/* ==========================================================================
   Vincent Sotto — Automation Portfolio
   Design system: "systems schematic" — blueprint grid, amber signal current,
   teal data/state accent, mono-labelled nodes. See README for rationale.
   ========================================================================== */

:root {
  /* ---- Color tokens ---- */
  --bg: #0a0d10;
  --bg-panel: #12161b;
  --bg-panel-raised: #161b21;
  --grid-line: rgba(255, 255, 255, 0.045);
  --border: #232a31;
  --border-strong: #333c44;
  --text: #e7ecef;
  --text-muted: #8996a3;
  --text-faint: #57626d;
  --signal: #ffb020;       /* amber — the current running through the system */
  --signal-dim: #7a5a1e;
  --signal-wash: rgba(255, 176, 32, 0.1);
  --data: #4fd1c5;         /* teal — settled state / secondary path */
  --data-wash: rgba(79, 209, 197, 0.1);
  --urgent: #ff6b6b;

  /* ---- Type ---- */
  --font-display: "Space Grotesk", "IBM Plex Sans", system-ui, sans-serif;
  --font-body: "IBM Plex Sans", system-ui, -apple-system, sans-serif;
  --font-mono: "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;

  /* ---- Layout ---- */
  --content-w: 1120px;
  --gutter: clamp(20px, 5vw, 56px);
  --radius: 8px;
  --radius-sm: 4px;
}

/* ---- Reset ---- */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* Blueprint grid background */
body {
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 40px 40px;
  background-position: center top;
}

img, svg { max-width: 100%; }
a { color: inherit; }
h1, h2, h3, h4 { font-family: var(--font-display); margin: 0; font-weight: 600; letter-spacing: -0.01em; }
p { margin: 0; }
ul { margin: 0; padding: 0; list-style: none; }
button { font: inherit; }

.wrap {
  max-width: var(--content-w);
  margin: 0 auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

/* visually-hidden but accessible */
.vh {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--signal);
  color: #0a0d10;
  padding: 10px 16px;
  z-index: 1000;
  font-family: var(--font-mono);
  font-size: 13px;
}
.skip-link:focus { left: var(--gutter); top: 12px; }

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

/* ---- Nav ---- */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid transparent;
  transition: border-color .3s ease, background-color .3s ease;
}
.nav.is-scrolled {
  background: rgba(10, 13, 16, 0.85);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom-color: var(--border);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 20px;
  padding-bottom: 20px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 14.5px;
  text-decoration: none;
  color: var(--text);
  white-space: nowrap;
}
.logo .dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--signal);
  box-shadow: 0 0 8px var(--signal);
  flex-shrink: 0;
}
.logo .muted { color: var(--text-muted); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}
.nav-links a {
  font-family: var(--font-mono);
  font-size: 13px;
  text-decoration: none;
  color: var(--text-muted);
  letter-spacing: 0.02em;
  transition: color .2s ease;
}
.nav-links a:hover { color: var(--text); }

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--bg);
  background: var(--signal);
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: filter .2s ease, transform .2s ease;
}
.nav-cta:hover { filter: brightness(1.1); transform: translateY(-1px); }

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border);
  color: var(--text);
  width: 38px; height: 38px;
  border-radius: var(--radius-sm);
  align-items: center;
  justify-content: center;
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 13.5px;
  text-decoration: none;
  padding: 13px 20px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-strong);
  color: var(--text);
  background: transparent;
  cursor: pointer;
  transition: border-color .2s ease, background-color .2s ease, transform .2s ease;
}
.btn:hover { border-color: var(--signal); background: var(--signal-wash); transform: translateY(-1px); }
.btn-primary {
  background: var(--signal);
  color: #0a0d10;
  border-color: var(--signal);
  font-weight: 500;
}
.btn-primary:hover { filter: brightness(1.08); background: var(--signal); }

/* ---- Section scaffolding ---- */
section { padding: 96px 0; border-bottom: 1px solid var(--border); }
section:last-of-type { border-bottom: none; }

