/* ============================================================
   CSS DESIGN SYSTEM — คลินิกวิชาการ PCSHSPT
   โรงเรียนวิทยาศาสตร์จุฬาภรณราชวิทยาลัย ปทุมธานี
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Sarabun:wght@300;400;500;600;700;800&family=Kanit:wght@400;500;600;700&display=swap');

/* ─── TOKENS ─────────────────────────────────────── */
:root {
  --blue-deep:   #0d3b6e;
  --blue-main:   #1a5fa8;
  --blue-light:  #3b82f6;
  --blue-pale:   #dbeafe;
  --gold-main:   #d97706;
  --gold-light:  #fbbf24;
  --gold-pale:   #fef3c7;
  --green-main:  #059669;
  --green-light: #34d399;
  --green-pale:  #d1fae5;
  --red-main:    #dc2626;
  --red-pale:    #fee2e2;
  --gray-900:    #111827;
  --gray-800:    #1f2937;
  --gray-700:    #374151;
  --gray-600:    #4b5563;
  --gray-500:    #6b7280;
  --gray-400:    #9ca3af;
  --gray-300:    #d1d5db;
  --gray-200:    #e5e7eb;
  --gray-100:    #f3f4f6;
  --gray-50:     #f9fafb;
  --white:       #ffffff;
  --shadow-sm:   0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.06);
  --shadow-md:   0 4px 12px rgba(0,0,0,.10), 0 2px 6px rgba(0,0,0,.06);
  --shadow-lg:   0 10px 30px rgba(0,0,0,.12), 0 4px 12px rgba(0,0,0,.08);
  --shadow-xl:   0 20px 50px rgba(0,0,0,.15);
  --radius-sm:   6px;
  --radius-md:   12px;
  --radius-lg:   18px;
  --radius-xl:   24px;
  --transition:  all .25s cubic-bezier(.4,0,.2,1);
}

/* ─── RESET ──────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Sarabun', sans-serif;
  font-size: 15px;
  color: var(--gray-800);
  background: var(--gray-50);
  line-height: 1.6;
  min-height: 100vh;
}

/* ─── TYPOGRAPHY ─────────────────────────────────── */
h1, h2, h3, h4 { font-family: 'Kanit', sans-serif; line-height: 1.3; }
h1 { font-size: clamp(1.4rem, 3vw, 2rem); }
h2 { font-size: clamp(1.1rem, 2vw, 1.5rem); }
h3 { font-size: 1.1rem; }

/* ─── NAVBAR ─────────────────────────────────────── */
.navbar {
  background: linear-gradient(135deg, var(--blue-deep) 0%, var(--blue-main) 100%);
  color: var(--white);
  box-shadow: var(--shadow-lg);
  position: sticky;
  top: 0;
  z-index: 100;
}
.navbar-inner {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  gap: 16px;
  min-height: 72px;
}
.navbar-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 1;
}
.navbar-logo {
  width: 52px;
  height: 52px;
  object-fit: contain;
  filter: drop-shadow(0 2px 4px rgba(0,0,0,.3));
}
.navbar-title h1 {
  font-size: clamp(.85rem, 1.8vw, 1.1rem);
  font-weight: 700;
  color: var(--white);
  line-height: 1.2;
  font-family: 'Kanit', sans-serif;
}
.navbar-title p {
  font-size: .75rem;
  color: rgba(255,255,255,.75);
  margin-top: 1px;
}
.navbar-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav-link {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: var(--radius-md);
  color: rgba(255,255,255,.85);
  text-decoration: none;
  font-size: .875rem;
  font-weight: 500;
  transition: var(--transition);
  white-space: nowrap;
}
.nav-link:hover, .nav-link.active {
  background: rgba(255,255,255,.18);
  color: var(--white);
}
.nav-link.active { background: rgba(255,255,255,.22); }
.nav-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: var(--radius-md);
  font-size: .875rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: var(--transition);
  text-decoration: none;
}
.nav-btn-login {
  background: rgba(255,255,255,.15);
  color: var(--white);
  border: 1.5px solid rgba(255,255,255,.4);
}
.nav-btn-login:hover {
  background: rgba(255,255,255,.25);
}
.nav-btn-logout {
  background: var(--red-main);
  color: var(--white);
}
.nav-btn-logout:hover { background: #b91c1c; }

