:root {
  --bg: #0c0e12;
  --bg-card: #141820;
  --bg-elevated: #1a1f28;
  --border: #2a3142;
  --text: #e8eaef;
  --text-muted: #8b92a5;
  --accent: #5b8def;
  --accent-hover: #7aa3f5;
  --accent-dim: rgba(91, 141, 239, 0.15);
  --success: #4ade80;
  --error: #f87171;
  --radius: 12px;
  --radius-sm: 8px;
  --font: "DM Sans", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", monospace;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  background-image:
    radial-gradient(ellipse 80% 50% at 50% -20%, var(--accent-dim), transparent),
    radial-gradient(ellipse 60% 40% at 100% 100%, rgba(91, 141, 239, 0.06), transparent);
}

html.auth-checking .app {
  visibility: hidden;
}

.app {
  max-width: 1100px;
  margin: 0 auto;
  padding: 2rem 1.5rem 2rem;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.main,
.login-main {
  flex: 1;
}

.app-footer {
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.header {
  text-align: center;
  margin-bottom: 2.5rem;
}

.header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  gap: 1rem;
}

.login-page {
  max-width: 420px;
}

.login-main {
  display: flex;
  justify-content: center;
}

.login-card {
  width: 100%;
}

.login-card .field-label {
  display: block;
  margin: 0.75rem 0 0.35rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-muted);
}

.login-card .field-label:first-of-type {
  margin-top: 0;
}

.login-card input[type="text"],
.login-card input[type="password"] {
  width: 100%;
  padding: 0.85rem 1rem;
  font-family: var(--font);
  font-size: 0.9rem;
  color: var(--text);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: border-color 0.2s;
}

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

.login-card .btn-primary {
  margin-top: 1.25rem;
}

.logo {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
}

.logo-icon {
  font-size: 1.75rem;
  color: var(--accent);
}

.logo h1 {
  margin: 0;
  font-size: 1.85rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.tagline {
  margin: 0.5rem 0 0;
  color: var(--text-muted);
  font-size: 1rem;
}

.main {
  display: grid;
  gap: 2rem;
}

@media (min-width: 900px) {
  .main.has-result {
    grid-template-columns: 1fr 1fr;
    align-items: start;
  }
}

.form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.35rem 1.5rem;
  box-shadow: var(--shadow);
}

.card h2 {
  margin: 0 0 0.25rem;
  font-size: 1.05rem;
  font-weight: 600;
}

.hint {
  margin: 0 0 1rem;
  font-size: 0.875rem;
  color: var(--text-muted);
}

.file-drop {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 120px;
  padding: 1.5rem;
  border: 2px dashed var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
}

.file-drop:hover,
.file-drop.dragover {
  border-color: var(--accent);
  background: var(--accent-dim);
}

.file-drop input {
  display: none;
}

.file-drop-icon {
  font-size: 1.5rem;
  color: var(--accent);
  opacity: 0.9;
}

.file-drop-text {
  color: var(--text-muted);
  font-size: 0.9rem;
  text-align: center;
}

.file-drop.has-file .file-drop-text {
  color: var(--text);
  font-weight: 500;
}

textarea,
input[type="url"] {
  width: 100%;
  padding: 0.85rem 1rem;
  font-family: var(--font);
  font-size: 0.9rem;
  color: var(--text);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  resize: vertical;
  transition: border-color 0.2s;
}

textarea:focus,
input[type="url"]:focus {
  outline: none;
  border-color: var(--accent);
}

.tabs {
  display: flex;
  gap: 0.25rem;
  margin-bottom: 1rem;
}

.tab {
  padding: 0.45rem 1rem;
  font-family: var(--font);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-muted);
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: color 0.2s, background 0.2s;
}

.tab:hover {
  color: var(--text);
}

.tab.active {
  color: var(--accent);
  background: var(--accent-dim);
  border-color: var(--border);
}

.tab-panel {
  display: none;
}

.tab-panel.active {
  display: block;
}

.btn-link {
  margin-top: 0.5rem;
  padding: 0;
  font-family: var(--font);
  font-size: 0.8rem;
  color: var(--accent);
  background: none;
  border: none;
  cursor: pointer;
  text-decoration: underline;
  text-underline-offset: 2px;
}

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

.actions {
  margin-top: 0.25rem;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  width: 100%;
  padding: 0.9rem 1.5rem;
  font-family: var(--font);
  font-size: 1rem;
  font-weight: 600;
  color: #fff;
  background: linear-gradient(135deg, var(--accent), #4a6fc9);
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.2s, opacity 0.2s;
  box-shadow: 0 4px 14px rgba(91, 141, 239, 0.35);
}

.btn-primary:hover:not(:disabled) {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(91, 141, 239, 0.45);
}

.btn-primary:disabled {
  opacity: 0.7;
  cursor: not-allowed;
}

.btn-loader {
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.result-panel {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  position: sticky;
  top: 1.5rem;
}

.result-panel.hidden {
  display: none;
}

.result-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border);
  background: var(--bg-elevated);
}

.result-header h2 {
  margin: 0;
  font-size: 1rem;
  font-weight: 600;
}

.result-actions {
  display: flex;
  gap: 0.5rem;
}

.btn-secondary {
  padding: 0.4rem 0.85rem;
  font-family: var(--font);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
}

.btn-secondary:hover {
  border-color: var(--accent);
  background: var(--accent-dim);
}

.result-content {
  padding: 1.25rem 1.5rem;
  max-height: 70vh;
  overflow-y: auto;
  font-size: 0.9rem;
}

.result-content h1,
.result-content h2,
.result-content h3 {
  margin-top: 1.25em;
  margin-bottom: 0.5em;
  font-weight: 600;
}

.result-content h1:first-child,
.result-content h2:first-child {
  margin-top: 0;
}

.result-content p,
.result-content li {
  color: var(--text-muted);
}

.result-content strong {
  color: var(--text);
}

.result-content code {
  font-family: var(--font-mono);
  font-size: 0.85em;
  padding: 0.15em 0.4em;
  background: var(--bg-elevated);
  border-radius: 4px;
}

.toast {
  position: fixed;
  bottom: 1.5rem;
  left: 50%;
  transform: translateX(-50%);
  padding: 0.75rem 1.25rem;
  font-size: 0.9rem;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow);
  z-index: 100;
  transition: opacity 0.3s;
}

.toast.hidden {
  opacity: 0;
  pointer-events: none;
}

.toast.success {
  background: #14532d;
  color: var(--success);
  border: 1px solid #166534;
}

.toast.error {
  background: #450a0a;
  color: var(--error);
  border: 1px solid #7f1d1d;
}

.banner {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  padding: 0.6rem 1rem;
  font-size: 0.85rem;
  text-align: center;
  background: #422006;
  color: #fbbf24;
  border-bottom: 1px solid #78350f;
  z-index: 50;
}

.banner.hidden {
  display: none;
}

.banner code {
  font-family: var(--font-mono);
  font-size: 0.8em;
  padding: 0.1em 0.35em;
  background: rgba(0, 0, 0, 0.25);
  border-radius: 4px;
}