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

:root {
  /* ODeX-style navy + blue palette */
  --navy:       #0b1f3a;
  --navy-mid:   #163354;
  --navy-light: #1e4a7a;
  --blue:       #1565c0;
  --blue-mid:   #1976d2;
  --blue-bright:#2196f3;
  --blue-light: #e3f2fd;
  --blue-pale:  #f0f7ff;

  /* Neutral / text */
  --text-dark:  #0d1b2a;
  --text-mid:   #334155;
  --text-mute:  #64748b;
  --text-light: #94a3b8;

  /* UI surfaces */
  --white:      #ffffff;
  --bg:         #f0f4f8;
  --border:     #d0dce8;
  --border-mid: #b8cce0;

  /* Status */
  --green:      #1b7c4a;
  --green-bg:   #e8f5ee;
  --green-bd:   #a7d9bc;
  --red:        #b91c1c;
  --red-bg:     #fef2f2;
  --red-bd:     #fca5a5;

  --radius:     4px;
  --radius-md:  6px;
  --shadow-sm:  0 1px 4px rgba(11,31,58,.08);
  --shadow:     0 2px 10px rgba(11,31,58,.10);
  --shadow-lg:  0 6px 24px rgba(11,31,58,.14);
}

html { font-size: 16px; }

body {
  font-family: 'Inter', 'Segoe UI', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text-dark);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ── Noise — hidden for clean enterprise look ─────────── */
.noise { display: none; }

/* ── Header — ODeX deep navy bar ─────────────────────── */
header {
  position: relative; z-index: 10;
  display: flex; align-items: center; gap: 12px;
  padding: 0 40px;
  height: 56px;
  background: var(--navy);
  border-bottom: 3px solid var(--blue-bright);
  box-shadow: 0 2px 8px rgba(0,0,0,.25);
}

.logo {
  font-size: 22px;
  color: var(--blue-bright);
  line-height: 1;
}

.header-text { display: flex; flex-direction: column; gap: 1px; }

.brand {
  font-family: 'Inter', sans-serif;
  font-size: 15px; font-weight: 700;
  letter-spacing: .12em;
  color: #ffffff;
}

.tagline {
  font-size: 9px;
  color: #90b8d8;
  letter-spacing: .12em;
  text-transform: uppercase;
}

/* ── Breadcrumb sub-bar ───────────────────────────────── */
header::after {
  content: 'Home  /  Bookings  /  Schedule a Session';
  position: absolute; bottom: -26px; left: 40px;
  font-size: 11px; color: var(--text-mute);
  letter-spacing: .02em;
  pointer-events: none;
}

/* ── Main Layout ─────────────────────────────────────── */
main {
  position: relative; z-index: 5;
  flex: 1;
  display: grid;
  grid-template-columns: 400px 1fr;
  gap: 0;
  max-width: 980px;
  width: 100%;
  margin: 52px auto 40px;
  padding: 0 24px;
}

/* ── Panels ──────────────────────────────────────────── */
.panel {
  background: var(--white);
  border: 1px solid var(--border);
  padding: 28px;
  box-shadow: var(--shadow);
}

.calendar-panel {
  border-radius: var(--radius-md) 0 0 var(--radius-md);
  border-right: none;
}
.booking-panel {
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  border-left: 1px solid var(--border-mid);
}

.panel-label {
  font-size: 10px; font-weight: 600;
  letter-spacing: .18em; text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 20px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--blue-light);
  display: flex; align-items: center; gap: 8px;
}
.panel-label::before {
  content: '';
  display: inline-block;
  width: 3px; height: 12px;
  background: var(--blue-bright);
  border-radius: 2px;
}

/* ── Calendar Nav ────────────────────────────────────── */
.cal-nav {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 16px;
  padding: 8px 12px;
  background: var(--blue-pale);
  border: 1px solid var(--blue-light);
  border-radius: var(--radius);
}

.cal-nav h2 {
  font-size: 14px; font-weight: 600;
  color: var(--navy); letter-spacing: .02em;
}

.cal-nav button {
  background: var(--white);
  border: 1px solid var(--border);
  width: 28px; height: 28px; border-radius: var(--radius);
  cursor: pointer; color: var(--blue);
  font-size: 13px; display: flex; align-items: center; justify-content: center;
  transition: all .15s;
  box-shadow: var(--shadow-sm);
}
.cal-nav button:hover:not([disabled]) {
  background: var(--blue);
  color: #fff;
  border-color: var(--blue);
}
.cal-nav button[disabled] { opacity: .3; cursor: not-allowed; }