/* ─── HERO BANNER ────────────────────────────────── */
.hero {
  background: linear-gradient(135deg, var(--blue-deep) 0%, var(--blue-main) 60%, #1e40af 100%);
  color: var(--white);
  padding: 32px 24px;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.04'%3E%3Ccircle cx='30' cy='30' r='20'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  opacity: 0.5;
}
.hero-inner {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 20px;
  position: relative;
}
.hero-logo-img {
  width: 52px;
  height: 52px;
  object-fit: contain;
  filter: drop-shadow(0 2px 5px rgba(0,0,0,.25));
  flex-shrink: 0;
  border-radius: var(--radius-md);
  background: rgba(255,255,255,.95);
  padding: 3px;
}
.hero-badge {
  background: rgba(255,255,255,.12);
  border: 1px solid rgba(255,255,255,.25);
  backdrop-filter: blur(10px);
  border-radius: var(--radius-lg);
  padding: 10px 14px;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 2rem;
}
.hero-text h1 {
  font-size: clamp(1.2rem, 3vw, 1.8rem);
  font-weight: 800;
  color: var(--white);
  font-family: 'Kanit', sans-serif;
}
.hero-text p {
  color: rgba(255,255,255,.8);
  font-size: .9rem;
  margin-top: 4px;
}
.hero-sub {
  background: var(--gold-light);
  color: var(--blue-deep);
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: .8rem;
  display: inline-block;
  margin-top: 8px;
}

/* ─── MAIN CONTAINER ─────────────────────────────── */
.main-content {
  max-width: 1400px;
  margin: 0 auto;
  padding: 28px 24px;
}

/* ─── CARD ───────────────────────────────────────── */
.card {
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--gray-200);
  overflow: hidden;
}
.card-header {
  padding: 18px 24px;
  border-bottom: 1px solid var(--gray-200);
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--gray-50);
}
.card-body { padding: 24px; }

/* ─── WEEK NAV ───────────────────────────────────── */
.week-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--gray-200);
  padding: 14px 20px;
  margin-bottom: 20px;
  gap: 12px;
}
.week-nav-center {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: 'Kanit', sans-serif;
  font-weight: 600;
  font-size: 1rem;
  color: var(--blue-deep);
}
.week-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: var(--radius-md);
  border: 1.5px solid var(--gray-300);
  background: var(--white);
  color: var(--gray-700);
  font-size: .875rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  font-family: 'Sarabun', sans-serif;
}
.week-btn:hover {
  border-color: var(--blue-main);
  color: var(--blue-main);
  background: var(--blue-pale);
}
.week-btn:disabled {
  opacity: .45;
  cursor: not-allowed;
}

/* ─── GRADE TABS ─────────────────────────────────── */
.grade-tabs {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}
.grade-tab {
  padding: 8px 18px;
  border-radius: 24px;
  border: 2px solid var(--gray-300);
  background: var(--white);
  color: var(--gray-600);
  font-size: .875rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  font-family: 'Kanit', sans-serif;
}
.grade-tab:hover {
  border-color: var(--blue-light);
  color: var(--blue-main);
}
.grade-tab.active {
  background: var(--blue-main);
  border-color: var(--blue-main);
  color: var(--white);
  box-shadow: 0 4px 12px rgba(26,95,168,.3);
}

/* ─── DAY CARDS ──────────────────────────────────── */
.days-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
}
@media (max-width: 1100px) { .days-grid { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 700px)  { .days-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 460px)  { .days-grid { grid-template-columns: 1fr; } }

