* { box-sizing: border-box; }
:root {
  --bg: #f7f7f5;
  --panel: #ffffff;
  --border: #e2e0dc;
  --text: #1f1e1c;
  --muted: #7a766f;
  --accent: #b3562e;
}
body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
}
button {
  font: inherit;
  padding: 6px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--panel);
  cursor: pointer;
}
button:hover { border-color: var(--accent); color: var(--accent); }

/* brand wordmark: "Notes" with a smaller "by Optiq Labs" */
.brand { display: flex; align-items: baseline; gap: 6px; flex-wrap: wrap; }
.brand-sub { font-size: 0.62em; font-weight: 500; opacity: 0.72; letter-spacing: 0.01em; white-space: nowrap; }
.brand-sub a { color: inherit; }
button.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
button.primary:hover { opacity: 0.9; color: #fff; }
input[type="text"], textarea {
  font: inherit;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 8px 10px;
  background: var(--panel);
  color: var(--text);
}

/* editor layout */
.app { display: grid; grid-template-columns: 260px 1fr 1fr; height: 100vh; height: 100dvh; }
.mobile-nav { display: none; }
.sidebar {
  border-right: 1px solid var(--border);
  background: var(--panel);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.sidebar header {
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.sidebar h1 { font-size: 15px; margin: 0; }
.doc-list { overflow-y: auto; flex: 1; margin: 0; padding: 0; list-style: none; }
.doc-list li {
  padding: 10px 16px;
  border-bottom: 1px solid var(--border);
  cursor: pointer;
}
.doc-list li:hover { background: var(--bg); }
.doc-list li.active { background: var(--bg); border-left: 3px solid var(--accent); padding-left: 13px; }
.doc-list .title { display: block; font-weight: 600; font-size: 14px; }
.doc-list .meta { font-size: 12px; color: var(--muted); }
.sidebar .assets-section { border-top: 1px solid var(--border); max-height: 40%; display: flex; flex-direction: column; }
.sidebar .assets-section h2 { font-size: 13px; margin: 0; padding: 10px 16px 4px; color: var(--muted); }
.asset-list { overflow-y: auto; margin: 0; padding: 0 0 8px; list-style: none; font-size: 13px; }
.asset-list li { display: flex; gap: 6px; align-items: center; padding: 4px 16px; }
.asset-list .name { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.asset-list button { padding: 1px 7px; font-size: 12px; }

.editor-pane, .preview-pane { display: flex; flex-direction: column; overflow: hidden; }
.editor-pane { border-right: 1px solid var(--border); }
.pane-header {
  display: flex;
  gap: 8px;
  align-items: center;
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  background: var(--panel);
}
.pane-header input[type="text"] { flex: 1; }
#content {
  flex: 1;
  border: 0;
  border-radius: 0;
  resize: none;
  padding: 16px;
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 13.5px;
  line-height: 1.55;
  outline: none;
}
.preview-pane .pane-header { justify-content: space-between; }
#status { font-size: 12px; color: var(--muted); }
.empty-state {
  margin: auto;
  color: var(--muted);
  text-align: center;
  padding: 40px;
}

/* narrower desktops: slimmer sidebar */
@media (max-width: 1150px) {
  .app { grid-template-columns: 210px 1fr 1fr; }
}

/* phones & small tablets: one pane at a time + bottom tab bar */
@media (max-width: 900px) {
  .app { display: flex; flex-direction: column; }
  .sidebar, .editor-pane, .preview-pane {
    display: none;
    flex: 1;
    min-height: 0;
    border-right: 0;
  }
  .sidebar { width: 100%; }
  body[data-view="docs"] .sidebar { display: flex; }
  body[data-view="edit"] .editor-pane { display: flex; }
  body[data-view="preview"] .preview-pane { display: flex; }

  .mobile-nav {
    display: flex;
    border-top: 1px solid var(--border);
    background: var(--panel);
    padding-bottom: env(safe-area-inset-bottom);
  }
  .mobile-nav button {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 3px;
    padding: 9px 4px 7px;
    border: 0;
    border-radius: 0;
    background: transparent;
    font-size: 11.5px;
    color: var(--muted);
  }
  .mobile-nav button.active { color: var(--accent); }
  .mobile-nav button:hover { color: var(--accent); }

