/* =============================================
   CEBAS Asistencia - Styles
   Mobile-first, responsive design
   Primary: RGB(14, 47, 68) = #0E2F44
   NO ORANGE
   ============================================= */

:root {
  /* Primary Colors */
  --color-primary: rgba(14, 47, 68, 0.97);
  --color-primary-light: #1A4A6B;
  --color-primary-dark: #091D2C;
  --color-primary-rgb: 14, 47, 68;

  /* Accent Colors */
  --color-accent: #2E9CCA;
  --color-accent-light: #3DB4E6;
  --color-accent-dark: #2380A8;

  /* Semantic Colors */
  --color-success: #27AE60;
  --color-success-light: #E8F8EF;
  --color-danger: #E74C3C;
  --color-danger-light: #FDECEB;
  --color-warning: #F1C40F;
  --color-warning-light: #FEF9E7;
  --color-info: #2E9CCA;
  --color-info-light: #EBF5FB;

  /* Neutral Colors */
  --color-bg: #F0F4F8;
  --color-bg-card: #FFFFFF;
  --color-bg-hover: #E8EDF2;
  --color-border: #D1D9E0;
  --color-border-light: #E8EDF2;
  --color-text: #2C3E50;
  --color-text-secondary: #6B7C8D;
  --color-text-light: #95A5B5;
  --color-text-inverse: #FFFFFF;

  /* Sidebar */
  --sidebar-width: 260px;
  --sidebar-collapsed-width: 0px;
  --topbar-height: 56px;

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.07);
  --shadow-lg: 0 10px 25px rgba(0,0,0,0.1);
  --shadow-xl: 0 20px 40px rgba(0,0,0,0.15);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
  --transition-slow: 350ms ease;

  /* Font */
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
}

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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: var(--font-family);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.5;
  overflow-x: hidden;
  min-height: 100vh;
}

a {
  color: var(--color-accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* ====== Sidebar ====== */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--sidebar-width);
  height: 100vh;
  background: var(--color-primary);
  color: var(--color-text-inverse);
  z-index: 1000;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-normal);
  overflow-y: auto;
  overflow-x: hidden;
}

.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 999;
  transition: opacity var(--transition-normal);
}

.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
  min-height: 56px;
}

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.sidebar-logo-img {
  width: 32px;
  height: 32px;
  object-fit: contain;
  border-radius: var(--radius-sm);
}

.sidebar-title {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 1px;
}

.sidebar-close-btn {
  display: none;
  background: none;
  border: none;
  color: var(--color-text-inverse);
  cursor: pointer;
  padding: 4px;
  border-radius: var(--radius-sm);
}

.sidebar-close-btn:hover {
  background: rgba(255,255,255,0.1);
}

.sidebar-nav {
  flex: 1;
  padding: 12px 8px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  border-radius: var(--radius-md);
  color: rgba(255,255,255,0.7);
  transition: all var(--transition-fast);
  font-size: 0.9375rem;
  font-weight: 500;
  text-decoration: none;
}

.nav-item:hover {
  background: rgba(255,255,255,0.1);
  color: var(--color-text-inverse);
  text-decoration: none;
}

.nav-item.active {
  background: rgba(255,255,255,0.15);
  color: var(--color-text-inverse);
  font-weight: 600;
}

.nav-item svg {
  flex-shrink: 0;
}

.nav-separator {
  height: 1px;
  background: rgba(255,255,255,0.1);
  margin: 8px 16px;
}

.sidebar-footer {
  padding: 12px 20px;
  border-top: 1px solid rgba(255,255,255,0.1);
  color: rgba(255,255,255,0.4);
  text-align: center;
}

/* ====== Main Content ====== */
.main-content {
  margin-left: var(--sidebar-width);
  min-height: 100vh;
  transition: margin-left var(--transition-normal);
}

/* ====== Topbar ====== */
.topbar {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  gap: 12px;
  height: var(--topbar-height);
  padding: 0 20px;
  background: var(--color-bg-card);
  border-bottom: 1px solid var(--color-border-light);
  box-shadow: var(--shadow-sm);
}

.topbar-menu-btn {
  display: none;
  background: none;
  border: none;
  color: var(--color-text);
  cursor: pointer;
  padding: 6px;
  border-radius: var(--radius-sm);
}

