/* ---- Theme tokens ---- */
:root {
  --bg: #f4f6fb;
  --sidebar-bg: #1f2430;
  --sidebar-text: #e6e9f0;
  --sidebar-muted: #9aa3b2;
  --panel: #ffffff;
  --text: #1f2430;
  --muted: #6b7280;
  --accent: #5b8def;
  --accent-dark: #3f6fd1;
  --danger: #e05260;
  --border: #e3e7ef;
  --active: #2b3140;
  --radius: 10px;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #12151c;
    --panel: #1b1f29;
    --text: #e6e9f0;
    --muted: #8b93a3;
    --border: #2a2f3b;
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
}

.app {
  display: grid;
  grid-template-columns: 300px 1fr;
  height: 100vh;
}

/* ---- Sidebar ---- */
.sidebar {
  background: var(--sidebar-bg);
  color: var(--sidebar-text);
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.sidebar-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 16px 12px;
}

.sidebar-head h1 {
  font-size: 18px;
  margin: 0;
  letter-spacing: 0.2px;
}

.head-actions {
  display: flex;
  align-items: center;
  gap: 6px;
}

.icon-btn {
  padding: 6px 9px;
  line-height: 1;
  background: rgba(255, 255, 255, 0.08);
  color: var(--sidebar-text);
  border: 1px solid transparent;
}
.icon-btn:hover { background: rgba(255, 255, 255, 0.16); }

.search-wrap { padding: 0 16px 12px; }

.search-wrap input {
  width: 100%;
  padding: 9px 11px;
  border-radius: var(--radius);
  border: 1px solid transparent;
  background: rgba(255, 255, 255, 0.08);
  color: var(--sidebar-text);
  font-size: 14px;
}

.search-wrap input::placeholder { color: var(--sidebar-muted); }
.search-wrap input:focus { outline: none; border-color: var(--accent); }

.page-list {
  flex: 1;
  overflow-y: auto;
  padding: 4px 8px 8px;
}

.page-item {
  padding: 10px 12px;
  border-radius: var(--radius);
  cursor: pointer;
  margin-bottom: 2px;
  border: none;
  background: transparent;
  color: var(--sidebar-text);
  width: 100%;
  text-align: left;
  display: block;
}

.page-item:hover { background: rgba(255, 255, 255, 0.06); }
.page-item.active { background: var(--active); }

.page-item .pi-date { font-size: 14px; font-weight: 600; }
.page-item .pi-preview {
  font-size: 12px;
  color: var(--sidebar-muted);
  margin-top: 2px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.month-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  color: var(--sidebar-muted);
  padding: 12px 12px 4px;
}

.sidebar-foot {
  padding: 10px 16px;
  font-size: 12px;
  color: var(--sidebar-muted);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

/* ---- Main page ---- */
.page {
  padding: 28px 36px;
  overflow-y: auto;
  min-height: 0;
}

.page-view { max-width: 760px; margin: 0 auto; }

.page-toolbar {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 18px;
}

.spacer { flex: 1; }

.date-picker {
  padding: 7px 10px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  font-size: 14px;
}

.page-heading {
  font-size: 26px;
  margin: 0 0 14px;
}

.mood-input {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--panel);
  color: var(--text);
  font-size: 14px;
  margin-bottom: 14px;
}

/* ---- Prompt helper ---- */
.prompt-bar { margin-bottom: 14px; }

.prompt-box {
  margin-top: 10px;
  padding: 14px 16px;
  border: 1px solid var(--accent);
  border-left: 4px solid var(--accent);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--accent) 8%, var(--panel));
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.prompt-text {
  font-size: 16px;
  line-height: 1.5;
  font-style: italic;
}

.prompt-actions {
  display: flex;
  gap: 8px;
}

.btn-sm {
  padding: 5px 10px;
  font-size: 13px;
}

.editor {
  width: 100%;
  min-height: 55vh;
  padding: 18px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--panel);
  color: var(--text);
  font-size: 16px;
  line-height: 1.6;
  resize: vertical;
  box-shadow: var(--shadow);
}

.editor:focus, .mood-input:focus, .date-picker:focus {
  outline: none;
  border-color: var(--accent);
}

.save-status {
  font-size: 13px;
  color: var(--muted);
}

/* ---- Buttons ---- */
.btn {
  border: none;
  border-radius: var(--radius);
  padding: 8px 14px;
  font-size: 14px;
  cursor: pointer;
  background: var(--panel);
  color: var(--text);
  border: 1px solid var(--border);
}

.btn:hover { filter: brightness(0.97); }

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

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

/* ---- Empty state ---- */
.empty-state {
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 14px;
  color: var(--muted);
}

.hidden { display: none !important; }

/* ---- Settings modal ---- */
.overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.45);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  z-index: 50;
}

.modal {
  background: var(--panel);
  color: var(--text);
  width: 100%;
  max-width: 380px;
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.25);
}

.modal-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.modal-head h2 { font-size: 18px; margin: 0; }

.modal-head .icon-btn {
  background: transparent;
  color: var(--muted);
  border-color: var(--border);
}
.modal-head .icon-btn:hover { background: var(--bg); }

.setting-row {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 4px 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
}

.setting-row label { font-size: 15px; font-weight: 600; }

.setting-hint {
  grid-column: 1;
  font-size: 12px;
  color: var(--muted);
}

.setting-row input[type="color"] {
  grid-column: 2;
  grid-row: 1 / span 2;
  width: 48px;
  height: 40px;
  padding: 2px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--panel);
  cursor: pointer;
}

.modal-foot {
  margin-top: 18px;
  display: flex;
  justify-content: flex-end;
}

/* ---- Mobile ---- */
@media (max-width: 720px) {
  .app { grid-template-columns: 1fr; }
  .sidebar { height: auto; max-height: 42vh; }
  .page { padding: 20px 16px; }
}