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

:root {
  --primary: #1a56db;
  --primary-hover: #1442a8;
  --danger: #dc2626;
  --danger-hover: #b91c1c;
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-500: #6b7280;
  --gray-700: #374151;
  --gray-900: #111827;
  --radius: 8px;
  --shadow: 0 1px 3px rgba(0,0,0,.1), 0 1px 2px rgba(0,0,0,.06);
  --shadow-lg: 0 4px 12px rgba(0,0,0,.1);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  color: var(--gray-900);
  background: var(--gray-50);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

/* ── Header ───────────────────────────────────────────────────────────────── */
.header {
  background: #fff;
  border-bottom: 1px solid var(--gray-200);
  padding: 0 1.5rem;
  position: sticky;
  top: 0;
  z-index: 100;
}
.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.logo img { height: 40px; }
.logo-fallback { font-weight: 700; font-size: 1.2rem; color: var(--gray-900); }
.nav { display: flex; align-items: center; gap: 1rem; }
.nav a { font-size: .9rem; white-space: nowrap; }
.nav-link-muted { color: var(--gray-500) !important; }

/* ── Main ─────────────────────────────────────────────────────────────────── */
.main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
  width: 100%;
  flex: 1;
}

/* ── Footer ───────────────────────────────────────────────────────────────── */
.footer {
  text-align: center;
  padding: 1.5rem;
  color: var(--gray-500);
  font-size: .85rem;
  border-top: 1px solid var(--gray-200);
}
.footer a { color: var(--gray-500); }

/* ── Buttons ──────────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  padding: .5rem 1rem;
  border-radius: var(--radius);
  border: 1px solid var(--gray-300);
  background: #fff;
  color: var(--gray-700);
  font-size: .875rem;
  font-weight: 500;
  cursor: pointer;
  text-decoration: none !important;
  transition: all .15s;
}
.btn:hover { background: var(--gray-100); }
.btn-primary { background: var(--primary); color: #fff; border-color: var(--primary); }
.btn-primary:hover { background: var(--primary-hover); }
.btn-danger { background: var(--danger); color: #fff; border-color: var(--danger); }
.btn-danger:hover { background: var(--danger-hover); }
.btn-sm { padding: .3rem .6rem; font-size: .8rem; }
.btn-full { width: 100%; justify-content: center; }

/* ── Forms ─────────────────────────────────────────────────────────────────── */
.form { max-width: 480px; }
.form-wide { max-width: 720px; }
.form-group { margin-bottom: 1rem; }
.form-group label {
  display: block;
  font-weight: 500;
  font-size: .875rem;
  margin-bottom: .3rem;
  color: var(--gray-700);
}
.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: .6rem .75rem;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius);
  font-size: .95rem;
  font-family: inherit;
  transition: border-color .15s;
}
.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(26,86,219,.1);
}
.form-group input[type="file"] { padding: .4rem; }
.form-hint { font-size: .8rem; color: var(--gray-500); margin-top: .25rem; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
fieldset {
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 1.25rem;
  margin-bottom: 1.5rem;
}
fieldset legend {
  font-weight: 600;
  font-size: .95rem;
  padding: 0 .5rem;
}

/* ── Alerts ────────────────────────────────────────────────────────────────── */
.alert {
  padding: .75rem 1rem;
  border-radius: var(--radius);
  margin-bottom: 1rem;
  font-size: .9rem;
}
.alert-error { background: #fef2f2; color: var(--danger); border: 1px solid #fecaca; }

/* ── Center Card (login) ──────────────────────────────────────────────────── */
.center-card {
  max-width: 420px;
  margin: 3rem auto;
  background: #fff;
  padding: 2rem;
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
}
.center-card h1 { margin-bottom: .25rem; }
.subtitle { color: var(--gray-500); margin-bottom: 1.5rem; }

/* ── Page Header ──────────────────────────────────────────────────────────── */
.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
  gap: .75rem;
}
.back-link {
  display: inline-block;
  margin-bottom: 1rem;
  font-size: .9rem;
  color: var(--gray-500);
}
.back-link:hover { color: var(--primary); }

