/* ============================================================
   AlterWays v3
   ============================================================ */

/* ============================================================
   Reset
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; }
a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); }
ul { list-style: none; }
button { font-family: inherit; cursor: pointer; }

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

/* ============================================================
   Tokens
   ============================================================ */
:root {
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;

  --bg:           #0d1117;
  --bg-surface:   #161b22;
  --bg-card:      #161b22;
  --bg-inset:     #090c12;

  --border:       #30363d;
  --border-muted: #21262d;

  --text:         #e6edf3;
  --text-muted:   #8b949e;
  --text-subtle:  #6e7681;

  --accent:       #58a6ff;
  --accent-hover: #79b8ff;
  --green:        #3fb950;
  --yellow:       #d29922;
  --red:          #f85149;
  --orange:       #e3693a;

  --nav-h: 56px;
  --gap: 24px;
  --r: 8px;
}

/* ============================================================
   Utility
   ============================================================ */
.t-ok      { color: var(--green); }
.t-warn    { color: var(--yellow); }
.t-err     { color: var(--red); }
.t-muted   { color: var(--text-muted); }
.t-dim     { color: var(--text-subtle); }
.t-prompt  { color: var(--green); user-select: none; }
.t-comment { color: var(--text-subtle); font-style: italic; }

/* ============================================================
   Layout
   ============================================================ */
.container {
  width: 100%;
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 var(--gap);
}
.container--mid  { max-width: 900px; }

/* ============================================================
   Header
   ============================================================ */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-h);
  background: rgba(13, 17, 23, .95);
  border-bottom: 1px solid var(--border-muted);
  backdrop-filter: blur(8px);
}

.header__inner {
  display: flex;
  align-items: center;
  gap: 32px;
  height: 100%;
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 var(--gap);
}

.logo {
  display: flex;
  align-items: center;
  gap: 9px;
  color: var(--text);
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: -0.01em;
  flex-shrink: 0;
  text-decoration: none;
}
.logo:hover { color: var(--text); text-decoration: none; }

.nav {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
}

.nav__link {
  padding: 6px 12px;
  border-radius: 6px;
  color: var(--text-muted);
  font-size: 0.875rem;
  font-family: var(--font-mono);
  transition: color .15s, background .15s;
}
.nav__link:hover {
  color: var(--text);
  background: var(--bg-surface);
  text-decoration: none;
}

.nav__burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  padding: 4px;
  margin-left: auto;
}
.nav__burger span {
  display: block;
  width: 20px;
  height: 1.5px;
  background: var(--text-muted);
  transition: transform .2s, opacity .2s;
}
.nav__burger.active span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav__burger.active span:nth-child(2) { opacity: 0; }
.nav__burger.active span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* ============================================================
   Terminal component
   ============================================================ */
.terminal {
  background: var(--bg-inset);
  border: 1px solid var(--border);
  border-radius: var(--r);
  overflow: hidden;
}

.terminal__bar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 10px 14px;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border-muted);
}

.terminal__dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--border);
  flex-shrink: 0;
}
.terminal__dot--red    { background: #f85149; }
.terminal__dot--yellow { background: #d29922; }
.terminal__dot--green  { background: #3fb950; }

.terminal__title {
  margin-left: 6px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-subtle);
}

.terminal__body {
  padding: 16px 20px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.8;
  color: var(--text);
  white-space: pre;
  overflow-x: auto;
}

.terminal--sm .terminal__body {
  padding: 12px 16px;
  font-size: 0.78rem;
  line-height: 1.75;
}

/* ============================================================
   Badges
   ============================================================ */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 9px;
  border-radius: 100px;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.03em;
  white-space: nowrap;
}
.badge--green  { background: rgba(63,185,80,.15);  color: var(--green);  border: 1px solid rgba(63,185,80,.3); }
.badge--yellow { background: rgba(210,153,34,.12); color: var(--yellow); border: 1px solid rgba(210,153,34,.3); }
.badge--dim    { background: transparent; color: var(--text-subtle); border: 1px solid var(--border); }

/* ============================================================
   Eyebrow
   ============================================================ */
.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-subtle);
  margin-bottom: 18px;
}

/* ============================================================
   Hero
   ============================================================ */
.hero {
  padding: 72px 0 64px;
  border-bottom: 1px solid var(--border-muted);
}