.topbar-menu-btn:hover {
  background: var(--color-bg-hover);
}

.topbar-title {
  font-size: 1.125rem;
  font-weight: 600;
  flex: 1;
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.status-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
}

.status-dot.online {
  background: var(--color-success);
  box-shadow: 0 0 0 3px var(--color-success-light);
}

.status-dot.offline {
  background: var(--color-danger);
  box-shadow: 0 0 0 3px var(--color-danger-light);
}

/* ====== Views Container ====== */
.views-container {
  padding: 20px;
  max-width: 1400px;
}

.view {
  display: none;
  animation: fadeIn var(--transition-fast) ease;
}

.view.active {
  display: block;
}

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

/* ====== Setup View ====== */
.setup-container {
  display: flex;
  justify-content: center;
  padding: 20px 0;
}

.setup-card {
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  padding: 32px;
  max-width: 720px;
  width: 100%;
  box-shadow: var(--shadow-md);
}

.setup-icon {
  text-align: center;
  margin-bottom: 16px;
}

.setup-icon img {
  display: inline-block;
}

.setup-card h2 {
  text-align: center;
  margin-bottom: 8px;
  color: var(--color-primary);
}

.setup-desc {
  text-align: center;
  color: var(--color-text-secondary);
  margin-bottom: 24px;
  line-height: 1.6;
}

.setup-steps {
  background: var(--color-info-light);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  margin-bottom: 24px;
}

.setup-steps h3 {
  font-size: 0.9375rem;
  margin-bottom: 8px;
  color: var(--color-primary);
}

.setup-steps ol {
  padding-left: 20px;
}

.setup-steps li {
  font-size: 0.875rem;
  margin-bottom: 4px;
  color: var(--color-text);
}

.setup-sql {
  background: var(--color-primary-dark);
  border-radius: var(--radius-md);
  padding: 16px;
  margin-bottom: 24px;
  position: relative;
}

.setup-sql h3 {
  color: rgba(255,255,255,0.9);
  font-size: 0.875rem;
  margin-bottom: 8px;
}

.setup-sql pre {
  color: #A8D8EA;
  font-size: 0.75rem;
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-all;
  max-height: 300px;
  overflow-y: auto;
  line-height: 1.6;
}

.setup-sql .btn {
  position: absolute;
  top: 12px;
  right: 12px;
  border-color: rgba(255,255,255,0.3);
  color: rgba(255,255,255,0.8);
}

.setup-sql .btn:hover {
  background: rgba(255,255,255,0.1);
}

.setup-form {
  margin-top: 24px;
}

/* ====== Forms ====== */
.form-group {
  margin-bottom: 16px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.form-group label {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.input-field,
.select-input {
  width: 100%;
  padding: 10px 14px;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-family: var(--font-family);
  color: var(--color-text);
  background: var(--color-bg-card);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  appearance: none;
  -webkit-appearance: none;
}

.input-field:focus,
.select-input:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(46,156,202,0.15);
}

.select-input {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%236B7C8D' stroke-width='1.5' fill='none'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 36px;
}

.form-group small {
  font-size: 0.75rem;
  color: var(--color-text-light);
}

.form-actions {
  display: flex;
  gap: 8px;
  justify-content: flex-end;
  margin-top: 8px;
}

.form-row {
  display: flex;
  gap: 12px;
}

/* ====== Buttons ====== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px 16px;
  border: 1.5px solid transparent;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 600;
  font-family: var(--font-family);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  white-space: nowrap;
  user-select: none;
  -webkit-user-select: none;
}

.btn:active {
  transform: scale(0.97);
}

.btn-primary {
  background: var(--color-accent);
  color: var(--color-text-inverse);
  border-color: var(--color-accent);
}

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

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

.btn-outline:hover {
  background: var(--color-bg-hover);
  border-color: var(--color-text-secondary);
}

.btn-success {
  background: var(--color-success);
  color: var(--color-text-inverse);
  border-color: var(--color-success);
}

.btn-success:hover {
  background: #219A52;
}

.btn-danger {
  background: var(--color-danger);
  color: var(--color-text-inverse);
  border-color: var(--color-danger);
}

.btn-danger:hover {
  background: #C0392B;
}

.btn-warning {
  background: var(--color-warning);
  color: var(--color-text);
  border-color: var(--color-warning);
}

