/* ═══════════════════════════════════════════════
   Cash In/Out System — Mobile-First Production CSS
   ═══════════════════════════════════════════════ */

/* ---------- Google Font ---------- */
@import url('https://fonts.googleapis.com/css2?family=Tajawal:wght@400;500;700;800&display=swap');

/* ---------- Design Tokens (Light Mode) ---------- */
:root {
  --bg:          #f5f7fa;
  --bg-surface:  #eef1f5;
  --bg-card:     #ffffff;
  --bg-elevated: #f0f2f5;
  --border:      rgba(0,0,0,.08);
  --border-hover:rgba(0,0,0,.15);

  --ink:         #1a202c;
  --ink-muted:   #64748b;
  --ink-subtle:  #94a3b8;

  --teal:        #0d9488;
  --teal-dim:    rgba(13,148,136,.08);
  --teal-glow:   rgba(13,148,136,.18);

  --emerald:     #059669;
  --emerald-dim: rgba(5,150,105,.07);
  --emerald-ink: #047857;

  --rose:        #e11d48;
  --rose-dim:    rgba(225,29,72,.06);
  --rose-ink:    #be123c;

  --blue:        #2563eb;
  --blue-dim:    rgba(37,99,235,.06);
  --blue-ink:    #1d4ed8;

  --amber:       #d97706;
  --amber-dim:   rgba(217,119,6,.07);
  --amber-ink:   #b45309;

  --danger:      #dc2626;

  --radius-sm:   10px;
  --radius:      14px;
  --radius-lg:   20px;
  --radius-xl:   24px;

  --shadow:      0 4px 24px rgba(0,0,0,.06);
  --shadow-lg:   0 8px 40px rgba(0,0,0,.10);

  --transition:  .22s cubic-bezier(.4,0,.2,1);
}

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

html {
  font-size: 16px;
  -webkit-tap-highlight-color: transparent;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: 'Tajawal', 'Segoe UI', system-ui, sans-serif;
  background: var(--bg);
  color: var(--ink);
  min-height: 100dvh;
  line-height: 1.6;
  overflow-x: hidden;
  padding-bottom: calc(70px + env(safe-area-inset-bottom, 16px));
}

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

img { max-width: 100%; display: block; }

/* ---------- Ambient Background ---------- */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(ellipse 600px 400px at 10% 0%, rgba(13,148,136,.06) 0%, transparent 70%),
    radial-gradient(ellipse 500px 500px at 90% 100%, rgba(225,29,72,.04) 0%, transparent 70%);
  pointer-events: none;
}

/* ---------- Layout ---------- */
.app-container {
  max-width: 540px;
  margin: 0 auto;
  padding: 0 16px;
}

@media (min-width: 768px) {
  .app-container { max-width: 680px; padding: 0 24px; }
}

/* ---------- Top Header ---------- */
.top-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,.88);
  backdrop-filter: blur(20px) saturate(1.4);
  -webkit-backdrop-filter: blur(20px) saturate(1.4);
  border-bottom: 1px solid var(--border);
  padding: 14px 16px;
}

.top-header-inner {
  max-width: 540px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

@media (min-width: 768px) {
  .top-header-inner { max-width: 680px; }
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand-icon {
  width: 34px;
  height: 34px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--teal), #14b8a6);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 16px var(--teal-glow);
}

.brand-icon svg { width: 20px; height: 20px; }

.brand-text {
  font-size: .95rem;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: -.01em;
}

.user-badge {
  font-size: .78rem;
  color: var(--ink-muted);
  background: var(--bg-elevated);
  padding: 5px 12px;
  border-radius: 20px;
  border: 1px solid var(--border);
}

/* ---------- Bottom Navigation ---------- */
.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 200;
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(20px) saturate(1.4);
  -webkit-backdrop-filter: blur(20px) saturate(1.4);
  border-top: 1px solid var(--border);
  padding: 6px 0 calc(6px + env(safe-area-inset-bottom, 0px));
}

.bottom-nav-inner {
  max-width: 540px;
  margin: 0 auto;
  display: flex;
  justify-content: space-around;
  align-items: center;
}

