:root {
  color-scheme: light dark;
  --font-sans: "Inter", "Segoe UI", system-ui, -apple-system, sans-serif;
  --background: #f6f7fb;
  --surface: #ffffff;
  --surface-2: #f1f3f8;
  --text: #101828;
  --muted: #6b7280;
  --border: #e2e8f0;
  --primary: #2563eb;
  --danger: #dc2626;
  --shadow: 0 14px 40px rgba(15, 23, 42, 0.12);
  --radius: 14px;
  --spacing: 16px;
}

html[data-theme="dark"] {
  --background: #0f1115;
  --surface: #171a21;
  --surface-2: #1f2430;
  --text: #e5e7eb;
  --muted: #9ca3af;
  --border: #2a3344;
  --primary: #60a5fa;
  --danger: #f87171;
  --shadow: 0 16px 40px rgba(0, 0, 0, 0.45);
}

html[data-theme="light"] {
  color-scheme: light;
}

html[data-theme="dark"] {
  color-scheme: dark;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  background: var(--background);
  color: var(--text);
  line-height: 1.5;
}

a {
  color: inherit;
  text-decoration: none;
}

a:hover {
  color: var(--primary);
}

img {
  max-width: 100%;
}

button,
input,
textarea,
select {
  font: inherit;
}

button {
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  padding: 10px 16px;
  border-radius: 10px;
  cursor: pointer;
  transition: border-color 150ms ease, background 150ms ease, box-shadow 150ms ease, transform 150ms ease;
}

button:hover {
  border-color: color-mix(in srgb, var(--primary) 40%, var(--border));
  box-shadow: 0 6px 18px rgba(37, 99, 235, 0.12);
}

button:active {
  transform: translateY(1px);
}

button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  box-shadow: none;
}

input,
textarea {
  width: 100%;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  transition: border-color 150ms ease, box-shadow 150ms ease;
}

input:focus-visible,
textarea:focus-visible,
button:focus-visible,
a:focus-visible {
  outline: 2px solid color-mix(in srgb, var(--primary) 60%, #fff);
  outline-offset: 2px;
}

textarea {
  resize: vertical;
}

.status {
  margin-top: 6px;
  font-size: 0.9rem;
  color: var(--muted);
}

.status.error {
  color: var(--danger);
}

#app-shell[hidden] {
  display: none;
}

.app-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: color-mix(in srgb, var(--surface) 88%, transparent);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(12px);
}

.app-header__inner {
  max-width: 960px;
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.app-brand {
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: 0.2px;
}

#nav {
  display: flex;
  gap: 14px;
  align-items: center;
  margin: 0;
}

#nav a {
  padding: 6px 10px;
  border-radius: 8px;
  color: var(--muted);
  transition: background 150ms ease, color 150ms ease;
}

#nav a:hover,
#nav a:focus-visible {
  color: var(--text);
  background: var(--surface-2);
}

.theme-toggle {
  border-radius: 999px;
  padding: 8px 14px;
  border-color: color-mix(in srgb, var(--border) 60%, transparent);
}

.app-main {
  max-width: 960px;
  margin: 0 auto;
  padding: 24px;
  display: grid;
  gap: 24px;
}

.page-title {
  margin: 0 0 12px;
  font-size: 1.4rem;
}

.card,
.note-card,
.project-group {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 16px;
}

.note-card h4,
.project-title {
  margin: 0 0 8px;
}

.note-meta {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin: 8px 0 12px;
}

.note-meta label {
  display: flex;
  flex-direction: column;
  font-size: 0.9rem;
  flex: 1 1 180px;
  color: var(--muted);
}

.note-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 10px;
}

.note-summary {
  margin-top: 8px;
  background: var(--surface-2);
  padding: 10px 12px;
  border-radius: 10px;
  white-space: pre-line;
  color: var(--muted);
  font-size: 0.95rem;
}

#chat {
  height: 360px;
  overflow-y: auto;
  padding: 16px;
  background: var(--surface);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 12px;
  box-shadow: var(--shadow);
}

.msg {
  display: flex;
  flex-direction: column;
  gap: 4px;
  align-items: flex-start;
}

.msg-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.msg-label.user {
  align-self: flex-end;
}

.msg-label.assistant {
  align-self: flex-start;
}

.msg-body {
  white-space: pre-line;
  padding: 10px 14px;
  border-radius: 14px;
  background: var(--surface-2);
  color: var(--text);
  max-width: min(480px, 90%);
  box-shadow: 0 8px 20px rgba(15, 23, 42, 0.08);
}

.msg-label.user + .msg-body {
  align-self: flex-end;
  background: color-mix(in srgb, var(--primary) 16%, var(--surface-2));
}

.msg-label.assistant + .msg-body {
  align-self: flex-start;
}

#controls {
  display: flex;
  gap: 12px;
  align-items: center;
}

#input {
  flex: 1;
}

.field-row {
  margin: 10px 0;
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.field-row input {
  flex: 1 1 180px;
}

#notes-manager,
#ingest {
  display: grid;
  gap: 16px;
}

#notes-manager button,
#ingest button {
  align-self: flex-start;
}

#secret-gate {
  max-width: 420px;
  margin: 80px auto;
  padding: 24px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  text-align: center;
}

#secret-gate p {
  color: var(--muted);
}

#secret-gate button {
  margin-top: 12px;
}

#notes-list {
  display: grid;
  gap: 12px;
}

#tasks-container {
  display: grid;
  gap: 16px;
}

.project-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  margin: 8px 0 10px;
}

.project-actions label {
  font-weight: 600;
}

.project-actions input {
  min-width: 220px;
}

.task {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px dashed var(--border);
}

.task:first-of-type {
  border-top: none;
  padding-top: 0;
  margin-top: 8px;
}

.task-meta {
  font-size: 0.9rem;
  color: var(--muted);
  margin-top: 4px;
}

.task-actions {
  margin-top: 8px;
}

@media (max-width: 720px) {
  .app-header__inner,
  .app-main {
    padding: 16px;
  }

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

  #controls button {
    width: 100%;
  }
}