.eyebrow {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 18px;
}
.eyebrow .port-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--signal);
  box-shadow: 0 0 8px var(--signal-wash);
  flex-shrink: 0;
}
.eyebrow span {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.12em;
  color: var(--text-muted);
  text-transform: uppercase;
  white-space: nowrap;
}
.eyebrow .rule {
  flex: 1;
  border-top: 1px dashed var(--border-strong);
}

.section-head { max-width: 640px; margin-bottom: 48px; }
.section-title { font-size: clamp(28px, 3.4vw, 38px); margin-bottom: 14px; }
.section-lede { color: var(--text-muted); font-size: 16.5px; max-width: 60ch; }

/* ---- Hero ---- */
.hero { padding-top: 64px; padding-bottom: 80px; }
.hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
}
.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.1em;
  color: var(--signal);
  text-transform: uppercase;
  margin-bottom: 22px;
}
.hero-eyebrow .dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--signal);
  animation: blink 2s ease-in-out infinite;
}
@media (prefers-reduced-motion: reduce) { .hero-eyebrow .dot { animation: none; } }
@keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: .35; } }

.hero h1 {
  font-size: clamp(34px, 5.4vw, 58px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  max-width: 16ch;
  margin-bottom: 24px;
}
.hero-sub {
  font-size: 18px;
  color: var(--text-muted);
  max-width: 54ch;
  margin-bottom: 34px;
}
.hero-sub strong { color: var(--text); font-weight: 500; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }

.hero-diagram-wrap { margin-top: 8px; }
.hero-diagram-caption,
.case-diagram-caption {
  display: flex;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-faint);
  margin-top: 10px;
  letter-spacing: .02em;
}

/* ---- Diagrams (shared across hero + case studies) ---- */
.diagram { width: 100%; height: auto; display: block; overflow: visible; }
.diagram .node rect {
  fill: var(--bg-panel);
  stroke: var(--border-strong);
  stroke-width: 1;
}
.diagram .node text {
  font-family: var(--font-mono);
  font-size: 10.5px;
  fill: var(--text);
}
.diagram .node .sub { fill: var(--text-muted); font-size: 10px; }
.diagram .port { fill: var(--signal); }
.diagram .port-data { fill: var(--data); }
.diagram .port-urgent { fill: var(--urgent); }
.diagram .edge-flow {
  fill: none;
  stroke: var(--signal);
  stroke-width: 1.5;
  stroke-dasharray: 6 7;
  animation: flow 900ms linear infinite;
}
.diagram .edge-flow-data { stroke: var(--data); }
.diagram .edge-flow-urgent { stroke: var(--urgent); }
.diagram .edge-loop {
  fill: none;
  stroke: var(--text-faint);
  stroke-width: 1.2;
  stroke-dasharray: 3 4;
  opacity: .9;
}
.diagram .annot {
  font-family: var(--font-mono);
  font-size: 9.5px;
  fill: var(--text-faint);
}
@keyframes flow { to { stroke-dashoffset: -26; } }
@media (prefers-reduced-motion: reduce) {
  .diagram .edge-flow { animation: none; }
}

/* ---- What I Do ---- */
.services-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
}
.service {
  background: var(--bg);
  padding: 28px 30px;
  position: relative;
}
.service-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--signal);
  letter-spacing: .04em;
  margin-bottom: 12px;
  display: block;
}
.service h3 {
  font-size: 17px;
  margin-bottom: 8px;
  font-weight: 600;
}
.service p {
  color: var(--text-muted);
  font-size: 14.5px;
  line-height: 1.6;
}

/* ---- Case studies ---- */
.case {
  padding: 40px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-panel);
  margin-bottom: 28px;
}
.case:last-child { margin-bottom: 0; }
.case-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 20px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}
.case-status {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--signal);
  border: 1px solid var(--signal-dim);
  background: var(--signal-wash);
  padding: 5px 10px;
  border-radius: 20px;
  white-space: nowrap;
}
.case-status .dot { width: 5px; height: 5px; border-radius: 50%; background: var(--signal); }
.case-title { font-size: clamp(20px, 2.4vw, 25px); max-width: 46ch; }
.case-stack { font-family: var(--font-mono); font-size: 12px; color: var(--text-muted); margin-top: 6px; }

