/* The Navigator — the-navigator.ai stylesheet */

:root {
  /* Backgrounds */
  --bg-base: #0a0a0b;
  --bg-surface: #141416;
  --bg-elevated: #1a1a1e;
  --border: #1e1e22;
  --border-subtle: #16161a;

  /* Text */
  --text-primary: #e8e8ec;
  --text-secondary: #9898a0;
  --text-tertiary: #5c5c66;
  --text-bright: #f4f4f6;

  /* Accent */
  --accent: #3b82f6;
  --accent-hover: #60a5fa;
  --accent-dim: rgba(59, 130, 246, 0.1);
  --success: #22c55e;
  --error: #ef4444;

  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'SF Mono', 'Fira Code', 'Consolas', monospace;

  /* Layout */
  --max-content: 720px;
  --max-page: 1200px;
  --radius: 8px;
  --radius-sm: 6px;
}

*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
}

body {
  font-family: var(--font-sans);
  background: var(--bg-base);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

::selection {
  background: var(--accent-dim);
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.15s;
}

a:hover {
  color: var(--accent-hover);
}

/* Layout */
.container {
  max-width: var(--max-content);
  margin: 0 auto;
  padding: 0 1.5rem;
}

@media (min-width: 1024px) {
  .container {
    padding: 0 2rem;
  }
}

/* Navigation */
nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 10, 11, 0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  max-width: var(--max-page);
  margin: 0 auto;
  padding: 0 1.5rem;
  height: 64px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

@media (min-width: 1024px) {
  .nav-inner {
    padding: 0 2rem;
  }
}

.wordmark {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-bright);
  text-decoration: none;
  letter-spacing: -0.02em;
}

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

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.nav-links a {
  font-size: 0.875rem;
  color: var(--text-secondary);
  text-decoration: none;
}

.nav-links a:hover {
  color: var(--text-primary);
}

.nav-links .nav-cta {
  color: var(--accent);
  font-weight: 500;
}

.nav-links .nav-cta:hover {
  color: var(--accent-hover);
}

/* Hero */
.hero {
  padding: 6rem 0 4rem;
}

.hero-label {
  font-size: 0.8rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-tertiary);
  margin-bottom: 1.5rem;
}

.hero h1 {
  font-size: 2.5rem;
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.03em;
  color: var(--text-bright);
}

.hero-desc {
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 540px;
  line-height: 1.7;
  margin-top: 1.5rem;
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 2rem;
  font-size: 1rem;
  font-weight: 500;
  color: var(--accent);
  text-decoration: none;
}

.hero-cta:hover {
  color: var(--accent-hover);
}

.hero-cta span {
  transition: transform 0.2s;
}

.hero-cta:hover span {
  transform: translateX(4px);
}

/* Sections */
section {
  padding: 4rem 0;
  border-top: 1px solid var(--border);
}

.section-header h2 {
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-tertiary);
  margin-bottom: 2rem;
}

/* Article list */
.article-list {
  display: flex;
  flex-direction: column;
}

.article-card {
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--border-subtle);
}

.article-card:first-child {
  padding-top: 0;
}

.article-card:last-child {
  border-bottom: none;
}

.article-date {
  display: block;
  font-size: 0.8rem;
  color: var(--text-tertiary);
  margin-bottom: 0.5rem;
}

.article-card h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.article-card h3 a {
  color: inherit;
  text-decoration: none;
}

.article-card h3 a:hover {
  color: var(--accent);
}

.article-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.article-tags {
  margin-top: 0.75rem;
  display: flex;
  gap: 0.5rem;
}

.tag {
  font-size: 0.7rem;
  color: var(--text-tertiary);
  background: var(--bg-surface);
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  border: 1px solid var(--border);
}

/* Newsletter inline */
.newsletter-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2.5rem;
}

.newsletter-card h2 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
}

.newsletter-card > p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
  max-width: 480px;
  margin-bottom: 1.5rem;
}

/* Subscribe form */
.subscribe-form {
  display: flex;
  gap: 0.75rem;
  max-width: 440px;
}