.day-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  border: 2px solid var(--gray-200);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: var(--transition);
  cursor: pointer;
}
.day-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  border-color: var(--blue-light);
}
.day-card.today {
  border-color: var(--blue-main);
  box-shadow: 0 0 0 3px rgba(26,95,168,.12), var(--shadow-md);
}
.day-card-header {
  padding: 12px 16px 10px;
  background: linear-gradient(135deg, var(--blue-main) 0%, var(--blue-deep) 100%);
  color: var(--white);
  position: relative;
}
.day-card-header.today-hdr {
  background: linear-gradient(135deg, #1d4ed8 0%, #1e40af 100%);
}
.day-name {
  font-family: 'Kanit', sans-serif;
  font-size: 1.05rem;
  font-weight: 700;
}
.day-date { font-size: .75rem; color: rgba(255,255,255,.8); margin-top: 2px; }
.day-duty-staff {
  margin-top: 8px;
  padding: 5px 9px;
  background: rgba(0, 0, 0, 0.18);
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: var(--radius-sm);
  font-size: .76rem;
  color: var(--white);
  display: flex;
  align-items: center;
  gap: 5px;
  backdrop-filter: blur(4px);
}
.day-duty-staff .duty-icon { font-size: .85rem; flex-shrink: 0; }
.day-duty-staff .duty-label { opacity: 0.9; font-weight: 500; font-size: .72rem; }
.day-duty-staff .duty-name {
  font-weight: 700;
  color: #fde047;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.today-badge {
  position: absolute;
  top: 10px; right: 10px;
  background: var(--gold-light);
  color: var(--blue-deep);
  font-size: .65rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 12px;
}
.day-card-body { padding: 14px; }
.clinic-slot {
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  border-left: 3px solid var(--blue-light);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  margin-bottom: 8px;
  transition: var(--transition);
}
.clinic-slot:last-child { margin-bottom: 0; }
.clinic-slot:hover { border-left-color: var(--blue-main); background: var(--blue-pale); }
.clinic-subject {
  font-family: 'Kanit', sans-serif;
  font-size: .95rem;
  font-weight: 600;
  color: var(--blue-deep);
  margin-bottom: 4px;
}
.clinic-meta {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: .75rem;
  color: var(--gray-500);
  flex-wrap: wrap;
}
.clinic-meta span { display: flex; align-items: center; gap: 3px; }
.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  border-radius: 12px;
  font-size: .72rem;
  font-weight: 600;
  margin-top: 6px;
}
.status-active   { background: var(--green-pale); color: var(--green-main); }
.status-cancelled{ background: var(--red-pale);   color: var(--red-main); }
.status-pending  { background: var(--gold-pale);  color: var(--gold-main); }
.no-clinic {
  text-align: center;
  padding: 20px 10px;
  color: var(--gray-400);
  font-size: .85rem;
}
.no-clinic-icon { font-size: 1.5rem; margin-bottom: 4px; }

/* ─── MULTI-WEEK VIEW ────────────────────────────── */
.multi-week-section {
  margin-bottom: 28px;
}
.week-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  background: linear-gradient(135deg, var(--blue-deep), var(--blue-main));
  color: var(--white);
  border-radius: var(--radius-md);
  margin-bottom: 14px;
  font-family: 'Kanit', sans-serif;
  font-weight: 600;
}

/* ─── SUMMARY STATS ──────────────────────────────── */
.stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin-bottom: 24px;
}
@media (max-width: 900px) { .stats-row { grid-template-columns: repeat(2,1fr); } }
@media (max-width: 480px) { .stats-row { grid-template-columns: 1fr 1fr; } }
.stat-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 18px 20px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--gray-200);
  display: flex;
  align-items: center;
  gap: 14px;
  transition: var(--transition);
}
.stat-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.stat-icon {
  width: 46px; height: 46px;
  border-radius: var(--radius-md);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.4rem;
  flex-shrink: 0;
}
.stat-icon.blue   { background: var(--blue-pale); }
.stat-icon.green  { background: var(--green-pale); }
.stat-icon.gold   { background: var(--gold-pale); }
.stat-icon.red    { background: var(--red-pale); }
.stat-num {
  font-family: 'Kanit', sans-serif;
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--blue-deep);
  line-height: 1;
}
.stat-label { font-size: .78rem; color: var(--gray-500); margin-top: 2px; }

