/* css/style.css */
.h-screen { height: 100vh; }
.w-full { width: 100%; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.hidden { display: none !important; }
.active { display: block; }
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-danger { color: #e74c3c; font-size: 0.875rem; }

/* Margins & Paddings */
.m-0 { margin: 0; }
.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mb-lg { margin-bottom: var(--spacing-lg); }

.p-md { padding: var(--spacing-md); }
.p-lg { padding: var(--spacing-lg); }
.p-xl { padding: var(--spacing-xl); }

/* Animations */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}
.animate-fade-in { animation: fadeIn 0.4s ease forwards; }

@keyframes scaleUp {
  from { opacity: 0; transform: scale(0.95); }
  to { opacity: 1; transform: scale(1); }
}
.animate-scale-up { animation: scaleUp 0.3s cubic-bezier(0.16, 1, 0.3, 1) forwards; }

/* Login Specific */
.login-card {
  width: 90%;
  max-width: 400px;
}
.glass-bg {
  background: radial-gradient(circle at top right, rgba(99, 102, 241, 0.1), transparent 40%),
              radial-gradient(circle at bottom left, rgba(236, 72, 153, 0.1), transparent 40%);
}

/* App Header */
.app-header {
  padding: var(--spacing-md);
  margin: var(--spacing-md);
  border-radius: var(--radius-md);
}
.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-sm);
}
.icon-btn {
  background: transparent;
  border: none;
  font-size: 1.25rem;
  cursor: pointer;
  padding: var(--spacing-xs);
  border-radius: var(--radius-full);
  transition: background var(--transition-fast);
  color: var(--text-main);
}
.icon-btn:hover { background: rgba(148, 163, 184, 0.2); }

.user-info {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.875rem;
}
.badge {
  background: rgba(99, 102, 241, 0.15);
  color: var(--color-primary);
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.75rem;
}

/* Calendar controls */
.controls {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-sm) var(--spacing-md);
  margin: 0 var(--spacing-md);
}
.btn-sm {
  padding: var(--spacing-xs) var(--spacing-sm);
  font-size: 0.875rem;
}
.week-label {
  font-size: 1rem;
  margin: 0;
}

/* Calendar Grid */
.calendar {
  margin: 0 var(--spacing-md);
  margin-bottom: 80px; /* space for bottom nav */
}
.day-card {
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-md);
}
.day-header {
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  border-bottom: 1px solid var(--border-color);
  padding-bottom: var(--spacing-xs);
  display: flex;
  justify-content: space-between;
}
.event-item {
  background: var(--bg-card-solid);
  border-left: 4px solid var(--color-primary);
  padding: var(--spacing-sm);
  margin-bottom: var(--spacing-sm);
  border-radius: 4px var(--radius-sm) var(--radius-sm) 4px;
  box-shadow: var(--shadow-sm);
}
.event-time { font-weight: 600; font-size: 0.9rem; }
.event-title { font-weight: 500; font-size: 0.95rem; }
.event-assignments { font-size: 0.8rem; color: var(--text-muted); margin-top: 4px; }
.assignment-badge {
    background: #f1f5f9;
    padding: 2px 6px;
    border-radius: 4px;
    margin-right: 4px;
    display: inline-block;
    margin-top: 2px;
}
[data-theme="dark"] .assignment-badge { background: #334155; }

/* Modals */
.modal-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
}
.modal-content {
  width: 90%;
  max-width: 500px;
  max-height: 90vh;
  overflow-y: auto;
  padding: var(--spacing-lg);
}
.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-md);
}