@media (min-width: 768px) {
  .bottom-nav-inner { max-width: 680px; }
}

.nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  padding: 6px 12px;
  border-radius: var(--radius);
  color: var(--ink-muted);
  font-size: .68rem;
  font-weight: 500;
  transition: color var(--transition), background var(--transition);
  cursor: pointer;
  border: none;
  background: none;
  text-decoration: none;
  -webkit-appearance: none;
}

.nav-item svg { width: 22px; height: 22px; opacity: .6; transition: opacity var(--transition); }

.nav-item:hover,
.nav-item.active {
  color: var(--teal);
  background: var(--teal-dim);
}

.nav-item:hover svg,
.nav-item.active svg { opacity: 1; }

.nav-item--cash-in:hover,
.nav-item--cash-in.active { color: var(--emerald); background: var(--emerald-dim); }

.nav-item--cash-out:hover,
.nav-item--cash-out.active { color: var(--rose); background: var(--rose-dim); }

.logout-form { margin: 0; }

/* ---------- Page Content ---------- */
.page-content {
  padding-top: 20px;
  animation: fadeUp .4s ease both;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(14px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ---------- Cards ---------- */
.card {
  background: #fff;
  border: 1.5px solid #e2e8f0;
  border-radius: var(--radius-lg);
  padding: 18px;
  margin-bottom: 14px;
  box-shadow: var(--shadow);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.card:hover {
  border-color: var(--border-hover);
}

.card-glass {
  background: rgba(255,255,255,.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1.5px solid #e2e8f0;
}

/* ---------- Stats Grid ---------- */
.stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 18px;
}

.stat-card {
  border-radius: var(--radius-lg);
  padding: 18px;
  border: 1.5px solid;
  transition: transform var(--transition), box-shadow var(--transition);
}

.stat-card:active { transform: scale(.97); }

.stat-card--in  { background: #ecfdf5; border-color: #a7f3d0; }
.stat-card--out { background: #fff1f2; border-color: #fecdd3; }
.stat-card--diff{ background: #eff6ff; border-color: #bfdbfe; }
.stat-card--rem { background: #fffbeb; border-color: #fde68a; }

.stat-label {
  font-size: .88rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.stat-card--in  .stat-label { color: #047857; }
.stat-card--out .stat-label { color: #be123c; }
.stat-card--diff .stat-label{ color: #1d4ed8; }
.stat-card--rem .stat-label { color: #b45309; }

.stat-value {
  font-size: 1.5rem;
  font-weight: 800;
  color: #1a202c;
  letter-spacing: -.02em;
}

.stat-currency {
  font-size: .82rem;
  font-weight: 600;
  color: #475569;
  margin-right: 4px;
}

/* ---------- Section Titles ---------- */
.section-title {
  font-size: 1rem;
  font-weight: 800;
  color: #1e293b;
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.section-title::before {
  content: '';
  width: 3px;
  height: 16px;
  border-radius: 2px;
  background: var(--teal);
}

/* ---------- Transaction Items ---------- */
.tx-list { display: flex; flex-direction: column; gap: 10px; margin-bottom: 18px; }

.tx-item {
  background: #fff;
  border: 1.5px solid #e2e8f0;
  border-radius: var(--radius);
  padding: 14px 16px;
  transition: border-color var(--transition), transform var(--transition);
}

.tx-item:active { transform: scale(.985); }

.tx-item:hover { border-color: var(--border-hover); }

.tx-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.tx-user {
  font-size: .95rem;
  font-weight: 800;
  color: #1a202c;
}

.tx-badge {
  font-size: .85rem;
  font-weight: 800;
  padding: 5px 12px;
  border-radius: 20px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.tx-badge--in  { background: #d1fae5; color: #047857; }
.tx-badge--out { background: #ffe4e6; color: #be123c; }

.tx-meta {
  font-size: .82rem;
  font-weight: 500;
  color: #64748b;
  margin-top: 6px;
}

.tx-note {
  font-size: .82rem;
  color: var(--ink-muted);
  margin-top: 6px;
  padding-top: 6px;
  border-top: 1px solid var(--border);
  white-space: pre-wrap;
}

