/* DevFreaks — landing page
   Palette: paper #FBFBF9 · ink #14161A · cobalt #2440D0 · diff-green #0E7A3D · diff-red #C03B2B */

:root {
  --paper: #FBFBF9;
  --ink: #14161A;
  --muted: #5C616B;
  --line: #E4E4DE;
  --cobalt: #2440D0;
  --cobalt-dark: #1B31A5;
  --green: #0E7A3D;
  --green-bg: #E4F3E9;
  --red: #C03B2B;
  --red-bg: #FAE9E6;
  --display: "Bricolage Grotesque", "Arial Black", sans-serif;
  --body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --pad: clamp(1.25rem, 5vw, 4rem);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--body);
  background: var(--paper);
  color: var(--ink);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

::selection { background: var(--cobalt); color: #fff; }

:focus-visible {
  outline: 2px solid var(--cobalt);
  outline-offset: 3px;
  border-radius: 2px;
}

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

.nav {
  display: flex;
  align-items: center;
  gap: 2rem;
  padding: 1.25rem var(--pad);
  border-bottom: 1px solid var(--line);
}

.wordmark {
  font-family: var(--mono);
  font-weight: 500;
  font-size: 1.1rem;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.wordmark.small { font-size: 0.95rem; }

.caret {
  color: var(--cobalt);
  animation: blink 1.1s steps(1) infinite;
}

@keyframes blink { 50% { opacity: 0; } }

.nav-links {
  display: flex;
  gap: 1.75rem;
  margin-left: auto;
}

.nav-links a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.95rem;
}

.nav-links a:hover { color: var(--ink); }

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

.btn {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.95rem;
  text-decoration: none;
  padding: 0.7rem 1.4rem;
  border-radius: 6px;
  border: 1px solid transparent;
  transition: background-color 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.btn-solid {
  background: var(--cobalt);
  color: #fff;
}

.btn-solid:hover { background: var(--cobalt-dark); }

.btn-ghost {
  color: var(--ink);
  border-color: var(--ink);
}

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

.btn-big {
  font-size: 1.1rem;
  padding: 1rem 2rem;
}

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

.hero {
  padding: clamp(4rem, 10vw, 7.5rem) var(--pad) clamp(4rem, 8vw, 6rem);
  max-width: 68rem;
}

.commit-line {
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--muted);
  margin-bottom: 2.25rem;
}

.commit-line .hash { color: var(--cobalt); }

.diff {
  font-family: var(--display);
  font-weight: 800;
  font-size: clamp(2rem, 6.5vw, 4.75rem);
  line-height: 1.12;
  letter-spacing: -0.02em;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.diff-line {
  display: flex;
  align-items: baseline;
  gap: clamp(0.6rem, 1.5vw, 1.25rem);
  padding: 0.1em 0.35em 0.1em 0.25em;
  border-radius: 8px;
  width: fit-content;
  max-width: 100%;
}

.gutter {
  font-family: var(--mono);
  font-weight: 400;
  font-size: 0.45em;
  flex: none;
  transform: translateY(-0.35em);
}

.diff-del {
  background: var(--red-bg);
  color: var(--red);
  font-weight: 500;
  font-size: 0.62em;
  animation: settle-del 0.5s ease-out 0.2s backwards;
}

.diff-del s { text-decoration-thickness: 2px; }

.diff-add {
  background: var(--green-bg);
  color: var(--green);
  animation: settle-add 0.6s cubic-bezier(0.2, 0.8, 0.3, 1) 0.75s backwards;
}

@keyframes settle-del {
  from { opacity: 0; }
}

@keyframes settle-add {
  from { opacity: 0; transform: translateY(0.4em); }
}

.hero-sub {
  max-width: 38rem;
  margin-top: 2.5rem;
  font-size: 1.125rem;
  color: var(--muted);
  animation: settle-del 0.6s ease-out 1.2s backwards;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 2.5rem;
  animation: settle-del 0.6s ease-out 1.35s backwards;
}

/* ---------- sections ---------- */

.section {
  padding: clamp(3.5rem, 8vw, 6rem) var(--pad);
  border-top: 1px solid var(--line);
}

.eyebrow {
  font-family: var(--mono);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--cobalt);
  margin-bottom: 0.75rem;
}

.section-title {
  font-family: var(--display);
  font-weight: 700;
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  letter-spacing: -0.015em;
  margin-bottom: 2.5rem;
}

/* cards */

.grid-cards {
  max-width: 68rem;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.card {
  background: var(--paper);
  padding: 1.75rem 1.5rem;
}

.card h3 {
  font-family: var(--display);
  font-weight: 700;
  font-size: 1.15rem;
  margin-bottom: 0.6rem;
}

.card p {
  color: var(--muted);
  font-size: 0.98rem;
}

/* steps */

.steps {
  max-width: 68rem;
  list-style: none;
  counter-reset: step;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
  gap: 2.5rem 2rem;
}

.steps li { counter-increment: step; }

.steps li::before {
  content: "0" counter(step);
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--cobalt);
  display: block;
  margin-bottom: 0.6rem;
}

.steps h3 {
  font-family: var(--display);
  font-weight: 700;
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
}

.steps p {
  color: var(--muted);
  font-size: 0.98rem;
}

/* principles */

.principles {
  list-style: none;
  max-width: 44rem;
}

.principles li {
  padding: 1.1rem 0 1.1rem 2.2rem;
  border-bottom: 1px solid var(--line);
  position: relative;
  font-size: 1.05rem;
}

.principles li:first-child { border-top: 1px solid var(--line); }

.principles li::before {
  content: "+";
  font-family: var(--mono);
  color: var(--green);
  position: absolute;
  left: 0.25rem;
}

/* ---------- cta ---------- */

.cta {
  border-top: 1px solid var(--line);
  padding: clamp(4rem, 9vw, 7rem) var(--pad);
  text-align: center;
}

.cta-title {
  font-family: var(--display);
  font-weight: 800;
  font-size: clamp(1.9rem, 4.5vw, 3.2rem);
  letter-spacing: -0.02em;
  margin-bottom: 0.75rem;
}

.cta-sub {
  color: var(--muted);
  max-width: 34rem;
  margin: 0 auto 2.25rem;
}

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

.footer {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 2rem;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem var(--pad) 2rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.85rem;
}

/* ---------- responsive & motion ---------- */

@media (max-width: 40rem) {
  .nav-links { display: none; }
  .nav { justify-content: space-between; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .caret,
  .diff-del,
  .diff-add,
  .hero-sub,
  .hero-actions {
    animation: none;
  }
}