/* ===================== */
/* Global Styles */
/* ===================== */
:root {
  --bs-primary: #2563eb;
  --bs-secondary: #64748b;
  --bs-success: #059669;
  --bs-info: #0891b2;
  --bs-warning: #d97706;
  --bs-danger: #dc2626;
  --bs-light: #f8fafc;
  --bs-dark: #1e293b;
  --bs-white: #ffffff;
  --bs-gray: #6b7280;
  --bs-gray-dark: #374151;
  --bs-gray-100: #f3f4f6;
  --bs-gray-200: #e5e7eb;
  --bs-gray-300: #d1d5db;
  --bs-gray-400: #9ca3af;
  --bs-gray-500: #6b7280;
  --bs-gray-600: #4b5563;
  --bs-gray-700: #374151;
  --bs-gray-800: #1f2937;
  --bs-gray-900: #111827;
}

body {
  font-family: 'Inter', 'Noto Sans JP', system-ui, -apple-system, sans-serif;
  background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
  color: var(--bs-gray-800);
  line-height: 1.6;
  font-weight: 400;
}

/* ===================== */
/* Learning Flow Nav */
/* ===================== */
.learning-flow-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.7rem;
  background: transparent;
  border: none;
  border-radius: 0;
  padding: 0.2rem 0 0.1rem;
  box-shadow: none;
}

.learning-flow-steps {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  margin: 0;
  padding: 0.22rem 0.28rem;
  list-style: none;
  flex-wrap: wrap;
  background: rgba(148, 163, 184, 0.12);
  border-radius: 999px;
}

.learning-flow-step {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
}

.learning-flow-step + .learning-flow-step::before {
  content: '›';
  color: var(--bs-gray-400);
  font-weight: 700;
  margin: 0 0.2rem 0 0.1rem;
}

.learning-flow-link,
.learning-flow-current {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  border-radius: 999px;
  padding: 0.3rem 0.6rem;
  font-size: 0.84rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  white-space: nowrap;
  border: 1px solid transparent;
}

.learning-flow-link {
  background: transparent;
  color: #475569;
  text-decoration: none;
}

.learning-flow-current {
  background: #ffffff;
  color: #7f1d1d;
  border-color: #fecaca;
}

/* Current state theme colors */
.learning-flow-current.is-red {
  background: #fee2e2;
  color: #7f1d1d;
  border-color: #fecaca;
}

.learning-flow-current.is-yellow {
  background: #fef3c7;
  color: #92400e;
  border-color: #fcd34d;
}

.learning-flow-current.is-green {
  background: #dcfce7;
  color: #166534;
  border-color: #bbf7d0;
}

/* Done state colors by theme */
.learning-flow-step.is-done .learning-flow-link {
  background: #ecfdf5;
  border-color: #d1fae5;
  color: #166534;
}

.learning-flow-step.is-done .learning-flow-link.is-red {
  background: #fee2e2;
  border-color: #fecaca;
  color: #7f1d1d;
}

.learning-flow-step.is-done .learning-flow-link.is-yellow {
  background: #fef3c7;
  border-color: #fcd34d;
  color: #92400e;
}

.learning-flow-step.is-done .learning-flow-link.is-green {
  background: #dcfce7;
  border-color: #bbf7d0;
  color: #166534;
}

.learning-flow-task-title {
  min-width: 0;
}

.learning-flow-task-name {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  border-radius: 999px;
  padding: 0.26rem 0.64rem;
  font-size: 0.82rem;
  color: var(--bs-gray-700);
  font-weight: 600;
  background: rgba(148, 163, 184, 0.1);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 19rem;
}

.learning-flow-level-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.26rem 0.64rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 700;
  line-height: 1;
}

.learning-flow-level-badge.is-beginner {
  background: linear-gradient(135deg, #dcfce7, #bbf7d0);
  color: #166534;
}

.learning-flow-level-badge.is-intermediate {
  background: linear-gradient(135deg, #fef3c7, #fde68a);
  color: #92400e;
}

