/* ==========================================================================
   Santosh Bondre — Solution Architect portfolio
   Dependency-free stylesheet: design tokens, layout, components.
   ========================================================================== */

/* ---- Design tokens ------------------------------------------------------ */

:root {
  --color-bg: #faf8f5;
  --color-surface: #f1eee7;
  --color-surface-2: #ffffff;
  --color-border: #e3ddd0;
  --color-border-strong: #c9c0ac;
  --color-text: #201c17;
  --color-text-muted: #6b6459;
  --color-accent: #ea580c;
  --color-accent-strong: #c2410c;
  --color-accent-2: #0e7490;
  --color-accent-3: #be185d;
  --color-accent-soft: rgba(234, 88, 12, 0.1);
  --color-on-accent: #ffffff;
  --color-error: #c0362c;
  --color-error-soft: rgba(192, 54, 44, 0.08);
  --color-success: #15803d;

  --font-sans: "Inter", ui-sans-serif, system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;

  --container-max: 72rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

html.dark {
  --color-bg: #070b1f;
  --color-surface: #0d1330;
  --color-surface-2: #151d42;
  --color-border: #232c57;
  --color-border-strong: #4a5893;
  --color-text: #f4f6fb;
  --color-text-muted: #8792b8;
  --color-accent: #fa8b3f;
  --color-accent-strong: #ee5f24;
  --color-accent-2: #22d3ee;
  --color-accent-3: #e0439b;
  --color-accent-soft: rgba(250, 139, 63, 0.14);
  --color-error: #f47066;
  --color-error-soft: rgba(244, 112, 102, 0.14);
  --color-success: #4ade80;
}

/* ---- Reset / base -------------------------------------------------------- */

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  transition: background-color 0.3s var(--ease), color 0.3s var(--ease);
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul, ol { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, p { margin: 0; }
button { font: inherit; color: inherit; background: none; border: none; cursor: pointer; }

::selection { background: var(--color-accent-soft); color: var(--color-text); }

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

.visually-hidden {
  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: 1rem;
  top: -3rem;
  z-index: 100;
  background: var(--color-accent);
  color: var(--color-on-accent);
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 600;
  transition: top 0.2s var(--ease);
}
.skip-link:focus { top: 1rem; }

/* ---- Layout --------------------------------------------------------------- */

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: 1.5rem;
}

@media (min-width: 640px) {
  .container { padding-inline: 2rem; }
}

.section { padding-block: 5rem; }
.section--alt { background: color-mix(in srgb, var(--color-surface) 30%, transparent); border-top: 1px solid var(--color-border); border-bottom: 1px solid var(--color-border); }

@media (min-width: 640px) {
  .section { padding-block: 7rem; }
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--color-accent);
  margin-bottom: 0.75rem;
}
.eyebrow::before {
  content: "";
  width: 0.375rem;
  height: 0.375rem;
  background: var(--color-accent);
  flex-shrink: 0;
}
.section-heading--center { text-align: center; }
.section-heading--center .eyebrow { justify-content: center; }

.section-heading h2 {
  font-size: 1.875rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  max-width: 42rem;
}
.section-heading--center h2 { margin-inline: auto; }
.section-heading p.section-subtitle {
  margin-top: 1rem;
  max-width: 42rem;
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text-muted);
}
.section-heading--center p.section-subtitle { margin-inline: auto; }

@media (min-width: 640px) {
  .section-heading h2 { font-size: 2.25rem; }
  .section-heading p.section-subtitle { font-size: 1.125rem; }
}

/* ---- Buttons -------------------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  border-radius: var(--radius-lg);
  padding: 0.75rem 1.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  transition: opacity 0.2s var(--ease), border-color 0.2s var(--ease), background-color 0.2s var(--ease);
}
.btn svg { width: 1.125rem; height: 1.125rem; flex-shrink: 0; }
.btn-primary { background: var(--color-accent); color: var(--color-on-accent); }
.btn-primary:hover { opacity: 0.9; }
.btn-outline { border: 1px solid var(--color-border); color: var(--color-text); }
.btn-outline:hover { border-color: var(--color-accent); }

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}
.icon-btn:hover { color: var(--color-text); border-color: var(--color-accent); }
.icon-btn svg { width: 1rem; height: 1rem; }

.theme-toggle .icon-sun { display: none; }
.theme-toggle .icon-moon { display: block; }
html.dark .theme-toggle .icon-sun { display: block; }
html.dark .theme-toggle .icon-moon { display: none; }

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid transparent;
  background: transparent;
  transition: background-color 0.3s var(--ease), border-color 0.3s var(--ease), backdrop-filter 0.3s var(--ease);
}
.site-header.is-scrolled {
  border-bottom-color: var(--color-border);
  background: color-mix(in srgb, var(--color-bg) 85%, transparent);
  backdrop-filter: blur(10px);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4rem;
}

.brand {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}
.brand .brand-initials { display: inline; }
.brand .brand-full { display: none; }

@media (min-width: 640px) {
  .brand { font-size: 1.5rem; }
  .brand .brand-initials { display: none; }
  .brand .brand-full { display: inline; }
}

