:root {
  --bg:        #0a0d0f;
  --bg-alt:    #10171b;
  --panel:     #0e1316;   /* terminal body */
  --titlebar:  #12181b;
  --border:    #1d252a;
  --border-2:  #283238;
  --text:      #c4ccd2;
  --bright:    #eef3f5;
  --muted:     #707d86;
  --dim:       #4d5860;
  --green:     #6ee787;
  --green-dim: #4f9d68;
  --blue:      #7ab8ff;
  --amber:     #e3b341;
  --maxw: 1040px;
  --radius: 8px;
  --mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  --header-bg: rgba(10, 13, 15, 0.82);
  --panel-shadow: 0 30px 70px -30px rgba(0, 0, 0, 0.85);
  --vignette: radial-gradient(1200px 600px at 50% -10%, rgba(110, 231, 135, 0.05), transparent 70%);
}

/* ---------- Light theme ---------- */
[data-theme="light"] {
  --bg:        #f5f6f2;
  --bg-alt:    #eceee7;
  --panel:     #ffffff;
  --titlebar:  #eaece6;
  --border:    #dde1d8;
  --border-2:  #cad0c2;
  --text:      #39413a;
  --bright:    #11161a;
  --muted:     #69736b;
  --dim:       #97a094;
  --green:     #1f8a4c;
  --green-dim: #2f7d4a;
  --blue:      #1f6feb;
  --amber:     #b07d18;
  --header-bg: rgba(245, 246, 242, 0.85);
  --panel-shadow: 0 20px 50px -28px rgba(20, 34, 22, 0.30);
  --vignette: radial-gradient(1200px 600px at 50% -10%, rgba(31, 138, 76, 0.06), transparent 70%);
}
/* the logo mark is pure white art — flip it to dark on light backgrounds */
[data-theme="light"] .brand-mark,
[data-theme="light"] .term-icon { filter: invert(1); }
[data-theme="light"] .btn-primary { color: #f7fff9; }
[data-theme="light"] .btn-primary .sig { color: #f7fff9; }
[data-theme="light"] .btn-primary:hover { background: #1a7a43; border-color: #1a7a43; }

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--mono);
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  background-image: var(--vignette); /* faint phosphor vignette */
  transition: background-color .2s ease, color .2s ease;
}

.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
a { color: inherit; text-decoration: none; }

.comment { color: var(--green-dim); }
.path     { color: var(--blue); }
.dim      { color: var(--dim); }
.sig      { color: var(--green); margin-right: 2px; }

.skip-link {
  position: absolute; left: -9999px; top: 8px;
  background: var(--panel); color: var(--text);
  padding: 10px 16px; border: 1px solid var(--border); border-radius: 6px; z-index: 100;
}
.skip-link:focus { left: 16px; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 7px;
  font-family: var(--mono); font-weight: 600; font-size: 0.92rem;
  padding: 11px 18px; border-radius: 6px; border: 1px solid transparent;
  cursor: pointer; transition: background .15s ease, border-color .15s ease, color .15s ease, box-shadow .15s ease;
}
.btn-primary {
  background: var(--green); color: #08130c; border-color: var(--green);
}
.btn-primary .sig { color: #08130c; }
.btn-primary:hover { background: #8af09e; border-color: #8af09e; box-shadow: 0 0 0 3px rgba(110,231,135,0.18); }

.btn-ghost { background: transparent; color: var(--text); border-color: var(--border-2); }
.btn-ghost:hover { border-color: var(--green); color: var(--green); }
.btn-ghost:hover .sig { color: var(--green); }

.btn-sm { padding: 8px 13px; font-size: 0.85rem; border: 1px solid var(--border-2); }
.btn-sm:hover { border-color: var(--green); color: var(--green); }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: var(--header-bg);
  backdrop-filter: saturate(140%) blur(10px);
  -webkit-backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid var(--border);
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 60px; }
.brand { display: inline-flex; align-items: center; gap: 10px; }
.brand-mark { height: 24px; width: auto; display: block; }
.brand-text { font-weight: 700; font-size: 1.02rem; letter-spacing: -0.01em; color: var(--bright); }
.nav-links { display: flex; align-items: center; gap: 22px; }
.nav-links > a:not(.btn) { color: var(--muted); font-size: 0.92rem; transition: color .15s ease; }
.nav-links > a:not(.btn)::before { content: "./"; color: var(--dim); }
.nav-links > a:not(.btn):hover { color: var(--green); }

/* ---------- Eyebrow / headings ---------- */
.eyebrow { font-size: 0.85rem; color: var(--muted); margin: 0 0 18px; }
.hero-title, .section-head h2, .approach h2, .contact h2 {
  color: var(--bright); font-weight: 700; letter-spacing: -0.01em; word-spacing: -0.24em; margin: 0;
}

/* ---------- Hero ---------- */
.hero { padding: 28px 0 16px; }
.hero-title { font-size: clamp(1.85rem, 4.4vw, 2.9rem); line-height: 1.18; margin-bottom: 20px; }
.hero-sub { color: var(--muted); font-size: 1.02rem; margin: 0 0 34px; }

