/* Konklyn / MCPTerminal — site styles.
   Palette: electric-blue dark. Structural tokens live in tokens.css (linked first).
   Browser target: modern evergreen (last 2 Chrome/Edge/Firefox/Safari). */

/* ── Self-hosted Inter (latin subset, woff2, swap) ─────────────────────── */
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url('assets/fonts/inter-400.woff2') format('woff2');
}
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url('assets/fonts/inter-500.woff2') format('woff2');
}
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url('assets/fonts/inter-600.woff2') format('woff2');
}

/* ── Palette (locked) ───────────────────────────────────────────────────── */
:root {
  --bg: #0a0a0f;
  --surface: #12121a;
  --accent: #00c2ff;
  --text: #e8eaf0;
  --muted: #6b7280;

  --border: rgba(255, 255, 255, 0.06);
  --border-strong: rgba(255, 255, 255, 0.12);
  --ease: cubic-bezier(0.2, 0.6, 0.2, 1);
}

/* ── Reset / base ───────────────────────────────────────────────────────── */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

@media (prefers-reduced-motion: no-preference) {
  html {
    scroll-behavior: smooth;
  }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body.nav-open {
  overflow: hidden;
}

h1,
h2,
h3,
p {
  margin: 0;
}

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

ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

svg {
  display: block;
}

/* ── Layout helpers ─────────────────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: clamp(var(--space-3), 5vw, var(--space-5));
}

section {
  padding-block: clamp(var(--space-5), 8vw, var(--space-6));
  scroll-margin-top: calc(var(--nav-h) + var(--space-3));
}

.section-head {
  max-width: 48ch;
  margin-bottom: var(--space-5);
}

.section-head h2 {
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.01em;
}

.section-head p {
  margin-top: var(--space-3);
  color: var(--muted);
}

.eyebrow {
  display: inline-block;
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
}

/* ── Focus ring (global) ────────────────────────────────────────────────── */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: inherit;
}

/* ── Buttons ────────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  border: none;
  border-radius: var(--radius-sm);
  transition: filter 150ms var(--ease), box-shadow 150ms var(--ease),
    transform 150ms var(--ease);
}

.btn-primary {
  background: var(--accent);
  color: var(--bg);
  padding: var(--space-2) var(--space-4);
}

.btn-primary:hover {
  filter: brightness(1.08);
  box-shadow: 0 0 0 1px var(--accent), 0 4px 20px -6px var(--accent);
}

.btn-primary:active {
  transform: translateY(1px);
}

/* ── Wordmark ───────────────────────────────────────────────────────────── */
.wordmark {
  display: inline-flex;
  align-items: baseline;
  gap: var(--space-2);
  font-weight: 700;
  font-size: 1.125rem;
  letter-spacing: -0.01em;
}

.wordmark .dot {
  width: 0.6rem;
  height: 0.6rem;
  border-radius: 50%;
  background: var(--accent);
  align-self: center;
  box-shadow: 0 0 12px -2px var(--accent);
}

.wordmark .descriptor {
  font-weight: 400;
  font-size: 0.875rem;
  color: var(--muted);
}

/* ── Nav ────────────────────────────────────────────────────────────────── */
.nav {
  position: sticky;
  top: 0;
  z-index: var(--z-nav);
  height: var(--nav-h);
  background: color-mix(in srgb, var(--surface) 88%, transparent);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.nav-link {
  color: var(--text);
  font-size: 0.9375rem;
  transition: color 150ms var(--ease);
}

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

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  color: var(--text);
  cursor: pointer;
}

.nav-toggle .icon-close {
  display: none;
}

.nav-toggle[aria-expanded='true'] .icon-open {
  display: none;
}

.nav-toggle[aria-expanded='true'] .icon-close {
  display: block;
}

/* ── Hero ───────────────────────────────────────────────────────────────── */
.hero {
  position: relative;
  text-align: center;
  overflow: hidden;
}

.hero-inner {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
  max-width: 52rem;
  margin-inline: auto;
}

.hero h1 {
  position: relative;
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.02em;
}

.hero-sub {
  max-width: 42rem;
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  color: var(--muted);
}