.nav-links {
  display: none;
  align-items: center;
  gap: 2rem;
}
.nav-links a {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  transition: color 0.2s var(--ease);
}
.nav-links a:hover { color: var(--color-text); }

.nav-actions { display: none; align-items: center; gap: 1rem; }

/* Mobile menu: native <details>/<summary> disclosure — works with JS
   disabled. main.js only adds nav-scroll and reveal-on-scroll polish. */
.mobile-details { position: static; }
.mobile-details > summary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  color: var(--color-text);
  list-style: none;
  cursor: pointer;
}
.mobile-details > summary::-webkit-details-marker { display: none; }
.mobile-details > summary::marker { content: ""; }
.mobile-details > summary svg { width: 1rem; height: 1rem; }
.mobile-details > summary .icon-close { display: none; }
.mobile-details[open] > summary .icon-menu { display: none; }
.mobile-details[open] > summary .icon-close { display: block; }

.mobile-panel {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  border-top: 1px solid var(--color-border);
  background: var(--color-bg);
}
.mobile-details[open] .mobile-panel { display: block; }
.mobile-panel .container { padding-block: 1rem; }
.mobile-menu-links a {
  display: block;
  padding: 0.75rem;
  border-radius: var(--radius-md);
  font-size: 1rem;
  color: var(--color-text);
}
.mobile-menu-links a:hover { background: var(--color-surface); }
.mobile-menu-footer {
  margin-top: 0.75rem;
  padding-inline: 0.75rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.mobile-menu-footer .link-with-icon {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--color-text-muted);
}
.mobile-menu-footer .link-with-icon svg { width: 1rem; height: 1rem; }
.mobile-panel .btn { width: 100%; justify-content: center; margin-top: 1rem; }

@media (min-width: 768px) {
  .nav-links { display: flex; }
  .nav-actions { display: flex; }
  .mobile-details { display: none !important; }
}

/* ---- Hero ------------------------------------------------------------------ */

.hero { position: relative; overflow: hidden; }
.hero-glow {
  pointer-events: none;
  position: absolute;
  top: -8rem;
  right: -10%;
  width: 35rem;
  height: 35rem;
  border-radius: 50%;
  opacity: 0.3;
  filter: blur(120px);
  background: radial-gradient(circle, var(--color-accent) 0%, var(--color-accent-3) 45%, transparent 70%);
}

.hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 4rem;
  align-items: center;
  padding-block: 5rem;
}

@media (min-width: 1024px) {
  .hero-grid { grid-template-columns: 1fr 1fr; padding-block: 8rem; }
}

.hero h1 {
  margin-top: 1.25rem;
  font-size: 2.5rem;
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -0.02em;
}
@media (min-width: 640px) { .hero h1 { font-size: 3rem; } }
@media (min-width: 1024px) { .hero h1 { font-size: 3.25rem; } }

.gradient-text {
  background-image: linear-gradient(100deg, var(--color-accent) 0%, var(--color-accent-3) 55%, var(--color-accent-2) 100%);
  background-clip: text;
  -webkit-background-clip: text;
  color: transparent;
}

.hero p.lede {
  margin-top: 1.5rem;
  max-width: 34rem;
  font-size: 1.125rem;
  line-height: 1.6;
  color: var(--color-text-muted);
}

.hero-cta { margin-top: 2.25rem; display: flex; flex-wrap: wrap; align-items: center; gap: 1rem; }
.hero-social { margin-top: 2.5rem; display: flex; align-items: center; gap: 1rem; }

.hero-visual-frame {
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  background: color-mix(in srgb, var(--color-surface) 60%, transparent);
  padding: 2rem;
}
@media (min-width: 640px) { .hero-visual-frame { padding: 2.5rem; } }

/* ---- Architecture diagram (SVG) --------------------------------------------- */

.diagram { width: 100%; margin-inline: auto; }
.diagram-node rect { fill: var(--color-surface); stroke: var(--color-border); stroke-width: 1; }
.diagram-node.is-emphasized rect { stroke: var(--color-accent); stroke-width: 1.5; }
.diagram-node circle { fill: var(--color-accent-2); }
.diagram-node.is-emphasized circle { fill: var(--color-accent); }
.diagram-node text { fill: var(--color-text); font-family: var(--font-sans); font-weight: 500; }
.diagram-line { stroke: var(--color-border); stroke-width: 2; }

/* ---- Snapshot --------------------------------------------------------------- */

.snapshot { border-top: 1px solid var(--color-border); border-bottom: 1px solid var(--color-border); background: color-mix(in srgb, var(--color-surface) 40%, transparent); }
.snapshot-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
@media (min-width: 1024px) { .snapshot-grid { grid-template-columns: repeat(4, 1fr); } }
.snapshot-card { background: var(--color-bg); padding: 1.5rem; }
@media (min-width: 640px) { .snapshot-card { padding: 1.75rem; } }
.snapshot-card .label { font-size: 1.125rem; font-weight: 600; letter-spacing: -0.01em; }
.snapshot-card .desc { margin-top: 0.375rem; font-size: 0.875rem; color: var(--color-text-muted); line-height: 1.5; }