.hero__layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}

.hero__title {
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 700;
  color: var(--text);
  line-height: 1.2;
  letter-spacing: -0.025em;
  margin-bottom: 18px;
}

.hero__desc {
  font-size: 0.925rem;
  color: var(--text-muted);
  line-height: 1.75;
  margin-bottom: 24px;
  max-width: 480px;
}

.hero__badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

/* ============================================================
   Sections
   ============================================================ */
.section {
  padding: 64px 0;
  border-bottom: 1px solid var(--border-muted);
}
.section--alt { background: var(--bg-surface); }

.section-head {
  margin-bottom: 36px;
}

.section-title {
  font-size: 0.7rem;
  font-family: var(--font-mono);
  font-weight: 500;
  color: var(--text-subtle);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-muted);
  margin-bottom: 14px;
}

.section-sub {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.65;
}

/* ============================================================
   Tools grid
   ============================================================ */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border-muted);
  border: 1px solid var(--border-muted);
  border-radius: var(--r);
  overflow: hidden;
}

.tool {
  display: flex;
  flex-direction: column;
  background: var(--bg);
  padding: 24px;
  color: var(--text);
  text-decoration: none;
  transition: background .15s;
}
.tool:hover {
  background: rgba(88,166,255,.04);
  text-decoration: none;
}

.tool__meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.tool__name {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text);
  transition: color .15s;
}
.tool:hover .tool__name { color: var(--accent); }

.tool__tagline {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 10px;
  letter-spacing: -0.005em;
}

.tool__desc {
  font-size: 0.82rem;
  color: var(--text-subtle);
  line-height: 1.6;
  margin-bottom: 16px;
  flex: 1;
}

/* ============================================================
   About section
   ============================================================ */
.about {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 56px;
  align-items: start;
}

.principles {
  border: 1px solid var(--border-muted);
  border-radius: var(--r);
  overflow: hidden;
}

.principle {
  display: flex;
  gap: 16px;
  padding: 16px 20px;
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.65;
  border-bottom: 1px solid var(--border-muted);
}
.principle:last-child { border-bottom: none; }
.principle strong { color: var(--text); font-weight: 600; }
.principle code {
  font-family: var(--font-mono);
  font-size: 0.8em;
  background: var(--bg-inset);
  border: 1px solid var(--border);
  padding: 1px 6px;
  border-radius: 4px;
  color: var(--accent);
}

.principle__n {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-subtle);
  flex-shrink: 0;
  padding-top: 2px;
}

/* Stack card */
.stack-card {
  border: 1px solid var(--border-muted);
  border-radius: var(--r);
  overflow: hidden;
  margin-bottom: 16px;
}

.stack-card__head {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-subtle);
  letter-spacing: 0.08em;
  padding: 10px 16px;
  background: var(--bg-inset);
  border-bottom: 1px solid var(--border-muted);
  text-transform: uppercase;
}

.stack-card__body { }

.stack-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 16px;
  border-bottom: 1px solid var(--border-muted);
  font-family: var(--font-mono);
  font-size: 0.78rem;
}
.stack-row:last-child { border-bottom: none; }

.stack-row__key { color: var(--text-subtle); }
.stack-row__val { color: var(--text-muted); }

/* Community links */
.community-links {
  display: flex;
  flex-direction: column;
  gap: 1px;
  border: 1px solid var(--border-muted);
  border-radius: var(--r);
  overflow: hidden;
}

.comm-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  font-size: 0.85rem;
  color: var(--text-muted);
  background: var(--bg);
  border-bottom: 1px solid var(--border-muted);
  transition: background .15s, color .15s;
}
.comm-link:last-child { border-bottom: none; }
.comm-link:hover { background: var(--bg-surface); color: var(--text); text-decoration: none; }
.comm-link svg { width: 16px; height: 16px; flex-shrink: 0; color: var(--text-subtle); }

/* ============================================================
   Contact / Form
   ============================================================ */
.form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.form__row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form__group {
  display: flex;
  flex-direction: column;
  gap: 7px;
}

.form__label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
  letter-spacing: 0.04em;
}
.form__opt { color: var(--text-subtle); }

.form__input {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--r);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 0.875rem;
  padding: 10px 14px;
  outline: none;
  transition: border-color .15s;
  width: 100%;
}
.form__input:focus { border-color: var(--accent); }
.form__input::placeholder { color: var(--text-subtle); }