/* ── Card Grid ────────────────────────────────────────────────────────────── */
.card-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 1rem; }
.card {
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 1.25rem;
  display: block;
  color: inherit;
  transition: box-shadow .15s;
}
.card:hover { box-shadow: var(--shadow-lg); text-decoration: none; }
.card-header { display: flex; align-items: flex-start; justify-content: space-between; gap: .5rem; }
.card-header h2 { font-size: 1.1rem; }
.badge {
  background: var(--gray-100);
  color: var(--gray-700);
  font-size: .75rem;
  padding: .2rem .5rem;
  border-radius: 9999px;
  white-space: nowrap;
}
.card-note { color: var(--gray-500); font-size: .9rem; margin-top: .5rem; }
.card-date { color: var(--gray-500); font-size: .8rem; margin-top: .5rem; }

/* ── Table ────────────────────────────────────────────────────────────────── */
.table-wrap { overflow-x: auto; }
.table {
  width: 100%;
  border-collapse: collapse;
  font-size: .9rem;
}
.table th, .table td {
  padding: .6rem .75rem;
  text-align: left;
  border-bottom: 1px solid var(--gray-200);
}
.table th { font-weight: 600; color: var(--gray-500); font-size: .8rem; text-transform: uppercase; letter-spacing: .03em; }
.table tbody tr:hover { background: var(--gray-50); }
.table-sm { font-size: .85rem; }

/* ── Offer Detail ─────────────────────────────────────────────────────────── */
.offer-header { margin-bottom: 1.5rem; }
.offer-header h1 { margin-bottom: .25rem; }
.offer-date { color: var(--gray-500); font-size: .9rem; }

.offer-customer-info,
.offer-note,
.offer-files {
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 1.25rem;
  margin-bottom: 1rem;
}
.offer-customer-info h3,
.offer-note h3,
.offer-files h3 { margin-bottom: .75rem; font-size: 1rem; }
.customer-details p { margin-bottom: .2rem; }

.detail-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; }
.detail-section {
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 1.25rem;
  margin-bottom: 1rem;
}
.detail-section h3 { margin-bottom: .75rem; font-size: 1rem; }

.share-box {
  margin-top: 1.5rem;
  padding: 1rem;
  background: var(--gray-50);
  border-radius: var(--radius);
}
.share-url {
  display: block;
  padding: .5rem .75rem;
  background: #fff;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius);
  font-size: .9rem;
  margin-top: .5rem;
  word-break: break-all;
}

/* ── File List ────────────────────────────────────────────────────────────── */
.file-list { display: flex; flex-direction: column; gap: .5rem; }
.file-item {
  display: flex;
  align-items: center;
  gap: .75rem;
  padding: .75rem;
  background: var(--gray-50);
  border-radius: var(--radius);
}
.file-icon { font-size: 1.5rem; }
.file-info { flex: 1; min-width: 0; }
.file-name { font-weight: 500; font-size: .9rem; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.file-size { color: var(--gray-500); font-size: .8rem; }
.file-actions { display: flex; gap: .4rem; flex-shrink: 0; }

.upload-more { margin-top: 1rem; padding-top: 1rem; border-top: 1px solid var(--gray-200); }

/* ── Utilities ────────────────────────────────────────────────────────────── */
.text-muted { color: var(--gray-500); }
.inline-form { display: inline; }
.empty-state { text-align: center; padding: 3rem 1rem; color: var(--gray-500); }
.empty-state .btn { margin-top: 1rem; }

/* ── Responsive ───────────────────────────────────────────────────────────── */
@media (max-width: 768px) {
  .form-row { grid-template-columns: 1fr; }
  .detail-grid { grid-template-columns: 1fr; }
  .card-grid { grid-template-columns: 1fr; }
  .header-inner { height: auto; padding: .75rem 0; flex-wrap: wrap; gap: .5rem; }
  .nav { gap: .5rem; }
}