/**
 * css/app.css — Styles de l'application Eleo Bank
 *
 * Organisation :
 *   1. Variables CSS (couleurs, espacements)
 *   2. Reset & base
 *   3. Composants réutilisables (boutons, inputs, modals...)
 *   4. Layout (header, nav, pages)
 *   5. Composants métier (balance card, transactions, goals...)
 *   6. Animations
 */

/* ═══════════════════════════════════════════════════════════════
   1. VARIABLES CSS
═══════════════════════════════════════════════════════════════ */
:root {
  /* Couleurs principales */
  --color-primary:      #667eea;
  --color-primary-dark: #764ba2;
  --color-accent:       #f093fb;

  /* Gradient principal (utilisé partout) */
  --gradient-main: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 50%, var(--color-accent) 100%);
  --gradient-card: linear-gradient(135deg, var(--color-primary), var(--color-accent));

  /* Couleurs sémantiques */
  --color-income:   #4ECDC4;
  --color-expense:  #FF6B9D;
  --color-success:  #2a9d8f;
  --color-warning:  #F39C12;
  --color-danger:   #e74c3c;
  --color-pending:  #FFB347;

  /* Neutres */
  --color-text:         #333;
  --color-text-light:   #999;
  --color-text-muted:   #bbb;
  --color-bg:           #fafafa;
  --color-border:       #eee;
  --color-white:        #fff;

  /* Espacements */
  --space-xs:  4px;
  --space-sm:  8px;
  --space-md:  12px;
  --space-lg:  16px;
  --space-xl:  20px;
  --space-2xl: 28px;

  /* Bordures */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-2xl: 24px;
  --radius-full: 9999px;

  /* Ombres */
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 20px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 30px rgba(0,0,0,0.15);
  --shadow-primary: 0 6px 20px rgba(102,126,234,0.4);
}

/* ═══════════════════════════════════════════════════════════════
   2. RESET & BASE
═══════════════════════════════════════════════════════════════ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Nunito', system-ui, sans-serif;
  color: var(--color-text);
  background: #f0f0f0;
  line-height: 1.5;
}

::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: #f1f1f1; border-radius: 3px; }
::-webkit-scrollbar-thumb { background: #ccc; border-radius: 3px; }

/* ═══════════════════════════════════════════════════════════════
   3. COMPOSANTS RÉUTILISABLES
═══════════════════════════════════════════════════════════════ */

/* ── Boutons ── */
.btn {
  border: none;
  border-radius: var(--radius-lg);
  font-family: inherit;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.btn-primary {
  background: var(--gradient-main);
  color: var(--color-white);
  padding: 12px 24px;
  font-size: 15px;
}
.btn-primary:hover  { transform: translateY(-2px); box-shadow: var(--shadow-primary); }
.btn-primary:active { transform: translateY(0); }
.btn-primary:disabled { opacity: 0.6; cursor: not-allowed; transform: none; }

.btn-secondary {
  background: #f5f0ff;
  color: var(--color-primary);
  padding: 10px 20px;
  font-size: 14px;
}
.btn-secondary:hover { background: #ede5ff; }

.btn-sm { padding: 6px 14px !important; font-size: 12px !important; border-radius: var(--radius-sm) !important; }

.btn-approve {
  background: var(--color-income);
  color: var(--color-white);
  border: none;
  border-radius: var(--radius-sm);
  padding: 3px 10px;
  cursor: pointer;
  font-weight: 700;
  font-size: 11px;
  font-family: inherit;
  margin-top: var(--space-xs);
}

/* ── Inputs ── */
input, select {
  width: 100%;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 10px 14px;
  font-size: 14px;
  font-family: inherit;
  outline: none;
  background: var(--color-white);
  transition: border-color 0.2s;
  color: var(--color-text);
}
input:focus, select:focus { border-color: var(--color-primary); }

/* ── Card ── */
.card {
  background: var(--color-white);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  box-shadow: var(--shadow-md);
}

/* ── Progress bar ── */
.progress-bar {
  height: 10px;
  border-radius: var(--radius-full);
  background: #f0e6ff;
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  border-radius: var(--radius-full);
  background: var(--gradient-card);
  transition: width 0.8s ease;
}

/* ── Badge pill ── */
.badge-pill {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-size: 12px;
  font-weight: 700;
}

/* ── Chip (tag catégorie) ── */
.chip {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  font-size: 11px;
  font-weight: 700;
}

/* ── Filter buttons ── */
.filter-btn {
  padding: 6px 14px;
  border-radius: var(--radius-full);
  border: none;
  background: #f5f0ff;
  color: var(--color-primary);
  font-weight: 700;
  font-size: 12px;
  cursor: pointer;
  font-family: inherit;
  transition: all 0.15s;
}
.filter-btn.active {
  background: var(--gradient-main);
  color: var(--color-white);
}