.case-diagram { margin: 28px 0; padding: 24px 20px; background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius-sm); }
.diagram-link { display: block; border-radius: var(--radius-sm); overflow: hidden; }
.diagram-img {
  width: 100%;
  height: auto;
  display: block;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: border-color .2s ease, opacity .2s ease;
}
.diagram-link:hover .diagram-img { border-color: var(--signal-dim); opacity: .92; }

/* ---- Case diagram gallery (multiple screenshots per project) ---- */
.case-gallery { position: relative; }
.gallery-slide { display: none; }
.gallery-slide.is-active { display: block; }
.gallery-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 34px;
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border-strong);
  border-radius: 50%;
  background: rgba(10, 13, 16, 0.78);
  color: var(--text);
  cursor: pointer;
  padding: 0;
  z-index: 2;
  transition: border-color .2s ease, color .2s ease, background-color .2s ease;
}
.gallery-nav svg { width: 14px; height: 14px; }
.gallery-nav:hover { border-color: var(--signal); color: var(--signal); background: rgba(10, 13, 16, 0.92); }
.gallery-nav[hidden] { display: none; }
.gallery-prev { left: 10px; }
.gallery-next { right: 10px; }
.gallery-dots { display: flex; justify-content: center; gap: 7px; margin-top: 14px; }
.gallery-dots[hidden] { display: none; }
.gallery-dot {
  width: 6px;
  height: 6px;
  padding: 0;
  border: none;
  border-radius: 50%;
  background: var(--border-strong);
  cursor: pointer;
  transition: background-color .2s ease, transform .2s ease;
}
.gallery-dot.is-active { background: var(--signal); transform: scale(1.3); }

.case-body {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-top: 8px;
}
.case-col-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--text-muted);
  margin-bottom: 10px;
  display: block;
}
.case-col p { font-size: 14.5px; color: var(--text-muted); line-height: 1.65; }
.case-col.result p { color: var(--text); }

.case-footer {
  margin-top: 28px;
  padding-top: 24px;
  border-top: 1px dashed var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 14px;
}
.case-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text);
  text-decoration: none;
  border-bottom: 1px solid var(--border-strong);
  padding-bottom: 2px;
  transition: color .2s ease, border-color .2s ease;
}
.case-link:hover { color: var(--signal); border-color: var(--signal); }
.case-link svg { width: 13px; height: 13px; }

/* ---- Case set pager (paginate featured projects without leaving the page) ---- */
.case-set[hidden] { display: none; }
.case-pager {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 22px;
  margin-top: 8px;
}
.case-pager[hidden] { display: none; }
.case-pager-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text);
  background: transparent;
  border: 1px solid var(--border-strong);
  padding: 10px 18px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: border-color .2s ease, background-color .2s ease, color .2s ease, opacity .2s ease;
}
.case-pager-btn svg { width: 13px; height: 13px; }
.case-pager-btn:hover:not(:disabled) { border-color: var(--signal); background: var(--signal-wash); color: var(--signal); }
.case-pager-btn:disabled { opacity: .35; cursor: default; }
.case-pager-status {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--text-muted);
  min-width: 40px;
  text-align: center;
}
.case-pager-sep { margin: 0 3px; color: var(--text-faint); }

/* ---- Process ---- */
.process-list { display: flex; flex-direction: column; }
.process-item {
  display: grid;
  grid-template-columns: 90px 1px 1fr;
  gap: 28px;
  padding: 28px 0;
  position: relative;
}
.process-item + .process-item { border-top: 1px solid var(--border); }
.process-phase {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--signal);
  letter-spacing: .04em;
  padding-top: 3px;
}
.process-rule { background: var(--border); position: relative; }
.process-rule::before {
  content: "";
  position: absolute;
  top: 4px; left: 50%;
  transform: translateX(-50%);
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--bg);
  border: 1.5px solid var(--signal);
}
.process-content h3 { font-size: 18px; margin-bottom: 8px; }
.process-content p { color: var(--text-muted); font-size: 15px; max-width: 62ch; }

