/* mkdn marketing site — Solarized palette */

:root {
  --base03:  #002b36;
  --base02:  #073642;
  --base01:  #586e75;
  --base00:  #657b83;
  --base0:   #839496;
  --base1:   #93a1a1;
  --base2:   #eee8d5;
  --base3:   #fdf6e3;
  --yellow:  #b58900;
  --orange:  #cb4b16;
  --red:     #dc322f;
  --magenta: #d33682;
  --violet:  #6c71c4;
  --blue:    #268bd2;
  --cyan:    #2aa198;
  --green:   #859900;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", sans-serif;
  background: var(--base03);
  color: var(--base1);
  line-height: 1.6;
}

/* ── Accessibility ── */

.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  padding: 0.5rem 1rem;
  background: var(--cyan);
  color: var(--base03);
  border-radius: 0 0 4px 4px;
  z-index: 100;
  font-size: 0.85rem;
  font-weight: 500;
  text-decoration: none;
}

.skip-link:focus {
  top: 0;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ── Layout ── */

.container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 2rem;
}

section {
  padding: 5rem 0;
}

/* ── Hero ── */

.hero {
  text-align: center;
  padding: 6rem 0 4rem;
}

@keyframes orb-pulse {
  0%, 100% { filter: drop-shadow(0 0 40px rgba(42, 161, 152, 0.25)); }
  50%      { filter: drop-shadow(0 0 60px rgba(42, 161, 152, 0.5)); }
}

.hero-icon {
  width: 180px;
  height: 180px;
  border-radius: 36px;
  animation: orb-pulse 5s ease-in-out infinite;
  margin-bottom: 2rem;
}

.hero h1 {
  font-size: 3.5rem;
  font-weight: 700;
  color: var(--base3);
  letter-spacing: -0.02em;
  margin-bottom: 0.5rem;
}

.hero .tagline {
  font-size: 1.35rem;
  color: var(--base0);
  font-weight: 400;
  margin-bottom: 2.5rem;
  max-width: 520px;
  margin-left: auto;
  margin-right: auto;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 500;
  text-decoration: none;
  transition: all 0.2s ease;
}

.btn-primary {
  background: var(--cyan);
  color: var(--base03);
}

.btn-primary:hover {
  background: #35b5ac;
  transform: translateY(-1px);
}

.btn-secondary {
  background: var(--base02);
  color: var(--base1);
  border: 1px solid var(--base01);
}

.btn-secondary:hover {
  background: var(--base01);
  color: var(--base3);
  transform: translateY(-1px);
}

.btn:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.btn:active {
  transform: translateY(0);
}

/* ── Screenshot showcase ── */

.showcase {
  text-align: center;
  padding: 2rem 0 5rem;
}

.showcase-frame {
  position: relative;
  max-width: 960px;
  margin: 0 auto;
  border-radius: 12px;
  box-shadow:
    0 4px 6px rgba(0, 0, 0, 0.3),
    0 20px 60px rgba(0, 0, 0, 0.4),
    0 0 80px rgba(42, 161, 152, 0.08);
}

.showcase-frame img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 12px;
}

@keyframes orb-glow {
  0%, 100% { box-shadow: 0 0 15px 5px rgba(108, 113, 196, 0.4); }
  50%      { box-shadow: 0 0 25px 8px rgba(108, 113, 196, 0.7); }
}

.showcase-frame::after {
  content: "";
  position: absolute;
  bottom: 16px;
  right: 16px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(108, 113, 196, 0.9), rgba(108, 113, 196, 0.3));
  animation: orb-glow 6s ease-in-out infinite;
  pointer-events: none;
  z-index: 1;
}

/* ── Philosophy strip ── */

.philosophy {
  border-top: 1px solid var(--base02);
  border-bottom: 1px solid var(--base02);
  padding: 4rem 0;
}

.philosophy-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 3rem;
  text-align: center;
}

.philosophy-item h3 {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--base3);
  margin-bottom: 0.5rem;
}