/* ─── TABLE ──────────────────────────────────────── */
.table-wrapper { overflow-x: auto; border-radius: var(--radius-md); }
table {
  width: 100%;
  border-collapse: collapse;
  font-size: .88rem;
}
th {
  background: var(--blue-deep);
  color: var(--white);
  padding: 11px 14px;
  text-align: left;
  font-family: 'Kanit', sans-serif;
  font-weight: 600;
  white-space: nowrap;
}
th:first-child { border-radius: var(--radius-sm) 0 0 0; }
th:last-child  { border-radius: 0 var(--radius-sm) 0 0; }
td { padding: 10px 14px; border-bottom: 1px solid var(--gray-200); vertical-align: middle; }
tr:last-child td { border-bottom: none; }
tr:hover td { background: var(--gray-50); }
tr:nth-child(even) td { background: #fafbfc; }
tr:nth-child(even):hover td { background: var(--gray-100); }

/* ─── FILTER BAR ─────────────────────────────────── */
.filter-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 20px;
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 14px 18px;
  box-shadow: var(--shadow-sm);
}
.filter-label {
  font-weight: 600;
  font-size: .85rem;
  color: var(--gray-600);
  white-space: nowrap;
}
.filter-select, .filter-input {
  padding: 7px 12px;
  border: 1.5px solid var(--gray-300);
  border-radius: var(--radius-md);
  font-family: 'Sarabun', sans-serif;
  font-size: .875rem;
  color: var(--gray-800);
  background: var(--white);
  outline: none;
  transition: var(--transition);
  cursor: pointer;
}
.filter-select:focus, .filter-input:focus {
  border-color: var(--blue-main);
  box-shadow: 0 0 0 3px rgba(26,95,168,.12);
}
.filter-chip {
  padding: 6px 14px;
  border-radius: 20px;
  border: 1.5px solid var(--gray-300);
  background: var(--white);
  color: var(--gray-600);
  font-size: .82rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}
.filter-chip:hover { border-color: var(--blue-main); color: var(--blue-main); }
.filter-chip.active {
  background: var(--blue-main);
  border-color: var(--blue-main);
  color: var(--white);
}

/* ─── BUTTONS ────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 18px;
  border-radius: var(--radius-md);
  font-family: 'Sarabun', sans-serif;
  font-size: .875rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: var(--transition);
  text-decoration: none;
}
.btn-primary   { background: var(--blue-main);  color: var(--white); }
.btn-primary:hover { background: var(--blue-deep); }
.btn-success   { background: var(--green-main); color: var(--white); }
.btn-success:hover { background: #047857; }
.btn-danger    { background: var(--red-main);   color: var(--white); }
.btn-danger:hover { background: #b91c1c; }
.btn-outline   { background: transparent; border: 1.5px solid var(--gray-300); color: var(--gray-700); }
.btn-outline:hover { border-color: var(--blue-main); color: var(--blue-main); background: var(--blue-pale); }
.btn-gold      { background: var(--gold-main); color: var(--white); }
.btn-gold:hover{ background: #b45309; }
.btn-sm { padding: 6px 12px; font-size: .8rem; }
.btn-lg { padding: 12px 24px; font-size: 1rem; }

/* ─── FORM ───────────────────────────────────────── */
.form-group { margin-bottom: 18px; }
.form-label {
  display: block;
  font-size: .875rem;
  font-weight: 600;
  color: var(--gray-700);
  margin-bottom: 6px;
}
.form-control {
  width: 100%;
  padding: 10px 14px;
  border: 1.5px solid var(--gray-300);
  border-radius: var(--radius-md);
  font-family: 'Sarabun', sans-serif;
  font-size: .9rem;
  color: var(--gray-800);
  background: var(--white);
  outline: none;
  transition: var(--transition);
}
.form-control:focus {
  border-color: var(--blue-main);
  box-shadow: 0 0 0 3px rgba(26,95,168,.12);
}
.form-control::placeholder { color: var(--gray-400); }
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
@media (max-width: 600px) { .form-row { grid-template-columns: 1fr; } }

