/* ==========================================================
   style.css — Interview Slot Booking Portal
   Shared styles for login, admin and student pages.
   ========================================================== */

:root {
  --ink: #10172a;
  --panel: #16203d;
  --panel-2: #1c274a;
  --border: #2a3560;
  --text: #eef1fb;
  --muted: #8791b8;
  --gold: #e4b94c;
  --green: #3f9469;
  --green-bg: #16301f;
  --red: #d15c4a;
  --red-bg: #3a1f1d;
  --blue: #6fa0e0;
  --radius: 10px;
  --shadow: 0 10px 30px rgba(0,0,0,0.25);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--ink);
  color: var(--text);
  min-height: 100vh;
}

h1, h2, h3, h4 { font-family: 'Space Grotesk', 'Inter', sans-serif; margin: 0; }

a { color: inherit; }

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
}

input, select, textarea, button {
  font-family: inherit;
  font-size: 14px;
}

input, select, textarea {
  background: var(--ink);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 10px 12px;
  border-radius: 8px;
  outline: none;
  width: 100%;
}

input:focus, select:focus, textarea:focus { border-color: var(--gold); }

.btn {
  padding: 10px 18px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 14px;
  transition: transform 0.1s ease, opacity 0.15s ease;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.btn:active { transform: scale(0.97); }
.btn:disabled { opacity: 0.4; cursor: not-allowed; }
.btn-primary { background: var(--gold); color: #10172a; }
.btn-outline { background: transparent; border: 1px solid var(--border); color: var(--text); }
.btn-danger { background: var(--red); color: #fff; }
.btn-success { background: var(--green); color: #fff; }
.btn-sm { padding: 6px 12px; font-size: 12.5px; }
.btn-block { width: 100%; justify-content: center; }

/* ---------- Login page ---------- */
.login-wrap {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: radial-gradient(circle at top, #16203d 0%, #0b1120 70%);
}
.login-card {
  width: 100%;
  max-width: 380px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 36px;
  box-shadow: var(--shadow);
}
.login-card .badge {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--gold);
  margin-bottom: 6px;
}

/* ---------- Brand logo (white PNG on a dark theme, so give it a card) ---------- */
.brand-logo {
  background: #fff;
  border-radius: 10px;
  padding: 4px 8px;
  display: inline-flex;
  align-items: center;
}
.brand-logo img { display: block; height: 28px; width: auto; }
.login-card .brand-logo { padding: 6px 10px; margin-bottom: 14px; }
.login-card .brand-logo img { height: 40px; }
.sidebar .brand-logo { margin: 0 10px 10px; align-self: flex-start; }
.login-card h2 { font-size: 22px; margin-bottom: 4px; }
.login-card p.sub { color: var(--muted); font-size: 13px; margin: 4px 0 20px; }

.role-toggle {
  display: flex;
  gap: 4px;
  background: var(--ink);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 4px;
  margin: 6px 0 18px;
}
.role-toggle-btn {
  flex: 1;
  background: transparent;
  color: var(--muted);
  border-radius: 7px;
  padding: 8px 10px;
  font-size: 13px;
  font-weight: 600;
}
.role-toggle-btn.active { background: var(--gold); color: #10172a; }
.field { margin-bottom: 14px; }
.field label { display: block; font-size: 12px; color: var(--muted); margin-bottom: 5px; }
.error-msg { color: var(--red); font-size: 13px; margin: 8px 0; min-height: 18px; }

.password-wrap { position: relative; }
.password-wrap input { padding-right: 42px; }
.toggle-password {
  position: absolute;
  right: 6px;
  top: 50%;
  transform: translateY(-50%);
  background: transparent;
  color: var(--muted);
  font-size: 16px;
  line-height: 1;
  padding: 6px;
  border-radius: 6px;
}
.toggle-password:hover { color: var(--text); }
.demo-hint { text-align: center; font-size: 11.5px; color: var(--muted); margin-top: 18px; }

/* ---------- Contact footer ---------- */
.contact-footer {
  margin-top: 28px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}
.contact-footer-title {
  font-size: 12px;
  color: var(--muted);
  margin: 0 0 10px;
}
.contact-links { display: flex; flex-wrap: wrap; gap: 18px; }
.contact-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--text);
  text-decoration: none;
  font-size: 13px;
  font-weight: 500;
}
.contact-link:hover { color: var(--gold); }
.contact-link svg { width: 16px; height: 16px; flex-shrink: 0; display: block; }

.contact-footer-standalone {
  max-width: 380px;
  width: 100%;
  margin-top: 18px;
  padding-top: 16px;
  text-align: center;
}
.contact-footer-standalone .contact-links { justify-content: center; }