/* ── Weekday labels ──────────────────────────────────── */
.cal-weekdays {
  display: grid; grid-template-columns: repeat(7, 1fr);
  gap: 3px; margin-bottom: 6px;
  background: var(--navy);
  border-radius: var(--radius);
  padding: 5px 2px;
  text-align: center;
}
.cal-weekdays span {
  font-size: 9px; font-weight: 600;
  letter-spacing: .08em;
  color: #90b8d8; text-transform: uppercase;
  padding: 2px 0;
}

/* ── Day cells ───────────────────────────────────────── */
.cal-days {
  display: grid; grid-template-columns: repeat(7, 1fr);
  gap: 3px;
}

.cal-day {
  aspect-ratio: 1; display: flex; align-items: center; justify-content: center;
  font-size: 12px; font-weight: 400;
  border-radius: var(--radius);
  cursor: pointer; border: 1px solid transparent;
  transition: all .12s; color: var(--text-dark);
}

.cal-day:hover:not(.disabled):not(.empty) {
  background: var(--blue-light);
  border-color: var(--blue-bright);
  color: var(--blue);
  font-weight: 500;
}

.cal-day.today {
  font-weight: 700;
  color: var(--white);
  background: var(--blue-mid);
  border-color: var(--blue);
}

.cal-day.selected {
  background: var(--navy);
  color: #ffffff;
  border-color: var(--navy);
  font-weight: 600;
  box-shadow: 0 1px 4px rgba(11,31,58,.3);
}

.cal-day.today.selected {
  background: var(--navy); border-color: var(--blue-bright);
  outline: 2px solid var(--blue-bright); outline-offset: 1px;
}

.cal-day.disabled {
  color: var(--border);
  cursor: not-allowed;
  background: transparent;
}

.cal-day.empty { cursor: default; }

.cal-day.non-session {
  color: var(--text-light);
  background: #fafbfc;
}

/* ── Legend ──────────────────────────────────────────── */
.legend {
  display: flex; gap: 16px; margin-top: 18px;
  padding-top: 14px;
  border-top: 1px solid var(--border);
}
.legend-item {
  display: flex; align-items: center; gap: 5px;
  font-size: 10px; color: var(--text-mute); font-weight: 500;
  letter-spacing: .03em;
}
.dot { width: 8px; height: 8px; border-radius: 2px; }
.dot.available { background: var(--green); }
.dot.booked    { background: var(--red); }
.dot.selected  { background: var(--navy); }

/* ── Booking Panel: Placeholder ──────────────────────── */
.placeholder {
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  text-align: center; height: 100%;
  gap: 10px;
  color: var(--text-mute);
}

.placeholder-icon {
  font-size: 40px; color: var(--border-mid);
  line-height: 1; margin-bottom: 4px;
}

.placeholder p { font-size: 13px; line-height: 1.75; color: var(--text-mute); }

.slot-note {
  font-size: 11px !important;
  color: var(--blue) !important;
  margin-top: 6px;
  padding: 8px 18px;
  border: 1px solid var(--blue-light);
  border-radius: var(--radius);
  background: var(--blue-pale);
  line-height: 1.7;
}

/* ── Selected Date Banner ────────────────────────────── */
.selected-date-display {
  display: flex; gap: 10px; align-items: center;
  margin-bottom: 20px;
  padding: 10px 14px;
  background: var(--navy);
  border-radius: var(--radius);
}
.date-label {
  font-size: 10px; font-weight: 600;
  color: #90b8d8; letter-spacing: .12em;
  text-transform: uppercase; white-space: nowrap;
}
#selected-date-text {
  font-size: 13px; font-weight: 600;
  color: #ffffff;
  letter-spacing: .01em;
}

/* ── Slots ───────────────────────────────────────────── */
.slots-label {
  font-size: 10px; font-weight: 600;
  letter-spacing: .14em; text-transform: uppercase;
  color: var(--text-mute); margin-bottom: 10px;
  display: flex; align-items: center; gap: 8px;
}
.tz-tag {
  background: var(--blue-light);
  padding: 2px 7px; border-radius: 3px;
  color: var(--blue); font-size: 9px;
  font-weight: 700; letter-spacing: .08em;
  border: 1px solid var(--blue-bright);
}

.slots-grid {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 8px; margin-bottom: 20px;
}

.slot-btn {
  padding: 12px 8px;
  border-radius: var(--radius); border: 1px solid transparent;
  font-family: 'Roboto Mono', 'Courier New', monospace;
  font-size: 11px; font-weight: 500;
  cursor: pointer; transition: all .15s;
  text-align: center; line-height: 1.5;
}

