1; }
    to { transform: translateY(100vh) rotate(720deg); opacity: 0; }
  }

  /* ===== RESPONSIVE ===== */
  @media (max-width: 720px) {
    :root { --sidebar-w: 0px; }
    .sidebar { display: none; }
    .topbar { padding: 0 16px; }
    .page-content { padding: 16px; }
    .notes-layout { grid-template-columns: 1fr; }
    .dashboard-grid { grid-template-columns: repeat(2,1fr); }
    .mobile-nav {
      position: fixed; bottom: 0; left: 0; right: 0; z-index: 100;
      background: var(--surface); border-top: 1.5px solid var(--border);
      display: flex; padding: 8px 0 12px;
      box-shadow: 0 -4px 20px rgba(212,96,138,0.12);
    }
    .mobile-nav-item {
      flex: 1; display: flex; flex-direction: column; align-items: center; gap: 3px;
      font-size: 0.65rem; font-weight: 700; color: var(--text3); cursor: pointer;
      transition: color 0.2s;
    }
    .mobile-nav-item .nav-icon { font-size: 1.3rem; }
    .mobile-nav-item.active { color: var(--accent); }
    .page-content { padding-bottom: 80px; }
    .achievements-grid { grid-template-columns: 1fr; }
  }
  @media (min-width: 721px) { .mobile-nav { display: none !important; } }
  @media (max-width: 480px) { .dashboard-grid { grid-template-columns: 1fr; } }