:root {
  --brand: #4f46e5;
  --brand-dark: #3730a3;
  --text: #1f2333;
  --muted: #6b7280;
  --bg: #f7f8fc;
  --card: #ffffff;
  --border: #e5e7eb;
  --success: #16a34a;
  --error: #dc2626;
  --radius: 12px;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: 'Montserrat', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
.container { max-width: 1080px; margin: 0 auto; padding: 0 20px; }
a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3 { font-weight: 700; line-height: 1.2; }

/* ---------- Header ---------- */
.site-header { background: var(--card); border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 50; }
.nav-wrap { display: flex; align-items: center; justify-content: space-between; padding: 14px 20px; }
.logo { font-weight: 800; font-size: 1.3rem; color: var(--text); }
.main-nav { display: flex; align-items: center; gap: 20px; }
.main-nav a { color: var(--text); font-weight: 500; }
.main-nav a:hover { color: var(--brand); text-decoration: none; }
.btn-nav { background: var(--brand); color: #fff !important; padding: 8px 16px; border-radius: 8px; }
.nav-toggle { display: none; background: none; border: none; font-size: 1.5rem; cursor: pointer; }

@media (max-width: 760px) {
  .nav-toggle { display: block; }
  .main-nav {
    display: none; position: absolute; top: 100%; left: 0; right: 0;
    background: var(--card); flex-direction: column; align-items: stretch;
    padding: 10px 20px 16px; border-bottom: 1px solid var(--border); gap: 12px;
  }
  .main-nav.open { display: flex; }
}

/* ---------- Buttons & forms ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  background: var(--brand); color: #fff; border: none; border-radius: 8px;
  padding: 12px 22px; font-family: inherit; font-weight: 600; font-size: 0.98rem;
  cursor: pointer; transition: background .15s ease;
}
.btn:hover { background: var(--brand-dark); text-decoration: none; }
.btn-secondary { background: #fff; color: var(--text); border: 1px solid var(--border); }
.btn-secondary:hover { background: #f3f4f6; }
.btn-danger { background: var(--error); }
.btn-sm { padding: 7px 12px; font-size: 0.85rem; }
.btn-block { width: 100%; }

input[type="text"], input[type="url"], input[type="email"], input[type="password"],
input[type="date"], input[type="datetime-local"], input[type="number"], textarea, select {
  width: 100%; padding: 12px 14px; border: 1px solid var(--border); border-radius: 8px;
  font-family: inherit; font-size: 1rem; background: #fff; color: var(--text);
}
input:focus, textarea:focus, select:focus { outline: 2px solid var(--brand); outline-offset: 1px; }
label { display: block; font-weight: 600; font-size: 0.9rem; margin-bottom: 6px; }
.field { margin-bottom: 18px; }
.field-hint { font-size: 0.82rem; color: var(--muted); margin-top: 4px; }
.form-row { display: flex; gap: 14px; flex-wrap: wrap; }
.form-row > .field { flex: 1; min-width: 200px; }
.checkbox-row { display: flex; align-items: center; gap: 8px; }
.checkbox-row input { width: auto; }
.checkbox-row label { margin: 0; font-weight: 500; }

/* ---------- Alerts ---------- */
.alert { padding: 12px 16px; border-radius: 8px; margin: 16px 0; font-weight: 500; }
.alert-success { background: #dcfce7; color: #166534; }
.alert-error { background: #fee2e2; color: #991b1b; }
.alert-info { background: #dbeafe; color: #1e40af; }

/* ---------- Hero / shortener form ---------- */
.hero { text-align: center; padding: 56px 0 24px; }
.hero h1 { font-size: clamp(1.7rem, 4vw, 2.6rem); margin-bottom: 10px; }
.hero p { color: var(--muted); font-size: 1.05rem; max-width: 560px; margin: 0 auto; }

.shorten-card {
  background: var(--card); border-radius: var(--radius); border: 1px solid var(--border);
  padding: 26px; max-width: 640px; margin: 28px auto; box-shadow: 0 8px 30px rgba(20,20,50,.05);
}
.result-card {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 20px; max-width: 640px; margin: 18px auto; text-align: left;
}
.result-row { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.result-link { font-weight: 700; font-size: 1.05rem; word-break: break-all; }
.share-row { display: flex; gap: 10px; margin-top: 14px; flex-wrap: wrap; }
.share-row a { background: #f3f4f6; padding: 8px 12px; border-radius: 8px; font-size: 0.85rem; color: var(--text); }
.qr-box { text-align: center; margin-top: 16px; }
.qr-box canvas, .qr-box img { border-radius: 8px; }

/* ---------- Cards / tables ---------- */
.card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px; margin-bottom: 20px; }
.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 14px; margin: 20px 0; }
.stat-box { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px; text-align: center; }
.stat-box .num { font-size: 1.7rem; font-weight: 800; color: var(--brand); }
.stat-box .label { font-size: 0.82rem; color: var(--muted); margin-top: 4px; }

table { width: 100%; border-collapse: collapse; font-size: 0.92rem; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--border); }
th { color: var(--muted); font-weight: 600; font-size: 0.8rem; text-transform: uppercase; letter-spacing: .03em; }
.table-wrap { overflow-x: auto; }
.badge { display: inline-block; padding: 3px 10px; border-radius: 999px; font-size: 0.75rem; font-weight: 700; }
.badge-active { background: #dcfce7; color: #166534; }
.badge-disabled { background: #f3f4f6; color: #4b5563; }
.badge-expired { background: #fee2e2; color: #991b1b; }
.badge-scheduled { background: #fef9c3; color: #854d0e; }
.badge-password { background: #e0e7ff; color: #3730a3; }

.page-title-row { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 12px; margin: 26px 0 6px; }

/* ---------- Auth pages ---------- */
.auth-card { max-width: 420px; margin: 50px auto; }
.auth-card h1 { font-size: 1.5rem; text-align: center; margin-bottom: 20px; }
.auth-links { text-align: center; margin-top: 16px; font-size: 0.9rem; }

/* ---------- Footer ---------- */
.site-footer { border-top: 1px solid var(--border); margin-top: 60px; padding: 24px 0; color: var(--muted); font-size: 0.85rem; }
.footer-wrap { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; }
.footer-nav a { color: var(--muted); margin-left: 16px; }
.footer-nav a:first-child { margin-left: 0; }

@media (max-width: 600px) {
  .footer-wrap { flex-direction: column; text-align: center; }
  .footer-nav a { margin: 0 8px; }
}