  /* touch-friendly sizing; 16px inputs stop iOS zoom-on-focus */
  button { padding: 8px 14px; }
  input[type="text"], textarea { font-size: 16px; }
  #content { font-size: 16px; padding: 14px; }
  .pane-header { flex-wrap: wrap; gap: 6px; padding: 8px 10px; }
  .pane-header input[type="text"] { flex: 1 1 100%; }
  .rendered { padding: 18px 16px; }
  .doc-list li { padding: 13px 16px; }
  .doc-list li.active { padding-left: 13px; }
  .asset-list li { padding: 7px 16px; }
  .sidebar .assets-section { max-height: 32%; }
}

/* rendered document */
.rendered { flex: 1; overflow-y: auto; padding: 24px 32px; background: var(--panel); }
.rendered img { max-width: 100%; }
.rendered pre {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px;
  overflow-x: auto;
}
.rendered code { font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace; font-size: 0.9em; }
.rendered table { border-collapse: collapse; display: block; overflow-x: auto; max-width: 100%; width: fit-content; }
.rendered th, .rendered td { border: 1px solid var(--border); padding: 6px 12px; }
.rendered img { height: auto; }
.rendered { overflow-wrap: break-word; }
.rendered blockquote {
  margin: 0;
  padding: 2px 16px;
  border-left: 3px solid var(--accent);
  color: var(--muted);
}
.diagram { margin: 16px 0; overflow-x: auto; }
.diagram svg { max-width: 100%; height: auto; }
.diagram-error {
  color: #a33;
  background: #fdf1f0;
  border: 1px solid #eccfcc;
  border-radius: 8px;
  padding: 10px 14px;
  font-size: 13px;
  white-space: pre-wrap;
}

/* login portal */
.login-body {
  display: grid;
  place-items: center;
  min-height: 100vh;
  padding: 24px;
  background:
    radial-gradient(600px 400px at 15% 10%, rgba(179, 86, 46, 0.10), transparent 60%),
    radial-gradient(700px 500px at 90% 90%, rgba(179, 86, 46, 0.08), transparent 60%),
    var(--bg);
}
.login-card {
  display: grid;
  grid-template-columns: 300px 1fr;
  width: min(760px, 100%);
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 18px 50px -18px rgba(31, 30, 28, 0.25), 0 2px 8px rgba(31, 30, 28, 0.05);
}
.login-brand {
  background: linear-gradient(160deg, var(--accent), #7e3a1c);
  color: #fff;
  padding: 36px 30px;
  display: flex;
  flex-direction: column;
}
.login-logo {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.16);
  display: grid;
  place-items: center;
  margin-bottom: 18px;
}
.login-brand h2 { margin: 0 0 4px; font-size: 21px; }
.login-brand p { margin: 0 0 22px; opacity: 0.85; font-size: 14px; }
.login-features { list-style: none; margin: auto 0 0; padding: 0; display: grid; gap: 10px; }
.login-features li {
  font-size: 13.5px;
  opacity: 0.92;
  padding-left: 24px;
  position: relative;
}
.brand-site {
  margin-top: 18px;
  color: rgba(255, 255, 255, 0.75);
  font-size: 12.5px;
  text-decoration: none;
}
.brand-site:hover { color: #fff; text-decoration: underline; }
.login-features li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 2px;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.22);
  background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="white" stroke-width="3.4" stroke-linecap="round" stroke-linejoin="round"><path d="M5 13l4 4 10-11"/></svg>');
  background-size: 9px;
  background-position: center;
  background-repeat: no-repeat;
}
.login-form-panel { padding: 36px 38px; }
.login-form-panel h1 { margin: 20px 0 4px; font-size: 22px; }
.login-sub { margin: 0 0 22px; color: var(--muted); font-size: 13.5px; }
.login-tabs {
  display: flex;
  gap: 4px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 9px;
  padding: 4px;
  width: fit-content;
}
.login-tabs button { border: 0; background: transparent; padding: 6px 16px; border-radius: 6px; color: var(--muted); }
.login-tabs button:hover { color: var(--accent); }
.login-tabs button.active { background: var(--panel); color: var(--text); box-shadow: 0 1px 3px rgba(31, 30, 28, 0.12); }
.login-form-panel form { display: flex; flex-direction: column; gap: 16px; }
.field { display: flex; flex-direction: column; gap: 6px; }
.field label { font-size: 13px; font-weight: 600; }
.field input { width: 100%; padding: 10px 12px; }
.field input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(179, 86, 46, 0.15); }
.field input.invalid { border-color: #c0453a; }
.field input.invalid:focus { box-shadow: 0 0 0 3px rgba(192, 69, 58, 0.15); }
.field-hint { font-size: 12px; color: var(--muted); }
.field-error { font-size: 12.5px; color: #a33; min-height: 0; }
.field-error:empty { display: none; }
.password-wrap { position: relative; }
.password-wrap input { padding-right: 42px; }
.toggle-password {
  position: absolute;
  right: 6px;
  top: 50%;
  transform: translateY(-50%);
  border: 0;
  background: transparent;
  padding: 6px;
  color: var(--muted);
  display: grid;
  place-items: center;
}
.toggle-password:hover { color: var(--accent); }
.toggle-password svg[hidden] { display: none; }
.auth-error {
  color: #a33;
  background: #fdf1f0;
  border: 1px solid #eccfcc;
  border-radius: 8px;
  padding: 9px 12px;
  font-size: 13px;
}
.login-submit {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px;
  font-weight: 600;
  border-radius: 8px;
}
.login-submit:disabled { opacity: 0.75; cursor: default; }
.spinner {
  width: 14px;
  height: 14px;
  border: 2px solid rgba(255, 255, 255, 0.4);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.login-switch { margin: 18px 0 0; font-size: 13px; color: var(--muted); }
.login-switch a { color: var(--accent); font-weight: 600; text-decoration: none; }
.login-switch a:hover { text-decoration: underline; }
@media (max-width: 640px) {
  .login-card { grid-template-columns: 1fr; }
  .login-brand { padding: 26px 30px; }
  .login-features { display: none; }
  .login-form-panel { padding: 28px 26px; }
}