/* ---------- Terminal ---------- */
.terminal {
  border: 1px solid var(--border-2);
  border-radius: 10px;
  overflow: hidden;
  background: var(--panel);
  box-shadow: var(--panel-shadow);
  margin-bottom: 34px;
}
.term-bar {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 14px;
  background: var(--titlebar);
  border-bottom: 1px solid var(--border);
}
.term-icon { height: 16px; width: auto; opacity: 0.9; }
.term-title { color: var(--muted); font-size: 0.82rem; flex: 1; }
.term-dots { display: inline-flex; gap: 7px; }
.term-dots i { width: 11px; height: 11px; border-radius: 50%; background: var(--border-2); }
.term-dots i:nth-child(1) { background: #e35d5d; }
.term-dots i:nth-child(2) { background: #e3b341; }
.term-dots i:nth-child(3) { background: #6ee787; }

.term-body {
  padding: 20px 18px 22px;
  font-size: 0.92rem;
  line-height: 1.85;
  /* very subtle scanlines */
  background-image: repeating-linear-gradient(to bottom, transparent 0 3px, rgba(255,255,255,0.012) 3px 4px);
}
.term-body .line { color: var(--bright); white-space: pre-wrap; word-break: break-word; }
.term-body .out  { color: var(--text); padding-left: 0; }
.term-body .out.ls { color: var(--blue); }
.term-body .out a { color: var(--green); border-bottom: 1px solid rgba(110,231,135,0.35); }
.term-body .out a:hover { background: rgba(110,231,135,0.12); }
.term-body .out + .line { margin-top: 12px; }
.prompt { color: var(--green); }
.prompt .user { color: var(--green); }
.prompt .path { color: var(--blue); }

.cursor {
  display: inline-block; width: 9px; height: 1.05em;
  background: var(--green); vertical-align: text-bottom;
  animation: blink 1.05s steps(1) infinite;
}
@keyframes blink { 50% { opacity: 0; } }

.hero-cta { display: flex; flex-wrap: wrap; gap: 12px; }

/* ---------- Sections ---------- */
.section { padding: 28px 0 54px; }
.section-alt { background: var(--bg-alt); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.section-head { max-width: 620px; margin-bottom: 40px; }
.section-head h2, .approach h2, .contact h2 { font-size: clamp(1.5rem, 3.2vw, 2.1rem); margin-bottom: 12px; }
.section-lead { color: var(--muted); margin: 0; }

/* ---------- Service cards (file listing) ---------- */
.cards { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px 22px;
  transition: border-color .15s ease, transform .15s ease, box-shadow .15s ease;
}
.card:hover {
  border-color: var(--green-dim);
  transform: translateY(-3px);
  box-shadow: 0 16px 40px -22px rgba(0,0,0,0.8);
}
.card h3 {
  margin: 0 0 9px; font-size: 1.08rem; font-weight: 700; color: var(--green);
}
.card h3::before { content: "▸ "; color: var(--dim); }
.card h3 .ext { color: var(--blue); }
.card p { margin: 0; color: var(--muted); font-size: 0.92rem; }

/* ---------- Approach ---------- */
.approach { display: grid; grid-template-columns: 1fr; gap: 34px; align-items: start; }
.approach-copy p { color: var(--muted); }
.approach-copy .btn { margin-top: 10px; }

.config {
  border: 1px solid var(--border-2);
  border-radius: 10px;
  overflow: hidden;
  background: var(--panel);
  box-shadow: var(--panel-shadow);
}
.config-bar {
  padding: 9px 14px; background: var(--titlebar);
  border-bottom: 1px solid var(--border); font-size: 0.82rem;
}
.config-body {
  padding: 18px 16px 20px;
  font-family: var(--mono); font-size: 0.88rem; line-height: 1.8;
  color: var(--text);
}
.cfg-comment { color: var(--green-dim); margin-bottom: 1.1em; }
.cfg {
  display: grid;
  grid-template-columns: max-content max-content minmax(0, 1fr);
  column-gap: 0.9ch;
  row-gap: 0.45em;
  align-items: baseline;
}
.cfg .key { color: var(--blue); }
.cfg .eq  { color: var(--muted); }
.cfg .str { color: var(--green); word-break: break-word; }

/* ---------- Contact ---------- */
.contact-cmd {
  margin-top: 26px;
  display: inline-flex; align-items: center; gap: 8px; flex-wrap: wrap;
  background: var(--panel); border: 1px solid var(--border-2);
  border-radius: 8px; padding: 16px 18px; font-size: 1.02rem;
}
.contact-cmd a { color: var(--green); border-bottom: 1px solid rgba(110,231,135,0.4); }
.contact-cmd a:hover { background: rgba(110,231,135,0.12); }

/* ---------- Footer ---------- */
.site-footer { border-top: 1px solid var(--border); padding: 30px 0; }
.footer-inner { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 12px; font-size: 0.88rem; }
.footer-meta { display: inline-flex; align-items: center; gap: 14px; flex-wrap: wrap; }
.footer-meta a { color: var(--green); }
.theme-toggle {
  font-family: var(--mono); font-size: 0.72rem; color: var(--dim);
  background: transparent; border: 0; padding: 2px 0; cursor: pointer;
  transition: color .15s ease;
}
.theme-toggle:hover { color: var(--green); }
.theme-toggle #theme-name { color: inherit; }

/* ---------- Responsive ---------- */
@media (max-width: 760px) {
  .approach { grid-template-columns: 1fr; gap: 30px; }
  .cards { grid-template-columns: 1fr; }
}
@media (max-width: 600px) {
  body { font-size: 14px; }
  .nav-links > a:not(.btn) { display: none; }
  .hero { padding: 22px 0 12px; }
  .section { padding: 22px 0 42px; }
  .term-body { font-size: 0.82rem; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .cursor { animation: none; }
  .card:hover { transform: none; }
}