/* ===== VARIABLES ===== */
:root {
  --primary: #2563EB;
  --primary-dark: #1D4ED8;
  --primary-light: #EFF6FF;
  --secondary: #7C3AED;
  --success: #10B981;
  --warning: #F59E0B;
  --danger: #EF4444;
  --bg: #F8FAFC;
  --bg-card: #FFFFFF;
  --border: #E2E8F0;
  --border-focus: #2563EB;
  --text: #1E293B;
  --text-muted: #64748B;
  --text-light: #94A3B8;
  --shadow-sm: 0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.06);
  --shadow: 0 4px 6px -1px rgba(0,0,0,.1), 0 2px 4px -1px rgba(0,0,0,.06);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,.1), 0 4px 6px -2px rgba(0,0,0,.05);
  --shadow-xl: 0 20px 25px -5px rgba(0,0,0,.1), 0 10px 10px -5px rgba(0,0,0,.04);
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 16px;
  --transition: .2s ease;
}

/* ===== RESET ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  font-size: 16px;
  min-height: 100vh;
}
img, svg { display: block; max-width: 100%; }
button, input, select, textarea { font-family: inherit; }

/* ===== LAYOUT ===== */
.container {
  width: 100%;
  max-width: 720px;
  margin: 0 auto;
  padding: 0 16px;
}

/* ===== HEADER ===== */
.header {
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  max-width: 720px;
  margin: 0 auto;
}
.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
  color: var(--text);
}
.logo-icon {
  width: 34px;
  height: 34px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
}
.logo-text {
  font-weight: 700;
  font-size: 15px;
  line-height: 1.2;
}
.logo-text span { color: var(--primary); }
.badge-free {
  background: #DCFCE7;
  color: #16A34A;
  font-size: 11px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 20px;
  letter-spacing: .3px;
}

/* ===== HERO ===== */
.hero {
  padding: 40px 16px 32px;
  text-align: center;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  padding: 5px 12px;
  border-radius: 20px;
  margin-bottom: 16px;
}
.hero h1 {
  font-size: clamp(24px, 5vw, 36px);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 12px;
  letter-spacing: -.5px;
}
.hero h1 span {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-desc {
  color: var(--text-muted);
  font-size: 16px;
  max-width: 480px;
  margin: 0 auto 20px;
  line-height: 1.7;
}
.hero-features {
  display: flex;
  gap: 8px;
  justify-content: center;
  flex-wrap: wrap;
}
.hero-feature {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 13px;
  color: var(--text-muted);
  font-weight: 500;
}
.hero-feature svg { color: var(--success); flex-shrink: 0; }

/* ===== CARDS ===== */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  margin-bottom: 16px;
  overflow: hidden;
}
.card-header {
  padding: 18px 20px 14px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 10px;
}
.card-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  flex-shrink: 0;
}
.card-icon.blue { background: #EFF6FF; }
.card-icon.purple { background: #F5F3FF; }
.card-icon.green { background: #F0FDF4; }
.card-icon.orange { background: #FFF7ED; }
.card-icon.red { background: #FEF2F2; }
.card-title {
  font-weight: 700;
  font-size: 15px;
  color: var(--text);
}
.card-subtitle {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 1px;
}
.card-body { padding: 20px; }

/* ===== FORM ===== */
.form-grid {
  display: grid;
  gap: 16px;
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.form-row.triple {
  grid-template-columns: 1fr 1fr 1fr;
}
.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 4px;
}
.form-label .req { color: var(--danger); font-size: 11px; }
.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 11px 14px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 15px;
  color: var(--text);
  background: var(--bg-card);
  transition: border-color var(--transition), box-shadow var(--transition);
  appearance: none;
  -webkit-appearance: none;
}
.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(37,99,235,.12);
}
.form-input::placeholder { color: var(--text-light); }
.form-input:read-only {
  background: #F1F5F9;
  color: var(--text-muted);
  cursor: not-allowed;
}
.form-select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%2364748B' stroke-width='1.5' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 36px;
  cursor: pointer;
}
.input-hint {
  font-size: 12px;
  color: var(--text-muted);
}

/* ===== CIVILITY SELECTOR ===== */
.civility-group {
  display: flex;
  gap: 8px;
}
.civility-btn {
  flex: 1;
  padding: 10px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  font-size: 14px;
  font-weight: 600;
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--transition);
  text-align: center;
}
.civility-btn.active {
  border-color: var(--primary);
  background: var(--primary-light);
  color: var(--primary);
}

/* ===== AMOUNT ROW ===== */
.amount-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 0;
  font-size: 14px;
  color: var(--text-muted);
  border-bottom: 1px dashed var(--border);
}
.amount-row:last-child { border-bottom: none; }
.amount-row.total {
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
  border-bottom: none;
  padding-top: 12px;
  margin-top: 4px;
  border-top: 2px solid var(--border);
}
.amount-value {
  font-weight: 600;
  color: var(--text);
  font-size: 15px;
  font-variant-numeric: tabular-nums;
}
.amount-row.total .amount-value {
  color: var(--primary);
  font-size: 18px;
}
.amount-summary {
  background: #F8FAFC;
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  margin-top: 12px;
}