/* ─── MODAL ──────────────────────────────────────── */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.55);
  backdrop-filter: blur(4px);
  z-index: 2000;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.modal-overlay.open { display: flex; }
.modal {
  background: var(--white);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  width: 100%;
  max-width: 560px;
  max-height: 90vh;
  max-height: calc(100dvh - 32px);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  animation: modalIn .25s ease;
}
@keyframes modalIn {
  from { opacity: 0; transform: scale(.95) translateY(10px); }
  to   { opacity: 1; transform: scale(1)  translateY(0);     }
}
.modal-header {
  padding: 20px 24px 16px;
  border-bottom: 1px solid var(--gray-200);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-shrink: 0;
}
.modal-title {
  font-family: 'Kanit', sans-serif;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--blue-deep);
}
.modal-close {
  width: 32px; height: 32px;
  border-radius: 50%;
  border: none;
  background: var(--gray-100);
  color: var(--gray-500);
  font-size: 1.1rem;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: var(--transition);
  flex-shrink: 0;
}
.modal-close:hover { background: var(--red-pale); color: var(--red-main); }
.modal-body  {
  padding: 20px 24px;
  flex: 1 1 auto;
  min-height: 0;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}
.modal-footer {
  padding: 14px 24px 20px;
  display: flex;
  gap: 10px;
  justify-content: flex-end;
  flex-shrink: 0;
}

/* ─── LOGIN PAGE ─────────────────────────────────── */
.login-page {
  min-height: 100vh;
  background: linear-gradient(135deg, var(--blue-deep) 0%, var(--blue-main) 50%, #1e40af 100%);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  padding: 24px 16px 16px;
  box-sizing: border-box;
}
.login-box {
  background: var(--white);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  padding: 40px;
  width: 100%;
  max-width: 420px;
  animation: fadeUp .4s ease;
  margin: auto 0;
}
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}
.login-logo {
  text-align: center;
  margin-bottom: 28px;
}
.login-logo img { width: 80px; height: 80px; object-fit: contain; }
.login-logo h2 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--blue-deep);
  margin-top: 12px;
}
.login-logo p { font-size: .8rem; color: var(--gray-500); margin-top: 2px; }

/* ─── TOAST ──────────────────────────────────────── */
.toast-container {
  position: fixed;
  top: 20px; right: 20px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.toast {
  background: var(--white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  border-left: 4px solid var(--blue-main);
  padding: 14px 18px;
  min-width: 260px;
  max-width: 360px;
  display: flex;
  align-items: flex-start;
  gap: 10px;
  animation: slideIn .3s ease;
}
.toast.success { border-left-color: var(--green-main); }
.toast.error   { border-left-color: var(--red-main); }
.toast.warning { border-left-color: var(--gold-main); }
@keyframes slideIn {
  from { opacity: 0; transform: translateX(20px); }
  to   { opacity: 1; transform: translateX(0); }
}
.toast-icon  { font-size: 1.1rem; flex-shrink: 0; margin-top: 1px; }
.toast-title { font-weight: 700; font-size: .875rem; color: var(--gray-800); }
.toast-msg   { font-size: .8rem; color: var(--gray-600); margin-top: 2px; }

/* ─── EMPTY STATE ────────────────────────────────── */
.empty-state {
  text-align: center;
  padding: 48px 24px;
  color: var(--gray-500);
}
.empty-icon { font-size: 3rem; margin-bottom: 12px; }
.empty-title { font-family: 'Kanit', sans-serif; font-size: 1.1rem; color: var(--gray-700); margin-bottom: 6px; }
.empty-sub   { font-size: .875rem; }

