/* xanthos.tech — minimal developer aesthetic */

:root {
  --bg: #0b0d10;
  --panel: #0f1318;
  --text: #e6e8ee;
  --muted: #a7b0bf;
  --border: rgba(255, 255, 255, 0.10);
  --border-strong: rgba(255, 255, 255, 0.16);
  --accent: #7bd88f;
  /* restrained "terminal green" */
  --accent-2: #7aa6ff;
  /* optional secondary for focus */
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.45);
  --text-strong: rgba(230,232,238,0.86);
  --text-heading: rgba(230,232,238,0.78);
  --text-lede: rgba(230,232,238,0.70);
  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  --sans: "Recursive", ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

body {
  margin: 0;
  background-color: var(--bg);

  background-image:
    /* Layer A */
    radial-gradient(1200px 700px at 12% 0%, rgba(123, 216, 143, 0.08), transparent 60%),
    radial-gradient(900px 600px at 90% 10%, rgba(122, 166, 255, 0.07), transparent 60%),

    /* Layer B (inverted + offset) */
    radial-gradient(1200px 700px at 88% 100%, rgba(123, 216, 143, 0.06), transparent 60%),
    radial-gradient(900px 600px at 10% 90%, rgba(122, 166, 255, 0.05), transparent 60%);

  background-repeat: no-repeat;
  background-attachment: fixed;
  background-size: 100% 120vh;

  color: var(--text);
  font-family: var(--sans);
  line-height: 1.55;
}

h1 {
  color: var(--text-strong);
}

h2, h3 {
  color: var(--text-heading);
}

.lede {
  color: var(--text-lede);
}

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

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

a:focus {
  outline: 2px solid var(--accent-2);
  outline-offset: 3px;
  border-radius: 6px;
}

.skip {
  position: absolute;
  left: -999px;
  top: 10px;
  background: var(--panel);
  border: 1px solid var(--border);
  padding: 8px 12px;
  border-radius: 10px;
}

.skip:focus {
  left: 10px;
  z-index: 10;
}

.wrap {
  width: min(980px, calc(100% - 40px));
  margin: 0 auto;
}

/* Desktop/header default: keep the original "cool" sticky header behaviour */
.top {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(12px);
  background: rgba(11, 13, 16, 0.72);
  border-bottom: 1px solid var(--border);
}

.top .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 14px 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 240px;
}

.mark {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  border: 1px solid var(--border-strong);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.01));
  font-family: var(--mono);
  color: var(--accent);
  box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.25) inset;
}

.mark-glyph{
  display: block;
  line-height: 1;
  color: var(--accent);

  /* Optical centering that scales with font size */
  transform: translateY(-0.06em);
}

/* Syne variant */
.mark-glyph.syne{
  font-family: "Syne", var(--sans);
  font-weight: 800;
  font-size: 19px;          /* adjust freely */
  letter-spacing: -0.04em;
}

.name {
  font-family: var(--mono);
  font-size: 14px;
  letter-spacing: 0.3px;
  color: var(--text);
}

.tag {
  font-size: 12px;
  color: var(--muted);
  max-width: 520px;
}

.nav {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.nav a {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--muted);
  padding: 6px 8px;
  border-radius: 10px;
  border: 1px solid transparent;
}

.nav a:hover {
  color: var(--text);
  border-color: var(--border);
  background: rgba(255, 255, 255, 0.03);
}

/* IMPORTANT: hide mobile menu by default (desktop) */
.nav-mobile {
  display: none;
}

.hero {
  padding: 54px 0 30px;
}

.kicker {
  font-family: var(--mono);
  color: var(--muted);
  font-size: 12px;
  margin: 0 0 10px;
}

h1 {
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.15;
  margin: 0 0 14px;
  letter-spacing: -0.02em;
}

.lede {
  max-width: 78ch;
  font-size: 16px;
  margin: 0 0 18px;
}

.cta {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin: 18px 0 18px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 14px;
  border-radius: 12px;
  border: 1px solid var(--border-strong);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.2px;
  cursor: pointer;
}

.btn:hover {
  border-color: rgba(123, 216, 143, 0.45);
  box-shadow: 0 0 0 1px rgba(123, 216, 143, 0.18) inset;
}

.btn--ghost {
  background: transparent;
  color: var(--muted);
}

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

.mono-note {
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 12px 14px;
  background: rgba(255, 255, 255, 0.02);
  font-family: var(--mono);
  font-size: 12px;
  color: var(--muted);
  display: flex;
  gap: 10px;
  align-items: center;
  max-width: 78ch;
}

.prompt {
  color: var(--accent);
}

.section {
  padding: 34px 0;
  border-top: 1px solid var(--border);
}

.section-head {
  display: grid;
  gap: 6px;
  margin-bottom: 18px;
}

h2 {
  margin: 0;
  font-size: 18px;
  font-family: var(--mono);
  letter-spacing: 0.2px;
}

.section-head p {
  margin: 0;
  color: var(--muted);
  max-width: 80ch;
  font-size: 14px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 12px;
}

.card {
  grid-column: span 6;
  border: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.03), rgba(255, 255, 255, 0.01));
  border-radius: 16px;
  padding: 14px 14px 12px;
  box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.25) inset;
}

.card h3 {
  margin: 0 0 8px;
  font-size: 14px;
  font-family: var(--mono);
  color: var(--text);
}

.card p {
  margin: 0 0 10px;
  color: var(--muted);
  font-size: 13px;
}

.card ul {
  margin: 0;
  padding-left: 18px;
  color: rgba(230, 232, 238, 0.86);
  font-size: 13px;
}