.slot-btn.available {
  background: var(--green-bg);
  border-color: var(--green-bd);
  color: var(--green);
}
.slot-btn.available:hover {
  background: var(--green);
  color: #fff; border-color: var(--green);
  box-shadow: 0 2px 6px rgba(27,124,74,.2);
}
.slot-btn.selected-slot {
  background: var(--blue);
  color: #fff; border-color: var(--blue-mid);
  box-shadow: 0 2px 8px rgba(21,101,192,.35);
}

.slot-btn.booked {
  background: var(--red-bg);
  border-color: var(--red-bd);
  color: var(--red);
  cursor: not-allowed; opacity: .65;
  text-decoration: line-through;
}

.slots-loading, .no-slots {
  font-size: 12px; color: var(--text-mute);
  text-align: center; padding: 24px;
  line-height: 1.75;
}

/* ── Form ────────────────────────────────────────────── */
.form-section { display: flex; flex-direction: column; gap: 14px; }

.selected-time-display {
  font-family: 'Roboto Mono', monospace;
  font-size: 12px; font-weight: 500;
  color: var(--blue);
  display: flex; align-items: center; gap: 8px;
  padding: 9px 12px;
  background: var(--blue-pale);
  border: 1px solid var(--blue-light);
  border-radius: var(--radius);
  border-left: 3px solid var(--blue-bright);
}

.form-group { display: flex; flex-direction: column; gap: 5px; }

label {
  font-size: 11px; font-weight: 600;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--text-mid);
}

input[type="text"], input[type="email"] {
  width: 100%; padding: 9px 12px;
  font-family: 'Inter', sans-serif; font-size: 13px;
  background: var(--white); color: var(--text-dark);
  border: 1px solid var(--border); border-radius: var(--radius);
  outline: none; transition: border-color .15s, box-shadow .15s;
}
input:focus {
  border-color: var(--blue-bright);
  box-shadow: 0 0 0 3px rgba(33,150,243,.12);
}
input::placeholder { color: var(--text-light); }

.book-btn {
  margin-top: 4px;
  padding: 11px;
  background: var(--blue); color: #fff;
  border: none; border-radius: var(--radius);
  font-family: 'Inter', sans-serif;
  font-size: 12px; font-weight: 700;
  letter-spacing: .1em; text-transform: uppercase;
  cursor: pointer; transition: all .15s;
  box-shadow: 0 2px 6px rgba(21,101,192,.3);
}
.book-btn:hover {
  background: var(--navy);
  box-shadow: 0 3px 10px rgba(11,31,58,.35);
}
.book-btn:disabled { opacity: .5; cursor: not-allowed; box-shadow: none; }

.error-msg {
  font-size: 11px; color: var(--red);
  background: var(--red-bg); border: 1px solid var(--red-bd);
  border-left: 3px solid var(--red);
  border-radius: var(--radius); padding: 9px 12px; line-height: 1.6;
}

/* ── Success Panel ───────────────────────────────────── */
.success-panel {
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  text-align: center; height: 100%;
  gap: 12px;
  animation: fadeIn .35s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}

.success-icon {
  width: 52px; height: 52px;
  background: var(--green); color: #fff;
  border-radius: 50%; display: flex;
  align-items: center; justify-content: center;
  font-size: 22px; margin-bottom: 4px;
  box-shadow: 0 3px 10px rgba(27,124,74,.3);
}

.success-panel h3 {
  font-size: 18px; font-weight: 700;
  color: var(--navy); letter-spacing: .01em;
}

.success-panel p {
  font-size: 12px; color: var(--text-mid); line-height: 1.75;
  max-width: 300px;
}

.success-note {
  font-size: 11px !important; color: var(--text-mute) !important;
  background: var(--blue-pale); border: 1px solid var(--blue-light);
  border-radius: var(--radius); padding: 8px 18px;
}

.new-booking-btn {
  margin-top: 6px;
  padding: 9px 22px;
  background: none;
  border: 1px solid var(--blue);
  border-radius: var(--radius);
  font-family: 'Inter', sans-serif;
  font-size: 11px; font-weight: 600;
  letter-spacing: .08em; text-transform: uppercase;
  cursor: pointer; color: var(--blue);
  transition: all .15s;
}
.new-booking-btn:hover {
  background: var(--blue); color: #fff;
  box-shadow: 0 2px 6px rgba(21,101,192,.25);
}

/* ── Utilities ───────────────────────────────────────── */
.hidden { display: none !important; }

/* ── Responsive ──────────────────────────────────────── */
@media (max-width: 768px) {
  header { padding: 0 16px; }
  header::after { left: 16px; }

  main {
    grid-template-columns: 1fr;
    margin: 40px auto 24px;
    padding: 0 14px;
    gap: 12px;
  }
  .panel {
    border-radius: var(--radius-md) !important;
    border: 1px solid var(--border) !important;
  }
  .booking-panel { min-height: 360px; }
}