/* ── Modal ── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.45);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
  padding: var(--space-xl);
}
.modal {
  background: var(--color-white);
  border-radius: var(--radius-2xl);
  padding: var(--space-2xl);
  width: 100%;
  max-width: 420px;
  animation: fadeIn 0.2s ease;
}

/* ── Toast ── */
.toast {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 999;
  color: var(--color-white);
  padding: 12px 20px;
  border-radius: var(--radius-lg);
  font-weight: 700;
  font-size: 14px;
  box-shadow: var(--shadow-lg);
  animation: fadeIn 0.3s ease;
  pointer-events: none;
}
.toast--success { background: var(--gradient-main); }
.toast--error   { background: var(--color-danger); }

/* ── Type selector (dépense/revenu) ── */
.type-btn {
  flex: 1;
  padding: 10px;
  border-radius: var(--radius-md);
  font-weight: 700;
  cursor: pointer;
  font-size: 14px;
  font-family: inherit;
  transition: all 0.15s;
  border: 2px solid var(--color-border);
  background: var(--color-white);
  color: var(--color-text-light);
}
.type-btn.active {
  border-color: var(--color-primary);
  background: #f5f0ff;
  color: var(--color-primary);
}

/* ═══════════════════════════════════════════════════════════════
   4. LAYOUT
═══════════════════════════════════════════════════════════════ */


/* ── Écrans auth (login, register, setup) ── */
#login-screen, #register-screen, #setup-screen {
  min-height: 100vh;
  display: none;
  align-items: center;
  justify-content: center;
  background: var(--gradient-main);
  padding: var(--space-xl);
}

.login-card {
  background: var(--color-white);
  border-radius: 28px;
  padding: 36px 28px;
  width: 100%;
  max-width: 380px;
  text-align: center;
  box-shadow: 0 20px 60px rgba(0,0,0,0.2);
}
.login-title {
  font-size: 28px;
  font-weight: 900;
  margin-bottom: 6px;
  background: var(--gradient-card);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.login-error {
  background: #fff0f0;
  color: var(--color-danger);
  border-radius: var(--radius-md);
  padding: 10px 14px;
  margin-bottom: 14px;
  font-size: 13px;
  font-weight: 700;
}

/* ── App shell ── */
#app-screen {
  display: none;
  min-height: 100vh;
  background: var(--gradient-main);
  padding: 20px 10px;
  justify-content: center;
  align-items: flex-start;
}
#app-screen.visible { display: flex; }

.app-inner {
  width: 100%;
  max-width: 480px;
}

/* ── Header ── */
.app-header {
  background: rgba(255,255,255,0.15);
  backdrop-filter: blur(20px);
  border-radius: var(--radius-2xl);
  padding: var(--space-lg) var(--space-xl);
  margin-bottom: var(--space-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
  border: 1px solid rgba(255,255,255,0.3);
}
.header-avatar {
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: var(--color-white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  box-shadow: var(--shadow-sm);
  flex-shrink: 0;
}
.header-xp-bar-wrap {
  width: 80px;
  height: 6px;
  border-radius: var(--radius-full);
  background: rgba(255,255,255,0.3);
  margin-top: 3px;
  overflow: hidden;
}
.header-xp-bar {
  height: 100%;
  background: var(--color-white);
  border-radius: var(--radius-full);
  transition: width 0.8s;
}
.btn-logout {
  background: rgba(255,255,255,0.2);
  border: none;
  border-radius: var(--radius-sm);
  color: var(--color-white);
  font-size: 11px;
  padding: 3px 8px;
  cursor: pointer;
  font-weight: 700;
  font-family: inherit;
}

/* ── Alerte en attente ── */
.pending-alert {
  background: #fff3cd;
  border-radius: var(--radius-lg);
  padding: 12px var(--space-lg);
  margin-bottom: var(--radius-md);
  border: 2px solid var(--color-pending);
  display: none;
  align-items: center;
  gap: 10px;
}
.pending-alert.visible { display: flex; }
.btn-goto-pending {
  background: none;
  border: none;
  color: #e67e22;
  font-weight: 700;
  font-size: 12px;
  cursor: pointer;
  padding: 0;
  margin-top: 2px;
  font-family: inherit;
}

/* ── Pages ── */
.page { display: none; animation: fadeIn 0.3s ease; }
.page.active { display: block; }

