body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: linear-gradient(180deg, #f4f7fb 0%, #eef4ff 100%);
  color: #1f2937;
}

.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 24px 16px 40px;
}

.hero {
  text-align: center;
  margin-bottom: 20px;
}

h1 {
  margin: 0 0 8px;
  font-size: 2.3rem;
}

.subtitle {
  margin: 0;
  color: #4b5563;
}

.card {
  background: #ffffff;
  border-radius: 20px;
  padding: 22px;
  margin-bottom: 20px;
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.08);
  border: 1px solid rgba(203, 213, 225, 0.7);
}

h2, h3 {
  margin-top: 0;
}

.field {
  margin-bottom: 18px;
}

.field-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 14px;
}

label {
  display: block;
  font-weight: bold;
  margin-bottom: 6px;
}

.required {
  color: #dc2626;
}

.helper {
  margin: 4px 0 0;
  color: #6b7280;
  font-size: 0.95rem;
}

select,
input[type="text"],
input[type="number"],
textarea {
  width: 100%;
  padding: 14px;
  font-size: 1rem;
  border: 1px solid #cbd5e1;
  border-radius: 14px;
  box-sizing: border-box;
  background: white;
  font-family: inherit;
}

textarea {
  resize: vertical;
}

.goal-grid,
.check-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.goal-card,
.check-card {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px;
  background: #f8fafc;
  border: 1px solid #cbd5e1;
  border-radius: 16px;
  cursor: pointer;
}

.goal-card input,
.check-card input,
.checkbox-row input {
  margin: 0;
  accent-color: #2563eb;
}

.notice {
  background: #eff6ff;
  color: #1e3a8a;
  border: 1px solid #bfdbfe;
  border-radius: 16px;
  padding: 14px 16px;
  margin-bottom: 18px;
}

.checkbox-row {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: normal;
  margin-top: 10px;
}

.error-box {
  background: #fef2f2;
  color: #991b1b;
  border: 1px solid #fecaca;
  border-radius: 14px;
  padding: 12px 14px;
  margin-bottom: 16px;
}

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

button {
  width: 100%;
  padding: 15px;
  font-size: 1rem;
  font-weight: bold;
  background: #2563eb;
  color: white;
  border: none;
  border-radius: 16px;
  cursor: pointer;
}

button:hover {
  background: #1d4ed8;
}

.summary-box {
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  border-radius: 16px;
  padding: 14px;
  line-height: 1.7;
  white-space: pre-line;
}

.session-card {
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  border-radius: 16px;
  padding: 14px;
  margin-bottom: 12px;
}

.plan-section {
  margin-top: 20px;
}

.plan-section ul {
  margin: 8px 0 0;
  padding-left: 20px;
  line-height: 1.7;
}

.hidden {
  display: none;
}

@media (max-width: 768px) {
  .field-grid,
  .goal-grid,
  .check-grid {
    grid-template-columns: 1fr;
  }

  .container {
    padding: 18px 12px 30px;
  }

  .card {
    padding: 18px;
  }
}