:root {
  --bg: #f5f6f8;
  --surface: #ffffff;
  --border: #e2e4e9;
  --text: #1a1d23;
  --text-muted: #666d7a;
  --accent: #3d5afe;
  --accent-hover: #2f47d6;
  --accent-soft: #eef0ff;
  --success: #1a7f4e;
  --success-bg: #e8f7ef;
  --error: #c0362c;
  --error-bg: #fdecea;
  --radius: 12px;
  --shadow: 0 1px 2px rgba(16, 20, 30, 0.04), 0 8px 24px rgba(16, 20, 30, 0.06);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14161b;
    --surface: #1c1f26;
    --border: #2b2f38;
    --text: #eceef1;
    --text-muted: #9aa1ad;
    --accent: #7086ff;
    --accent-hover: #8a9dff;
    --accent-soft: #232a4d;
    --success: #4ade95;
    --success-bg: #12291f;
    --error: #ff8b80;
    --error-bg: #331a18;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.2), 0 8px 24px rgba(0, 0, 0, 0.35);
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

.page {
  max-width: 720px;
  margin: 0 auto;
  padding: 48px 20px 80px;
}

.page-header {
  margin-bottom: 32px;
}

.page-header h1 {
  font-size: 1.75rem;
  font-weight: 650;
  margin: 0 0 6px;
  letter-spacing: -0.01em;
}

.subtitle {
  color: var(--text-muted);
  margin: 0;
  font-size: 0.95rem;
}

.page-header-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
}

.signout-link {
  font-size: 0.85rem;
  color: var(--text-muted);
  text-decoration: none;
  white-space: nowrap;
  padding-top: 4px;
}

.signout-link:hover {
  color: var(--accent);
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 24px;
  margin-bottom: 20px;
}

.card h2 {
  font-size: 1rem;
  font-weight: 600;
  margin: 0 0 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.dropzone {
  border: 1.5px dashed var(--border);
  border-radius: var(--radius);
  padding: 36px 20px;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.15s ease, background 0.15s ease;
  color: var(--text-muted);
}

.dropzone:hover {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.dropzone.dragover {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--text);
}

.dropzone-content { pointer-events: none; }

.dropzone-icon {
  width: 32px;
  height: 32px;
  margin-bottom: 10px;
  color: var(--accent);
}

.dropzone p { margin: 0; font-size: 0.9rem; }

.link-form {
  display: flex;
  gap: 10px;
}

.link-form input {
  flex: 1;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  color: var(--text);
  font-size: 0.9rem;
}

.link-form input:focus {
  outline: none;
  border-color: var(--accent);
}

button {
  padding: 10px 18px;
  border: none;
  border-radius: 8px;
  background: var(--accent);
  color: white;
  font-size: 0.9rem;
  font-weight: 550;
  cursor: pointer;
  transition: background 0.15s ease;
}

button:hover { background: var(--accent-hover); }
button:disabled { opacity: 0.6; cursor: default; }

.status {
  min-height: 1px;
  margin-bottom: 20px;
}

.status.visible {
  padding: 12px 16px;
  border-radius: 8px;
  font-size: 0.88rem;
}

.status.success { background: var(--success-bg); color: var(--success); }
.status.error { background: var(--error-bg); color: var(--error); }

.count-badge {
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 2px 9px;
  border-radius: 999px;
}

.doc-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.doc-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 12px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
}

.doc-source {
  font-size: 0.85rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--text);
}

.chunk-badge {
  flex-shrink: 0;
  font-size: 0.75rem;
  color: var(--text-muted);
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 2px 8px;
  border-radius: 999px;
}

.doc-empty {
  color: var(--text-muted);
  font-size: 0.88rem;
  padding: 8px 12px;
}

.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.login-card {
  width: 100%;
  max-width: 360px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.login-card h1 {
  font-size: 1.4rem;
  font-weight: 650;
  margin: 0 0 2px;
  letter-spacing: -0.01em;
}

.login-card .subtitle {
  margin: 0 0 16px;
}

.login-card label {
  font-size: 0.8rem;
  font-weight: 550;
  color: var(--text-muted);
  margin-top: 10px;
  margin-bottom: 4px;
}

.login-card input {
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  color: var(--text);
  font-size: 0.9rem;
}

.login-card input:focus {
  outline: none;
  border-color: var(--accent);
}

.login-card button {
  margin-top: 18px;
}

.login-card .status.visible {
  margin-bottom: 4px;
}