/* DYNAMIC LIGHT/DARK MODE TOKENS */
:root {
  --bg-color: #0a0a0a;
  --text-color: #f5f5f5;
  --accent-color: #6366f1;
  --sidebar-bg: #111111;
  --border-color: #333333;
  --card-bg: #1a1a1a;
  --input-bg: transparent;
  --hover-btn: #4f46e5;
  --danger-color: #ef4444;
  --success-color: #bef264;
}

[data-theme="light"] {
  --bg-color: #ffffff;
  --text-color: #111827;
  --sidebar-bg: #f9fafb;
  --border-color: #e5e7eb;
  --card-bg: #f3f4f6;
  --hover-btn: #4f46e5;
}

body, html { background-color: var(--bg-color); color: var(--text-color); margin: 0; font-family: -apple-system, sans-serif; height: 100%; transition: background-color 0.3s ease, color 0.3s ease;}
.quietnotes-app { display: flex; height: 100vh; overflow: hidden; width: 100%; }

/* Layout semantics */
.sidebar { width: 280px; background-color: var(--sidebar-bg); border-right: 1px solid var(--border-color); display: flex; flex-direction: column; transition: background-color 0.3s ease; }
.main-content { flex: 1; padding: 2rem 4rem; background-color: var(--bg-color); display: flex; flex-direction: column; overflow-y: auto; position: relative; transition: background-color 0.3s ease;}

/* Typography */
h1 { margin: 0; font-size: 1.8rem; font-weight: 600; color: var(--text-color);}
h2 { margin: 0 0 1rem 0; font-size: 1.2rem; font-weight: 400; color: #999; }

/* Buttons & Controls */
button { background-color: var(--accent-color); color: white; border: none; padding: 0.7rem 1.4rem; border-radius: 8px; cursor: pointer; font-size: 0.95rem; font-weight: 600; transition: all 0.2s; display: flex; align-items: center; gap: 8px; box-shadow: 0 4px 6px rgba(0,0,0,0.1);}
button:hover { opacity: 0.9; transform: translateY(-1px); }
.btn-secondary { background-color: var(--card-bg); color: var(--text-color); border: 1px solid var(--border-color); box-shadow: none;}

/* Interactive Lists & Checklists */
.checklist-item { display: flex; align-items: center; padding: 12px 15px; margin-bottom: 10px; background: var(--card-bg); border-radius: 8px; border: 1px solid var(--border-color); cursor: pointer; transition: all 0.2s;}
.checklist-item:hover { border-color: var(--accent-color); }
.checklist-item input { margin-right: 15px; transform: scale(1.3); cursor: pointer;}
.checklist-item.checked { opacity: 0.6; text-decoration: line-through; }

/* Cmd+K Search Modal */
.search-overlay { position: fixed; inset: 0; background: rgba(0,0,0,0.6); backdrop-filter: blur(5px); display: flex; justify-content: center; padding-top: 10vh; z-index: 1000; animation: fadeIn 0.2s;}
.search-modal { background: var(--card-bg); width: 600px; max-width: 90%; border-radius: 12px; box-shadow: 0 25px 50px -12px rgba(0,0,0,0.5); padding: 20px; border: 1px solid var(--border-color); display: flex; flex-direction: column; max-height: 80vh;}
.search-input { width: 100%; padding: 18px 20px; font-size: 1.4rem; border-radius: 8px; border: 1px solid var(--border-color); background: var(--bg-color); color: var(--text-color); outline: none; margin-bottom: 15px; box-sizing: border-box;}
.search-input:focus { border-color: var(--accent-color); box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);}
.search-result { padding: 15px; border-bottom: 1px solid var(--border-color); cursor: pointer; border-radius: 6px;}
.search-result:hover { background: var(--hover-btn); color: white;}

/* Badges for AI Tags */
.tag-badge { background: rgba(99, 102, 241, 0.15); color: #818cf8; padding: 4px 10px; border-radius: 12px; font-size: 0.8rem; font-weight: bold; border: 1px solid rgba(99, 102, 241, 0.5); text-transform: uppercase;}
[data-theme="light"] .tag-badge { background: rgba(99, 102, 241, 0.1); color: var(--accent-color); border: 1px solid var(--accent-color); }

@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }