:root {
  --bg: #f4f6fa;
  --surface: #ffffff;
  --ink: #17233b;
  --muted: #6b7690;
  --line: #e4e8f0;
  --accent: #4f46e5;
  --accent-dark: #4338ca;
  --danger: #dc2626;
  --success: #15803d;
  --radius: 14px;
  --shadow: 0 1px 3px rgba(23, 35, 59, 0.08), 0 4px 14px rgba(23, 35, 59, 0.06);
}

* { box-sizing: border-box; }

[hidden] { display: none !important; }

html, body {
  margin: 0;
  min-height: 100%;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

/* ---------- Top bar ---------- */

.topbar {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 16px;
  padding: 12px 24px;
  background: var(--surface);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 10;
}

.brand { display: flex; align-items: center; gap: 18px; }

.brand-logo { height: 34px; width: auto; display: block; }

.topbar-title {
  font-weight: 750;
  font-size: 20px;
  letter-spacing: 0.2px;
  text-align: center;
  white-space: nowrap;
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: 12px;
  justify-self: end;
}

.user-chip {
  font-size: 14px;
  color: var(--muted);
  padding: 6px 12px;
  background: var(--bg);
  border-radius: 999px;
}

/* ---------- Layout ---------- */

#app { max-width: 1280px; margin: 0 auto; padding: 28px 32px 64px; }

.view h2 { font-size: 22px; margin: 8px 0 18px; }

.muted { color: var(--muted); }
.center { text-align: center; }

/* ---------- Login ---------- */

#view-login {
  min-height: calc(100vh - 60px);
  display: grid;
  place-items: center;
}

.login-card {
  width: 100%;
  max-width: 380px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 40px 32px;
  text-align: center;
}

.login-logos {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 28px;
  margin-bottom: 20px;
}

.login-logos img { height: 52px; width: auto; }

.login-card h1 { font-size: 22px; margin: 0 0 4px; }
.login-card .muted { margin: 0 0 24px; font-size: 14px; }

/* ---------- Forms ---------- */

.field { display: block; margin-bottom: 16px; }
.field > span { display: block; font-size: 13px; font-weight: 600; margin-bottom: 6px; color: var(--ink); }

.field input, .field textarea {
  width: 100%;
  padding: 13px 14px;
  font-size: 16px;
  font-family: inherit;
  color: var(--ink);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 10px;
  transition: border-color .15s, box-shadow .15s;
}

.field input:focus, .field textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.12);
}

.field-label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--ink);
}

/* ---------- Pills ---------- */

.pills { display: flex; flex-wrap: wrap; gap: 8px; }

.pill {
  font-family: inherit;
  font-size: 15px;
  font-weight: 600;
  padding: 11px 18px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--muted);
  cursor: pointer;
  transition: background .15s, color .15s, border-color .15s;
}

.pill:hover { border-color: var(--accent); color: var(--ink); }

.pill.selected {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.form-error { color: var(--danger); font-size: 14px; margin: 4px 0 12px; }

/* ---------- Buttons ---------- */

.btn {
  font-family: inherit;
  font-size: 15px;
  font-weight: 600;
  padding: 11px 18px;
  border-radius: 10px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background .15s, transform .05s;
}

.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: 0.6; cursor: default; }

.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-dark); }

.btn-ghost { background: transparent; color: var(--muted); border-color: var(--line); }
.btn-ghost:hover { background: var(--bg); color: var(--ink); }

.btn-danger { background: transparent; color: var(--danger); border-color: #fecaca; }
.btn-danger:hover { background: #fef2f2; }

.btn-block { width: 100%; }
.btn-lg { padding: 16px; font-size: 18px; border-radius: 12px; }

/* ---------- Split layout ---------- */

.split {
  display: grid;
  grid-template-columns: minmax(400px, 540px) 1fr;
  gap: 28px;
  align-items: start;
}

.panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 24px;
}

.panel h2 { margin-top: 0; font-size: 20px; }

.panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
}

.panel-head h2 { margin: 0; }

.panel-scroll {
  display: flex;
  flex-direction: column;
  max-height: calc(100vh - 180px);
}

.panel-scroll .visitor-list {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  padding-right: 6px;
}

.btn-sm { padding: 7px 12px; font-size: 13px; }

.form-actions { display: flex; align-items: center; gap: 10px; margin-top: 8px; }
.form-actions .spacer { flex: 1; }

.success-panel {
  margin-top: 24px;
  padding: 32px 24px;
  text-align: center;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.success-panel h2 { margin: 12px 0 4px; }

.success-check {
  width: 72px; height: 72px;
  margin: 0 auto 16px;
  display: grid; place-items: center;
  background: #dcfce7;
  color: var(--success);
  font-size: 36px;
  font-weight: 700;
  border-radius: 50%;
}

/* ---------- Visitor list ---------- */

.tabs { display: flex; gap: 4px; background: var(--bg); border: 1px solid var(--line); border-radius: 10px; padding: 4px; flex-shrink: 0; }

.tab {
  font-family: inherit;
  font-size: 14px;
  font-weight: 600;
  padding: 8px 16px;
  border: none;
  background: transparent;
  color: var(--muted);
  border-radius: 7px;
  cursor: pointer;
}

.tab.active { background: var(--accent); color: #fff; }

#admin-search {
  flex: 1;
  min-width: 140px;
  padding: 9px 14px;
  font-size: 15px;
  font-family: inherit;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--surface);
}

#admin-search:focus { outline: none; border-color: var(--accent); }

.visitor-list { display: flex; flex-direction: column; gap: 10px; }

.visitor-card {
  display: flex;
  align-items: center;
  gap: 16px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px 18px;
  box-shadow: var(--shadow);
}

.visitor-main { flex: 1; min-width: 0; }

.visitor-name { font-weight: 650; font-size: 16px; }
.visitor-sub { font-size: 14px; color: var(--muted); margin-top: 2px; }
.visitor-times { font-size: 13px; color: var(--muted); margin-top: 4px; }

.badge {
  font-size: 12px;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 999px;
  white-space: nowrap;
}

.badge-active { background: #dcfce7; color: var(--success); }
.badge-inactive { background: var(--bg); color: var(--muted); border: 1px solid var(--line); }

.visitor-actions { display: flex; gap: 8px; flex-shrink: 0; }

/* ---------- Toast ---------- */

#toast {
  position: fixed;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--ink);
  color: #fff;
  font-size: 15px;
  padding: 12px 22px;
  border-radius: 10px;
  box-shadow: 0 8px 24px rgba(15,23,42,0.3);
  z-index: 100;
}

/* ---------- Responsive ---------- */

@media (max-width: 860px) {
  .split { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .panel-head { flex-direction: column; align-items: stretch; }
  .tabs { justify-content: space-between; }
  .tab { flex: 1; }
  .visitor-card { flex-wrap: wrap; }
  .visitor-actions { width: 100%; }
  .visitor-actions .btn { flex: 1; }
}