.btn-sm {
  padding: 6px 12px;
  font-size: 0.8125rem;
}

.btn-lg {
  padding: 12px 24px;
  font-size: 1rem;
}

.btn-block {
  width: 100%;
}

.btn-icon {
  padding: 8px;
  min-width: 36px;
  height: 36px;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

/* ====== Cards ====== */
.card {
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  padding: 16px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border-light);
  transition: box-shadow var(--transition-fast);
}

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

/* ====== Home View ====== */
.home-welcome {
  text-align: center;
  padding: 24px 0;
}

.home-welcome h2 {
  color: var(--color-primary);
  margin-bottom: 4px;
}

.home-welcome p {
  color: var(--color-text-secondary);
}

.home-quick-actions {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin: 20px 0;
}

.home-action-card {
  display: flex;
  align-items: center;
  gap: 16px;
  background: var(--color-bg-card);
  padding: 16px 20px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border-light);
  transition: all var(--transition-fast);
  text-decoration: none;
  color: var(--color-text);
}

.home-action-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
  text-decoration: none;
}

.home-action-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.home-action-icon.accent {
  background: var(--color-info-light);
  color: var(--color-accent);
}

.home-action-icon.success {
  background: var(--color-success-light);
  color: var(--color-success);
}

.home-action-icon.warning {
  background: var(--color-warning-light);
  color: #B7950B;
}

.home-action-card h3 {
  font-size: 1rem;
  margin-bottom: 2px;
}

.home-action-card p {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
}

.home-stats {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-top: 20px;
}

.stat-card {
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  padding: 16px 20px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border-light);
}

.stat-card .stat-label {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  font-weight: 500;
}

.stat-card .stat-value {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-primary);
}

/* ====== View Toolbar ====== */
.view-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  margin-bottom: 16px;
}

.toolbar-left {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  flex: 1;
  min-width: 0;
}

.toolbar-right {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-shrink: 0;
}

/* ====== Students List ====== */
.students-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.student-card {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--color-bg-card);
  padding: 12px 16px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border-light);
  transition: all var(--transition-fast);
}

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

.student-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--color-primary);
  color: var(--color-text-inverse);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.875rem;
  flex-shrink: 0;
}

.student-info {
  flex: 1;
  min-width: 0;
}

.student-name {
  font-weight: 600;
  font-size: 0.9375rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.student-details {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.student-actions {
  display: flex;
  gap: 4px;
  flex-shrink: 0;
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
}

.badge-active {
  background: var(--color-success-light);
  color: var(--color-success);
}

.badge-inactive {
  background: var(--color-danger-light);
  color: var(--color-danger);
}

.badge-offline {
  background: var(--color-danger-light);
  color: var(--color-danger);
}

.badge-online {
  background: var(--color-success-light);
  color: var(--color-success);
}

/* ====== Attendance View ====== */
.attendance-form-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.attendance-form-row .form-group {
  flex: 1;
  min-width: 160px;
}

.att-schedule-info {
  background: var(--color-info-light);
  border-radius: var(--radius-md);
  padding: 12px 16px;
  margin-bottom: 16px;
  font-size: 0.875rem;
}

.att-schedule-info h4 {
  color: var(--color-primary);
  margin-bottom: 4px;
  font-size: 0.875rem;
}

.att-schedule-info .schedule-subjects {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 8px;
}

.schedule-chip {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  background: var(--color-accent);
  color: var(--color-text-inverse);
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 500;
}

.schedule-chip.recess {
  background: var(--color-text-light);
}

.schedule-chip.free {
  background: var(--color-border);
  color: var(--color-text-secondary);
}

.att-warnings {
  background: var(--color-warning-light);
  border-radius: var(--radius-md);
  padding: 12px 16px;
  margin-bottom: 16px;
  font-size: 0.875rem;
}

.att-warnings p {
  margin-bottom: 4px;
  color: #7D6608;
}

.attendance-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}

.attendance-toolbar-actions {
  display: flex;
  gap: 6px;
}

.attendance-summary {
  display: flex;
  gap: 16px;
  margin-bottom: 12px;
}

.att-count {
  font-size: 0.875rem;
  font-weight: 600;
}

.att-count.present {
  color: var(--color-success);
}

.att-count.absent {
  color: var(--color-danger);
}

.attendance-student-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 80px;
}

.att-student-card {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--color-bg-card);
  padding: 14px 16px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border-light);
  transition: all var(--transition-fast);
}