/* ─── FOOTER ─────────────────────────────────────── */
footer {
  background: var(--blue-deep);
  color: rgba(255, 255, 255, .8);
  text-align: center;
  padding: 16px 20px;
  font-size: .85rem;
  margin-top: 40px;
  border-top: 2px solid rgba(251, 191, 36, 0.35);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
}
footer strong { color: var(--white); }
.footer-school {
  font-family: 'Kanit', sans-serif;
  font-size: 0.86rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.95);
  letter-spacing: 0.2px;
}
.footer-dev {
  font-family: 'Sarabun', sans-serif;
  font-size: 0.72rem;
  color: rgba(255, 255, 255, 0.65);
  font-weight: 300;
  letter-spacing: 0.2px;
}
.login-footer {
  background: transparent;
  border-top: none;
  margin-top: 16px;
  padding: 8px 16px;
}

/* ─── SECTION HEADER ─────────────────────────────── */
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
  flex-wrap: wrap;
  gap: 10px;
}
.section-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: 'Kanit', sans-serif;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--blue-deep);
}
.section-title-icon {
  width: 38px; height: 38px;
  border-radius: var(--radius-md);
  background: var(--blue-pale);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem;
}

/* ─── BADGE ──────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 10px;
  border-radius: 12px;
  font-size: .75rem;
  font-weight: 600;
}
.badge-blue   { background: var(--blue-pale);   color: var(--blue-main); }
.badge-green  { background: var(--green-pale);  color: var(--green-main); }
.badge-gold   { background: var(--gold-pale);   color: var(--gold-main); }
.badge-red    { background: var(--red-pale);    color: var(--red-main); }
.badge-gray   { background: var(--gray-200);    color: var(--gray-600); }

/* ─── TABS ───────────────────────────────────────── */
.tab-bar {
  display: flex;
  gap: 4px;
  border-bottom: 2px solid var(--gray-200);
  margin-bottom: 24px;
  overflow-x: auto;
  padding-bottom: 0;
}
.tab-btn {
  padding: 10px 18px;
  border: none;
  background: none;
  font-family: 'Kanit', sans-serif;
  font-size: .9rem;
  font-weight: 600;
  color: var(--gray-500);
  cursor: pointer;
  border-bottom: 3px solid transparent;
  margin-bottom: -2px;
  transition: var(--transition);
  white-space: nowrap;
}
.tab-btn:hover { color: var(--blue-main); }
.tab-btn.active {
  color: var(--blue-main);
  border-bottom-color: var(--blue-main);
}

/* ─── ALERT ──────────────────────────────────────── */
.alert {
  padding: 12px 16px;
  border-radius: var(--radius-md);
  font-size: .875rem;
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 16px;
}
.alert-info    { background: var(--blue-pale);  color: var(--blue-deep);  border: 1px solid #93c5fd; }
.alert-success { background: var(--green-pale); color: #065f46; border: 1px solid #6ee7b7; }
.alert-warning { background: var(--gold-pale);  color: #78350f; border: 1px solid #fcd34d; }
.alert-danger  { background: var(--red-pale);   color: #7f1d1d; border: 1px solid #fca5a5; }

/* ─── SPINNER ────────────────────────────────────── */
.spinner {
  display: inline-block;
  width: 20px; height: 20px;
  border: 3px solid var(--gray-300);
  border-top-color: var(--blue-main);
  border-radius: 50%;
  animation: spin .7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ─── LOADING OVERLAY ────────────────────────────── */
.loading-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(255,255,255,.85);
  z-index: 9998;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 14px;
}
.loading-overlay.show { display: flex; }
.loading-text { font-family: 'Kanit', sans-serif; color: var(--blue-main); font-size: 1rem; }

/* ─── UTILS ──────────────────────────────────────── */
.flex           { display: flex; }
.items-center   { align-items: center; }
.justify-between{ justify-content: space-between; }
.gap-2          { gap: 8px; }
.gap-3          { gap: 12px; }
.mt-1           { margin-top: 4px; }
.mt-2           { margin-top: 8px; }
.mt-3           { margin-top: 12px; }
.mt-4           { margin-top: 16px; }
.mb-2           { margin-bottom: 8px; }
.mb-3           { margin-bottom: 12px; }
.mb-4           { margin-bottom: 16px; }
.text-sm        { font-size: .875rem; }
.text-xs        { font-size: .75rem; }
.text-muted     { color: var(--gray-500); }
.text-blue      { color: var(--blue-main); }
.text-green     { color: var(--green-main); }
.text-red       { color: var(--red-main); }
.font-bold      { font-weight: 700; }
.font-semibold  { font-weight: 600; }
.w-full         { width: 100%; }
.rounded        { border-radius: var(--radius-md); }
.hidden         { display: none !important; }
.truncate       { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* ─── TABLE FIXED ALIGNMENT ─────────────────────── */
.table-fixed {
  table-layout: fixed !important;
  width: 100% !important;
}
.table-fixed th, .table-fixed td {
  overflow: hidden;
  text-overflow: ellipsis;
  vertical-align: middle;
}

