/* ===== hawser landing — hand-written CSS ===== */

:root {
  --bg:        #0d1117;
  --bg-alt:    #12181f;
  --surface:   #161b22;
  --surface-2: #1c232c;
  --border:    #2a323d;
  --text:      #e6edf3;
  --text-dim:  #9aa7b4;
  --accent:    #7c5cff;   /* hawser violet */
  --accent-2:  #22c3a6;   /* teal */
  --accent-3:  #ffb454;   /* rope amber */
  --code-bg:   #0a0e14;
  --shadow:    0 10px 40px rgba(0,0,0,.4);
  --radius:    14px;
  --mono: ui-monospace, "SF Mono", "JetBrains Mono", "Fira Code", Menlo, Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

[data-theme="light"] {
  --bg:        #f7f9fc;
  --bg-alt:    #eef2f7;
  --surface:   #ffffff;
  --surface-2: #f0f3f8;
  --border:    #d8dee6;
  --text:      #1a2230;
  --text-dim:  #5b6672;
  --code-bg:   #0f1420;
  --shadow:    0 10px 30px rgba(30,40,60,.12);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

code {
  font-family: var(--mono);
  font-size: .9em;
  background: var(--surface-2);
  padding: .1em .4em;
  border-radius: 5px;
  border: 1px solid var(--border);
}

em { font-style: normal; color: var(--accent); }

/* ===== NAV ===== */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding: .75rem clamp(1rem, 5vw, 3rem);
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.brand { display: flex; align-items: center; gap: .5rem; font-weight: 700; color: var(--text); }
.brand:hover { text-decoration: none; }
.brand-mark { font-size: 1.4rem; }
.brand-name { font-family: var(--mono); letter-spacing: -.5px; }
.nav-links { display: flex; gap: 1.25rem; margin-left: auto; align-items: center; }
.nav-links a { color: var(--text-dim); font-size: .92rem; }
.nav-links a:hover { color: var(--text); text-decoration: none; }
.nav-gh { color: var(--text) !important; font-weight: 600; }
.nav-lang {
  color: var(--text) !important; font-weight: 600; font-family: var(--mono);
  font-size: .82rem; border: 1px solid var(--border); border-radius: 7px;
  padding: .15rem .5rem; line-height: 1;
}
.nav-lang:hover { border-color: var(--accent); text-decoration: none; }
.theme-toggle {
  background: var(--surface); border: 1px solid var(--border); color: var(--text);
  width: 34px; height: 34px; border-radius: 8px; cursor: pointer; font-size: 1rem;
}
.theme-toggle:hover { border-color: var(--accent); }

/* ===== HERO ===== */
.hero {
  padding: clamp(2.5rem, 7vw, 5.5rem) clamp(1rem, 5vw, 3rem);
  background:
    radial-gradient(900px 500px at 80% -10%, color-mix(in srgb, var(--accent) 18%, transparent), transparent),
    radial-gradient(700px 400px at 0% 20%, color-mix(in srgb, var(--accent-2) 12%, transparent), transparent);
}
.hero-inner {
  max-width: 1180px; margin: 0 auto;
  display: grid; grid-template-columns: 1.1fr .9fr; gap: clamp(1.5rem, 4vw, 3.5rem);
  align-items: center;
}
.eyebrow { font-family: var(--mono); color: var(--text-dim); font-size: .85rem; margin: 0 0 1rem; }
.badge {
  display: inline-block; background: color-mix(in srgb, var(--accent) 20%, transparent);
  color: var(--accent); border: 1px solid color-mix(in srgb, var(--accent) 40%, transparent);
  padding: .05em .5em; border-radius: 999px; font-size: .78rem; font-weight: 600;
}
.hero h1 {
  font-size: clamp(2.1rem, 5vw, 3.4rem); line-height: 1.08; margin: 0 0 1.2rem; letter-spacing: -1.5px;
}
.tagline { font-size: clamp(1rem, 2vw, 1.2rem); color: var(--text-dim); max-width: 40ch; margin: 0 0 1.8rem; }
.cta-row { display: flex; flex-wrap: wrap; gap: .75rem; margin-bottom: 1.2rem; }
.hero-note { font-family: var(--mono); font-size: .8rem; color: var(--text-dim); }
.hero-art img {
  width: 100%; height: auto; border-radius: var(--radius);
  box-shadow: var(--shadow); border: 1px solid var(--border);
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex; align-items: center; gap: .4rem;
  padding: .7rem 1.2rem; border-radius: 10px; font-weight: 600; font-size: .95rem;
  border: 1px solid var(--border); background: var(--surface); color: var(--text);
  transition: transform .12s ease, border-color .12s ease, background .12s ease;
}
.btn:hover { text-decoration: none; transform: translateY(-2px); border-color: var(--accent); }
.btn-primary {
  background: linear-gradient(135deg, var(--accent), color-mix(in srgb, var(--accent) 60%, var(--accent-2)));
  color: #fff; border-color: transparent;
  box-shadow: 0 6px 20px color-mix(in srgb, var(--accent) 40%, transparent);
}
.btn-primary:hover { color: #fff; }
.btn-ghost { background: transparent; }

/* ===== SECTIONS ===== */
.section { padding: clamp(3rem, 7vw, 5rem) clamp(1rem, 5vw, 3rem); max-width: 1180px; margin: 0 auto; }
.section-alt { max-width: none; background: var(--bg-alt); border-block: 1px solid var(--border); }
.section-alt > * { max-width: 1180px; margin-inline: auto; }
.section-head { text-align: center; margin-bottom: 2.5rem; }
.section-head h2 { font-size: clamp(1.6rem, 3.5vw, 2.3rem); margin: 0 0 .6rem; letter-spacing: -.8px; }
.lede { color: var(--text-dim); max-width: 58ch; margin: 0 auto; font-size: 1.05rem; }
.lede.center { text-align: center; margin-top: 2rem; }
.center { text-align: center; }