.hero-glow {
  position: absolute;
  top: 30%;
  left: 50%;
  width: min(40rem, 80vw);
  height: 20rem;
  transform: translate(-50%, -50%);
  background: radial-gradient(
    50% 50% at 50% 50%,
    color-mix(in srgb, var(--accent) 12%, transparent),
    transparent 70%
  );
  filter: blur(40px);
  pointer-events: none;
  z-index: -1;
}

@media (prefers-reduced-motion: no-preference) {
  .hero-glow {
    animation: breathe 8s var(--ease) infinite;
  }
}

@keyframes breathe {
  0%,
  100% {
    opacity: 0.7;
  }
  50% {
    opacity: 1;
  }
}

/* ── Card grids ─────────────────────────────────────────────────────────── */
.grid {
  display: grid;
  gap: var(--space-4);
}

.grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

@media (max-width: 1024px) {
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 720px) {
  .grid-3 {
    grid-template-columns: 1fr;
  }
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--space-4);
  transition: border-color 180ms var(--ease), transform 180ms var(--ease);
}

.card:hover,
.card:focus-within {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.card .icon {
  width: 24px;
  height: 24px;
  color: var(--accent);
  margin-bottom: var(--space-3);
}

.card h3 {
  font-size: 1.25rem;
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: -0.01em;
  margin-bottom: var(--space-2);
}

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

/* ── How it works — steps ───────────────────────────────────────────────── */
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
}

.step {
  position: relative;
  padding-inline: var(--space-2);
}

.step-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.75rem;
  height: 2.75rem;
  border-radius: 50%;
  background: color-mix(in srgb, var(--accent) 14%, transparent);
  border: 1px solid var(--accent);
  color: var(--accent);
  font-weight: 700;
  font-size: 1.125rem;
  margin-bottom: var(--space-3);
}

.step h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: var(--space-2);
}

.step p {
  color: var(--muted);
}

/* Desktop connector arrow between steps */
.step:not(:last-child)::after {
  content: '▶';
  position: absolute;
  top: 1.1rem;
  right: calc(var(--space-2) * -1);
  transform: translateX(50%);
  color: color-mix(in srgb, var(--accent) 40%, transparent);
  font-size: 0.75rem;
}

@media (max-width: 720px) {
  .steps {
    grid-template-columns: 1fr;
    gap: var(--space-5);
  }
  .step:not(:last-child)::after {
    content: '';
    top: 2.75rem;
    bottom: calc(var(--space-5) * -1);
    left: 1.375rem;
    right: auto;
    width: 1px;
    transform: none;
    background: color-mix(in srgb, var(--accent) 40%, transparent);
  }
}

/* ── Footer ─────────────────────────────────────────────────────────────── */
.footer {
  border-top: 1px solid color-mix(in srgb, var(--accent) 20%, transparent);
  padding-block: var(--space-5);
}

.footer-inner {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-3);
  color: var(--muted);
  font-size: 0.9375rem;
}

.footer-legal a {
  color: var(--muted);
  transition: color 150ms var(--ease);
}

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

.footer-sep {
  color: var(--border-strong);
}

/* ── Mobile nav ─────────────────────────────────────────────────────────── */
@media (max-width: 720px) {
  .nav-toggle {
    display: inline-flex;
  }

  .nav-links {
    position: fixed;
    top: var(--nav-h);
    left: 0;
    right: 0;
    z-index: var(--z-overlay);
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-3);
    padding: var(--space-4);
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    transform: translateY(-8px);
    opacity: 0;
    visibility: hidden;
    transition: opacity 200ms var(--ease), transform 200ms var(--ease),
      visibility 200ms var(--ease);
  }

  .nav-links.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav-link {
    padding-block: var(--space-2);
    font-size: 1.0625rem;
  }

  .nav-links .btn-primary {
    justify-content: center;
    width: 100%;
    padding-block: var(--space-3);
  }

  .footer-inner {
    align-items: center;
    text-align: center;
  }

  .footer-legal {
    justify-content: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .nav-links {
    transition: none;
  }
}