:root {
  --primary: #1c7ed6;
  --primary-dark: #1864ab;
  --background: #f5f7fb;
  --text: #1f2933;
  --muted: #6b7280;
  --card-bg: #ffffff;
  --success: #2f9e44;
  --danger: #d64545;
  --warning: #f59f00;
  font-size: 16px;
}

body {
  font-family: 'Poppins', 'Segoe UI', sans-serif;
  background-color: var(--background);
  color: var(--text);
  margin: 0;
}

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

a:hover {
  text-decoration: underline;
}

.navbar {
  background-color: var(--card-bg);
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
  padding: 1rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 100;
}

.navbar-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.navbar-hello {
  color: var(--muted);
  font-weight: 500;
}

.navbar h1 {
  font-size: 1.5rem;
  margin: 0;
  color: var(--primary);
}

.container {
  max-width: 1100px;
  margin: 2rem auto;
  padding: 0 1rem;
}

.card {
  background-color: var(--card-bg);
  border-radius: 16px;
  box-shadow: 0 10px 25px rgba(15, 23, 42, 0.05);
  padding: 2rem;
  margin-bottom: 2rem;
}

.auth-card {
  max-width: 480px;
  margin: 0 auto;
}

.auth-card form {
  margin-top: 1.5rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  border-radius: 999px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: white;
  box-shadow: 0 8px 20px rgba(28, 126, 214, 0.35);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 12px 25px rgba(28, 126, 214, 0.45);
}

.btn-secondary {
  background-color: var(--muted);
  color: white;
}

.btn-danger {
  background-color: var(--danger);
  color: white;
}

.btn-small {
  padding: 0.35rem 0.75rem;
  font-size: 0.85rem;
}

form label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.35rem;
}

form input,
form textarea,
form select {
  width: 100%;
  padding: 0.65rem 0.85rem;
  border: 1px solid rgba(148, 163, 184, 0.4);
  border-radius: 12px;
  margin-bottom: 1rem;
  font-size: 1rem;
  font-family: inherit;
  background-color: #fdfdff;
}

.form-help {
  margin-top: -0.5rem;
  margin-bottom: 1.25rem;
  font-size: 0.9rem;
  color: var(--muted);
}

.alert {
  border-radius: 12px;
  padding: 1rem 1.25rem;
  margin-bottom: 1rem;
  font-weight: 500;
}

.alert-success {
  background-color: rgba(47, 158, 68, 0.1);
  color: var(--success);
}

.alert-danger {
  background-color: rgba(214, 69, 69, 0.1);
  color: var(--danger);
}

.alert-warning {
  background-color: rgba(245, 159, 0, 0.1);
  color: var(--warning);
}

.alert-info {
  background-color: rgba(28, 126, 214, 0.1);
  color: var(--primary);
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
}

.grid-two {
  display: grid;
  gap: 2rem;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  width: 95%;
  align-items: end;
}

.grid-two > * {
  min-width: 0;
}

.stats-card {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.stats-card h3 {
  margin: 0;
  font-size: 1.25rem;
}

.badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 600;
  background-color: rgba(28, 126, 214, 0.12);
  color: var(--primary-dark);
}

.badge-locked {
  background-color: rgba(214, 69, 69, 0.12);
  color: var(--danger);
}

.badge-unlocked {
  background-color: rgba(47, 158, 68, 0.12);
  color: var(--success);
}

.table {
  width: 100%;
  border-collapse: collapse;
}

.table th,
.table td {
  padding: 0.75rem;
  text-align: left;
  border-bottom: 1px solid rgba(148, 163, 184, 0.25);
}

.question {
  margin-bottom: 1.5rem;
}

.question h4 {
  margin-bottom: 0.5rem;
}

.timer {
  font-weight: 600;
  color: var(--danger);
}

footer {
  text-align: center;
  padding: 2rem 0 3rem;
  color: var(--muted);
}

.muted {
  color: var(--muted);
}

.student-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
}

.student-card {
  display: flex;
  gap: 1rem;
  align-items: center;
  background: rgba(255, 255, 255, 0.85);
  border-radius: 16px;
  padding: 1rem;
  box-shadow: 0 10px 25px rgba(15, 23, 42, 0.08);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
  color: inherit;
}

.student-card:hover {
  transform: translateY(-3px);
  text-decoration: none;
  box-shadow: 0 14px 30px rgba(15, 23, 42, 0.12);
}

.student-card-body h3 {
  margin: 0;
}

.student-avatar,
.student-avatar-large {
  width: 70px;
  height: 70px;
  border-radius: 50%;
  overflow: hidden;
  background-color: rgba(148, 163, 184, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
}

.student-avatar img,
.student-avatar-large img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.student-avatar-large {
  width: 120px;
  height: 120px;
  box-shadow: inset 0 0 0 4px rgba(28, 126, 214, 0.15);
}

.avatar-settings {
  display: flex;
  gap: 1.5rem;
  align-items: center;
  flex-wrap: wrap;
  margin-bottom: 1.25rem;
}

.avatar-settings-fields {
  display: grid;
  gap: 0.75rem;
  min-width: 200px;
}

.checkbox-inline {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  font-weight: 600;
}

.student-profile-header {
  display: flex;
  gap: 2rem;
  align-items: center;
  flex-wrap: wrap;
}

.card-header-actions {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.card-actions {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.responsive-grid {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.inline-form {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  margin: 1rem 0;
}

.inline-form.inline-form-compact {
  margin: 0;
}

.student-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1rem;
}

.inline-form input[type='text'],
.inline-form input[type='password'],
.inline-form input[type='number'] {
  flex: 1;
  min-width: 180px;
}

.inline-form select {
  padding: 0.45rem 0.75rem;
  border-radius: 10px;
  border: 1px solid rgba(148, 163, 184, 0.4);
}

.category-list {
  list-style: none;
  padding: 0;
  margin: 1rem 0 0;
  display: grid;
  gap: 1rem;
}

.category-list li {
  background: rgba(248, 250, 252, 0.9);
  border-radius: 12px;
  padding: 1rem;
  box-shadow: inset 0 0 0 1px rgba(148, 163, 184, 0.15);
}

.category-list details {
  margin-top: 0.5rem;
}

.prepared-list {
  display: grid;
  gap: 1rem;
}

.prepared-item {
  padding: 1rem 1.25rem;
  border-radius: 16px;
  background: rgba(248, 250, 252, 0.75);
  box-shadow: inset 0 0 0 1px rgba(148, 163, 184, 0.15);
}

.prepared-item header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.question-stack {
  display: grid;
  gap: 1.25rem;
  margin-bottom: 1.5rem;
}

.question-card {
  border-radius: 16px;
  padding: 1.25rem;
  background: rgba(248, 250, 252, 0.9);
  box-shadow: inset 0 0 0 1px rgba(148, 163, 184, 0.15);
}

.question-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  margin-bottom: 0.75rem;
}

.form-actions {
  margin-top: 1.5rem;
}

.time-fields {
  margin: 1rem 0;
}

.checkbox {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 600;
  margin-top: 1rem;
}

@media (max-width: 600px) {
  .student-profile-header {
    gap: 1rem;
  }

  .student-avatar-large {
    width: 100px;
    height: 100px;
  }
}