.learning-flow-level-badge.is-advanced {
  background: linear-gradient(135deg, #fee2e2, #fecaca);
  color: #991b1b;
}

/* ===================== */
/* Typography */
/* ===================== */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.3;
  color: var(--bs-gray-900);
}

h1 { font-size: 2.25rem; }
h2 { font-size: 1.875rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

/* ===================== */
/* Sections */
/* ===================== */
.sample-section {
  background: var(--bs-white);
  border-radius: 1rem;
  padding: 2.5rem;
  margin-bottom: 2rem;
  border: 1px solid var(--bs-gray-200);
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  animation: fadeInUp 0.6s ease-out;
  animation-fill-mode: both;
  transition: none;
}

.sample-section:hover {
  transition: all 0.3s ease;
  box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  transform: translateY(-2px);
}

.section-title {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 2rem;
  color: var(--bs-gray-900);
  position: relative;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -0.5rem;
  left: 0;
  width: 3rem;
  height: 4px;
  background: linear-gradient(90deg, var(--bs-primary), var(--bs-info));
  border-radius: 2px;
}

/* ===================== */
/* Cards */
/* ===================== */
.sample-card {
  background: var(--bs-white);
  border: 1px solid var(--bs-gray-200);
  border-radius: 1rem;
  padding: 2rem;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  transition: all 0.3s ease;
}

.sample-card:hover {
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  transform: translateY(-2px);
}

.card-title {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
  color: var(--bs-gray-900);
}

/* ===================== */
/* Task Cards */
/* ===================== */
.task-card {
  background: var(--bs-white);
  border: 2px solid var(--bs-gray-200);
  border-radius: 1rem;
  padding: 2rem;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.task-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--bs-primary), var(--bs-info));
}

.task-card:hover {
  border-color: var(--bs-primary);
  box-shadow: 0 8px 25px rgba(37, 99, 235, 0.15);
  transform: translateY(-4px);
}

.task-card h4 {
  font-size: 1.25rem;
  font-weight: 600;
  margin: 0.75rem 0 1rem 0;
  color: var(--bs-gray-900);
}

.task-level {
  display: inline-flex;
  align-items: center;
  padding: 0.5rem 1rem;
  border-radius: 50px;
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

.task-card-beginner .task-level {
  background: linear-gradient(135deg, #dcfce7, #bbf7d0);
  color: #166534;
}

.task-card-intermediate .task-level {
  background: linear-gradient(135deg, #fef3c7, #fde68a);
  color: #92400e;
}

.task-card-advanced .task-level {
  background: linear-gradient(135deg, #fee2e2, #fecaca);
  color: #991b1b;
}

.task-description {
  font-size: 1rem;
  color: var(--bs-gray-600);
  margin: 1rem 0;
  line-height: 1.6;
}

/* ===================== */
/* Buttons */
/* ===================== */
.button-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.btn {
  border-radius: 0.75rem;
  font-weight: 500;
  padding: 0.75rem 1.5rem;
  transition: all 0.3s ease;
  border: none;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

.btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.btn-primary {
  background: linear-gradient(135deg, var(--bs-primary), #1d4ed8);
  color: white;
}

.btn-primary:hover {
  background: linear-gradient(135deg, #1d4ed8, #1e40af);
}

.btn-success {
  background: linear-gradient(135deg, var(--bs-success), #047857);
  color: white;
}

.btn-success:hover {
  background: linear-gradient(135deg, #047857, #065f46);
}

.btn-info {
  background: linear-gradient(135deg, var(--bs-info), #0e7490);
  color: white;
}

.btn-info:hover {
  background: linear-gradient(135deg, #0e7490, #155e75);
  color: white;
}

.btn-info:focus,
.btn-info:active {
  color: white;
}

.btn-warning {
  background: linear-gradient(135deg, var(--bs-warning), #b45309);
  color: white;
}