/* ─── MULTI-ROOM / CHIP SELECTOR ─────────────────── */
.room-selector-group {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
}
.room-chip-btn {
  padding: 5px 12px;
  border-radius: 16px;
  border: 1.5px solid var(--gray-300);
  background: var(--white);
  color: var(--gray-700);
  font-size: .8rem;
  font-weight: 600;
  cursor: pointer;
  transition: all .15s ease;
  user-select: none;
}
.room-chip-btn:hover {
  border-color: var(--blue-main);
  color: var(--blue-main);
}
.room-chip-btn.active {
  background: var(--blue-main);
  border-color: var(--blue-main);
  color: var(--white);
}

/* ─── MULTI-WEEK PICKER ──────────────────────────── */
.multi-week-picker {
  background: var(--white);
  border: 1.5px solid var(--blue-pale);
  border-radius: var(--radius-lg);
  padding: 12px 16px;
  margin-bottom: 16px;
  box-shadow: var(--shadow-sm);
}
.week-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: 20px;
  border: 1.5px solid var(--gray-200);
  background: var(--gray-50);
  font-size: .82rem;
  font-weight: 500;
  color: var(--gray-700);
  cursor: pointer;
  transition: all .15s ease;
  user-select: none;
}
.week-pill:hover {
  border-color: var(--blue-light);
  background: var(--blue-pale);
}
.week-pill.selected {
  background: var(--blue-main);
  border-color: var(--blue-main);
  color: var(--white);
  font-weight: 600;
}

/* ─── NO-CLASSES NOTICE BANNER ───────────────────── */
.no-classes-card {
  background: linear-gradient(135deg, #fff1f2 0%, #ffe4e6 100%);
  border: 2px dashed #f43f5e;
  border-radius: var(--radius-xl);
  padding: 40px 24px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  margin-bottom: 20px;
}
.no-classes-card .icon {
  font-size: 3rem;
  margin-bottom: 12px;
}
.no-classes-card .title {
  font-family: 'Kanit', sans-serif;
  font-size: 1.35rem;
  font-weight: 700;
  color: #9f1239;
  margin-bottom: 6px;
}
.no-classes-card .sub {
  color: #be123c;
  font-size: .95rem;
}

/* ─── RESPONSIVE & MOBILE NAVBAR OPTIMIZATIONS ─── */
.brand-title-short {
  display: none;
}

@media (max-width: 900px), (max-height: 520px) {
  .brand-title-full {
    display: none !important;
  }
  .brand-title-short {
    display: block !important;
  }
}

