/* ---------- Reset ---------- */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

/* ---------- Tokens ---------- */
:root {
  --bg: #0b1120;
  --bg-elevated: #121a2e;
  --text: #e8ecf5;
  --text-muted: #9aa5b8;
  --accent: #4f9dff;
  --accent-text: #0b1120;
  --border: #22304d;
  --radius: 10px;
  --max-width: 880px;
}

body {
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
}

.wrap {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

h1, h2, h3 {
  line-height: 1.2;
  font-weight: 700;
}

a {
  color: inherit;
}

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  background: rgba(11, 17, 32, 0.9);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
  z-index: 10;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 16px;
  padding-bottom: 16px;
}

.brand {
  font-weight: 700;
  text-decoration: none;
  font-size: 1.05rem;
}

.nav nav {
  display: flex;
  gap: 24px;
}

.nav nav a {
  text-decoration: none;
  color: var(--text-muted);
  font-size: 0.95rem;
}

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

/* ---------- Hero ---------- */
.hero {
  padding: 96px 24px 72px;
}

.eyebrow {
  color: var(--accent);
  font-weight: 600;
  letter-spacing: 0.02em;
  margin-bottom: 12px;
  font-size: 0.95rem;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  margin-bottom: 20px;
  max-width: 18ch;
}

.hero-sub {
  color: var(--text-muted);
  max-width: 60ch;
  font-size: 1.05rem;
  margin-bottom: 32px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  text-decoration: none;
  padding: 12px 22px;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 0.95rem;
  transition: opacity 0.15s ease;
}

.btn-primary {
  background: var(--accent);
  color: var(--accent-text);
}

.btn-ghost {
  border: 1px solid var(--border);
  color: var(--text);
}

.btn:hover {
  opacity: 0.85;
}

/* ---------- Sections ---------- */
.section {
  padding: 64px 24px;
  border-top: 1px solid var(--border);
}

.section h2 {
  font-size: 1.6rem;
  margin-bottom: 20px;
}

.section p {
  color: var(--text-muted);
  max-width: 65ch;
}

.section-note {
  font-style: italic;
  margin-bottom: 24px;
  font-size: 0.9rem;
}

/* ---------- Writing list ---------- */
.post-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-top: 8px;
}

.post-list-item {
  display: block;
  text-decoration: none;
  color: inherit;
  padding: 18px 20px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-elevated);
}

.post-list-item:hover {
  border-color: var(--accent);
}

.post-list-item h3 {
  font-size: 1.05rem;
  margin-bottom: 6px;
}

.post-list-item p {
  color: var(--text-muted);
  font-size: 0.9rem;
  max-width: 65ch;
}

.post-list-date {
  display: inline-block;
  margin-top: 10px;
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* ---------- Article (posts/*.html) ---------- */
.post-back {
  display: inline-block;
  margin-top: 32px;
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.88rem;
}

.post-back:hover {
  color: var(--accent);
}

.post h1 {
  font-size: clamp(1.6rem, 4vw, 2.2rem);
  margin: 12px 0 10px;
  text-wrap: balance;
}

.post-byline {
  color: var(--text-muted);
  font-size: 0.88rem;
  margin-bottom: 40px;
}

.post-body {
  max-width: 68ch;
}

.post-body h2 {
  font-size: 1.2rem;
  margin: 40px 0 14px;
}

.post-body p {
  margin-bottom: 16px;
  color: var(--text);
}

.post-body strong {
  color: var(--text);
}

/* ---------- Cards ---------- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
  margin-top: 8px;
}

.card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}

.card h3 {
  font-size: 1.1rem;
  margin: 8px 0 10px;
}

.card p {
  font-size: 0.92rem;
}

.badge {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--accent);
  background: rgba(79, 157, 255, 0.12);
  padding: 3px 8px;
  border-radius: 999px;
}

.badge-live {
  color: #4ade80;
  background: rgba(74, 222, 128, 0.14);
}

.card-link {
  display: inline-block;
  margin-top: 12px;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--accent);
  text-decoration: none;
}

.card-link:hover {
  text-decoration: underline;
}

.card-link-row {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
}

.card-link-muted {
  color: var(--text-muted);
}

/* ---------- Contact ---------- */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-width: 480px;
  margin: 24px 0;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.field label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
}

.field input,
.field textarea {
  font: inherit;
  font-size: 0.95rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 10px 12px;
  border-radius: var(--radius);
  resize: vertical;
}

.field input:focus,
.field textarea:focus {
  outline: 2px solid var(--accent);
  outline-offset: -1px;
}

.contact-form .btn {
  align-self: flex-start;
}

.form-success {
  max-width: 480px;
  margin-top: 20px;
  padding: 12px 16px;
  border-radius: var(--radius);
  background: rgba(74, 222, 128, 0.14);
  border: 1px solid rgba(74, 222, 128, 0.4);
  color: #4ade80;
  font-size: 0.92rem;
}

.form-error {
  max-width: 480px;
  margin-top: 20px;
  padding: 12px 16px;
  border-radius: var(--radius);
  background: rgba(255, 90, 90, 0.12);
  border: 1px solid rgba(255, 90, 90, 0.4);
  color: #ff9a9a;
  font-size: 0.92rem;
}

.contact-or {
  color: var(--text-muted);
  font-size: 0.88rem;
  margin-top: 4px;
}

.contact-links {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: 20px;
}

/* ---------- Footer ---------- */
.site-footer {
  padding: 32px 24px 48px;
  color: var(--text-muted);
  font-size: 0.85rem;
}