.att-student-card.absent {
  border-color: var(--color-danger);
  background: var(--color-danger-light);
}

.att-student-details {
  flex: 1;
  min-width: 0;
}

.att-student-name {
  font-weight: 600;
  font-size: 0.9375rem;
}

.att-time-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 6px;
  flex-wrap: wrap;
}

.att-time-group {
  display: flex;
  align-items: center;
  gap: 4px;
}

.att-time-group label {
  font-size: 0.6875rem;
  font-weight: 600;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.att-time-input {
  width: 90px;
  padding: 4px 8px;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.8125rem;
  font-family: var(--font-family);
  color: var(--color-text);
  background: var(--color-bg-card);
  transition: border-color var(--transition-fast);
}

.att-time-input:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 2px rgba(46,156,202,0.15);
}

.att-time-input:disabled {
  background: var(--color-bg);
  color: var(--color-text-light);
  opacity: 0.6;
  cursor: not-allowed;
}

.att-hours-summary {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-text-secondary);
  white-space: nowrap;
  padding: 2px 8px;
  background: var(--color-bg);
  border-radius: var(--radius-full);
}

.att-hours-summary.partial {
  color: #5E35B1;
  background: #EDE7F6;
}

/* Toggle Switch for Attendance */
.toggle-attendance {
  position: relative;
  width: 64px;
  height: 34px;
  flex-shrink: 0;
}

.toggle-attendance input {
  opacity: 0;
  width: 0;
  height: 0;
}

.toggle-slider {
  position: absolute;
  cursor: pointer;
  inset: 0;
  background: var(--color-danger);
  border-radius: 34px;
  transition: var(--transition-fast);
}

.toggle-slider::before {
  content: '';
  position: absolute;
  height: 28px;
  width: 28px;
  left: 3px;
  bottom: 3px;
  background: white;
  border-radius: 50%;
  transition: var(--transition-fast);
  box-shadow: var(--shadow-sm);
}

.toggle-attendance input:checked + .toggle-slider {
  background: var(--color-success);
}

.toggle-attendance input:checked + .toggle-slider::before {
  transform: translateX(30px);
}

.toggle-label {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  font-size: 0.625rem;
  font-weight: 700;
  color: white;
  pointer-events: none;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.toggle-label.label-absent {
  left: 8px;
}

.toggle-label.label-present {
  right: 8px;
}

.toggle-attendance input:checked ~ .label-absent {
  display: none;
}

.toggle-attendance input:not(:checked) ~ .label-present {
  display: none;
}

.attendance-save-bar {
  position: fixed;
  bottom: 0;
  left: var(--sidebar-width);
  right: 0;
  padding: 12px 20px;
  background: var(--color-bg-card);
  border-top: 1px solid var(--color-border-light);
  box-shadow: 0 -2px 10px rgba(0,0,0,0.05);
  z-index: 50;
}

/* ====== Schedule View ====== */
.schedule-grid {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.schedule-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.8125rem;
  min-width: 600px;
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.schedule-table th,
.schedule-table td {
  padding: 10px 12px;
  text-align: center;
  border: 1px solid var(--color-border-light);
}

.schedule-table th {
  background: var(--color-primary);
  color: var(--color-text-inverse);
  font-weight: 600;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  position: sticky;
  top: 0;
}

.schedule-table td {
  vertical-align: middle;
}

.schedule-table td.recess {
  background: var(--color-bg-hover);
  color: var(--color-text-light);
  font-style: italic;
}

.schedule-table td.free {
  background: var(--color-bg);
  color: var(--color-text-light);
}

.schedule-table td .subject-name {
  font-weight: 500;
  color: var(--color-text);
}

.schedule-cell-actions {
  display: flex;
  gap: 4px;
  justify-content: center;
  margin-top: 4px;
}

.schedule-cell-actions button {
  background: none;
  border: none;
  cursor: pointer;
  padding: 2px;
  color: var(--color-text-light);
  border-radius: var(--radius-sm);
}

.schedule-cell-actions button:hover {
  color: var(--color-danger);
  background: var(--color-danger-light);
}

.schedule-table td.time-col {
  font-weight: 600;
  font-size: 0.75rem;
  color: var(--color-text-secondary);
  white-space: nowrap;
  background: var(--color-bg);
}

/* ====== Reports View ====== */
.reports-container {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.reports-filters {
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border-light);
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.report-results {
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border-light);
}