/* ---------- App shell (admin/student) ---------- */
.app-shell { display: flex; min-height: 100vh; }
.sidebar {
  width: 220px;
  flex-shrink: 0;
  background: var(--panel);
  border-right: 1px solid var(--border);
  padding: 20px 14px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.sidebar .brand { font-size: 10px; letter-spacing: 0.2em; color: var(--gold); font-family: 'IBM Plex Mono', monospace; padding: 0 10px 4px; }
.sidebar .userline { font-size: 13px; color: var(--muted); padding: 0 10px 18px; border-bottom: 1px solid var(--border); margin-bottom: 10px; }
.nav-item {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 12px; border-radius: 8px; color: var(--muted);
  font-size: 14px; background: transparent; text-align: left; width: 100%;
}
.nav-item:hover { background: var(--panel-2); color: var(--text); }
.nav-item.active { background: var(--panel-2); color: var(--text); border-left: 3px solid var(--gold); }
.nav-spacer { flex: 1; }

.main-area { flex: 1; padding: 26px 30px; max-width: 1100px; }
.page-title { font-size: 22px; margin-bottom: 4px; }
.page-sub { color: var(--muted); font-size: 13px; margin-bottom: 22px; }

.tab-section { display: none; }
.tab-section.active { display: block; }

/* ---------- Dashboard cards ---------- */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
  margin-bottom: 26px;
}
.stat-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
}
.stat-card .label { font-size: 12px; color: var(--muted); margin-bottom: 8px; }
.stat-card .value { font-size: 28px; font-weight: 700; font-family: 'Space Grotesk', sans-serif; }
.stat-card.gold .value { color: var(--gold); }
.stat-card.green .value { color: var(--green); }
.stat-card.blue .value { color: var(--blue); }

/* ---------- Cards / panels ---------- */
.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 18px;
}
.panel-title { font-size: 14px; color: var(--muted); margin-bottom: 14px; }
.form-row { display: flex; flex-wrap: wrap; gap: 12px; align-items: flex-end; }
.form-row .field { flex: 1; min-width: 150px; margin-bottom: 0; }

/* ---------- Tables ---------- */
table.data-table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
table.data-table th {
  text-align: left; color: var(--muted); font-weight: 600; font-size: 11px;
  letter-spacing: 0.04em; text-transform: uppercase; padding: 10px 12px; border-bottom: 1px solid var(--border);
}
table.data-table td { padding: 10px 12px; border-bottom: 1px solid var(--border); }
table.data-table tr:hover td { background: rgba(255,255,255,0.02); }
.pill { padding: 3px 9px; border-radius: 999px; font-size: 11px; font-weight: 600; display: inline-block; }
.pill.active, .pill.confirmed { background: var(--green-bg); color: #8fc1a9; }
.pill.inactive, .pill.cancelled { background: var(--red-bg); color: #e0a093; }
.table-scroll { overflow-x: auto; }

/* ---------- Booking layout (student calendar + slot panel) ---------- */
.booking-layout {
  display: grid;
  grid-template-columns: minmax(260px, 340px) 1fr;
  gap: 20px;
  align-items: start;
}

/* ---------- Calendar ---------- */
.calendar {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
}
.calendar-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 14px; }
.calendar-header button { background: var(--panel-2); color: var(--text); padding: 6px 12px; border-radius: 6px; }
.calendar-grid { display: grid; grid-template-columns: repeat(7, 1fr); gap: 6px; }
.calendar-grid .dow { text-align: center; font-size: 11px; color: var(--muted); padding-bottom: 4px; }
.cal-day {
  aspect-ratio: 1; display: flex; align-items: center; justify-content: center;
  border-radius: 8px; font-size: 13px; background: var(--panel-2); color: var(--text);
  border: 1px solid transparent; position: relative;
}
.cal-day.empty { background: transparent; }
.cal-day.selectable:hover { border-color: var(--gold); cursor: pointer; }
.cal-day.selected { background: var(--gold); color: #10172a; font-weight: 700; }
.cal-day.state-available { box-shadow: inset 0 -3px 0 var(--green); }
.cal-day.state-full { box-shadow: inset 0 -3px 0 var(--red); }
.cal-day.state-blocked { opacity: 0.45; box-shadow: inset 0 -3px 0 var(--muted); cursor: not-allowed; }
.cal-day.state-past { opacity: 0.3; cursor: not-allowed; }
.cal-legend { display: flex; gap: 16px; margin-top: 12px; font-size: 12px; color: var(--muted); flex-wrap: wrap; }
.cal-legend span { display: inline-flex; align-items: center; gap: 6px; }
.dot { width: 9px; height: 9px; border-radius: 50%; display: inline-block; }
.dot.green { background: var(--green); } .dot.red { background: var(--red); } .dot.grey { background: var(--muted); }