.subscribe-form input[type="email"] {
  flex: 1;
  padding: 0.75rem 1rem;
  font-size: 0.9rem;
  font-family: var(--font-sans);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  outline: none;
  transition: border-color 0.2s;
}

.subscribe-form input[type="email"]::placeholder {
  color: var(--text-tertiary);
}

.subscribe-form input[type="email"]:focus {
  border-color: var(--accent);
}

.subscribe-form button {
  padding: 0.75rem 1.5rem;
  font-size: 0.875rem;
  font-family: var(--font-sans);
  font-weight: 500;
  background: var(--accent);
  color: #ffffff;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.15s;
}

.subscribe-form button:hover {
  background: var(--accent-hover);
}

.form-msg {
  margin-top: 0.75rem;
  font-size: 0.8rem;
  color: var(--success);
  min-height: 1.2em;
}

.form-msg.error {
  color: var(--error);
}

/* Coming soon */
.upcoming-card {
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  padding: 1.75rem;
}

.badge {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  background: var(--accent-dim);
  border-radius: 4px;
  padding: 0.2rem 0.5rem;
  margin-bottom: 1rem;
}

.upcoming-card h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.upcoming-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
  max-width: 540px;
}

/* Subscribe page */
.subscribe-page {
  padding: 6rem 0;
}

.subscribe-page h1 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-bright);
  margin-bottom: 1rem;
}

.sub-desc {
  font-size: 1.125rem;
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 540px;
  margin-bottom: 2rem;
}

.subscribe-form--large input[type="email"] {
  font-size: 1rem;
  padding: 0.85rem 1.25rem;
}

.subscribe-form--large button {
  font-size: 1rem;
  padding: 0.85rem 2rem;
}

.subscribe-details {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
}

.subscribe-details > p {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 0.75rem;
}

.subscribe-details ul {
  list-style: none;
  padding: 0;
}

.subscribe-details li {
  font-size: 0.875rem;
  color: var(--text-tertiary);
  padding: 0.25rem 0;
  padding-left: 1.25rem;
  position: relative;
}

.subscribe-details li::before {
  content: '\2014';
  position: absolute;
  left: 0;
  color: var(--text-tertiary);
}

/* About page */
.about-page {
  padding: 5rem 0;
}

.about-page h1 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-bright);
  margin-bottom: 2rem;
}

.about-content {
  margin-bottom: 3rem;
}

.about-content .lede {
  font-size: 1.125rem;
  color: var(--text-primary);
  line-height: 1.7;
  margin-bottom: 1.5rem;
}

.about-content p {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 1rem;
}

.contributors {
  padding-top: 2rem;
  border-top: 1px solid var(--border);
  margin-bottom: 3rem;
}

.contributors h2 {
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-tertiary);
  margin-bottom: 1.5rem;
}

.contributor {
  padding: 1.5rem;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.contributor h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
}

.contributor-role {
  font-size: 0.8rem;
  color: var(--text-tertiary);
  margin-top: 0.25rem;
}

.contributor-bio {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-top: 0.75rem;
  line-height: 1.6;
}

.about-publication {
  padding-top: 2rem;
  border-top: 1px solid var(--border);
}

.about-publication h2 {
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-tertiary);
  margin-bottom: 1.5rem;
}

.about-publication p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Footer */
footer {
  padding: 3rem 0;
  border-top: 1px solid var(--border);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}

.footer-brand {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.footer-brand a {
  color: var(--accent);
  text-decoration: none;
}

.footer-links {
  display: flex;
  gap: 1.5rem;
}

.footer-links a {
  font-size: 0.8rem;
  color: var(--text-tertiary);
  text-decoration: none;
}

.footer-links a:hover {
  color: var(--text-secondary);
}

.footer-copy {
  font-size: 0.75rem;
  color: var(--text-tertiary);
}

/* Responsive */
@media (max-width: 639px) {
  .hero {
    padding: 4rem 0 3rem;
  }

  .hero h1 {
    font-size: 1.75rem;
  }

  .wordmark {
    font-size: 1rem;
  }

  .subscribe-form {
    flex-direction: column;
  }

  .subscribe-form button {
    width: 100%;
  }

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }

  .subscribe-page h1,
  .about-page h1 {
    font-size: 1.75rem;
  }
}