/* ---- Stack ---- */
.stack-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
}
.stack-group { background: var(--bg); padding: 24px 26px; }
.stack-group-title {
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--text-muted);
  letter-spacing: .06em;
  margin-bottom: 14px;
  display: block;
}
.stack-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.stack-tag {
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--text);
  border: 1px solid var(--border-strong);
  padding: 5px 10px;
  border-radius: var(--radius-sm);
}

/* ---- Credentials ---- */
.cred-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.cred {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 22px 24px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-decoration: none;
  color: var(--text);
  transition: border-color .2s ease, transform .2s ease;
}
.cred:hover { border-color: var(--data); transform: translateY(-2px); }
.cred-name { font-weight: 600; font-size: 15px; margin-bottom: 4px; }
.cred-sub { font-family: var(--font-mono); font-size: 12px; color: var(--text-muted); }
.cred-arrow { color: var(--data); flex-shrink: 0; }
.cred-badge {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--data);
  letter-spacing: .05em;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  margin-bottom: 8px;
}
.cred-badge .dot { width: 4px; height: 4px; border-radius: 50%; background: var(--data); }

/* ---- Contact / terminal panel ---- */
.terminal {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-panel);
  overflow: hidden;
}
.terminal-bar {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-panel-raised);
}
.terminal-bar span {
  width: 9px; height: 9px;
  border-radius: 50%;
  background: var(--border-strong);
}
.terminal-bar .label {
  width: auto;
  height: auto;
  border-radius: 0;
  background: none;
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--text-faint);
  margin-left: 8px;
}
.terminal-body { padding: 40px; }
.terminal-body h2 { font-size: clamp(26px, 3.2vw, 36px); max-width: 20ch; margin-bottom: 16px; }
.terminal-body .lede { color: var(--text-muted); font-size: 16.5px; max-width: 56ch; margin-bottom: 32px; }

.contact-row {
  display: flex;
  align-items: center;
  gap: 14px;
  font-family: var(--font-mono);
  font-size: 15px;
  padding: 16px 0;
  border-top: 1px dashed var(--border);
  flex-wrap: wrap;
}
.contact-row:first-of-type { border-top: 1px dashed var(--border); margin-top: 8px; }
.contact-row .prompt { color: var(--signal); flex-shrink: 0; }
.contact-row a {
  color: var(--text);
  text-decoration: none;
  border-bottom: 1px solid var(--border-strong);
}
.contact-row a:hover { color: var(--signal); border-color: var(--signal); }
.copy-btn {
  background: none;
  border: 1px solid var(--border-strong);
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 11px;
  padding: 4px 9px;
  border-radius: 4px;
  cursor: pointer;
  margin-left: auto;
  transition: border-color .2s ease, color .2s ease;
}
.copy-btn:hover { border-color: var(--signal); color: var(--signal); }
.copy-btn[data-copied="true"] { border-color: var(--data); color: var(--data); }

/* ---- Footer ---- */
footer {
  padding: 32px 0 48px;
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-faint);
}
.footer-inner a { color: var(--text-faint); text-decoration: none; }
.footer-inner a:hover { color: var(--text-muted); }

/* ---- Reveal-on-scroll ---- */
.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity .6s ease, transform .6s ease;
}
.reveal.is-visible { opacity: 1; transform: translateY(0); }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* ---- Responsive ---- */
@media (min-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; }
}

@media (max-width: 880px) {
  .nav-links { display: none; }
  .nav-cta { display: none; }
  .nav-toggle { display: inline-flex; }
  .nav.is-open .nav-links {
    display: flex;
    position: absolute;
    top: 100%;
    left: 0; right: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    padding: 8px var(--gutter) 20px;
  }
  .nav.is-open .nav-links a { padding: 12px 0; width: 100%; border-top: 1px solid var(--border); }
  .nav.is-open .nav-links a:first-child { border-top: none; }

  .services-grid { grid-template-columns: 1fr; }
  .case-body { grid-template-columns: 1fr; gap: 20px; }
  .stack-grid { grid-template-columns: 1fr; }
  .cred-list { grid-template-columns: 1fr; }
  .process-item { grid-template-columns: 60px 1px 1fr; gap: 18px; }
  .terminal-body { padding: 28px 22px; }
  section { padding: 64px 0; }
  .case { padding: 26px 20px; }
}