/* ===================================================
   ระบบเช็คชื่อนักเรียนรายวัน - Stylesheet
   Modern, Clean, Mobile-First Responsive Design
   =================================================== */

:root {
  --font-family: 'Prompt', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  
  /* Primary & Neutral Colors */
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --primary-light: #eff6ff;
  --bg-main: #f8fafc;
  --bg-card: #ffffff;
  --border: #e2e8f0;
  --text-main: #0f172a;
  --text-muted: #64748b;
  --text-light: #94a3b8;

  /* Status Colors */
  --color-present: #10b981;
  --color-present-bg: #ecfdf5;
  --color-present-border: #a7f3d0;
  --color-present-text: #065f46;

  --color-absent: #ef4444;
  --color-absent-bg: #fef2f2;
  --color-absent-border: #fecaca;
  --color-absent-text: #991b1b;

  --color-leave: #f59e0b;
  --color-leave-bg: #fffbeb;
  --color-leave-border: #fde68a;
  --color-leave-text: #92400e;

  --color-late: #8b5cf6;
  --color-late-bg: #f5f3ff;
  --color-late-border: #ddd6fe;
  --color-late-text: #5b21b6;

  --color-activity: #0284c7;
  --color-activity-bg: #f0f9ff;
  --color-activity-border: #bae6fd;
  --color-activity-text: #0369a1;

  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-full: 9999px;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: var(--font-family);
  background-color: var(--bg-main);
  color: var(--text-main);
  line-height: 1.5;
  font-size: 15px;
  padding-bottom: 90px; /* Spacing for bottom bar */
}

/* ===================================================
   Header & Navbar
   =================================================== */
.navbar {
  background-color: var(--bg-card);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 50;
  box-shadow: var(--shadow-sm);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0.75rem 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.brand-icon {
  background: linear-gradient(135deg, var(--primary), #3b82f6);
  color: white;
  width: 42px;
  height: 42px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 10px rgba(37, 99, 235, 0.25);
}

.brand-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.2;
}

.brand-subtitle {
  font-size: 0.78rem;
  color: var(--text-muted);
  font-weight: 400;
}

.nav-tabs {
  display: flex;
  gap: 0.5rem;
  background-color: #f1f5f9;
  padding: 4px;
  border-radius: var(--radius-md);
}

.nav-tab {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s ease;
}

.nav-tab:hover {
  color: var(--text-main);
}

.nav-tab.active {
  background-color: var(--bg-card);
  color: var(--primary);
  font-weight: 600;
  box-shadow: var(--shadow-sm);
}

/* ===================================================
   Layout Containers
   =================================================== */
.main-container {
  max-width: 1200px;
  margin: 1.25rem auto;
  padding: 0 1rem;
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
  animation: fadeIn 0.2s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ===================================================
   Cards & Panels
   =================================================== */
.card {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  padding: 1.25rem;
  margin-bottom: 1.25rem;
}

.card-title {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.card-header-flex {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
  flex-wrap: wrap;
  gap: 0.5rem;
}

/* ===================================================
   Form Elements
   =================================================== */
.control-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  align-items: end;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.form-group label {
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.form-select, .form-input, .form-textarea {
  width: 100%;
  font-family: inherit;
  font-size: 0.95rem;
  padding: 0.65rem 0.85rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background-color: #fff;
  color: var(--text-main);
  transition: border-color 0.2s, box-shadow 0.2s;
  outline: none;
}

.form-select:focus, .form-input:focus, .form-textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

/* ===================================================
   Buttons
   =================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.65rem 1.1rem;
  font-family: inherit;
  font-size: 0.92rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.2s ease;
  user-select: none;
  white-space: nowrap;
}

.btn:active {
  transform: scale(0.98);
}

.btn-primary {
  background-color: var(--primary);
  color: white;
  box-shadow: 0 2px 6px rgba(37, 99, 235, 0.25);
}

.btn-primary:hover {
  background-color: var(--primary-hover);
}

.btn-secondary {
  background-color: #f1f5f9;
  color: var(--text-main);
  border-color: var(--border);
}

.btn-secondary:hover {
  background-color: #e2e8f0;
}

.btn-outline {
  background: white;
  color: var(--text-muted);
  border-color: var(--border);
}