/* ---------- Slot grid ---------- */
.slot-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
  gap: 10px; margin-top: 14px;
}
.slot-cell {
  border-radius: 8px; padding: 10px 6px; text-align: center; font-family: 'IBM Plex Mono', monospace;
  font-size: 13px; border: 1px solid transparent;
}
.slot-cell.available { background: var(--green-bg); color: #8fc1a9; border-color: var(--green); cursor: pointer; }
.slot-cell.available:hover { transform: translateY(-2px); }
.slot-cell.booked, .slot-cell.past { background: var(--red-bg); color: #e0a093; opacity: 0.75; cursor: not-allowed; }
.slot-cell.blocked { background: rgba(255,255,255,0.04); color: var(--muted); cursor: not-allowed; }
.slot-cell .tag { display: block; font-size: 9px; letter-spacing: 0.1em; margin-top: 3px; }

/* ---------- Modal ---------- */
.modal-backdrop {
  position: fixed; inset: 0; background: rgba(0,0,0,0.5);
  display: none; align-items: center; justify-content: center; z-index: 100; padding: 16px;
}
.modal-backdrop.open { display: flex; }
.modal-box {
  background: var(--panel); border: 1px solid var(--border); border-radius: 14px;
  padding: 24px; width: 100%; max-width: 420px; max-height: 90vh; overflow-y: auto;
}
.modal-box .modal-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 14px; }
.modal-box .modal-head button { background: transparent; color: var(--muted); font-size: 18px; }

/* ---------- Confirmation summary ---------- */
.confirm-list { list-style: none; padding: 0; margin: 0 0 16px; }
.confirm-list li {
  display: flex; justify-content: space-between; gap: 12px;
  padding: 9px 0; border-bottom: 1px solid var(--border); font-size: 13.5px;
}
.confirm-list li span:first-child { color: var(--muted); }
.confirm-list li span:last-child { text-align: right; font-weight: 600; }
.confirm-icon {
  width: 46px; height: 46px; border-radius: 50%; background: var(--green-bg); color: var(--green);
  display: flex; align-items: center; justify-content: center; font-size: 22px; margin: 0 auto 12px;
}

/* ---------- Toast ---------- */
#toast-container { position: fixed; top: 18px; right: 18px; z-index: 200; display: flex; flex-direction: column; gap: 8px; }
.toast {
  padding: 12px 16px; border-radius: 8px; font-size: 13.5px; color: #fff;
  box-shadow: var(--shadow); min-width: 220px; animation: slidein 0.2s ease;
}
.toast.success { background: var(--green); }
.toast.error { background: var(--red); }
@keyframes slidein { from { transform: translateX(20px); opacity: 0; } to { transform: translateX(0); opacity: 1; } }

/* ---------- Loading ---------- */
.spinner {
  width: 18px; height: 18px; border: 2px solid rgba(255,255,255,0.3); border-top-color: #fff;
  border-radius: 50%; animation: spin 0.7s linear infinite; display: inline-block;
}
@keyframes spin { to { transform: rotate(360deg); } }
#page-loader {
  position: fixed; inset: 0; background: var(--ink); display: flex; align-items: center; justify-content: center;
  z-index: 300; flex-direction: column; gap: 10px;
}
#page-loader .spinner { width: 28px; height: 28px; border-width: 3px; border-color: rgba(228,185,76,0.3); border-top-color: var(--gold); }
#page-loader.hidden { display: none; }
#page-loader p { color: var(--muted); font-size: 13px; }

/* ---------- Utility ---------- */
.flex { display: flex; }
.gap-8 { gap: 8px; } .gap-12 { gap: 12px; }
.mt-8 { margin-top: 8px; } .mt-16 { margin-top: 16px; }
.muted { color: var(--muted); }
.text-sm { font-size: 12.5px; }
.text-center { text-align: center; }
.empty-state { color: var(--muted); font-size: 13.5px; padding: 20px 0; text-align: center; }

/* ---------- Mobile ---------- */
@media (max-width: 760px) {
  .app-shell { flex-direction: column; }
  .sidebar { width: 100%; flex-direction: row; overflow-x: auto; padding: 10px; align-items: center; -webkit-overflow-scrolling: touch; }
  .sidebar .brand, .sidebar .userline { display: none; }
  .nav-spacer { display: none; }
  .nav-item { white-space: nowrap; width: auto; }
  .main-area { padding: 18px 16px; }
  .slot-grid { grid-template-columns: repeat(auto-fill, minmax(84px, 1fr)); }

  /* Calendar + slot panel stack instead of squeezing side-by-side. */
  .booking-layout { grid-template-columns: 1fr; }

  /* iOS Safari auto-zooms the page when focusing an input smaller than
     16px — bump it up on mobile only, so typing a username/password or
     filling the booking form doesn't trigger an unwanted zoom-in. */
  input, select, textarea { font-size: 16px; }

  /* Tighter modal padding leaves more room for content on small screens. */
  .modal-box { padding: 18px; }
  .login-card { padding: 24px; }

  /* Stat cards and form fields go full-width instead of a cramped grid. */
  .stat-grid { grid-template-columns: 1fr 1fr; }
  .form-row .field { min-width: 100%; }
}

@media (max-width: 420px) {
  .stat-grid { grid-template-columns: 1fr; }
}