.tx-receipt-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-top: 8px;
  font-size: .78rem;
  font-weight: 600;
  color: var(--teal);
  padding: 4px 10px;
  border-radius: 8px;
  background: var(--teal-dim);
  transition: background var(--transition);
}

.tx-receipt-link:hover { background: var(--teal-glow); }

.category-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.category-actions form { margin: 0; }

.category-actions--footer { margin-top: 18px; }

.btn-inline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  padding: 8px 12px;
  font-size: .82rem;
  font-weight: 700;
  font-family: inherit;
  text-decoration: none;
  cursor: pointer;
  background: #fff;
}

.btn-inline--edit { color: var(--teal); }

.btn-inline--delete {
  color: var(--danger);
  border-color: #fecdd3;
}

.btn-inline--disabled {
  color: var(--ink-muted);
  background: var(--bg-elevated);
  cursor: not-allowed;
}

/* ---------- Filters ---------- */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 18px;
}

.filter-bar select,
.filter-bar input[type="date"] {
  flex: 1;
  min-width: 120px;
  background: #fff;
  border: 1.5px solid #d1d5db;
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  font-size: .85rem;
  color: #1a202c;
  font-family: inherit;
  transition: border-color var(--transition);
  appearance: auto;
  -webkit-appearance: auto;
}

.filter-bar select:focus,
.filter-bar input[type="date"]:focus {
  outline: none;
  border-color: var(--teal);
  box-shadow: 0 0 0 3px var(--teal-dim);
}

.filter-btn {
  background: #0d9488;
  color: #fff;
  border: 1px solid #0d9488;
  border-radius: var(--radius-sm);
  padding: 10px 20px;
  font-size: .85rem;
  font-weight: 700;
  font-family: inherit;
  cursor: pointer;
  transition: background var(--transition), box-shadow var(--transition);
  width: 100%;
}

.filter-btn:hover {
  background: #0f766e;
  box-shadow: 0 2px 12px rgba(13,148,136,.25);
}

/* ---------- Forms ---------- */
.form-group { margin-bottom: 18px; }

.form-label {
  display: block;
  font-size: .82rem;
  font-weight: 600;
  color: #374151;
  margin-bottom: 8px;
}

.form-input,
.form-group input[type="number"],
.form-group input[type="text"],
.form-group input[type="password"],
.form-group input[type="file"],
.form-group select,
.form-group textarea {
  width: 100%;
  background: #fff;
  border: 1.5px solid #d1d5db;
  border-radius: var(--radius);
  padding: 14px 16px;
  font-size: 1rem;
  color: #1a202c;
  font-family: inherit;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.form-input::placeholder,
.form-group input::placeholder {
  color: #94a3b8;
}

.form-input:focus,
.form-group input:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--teal);
  box-shadow: 0 0 0 3px var(--teal-dim);
}

.form-hint {
  font-size: .75rem;
  color: var(--ink-subtle);
  margin-top: 6px;
}

.form-error {
  font-size: .8rem;
  color: var(--danger);
  margin-top: 6px;
}

.check-row {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 18px;
  font-size: .9rem;
  font-weight: 700;
  color: var(--ink);
}

.contributor-details {
  margin-top: 8px;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--teal-dim);
  color: var(--ink);
  font-size: .78rem;
  line-height: 1.6;
}

.month-grid ul {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
  padding: 0;
  margin: 0;
}

.month-grid li label {
  display: flex;
  align-items: center;
  gap: 8px;
  min-height: 42px;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: #fff;
  font-weight: 700;
}

@media (min-width: 640px) {
  .month-grid ul { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 14px 24px;
  border-radius: var(--radius);
  font-size: 1rem;
  font-weight: 700;
  font-family: inherit;
  cursor: pointer;
  border: none;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
}

.btn:active { transform: scale(.97); }

.btn-primary {
  background: linear-gradient(135deg, #0d9488, #0f766e);
  color: #fff;
  box-shadow: 0 4px 16px rgba(13,148,136,.3);
}

