@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700&display=swap');

:root {
  --primary-color: #2e8b57; 
  --primary-light: #43c077;
  --primary-dark: #1f613c;
  --secondary-color: #f0fdf4; 
  --text-main: #1a3c2a;
  --text-muted: #4b7b5d;
  --bg-gradient: linear-gradient(135deg, #d1fae5 0%, #a7f3d0 50%, #6ee7b7 100%);
  --glass-bg: rgba(255, 255, 255, 0.65);
  --glass-border: rgba(255, 255, 255, 0.5);
  --glass-shadow: 0 8px 32px 0 rgba(46, 139, 87, 0.15);
  --glass-bg-hover: rgba(255, 255, 255, 0.85);
  --card-bg: rgba(255, 255, 255, 0.4);
  --card-bg-hover: rgba(255, 255, 255, 0.9);
  --input-bg: rgba(255, 255, 255, 0.7);
  --btn-disabled: #a7f3d0;
  --transition-speed: 0.3s;
}

body.dark-mode {
  --primary-color: #2e8b57;
  --primary-light: #1f613c;
  --primary-dark: #8fe5b4;
  --secondary-color: #0b140e;
  --text-main: #e2f1e8;
  --text-muted: #a0c2af;
  --bg-gradient: linear-gradient(135deg, #0b140e 0%, #15291d 50%, #1a3c2a 100%);
  --glass-bg: rgba(20, 30, 25, 0.65);
  --glass-border: rgba(255, 255, 255, 0.1);
  --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.4);
  --glass-bg-hover: rgba(30, 45, 35, 0.85);
  --card-bg: rgba(255, 255, 255, 0.05);
  --card-bg-hover: rgba(255, 255, 255, 0.15);
  --input-bg: rgba(0, 0, 0, 0.4);
  --btn-disabled: #2d4a3a;
}

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

body {
  background: var(--bg-gradient);
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  color: var(--text-main);
  overflow-x: hidden;
  transition: background var(--transition-speed) ease, color var(--transition-speed) ease;
}

.app-container {
  display: flex;
  width: 95%;
  max-width: 1400px;
  height: 90vh;
  gap: 20px;
}

/* Glassmorphism utility */
.glass-panel {
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  border-radius: 24px;
  box-shadow: var(--glass-shadow);
  padding: 30px;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-speed) ease;
}

/* Main Content Area */
.main-content {
  flex: 3;
  position: relative;
  overflow: hidden;
}

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

.header h1 {
  font-size: 2.5rem;
  color: var(--primary-dark);
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  transition: color var(--transition-speed);
}

.header p {
  color: var(--text-muted);
  font-size: 1.1rem;
}

.theme-btn {
  position: absolute;
  top: 0;
  right: 0;
  background: var(--card-bg);
  border: 1px solid var(--glass-border);
  border-radius: 50%;
  width: 45px;
  height: 45px;
  font-size: 1.5rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-speed);
  box-shadow: var(--glass-shadow);
  color: var(--text-main);
}
.theme-btn:hover {
  background: var(--glass-bg-hover);
  transform: scale(1.1);
}

/* Tabs */
.tab-container {
  flex: 1;
  position: relative;
  overflow-y: auto;
  padding-bottom: 20px;
  scrollbar-width: none;
  -ms-overflow-style: none;
}
.tab-container::-webkit-scrollbar {
  display: none;
}

.tab {
  display: none;
  animation: slideUp 0.5s ease forwards;
  opacity: 0;
  transform: translateY(20px);
}

.tab.active {
  display: block;
}

@keyframes slideUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.tab-title {
  font-size: 1.8rem;
  margin-bottom: 20px;
  color: var(--primary-dark);
  text-align: center;
}

/* Options Grid */
.options-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 15px;
  margin-bottom: 30px;
}

.option-card {
  background: var(--card-bg);
  border: 2px solid transparent;
  border-radius: 16px;
  padding: 20px;
  text-align: center;
  cursor: pointer;
  transition: all 0.3s ease;
  font-weight: 600;
  font-size: 1.1rem;
  color: var(--text-main);
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
}

.option-card:hover {
  background: var(--card-bg-hover);
  transform: translateY(-5px);
  box-shadow: 0 8px 15px rgba(46, 139, 87, 0.2);
}

.option-card.selected {
  background: var(--primary-color);
  color: white;
  border-color: var(--primary-dark);
  box-shadow: 0 0 15px rgba(46, 139, 87, 0.4);
}

