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

:root {
  --primary: #1a56db;
  --primary-dark: #1e3a5f;
  --primary-light: #e8eefb;
  --success: #059669;
  --success-bg: #ecfdf5;
  --warning: #d97706;
  --warning-bg: #fffbeb;
  --danger: #dc2626;
  --danger-bg: #fef2f2;
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-500: #6b7280;
  --gray-700: #374151;
  --gray-900: #111827;
  --radius: 10px;
  --shadow: 0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.06);
  --shadow-md: 0 4px 12px rgba(0,0,0,.1);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--gray-50);
  color: var(--gray-900);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

/* ── Top Nav ──────────────────────────────────────────────────────── */
.topnav {
  background: var(--primary-dark);
  color: #fff;
  padding: 0 16px;
  display: flex;
  align-items: center;
  height: 56px;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-md);
}
.topnav .brand {
  font-weight: 700;
  font-size: 18px;
  letter-spacing: -.3px;
  margin-right: auto;
}
.topnav a {
  color: rgba(255,255,255,.85);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  padding: 8px 12px;
  border-radius: 6px;
  transition: background .15s;
}
.topnav a:hover { background: rgba(255,255,255,.12); }
.topnav a.active { background: rgba(255,255,255,.18); color: #fff; }

/* ── Layout ───────────────────────────────────────────────────────── */
.container {
  max-width: 600px;
  margin: 24px auto;
  padding: 0 16px;
}
.container.wide { max-width: 960px; }

/* ── Cards ────────────────────────────────────────────────────────── */
.card {
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 24px;
  margin-bottom: 20px;
}
.card h2 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--primary-dark);
}

/* ── Forms ─────────────────────────────────────────────────────────── */
.form-group {
  margin-bottom: 16px;
}
.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--gray-700);
  margin-bottom: 5px;
  text-transform: uppercase;
  letter-spacing: .4px;
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1.5px solid var(--gray-200);
  border-radius: 8px;
  font-size: 15px;
  color: var(--gray-900);
  background: #fff;
  transition: border-color .15s, box-shadow .15s;
  outline: none;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-light);
}
.form-group textarea { resize: vertical; min-height: 70px; }
.form-group .hint { font-size: 12px; color: var(--gray-500); margin-top: 4px; }

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

/* ── Buttons ──────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 20px;
  border: none;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: background .15s, transform .1s;
}
.btn:active { transform: scale(.97); }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: #1648b8; }
.btn-success { background: var(--success); color: #fff; }
.btn-success:hover { background: #047857; }
.btn-danger  { background: var(--danger); color: #fff; }
.btn-danger:hover { background: #b91c1c; }
.btn-outline {
  background: transparent;
  border: 1.5px solid var(--gray-300);
  color: var(--gray-700);
}
.btn-outline:hover { background: var(--gray-100); }
.btn-sm { padding: 6px 12px; font-size: 12px; }
.btn-block { width: 100%; }
.btn:disabled { opacity: .5; cursor: not-allowed; }

/* ── Validation result panel ──────────────────────────────────────── */
.validation-panel {
  border-radius: var(--radius);
  padding: 16px;
  margin-top: 16px;
  display: none;
}
.validation-panel.show { display: block; }
.validation-panel.approved { background: var(--success-bg); border: 1px solid var(--success); }
.validation-panel.flagged  { background: var(--warning-bg); border: 1px solid var(--warning); }
.validation-panel h3 {
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 8px;
}
.validation-panel .flags { list-style: none; padding: 0; }
.validation-panel .flags li {
  padding: 4px 0;
  font-size: 13px;
  color: var(--gray-700);
}
.validation-panel .flags li::before { content: "\26A0\FE0F "; }
.validation-panel .gst-note {
  margin-top: 8px;
  font-size: 13px;
  color: var(--gray-500);
  font-style: italic;
}

/* ── Loader ───────────────────────────────────────────────────────── */
.loader {
  display: none;
  text-align: center;
  padding: 20px;
}
.loader.show { display: block; }
.spinner {
  width: 32px; height: 32px;
  border: 3px solid var(--gray-200);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin .6s linear infinite;
  margin: 0 auto 8px;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ── Status badges ────────────────────────────────────────────────── */
.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .5px;
}
.badge-pending  { background: #fef3c7; color: #92400e; }
.badge-flagged  { background: #fee2e2; color: #991b1b; }
.badge-approved { background: #d1fae5; color: #065f46; }
.badge-rejected { background: var(--gray-200); color: var(--gray-500); }