.btn-primary:hover {
  box-shadow: 0 6px 24px rgba(13,148,136,.4);
}

.btn-emerald {
  background: linear-gradient(135deg, #059669, #047857);
  color: #fff;
  box-shadow: 0 4px 16px rgba(5,150,105,.3);
}

.btn-rose {
  background: linear-gradient(135deg, #e11d48, #be123c);
  color: #fff;
  box-shadow: 0 4px 16px rgba(225,29,72,.3);
}

.btn-ghost {
  background: var(--bg-elevated);
  color: var(--ink-muted);
  border: 1px solid var(--border);
}

.btn-ghost:hover { background: var(--bg-card); border-color: var(--border-hover); }

.pwa-install-button {
  position: fixed;
  inset-inline-end: 16px;
  bottom: calc(84px + env(safe-area-inset-bottom, 0px));
  z-index: 210;
  min-height: 44px;
  padding: 10px 18px;
  border: 0;
  border-radius: var(--radius);
  background: var(--teal);
  color: #fff;
  box-shadow: var(--shadow);
  font: 700 .9rem/1.4 'Tajawal', 'Segoe UI', system-ui, sans-serif;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition), opacity var(--transition);
}

.pwa-install-button[hidden] { display: none; }
.pwa-install-button:hover { box-shadow: 0 6px 24px var(--teal-glow); }
.pwa-install-button:active { transform: scale(.97); }
.pwa-install-button:disabled { cursor: wait; opacity: .7; }
.pwa-install-button:focus-visible { outline: 3px solid var(--teal-glow); outline-offset: 3px; }

/* ---------- Auth Card ---------- */
.auth-wrapper {
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px 16px;
}

.auth-card {
  width: 100%;
  max-width: 400px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 32px 24px;
  box-shadow: var(--shadow-lg);
  animation: fadeUp .5s ease both;
}

.auth-logo {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  background: linear-gradient(135deg, var(--teal), #14b8a6);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  box-shadow: 0 0 24px var(--teal-glow);
}

.auth-logo svg { width: 30px; height: 30px; }

.auth-title {
  text-align: center;
  font-size: 1.4rem;
  font-weight: 800;
  margin-bottom: 4px;
  letter-spacing: -.02em;
}

.auth-subtitle {
  text-align: center;
  font-size: .88rem;
  color: var(--ink-muted);
  margin-bottom: 28px;
}

/* ---------- Messages / Alerts ---------- */
.alert {
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  font-size: .85rem;
  margin-bottom: 14px;
  border: 1px solid;
}

.alert-info   { background: var(--blue-dim); border-color: rgba(96,165,250,.2); color: var(--blue-ink); }
.alert-error  { background: var(--rose-dim); border-color: rgba(251,113,133,.2); color: var(--rose-ink); }

/* ---------- Empty State ---------- */
.empty-state {
  text-align: center;
  padding: 40px 20px;
  color: var(--ink-subtle);
}

.empty-state svg { width: 48px; height: 48px; margin: 0 auto 12px; opacity: .3; }
.empty-state p { font-size: .9rem; }

/* ---------- Page Title ---------- */
.page-title {
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -.02em;
  margin-bottom: 18px;
}

/* ---------- Logout Button in Nav ---------- */
.logout-form { display: contents; }

.nav-item--logout {
  color: var(--rose);
}

.nav-item--logout:hover {
  background: var(--rose-dim);
}

/* ---------- Desktop Enhancements ---------- */
@media (min-width: 768px) {
  .stats-grid { grid-template-columns: repeat(4, 1fr); }
  .filter-bar { flex-wrap: nowrap; }
  .filter-btn { width: auto; }
}

/* ---------- Safe Area (iPhone notch) ---------- */
@supports (padding: env(safe-area-inset-bottom)) {
  .bottom-nav {
    padding-bottom: calc(6px + env(safe-area-inset-bottom));
  }
}

/* ---------- Print ---------- */
@media print {
  .top-header, .bottom-nav { display: none; }
  body { padding-bottom: 0; background: #fff; color: #000; }
  .card, .stat-card, .tx-item { border-color: #ccc; box-shadow: none; background: #fff; }
}