.form__select {
  appearance: none;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%238b949e' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 36px;
}

.form__textarea {
  resize: vertical;
  min-height: 120px;
  line-height: 1.6;
}

.form__footer {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}

.form__alt {
  font-size: 0.82rem;
  color: var(--text-subtle);
}
.form__alt a { color: var(--text-muted); }
.form__alt a:hover { color: var(--accent); }

/* ============================================================
   Button
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 20px;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--r);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  cursor: pointer;
  transition: border-color .15s, color .15s;
}
.btn:hover { border-color: var(--accent); color: var(--accent); }
.btn--sent { border-color: var(--green); color: var(--green); }

/* ============================================================
   Footer
   ============================================================ */
.footer { padding: 24px 0; }

.footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.footer__brand {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.footer__copy {
  font-size: 0.78rem;
  color: var(--text-subtle);
}

.footer__nav {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
}

.footer__nav a {
  padding: 4px 10px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-subtle);
  border-radius: 4px;
  transition: color .15s, background .15s;
}
.footer__nav a:hover {
  color: var(--text-muted);
  background: var(--bg-surface);
  text-decoration: none;
}

/* ============================================================
   Product pages
   ============================================================ */

/* Hero */
.product-hero {
  padding: 48px 0 56px;
  border-bottom: 1px solid var(--border-muted);
}

.product-hero__back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-subtle);
  margin-bottom: 28px;
  transition: color .15s;
}
.product-hero__back:hover { color: var(--text-muted); text-decoration: none; }
.product-hero__back svg { width: 14px; height: 14px; }

.product-hero__head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 10px;
}

.product-hero__name {
  font-family: var(--font-mono);
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.02em;
}

.product-hero__tagline {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 14px;
  letter-spacing: -0.01em;
}

.product-hero__desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  max-width: 640px;
  line-height: 1.75;
  margin-bottom: 20px;
}

.product-hero__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 28px;
}

/* Features grid */
.feat-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border-muted);
  border: 1px solid var(--border-muted);
  border-radius: var(--r);
  overflow: hidden;
}

.feat {
  background: var(--bg-surface);
  padding: 20px 22px;
}

.feat__title {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}

.feat__desc {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.65;
}

.feat__desc code {
  font-family: var(--font-mono);
  font-size: 0.8em;
  background: var(--bg-inset);
  border: 1px solid var(--border);
  padding: 1px 5px;
  border-radius: 3px;
  color: var(--accent);
}

/* Steps (how it works) */
.steps {
  border: 1px solid var(--border-muted);
  border-radius: var(--r);
  overflow: hidden;
  margin-top: 24px;
}

.step {
  display: flex;
  gap: 20px;
  align-items: baseline;
  padding: 18px 22px;
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.65;
  border-bottom: 1px solid var(--border-muted);
}
.step:last-child { border-bottom: none; }
.step strong { color: var(--text); }
.step code {
  font-family: var(--font-mono);
  font-size: 0.8em;
  background: var(--bg-inset);
  border: 1px solid var(--border);
  padding: 1px 6px;
  border-radius: 3px;
  color: var(--accent);
}

.step__n {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-subtle);
  flex-shrink: 0;
  width: 22px;
  padding-top: 2px;
}

/* Product CTA */
.product-cta__title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 10px;
  letter-spacing: -0.02em;
}

.product-cta__desc {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 20px;
  line-height: 1.65;
}

.product-cta__actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 1024px) {
  .tools-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .feat-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .hero__layout {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .about {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .about__right {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    align-items: start;
  }
}

@media (max-width: 640px) {
  .nav {
    display: none;
    position: fixed;
    inset: var(--nav-h) 0 0 0;
    background: var(--bg);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px 0;
    border-top: 1px solid var(--border-muted);
    z-index: 99;
  }
  .nav.open { display: flex; }
  .nav__link {
    padding: 14px var(--gap);
    border-radius: 0;
    border-bottom: 1px solid var(--border-muted);
    font-size: 0.9rem;
  }
  .nav__burger { display: flex; }

  .tools-grid { grid-template-columns: 1fr; }
  .feat-grid  { grid-template-columns: 1fr; }

  .form__row { grid-template-columns: 1fr; }

  .about__right { grid-template-columns: 1fr; }

  .footer__inner { flex-direction: column; align-items: flex-start; }
}