/* ===== GRIDS / CARDS ===== */
.grid { display: grid; gap: 1.1rem; }
.cards-5 { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.cards-domains { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.docs-grid { grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); }

.card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 1.5rem; transition: transform .15s ease, border-color .15s ease;
}
.card:hover { transform: translateY(-3px); border-color: color-mix(in srgb, var(--accent) 50%, var(--border)); }
.card-icon { font-size: 1.8rem; display: block; margin-bottom: .6rem; }
.card h3 { margin: 0 0 .5rem; font-size: 1.15rem; }
.card p { margin: 0; color: var(--text-dim); font-size: .95rem; }
.card-quote { display: flex; align-items: center; background: var(--surface-2); border-style: dashed; }
.card-quote p { color: var(--text); font-size: 1rem; }

.not-a-wrapper {
  margin-top: 2rem; text-align: center; color: var(--text-dim);
  max-width: 62ch; margin-inline: auto; font-size: 1.05rem;
}

/* ===== CODE BLOCK ===== */
.code-block { position: relative; max-width: 760px; margin: 0 auto; }
.code-block pre {
  background: var(--code-bg); color: #dbe4ee; border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1.4rem 1.5rem; overflow-x: auto;
  font-family: var(--mono); font-size: .9rem; line-height: 1.7; box-shadow: var(--shadow);
}
.code-block code { background: none; border: none; padding: 0; font-size: inherit; color: inherit; }
.c-comment { color: #6b7684; }
.c-prompt { color: var(--accent-2); user-select: none; }
.copy-btn {
  position: absolute; top: .7rem; right: .7rem;
  background: var(--surface-2); border: 1px solid var(--border); color: var(--text-dim);
  padding: .3rem .7rem; border-radius: 7px; font-size: .78rem; cursor: pointer; font-family: var(--mono);
  transition: all .12s ease;
}
.copy-btn:hover { color: var(--text); border-color: var(--accent); }
.copy-btn.copied { color: var(--accent-2); border-color: var(--accent-2); }

/* ===== COURSE ===== */
.course {
  list-style: none; padding: 0; margin: 0 0 2.5rem;
  display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 1rem; counter-reset: none;
}
.course-step a {
  display: flex; gap: 1rem; align-items: flex-start;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 1.2rem 1.3rem; color: var(--text); height: 100%;
  transition: transform .15s ease, border-color .15s ease;
}
.course-step a:hover { text-decoration: none; transform: translateY(-3px); border-color: var(--accent); }
.step-num {
  font-family: var(--mono); font-weight: 700; font-size: 1.1rem;
  color: var(--accent); background: color-mix(in srgb, var(--accent) 15%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent) 35%, transparent);
  min-width: 2.4rem; height: 2.4rem; display: grid; place-items: center; border-radius: 9px; flex: none;
}
.step-body { display: flex; flex-direction: column; gap: .2rem; }
.step-body strong { font-size: 1.02rem; }
.step-body span { color: var(--text-dim); font-size: .9rem; }

/* ===== DOCS LINKS ===== */
.doc-link {
  display: block; background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1.3rem; color: var(--text);
  transition: transform .15s ease, border-color .15s ease;
}
.doc-link:hover { text-decoration: none; transform: translateY(-3px); border-color: var(--accent); }
.doc-link h3 { margin: 0 0 .4rem; font-size: 1.05rem; color: var(--accent); }
.doc-link p { margin: 0; color: var(--text-dim); font-size: .9rem; }

/* ===== TABS ===== */
.tabs { display: flex; flex-wrap: wrap; gap: .5rem; justify-content: center; margin-bottom: 1.3rem; }
.tab {
  background: var(--surface); border: 1px solid var(--border); color: var(--text-dim);
  padding: .5rem 1.1rem; border-radius: 999px; cursor: pointer; font-family: var(--mono); font-size: .88rem;
  transition: all .12s ease;
}
.tab:hover { color: var(--text); }
.tab.active { color: #fff; background: var(--accent); border-color: var(--accent); }
.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* ===== FOOTER ===== */
.footer { background: var(--bg-alt); border-top: 1px solid var(--border); padding: 3rem clamp(1rem, 5vw, 3rem) 2rem; }
.footer-grid {
  max-width: 1180px; margin: 0 auto;
  display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 2rem;
}
.footer-col h4 { margin: 0 0 .8rem; font-size: .82rem; text-transform: uppercase; letter-spacing: 1px; color: var(--text-dim); }
.footer-col a { display: block; color: var(--text-dim); font-size: .92rem; margin-bottom: .4rem; }
.footer-col a:hover { color: var(--text); text-decoration: none; }
.footer-tag { color: var(--text-dim); font-size: .92rem; max-width: 34ch; margin: .8rem 0 0; }
.footer-small { color: var(--text-dim); font-size: .82rem; margin: .3rem 0 0; }
.footer-bottom {
  max-width: 1180px; margin: 2.5rem auto 0; padding-top: 1.5rem; border-top: 1px solid var(--border);
  color: var(--text-dim); font-size: .85rem; text-align: center;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 860px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-art { order: -1; }
  .hero-art img { max-width: 420px; margin: 0 auto; display: block; }
  .nav-links { display: none; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 520px) {
  .footer-grid { grid-template-columns: 1fr; }
  .cta-row .btn { flex: 1 1 auto; justify-content: center; }
}

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