:root {
  --font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --bg-color: #f8fafc;
  --card-bg: #ffffff;
  --text-main: #0f172a;
  --text-muted: #64748b;
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --border-color: #e2e8f0;
  --tag-bg: #e0e7ff;
  --tag-text: #3730a3;
  --pinned-border: #f59e0b;
  --star-color: #eab308;
  --radius: 10px;
}

[data-theme="dark"] {
  --bg-color: #0b1120;
  --card-bg: #1e293b;
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --primary: #3b82f6;
  --primary-hover: #60a5fa;
  --border-color: #334155;
  --tag-bg: #312e81;
  --tag-text: #c7d2fe;
  --pinned-border: #f59e0b;
  --star-color: #facc15;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  user-select: none;
}
input, textarea {
  user-select: text !important;
}

body {
  font-family: var(--font-family);
  background-color: var(--bg-color);
  color: var(--text-main);
  line-height: 1.5;
  padding: 2rem 1rem;
  transition: background-color 0.2s, color 0.2s;
}

.container {
  max-width: 800px;
  margin: 0 auto;
}

.greeting-bar {
  margin-bottom: 0.5rem;
  font-weight: 600;
  color: var(--primary);
  font-size: 0.95rem;
}

/* Security Lock & Modals */
.lock-overlay, .modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(11, 17, 32, 0.92);
  backdrop-filter: blur(8px);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 9999;
  padding: 1rem;
}

.modal-overlay.hidden {
  display: none;
}

.lock-card, .modal-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 2.5rem 2rem;
  text-align: center;
  max-width: 420px;
  width: 100%;
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.4);
}

.lock-card h2, .modal-card h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.lock-card p, .modal-card p {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 1.75rem;
  line-height: 1.5;
}

.lock-card form, .modal-card form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.lock-card input, .modal-card input {
  text-align: center;
  letter-spacing: 0.25rem;
  font-size: 1.1rem;
  padding: 0.8rem 1rem;
  margin-bottom: 0;
}

.lock-card .btn-primary, .modal-card .btn-primary {
  padding: 0.85rem 1.25rem;
  font-size: 0.95rem;
}

.modal-icon { font-size: 2.2rem; margin-bottom: 0.75rem; }
.modal-icon.brand { color: var(--pinned-border); }

.modal-actions { display: flex; gap: 0.75rem; margin-top: 1.25rem; }
.modal-actions.space-between { justify-content: space-between; }

/* Detail Card Modal */
.detail-card { text-align: left; max-width: 550px; }
.modal-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 1rem; }
.btn-close { background: none; border: none; color: var(--text-muted); font-size: 1.2rem; cursor: pointer; }
.detail-img { width: 100%; max-height: 250px; object-fit: cover; border-radius: var(--radius); margin-bottom: 1rem; }
.detail-content { white-space: pre-wrap; margin: 1rem 0; line-height: 1.6; font-size: 1rem; user-select: text; }
.detail-date { font-size: 0.8rem; color: var(--text-muted); }

/* Source Link Button */
.source-link-container { margin: 0.75rem 0; }
.source-link-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--tag-bg);
  color: var(--tag-text);
  padding: 0.5rem 0.85rem;
  border-radius: calc(var(--radius) - 2px);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 600;
}

/* Stats Widget */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.stat-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 1rem;
  display: flex;
  align-items: center;
  gap: 1rem;
}

.stat-card i { font-size: 1.5rem; color: var(--primary); }
.stat-card span { font-size: 1.25rem; font-weight: 700; }
.stat-card p { font-size: 0.75rem; color: var(--text-muted); }

/* Category Filter Pills */
.filter-pills {
  display: flex;
  gap: 0.5rem;
  overflow-x: auto;
  padding-bottom: 0.75rem;
  margin-bottom: 1rem;
}

.pill {
  background: var(--card-bg);
  color: var(--text-muted);
  border: 1px solid var(--border-color);
  padding: 0.35rem 0.8rem;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.2s;
}

.pill:hover, .pill.active {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
}

/* Header & Inputs */
header { margin-bottom: 2rem; }
.header-top { display: flex; justify-content: space-between; align-items: center; margin-bottom: 0.5rem; }
.header-actions { display: flex; gap: 0.5rem; flex-wrap: wrap; }
header h1 { font-size: 1.75rem; font-weight: 700; display: flex; align-items: center; gap: 0.5rem; }
.brand-icon { color: var(--pinned-border); }