.btn-warning:hover {
  background: linear-gradient(135deg, #b45309, #92400e);
  color: white;
}

.btn-warning:focus,
.btn-warning:active {
  color: white;
}

.btn-danger {
  background: linear-gradient(135deg, var(--bs-danger), #b91c1c);
  color: white;
}

.btn-danger:hover {
  background: linear-gradient(135deg, #b91c1c, #991b1b);
}

.btn-secondary {
  background: linear-gradient(135deg, var(--bs-gray-500), var(--bs-gray-600));
  color: white;
}

.btn-secondary:hover {
  background: linear-gradient(135deg, var(--bs-gray-600), var(--bs-gray-700));
}

.btn-outline-primary:hover,
.btn-outline-danger:hover,
.btn-outline-info:hover,
.btn-outline-secondary:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

/* ===================== */
/* Forms */
/* ===================== */
.login-form,
.sample-form,
.survey-form,
.consent-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.form-label {
  font-weight: 600;
  color: var(--bs-gray-900);
  margin-bottom: 0.5rem;
  font-size: 0.95rem;
}

.form-control,
.form-select {
  border-radius: 0.75rem;
  border: 2px solid var(--bs-gray-300);
  padding: 0.75rem 1rem;
  font-size: 1rem;
  transition: all 0.3s ease;
  background: var(--bs-white);
}

.form-control:focus,
.form-select:focus {
  border-color: var(--bs-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
  outline: none;
}

.form-control::placeholder {
  color: var(--bs-gray-400);
}

/* ===================== */
/* Evaluation Cards */
/* ===================== */
.evaluation-card {
  background: var(--bs-white);
  border: 1px solid var(--bs-gray-200);
  border-radius: 1rem;
  padding: 2rem;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  transition: all 0.3s ease;
}

.evaluation-card:hover {
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  transform: translateY(-2px);
}

.evaluation-card h4 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
  color: var(--bs-gray-900);
}

.evaluation-level {
  margin-bottom: 1rem;
}

.level-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem 1rem;
  border-radius: 50px;
  font-size: 0.9rem;
  font-weight: 600;
  color: white;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.level-badge.level-1 {
  background: linear-gradient(135deg, var(--bs-danger), #b91c1c);
}

.level-badge.level-2 {
  background: linear-gradient(135deg, #f97316, #ea580c);
}

.level-badge.level-3 {
  background: linear-gradient(135deg, #eab308, #ca8a04);
  color: #000;
}

.level-badge.level-4 {
  background: linear-gradient(135deg, var(--bs-primary), #1d4ed8);
}

.level-badge.level-5 {
  background: linear-gradient(135deg, var(--bs-success), #047857);
}

.evaluation-description {
  font-size: 1rem;
  color: var(--bs-gray-600);
  margin: 1rem 0;
  line-height: 1.6;
}

.star-rating {
  font-size: 1.75rem;
  color: #fbbf24;
  letter-spacing: 0.25rem;
}

.star {
  display: inline-block;
  transition: all 0.3s ease;
}

.star.filled {
  color: #fbbf24;
  text-shadow: 0 0 8px rgba(251, 191, 36, 0.3);
}

.star:not(.filled) {
  color: var(--bs-gray-300);
}

/* ===================== */
/* Consent Card */
/* ===================== */
.consent-card {
  background: var(--bs-white);
  border: 1px solid var(--bs-gray-200);
  border-radius: 1rem;
  padding: 2.5rem;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.consent-card h3 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
  color: var(--bs-gray-900);
}

.consent-text {
  background: linear-gradient(135deg, var(--bs-gray-100), var(--bs-gray-50));
  padding: 1.5rem;
  border-radius: 0.75rem;
  border-left: 4px solid var(--bs-primary);
  line-height: 1.7;
}

.consent-text p {
  margin-bottom: 1rem;
  color: var(--bs-gray-700);
}

.form-check {
  margin-bottom: 1rem;
}

.form-check-input {
  border-radius: 0.5rem;
  border: 2px solid var(--bs-gray-300);
  width: 1.25rem;
  height: 1.25rem;
}