.btn-outline:hover {
  background: #f8fafc;
  color: var(--text-main);
}

.btn-full {
  width: 100%;
}

.btn-lg {
  padding: 0.8rem 1.5rem;
  font-size: 1rem;
  font-weight: 600;
}

/* ===================================================
   Status Banner (Unsaved vs Saved)
   =================================================== */
.status-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.9rem 1.25rem;
  border-radius: var(--radius-md);
  margin-bottom: 1.25rem;
  transition: all 0.3s ease;
}

.status-banner-content {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.banner-icon {
  font-size: 1.5rem;
}

.status-banner strong {
  font-size: 0.95rem;
  display: block;
}

.status-banner p {
  font-size: 0.84rem;
  margin-top: 2px;
}

.banner-unsaved {
  background-color: #fffbeb;
  border: 1px solid #fde68a;
  color: #92400e;
}

.banner-saved {
  background-color: #ecfdf5;
  border: 1px solid #a7f3d0;
  color: #065f46;
}

/* ===================================================
   Live Summary Chips
   =================================================== */
.summary-bar-wrapper {
  margin-bottom: 1.25rem;
}

.summary-chips {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(110px, 1fr));
  gap: 0.6rem;
}

.chip {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 0.65rem 0.5rem;
  border-radius: var(--radius-sm);
  background: white;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  text-align: center;
}

.chip-label {
  font-size: 0.78rem;
  color: var(--text-muted);
  font-weight: 500;
  margin-bottom: 2px;
}

.chip-value {
  font-size: 1.35rem;
  font-weight: 700;
  line-height: 1.1;
}

.chip-total .chip-value { color: var(--text-main); }
.chip-present .chip-value { color: var(--color-present); }
.chip-absent .chip-value { color: var(--color-absent); }
.chip-leave .chip-value { color: var(--color-leave); }
.chip-late .chip-value { color: var(--color-late); }
.chip-activity .chip-value { color: var(--color-activity); }

/* Quick Filter in Class */
.list-search-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.search-input-box {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.45rem 0.75rem;
  color: var(--text-muted);
  flex: 1;
  max-width: 380px;
}

.search-input-box input {
  border: none;
  outline: none;
  font-family: inherit;
  font-size: 0.9rem;
  width: 100%;
  color: var(--text-main);
}

.student-count-badge {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ===================================================
   Student Attendance List Cards (Mobile First)
   =================================================== */
.student-list-container {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.student-card {
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1rem 1.15rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
}

.student-card:hover {
  box-shadow: var(--shadow-md);
}

/* Left edge status stripe */
.student-card.status-present { border-left: 4px solid var(--color-present); }
.student-card.status-absent { border-left: 4px solid var(--color-absent); background-color: #fffafa; }
.student-card.status-leave { border-left: 4px solid var(--color-leave); background-color: #fffdf5; }
.student-card.status-late { border-left: 4px solid var(--color-late); background-color: #faf8ff; }
.student-card.status-activity { border-left: 4px solid var(--color-activity); background-color: #f7fcff; }

.student-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}

.student-info {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.student-no-badge {
  background-color: #f1f5f9;
  color: var(--text-muted);
  font-size: 0.85rem;
  font-weight: 700;
  width: 34px;
  height: 34px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.student-card.status-present .student-no-badge { background-color: var(--color-present-bg); color: var(--color-present-text); }
.student-card.status-absent .student-no-badge { background-color: var(--color-absent-bg); color: var(--color-absent-text); }
.student-card.status-leave .student-no-badge { background-color: var(--color-leave-bg); color: var(--color-leave-text); }
.student-card.status-late .student-no-badge { background-color: var(--color-late-bg); color: var(--color-late-text); }
.student-card.status-activity .student-no-badge { background-color: var(--color-activity-bg); color: var(--color-activity-text); }

.student-name {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-main);
  line-height: 1.3;
}

.student-code {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 400;
}

.remark-preview-badge {
  font-size: 0.78rem;
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
  background: #f8fafc;
  border: 1px dashed var(--border);
  color: var(--text-muted);
  cursor: pointer;
  max-width: 160px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.remark-preview-badge:hover {
  background: #e2e8f0;
  color: var(--text-main);
}

/* 5 Status Toggle Buttons */
.status-buttons-group {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0.4rem;
}

