@import url('https://cdn.jsdelivr.net/gh/orioncactus/pretendard/dist/web/static/pretendard.css');

:root {
  --bg-color: #f8f9fa;
  --surface-color: #ffffff;
  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --primary-color: #003E7E;
  --primary-hover: #002D5C;
  --border-color: #e2e8f0;
  --danger-color: #ef4444;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --modal-bg: rgba(0, 0, 0, 0.5);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: 'Pretendard', sans-serif;
}

body {
  background-color: var(--bg-color);
  color: var(--text-primary);
  line-height: 1.5;
}

.app-container {
  display: flex;
  width: 100%;
  height: 100vh;
  overflow: hidden;
}

.sidebar {
  width: 250px;
  background-color: var(--surface-color);
  border-right: 1px solid var(--border-color);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 2rem;
  flex-shrink: 0;
}

.header-content {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.5rem;
}

h1 {
  font-size: 1.5rem;
  color: var(--primary-color);
  font-weight: 800;
}

#offline-indicator {
  background-color: var(--danger-color);
  color: white;
  padding: 0.25rem 0.75rem;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: bold;
}

.hidden {
  display: none !important;
}

nav {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.5rem;
}

nav button {
  background: none !important;
  border: none !important;
  padding: 0.75rem 1rem;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s ease;
  width: 100%;
  text-align: left;
}

nav button:hover {
  color: var(--primary-color);
  background: none !important;
}

nav button.active {
  color: var(--primary-color);
  font-weight: 800;
  background: none !important;
}

main.content {
  flex-grow: 1;
  padding: 2rem;
  overflow-y: auto;
}

.controls {
  display: flex;
  justify-content: space-between;
  margin-bottom: 1.5rem;
}

select, input[type="text"], input[type="date"], input[type="color"] {
  padding: 0.5rem;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  font-size: 1rem;
  outline: none;
}

select:focus, input[type="text"]:focus, input[type="date"]:focus {
  border-color: var(--primary-color);
}

.primary-btn {
  background-color: var(--primary-color);
  color: white;
  border: none;
  padding: 0.5rem 1rem;
  border-radius: 6px;
  cursor: pointer;
  font-weight: 600;
  transition: background-color 0.2s;
}

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

.secondary-btn {
  background-color: #f1f5f9;
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  padding: 0.5rem 1rem;
  border-radius: 6px;
  cursor: pointer;
  font-weight: 600;
  transition: background-color 0.2s;
}

.secondary-btn:hover {
  background-color: #e2e8f0;
}

.schedule-container {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  align-items: start;
}

@media (max-width: 1024px) {
  .schedule-container {
    grid-template-columns: repeat(2, 1fr);
  }
}

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

.schedule-card {
  background-color: var(--surface-color);
  border-radius: 12px;
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  border-left: 6px solid var(--theme-color, #ccc);
  transition: transform 0.2s, box-shadow 0.2s;
}

.schedule-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

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

.schedule-title {
  font-size: 1.25rem;
  font-weight: 700;
}

.schedule-meta {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.d-day-badge {
  background-color: #f1f5f9;
  color: var(--text-primary);
  padding: 0.25rem 0.75rem;
  border-radius: 6px;
  font-weight: 700;
  font-size: 0.9rem;
}

.d-day-urgent {
  background-color: #fee2e2;
  color: #ef4444;
}



.session-selector {
  margin-bottom: 1rem;
}

.session-dropdown {
  width: auto;
  min-width: 200px;
  background-color: #f8fafc;
}

.tasks-list {
  list-style: none;
  padding: 0;
}

.task-item {
  display: flex;
  align-items: center;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--border-color);
  gap: 0.5rem;
}

.task-item:last-child {
  border-bottom: none;
}

.task-checkbox, .task-checkbox-sub {
  width: 1rem;
  height: 1rem;
  cursor: pointer;
}

.task-item input[type="checkbox"] {
  margin-right: 1rem;
  width: 1.25rem;
  height: 1.25rem;
  cursor: pointer;
  accent-color: var(--primary-color);
}

.task-item.completed .task-name {
  text-decoration: line-through;
  color: var(--text-secondary);
}

.task-name {
  flex-grow: 1;
  font-weight: 500;
}

.task-date {
  color: var(--text-secondary);
  font-size: 0.85rem;
}

.task-dday {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--primary-color);
  margin-left: auto;
  background-color: #f1f5f9;
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
}

.task-item.completed .task-dday {
  color: var(--text-secondary);
  background-color: transparent;
}