/* OAuth consent screen */
.consent-card {
  width: min(430px, 100%);
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 34px 36px;
  box-shadow: 0 18px 50px -18px rgba(31, 30, 28, 0.25), 0 2px 8px rgba(31, 30, 28, 0.05);
}
.consent-logo { background: var(--accent); color: #fff; margin-bottom: 12px; }
.consent-brand { font-size: 15px; font-weight: 700; margin-bottom: 14px; color: var(--muted); }
.consent-card h1 { font-size: 19px; margin: 0 0 6px; font-weight: 500; line-height: 1.4; }
.consent-sub { margin: 0 0 18px; color: var(--muted); font-size: 13.5px; }
.consent-scopes {
  list-style: none;
  margin: 0 0 22px;
  padding: 14px 16px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  display: grid;
  gap: 8px;
}
.consent-scopes li { font-size: 13.5px; padding-left: 22px; position: relative; }
.consent-scopes li::before { content: "✓"; position: absolute; left: 2px; color: var(--accent); font-weight: 700; }
.consent-actions { display: flex; gap: 10px; justify-content: flex-end; }
.consent-actions button { padding: 9px 18px; border-radius: 8px; }

/* account section */
.account-section { border-top: 1px solid var(--border); }
.account-section h2 { font-size: 13px; margin: 0; padding: 10px 16px 4px; color: var(--muted); }
.account-bar {
  display: flex;
  gap: 8px;
  align-items: center;
  justify-content: space-between;
  padding: 8px 16px 12px;
}
.user-email {
  font-size: 12.5px;
  color: var(--muted);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
/* share page */
.share-wrap { max-width: 860px; margin: 0 auto; padding: 32px 20px 80px; }
.share-wrap .rendered { padding: 0; background: transparent; overflow: visible; }
.share-header { border-bottom: 1px solid var(--border); margin-bottom: 24px; padding-bottom: 12px; }
.share-header h1 { margin: 0 0 4px; }
.share-header .meta { color: var(--muted); font-size: 13px; }
.share-badge {
  float: right;
  font-size: 12px;
  color: var(--muted);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 3px 10px;
}
.share-footer {
  margin-top: 48px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  font-size: 13px;
  color: var(--muted);
}
.share-footer a { color: var(--accent); text-decoration: none; }
.share-footer a:hover { text-decoration: underline; }
@media (max-width: 640px) {
  .share-wrap { padding: 20px 14px 60px; }
  .share-header h1 { font-size: 24px; }
  .consent-card { padding: 26px 22px; }
}