/* ==========================================================================
   Dev Buddy — landing page styles
   Dark, high-contrast, neon-accented dev-tool aesthetic.
   ========================================================================== */

:root {
  --bg: #08090c;
  --bg-elevated: #101218;
  --bg-card: #12141b;
  --border: #23262f;
  --border-soft: #1a1c24;
  --text: #eef0f5;
  --text-dim: #9aa0ae;
  --text-faint: #666c7a;

  --accent: #7dffe3;
  --accent-2: #8a7dff;
  --accent-glow: rgba(125, 255, 227, 0.35);
  --accent-glow-strong: rgba(125, 255, 227, 0.55);

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;

  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: "JetBrains Mono", "Fira Code", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --container-w: 1160px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

img, svg {
  display: block;
  max-width: 100%;
}

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

.container {
  width: 100%;
  max-width: var(--container-w);
  margin-inline: auto;
  padding-inline: 24px;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--accent);
  color: #04140f;
  padding: 10px 16px;
  border-radius: 0 0 8px 0;
  z-index: 100;
  font-weight: 600;
}
.skip-link:focus {
  left: 0;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
}

/* ---------- buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 24px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease, border-color 0.15s ease;
  white-space: nowrap;
}

.btn-icon {
  width: 16px;
  height: 16px;
  transition: transform 0.15s ease;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #04140f;
  box-shadow: 0 0 0 1px rgba(125, 255, 227, 0.15), 0 8px 30px -8px var(--accent-glow-strong);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 0 1px rgba(125, 255, 227, 0.25), 0 14px 36px -8px var(--accent-glow-strong);
}
.btn-primary:hover .btn-icon {
  transform: translateX(3px);
}

.btn-secondary {
  background: transparent;
  color: var(--text);
  border-color: var(--border);
}
.btn-secondary:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
}

/* ---------- header / nav ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(8, 9, 12, 0.75);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-soft);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: -0.01em;
}

.brand-mark {
  width: 22px;
  height: 22px;
  border-radius: 6px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 0 16px var(--accent-glow);
  flex-shrink: 0;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 28px;
  font-size: 0.92rem;
  color: var(--text-dim);
}

.site-nav a {
  transition: color 0.15s ease;
}
.site-nav a:hover {
  color: var(--text);
}

.nav-cta {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 9px 16px;
  border-radius: var(--radius-sm);
  font-weight: 600;
}
.nav-cta:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.nav-toggle,
.nav-burger {
  display: none;
}

/* ---------- hero ---------- */

.hero {
  position: relative;
  overflow: hidden;
  padding: 120px 0 100px;
  text-align: center;
}

.hero-glow {
  position: absolute;
  top: -220px;
  left: 50%;
  translate: -50% 0;
  width: 900px;
  height: 560px;
  background: radial-gradient(closest-side, var(--accent-glow), transparent 70%);
  filter: blur(10px);
  pointer-events: none;
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, var(--border-soft) 1px, transparent 1px),
    linear-gradient(to bottom, var(--border-soft) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 0%, black 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 0%, black 30%, transparent 75%);
  pointer-events: none;
}

.hero-inner {
  position: relative;
  z-index: 1;
  max-width: 760px;
}

.hero h1 {
  font-size: clamp(2.4rem, 5.5vw, 4rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.08;
  margin-bottom: 22px;
}

.text-glow {
  color: var(--accent);
  text-shadow: 0 0 40px var(--accent-glow-strong);
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-dim);
  max-width: 560px;
  margin: 0 auto 36px;
}

.hero-ctas {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
}

.hero-meta {
  margin-top: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
  font-size: 0.88rem;
  color: var(--text-faint);
}
.hero-meta strong {
  color: var(--text-dim);
}
.hero-meta .dot {
  opacity: 0.5;
}

/* ---------- section heads ---------- */

.section-head {
  text-align: center;
  max-width: 620px;
  margin: 0 auto 56px;
}

.section-head h2 {
  font-size: clamp(1.7rem, 3.4vw, 2.4rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 14px;
}

.section-sub {
  color: var(--text-dim);
  font-size: 1.02rem;
}

/* ---------- features ---------- */

.features {
  padding: 100px 0;
  border-top: 1px solid var(--border-soft);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 30px 26px;
  transition: border-color 0.2s ease, transform 0.2s ease, background 0.2s ease;
}

.feature-card:hover {
  border-color: rgba(125, 255, 227, 0.4);
  transform: translateY(-3px);
  background: #14161e;
}

.feature-icon {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  color: var(--accent);
  margin-bottom: 20px;
}

.feature-icon svg {
  width: 22px;
  height: 22px;
}

.feature-card h3 {
  font-size: 1.08rem;
  font-weight: 700;
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}