.report-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
  flex-wrap: wrap;
  gap: 8px;
}

.report-chart-container {
  margin-bottom: 20px;
  position: relative;
  height: 300px;
}

.report-table-container {
  overflow-x: auto;
}

.report-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}

.report-table th,
.report-table td {
  padding: 10px 14px;
  text-align: left;
  border-bottom: 1px solid var(--color-border-light);
}

.report-table th {
  background: var(--color-primary);
  color: var(--color-text-inverse);
  font-weight: 600;
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.3px;
  position: sticky;
  top: 0;
}

.report-table tr:hover {
  background: var(--color-bg-hover);
}

.report-table .absence-count {
  text-align: center;
  font-weight: 600;
}

.report-table .absence-high {
  color: var(--color-danger);
}

/* ====== Settings View ====== */
.settings-container {
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border-light);
  overflow: hidden;
}

.settings-tabs {
  display: flex;
  overflow-x: auto;
  border-bottom: 1px solid var(--color-border-light);
  -webkit-overflow-scrolling: touch;
}

.settings-tab {
  padding: 14px 18px;
  border: none;
  background: none;
  font-family: var(--font-family);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text-secondary);
  cursor: pointer;
  white-space: nowrap;
  border-bottom: 2px solid transparent;
  transition: all var(--transition-fast);
}

.settings-tab:hover {
  color: var(--color-text);
  background: var(--color-bg-hover);
}

.settings-tab.active {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

.settings-panel {
  display: none;
  padding: 20px;
}

.settings-panel.active {
  display: block;
}

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

.settings-panel-header h3 {
  font-size: 1.0625rem;
  color: var(--color-primary);
}

.settings-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.settings-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  background: var(--color-bg);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-light);
}

.settings-item-info {
  flex: 1;
  min-width: 0;
}

.settings-item-name {
  font-weight: 600;
  font-size: 0.9375rem;
}

.settings-item-detail {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
}

.settings-item-actions {
  display: flex;
  gap: 4px;
}

.settings-db-info {
  max-width: 500px;
}

/* ====== Modal ====== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  animation: fadeIn var(--transition-fast) ease;
}

.modal-content {
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  padding: 24px;
  width: 100%;
  max-width: 480px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-xl);
  animation: slideUp var(--transition-fast) ease;
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.modal-header h3 {
  color: var(--color-primary);
}

.modal-close {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-text-secondary);
  padding: 4px;
  border-radius: var(--radius-sm);
}

.modal-close:hover {
  background: var(--color-bg-hover);
  color: var(--color-text);
}

/* ====== Toast ====== */
.toast-container {
  position: fixed;
  bottom: 20px;
  right: 20px;
  z-index: 3000;
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none;
}

.toast {
  background: var(--color-primary);
  color: var(--color-text-inverse);
  padding: 12px 20px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  font-size: 0.875rem;
  max-width: 360px;
  pointer-events: auto;
  animation: toastIn var(--transition-normal) ease;
  display: flex;
  align-items: center;
  gap: 8px;
}

.toast.success {
  background: var(--color-success);
}

.toast.error {
  background: var(--color-danger);
}

.toast.warning {
  background: var(--color-warning);
  color: var(--color-text);
}

.toast.info {
  background: var(--color-accent);
}

.toast.removing {
  animation: toastOut var(--transition-fast) ease forwards;
}

@keyframes toastIn {
  from { opacity: 0; transform: translateX(40px); }
  to { opacity: 1; transform: translateX(0); }
}

@keyframes toastOut {
  from { opacity: 1; transform: translateX(0); }
  to { opacity: 0; transform: translateX(40px); }
}

/* ====== Empty State ====== */
.empty-state {
  text-align: center;
  padding: 40px 20px;
  color: var(--color-text-secondary);
}

.empty-state svg {
  margin-bottom: 12px;
  color: var(--color-text-light);
}

.empty-state h3 {
  margin-bottom: 4px;
  color: var(--color-text);
}

.empty-state p {
  font-size: 0.875rem;
}

/* ====== Import XLSX Preview ====== */
.import-preview {
  max-height: 300px;
  overflow-y: auto;
  margin: 16px 0;
}

.import-preview table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.8125rem;
}

.import-preview th,
.import-preview td {
  padding: 6px 10px;
  border: 1px solid var(--color-border-light);
  text-align: left;
}

