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

/* ── VARIABLES ── */
:root {
  --bg: #0a0c0f;
  --surface: #111418;
  --surface2: #181d23;
  --border: #1f2730;
  --green: #3ddc84;
  --cyan: #5dd8ff;
  --yellow: #f5c542;
  --red: #ff5f57;
  --orange: #ff8c42;
  --text: #cdd6e0;
  --muted: #4a5568;
  --bright: #eef2f7;
}

/* ── BODY ── */
html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'JetBrains Mono', monospace;
  min-height: 100vh;
  padding: 2rem 1rem 4rem;
  background-image:
    radial-gradient(ellipse 80% 50% at 50% -10%, rgba(61,220,132,0.07) 0%, transparent 60%),
    repeating-linear-gradient(0deg, transparent, transparent 39px, rgba(255,255,255,0.015) 40px),
    repeating-linear-gradient(90deg, transparent, transparent 39px, rgba(255,255,255,0.015) 40px);
}

.page {
  max-width: 860px;
  margin: 0 auto;
}

/* ── HEADER ── */
.header {
  text-align: center;
  padding: 3rem 0 2.5rem;
  position: relative;
}

.header::before {
  content: '';
  display: block;
  width: 1px;
  height: 3rem;
  background: linear-gradient(to bottom, transparent, var(--green));
  margin: 0 auto 1.5rem;
}

.badge {
  display: inline-block;
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--green);
  border: 1px solid rgba(61,220,132,0.3);
  padding: 0.3rem 1rem;
  border-radius: 2rem;
  margin-bottom: 1.2rem;
  animation: fadeDown 0.6s ease both;
}

.header h1 {
  font-family: 'Syne', sans-serif;
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 800;
  color: var(--bright);
  line-height: 1.1;
  letter-spacing: -0.02em;
  animation: fadeDown 0.6s 0.1s ease both;
}

.header h1 span { color: var(--green); }

.header p {
  margin-top: 0.9rem;
  color: var(--muted);
  font-size: 0.78rem;
  letter-spacing: 0.05em;
  animation: fadeDown 0.6s 0.2s ease both;
}

/* ── GRID ── */
.grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.2rem;
  margin-top: 2.5rem;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.4rem 1.6rem;
  position: relative;
  overflow: hidden;
  animation: fadeUp 0.5s ease both;
}

.card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
}

.card.green::before  { background: linear-gradient(90deg, var(--green), transparent); }
.card.cyan::before   { background: linear-gradient(90deg, var(--cyan), transparent); }
.card.yellow::before { background: linear-gradient(90deg, var(--yellow), transparent); }
.card.red::before    { background: linear-gradient(90deg, var(--red), transparent); }
.card.orange::before { background: linear-gradient(90deg, var(--orange), transparent); }

.card.wide { grid-column: 1 / -1; }

.card-label {
  font-size: 0.6rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  margin-bottom: 0.9rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.card.green  .card-label { color: var(--green); }
.card.cyan   .card-label { color: var(--cyan); }
.card.yellow .card-label { color: var(--yellow); }
.card.red    .card-label { color: var(--red); }
.card.orange .card-label { color: var(--orange); }

.card-label::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}

.card h2 {
  font-family: 'Syne', sans-serif;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--bright);
  margin-bottom: 1rem;
}

/* ── CODE BLOCK ── */
.code-block {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem 1.2rem;
  font-size: 0.72rem;
  line-height: 1.9;
}

.code-block .line { display: flex; align-items: flex-start; gap: 0.8rem; }
.code-block .ln   { color: var(--muted); min-width: 1.2rem; user-select: none; font-size: 0.65rem; padding-top: 0.05rem; }
.code-block .cmd  { color: var(--text); }
.code-block .comment { color: var(--muted); font-style: italic; }
.code-block .g { color: var(--green); }
.code-block .c { color: var(--cyan); }
.code-block .y { color: var(--yellow); }