.form-check-input:checked {
  background-color: var(--bs-primary);
  border-color: var(--bs-primary);
}

.form-check-label {
  margin-left: 0.75rem;
  color: var(--bs-gray-700);
  font-weight: 500;
  cursor: pointer;
}

/* ===================== */
/* Tables */
/* ===================== */
.table {
  margin-bottom: 0;
  background: var(--bs-white);
  border-radius: 0.75rem;
  overflow: hidden;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.table thead {
  border-bottom: 2px solid var(--bs-gray-200);
}

.table-primary {
  background: linear-gradient(135deg, #eff6ff, #dbeafe);
}

.table-primary th {
  background: linear-gradient(135deg, var(--bs-primary), #1d4ed8);
  color: white;
  font-weight: 600;
  border: none;
  padding: 1rem;
}

.table-info {
  background: linear-gradient(135deg, #f0f9ff, #bae6fd);
}

.table-info th {
  background: linear-gradient(135deg, var(--bs-info), #0e7490);
  color: white;
  font-weight: 600;
  border: none;
  padding: 1rem;
}

.table-success {
  background: linear-gradient(135deg, #f0fdf4, #bbf7d0);
}

.table-success th {
  background: linear-gradient(135deg, var(--bs-success), #047857);
  color: white;
  font-weight: 600;
  border: none;
  padding: 1rem;
}

.table tbody tr {
  border-bottom: 1px solid var(--bs-gray-200);
  transition: all 0.3s ease;
}

.table tbody tr:hover {
  background: linear-gradient(135deg, var(--bs-gray-50), var(--bs-gray-25));
  transform: scale(1.01);
}

.table tbody td {
  padding: 1rem;
  vertical-align: middle;
  color: var(--bs-gray-700);
}

/* ===================== */
/* Alerts */
/* ===================== */
.alert {
  border-radius: 0.75rem;
  border: none;
  padding: 1rem 1.5rem;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  position: relative;
  overflow: hidden;
}

.alert::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: currentColor;
}

.alert-info {
  background: linear-gradient(135deg, #cffafe, #a5f3fc);
  color: #0c4a6e;
}

.alert-success {
  background: linear-gradient(135deg, #dcfce7, #bbf7d0);
  color: #166534;
}

.alert-warning {
  background: linear-gradient(135deg, #fff1f2, #ffe4e6);
  color: #9f1239;
}

.alert-danger {
  background: linear-gradient(135deg, #fee2e2, #fecaca);
  color: #991b1b;
}

/* ===================== */
/* Modals */
/* ===================== */
.modal-content {
  border-radius: 1rem;
  border: 1px solid var(--bs-gray-200);
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

.modal-header {
  border-bottom: 1px solid var(--bs-gray-200);
  border-radius: 1rem 1rem 0 0;
  padding: 1.5rem 2rem;
}

.modal-header.bg-primary {
  background: linear-gradient(135deg, var(--bs-primary), #1d4ed8) !important;
}

.modal-header.bg-warning {
  background: linear-gradient(135deg, var(--bs-warning), #b45309) !important;
}

.modal-title {
  font-weight: 600;
  color: var(--bs-gray-900);
  font-size: 1.25rem;
}

.modal-header.bg-primary .modal-title,
.modal-header.bg-warning .modal-title {
  color: white;
}

.modal-body {
  color: var(--bs-gray-700);
  padding: 2rem;
  line-height: 1.6;
}

.modal-footer {
  border-top: 1px solid var(--bs-gray-200);
  padding: 1.5rem 2rem;
}

/* ===================== */
/* Badges */
/* ===================== */
.badge {
  border-radius: 50px;
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  font-weight: 600;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

.badge.bg-success {
  background: linear-gradient(135deg, var(--bs-success), #047857) !important;
}

.badge.bg-warning {
  background: linear-gradient(135deg, var(--bs-warning), #b45309) !important;
  color: white;
}