.philosophy-item p {
  font-size: 0.95rem;
  color: var(--base00);
  line-height: 1.5;
}

.philosophy-item .accent {
  color: var(--cyan);
}

/* ── Features grid ── */

.features {
  padding: 5rem 0;
}

.features h2 {
  text-align: center;
  font-size: 2rem;
  font-weight: 600;
  color: var(--base3);
  margin-bottom: 3rem;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.feature-card {
  background: var(--base02);
  border: 1px solid rgba(147, 161, 161, 0.08);
  border-radius: 12px;
  padding: 1.75rem;
  transition: border-color 0.2s ease;
}

.feature-card:hover {
  border-color: rgba(42, 161, 152, 0.3);
}

.feature-card h3 {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--base3);
  margin-bottom: 0.5rem;
}

.feature-card p {
  font-size: 0.9rem;
  color: var(--base00);
  line-height: 1.5;
}

/* ── Theme showcase ── */

.themes {
  padding: 4rem 0;
  text-align: center;
}

.themes h2 {
  font-size: 2rem;
  font-weight: 600;
  color: var(--base3);
  margin-bottom: 1rem;
}

.themes p {
  color: var(--base00);
  margin-bottom: 2.5rem;
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
}

.themes-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
  max-width: 960px;
  margin: 0 auto;
}

.theme-preview {
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3);
}

.theme-preview img {
  width: 100%;
  height: auto;
  display: block;
}

.theme-label {
  font-size: 0.85rem;
  color: var(--base00);
  margin-top: 0.75rem;
  text-align: center;
}

/* ── Install ── */

.install {
  border-top: 1px solid var(--base02);
  padding: 5rem 0;
  text-align: center;
}

.install h2 {
  font-size: 2rem;
  font-weight: 600;
  color: var(--base3);
  margin-bottom: 1rem;
}

.install > .container > p {
  color: var(--base00);
  margin-bottom: 2rem;
}

.install-methods {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  max-width: 600px;
  margin: 0 auto;
}

.install-label {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--base00);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  display: block;
  margin-bottom: 0.5rem;
}

.install-code {
  position: relative;
  background: var(--base02);
  border: 1px solid rgba(147, 161, 161, 0.1);
  border-radius: 8px;
  padding: 1rem 1.25rem;
  font-family: "SF Mono", "Fira Code", "Menlo", monospace;
  font-size: 0.9rem;
  color: var(--cyan);
  text-align: left;
  user-select: all;
  margin: 0;
  overflow-x: auto;
}

.install-code::after {
  content: "click to select";
  position: absolute;
  right: 0.75rem;
  top: 50%;
  transform: translateY(-50%);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", sans-serif;
  font-size: 0.7rem;
  color: var(--base01);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.2s;
}

.install-code:hover::after {
  opacity: 1;
}

/* ── Footer ── */

.footer {
  border-top: 1px solid var(--base02);
  padding: 2.5rem 0;
  text-align: center;
}

.footer p {
  font-size: 0.85rem;
  color: var(--base00);
}

.footer a {
  color: var(--base0);
  text-decoration: none;
}

.footer a:hover,
.footer a:focus-visible {
  color: var(--cyan);
}

/* ── Responsive ── */

@media (max-width: 768px) {
  .hero {
    padding: 4rem 0 3rem;
  }

  .hero-icon {
    width: 120px;
    height: 120px;
    border-radius: 24px;
  }

  .hero h1 {
    font-size: 2.5rem;
  }

  .hero .tagline {
    font-size: 1.1rem;
  }

  .philosophy-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .features-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .showcase-frame::after {
    display: none;
  }

  .themes-row {
    grid-template-columns: 1fr;
  }

  section {
    padding: 3rem 0;
  }

  .container {
    padding: 0 1.25rem;
  }
}

@media (max-width: 480px) {
  .hero h1 {
    font-size: 2rem;
  }

  .hero .tagline {
    font-size: 1rem;
  }

  .hero-actions {
    flex-direction: column;
    align-items: center;
  }
}