/* ── STEPS ── */
.steps { display: flex; flex-direction: column; gap: 0.6rem; }

.step {
  display: flex;
  align-items: flex-start;
  gap: 0.8rem;
  padding: 0.55rem 0.8rem;
  background: var(--bg);
  border-radius: 7px;
  border: 1px solid var(--border);
  font-size: 0.73rem;
  transition: border-color 0.2s;
}
.step:hover { border-color: var(--green); }

.step-num {
  background: rgba(61,220,132,0.12);
  color: var(--green);
  border-radius: 5px;
  width: 1.4rem;
  height: 1.4rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.62rem;
  font-weight: 700;
  flex-shrink: 0;
}

.step-text { color: var(--text); line-height: 1.5; }
.step-text code {
  color: var(--cyan);
  background: rgba(93,216,255,0.08);
  padding: 0.1rem 0.35rem;
  border-radius: 3px;
  font-size: 0.68rem;
}

/* ── COMMIT LIST ── */
.commit-list { display: flex; flex-direction: column; gap: 0.5rem; }

.commit-row {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  padding: 0.5rem 0.8rem;
  background: var(--bg);
  border-radius: 7px;
  border: 1px solid var(--border);
  font-size: 0.72rem;
}

.tag {
  font-weight: 700;
  font-size: 0.68rem;
  padding: 0.15rem 0.55rem;
  border-radius: 4px;
  min-width: 4.5rem;
  text-align: center;
  flex-shrink: 0;
}
.tag.feat     { background: rgba(61,220,132,0.15);  color: var(--green); }
.tag.fix      { background: rgba(255,95,87,0.15);   color: var(--red); }
.tag.docs     { background: rgba(93,216,255,0.15);  color: var(--cyan); }
.tag.refactor { background: rgba(245,197,66,0.15);  color: var(--yellow); }
.tag.test     { background: rgba(255,140,66,0.15);  color: var(--orange); }
.tag.chore    { background: rgba(150,150,150,0.12); color: #aaa; }

.commit-desc { color: var(--muted); }

/* ── ENV SECTION ── */
.env-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.8rem;
}

.env-box {
  border-radius: 8px;
  padding: 0.9rem 1rem;
  font-size: 0.7rem;
  line-height: 1.8;
}
.env-box.bad  { background: rgba(255,95,87,0.08);  border: 1px solid rgba(255,95,87,0.2); }
.env-box.good { background: rgba(61,220,132,0.08); border: 1px solid rgba(61,220,132,0.2); }

.env-box .label {
  font-size: 0.6rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 0.6rem;
  font-weight: 700;
}
.env-box.bad  .label { color: var(--red); }
.env-box.good .label { color: var(--green); }

.env-box code { display: block; font-size: 0.68rem; }
.env-box.bad  code { color: #ff8f8a; }
.env-box.good code { color: #7ee8b0; }
.env-box .muted { color: var(--muted); font-style: italic; }

.rule-banner {
  margin-top: 1rem;
  background: rgba(255,95,87,0.07);
  border: 1px dashed rgba(255,95,87,0.35);
  border-radius: 7px;
  padding: 0.7rem 1rem;
  font-size: 0.7rem;
  color: var(--red);
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

/* ── FOOTER ── */
.footer {
  text-align: center;
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
  font-size: 0.65rem;
  color: var(--muted);
  letter-spacing: 0.08em;
}

.footer span {
  color: var(--green);
}

/* ── ANIMATIONS ── */
@keyframes fadeDown {
  from { opacity: 0; transform: translateY(-12px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

.card:nth-child(1) { animation-delay: 0.1s; }
.card:nth-child(2) { animation-delay: 0.15s; }
.card:nth-child(3) { animation-delay: 0.2s; }
.card:nth-child(4) { animation-delay: 0.25s; }

/* ── RESPONSIVE ── */
@media (max-width: 640px) {
  .grid     { grid-template-columns: 1fr; }
  .card.wide { grid-column: 1; }
  .env-split { grid-template-columns: 1fr; }
}