.badge.bg-danger {
  background: linear-gradient(135deg, var(--bs-danger), #b91c1c) !important;
}

.badge.bg-primary {
  background: linear-gradient(135deg, var(--bs-primary), #1d4ed8) !important;
}

.badge.bg-secondary {
  background: linear-gradient(135deg, var(--bs-gray-500), var(--bs-gray-600)) !important;
}

.notification-badge {
  right: -0.35rem !important;
  left: auto !important;
  transform: translateY(-50%) !important;
  min-width: 1.25rem;
  height: 1.25rem;
  padding: 0.2rem 0.35rem;
}

.notification-badge::before {
  content: '';
}

/* ===================== */
/* AI Waiting Patterns */
/* ===================== */
.ai-wait-card {
  background: #ffffff;
  border: 1px solid var(--bs-gray-200);
  border-radius: 0.9rem;
  padding: 1.1rem;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

.ai-wait-title {
  font-size: 0.98rem;
  font-weight: 600;
  color: var(--bs-gray-900);
}

.ai-wait-skeleton {
  border: 1px dashed #cbd5e1;
  border-radius: 0.75rem;
  padding: 0.8rem;
  background: #f8fafc;
}

.skeleton-line {
  height: 0.72rem;
  border-radius: 999px;
  background: linear-gradient(90deg, #e5e7eb 0%, #f3f4f6 50%, #e5e7eb 100%);
  background-size: 220% 100%;
  margin-bottom: 0.62rem;
  animation: skeletonShimmer 1.4s infinite linear;
}

.skeleton-line:last-child {
  margin-bottom: 0;
}

/* ===================== */
/* Responsive */
/* ===================== */
@media (max-width: 768px) {
  .sample-section {
    padding: 1.5rem;
    margin-bottom: 1.5rem;
  }

  .learning-flow-nav {
    flex-direction: column;
    align-items: stretch;
    gap: 0.45rem;
    padding: 0.1rem 0;
  }

  .learning-flow-steps {
    gap: 0.2rem;
    padding: 0.22rem;
  }

  .learning-flow-link,
  .learning-flow-current {
    font-size: 0.8rem;
    padding: 0.28rem 0.52rem;
  }

  .learning-flow-task-title {
    align-self: flex-start;
  }

  .learning-flow-task-name {
    max-width: 100%;
    white-space: normal;
  }

  .section-title {
    font-size: 1.75rem;
  }

  .button-group {
    gap: 0.5rem;
  }

  .button-group .btn {
    padding: 0.6rem 1.2rem;
    font-size: 0.9rem;
  }

  .task-card,
  .sample-card,
  .evaluation-card,
  .consent-card {
    padding: 1.5rem;
  }

  .table-responsive {
    border-radius: 0.5rem;
  }
}

/* ===================== */
/* Animations */
/* ===================== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes skeletonShimmer {
  0% {
    background-position: 200% 0;
  }
  100% {
    background-position: -200% 0;
  }
}

.sample-section:nth-of-type(1) { animation-delay: 0.1s; }
.sample-section:nth-of-type(2) { animation-delay: 0.2s; }
.sample-section:nth-of-type(3) { animation-delay: 0.3s; }
.sample-section:nth-of-type(4) { animation-delay: 0.4s; }
.sample-section:nth-of-type(5) { animation-delay: 0.5s; }
.sample-section:nth-of-type(6) { animation-delay: 0.6s; }
.sample-section:nth-of-type(7) { animation-delay: 0.7s; }
.sample-section:nth-of-type(8) { animation-delay: 0.8s; }
.sample-section:nth-of-type(9) { animation-delay: 0.9s; }
.sample-section:nth-of-type(10) { animation-delay: 1.0s; }

.mobile-nav {
  border-top: 1px solid rgba(15, 23, 42, 0.08);
}

.mobile-nav .nav-link,
.mobile-nav .btn {
  width: 100%;
}