/* Modern Healthcare Theme CSS */
:root {
  --primary-color: #20b2aa; /* Light Sea Green */
  --secondary-color: #ff6b6b; /* Soft Red */
  --bg-color: #f7f9fb;
  --card-bg: #ffffff;
  --text-main: #2d3436;
  --text-sub: #636e72;
  --accent-color: #4a90e2;
  --border-radius: 12px;
  --box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
  --input-border: #dfe6e9;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-main);
  line-height: 1.6;
  padding: 20px;
}

.app-container {
  max-width: 1000px;
  margin: 0 auto;
}

header {
  text-align: center;
  margin-bottom: 40px;
}

header h1 {
  font-size: 2.5rem;
  color: var(--primary-color);
  margin-bottom: 8px;
}

header p {
  color: var(--text-sub);
}

main {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

@media (max-width: 768px) {
  main {
    grid-template-columns: 1fr;
  }
}

.card {
  background: var(--card-bg);
  padding: 24px;
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
  height: fit-content;
}

.card h2 {
  margin-bottom: 20px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--primary-color);
  font-size: 1.5rem;
}

/* Calendar Styles */
.calendar-container {
  margin-bottom: 20px;
  border: 1px solid var(--input-border);
  border-radius: 10px;
  padding: 15px;
}

.calendar-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 15px;
}

.calendar-header h3 {
  font-size: 1.1rem;
  color: var(--primary-color);
}

.calendar-header button {
  background: none;
  border: none;
  font-size: 1.2rem;
  cursor: pointer;
  color: var(--text-sub);
}

.calendar-grid-header {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  text-align: center;
  font-weight: bold;
  font-size: 0.8rem;
  color: var(--text-sub);
  margin-bottom: 10px;
}

.calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 5px;
}

.calendar-day {
  aspect-ratio: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  cursor: pointer;
  border-radius: 8px;
  font-size: 0.9rem;
  position: relative;
  transition: background 0.2s;
}

.calendar-day:hover {
  background: #f0fdfc;
}

.calendar-day.selected {
  background: var(--primary-color);
  color: white;
}

.calendar-day.today {
  border: 2px solid var(--primary-color);
}

.calendar-day.other-month {
  color: #ccc;
}

.dot {
  width: 4px;
  height: 4px;
  background-color: var(--secondary-color);
  border-radius: 50%;
  position: absolute;
  bottom: 4px;
}

.calendar-day.selected .dot {
  background-color: white;
}

.selected-date-display {
  background: #f8f9fa;
  padding: 10px;
  border-radius: 8px;
  text-align: center;
  margin-bottom: 20px;
  font-size: 0.9rem;
}

/* Workout Details Grid */
.workout-details-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-top: 10px;
}

.form-group {
  margin-bottom: 15px;
}

label {
  display: block;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-main);
  font-size: 0.9rem;
}

select, input {
  width: 100%;
  padding: 10px;
  border: 1px solid var(--input-border);
  border-radius: 8px;
  font-size: 0.95rem;
  transition: border-color 0.2s;
}

select:focus, input:focus {
  outline: none;
  border-color: var(--primary-color);
}

.primary-btn {
  width: 100%;
  padding: 12px;
  background-color: var(--primary-color);
  color: white;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: background-color 0.2s, transform 0.1s;
  margin-top: 10px;
}

.primary-btn:hover {
  background-color: #1a9c94;
  transform: translateY(-2px);
}

.secondary-btn {
  padding: 8px 16px;
  background-color: #ff7675;
  color: white;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.8rem;
}

.secondary-btn:hover {
  background-color: #d63031;
}

.hidden {
  display: none;
}

.list-display {
  margin-top: 24px;
}

.list-display h3 {
  font-size: 1.1rem;
  margin-bottom: 12px;
  color: var(--text-sub);
}

ul {
  list-style: none;
}

li {
  background: #fdfdfd;
  padding: 12px;
  border-radius: 6px;
  margin-bottom: 10px;
  border: 1px solid #f0f0f0;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.card-inner {
  background-color: #f0fdfc;
  padding: 16px;
  border-radius: 8px;
  margin: 20px 0;
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.form-grid .form-group:first-child {
  grid-column: span 2;
}

.summary-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  font-size: 0.95rem;
}

.summary-item strong {
  color: var(--primary-color);
}

footer {
  margin-top: 60px;
  text-align: center;
  padding-bottom: 40px;
  color: var(--text-sub);
}

footer p {
  margin-bottom: 15px;
}