.import-preview th {
  background: var(--color-primary);
  color: var(--color-text-inverse);
  font-size: 0.75rem;
  text-transform: uppercase;
}

.import-preview tr.error-row {
  background: var(--color-danger-light);
}

.import-stats {
  display: flex;
  gap: 16px;
  margin: 12px 0;
  font-size: 0.875rem;
}

.import-stats .stat-valid {
  color: var(--color-success);
  font-weight: 600;
}

.import-stats .stat-error {
  color: var(--color-danger);
  font-weight: 600;
}

/* ====== Loading Spinner ====== */
.spinner {
  width: 20px;
  height: 20px;
  border: 2.5px solid var(--color-border);
  border-top-color: var(--color-accent);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

.spinner-lg {
  width: 40px;
  height: 40px;
  border-width: 3px;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.loading-container {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px;
  flex-direction: column;
  gap: 12px;
  color: var(--color-text-secondary);
}

/* ====== Monthly Grid Report ====== */
.monthly-grid-wrapper {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin-top: 8px;
}

.monthly-grid {
  border-collapse: collapse;
  font-size: 0.75rem;
  min-width: 800px;
  background: var(--color-bg-card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  width: max-content;
}

.monthly-grid th,
.monthly-grid td {
  padding: 6px 8px;
  text-align: center;
  border: 1px solid var(--color-border-light);
  white-space: nowrap;
}

.monthly-grid thead th {
  background: var(--color-primary);
  color: var(--color-text-inverse);
  font-weight: 600;
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.3px;
}

.monthly-grid .month-header {
  background: var(--color-primary-dark);
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
}

.monthly-grid .day-name-row th {
  font-size: 0.625rem;
  padding: 4px 6px;
}

.monthly-grid .day-num-row th {
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 6px;
}

.monthly-grid .student-name-col {
  text-align: left;
  font-weight: 600;
  min-width: 160px;
  position: sticky;
  left: 36px;
  z-index: 2;
  background: var(--color-bg-card);
}

.monthly-grid thead .student-name-col {
  background: var(--color-primary);
  color: var(--color-text-inverse);
}

.monthly-grid .order-col {
  min-width: 36px;
  width: 36px;
  font-weight: 600;
  color: var(--color-text-secondary);
  position: sticky;
  left: 0;
  z-index: 2;
  background: var(--color-bg-card);
}

.monthly-grid thead .order-col {
  background: var(--color-primary);
  color: var(--color-text-inverse);
}

.monthly-grid tbody tr:nth-child(even) {
  background: rgba(0,0,0,0.02);
}

.monthly-grid tbody tr:hover {
  background: rgba(0,0,0,0.04);
}

.monthly-grid .cell-present {
  color: var(--color-success);
  font-weight: 700;
}

.monthly-grid .cell-absent {
  color: var(--color-danger);
  font-weight: 700;
}

.monthly-grid .cell-late {
  color: #5E35B1;
  font-weight: 700;
  background: #EDE7F6;
}

.monthly-grid .cell-early {
  color: #5E35B1;
  font-weight: 700;
  background: #E8EAF6;
}

.monthly-grid .cell-late-early {
  color: #4527A0;
  font-weight: 700;
  background: #D1C4E9;
}

.monthly-grid .cell-baja {
  color: var(--color-text-light);
  font-style: italic;
  font-size: 0.625rem;
  font-weight: 600;
}

.monthly-grid .cell-holiday {
  background: var(--color-bg-hover);
  color: var(--color-text-light);
  font-size: 0.5625rem;
  font-weight: 600;
}

.monthly-grid .holiday-header {
  background: var(--color-primary-light) !important;
}

.monthly-grid .day-col {
  min-width: 32px;
  width: 32px;
}
.monthly-grid .cell-absent-justified {
  color: #B7950B;
  font-weight: 700;
  background: #FEF9E7;
  cursor: help;
}

/* ====== Justificaciones View ====== */
.justificaciones-container {
  max-width: 800px;
}

.justificaciones-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
  flex-wrap: wrap;
  gap: 8px;
}

.justificaciones-header h3 {
  font-size: 1rem;
  color: var(--color-primary);
}

.justifications-count {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-danger);
  background: var(--color-danger-light);
  padding: 4px 12px;
  border-radius: var(--radius-full);
}

.justificaciones-cards {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 80px;
}