.completed-event {
  opacity: 0.4 !important;
}

.active-task-indicator {
  margin-left: 0.5rem;
  font-size: 0.75rem;
  background-color: var(--primary-color);
  color: white;
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  font-weight: 600;
}

/* Modal */
.modal {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background-color: var(--modal-bg);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 1000;
  padding: 1rem;
  backdrop-filter: blur(4px);
}

.modal-content {
  background-color: var(--surface-color);
  padding: 2rem;
  border-radius: 12px;
  width: 100%;
  max-width: 500px;
  max-height: 90vh;
  overflow-y: auto;
  position: relative;
  box-shadow: var(--shadow-md);
}

.close-btn {
  position: absolute;
  top: 1rem;
  right: 1.5rem;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--text-secondary);
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 600;
  color: var(--text-primary);
}

.form-group input[type="text"], .form-group input[type="date"] {
  width: 100%;
}

.search-group {
  display: flex;
  gap: 0.5rem;
}

.search-group input {
  flex-grow: 1;
}

.color-picker-container {
  display: flex;
  gap: 1rem;
  align-items: center;
}

.preset-colors {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.color-circle {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  cursor: pointer;
  border: 2px solid transparent;
  transition: transform 0.1s;
  position: relative;
}

.color-circle:hover {
  transform: scale(1.1);
}

.color-circle.selected {
  border-color: #1e293b;
  box-shadow: 0 0 0 2px #fff inset;
}

.color-circle.used::after {
  content: "✓";
  position: absolute;
  top: -4px;
  right: -4px;
  background-color: #1e293b;
  color: white;
  border-radius: 50%;
  width: 14px;
  height: 14px;
  font-size: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.task-input-row {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
  align-items: center;
}

.task-input-row input[type="text"] {
  flex-grow: 1;
}

.btn-remove-row {
  background: none;
  border: none;
  color: var(--danger-color);
  cursor: pointer;
  font-weight: bold;
  padding: 0.5rem;
}

.full-width {
  width: 100%;
  padding: 0.75rem;
  font-size: 1.1rem;
}

.api-result-item {
  padding: 1rem;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  margin-bottom: 0.5rem;
  cursor: pointer;
  transition: background-color 0.2s, border-color 0.2s;
}

.api-result-item:hover {
  background-color: var(--bg-color);
  border-color: var(--primary-color);
}

#calendar-main, #calendar-sub {
  background-color: var(--surface-color);
  padding: 1.5rem;
  border-radius: 16px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.03);
  border: 1px solid rgba(0,0,0,0.05);
  overflow: hidden;
  height: 100%;
}

.fc-toolbar-title {
  font-size: 1.25rem !important;
  font-weight: 800 !important;
  color: var(--text-primary);
}

.fc-button-primary {
  background-color: transparent !important;
  border-color: transparent !important;
  color: var(--primary-color) !important;
  --fc-button-text-color: var(--primary-color) !important;
  --fc-button-icon-color: var(--primary-color) !important;
  border-radius: 8px !important;
  text-transform: capitalize;
  box-shadow: none !important;
}

.fc-button-primary .fc-icon {
  color: var(--primary-color) !important;
}

.fc-button-primary:hover {
  background-color: rgba(0, 62, 126, 0.05) !important;
}

.fc-button-primary:not(:disabled):active, .fc-button-primary:not(:disabled).fc-button-active {
  background-color: rgba(0, 62, 126, 0.1) !important;
  border-color: transparent !important;
  color: #002D5C !important;
  box-shadow: none !important;
}

.fc-day-sun .fc-col-header-cell-cushion,
.fc-day-sun .fc-daygrid-day-number {
  color: var(--danger-color) !important;
}

.fc-day-sat .fc-col-header-cell-cushion,
.fc-day-sat .fc-daygrid-day-number {
  color: var(--primary-color) !important;
}

.fc-event {
  cursor: pointer;
  border-width: 2px !important;
  border-style: solid !important;
  background-color: #ffffff !important;
  color: #1e293b !important;
  padding: 2px 4px;
  border-radius: 4px;
  font-weight: 600;
}

.fc-event-main {
  color: #1e293b !important;
}

.input-mode-selector {
  margin-bottom: 1.5rem;
  display: flex;
  gap: 1.5rem;
  padding: 1rem;
  background-color: var(--bg-color);
  border-radius: 8px;
}

.input-mode-selector label {
  cursor: pointer;
  font-weight: 500;
}

.mt-2 { margin-top: 0.5rem; }
.mt-4 { margin-top: 1rem; }