:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-light: #dbeafe;
  --success: #16a34a;
  --success-light: #dcfce7;
  --danger: #dc2626;
  --danger-light: #fee2e2;
  --warning: #d97706;
  --warning-light: #fef3c7;
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;
  --radius: 8px;
  --radius-lg: 12px;
  --shadow: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.07), 0 2px 4px rgba(0,0,0,0.05);
  --shadow-lg: 0 10px 15px rgba(0,0,0,0.1), 0 4px 6px rgba(0,0,0,0.05);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--gray-50);
  color: var(--gray-800);
  line-height: 1.5;
  font-size: 15px;
}

a {
  color: var(--primary);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* --- LAYOUT --- */
.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 20px;
}

.container-sm {
  max-width: 600px;
  margin: 0 auto;
  padding: 0 20px;
}

/* --- NAV --- */
nav {
  background: #fff;
  border-bottom: 1px solid var(--gray-200);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
  max-width: 960px;
  margin: 0 auto;
  padding: 0 20px;
}

.nav-logo {
  font-weight: 700;
  font-size: 18px;
  color: var(--primary);
  text-decoration: none;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-links a {
  color: var(--gray-600);
  text-decoration: none;
  padding: 6px 12px;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 500;
  transition: background 0.15s, color 0.15s;
}

.nav-links a:hover {
  background: var(--gray-100);
  color: var(--gray-900);
  text-decoration: none;
}

.nav-links a.active {
  background: var(--primary-light);
  color: var(--primary);
}

.lang-switch {
  display: flex;
  gap: 2px;
  background: var(--gray-100);
  border-radius: var(--radius);
  padding: 2px;
}

.lang-btn {
  border: none;
  background: none;
  font-family: inherit;
  font-size: 12px;
  font-weight: 700;
  color: var(--gray-500);
  padding: 4px 8px;
  border-radius: calc(var(--radius) - 2px);
  cursor: pointer;
}

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

/* --- BUTTONS --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 9px 18px;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all 0.15s;
  text-decoration: none;
  white-space: nowrap;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

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

.btn-primary:hover:not(:disabled) {
  background: var(--primary-dark);
  text-decoration: none;
  color: #fff;
}

.btn-secondary {
  background: var(--gray-100);
  color: var(--gray-700);
}

.btn-secondary:hover:not(:disabled) {
  background: var(--gray-200);
  text-decoration: none;
  color: var(--gray-700);
}

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

.btn-success:hover:not(:disabled) {
  background: #15803d;
  text-decoration: none;
  color: #fff;
}

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

.btn-danger:hover:not(:disabled) {
  background: #b91c1c;
  text-decoration: none;
  color: #fff;
}

.btn-outline {
  background: transparent;
  color: var(--primary);
  border: 1.5px solid var(--primary);
}

.btn-outline:hover:not(:disabled) {
  background: var(--primary-light);
  text-decoration: none;
}

.btn-sm {
  padding: 6px 12px;
  font-size: 13px;
}

.btn-lg {
  padding: 12px 24px;
  font-size: 16px;
  border-radius: var(--radius-lg);
}

.btn-block {
  width: 100%;
}

/* --- CARDS --- */
.card {
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow);
}

.card-sm {
  padding: 16px;
}

/* --- FORMS --- */
.form-group {
  margin-bottom: 20px;
}

label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--gray-700);
  margin-bottom: 6px;
}

input[type="text"],
input[type="email"],
input[type="url"],
input[type="number"],
input[type="date"],
select,
textarea {
  width: 100%;
  padding: 9px 12px;
  border: 1.5px solid var(--gray-300);
  border-radius: var(--radius);
  font-size: 14px;
  color: var(--gray-800);
  background: #fff;
  transition: border-color 0.15s, box-shadow 0.15s;
  font-family: inherit;
}

input:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

textarea {
  resize: vertical;
  min-height: 80px;
}

.form-hint {
  font-size: 12px;
  color: var(--gray-500);
  margin-top: 4px;
}

.form-error {
  font-size: 12px;
  color: var(--danger);
  margin-top: 4px;
}

/* checkbox / radio */
.checkbox-group {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 12px;
}

.checkbox-group input[type="checkbox"] {
  width: 16px;
  height: 16px;
  margin-top: 2px;
  flex-shrink: 0;
  accent-color: var(--primary);
  cursor: pointer;
}

.checkbox-group label {
  margin-bottom: 0;
  font-weight: 400;
  color: var(--gray-700);
  cursor: pointer;
  font-size: 14px;
}

/* --- BADGES --- */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
}

.badge-blue { background: var(--primary-light); color: var(--primary); }
.badge-green { background: var(--success-light); color: var(--success); }
.badge-yellow { background: var(--warning-light); color: var(--warning); }
.badge-red { background: var(--danger-light); color: var(--danger); }
.badge-gray { background: var(--gray-100); color: var(--gray-600); }