.just-card {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--color-bg-card);
  padding: 14px 16px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border-light);
  transition: all var(--transition-fast);
  flex-wrap: wrap;
}

.just-card.justified {
  border-color: #B7950B;
  background: #FEF9E7;
}

.just-card-left {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
  flex-shrink: 0;
}

.just-card-info {
  min-width: 0;
}

.just-card-name {
  font-weight: 600;
  font-size: 0.9375rem;
  display: block;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.just-card-dni {
  font-size: 0.75rem;
  color: var(--color-text-secondary);
}

.just-card-right {
  flex: 1;
  min-width: 200px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.just-input {
  width: 100%;
  padding: 8px 12px;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-family: var(--font-family);
  color: var(--color-text);
  background: var(--color-bg-card);
  transition: border-color var(--transition-fast);
}

.just-input:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(46,156,202,0.15);
}

.just-input::placeholder {
  color: var(--color-text-light);
}

.just-badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  font-size: 0.6875rem;
  font-weight: 700;
  background: #FEF9E7;
  color: #B7950B;
  white-space: nowrap;
  flex-shrink: 0;
  border: 1px solid #F1C40F;
}

.justifications-save-bar {
  position: fixed;
  bottom: 0;
  left: var(--sidebar-width);
  right: 0;
  padding: 12px 20px;
  background: var(--color-bg-card);
  border-top: 1px solid var(--color-border-light);
  box-shadow: 0 -2px 10px rgba(0,0,0,0.05);
  z-index: 50;
  max-width: 800px;
}


/* ====== Responsive: Tablet (768px+) ====== */
@media (min-width: 768px) {
  .home-quick-actions {
    grid-template-columns: repeat(3, 1fr);
  }

  .home-stats {
    grid-template-columns: repeat(3, 1fr);
  }

  .reports-filters {
    grid-template-columns: repeat(2, 1fr);
  }

  .form-row {
    flex-direction: row;
  }

  .attendance-form-row {
    flex-direction: row;
  }
}

/* ====== Responsive: Desktop (1024px+) ====== */
@media (min-width: 1024px) {
  .reports-filters {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ====== Responsive: Mobile (< 768px) ====== */
@media (max-width: 767px) {
  .sidebar {
    transform: translateX(-100%);
  }

  .sidebar.open {
    transform: translateX(0);
  }

  .sidebar-overlay.active {
    display: block;
  }

  .sidebar-close-btn {
    display: block;
  }

  .main-content {
    margin-left: 0;
  }

  .topbar-menu-btn {
    display: block;
  }

  .attendance-save-bar {
    left: 0;
  }

  .justifications-save-bar {
    left: 0;
  }

  .views-container {
    padding: 12px;
  }

  .setup-card {
    padding: 20px;
  }

  .home-quick-actions {
    grid-template-columns: 1fr;
  }

  .home-stats {
    grid-template-columns: 1fr;
  }

  .view-toolbar {
    flex-direction: column;
    align-items: stretch;
  }

  .toolbar-left {
    flex-direction: column;
  }

  .toolbar-right {
    justify-content: flex-end;
  }

  .attendance-toolbar {
    flex-direction: column;
    align-items: stretch;
  }

  .attendance-toolbar-actions {
    justify-content: center;
  }

  .toast-container {
    bottom: 12px;
    right: 12px;
    left: 12px;
  }

  .toast {
    max-width: 100%;
  }

  .modal-content {
    padding: 20px;
    max-height: 95vh;
  }

  .settings-tabs {
    padding: 0;
  }

  .settings-tab {
    padding: 12px 14px;
    font-size: 0.8125rem;
  }

  .reports-filters {
    padding: 16px;
  }

  .student-card {
    flex-wrap: wrap;
  }

  .student-actions {
    width: 100%;
    justify-content: flex-end;
  }
}

/* ====== Utility ====== */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-sm { font-size: 0.875rem; }
.text-xs { font-size: 0.75rem; }
.font-bold { font-weight: 700; }
.mt-1 { margin-top: 4px; }
.mt-2 { margin-top: 8px; }
.mt-3 { margin-top: 12px; }
.mt-4 { margin-top: 16px; }
.mb-1 { margin-bottom: 4px; }
.mb-2 { margin-bottom: 8px; }
.mb-3 { margin-bottom: 12px; }
.mb-4 { margin-bottom: 16px; }
.gap-2 { gap: 8px; }
.hidden { display: none !important; }