/* ===== TENANT ENTRIES ===== */
.tenant-entry {
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px 14px 12px;
  margin-bottom: 10px;
  background: var(--bg);
  transition: border-color var(--transition);
}
.tenant-entry:focus-within { border-color: var(--primary); }
.tenant-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}
.tenant-num { font-size: 12px; font-weight: 700; color: var(--primary); text-transform: uppercase; letter-spacing: .4px; }
.btn-remove-tenant {
  width: 22px; height: 22px;
  border: 1px solid var(--border);
  border-radius: 50%;
  background: none;
  cursor: pointer;
  color: var(--text-muted);
  display: flex; align-items: center; justify-content: center;
  transition: all var(--transition);
  flex-shrink: 0;
}
.btn-remove-tenant:hover { border-color: var(--danger); color: var(--danger); background: #FEF2F2; }
.btn-remove-tenant:disabled { opacity: .3; cursor: not-allowed; }
.btn-add-tenant {
  width: 100%;
  padding: 10px;
  border: 1.5px dashed var(--border);
  border-radius: var(--radius-sm);
  background: none;
  cursor: pointer;
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
  display: flex; align-items: center; justify-content: center; gap: 6px;
  transition: all var(--transition);
  margin-top: 2px;
}
.btn-add-tenant:hover { border-color: var(--primary); background: var(--primary-light); }

/* ===== TOP SAVES PANEL ===== */
.top-saves-panel {
  background: linear-gradient(135deg, #EFF6FF 0%, #F5F3FF 100%);
  border-bottom: 1px solid var(--border);
  padding: 14px 0 12px;
}
.top-saves-inner {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 16px;
}
.top-saves-header {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: .6px;
  margin-bottom: 10px;
}
.top-saves-scroll {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 2px;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}
.top-saves-scroll::-webkit-scrollbar { display: none; }
.save-chip {
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  padding: 8px 14px 7px;
  border: 1.5px solid #BFDBFE;
  border-radius: 24px;
  background: white;
  cursor: pointer;
  transition: all var(--transition);
  text-align: left;
  gap: 1px;
  box-shadow: var(--shadow-sm);
}
.save-chip:hover { border-color: var(--primary); background: var(--primary-light); box-shadow: var(--shadow); }
.save-chip-name { font-size: 13px; font-weight: 700; color: var(--text); line-height: 1.3; }
.save-chip-date { font-size: 11px; color: var(--text-muted); }

/* ===== PERIOD DATES ===== */
.period-row {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 8px;
  align-items: end;
}
.period-sep {
  font-size: 18px;
  color: var(--text-muted);
  padding-bottom: 10px;
  text-align: center;
  user-select: none;
}
.month-shortcut {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  background: #F8FAFC;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  flex-wrap: wrap;
  margin-top: 4px;
}
.month-shortcut-label {
  font-size: 12px;
  font-weight: 700;
  color: var(--text-muted);
  white-space: nowrap;
}
.form-select-sm {
  flex: 1;
  min-width: 110px;
  padding: 7px 28px 7px 10px;
  font-size: 14px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  background: white;
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%2364748B' stroke-width='1.5' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  cursor: pointer;
  color: var(--text);
}
.form-input-sm {
  width: 80px;
  padding: 7px 8px;
  font-size: 14px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  text-align: center;
  flex-shrink: 0;
}
.form-input-sm:focus, .form-select-sm:focus {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(37,99,235,.12);
}
.btn-shortcut {
  padding: 7px 14px;
  background: var(--primary-light);
  color: var(--primary);
  border: 1px solid #BFDBFE;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  white-space: nowrap;
  transition: all var(--transition);
  flex-shrink: 0;
}
.btn-shortcut:hover { background: var(--primary); color: white; border-color: var(--primary); }
@media (max-width: 400px) {
  .month-shortcut { gap: 6px; }
  .form-select-sm { min-width: 90px; }
  .form-input-sm { width: 68px; }
}

/* ===== SAVES PANEL ===== */
.saves-list { margin-bottom: 14px; }
.empty-saves {
  text-align: center;
  padding: 16px;
  color: var(--text-muted);
  font-size: 13px;
  background: var(--bg);
  border-radius: var(--radius-sm);
  border: 1.5px dashed var(--border);
}
.save-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  margin-bottom: 8px;
  background: var(--bg-card);
  transition: border-color var(--transition);
}
.save-item:hover { border-color: var(--primary); }
.save-item-info { flex: 1; min-width: 0; }
.save-item-name { font-size: 14px; font-weight: 600; display: block; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.save-item-date { font-size: 11px; color: var(--text-muted); }
.btn-load-save {
  padding: 5px 12px;
  border: 1px solid var(--primary);
  border-radius: 20px;
  background: none;
  color: var(--primary);
  font-size: 12px; font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: all var(--transition);
  flex-shrink: 0;
}
.btn-load-save:hover { background: var(--primary); color: white; }
.btn-delete-save {
  width: 22px; height: 22px;
  border: 1px solid var(--border);
  border-radius: 50%;
  background: none;
  cursor: pointer;
  color: var(--text-muted);
  display: flex; align-items: center; justify-content: center;
  transition: all var(--transition);
  flex-shrink: 0;
}
.btn-delete-save:hover { border-color: var(--danger); color: var(--danger); background: #FEF2F2; }
.save-form { }
.save-form-row {
  display: flex;
  gap: 10px;
  align-items: flex-end;
}
.save-btn-wrapper { flex-shrink: 0; }
.btn-save {
  padding: 11px 16px;
  background: var(--primary);
  color: white;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 14px; font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  display: flex; align-items: center; gap: 6px;
  transition: background var(--transition);
  height: 44px;
}
.btn-save:hover { background: var(--primary-dark); }
@media (max-width: 480px) {
  .save-form-row { flex-direction: column; align-items: stretch; }
  .btn-save { width: 100%; justify-content: center; }
}