/* --- PROGRESS BAR --- */
.progress {
  background: var(--gray-200);
  border-radius: 999px;
  height: 8px;
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  background: var(--primary);
  border-radius: 999px;
  transition: width 0.3s ease;
}

.progress-bar.full {
  background: var(--success);
}

/* --- ALERTS --- */
.alert {
  padding: 12px 16px;
  border-radius: var(--radius);
  font-size: 14px;
  margin-bottom: 16px;
}

.alert-info { background: var(--primary-light); color: var(--primary-dark); }
.alert-success { background: var(--success-light); color: var(--success); }
.alert-danger { background: var(--danger-light); color: var(--danger); }
.alert-warning { background: var(--warning-light); color: var(--warning); }

/* --- PAGE HEADER --- */
.page-header {
  padding: 32px 0 24px;
}

.page-header h1 {
  font-size: 24px;
  font-weight: 700;
  color: var(--gray-900);
}

.page-header p {
  color: var(--gray-500);
  margin-top: 4px;
}

/* --- EMPTY STATE --- */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--gray-400);
}

.empty-state .icon {
  font-size: 48px;
  margin-bottom: 16px;
}

.empty-state h3 {
  font-size: 18px;
  color: var(--gray-600);
  margin-bottom: 8px;
}

.empty-state p {
  font-size: 14px;
  max-width: 320px;
  margin: 0 auto 20px;
}

/* --- GRID --- */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

@media (max-width: 640px) {
  .grid-2, .grid-3 {
    grid-template-columns: 1fr;
  }
}

/* --- DIVIDER --- */
.divider {
  border: none;
  border-top: 1px solid var(--gray-200);
  margin: 24px 0;
}

/* --- STAT --- */
.stat {
  text-align: center;
}

.stat .value {
  font-size: 28px;
  font-weight: 700;
  color: var(--gray-900);
}

.stat .label {
  font-size: 13px;
  color: var(--gray-500);
  margin-top: 2px;
}

/* --- APP CARD --- */
.app-card {
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  box-shadow: var(--shadow);
  transition: box-shadow 0.15s, border-color 0.15s;
}

.app-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--gray-300);
}

.app-card-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--gray-900);
}

.app-card-desc {
  font-size: 13px;
  color: var(--gray-500);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.app-card-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  font-size: 13px;
  color: var(--gray-500);
}

.app-card-progress {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.app-card-progress-text {
  display: flex;
  justify-content: space-between;
  font-size: 13px;
  color: var(--gray-600);
}

.apps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}

/* --- RELIABILITY BADGE --- */
.reliability {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 700;
  font-size: 20px;
}

.reliability.high { color: var(--success); }
.reliability.mid { color: var(--warning); }
.reliability.low { color: var(--danger); }

/* --- SPINNER --- */
.spinner {
  width: 20px;
  height: 20px;
  border: 2px solid var(--gray-200);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
  display: inline-block;
}

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

.loading-center {
  display: flex;
  justify-content: center;
  padding: 60px 0;
}

/* --- TOAST --- */
#toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toast-item {
  background: var(--gray-900);
  color: #fff;
  padding: 12px 18px;
  border-radius: var(--radius-lg);
  font-size: 14px;
  box-shadow: var(--shadow-lg);
  animation: slideIn 0.2s ease;
  max-width: 320px;
}

.toast-item.success { background: var(--success); }
.toast-item.error { background: var(--danger); }

@keyframes slideIn {
  from { transform: translateX(20px); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

/* --- MODAL --- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.4);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.modal {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 28px;
  max-width: 480px;
  width: 100%;
  box-shadow: var(--shadow-lg);
}

.modal h2 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
}

.modal p {
  color: var(--gray-600);
  font-size: 14px;
  margin-bottom: 20px;
}

.modal-actions {
  display: flex;
  gap: 10px;
  justify-content: flex-end;
}

/* --- TABS --- */
.tabs {
  display: flex;
  border-bottom: 2px solid var(--gray-200);
  margin-bottom: 24px;
  gap: 0;
}

.tab {
  padding: 10px 20px;
  font-size: 14px;
  font-weight: 600;
  color: var(--gray-500);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: color 0.15s, border-color 0.15s;
}

.tab.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
}

.tab:hover:not(.active) {
  color: var(--gray-700);
}

/* --- CHECKIN CARD --- */
.checkin-card {
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.checkin-day-indicator {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
}

.day-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--gray-200);
}

.day-dot.done { background: var(--success); }
.day-dot.today { background: var(--primary); }

/* --- RESPONSIVE --- */
@media (max-width: 640px) {
  .nav-links a span { display: none; }
  .page-header { padding: 20px 0 16px; }
  .card { padding: 16px; }
  .btn-lg { padding: 10px 20px; font-size: 15px; }
}