.status-btn {
  padding: 0.55rem 0.25rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: #ffffff;
  color: var(--text-muted);
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  transition: all 0.15s ease;
}

.status-btn .status-icon {
  font-size: 0.95rem;
}

.status-btn:active {
  transform: scale(0.94);
}

/* Active status button states */
.status-btn.active.btn-present {
  background-color: var(--color-present);
  border-color: var(--color-present);
  color: white;
  font-weight: 600;
  box-shadow: 0 2px 6px rgba(16, 185, 129, 0.35);
}

.status-btn.active.btn-absent {
  background-color: var(--color-absent);
  border-color: var(--color-absent);
  color: white;
  font-weight: 600;
  box-shadow: 0 2px 6px rgba(239, 68, 68, 0.35);
}

.status-btn.active.btn-leave {
  background-color: var(--color-leave);
  border-color: var(--color-leave);
  color: white;
  font-weight: 600;
  box-shadow: 0 2px 6px rgba(245, 158, 11, 0.35);
}

.status-btn.active.btn-late {
  background-color: var(--color-late);
  border-color: var(--color-late);
  color: white;
  font-weight: 600;
  box-shadow: 0 2px 6px rgba(139, 92, 246, 0.35);
}

.status-btn.active.btn-activity {
  background-color: var(--color-activity);
  border-color: var(--color-activity);
  color: white;
  font-weight: 600;
  box-shadow: 0 2px 6px rgba(2, 132, 199, 0.35);
}

/* ===================================================
   Sticky Bottom Save Bar (Mobile)
   =================================================== */
.bottom-action-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: white;
  border-top: 1px solid var(--border);
  padding: 0.75rem 1.25rem;
  box-shadow: 0 -4px 12px rgba(0, 0, 0, 0.08);
  display: flex;
  align-items: center;
  justify-content: space-between;
  z-index: 40;
  max-width: 1200px;
  margin: 0 auto;
}

.bottom-bar-summary {
  font-size: 0.95rem;
  color: var(--text-muted);
}

.bottom-bar-summary strong {
  color: var(--color-present-text);
  font-size: 1.1rem;
}

/* ===================================================
   History Section Styles
   =================================================== */
.history-filter-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem;
  margin-bottom: 1rem;
}

.history-filter-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.spacer {
  flex: 1;
}

.stat-cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}

.stat-card {
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1rem;
  box-shadow: var(--shadow-sm);
  text-align: center;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 500;
  margin-bottom: 4px;
}

.stat-number {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.1;
}

.stat-desc {
  font-size: 0.74rem;
  color: var(--text-light);
  margin-top: 4px;
}

.stat-card-green .stat-number { color: var(--color-present); }
.stat-card-red .stat-number { color: var(--color-absent); }
.stat-card-amber .stat-number { color: var(--color-leave); }
.stat-card-purple .stat-number { color: var(--color-late); }

/* Daily Summaries Cards */
.daily-summaries-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 0.75rem;
}

.daily-summary-item {
  background: #f8fafc;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.85rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.daily-summary-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.daily-date-title {
  font-weight: 600;
  color: var(--text-main);
  font-size: 0.95rem;
}

.daily-class-badge {
  background: var(--primary-light);
  color: var(--primary);
  font-size: 0.78rem;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: var(--radius-full);
}

.daily-badges-row {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.daily-badge {
  font-size: 0.78rem;
  padding: 2px 6px;
  border-radius: 4px;
  font-weight: 500;
}

.daily-badge-present { background: var(--color-present-bg); color: var(--color-present-text); }
.daily-badge-absent { background: var(--color-absent-bg); color: var(--color-absent-text); }
.daily-badge-leave { background: var(--color-leave-bg); color: var(--color-leave-text); }
.daily-badge-late { background: var(--color-late-bg); color: var(--color-late-text); }
.daily-badge-activity { background: var(--color-activity-bg); color: var(--color-activity-text); }

.daily-edit-btn {
  border: none;
  background: white;
  color: var(--primary);
  border: 1px solid #bfdbfe;
  padding: 0.35rem 0.65rem;
  border-radius: 4px;
  font-size: 0.8rem;
  font-family: inherit;
  font-weight: 500;
  cursor: pointer;
  align-self: flex-start;
  transition: all 0.15s ease;
}