/* ===== BUTTONS ===== */
.btn-generate {
  width: 100%;
  padding: 16px 24px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  color: white;
  border: none;
  border-radius: var(--radius);
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
  transition: all var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  box-shadow: 0 4px 15px rgba(37,99,235,.35);
  position: relative;
  overflow: hidden;
  letter-spacing: .2px;
  margin-top: 8px;
}
.btn-generate::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,.1);
  opacity: 0;
  transition: opacity var(--transition);
}
.btn-generate:hover::before { opacity: 1; }
.btn-generate:active { transform: translateY(1px); }
.btn-generate:disabled { opacity: .6; cursor: not-allowed; transform: none; }
.btn-generate.loading .btn-icon { display: none; }
.btn-generate .spinner {
  display: none;
  width: 20px;
  height: 20px;
  border: 2px solid rgba(255,255,255,.4);
  border-top-color: white;
  border-radius: 50%;
  animation: spin .6s linear infinite;
}
.btn-generate.loading .spinner { display: block; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ===== TOAST ===== */
.toast-container {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none;
}
.toast {
  padding: 12px 20px;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 600;
  box-shadow: var(--shadow-lg);
  animation: toastIn .3s ease;
  pointer-events: all;
  max-width: 320px;
  text-align: center;
}
.toast.success { background: #1C1917; color: white; }
.toast.error { background: var(--danger); color: white; }
@keyframes toastIn {
  from { opacity: 0; transform: translateY(20px) scale(.95); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}
@keyframes toastOut {
  from { opacity: 1; transform: translateY(0) scale(1); }
  to { opacity: 0; transform: translateY(20px) scale(.95); }
}

/* ===== FOOTER ===== */
.footer {
  text-align: center;
  padding: 32px 16px 40px;
  color: var(--text-muted);
  font-size: 13px;
  line-height: 1.8;
}
.footer a { color: var(--primary); text-decoration: none; }
.footer-links { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; margin-top: 8px; }

/* ===== RESPONSIVE ===== */
@media (max-width: 480px) {
  .form-row { grid-template-columns: 1fr; }
  .form-row.triple { grid-template-columns: 1fr 1fr; }
  .hero { padding: 28px 16px 20px; }
  .card-body { padding: 16px; }
}

/* ===== ADMIN STYLES ===== */
.admin-login {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
}
.admin-login-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  width: 100%;
  max-width: 400px;
  box-shadow: var(--shadow-xl);
  text-align: center;
}
.admin-title { font-size: 22px; font-weight: 800; margin-bottom: 6px; }
.admin-subtitle { color: var(--text-muted); font-size: 14px; margin-bottom: 28px; }
.btn-primary {
  width: 100%;
  padding: 13px 20px;
  background: var(--primary);
  color: white;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition);
}
.btn-primary:hover { background: var(--primary-dark); }

.admin-dashboard { max-width: 1100px; margin: 0 auto; padding: 24px 16px; }
.admin-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 28px; }
.admin-header h1 { font-size: 22px; font-weight: 800; }
.btn-logout { padding: 8px 16px; border: 1px solid var(--border); border-radius: var(--radius-sm); background: none; cursor: pointer; font-size: 13px; color: var(--text-muted); }

.stats-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 16px; margin-bottom: 28px; }
.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow-sm);
}
.stat-value { font-size: 32px; font-weight: 800; color: var(--primary); line-height: 1; }
.stat-label { font-size: 13px; color: var(--text-muted); margin-top: 4px; }

.table-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-sm); }
.table-header { padding: 16px 20px; border-bottom: 1px solid var(--border); font-weight: 700; font-size: 15px; }
table { width: 100%; border-collapse: collapse; }
th { padding: 12px 16px; text-align: left; font-size: 12px; font-weight: 700; text-transform: uppercase; letter-spacing: .5px; color: var(--text-muted); background: var(--bg); border-bottom: 1px solid var(--border); }
td { padding: 12px 16px; font-size: 14px; border-bottom: 1px solid var(--border); vertical-align: middle; }
tr:last-child td { border-bottom: none; }
tr:hover td { background: #F8FAFC; }
.country-flag { font-size: 18px; }
.ip-text { font-family: monospace; font-size: 13px; }