:root {
  --bg: #fbf9f8;
  --surface: #ffffff;
  --surface-2: #171d1c;
  --border: #e7e3e1;
  --fg: #17191b;
  --muted: #6b7270;
  --gradient-from: #6366f1;
  --gradient-to: #06b6d4;
  --font-sans: "Roboto", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  --radius: 10px;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-sans);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

a:hover {
  color: var(--gradient-from);
}

h1, h2, h3, h4 {
  font-weight: 300;
  letter-spacing: -0.02em;
}

code, pre {
  font-family: var(--font-mono);
}

/* Nav */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(251, 249, 248, 0.88);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

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

.wordmark {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: 0.02em;
  background: linear-gradient(90deg, var(--gradient-from), var(--gradient-to));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.nav nav a {
  margin-left: 20px;
  text-decoration: none;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 400;
  transition: color 0.15s ease;
}

.nav nav a:hover {
  color: var(--fg);
}

.nav-btn {
  display: inline-block;
  padding: 6px 14px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--fg) !important;
  font-weight: 500 !important;
}

.nav-btn:hover {
  border-color: var(--gradient-from);
}

/* Main Container */
main {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 24px;
  width: 100%;
}

/* Hero */
.hero {
  text-align: center;
  padding: 64px 0 40px;
}

.ascii-logo {
  display: inline-block;
  font-family: Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  font-size: 0.85rem;
  font-variant-ligatures: none;
  line-height: 1.3;
  margin: 0 0 28px;
  text-align: left;
  background: linear-gradient(90deg, var(--gradient-from), var(--gradient-to));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  white-space: pre;
  overflow-x: auto;
}

.hero h1 {
  font-size: 2.25rem;
  margin: 0 0 16px;
}

.hero p.lead {
  color: var(--muted);
  max-width: 680px;
  margin: 0 auto 32px;
  font-size: 1.15rem;
  line-height: 1.6;
}

.cta-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}

.endpoint-pill {
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 10px 18px;
  border-radius: 8px;
  font-size: 0.95rem;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--fg);
}

.btn {
  display: inline-block;
  padding: 10px 18px;
  border-radius: 8px;
  border: 1px solid var(--border);
  text-decoration: none;
  color: var(--fg);
  font-size: 0.95rem;
  background: var(--surface);
  cursor: pointer;
  transition: all 0.15s ease;
}

.btn:hover {
  border-color: var(--gradient-from);
}

.btn-primary {
  background: linear-gradient(90deg, var(--gradient-from), var(--gradient-to));
  color: #ffffff !important;
  border-color: transparent;
  font-weight: 500;
}

.btn-primary:hover {
  opacity: 0.92;
  transform: translateY(-1px);
}

.btn-secondary {
  background: var(--surface);
  border-color: var(--border);
  color: var(--fg);
}

.btn-secondary:hover {
  border-color: var(--gradient-from);
}

.btn-google {
  background: #ffffff;
  color: #1f2937 !important;
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  width: 100%;
  font-weight: 500;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
}

.btn-google:hover {
  background: #f9fafb;
  border-color: #cbd5e1;
}

.btn-mock {
  background: rgba(99, 102, 241, 0.08);
  border: 1px solid rgba(99, 102, 241, 0.25);
  color: #4338ca !important;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  width: 100%;
  font-weight: 500;
}

.btn-mock:hover {
  background: rgba(99, 102, 241, 0.15);
  border-color: rgba(99, 102, 241, 0.4);
}

.btn-danger {
  background: rgba(239, 68, 68, 0.08);
  border: 1px solid rgba(239, 68, 68, 0.25);
  color: #dc2626 !important;
}

.btn-danger:hover {
  background: rgba(239, 68, 68, 0.15);
  border-color: rgba(239, 68, 68, 0.4);
}

/* Sections */
section {
  padding: 48px 0;
  border-top: 1px solid var(--border);
}

section h2 {
  font-size: 1.65rem;
  margin-bottom: 12px;
}

section p.section-sub {
  color: var(--muted);
  font-size: 1rem;
  margin-top: 0;
  margin-bottom: 28px;
}

/* Explainer Cards */
.explain-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin: 32px 0 16px;
}

.explain-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: 0 1px 3px rgba(23, 25, 27, 0.03);
}

.explain-card h3 {
  font-size: 1.15rem;
  margin: 0 0 10px;
  font-weight: 500;
}

.explain-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.55;
}

/* Code Boxes */
pre {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  overflow-x: auto;
  font-size: 0.88rem;
  color: #cbe5d6;
  line-height: 1.5;
}

pre code {
  color: inherit;
}

code {
  background: rgba(23, 25, 27, 0.05);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.88em;
}

pre code {
  background: none;
  padding: 0;
}

/* Steps list */
.step-list {
  padding-left: 20px;
  color: var(--fg);
}

.step-list li {
  margin-bottom: 16px;
  line-height: 1.6;
}

.step-list strong {
  font-weight: 600;
}

/* Client Guide Styling */
.guide-content h3 {
  font-size: 1.2rem;
  font-weight: 500;
  margin: 28px 0 12px;
}

.guide-content p {
  color: var(--fg);
  font-size: 0.95rem;
}

.guide-content ul {
  padding-left: 20px;
  margin-bottom: 20px;
}

.guide-content li {
  margin-bottom: 8px;
  color: var(--muted);
}

.guide-content li strong {
  color: var(--fg);
}

/* Footer */
footer {
  border-top: 1px solid var(--border);
  text-align: center;
  padding: 36px 24px;
  color: var(--muted);
  font-size: 0.88rem;
  margin-top: auto;
}

/* Login Card View */
.auth-wrapper {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 60px 24px;
}

.auth-card {
  width: 100%;
  max-width: 440px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 36px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
}

.auth-header {
  text-align: center;
  margin-bottom: 24px;
}

.auth-header h2 {
  font-size: 1.6rem;
  font-weight: 400;
  margin-bottom: 8px;
}

.auth-header p {
  color: var(--muted);
  font-size: 0.92rem;
}

.auth-actions {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.user-badge {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px 16px;
  margin-bottom: 20px;
}

.user-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--gradient-from), var(--gradient-to));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: #fff;
}

.tenant-pill {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  background: rgba(99, 102, 241, 0.1);
  border: 1px solid rgba(99, 102, 241, 0.2);
  color: #4f46e5;
  padding: 2px 8px;
  border-radius: 4px;
  display: inline-block;
  margin-top: 4px;
}

.consent-box {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  margin-bottom: 20px;
  font-size: 0.88rem;
}

.consent-box ul {
  list-style-type: none;
  margin: 10px 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.consent-box li {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--fg);
}

.consent-box li::before {
  content: "✓";
  color: #10b981;
  font-weight: bold;
}

@media (max-width: 760px) {
  .explain-grid {
    grid-template-columns: 1fr;
  }
  .hero h1 {
    font-size: 1.75rem;
  }
  .ascii-logo {
    font-size: 0.52rem;
  }
}