.daily-edit-btn:hover {
  background: var(--primary);
  color: white;
}

/* ===================================================
   Data Table (Desktop & History)
   =================================================== */
.table-responsive {
  width: 100%;
  overflow-x: auto;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  text-align: left;
}

.data-table th {
  background-color: #f8fafc;
  color: var(--text-muted);
  font-weight: 600;
  padding: 0.75rem 0.85rem;
  border-bottom: 2px solid var(--border);
  white-space: nowrap;
}

.data-table td {
  padding: 0.75rem 0.85rem;
  border-bottom: 1px solid var(--border);
  color: var(--text-main);
  white-space: nowrap;
}

.data-table tbody tr:hover {
  background-color: #f8fafc;
}

/* Status Pill Badges */
.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 8px;
  border-radius: var(--radius-full);
  font-size: 0.82rem;
  font-weight: 600;
}

.status-pill.present { background: var(--color-present-bg); color: var(--color-present-text); }
.status-pill.absent { background: var(--color-absent-bg); color: var(--color-absent-text); }
.status-pill.leave { background: var(--color-leave-bg); color: var(--color-leave-text); }
.status-pill.late { background: var(--color-late-bg); color: var(--color-late-text); }
.status-pill.activity { background: var(--color-activity-bg); color: var(--color-activity-text); }

.badge {
  background: #f1f5f9;
  color: var(--text-muted);
  padding: 3px 8px;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 500;
}

/* ===================================================
   Modal Popup
   =================================================== */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background-color: rgba(15, 23, 42, 0.5);
  backdrop-filter: blur(2px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  z-index: 100;
  transition: opacity 0.2s ease;
}

.modal-backdrop.hidden {
  display: none;
}

.modal-box {
  background: white;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 480px;
  overflow: hidden;
  animation: modalPop 0.2s ease-out;
}

@keyframes modalPop {
  from { opacity: 0; transform: scale(0.95); }
  to { opacity: 1; transform: scale(1); }
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border);
}

.modal-close-btn {
  background: none;
  border: none;
  font-size: 1.5rem;
  line-height: 1;
  color: var(--text-muted);
  cursor: pointer;
}

.modal-body {
  padding: 1.25rem;
}

.modal-student-desc {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 1rem;
}

.quick-remark-tags {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
  margin-top: 0.65rem;
}

.remark-tag {
  background: #f1f5f9;
  color: var(--text-muted);
  font-size: 0.78rem;
  padding: 3px 8px;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all 0.15s ease;
}

.remark-tag:hover {
  background: var(--primary-light);
  color: var(--primary);
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 0.5rem;
  padding: 0.85rem 1.25rem;
  background: #f8fafc;
  border-top: 1px solid var(--border);
}

/* ===================================================
   Toast Notifications
   =================================================== */
.toast-container {
  position: fixed;
  top: 1.25rem;
  right: 1.25rem;
  z-index: 150;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  pointer-events: none;
}

.toast {
  pointer-events: auto;
  min-width: 260px;
  max-width: 380px;
  padding: 0.85rem 1.15rem;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  font-size: 0.9rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  animation: toastIn 0.25s ease-out;
  color: white;
}

@keyframes toastIn {
  from { opacity: 0; transform: translateY(-10px); }
  to { opacity: 1; transform: translateY(0); }
}

.toast-success { background-color: #059669; }
.toast-error { background-color: #dc2626; }
.toast-info { background-color: #2563eb; }

/* ===================================================
   Print Styles
   =================================================== */
@media print {
  body {
    background: white;
    color: black;
    padding-bottom: 0;
  }
  .navbar, .history-filter-card, .history-filter-actions, .bottom-action-bar, .toast-container {
    display: none !important;
  }
  .card {
    border: none !important;
    box-shadow: none !important;
    padding: 0 !important;
  }
  .data-table th, .data-table td {
    border: 1px solid #cbd5e1 !important;
    padding: 6px 8px !important;
    font-size: 0.85rem !important;
  }
}

/* Responsive adjustments for larger screens */
@media (min-width: 768px) {
  .student-card {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
  
  .student-card-header {
    flex: 1;
  }

  .status-buttons-group {
    width: 360px;
    flex-shrink: 0;
  }

  .bottom-action-bar {
    display: none; /* Mobile only, desktop uses top bar */
  }

  body {
    padding-bottom: 2rem;
  }
}