/* ===== BASE STYLES ===== */
:root {
  /* Light Mode */
  --bg-primary: #f0f2f5;
  --bg-glass: rgba(255, 255, 255, 0.25);
  --text-primary: #333;
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
  --border-glass: 1px solid rgba(255, 255, 255, 0.2);

  /* Dark Mode Overrides (activated via JS) */
  &[data-theme="dark"] {
    --bg-primary: #121212;
    --bg-glass: rgba(30, 30, 30, 0.5);
    --text-primary: #f0f0f0;
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
  }
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  transition: background 0.3s, color 0.2s;
}

body {
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: 'Segoe UI', sans-serif;
  min-height: 100vh;
  padding: 2rem;
}

/* ===== GLASSMORPHIC UI ===== */
.app-container {
  max-width: 1200px;
  margin: 0 auto;
}

.app-header, 
.note-card, 
.search-bar input {
  background: var(--bg-glass);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: var(--border-glass);
  box-shadow: var(--shadow);
  border-radius: 12px;
}

/* Header */
.app-header {
  padding: 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
}

#theme-toggle {
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  opacity: 0.8;
  &:hover { opacity: 1; }
}

/* Search Bar */
.search-bar {
  margin-bottom: 2rem;
}
#search-notes {
  width: 100%;
  padding: 1rem;
  font-size: 1rem;
  outline: none;
  &::placeholder { opacity: 0.6; }
}

/* Notes Grid */
.notes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}

.note-card {
  padding: 1.5rem;
  min-height: 200px;
  display: flex;
  flex-direction: column;
  &:hover { transform: translateY(-5px); }
}

.note-content {
  flex-grow: 1;
  outline: none;
  overflow-y: auto;
  padding-bottom: 1rem;
}

.delete-note {
  align-self: flex-end;
  background: none;
  border: none;
  cursor: pointer;
  opacity: 0.5;
  font-size: 1.2rem;
  &:hover { opacity: 1; color: red; }
}

/* Empty State */
.empty-state {
  grid-column: 1 / -1;
  text-align: center;
  padding: 4rem;
  opacity: 0.7;
}
#add-note {
  margin-top: 1rem;
  padding: 0.8rem 1.5rem;
  border-radius: 8px;
  border: none;
  background: #646cff;
  color: white;
  cursor: pointer;
  &:hover { background: #535bf2; }
}

/* Dialog */
#confirm-dialog {
  border: none;
  border-radius: 12px;
  padding: 2rem;
  max-width: 400px;
  &::backdrop {
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(2px);
  }
}
.dialog-actions {
  display: flex;
  justify-content: flex-end;
  gap: 1rem;
  margin-top: 1.5rem;
}
#confirm-delete { background: #ff4d4d; color: white; }