/* ── Tables ───────────────────────────────────────────────────────── */
.table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}
th {
  text-align: left;
  padding: 8px 10px;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .5px;
  color: var(--gray-500);
  border-bottom: 2px solid var(--gray-200);
}
td {
  padding: 10px;
  border-bottom: 1px solid var(--gray-100);
  vertical-align: middle;
}

/* ── Summary stats ────────────────────────────────────────────────── */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 12px;
  margin-bottom: 20px;
}
.stat-card {
  background: #fff;
  border-radius: var(--radius);
  padding: 16px;
  box-shadow: var(--shadow);
  text-align: center;
}
.stat-card .number {
  font-size: 28px;
  font-weight: 800;
  color: var(--primary-dark);
}
.stat-card .label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: .5px;
  color: var(--gray-500);
  margin-top: 4px;
}

/* ── Toast ─────────────────────────────────────────────────────────── */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(80px);
  background: var(--gray-900);
  color: #fff;
  padding: 12px 24px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  box-shadow: var(--shadow-md);
  transition: transform .3s ease;
  z-index: 200;
}
.toast.show { transform: translateX(-50%) translateY(0); }

/* ── Zoho banner ──────────────────────────────────────────────────── */
.zoho-banner {
  background: var(--warning-bg);
  border: 1px solid var(--warning);
  border-radius: var(--radius);
  padding: 12px 16px;
  margin-bottom: 16px;
  font-size: 13px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.zoho-banner a { color: var(--primary); font-weight: 600; }

/* ── Responsive ───────────────────────────────────────────────────── */
@media (max-width: 480px) {
  .form-row { grid-template-columns: 1fr; }
  .topnav { padding: 0 10px; }
  .topnav a { padding: 6px 8px; font-size: 12px; }
  .container { padding: 0 12px; margin-top: 16px; }
  .card { padding: 16px; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
}

/* ── Action row in tables ─────────────────────────────────────────── */
.action-btns {
  display: flex;
  gap: 6px;
}

/* ── Empty state ──────────────────────────────────────────────────── */
.empty-state {
  text-align: center;
  padding: 40px 16px;
  color: var(--gray-500);
}
.empty-state p { font-size: 14px; }

/* ── Detail modal/expandable ──────────────────────────────────────── */
.entry-detail {
  background: var(--gray-50);
  border-radius: 8px;
  padding: 12px;
  margin-top: 8px;
  font-size: 13px;
}
.entry-detail dt { font-weight: 600; color: var(--gray-500); font-size: 11px; text-transform: uppercase; }
.entry-detail dd { margin-bottom: 8px; margin-left: 0; }

/* ── Upload hero zone ────────────────────────────────────────────── */
.upload-hero { margin-bottom: 20px; }
.upload-zone {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  border: 2px dashed var(--primary); border-radius: var(--radius);
  background: var(--primary-light); padding: 28px 16px;
  cursor: pointer; transition: background .15s, border-color .15s;
  text-align: center;
}
.upload-zone:hover { background: #dce5f8; border-color: #1648b8; }
.upload-icon { font-size: 36px; margin-bottom: 6px; }
.upload-text strong { display: block; font-size: 15px; color: var(--primary-dark); }
.upload-text span { font-size: 13px; color: var(--gray-500); }
.upload-or {
  text-align: center; font-size: 12px; color: var(--gray-500);
  margin: 10px 0 0; font-style: italic;
}
.file-preview {
  margin-top: 12px; text-align: center;
  padding: 12px; background: var(--gray-50); border-radius: 8px;
  border: 1px solid var(--gray-200);
}

/* ── GST detail card ─────────────────────────────────────────────── */
.gst-card {
  background: var(--gray-50); border: 1px solid var(--gray-200);
  border-radius: var(--radius); padding: 16px; margin-bottom: 16px;
}
.gst-heading {
  font-size: 13px; font-weight: 700; text-transform: uppercase;
  letter-spacing: .4px; color: var(--gray-500); margin-bottom: 12px;
}

/* ── Modal ────────────────────────────────────────────────────────── */
.modal-overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,.45);
  display: flex; align-items: center; justify-content: center;
  z-index: 300;
}
.modal-overlay.hidden { display: none; }
.modal {
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  width: 90%; max-width: 560px;
  max-height: 85vh; overflow-y: auto;
  padding: 24px;
}
.modal h2 { font-size: 16px; margin-bottom: 16px; color: var(--primary-dark); }
.modal .form-row { gap: 10px; }
.modal .btn-row { display: flex; gap: 8px; justify-content: flex-end; margin-top: 16px; }

.btn-edit { background: var(--primary); color: #fff; }
.btn-edit:hover { background: #1648b8; }