:root {
  --primary: #6366f1;
  --primary-dark: #4f46e5;
  --primary-light: #e0e7ff;
  --success: #22c55e;
  --warning: #f59e0b;
  --danger: #ef4444;
  --text: #1e293b;
  --text-muted: #64748b;
  --border: #e2e8f0;
  --bg: #f8fafc;
  --bg-card: #ffffff;
  --radius: 12px;
  --shadow: 0 1px 3px rgba(0,0,0,.08), 0 4px 12px rgba(0,0,0,.05);
  --shadow-lg: 0 4px 20px rgba(0,0,0,.12);
  --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

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

html { font-size: 16px; scroll-behavior: smooth; -webkit-tap-highlight-color: transparent; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

/* ── Layout ── */
.app-wrapper { display: flex; flex-direction: column; min-height: 100vh; }

.topbar {
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  padding: 0 20px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 100;
}
.topbar-brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--primary); font-weight: 700; font-size: 18px; }
.topbar-brand svg { width: 28px; height: 28px; }
.topbar-nav { display: flex; align-items: center; gap: 4px; }
.topbar-nav a {
  color: var(--text-muted);
  text-decoration: none;
  padding: 6px 12px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  transition: background .15s, color .15s;
}
.topbar-nav a:hover, .topbar-nav a.active { background: var(--primary-light); color: var(--primary); }
.topbar-user { display: flex; align-items: center; gap: 8px; }
.avatar {
  width: 36px; height: 36px;
  background: var(--primary);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: white; font-weight: 700; font-size: 14px;
  flex-shrink: 0;
}

.main-content { flex: 1; padding: 24px 20px; max-width: 900px; margin: 0 auto; width: 100%; }

/* ── Cards ── */
.card {
  background: var(--bg-card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 24px;
}
.card-sm { padding: 16px; }

/* ── Buttons ── */
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 10px 18px;
  border-radius: 8px;
  font-size: 14px; font-weight: 600;
  border: none; cursor: pointer;
  text-decoration: none;
  transition: all .15s;
  white-space: nowrap;
}
.btn-primary { background: var(--primary); color: white; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-secondary { background: var(--border); color: var(--text); }
.btn-secondary:hover { background: #cbd5e1; }
.btn-success { background: var(--success); color: white; }
.btn-success:hover { opacity: .9; }
.btn-danger { background: var(--danger); color: white; }
.btn-danger:hover { opacity: .9; }
.btn-ghost { background: transparent; color: var(--text-muted); border: 1px solid var(--border); }
.btn-ghost:hover { background: var(--bg); }
.btn-sm { padding: 6px 12px; font-size: 13px; }
.btn-full { width: 100%; justify-content: center; }

/* ── Forms ── */
.form-group { margin-bottom: 18px; }
.form-label { display: block; font-size: 14px; font-weight: 600; color: var(--text); margin-bottom: 6px; }
.form-control {
  width: 100%;
  padding: 10px 14px;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  font-size: 15px;
  font-family: var(--font);
  color: var(--text);
  background: var(--bg-card);
  transition: border-color .15s, box-shadow .15s;
  appearance: none;
}
.form-control:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(99,102,241,.15); }
.form-control::placeholder { color: #94a3b8; }
select.form-control { background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='2'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 12px center; padding-right: 36px; }
.form-hint { font-size: 12px; color: var(--text-muted); margin-top: 4px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-check { display: flex; align-items: center; gap: 8px; margin-bottom: 8px; }
.form-check input[type=checkbox] { width: 18px; height: 18px; accent-color: var(--primary); }

/* ── Alerts ── */
.alert {
  padding: 12px 16px;
  border-radius: 8px;
  font-size: 14px;
  margin-bottom: 20px;
  display: flex; align-items: flex-start; gap: 10px;
}
.alert-danger { background: #fef2f2; color: #b91c1c; border: 1px solid #fecaca; }
.alert-success { background: #f0fdf4; color: #15803d; border: 1px solid #bbf7d0; }
.alert-warning { background: #fffbeb; color: #92400e; border: 1px solid #fde68a; }
.alert-info { background: #eff6ff; color: #1d4ed8; border: 1px solid #bfdbfe; }

/* ── Reminder Cards ── */
.reminder-list { display: flex; flex-direction: column; gap: 12px; }
.reminder-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 16px 20px;
  display: flex;
  align-items: center;
  gap: 16px;
  text-decoration: none;
  color: var(--text);
  transition: box-shadow .15s, transform .1s;
  border-left: 4px solid var(--border);
}
.reminder-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-1px); }
.reminder-card.overdue { border-left-color: var(--danger); }
.reminder-card.soon { border-left-color: var(--warning); }
.reminder-card.ok { border-left-color: var(--success); }

.reminder-icon {
  width: 44px; height: 44px;
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 20px;
  flex-shrink: 0;
}
.reminder-body { flex: 1; min-width: 0; }
.reminder-title { font-weight: 600; font-size: 15px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.reminder-meta { font-size: 13px; color: var(--text-muted); margin-top: 2px; display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.reminder-badge {
  display: inline-flex; align-items: center;
  padding: 2px 8px; border-radius: 20px;
  font-size: 11px; font-weight: 600;
  white-space: nowrap;
}
.badge-danger { background: #fef2f2; color: #b91c1c; }
.badge-warning { background: #fffbeb; color: #92400e; }
.badge-success { background: #f0fdf4; color: #15803d; }
.badge-neutral { background: var(--bg); color: var(--text-muted); }

