:root {
  --bg: #fffdf7;
  --ink: #222;
  --muted: #666;
  --card: #ffffff;
  --primary: #1e7b85;
  --primary-ink: #ffffff;
  --secondary: #e0e7ef;
  --accent: #ffcf6e;
  --border: #e8e2d3;
  --error: #b00020;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, Ubuntu, Cantarell, "Noto Sans", "Apple Color Emoji", "Segoe UI Emoji";
  color: var(--ink);
  background: var(--bg);
  line-height: 1.5;
}

#app { max-width: 960px; margin: 0 auto; padding: 16px; }
.app-header { display: flex; align-items: center; justify-content: space-between; padding: 12px 0; }
.app-header h1 { margin: 0; font-size: 1.25rem; }
.app-header nav button { margin-left: 8px; }

.hide { display: none !important; }

.card { background: var(--card); border: 1px solid var(--border); border-radius: 8px; padding: 16px; box-shadow: 0 1px 2px rgba(0,0,0,.04); margin-bottom: 16px; }

.btn { appearance: none; border: 1px solid var(--border); background: #f5f5f5; color: var(--ink); border-radius: 6px; padding: 8px 12px; cursor: pointer; font: inherit; }
.btn:hover { filter: brightness(0.98); }
.btn:disabled { opacity: .6; cursor: not-allowed; }
.btn-primary { background: var(--primary); color: var(--primary-ink); border-color: var(--primary); }
.btn-secondary { background: var(--secondary); color: #0a0a0a; border-color: var(--secondary); }

main#view { padding-top: 12px; }

/* Forms */
label { display: block; margin-bottom: 12px; font-weight: 600; }
label > input, label > textarea { display: block; margin-top: 4px; }
input[type="text"], input[type="email"], input[type="number"], input[type="password"], input[type="file"], textarea {
  width: 100%;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: #fff;
  color: var(--ink);
  font: inherit;
}
textarea { min-height: 96px; resize: vertical; }

.row { display: flex; gap: 12px; }
.col { flex: 1; }

/* Typeahead */
.ta-list { position: absolute; top: 100%; left: 0; background: #fff; border: 1px solid var(--border); border-radius: 6px; box-shadow: 0 8px 24px rgba(0,0,0,.12); margin-top: 2px; max-height: 240px; overflow: auto; z-index: 20; }
.ta-item { padding: 8px 10px; cursor: pointer; }
.ta-item.active, .ta-item:hover { background: var(--secondary); }

/* Chips */
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin: 4px 0 12px; }
.chip { display: inline-flex; align-items: center; gap: 6px; background: var(--secondary); padding: 4px 10px; border-radius: 16px; font-size: .9rem; }
.chip button { border: 0; background: transparent; color: var(--muted); cursor: pointer; padding: 0 2px; }

/* Helpers */
.muted { color: var(--muted); }
.error { color: var(--error); min-height: 1.25em; }

.nudges { margin-top: 8px; display: flex; flex-wrap: wrap; gap: 8px; }
.nudge { background: var(--accent); color: #000; padding: 4px 8px; border-radius: 12px; font-size: .85rem; }

/* Modal + Whiteboard */
.modal-overlay { position: fixed; inset: 0; background: rgba(0,0,0,.4); display: flex; align-items: center; justify-content: center; z-index: 1000; }
.modal { background: var(--card); border: 1px solid var(--border); border-radius: 8px; padding: 12px; width: calc(100% - 32px); max-width: 720px; box-shadow: 0 16px 40px rgba(0,0,0,.25); }

.wb-modal { padding: 8px 12px 12px; }
.wb-toolbar { display: flex; align-items: center; flex-wrap: wrap; gap: 12px; margin-bottom: 8px; }
.wb-colors { display: flex; gap: 6px; }
.wb-color { width: 24px; height: 24px; border-radius: 50%; border: 2px solid #fff; box-shadow: 0 0 0 1px rgba(0,0,0,.2); cursor: pointer; }
.wb-color.active { outline: 2px solid var(--primary); }
.wb-size { display: inline-flex; align-items: center; gap: 6px; }
.wb-canvas { display: block; width: 100%; background: #fff; border: 1px solid var(--border); border-radius: 4px; }

.wb-toolbar .btn.active { outline: 2px solid var(--primary); }

/* Authentication tabs */
.auth-tab {
  transition: opacity 0.3s ease;
}

.auth-tab.hide {
  display: none;
}

.auth-switch {
  text-align: center;
  margin-top: 1rem;
  color: #666;
}

.auth-switch a {
  color: #007bff;
  text-decoration: none;
  font-weight: 500;
}

.auth-switch a:hover {
  text-decoration: underline;
}

/* Form validation styles */
input:invalid {
  border-color: #dc3545;
}

input:valid {
  border-color: #28a745;
}

.error {
  color: #dc3545;
  font-size: 0.875rem;
  margin-top: 0.25rem;
}