.card {
  background: var(--card-bg);
  padding: 1.5rem;
  border-radius: var(--radius);
  border: 1px solid var(--border-color);
  margin-bottom: 2rem;
}

.form-group { margin-bottom: 1rem; text-align: left; }
label { display: flex; align-items: center; gap: 0.4rem; font-size: 0.875rem; font-weight: 600; margin-bottom: 0.4rem; }

input, select, textarea {
  width: 100%;
  padding: 0.65rem 0.8rem;
  background-color: var(--card-bg);
  color: var(--text-main);
  border: 1px solid var(--border-color);
  border-radius: calc(var(--radius) - 2px);
  font-size: 0.95rem;
  outline: none;
  font-family: inherit;
}

.btn-primary {
  background-color: var(--primary);
  color: white;
  border: none;
  padding: 0.75rem 1.25rem;
  border-radius: calc(var(--radius) - 2px);
  font-weight: 600;
  cursor: pointer;
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.5rem;
}

.btn-secondary {
  background: transparent;
  color: var(--text-main);
  border: 1px solid var(--border-color);
  padding: 0.45rem 0.85rem;
  border-radius: calc(var(--radius) - 2px);
  cursor: pointer;
  font-size: 0.875rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

/* Notes Cards */
.notes-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 1rem; gap: 1rem; flex-wrap: wrap; }
.notes-header .actions { display: flex; gap: 0.5rem; align-items: center; }

.search-wrapper { position: relative; display: flex; align-items: center; }
.search-wrapper .search-icon { position: absolute; left: 0.75rem; color: var(--text-muted); }
.search-wrapper input { padding-left: 2.2rem; width: 200px; text-align: left; letter-spacing: normal; }

.notes-grid { display: grid; gap: 1rem; }
.note-card {
  background: var(--card-bg);
  padding: 1.25rem;
  border-radius: var(--radius);
  border: 1px solid var(--border-color);
  cursor: pointer;
  transition: transform 0.15s ease;
}
.note-card:hover { transform: translateY(-2px); }
.note-card.pinned { border: 2px solid var(--pinned-border); }

.note-card-img {
  width: 100%;
  max-height: 200px;
  object-fit: cover;
  border-radius: calc(var(--radius) - 4px);
  margin-bottom: 0.75rem;
}

.note-meta { display: flex; justify-content: space-between; align-items: center; margin-bottom: 0.5rem; }
.speaker { font-weight: 700; display: flex; align-items: center; gap: 0.4rem; }
.category-tag { background: var(--tag-bg); color: var(--tag-text); font-size: 0.75rem; padding: 0.25rem 0.6rem; border-radius: 12px; font-weight: 600; }

.note-content { margin-bottom: 0.75rem; white-space: pre-wrap; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.note-footer { display: flex; justify-content: space-between; align-items: center; font-size: 0.75rem; color: var(--text-muted); }

.footer-btn-group { display: flex; gap: 0.75rem; align-items: center; }
.btn-star { background: none; border: none; color: var(--text-muted); cursor: pointer; font-size: 0.9rem; }
.btn-star.is-starred { color: var(--star-color); }
.btn-pin { background: none; border: none; color: var(--text-muted); cursor: pointer; }
.btn-pin.is-pinned { color: var(--pinned-border); }
.btn-delete { background: none; border: none; color: #ef4444; cursor: pointer; }

/* Toast Notifications */
.toast {
  position: fixed;
  top: 1.5rem;
  right: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.85rem 1.25rem;
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-weight: 600;
  z-index: 10000;
  transition: all 0.3s ease;
}

.toast.hidden { opacity: 0; transform: translateY(-20px); pointer-events: none; }
.toast.success { background-color: #064e3b; color: #a7f3d0; border: 1px solid #059669; }
.toast.error { background-color: #450a0a; color: #fecaca; border: 1px solid #dc2626; }

/* Footer */
footer { margin-top: 3rem; padding-top: 1.5rem; border-top: 1px solid var(--border-color); text-align: center; color: var(--text-muted); }
.heart-icon { color: #ef4444; }

.hidden { display: none !important; }

@media (max-width: 600px) {
  .header-top, .notes-header { flex-direction: column; align-items: stretch; gap: 0.75rem; }
  .search-wrapper input { width: 100%; }
}