/* ─── CSS Custom Properties ──────────────────────────────────────────────── */
:root {
  --color-bg: #f4f6f9;
  --color-surface: #ffffff;
  --color-border: #e2e8f0;
  --color-text: #1e293b;
  --color-text-muted: #64748b;
  --color-primary: #6366f1;
  --color-primary-hover: #4f46e5;
  --color-danger: #ef4444;
  --color-danger-hover: #dc2626;
  --color-secondary: #94a3b8;
  --color-secondary-hover: #64748b;

  /* Mood badge colors */
  --mood-happy: #fef08a;
  --mood-happy-text: #713f12;
  --mood-sad: #bfdbfe;
  --mood-sad-text: #1e3a5f;
  --mood-motivated: #d8b4fe;
  --mood-motivated-text: #4c1d95;
  --mood-stressed: #fecaca;
  --mood-stressed-text: #7f1d1d;
  --mood-calm: #bbf7d0;
  --mood-calm-text: #14532d;

  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.08), 0 4px 12px rgba(0, 0, 0, 0.06);
  --shadow-hover: 0 4px 12px rgba(0, 0, 0, 0.12), 0 8px 24px rgba(0, 0, 0, 0.08);
  --transition: 0.2s ease;
  --sidebar-width: 360px;
}

/* ─── Reset & Base ────────────────────────────────────────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
}

/* ─── Screen-reader Only ──────────────────────────────────────────────────── */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ─── Layout ──────────────────────────────────────────────────────────────── */
.app-layout {
  display: flex;
  min-height: 100vh;
}

/* ─── Sidebar ─────────────────────────────────────────────────────────────── */
.sidebar {
  width: var(--sidebar-width);
  flex-shrink: 0;
  background: var(--color-surface);
  border-right: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  height: 100vh;
  position: sticky;
  top: 0;
  overflow-y: auto;
  padding: 2rem 1.5rem;
  gap: 1.5rem;
}

.sidebar-header {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.app-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.02em;
}

.app-subtitle {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

/* ─── Form ────────────────────────────────────────────────────────────────── */
.entry-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

.form-group label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.625rem 0.875rem;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.9375rem;
  font-family: inherit;
  color: var(--color-text);
  background: var(--color-bg);
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
  background: var(--color-surface);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.form-group select {
  cursor: pointer;
}

.form-error {
  font-size: 0.875rem;
  color: var(--color-danger);
  background: #fef2f2;
  border: 1px solid #fecaca;
  border-radius: var(--radius-sm);
  padding: 0.5rem 0.75rem;
}

.form-actions {
  display: flex;
  gap: 0.75rem;
}

/* ─── Buttons ─────────────────────────────────────────────────────────────── */
.btn {
  padding: 0.625rem 1.25rem;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 0.9375rem;
  font-weight: 600;
  cursor: pointer;
  transition: background-color var(--transition), transform var(--transition), box-shadow var(--transition);
  font-family: inherit;
}

.btn:active {
  transform: scale(0.98);
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
  flex: 1;
}

.btn-primary:hover {
  background: var(--color-primary-hover);
  box-shadow: 0 2px 8px rgba(99, 102, 241, 0.35);
}

.btn-secondary {
  background: var(--color-bg);
  color: var(--color-text-muted);
  border: 1.5px solid var(--color-border);
}

.btn-secondary:hover {
  background: var(--color-border);
  color: var(--color-text);
}

.btn-edit {
  background: transparent;
  color: var(--color-primary);
  border: 1.5px solid var(--color-primary);
  padding: 0.375rem 0.75rem;
  font-size: 0.8125rem;
  border-radius: var(--radius-sm);
}

.btn-edit:hover {
  background: var(--color-primary);
  color: #fff;
}

.btn-delete {
  background: transparent;
  color: var(--color-danger);
  border: 1.5px solid var(--color-danger);
  padding: 0.375rem 0.75rem;
  font-size: 0.8125rem;
  border-radius: var(--radius-sm);
}

.btn-delete:hover {
  background: var(--color-danger);
  color: #fff;
}

.hidden {
  display: none !important;
}

/* ─── Main Content ────────────────────────────────────────────────────────── */
.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: 2rem;
  gap: 1.5rem;
  min-width: 0;
}

/* ─── Controls Bar ────────────────────────────────────────────────────────── */
.controls-bar {
  display: flex;
  gap: 1rem;
  align-items: center;
  flex-wrap: wrap;
}

.search-wrapper {
  flex: 1;
  min-width: 180px;
}

.search-wrapper input {
  width: 100%;
  padding: 0.625rem 0.875rem;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.9375rem;
  font-family: inherit;
  background: var(--color-surface);
  color: var(--color-text);
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.search-wrapper input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}

.filter-wrapper select {
  padding: 0.625rem 0.875rem;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.9375rem;
  font-family: inherit;
  background: var(--color-surface);
  color: var(--color-text);
  cursor: pointer;
  outline: none;
  transition: border-color var(--transition);
}

.filter-wrapper select:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}

.entry-count {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  white-space: nowrap;
  font-weight: 500;
}

/* ─── Entry Cards Grid ────────────────────────────────────────────────────── */
.entries-container {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.25rem;
  align-content: start;
}

/* ─── Entry Card ──────────────────────────────────────────────────────────── */
.entry-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  box-shadow: var(--shadow);
  transition: transform var(--transition), box-shadow var(--transition);
}

.entry-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}

.entry-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 0.75rem;
}

.entry-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.01em;
  flex: 1;
  min-width: 0;
  overflow-wrap: break-word;
}

/* ─── Mood Badges ─────────────────────────────────────────────────────────── */
.mood-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.25rem 0.625rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
  white-space: nowrap;
  flex-shrink: 0;
}

.mood-happy     { background: var(--mood-happy);     color: var(--mood-happy-text); }
.mood-sad       { background: var(--mood-sad);       color: var(--mood-sad-text); }
.mood-motivated { background: var(--mood-motivated); color: var(--mood-motivated-text); }
.mood-stressed  { background: var(--mood-stressed);  color: var(--mood-stressed-text); }
.mood-calm      { background: var(--mood-calm);      color: var(--mood-calm-text); }

/* ─── Entry Content ───────────────────────────────────────────────────────── */
.entry-content {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  overflow-wrap: break-word;
  flex: 1;
  /* Clamp to 4 lines */
  display: -webkit-box;
  -webkit-line-clamp: 4;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ─── Entry Footer ────────────────────────────────────────────────────────── */
.entry-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.entry-date {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.entry-actions {
  display: flex;
  gap: 0.5rem;
}

/* ─── Empty State ─────────────────────────────────────────────────────────── */
.empty-state {
  grid-column: 1 / -1;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 4rem 2rem;
  text-align: center;
  color: var(--color-text-muted);
  font-size: 1rem;
  border: 2px dashed var(--color-border);
  border-radius: var(--radius);
  background: var(--color-surface);
}

/* ─── Responsive ──────────────────────────────────────────────────────────── */
@media (max-width: 768px) {
  .app-layout {
    flex-direction: column;
  }

  .sidebar {
    width: 100%;
    height: auto;
    position: static;
    padding: 1.5rem 1rem;
    border-right: none;
    border-bottom: 1px solid var(--color-border);
  }

  .main-content {
    padding: 1rem;
  }

  .controls-bar {
    flex-direction: column;
    align-items: stretch;
  }

  .search-wrapper {
    min-width: 0;
  }

  .entry-count {
    text-align: right;
  }

  .entries-container {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .app-title {
    font-size: 1.25rem;
  }

  .form-actions {
    flex-direction: column;
  }

  .btn-primary {
    flex: none;
  }
}