/* ── Dashboard Stats ── */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 12px; margin-bottom: 24px; }
.stat-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 16px;
  text-align: center;
  box-shadow: var(--shadow);
}
.stat-value { font-size: 28px; font-weight: 700; color: var(--primary); }
.stat-label { font-size: 12px; color: var(--text-muted); margin-top: 2px; font-weight: 500; }

/* ── Category Grid ── */
.category-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: 12px; }
.category-btn {
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  padding: 16px 12px;
  border-radius: var(--radius);
  border: 2px solid var(--border);
  background: var(--bg-card);
  cursor: pointer;
  text-decoration: none;
  color: var(--text);
  font-size: 13px; font-weight: 600;
  transition: all .15s;
  text-align: center;
}
.category-btn:hover { border-color: var(--primary); background: var(--primary-light); }
.category-icon { font-size: 28px; }

/* ── Progress Bar ── */
.progress-wrap { margin-bottom: 20px; }
.progress-label { display: flex; justify-content: space-between; font-size: 13px; color: var(--text-muted); margin-bottom: 6px; }
.progress { height: 8px; background: var(--border); border-radius: 4px; overflow: hidden; }
.progress-bar { height: 100%; background: var(--primary); border-radius: 4px; transition: width .3s; }

/* ── Section Headers ── */
.section-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 16px; }
.section-title { font-size: 16px; font-weight: 700; }
h1.page-title { font-size: 22px; font-weight: 700; margin-bottom: 4px; }
.page-subtitle { font-size: 14px; color: var(--text-muted); margin-bottom: 24px; }

/* ── Auth Pages ── */
.auth-wrapper {
  min-height: 100vh;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
  padding: 20px;
}
.auth-card {
  background: white;
  border-radius: 20px;
  padding: 40px 32px;
  width: 100%; max-width: 420px;
  box-shadow: var(--shadow-lg);
}
.auth-logo { text-align: center; margin-bottom: 28px; }
.auth-logo-text { font-size: 24px; font-weight: 800; color: var(--primary); }
.auth-title { font-size: 20px; font-weight: 700; margin-bottom: 4px; }
.auth-subtitle { font-size: 14px; color: var(--text-muted); margin-bottom: 24px; }
.auth-footer { text-align: center; margin-top: 20px; font-size: 14px; color: var(--text-muted); }
.auth-footer a { color: var(--primary); text-decoration: none; font-weight: 600; }

/* ── Divider ── */
.divider { border: none; border-top: 1px solid var(--border); margin: 20px 0; }

/* ── Empty State ── */
.empty-state {
  text-align: center;
  padding: 48px 24px;
  color: var(--text-muted);
}
.empty-state-icon { font-size: 48px; margin-bottom: 16px; }
.empty-state-title { font-size: 16px; font-weight: 600; color: var(--text); margin-bottom: 8px; }
.empty-state p { font-size: 14px; margin-bottom: 20px; }

/* ── Icon font wrapper ── */
.icon { width: 20px; height: 20px; display: inline-block; vertical-align: middle; }

/* ── Notify days checkboxes ── */
.day-pills { display: flex; flex-wrap: wrap; gap: 8px; }
.day-pill input[type=checkbox] { display: none; }
.day-pill label {
  padding: 6px 14px;
  border-radius: 20px;
  border: 1.5px solid var(--border);
  font-size: 13px; font-weight: 600;
  cursor: pointer;
  transition: all .15s;
  user-select: none;
}
.day-pill input:checked + label { background: var(--primary); color: white; border-color: var(--primary); }

/* ── Bottom Nav (mobile) ── */
.bottom-nav {
  display: none;
  position: fixed; bottom: 0; left: 0; right: 0;
  background: var(--bg-card);
  border-top: 1px solid var(--border);
  padding: 8px 0 calc(8px + env(safe-area-inset-bottom));
  z-index: 100;
  grid-template-columns: repeat(4, 1fr);
}
.bottom-nav a {
  display: flex; flex-direction: column; align-items: center; gap: 2px;
  text-decoration: none;
  color: var(--text-muted);
  font-size: 11px; font-weight: 500;
  padding: 4px;
  transition: color .15s;
}
.bottom-nav a.active, .bottom-nav a:hover { color: var(--primary); }
.bottom-nav svg { width: 22px; height: 22px; }

/* ── Responsive ── */
@media (max-width: 640px) {
  .topbar-nav { display: none; }
  .bottom-nav { display: grid; }
  .main-content { padding: 16px 12px 80px; }
  .form-row { grid-template-columns: 1fr; }
  .card { padding: 16px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  h1.page-title { font-size: 20px; }
  .reminder-card { padding: 12px 14px; gap: 12px; }
}

/* ── Util ── */
.text-muted { color: var(--text-muted); }
.text-small { font-size: 13px; }
.text-center { text-align: center; }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mb-2 { margin-bottom: 16px; }
.flex { display: flex; align-items: center; }
.gap-2 { gap: 8px; }
.gap-3 { gap: 16px; }
.justify-between { justify-content: space-between; }
.flex-1 { flex: 1; }
.w-full { width: 100%; }