/* ─── MOBILE PORTRAIT (<= 768px) ─── */
@media (max-width: 768px) {
  .navbar-inner {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    min-height: auto;
    padding: 8px 12px 6px;
    gap: 6px;
  }
  .navbar-brand {
    display: flex;
    align-items: center;
    gap: 8px;
    width: 100%;
    min-width: 0;
  }
  .navbar-logo {
    width: 32px;
    height: 32px;
    flex-shrink: 0;
  }
  .navbar-title {
    flex: 1;
    min-width: 0;
  }
  .navbar-title h1 {
    font-size: 0.92rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin: 0;
    line-height: 1.2;
  }
  .navbar-title p {
    display: none;
  }
  .navbar-nav {
    display: flex;
    flex-direction: row;
    flex-wrap: nowrap;
    align-items: center;
    justify-content: flex-start; /* CRITICAL: Must be flex-start */
    overflow-x: auto;
    overflow-y: hidden;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    gap: 4px;
    width: 100%;
    min-width: 0;
    padding: 2px 0 4px;
  }
  .navbar-nav::-webkit-scrollbar {
    display: none;
  }
  .nav-link, .nav-btn {
    padding: 5px 9px;
    font-size: 0.78rem;
    white-space: nowrap;
    flex-shrink: 0;
    border-radius: 6px;
    line-height: 1.2;
    height: 30px;
    box-sizing: border-box;
  }
  #nav-user-info {
    font-size: 0.78rem;
    padding: 2px 6px;
    white-space: nowrap;
    flex-shrink: 0;
  }
  .main-content { padding: 14px 12px; }
  .card-body { padding: 16px; }
  .modal-overlay { padding: 10px; }
  .modal { max-width: 100%; border-radius: var(--radius-lg); max-height: calc(100dvh - 20px); }
  .modal-header { padding: 12px 14px; }
  .modal-body { padding: 12px 14px; }
  .modal-footer { padding: 10px 14px; }
  .login-box { padding: 24px 16px; }
}

/* ─── ULTRA-STABLE MOBILE LANDSCAPE NAVBAR ───
   Targets phones & small tablets rotated horizontally (height <= 520px) */
@media (max-height: 520px) and (orientation: landscape), (max-width: 950px) and (max-height: 520px) {
  .navbar {
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.25);
  }
  .navbar-inner {
    display: flex !important;
    flex-direction: row !important;
    flex-wrap: nowrap !important;
    align-items: center !important;
    justify-content: flex-start !important; /* CRITICAL */
    min-height: 44px !important;
    height: 44px !important;
    padding: 0 10px !important;
    gap: 10px !important;
    width: 100% !important;
    box-sizing: border-box !important;
  }
  .navbar-brand {
    display: flex !important;
    align-items: center !important;
    gap: 6px !important;
    flex: 0 0 auto !important;
    max-width: 190px !important;
    min-width: 0 !important;
    overflow: hidden !important;
    margin: 0 !important;
  }
  .navbar-logo {
    width: 26px !important;
    height: 26px !important;
    flex-shrink: 0 !important;
    border-radius: 4px !important;
  }
  .navbar-title {
    flex: 1 !important;
    min-width: 0 !important;
    overflow: hidden !important;
  }
  .navbar-title h1 {
    font-size: 0.8rem !important;
    line-height: 1.1 !important;
    white-space: nowrap !important;
    overflow: hidden !important;
    text-overflow: ellipsis !important;
    margin: 0 !important;
  }
  .navbar-title p {
    display: none !important;
  }
  .navbar-nav {
    display: flex !important;
    flex-direction: row !important;
    flex-wrap: nowrap !important;
    align-items: center !important;
    justify-content: flex-start !important; /* CRITICAL: Never flex-end, ensures first item is always visible */
    flex: 1 1 auto !important; /* Takes all remaining width without overlap */
    min-width: 0 !important;   /* Allows scrolling without overflowing screen */
    max-width: none !important; /* No fixed calc */
    width: auto !important;
    overflow-x: auto !important;
    overflow-y: hidden !important;
    -webkit-overflow-scrolling: touch !important;
    scrollbar-width: none !important;
    gap: 4px !important;
    padding: 0 2px !important;
    margin: 0 !important;
  }
  .navbar-nav::-webkit-scrollbar {
    display: none !important;
  }
  .nav-link, .nav-btn {
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
    padding: 4px 8px !important;
    font-size: 0.75rem !important;
    white-space: nowrap !important;
    line-height: 1.2 !important;
    flex-shrink: 0 !important;
    height: 30px !important;
    box-sizing: border-box !important;
    border-radius: 5px !important;
  }
  #nav-user-info {
    font-size: 0.75rem !important;
    padding: 2px 6px !important;
    white-space: nowrap !important;
    flex-shrink: 0 !important;
  }
  .main-content {
    padding: 8px 10px !important;
  }
}