/* Specific groupings */
.group-title {
  font-size: 1.2rem;
  margin-bottom: 15px;
  color: var(--text-muted);
  border-bottom: 2px solid var(--glass-border);
  padding-bottom: 5px;
}

/* Form Elements */
.input-group {
  margin-bottom: 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.text-input {
  width: 80%;
  max-width: 400px;
  padding: 15px 20px;
  border-radius: 12px;
  border: 2px solid var(--glass-border);
  background: var(--input-bg);
  font-size: 1.1rem;
  color: var(--text-main);
  outline: none;
  transition: all 0.3s;
}

.text-input:focus {
  border-color: var(--primary-color);
  background: var(--glass-bg);
  box-shadow: 0 0 10px rgba(46, 139, 87, 0.2);
}

/* Lists */
.exam-list {
  display: flex;
  flex-direction: column;
  gap: 15px;
}

.exam-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--card-bg);
  padding: 15px 20px;
  border-radius: 12px;
  border: 1px solid var(--glass-border);
  transition: all 0.2s;
}

.exam-item:hover {
  background: var(--card-bg-hover);
  transform: scale(1.01);
}

.exam-item label {
  display: flex;
  align-items: center;
  gap: 15px;
  font-size: 1.2rem;
  font-weight: 500;
  cursor: pointer;
  flex: 1;
}

.exam-item input[type="checkbox"] {
  width: 20px;
  height: 20px;
  accent-color: var(--primary-color);
  cursor: pointer;
}

.exam-date {
  font-size: 0.9rem;
  color: var(--text-muted);
  background: var(--secondary-color);
  padding: 4px 10px;
  border-radius: 20px;
}

.calendar-btn {
  background: var(--primary-color);
  color: white;
  border: none;
  padding: 8px 15px;
  border-radius: 8px;
  font-size: 0.9rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: background 0.3s;
  text-decoration: none;
}

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

/* Footer Navigation */
.footer-nav {
  display: flex;
  justify-content: space-between;
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px solid var(--glass-border);
}

.nav-btn {
  padding: 12px 30px;
  border-radius: 12px;
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s;
  border: none;
}

.btn-back {
  background: var(--card-bg);
  color: var(--text-main);
}

.btn-back:hover {
  background: var(--card-bg-hover);
}

.btn-next {
  background: var(--primary-color);
  color: white;
  box-shadow: 0 4px 15px rgba(46, 139, 87, 0.3);
}

.btn-next:hover {
  background: var(--primary-light);
  transform: translateY(-2px);
}

.btn-next:disabled {
  background: var(--btn-disabled);
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
  color: rgba(255,255,255,0.6);
}

/* Sidebar */
.sidebar {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.info-widget {
  flex: 1;
  overflow-y: auto;
}

.info-widget h2 {
  font-size: 1.4rem;
  color: var(--primary-dark);
  margin-bottom: 15px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.info-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.info-card {
  background: var(--card-bg);
  padding: 15px;
  border-radius: 12px;
  border-left: 4px solid var(--primary-color);
  transition: all 0.2s;
}

.info-card:hover {
  background: var(--card-bg-hover);
  transform: translateX(5px);
}

.info-card h3 {
  font-size: 1.1rem;
  color: var(--primary-dark);
  margin-bottom: 5px;
}

.info-card p {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.4;
}

.suggest-widget {
  background: var(--card-bg);
  border: 1px dashed var(--primary-color);
}

.suggest-widget h3 {
  color: var(--primary-dark);
  margin-bottom: 10px;
}

.suggest-widget p {
  font-size: 0.9rem;
  margin-bottom: 15px;
  color: var(--text-muted);
}

.suggest-input {
  width: 100%;
  padding: 10px;
  border-radius: 8px;
  border: 1px solid var(--glass-border);
  background: var(--input-bg);
  color: var(--text-main);
  margin-bottom: 10px;
  outline: none;
}

.suggest-btn {
  width: 100%;
  padding: 10px;
  background: var(--primary-light);
  color: white;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 600;
  transition: background 0.3s;
}

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

/* History Breadcrumbs inside Tab */
.history-bar {
  display: flex;
  gap: 10px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.history-item {
  background: var(--primary-light);
  color: white;
  padding: 5px 15px;
  border-radius: 20px;
  font-size: 0.9rem;
  opacity: 0.8;
  display: flex;
  align-items: center;
  gap: 5px;
}

/* Responsive */
@media (max-width: 900px) {
  .app-container {
    flex-direction: column;
    height: auto;
    margin: 20px 0;
  }
  .main-content {
    min-height: 70vh;
  }
}