.feature-card p {
  color: var(--text-dim);
  font-size: 0.95rem;
}

/* ---------- quick start ---------- */

.quickstart {
  padding: 100px 0;
  border-top: 1px solid var(--border-soft);
  background: linear-gradient(to bottom, transparent, rgba(125, 255, 227, 0.02));
}

.qs-steps {
  display: flex;
  flex-direction: column;
  gap: 14px;
  max-width: 760px;
  margin: 0 auto;
}

.qs-block {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.qs-block summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px 24px;
  user-select: none;
}

.qs-block summary::-webkit-details-marker {
  display: none;
}

.qs-step-num {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent);
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  border-radius: 6px;
  padding: 4px 8px;
  flex-shrink: 0;
}

.qs-step-title {
  font-weight: 600;
  flex: 1;
}

.qs-chevron {
  width: 18px;
  height: 18px;
  color: var(--text-faint);
  transition: transform 0.2s ease;
  flex-shrink: 0;
}

.qs-block[open] .qs-chevron {
  transform: rotate(180deg);
  color: var(--accent);
}

.qs-block[open] summary {
  border-bottom: 1px solid var(--border);
}

.qs-body {
  padding: 20px 24px 26px;
}

.qs-body p {
  color: var(--text-dim);
  margin-bottom: 16px;
  font-size: 0.95rem;
}

.code-block {
  font-family: var(--font-mono);
  font-size: 0.87rem;
  line-height: 1.7;
  background: #0a0b0f;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 18px 20px;
  overflow-x: auto;
  color: #d3d7e0;
}

.code-block code {
  font-family: inherit;
  white-space: pre;
}

.c-comment { color: var(--text-faint); }
.c-kw { color: var(--accent-2); }
.c-string { color: var(--accent); }

/* ---------- CTA strip ---------- */

.cta-strip {
  padding: 90px 0;
  border-top: 1px solid var(--border-soft);
  text-align: center;
}

.cta-strip-inner h2 {
  font-size: clamp(1.6rem, 3.2vw, 2.2rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 30px;
}

/* ---------- footer ---------- */

.site-footer {
  border-top: 1px solid var(--border-soft);
  padding-top: 64px;
  background: var(--bg-elevated);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 48px;
  flex-wrap: wrap;
  padding-bottom: 48px;
}

.footer-brand {
  max-width: 300px;
}

.footer-brand .brand-mark {
  margin-bottom: 14px;
}

.footer-brand .brand-name {
  display: block;
  font-weight: 700;
  margin-bottom: 10px;
}

.footer-brand p {
  color: var(--text-faint);
  font-size: 0.9rem;
}

.footer-brand a {
  color: var(--text-dim);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.footer-links {
  display: flex;
  gap: 56px;
  flex-wrap: wrap;
}

.footer-col h4 {
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-faint);
  margin-bottom: 16px;
}

.footer-col a {
  display: block;
  color: var(--text-dim);
  font-size: 0.92rem;
  margin-bottom: 12px;
  transition: color 0.15s ease;
}
.footer-col a:hover {
  color: var(--accent);
}

.footer-bottom {
  border-top: 1px solid var(--border-soft);
  padding: 22px 24px;
  text-align: center;
  color: var(--text-faint);
  font-size: 0.85rem;
}

/* ==========================================================================
   Responsive
   ========================================================================== */

@media (max-width: 900px) {
  .feature-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 720px) {
  .header-inner {
    height: 60px;
  }

  .nav-burger {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 32px;
    height: 32px;
    cursor: pointer;
    z-index: 60;
  }
  .nav-burger span {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--text);
    border-radius: 2px;
    transition: transform 0.2s ease, opacity 0.2s ease;
  }

  .site-nav {
    position: fixed;
    inset: 60px 0 0 0;
    background: var(--bg);
    flex-direction: column;
    align-items: flex-start;
    padding: 32px 24px;
    gap: 22px;
    font-size: 1.1rem;
    transform: translateX(100%);
    transition: transform 0.25s ease;
  }

  .nav-toggle:checked ~ .site-nav {
    transform: translateX(0);
  }

  .nav-toggle:checked ~ .nav-burger span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }
  .nav-toggle:checked ~ .nav-burger span:nth-child(2) {
    opacity: 0;
  }
  .nav-toggle:checked ~ .nav-burger span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  .hero {
    padding: 90px 0 70px;
  }

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

  .footer-inner {
    flex-direction: column;
    gap: 36px;
  }
}

@media (max-width: 480px) {
  .hero-ctas .btn {
    width: 100%;
    justify-content: center;
  }
}