/* ── Navigation ── */
.app-nav {
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(20px);
  border-radius: var(--radius-2xl);
  padding: 10px 8px;
  display: flex;
  justify-content: space-around;
  box-shadow: var(--shadow-lg);
  margin-top: var(--space-lg);
}
.tab-btn {
  border: none;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  padding: 8px 12px;
  border-radius: 14px;
  transition: all 0.2s;
  background: transparent;
  font-family: inherit;
}
.tab-btn.active {
  background: var(--gradient-main);
  color: var(--color-white) !important;
  transform: translateY(-3px);
  box-shadow: var(--shadow-primary);
}
.tab-btn:not(.active):hover { background: #f5f0ff; }
.tab-label {
  font-size: 11px;
  font-weight: 700;
  color: var(--color-text-light);
}
.tab-btn.active .tab-label { color: var(--color-white); }

/* ═══════════════════════════════════════════════════════════════
   5. COMPOSANTS MÉTIER
═══════════════════════════════════════════════════════════════ */

/* ── Balance card ── */
.balance-card {
  background: var(--gradient-card);
  border-radius: var(--radius-xl);
  padding: 24px var(--space-xl);
  margin-bottom: 18px;
  position: relative;
  overflow: hidden;
}
.balance-card::before {
  content: '';
  position: absolute;
  top: -20px; right: -20px;
  width: 120px; height: 120px;
  border-radius: 60px;
  background: rgba(255,255,255,0.1);
}
.balance-card::after {
  content: '';
  position: absolute;
  bottom: -30px; left: -10px;
  width: 100px; height: 100px;
  border-radius: 50px;
  background: rgba(255,255,255,0.08);
}
.balance-amount {
  color: var(--color-white);
  font-size: 40px;
  font-weight: 900;
  letter-spacing: -1px;
  position: relative;
  z-index: 1;
}

/* ── Stat cards (revenus/dépenses) ── */
.stat-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--radius-md);
  margin-bottom: 18px;
}
.stat-card {
  border-radius: var(--radius-lg);
  padding: 14px var(--space-lg);
}
.stat-card--income  { background: #e8fdf9; }
.stat-card--expense { background: #fff0f6; }

/* ── Transaction item ── */
.tx-item {
  display: flex;
  align-items: center;
  gap: var(--radius-md);
  padding: var(--radius-md);
  border-radius: 14px;
  border: 2px solid transparent;
  margin-bottom: var(--space-xs);
  background: var(--color-bg);
  transition: background 0.15s;
}
.tx-item:hover { background: #f0f0f0; }
.tx-item--pending { border-color: var(--color-pending); opacity: 0.85; }
.tx-icon {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  flex-shrink: 0;
}

/* ── Goal card ── */
.goal-card {
  background: var(--color-bg);
  border-radius: 18px;
  padding: var(--space-lg);
  border: 2px solid var(--color-border);
  margin-bottom: 14px;
  transition: border-color 0.3s;
}
.goal-card--completed { border-color: var(--color-income); }

/* ── Quiz item ── */
.quiz-item {
  background: var(--color-bg);
  border-radius: var(--radius-lg);
  padding: 14px var(--space-lg);
  border: 2px solid var(--color-border);
  display: flex;
  align-items: center;
  gap: var(--radius-md);
  margin-bottom: 10px;
}
.quiz-item--done { background: #e8fdf9; border-color: var(--color-income); }
.quiz-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  flex-shrink: 0;
}
.quiz-icon--todo { background: var(--gradient-main); }
.quiz-icon--done { background: var(--color-income); }

/* ── Quiz answer buttons ── */
.quiz-option {
  width: 100%;
  background: var(--color-bg);
  border: 2px solid var(--color-border);
  color: var(--color-text);
  border-radius: 14px;
  padding: 12px var(--space-lg);
  text-align: left;
  cursor: pointer;
  font-weight: 600;
  font-size: 14px;
  font-family: inherit;
  transition: all 0.2s;
  display: block;
  margin-bottom: 10px;
}
.quiz-option:disabled { cursor: default; }
.quiz-option--correct { background: #e8fdf9 !important; border-color: var(--color-income) !important; color: var(--color-success) !important; }
.quiz-option--wrong   { background: #ffe5e5 !important; border-color: #ff6b6b !important; color: #c0392b !important; }

/* ── Badge grid ── */
.badges-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-bottom: var(--space-xl);
}
.badge-card {
  border-radius: 14px;
  padding: 12px 8px;
  text-align: center;
}
.badge-card--locked   { background: #f5f5f5; opacity: 0.5; }
.badge-card--unlocked { background: #f5f0ff; }

/* ── Budget savings rate ── */
.savings-rate-card {
  border-radius: 14px;
  padding: 14px;
  margin-bottom: var(--space-xl);
  border: 2px solid;
}

/* ═══════════════════════════════════════════════════════════════
   6. ANIMATIONS
═══════════════════════════════════════════════════════════════ */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}