.card li {
  margin: 4px 0;
}

.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.panel {
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.02);
  border-radius: 16px;
  padding: 14px;
}

.panel h3 {
  margin: 0 0 10px;
  font-family: var(--mono);
  font-size: 14px;
}

.checks {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 10px;
}

.checks li {
  padding-left: 22px;
  position: relative;
  color: rgba(230, 232, 238, 0.90);
  font-size: 13px;
}

.checks li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--accent);
  font-family: var(--mono);
}

.pillbox {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 8px 0 14px;
}

.pill {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--muted);
  border: 1px solid var(--border);
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.02);
}

.mono-block {
  border: 1px solid var(--border);
  border-radius: 14px;
  background: rgba(0, 0, 0, 0.18);
  padding: 12px;
}

.mono-title {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 8px;
}

pre {
  margin: 0;
  white-space: pre-wrap;
  word-break: break-word;
}

code {
  font-family: var(--mono);
  font-size: 12px;
  color: rgba(230, 232, 238, 0.88);
}

.list-cards {
  display: grid;
  gap: 10px;
}

.list-card {
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 14px;
  background: rgba(255, 255, 255, 0.02);
}

.list-card h3 {
  margin: 0 0 6px;
  font-family: var(--mono);
  font-size: 14px;
}

.list-card p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.contact {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 12px;
}

.form {
  display: grid;
  gap: 12px;
  margin-top: 10px;
}

label span {
  display: block;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 6px;
}

input,
textarea {
  width: 100%;
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: rgba(0, 0, 0, 0.22);
  color: var(--text);
  font-family: var(--sans);
  font-size: 14px;
}

input:focus,
textarea:focus {
  outline: none;
  border-color: rgba(122, 166, 255, 0.55);
  box-shadow: 0 0 0 3px rgba(122, 166, 255, 0.12);
}

.status {
  margin: 10px 0 0;
  font-size: 13px;
  color: var(--muted);
}

.status--ok {
  color: rgba(123, 216, 143, 0.95);
}

.status--error {
  color: rgba(255, 140, 140, 0.95);
}

.muted {
  color: var(--muted);
  font-size: 13px;
}

.small {
  margin: 0;
  padding-left: 18px;
  color: rgba(230, 232, 238, 0.86);
  font-size: 13px;
}

.small li {
  margin: 6px 0;
}

.legal {
  margin-top: 16px;
  border-top: 1px solid var(--border);
  padding-top: 14px;
}

.footer {
  padding: 28px 0 36px;
  border-top: 1px solid var(--border);
  margin-top: 18px;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  flex-wrap: wrap;
}

.mono {
  font-family: var(--mono);
  color: var(--muted);
  font-size: 12px;
}

@media (max-width: 860px){
  /* Hide the long desktop tagline in the header */
  .tag{ display: none; }

  /* Hide desktop nav, show mobile menu */
  .nav{ display: none; }
  .nav-mobile{ display: block; }

  /* Header spacing */
  .top .wrap{
    padding: 12px 0;
  }

  /* Only on mobile: create a positioning context for the overlay menu */
  .top{
    position: relative;
    z-index: 100;
  }

  /* <details> wrapper */
  .nav-mobile{
    position: relative;
  }

  /* Summary button */
  .nav-mobile summary{
    list-style: none;
    cursor: pointer;
    user-select: none;

    font-family: var(--mono);
    font-size: 12px;
    color: var(--muted);

    padding: 8px 10px;
    border-radius: 12px;
    border: 1px solid var(--border);
    background: rgba(255,255,255,0.02);
  }

  /* Remove default disclosure marker (Chrome/Safari) */
  .nav-mobile summary::-webkit-details-marker{
    display: none;
  }

  /* Summary hover/focus polish */
  .nav-mobile summary:hover{
    color: var(--text);
    border-color: var(--border-strong);
    background: rgba(255,255,255,0.03);
  }

  .nav-mobile[open] summary{
    color: var(--text);
    border-color: var(--border-strong);
  }

  /* Overlay panel (does not expand header) */
  .nav-mobile__panel{
    position: absolute;
    top: calc(100% + 10px);
    right: 0;

    width: min(280px, 92vw);

    border: 1px solid var(--border);
    background: rgba(11,13,16,0.96);
    backdrop-filter: blur(6px);

    border-radius: 16px;
    padding: 10px;

    box-shadow: var(--shadow);
    z-index: 1000;

    display: grid;
    gap: 6px;

    /* Closed-state animation */
    opacity: 0;
    transform: translateY(-4px) scale(0.98);
    pointer-events: none;

    transition: opacity 120ms ease, transform 120ms ease;
  }

  /* Open-state */
  .nav-mobile[open] .nav-mobile__panel{
    opacity: 1;
    transform: translateY(0) scale(1);
    pointer-events: auto;
  }

  /* Links inside the overlay */
  .nav-mobile__panel a{
    font-family: var(--mono);
    font-size: 12px;
    color: var(--text);

    padding: 10px 10px;
    border-radius: 12px;
    border: 1px solid transparent;
  }

  .nav-mobile__panel a:hover{
    border-color: var(--border);
    background: rgba(255,255,255,0.03);
    color: var(--accent);
  }

  .nav-mobile__panel a:focus{
    outline: 2px solid var(--accent-2);
    outline-offset: 2px;
  }

  /* Optional: slightly tighten brand block so it doesn't crowd */
  .brand{
    min-width: 0;
  }
}