:root {
  --bg: #f8fafc;
  --card: #ffffff;
  --ink: #1e293b;
  --muted: #64748b;
  --line: #e2e8f0;
  --primary: #3b82f6;
  --primary-light: #dbeafe;
  --primary-ink: #1e40af;
  --ring: #93c5fd;
  --ok: #10b981;
  --warn-bg: #fef3c7;
  --warn-ink: #b45309;
  --success: #10b981;
  --error: #ef4444;
  --teal: #0d9488;
  --teal-light: #f0fdfa;
  --radius: 12px;
  --radius-lg: 16px;
}

* { box-sizing: border-box; }
html, body { height: 100%; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
  color: var(--ink);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 16px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 20px;
  background: var(--card);
  color: var(--ink);
  border-bottom: 1px solid var(--line);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
  position: sticky;
  top: 0;
  z-index: 100;
}

.topbar h1 {
  font-size: 18px;
  margin: 0;
  font-weight: 700;
  background: linear-gradient(135deg, var(--primary), var(--teal));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.btn-voltar {
  appearance: none;
  border: 1px solid var(--line);
  background: var(--card);
  color: var(--ink);
  border-radius: var(--radius);
  padding: 10px 16px;
  font-weight: 600;
  font-size: 14px;
  cursor: pointer;
  transition: all 0.2s ease;
}

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

.info-aluno {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 20px;
  margin: 16px 0;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
  position: relative;
  overflow: hidden;
}

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

.info-aluno h3 {
  margin: 0 0 6px 0;
  font-size: 18px;
  font-weight: 700;
  color: var(--ink);
}

.info-aluno p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  font-weight: 500;
}

.tabs {
  display: flex;
  gap: 8px;
  margin: 16px 0;
  background: var(--line);
  padding: 6px;
  border-radius: var(--radius-lg);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.tab-btn {
  appearance: none;
  border: none;
  background: transparent;
  color: var(--muted);
  border-radius: var(--radius);
  padding: 12px 16px;
  font-weight: 600;
  font-size: 13px;
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
  flex: 1;
  min-width: 0;
}

.tab-btn.active,
.tab-btn[aria-selected="true"] {
  background: linear-gradient(135deg, var(--primary), #2563eb);
  color: white;
  box-shadow: 0 2px 8px rgba(59, 130, 246, 0.3);
}

.tab-btn:hover:not(.active):not([aria-selected="true"]) {
  background: rgba(255, 255, 255, 0.8);
  color: var(--ink);
}

.tab { display: none; }
.tab.active { display: block; animation: fadeIn 0.3s ease; }

.view { display: none; }
.view.active { display: block; }

fieldset {
  border: 1px solid var(--line);
  background: var(--card);
  border-radius: var(--radius-lg);
  padding: 20px;
  margin: 16px 0;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.04);
}

legend {
  margin-left: 4px;
  padding: 8px 14px;
  font-weight: 700;
  color: var(--teal);
  background: var(--teal-light);
  border-radius: var(--radius);
  border: 1px solid rgba(13, 148, 136, 0.2);
  font-size: 13px;
  letter-spacing: 0.3px;
}

.row {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin: 16px 0;
}

@media (min-width: 600px) {
  .row {
    flex-direction: row;
    flex-wrap: wrap;
  }
  .row > label {
    flex: 1;
    min-width: 250px;
  }
}

label {
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-weight: 600;
  color: var(--ink);
  font-size: 14px;
}

input[type="text"],
input[type="tel"],
input[type="date"],
input[type="number"],
input[type="email"],
select,
textarea {
  width: 100%;
  appearance: none;
  -webkit-appearance: none;
  border: 2px solid var(--line);
  background: var(--card);
  border-radius: var(--radius);
  padding: 14px 16px;
  height: 52px;
  outline: none;
  transition: all 0.2s ease;
  font-size: 16px;
  font-family: inherit;
  color: var(--ink);
}

select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  background-size: 20px;
  padding-right: 44px;
  cursor: pointer;
}

textarea {
  height: auto;
  min-height: 100px;
  resize: vertical;
  line-height: 1.5;
}

input:focus,
select:focus,
textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}

input::placeholder,
textarea::placeholder {
  color: var(--muted);
}

.checks {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin: 16px 0;
}

@media (min-width: 600px) {
  .checks {
    flex-direction: row;
    flex-wrap: wrap;
  }
  .checks > label {
    flex: 1;
    min-width: 180px;
  }
}

.checks label {
  flex-direction: row;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  background: var(--card);
  border: 2px solid var(--line);
  border-radius: var(--radius);
  cursor: pointer;
  transition: all 0.2s ease;
}

.checks label:hover {
  border-color: var(--primary);
  background: var(--primary-light);
}

.checks label:has(input:checked) {
  border-color: var(--primary);
  background: var(--primary-light);
}

input[type="checkbox"] {
  width: 22px;
  height: 22px;
  margin: 0;
  cursor: pointer;
  accent-color: var(--primary);
  border-radius: 6px;
}

.tab-actions {
  margin-top: 24px;
  padding: 20px 0;
  border-top: 1px solid var(--line);
  text-align: center;
}

.btn-salvar-aba {
  appearance: none;
  border: none;
  background: linear-gradient(135deg, var(--primary), #2563eb);
  color: #ffffff;
  border-radius: var(--radius);
  padding: 16px 32px;
  font-weight: 700;
  font-size: 16px;
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
  width: 100%;
  max-width: 320px;
}

.btn-salvar-aba:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(59, 130, 246, 0.4);
}

.btn-salvar-aba:active {
  transform: translateY(0);
}

.btn-salvar-aba:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.scrollbox {
  max-height: 200px;
  overflow: auto;
  padding: 16px;
  border: 2px solid var(--line);
  border-radius: var(--radius);
  background: var(--card);
  margin: 12px 0;
  font-size: 14px;
  line-height: 1.6;
}

.scrollbox::-webkit-scrollbar {
  width: 6px;
}

.scrollbox::-webkit-scrollbar-track {
  background: var(--line);
  border-radius: 3px;
}

.scrollbox::-webkit-scrollbar-thumb {
  background: var(--muted);
  border-radius: 3px;
}

.lista-filhos {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin: 20px 0;
}

.filho-card {
  background: var(--card);
  border: 2px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 16px;
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.04);
}

.filho-card:hover {
  border-color: var(--primary);
  background: var(--primary-light);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.15);
}

.filho-info {
  display: flex;
  align-items: center;
  gap: 14px;
}

.filho-avatar {
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, var(--primary), var(--teal));
  color: white;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 14px;
  flex-shrink: 0;
}

.filho-detalhes h3 {
  margin: 0 0 4px 0;
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
}

.filho-detalhes p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.saudacao {
  text-align: center;
  margin: 24px 0;
}

.saudacao h2 {
  font-size: 20px;
  font-weight: 700;
  color: var(--ink);
  margin: 0 0 6px 0;
}

.saudacao p {
  color: var(--muted);
  font-size: 14px;
  margin: 0;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 40px;
  color: var(--muted);
}

.spinner {
  width: 24px;
  height: 24px;
  border: 3px solid var(--line);
  border-top: 3px solid var(--primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.screen { display: none; }
.screen.active { display: block; }

#initial-loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
  gap: 16px;
}

#initial-loading.active { display: flex; }