/* ---- About ------------------------------------------------------------------ */

.about-grid { margin-top: 3rem; display: grid; grid-template-columns: 1fr; gap: 3rem; }
@media (min-width: 1024px) { .about-grid { grid-template-columns: 2fr 1fr; gap: 4rem; } }

.career-arc { display: flex; flex-wrap: wrap; align-items: center; gap: 0.5rem 0.5rem; overflow-x: auto; padding-bottom: 0.5rem; }
.career-arc-step {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--color-border);
  border-radius: 9999px;
  padding: 0.375rem 0.875rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-muted);
  white-space: nowrap;
}
.career-arc-step.is-current { border-color: var(--color-accent); color: var(--color-accent); background: var(--color-accent-soft); }
.career-arc-arrow { width: 0.875rem; height: 0.875rem; color: var(--color-text-muted); flex-shrink: 0; }

.about-copy { margin-top: 2rem; display: flex; flex-direction: column; gap: 1.25rem; }
.about-copy p { font-size: 1rem; line-height: 1.7; color: var(--color-text-muted); }
@media (min-width: 640px) { .about-copy p { font-size: 1.125rem; } }

.approach-panel { border-radius: var(--radius-lg); border: 1px solid var(--color-border); background: color-mix(in srgb, var(--color-surface) 50%, transparent); padding: 1.75rem; }
@media (min-width: 640px) { .approach-panel { padding: 2rem; } }
.approach-panel h3 { font-size: 0.875rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.1em; }
.approach-list { margin-top: 1.25rem; display: flex; flex-direction: column; gap: 0.875rem; }
.approach-list li { display: flex; align-items: flex-start; gap: 0.75rem; font-size: 0.9375rem; color: var(--color-text-muted); line-height: 1.5; }
.approach-list .dot { margin-top: 0.5rem; width: 0.375rem; height: 0.375rem; border-radius: 50%; background: var(--color-accent); flex-shrink: 0; }

/* ---- Card grids (Expertise / Tech ecosystem / Certifications) --------------- */

.card-grid { margin-top: 3rem; display: grid; grid-template-columns: 1fr; gap: 1.5rem; }
@media (min-width: 640px) { .card-grid--2 { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .card-grid--3 { grid-template-columns: repeat(3, 1fr); } .card-grid--4 { grid-template-columns: repeat(4, 1fr); } }

.card { border-radius: var(--radius-lg); border: 1px solid var(--color-border); padding: 1.5rem; background: var(--color-bg); height: 100%; }
@media (min-width: 640px) { .card { padding: 1.75rem; } }
.card h3 { font-size: 1rem; font-weight: 600; }

.tag-list { margin-top: 1rem; display: flex; flex-wrap: wrap; gap: 0.5rem; }
.tag {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--color-border);
  border-radius: 9999px;
  background: var(--color-surface);
  padding: 0.25rem 0.75rem;
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

.tech-card { border-radius: var(--radius-md); border: 1px solid var(--color-border); padding: 1.25rem; }
.tech-card .cat { font-family: var(--font-mono); font-size: 0.75rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.1em; color: var(--color-accent); }
.tech-card .items { margin-top: 0.5rem; font-size: 0.875rem; line-height: 1.5; }

/* ---- Experience timeline ----------------------------------------------------- */

.timeline { margin-top: 3.5rem; position: relative; max-width: 48rem; }
.timeline-rail { position: absolute; left: 0.9375rem; top: 0.5rem; bottom: 0.5rem; width: 1px; background: var(--color-border); }
.timeline-list { display: flex; flex-direction: column; gap: 2.5rem; }
.timeline-item { position: relative; padding-left: 2.75rem; }
.timeline-marker {
  position: absolute; left: 0; top: 0.25rem;
  display: flex; align-items: center; justify-content: center;
  width: 2rem; height: 2rem; border-radius: 50%;
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  font-size: 0.75rem; font-weight: 600; color: var(--color-text-muted);
}
.timeline-item.is-current .timeline-marker { border-color: var(--color-accent); background: var(--color-accent-soft); color: var(--color-accent); }
.timeline-item h3 { font-size: 1.125rem; font-weight: 600; }
.timeline-item .current-badge { margin-left: 0.5rem; font-size: 0.75rem; font-weight: 500; color: var(--color-accent); vertical-align: middle; }
.timeline-item p { margin-top: 0.375rem; font-size: 0.9375rem; line-height: 1.6; color: var(--color-text-muted); }
.timeline-note { margin-top: 2.5rem; font-size: 0.875rem; color: var(--color-text-muted); }
.timeline-note .link-with-icon { display: inline-flex; align-items: center; gap: 0.25rem; font-weight: 500; color: var(--color-text); }
.timeline-note .link-with-icon svg { width: 0.875rem; height: 0.875rem; }

/* ---- Projects ----------------------------------------------------------------- */

.projects-list { margin-top: 3rem; display: flex; flex-direction: column; gap: 1.5rem; }

.project-featured {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  background: color-mix(in srgb, var(--color-surface) 40%, transparent);
  padding: 1.75rem;
}
@media (min-width: 640px) { .project-featured { padding: 2.5rem; } }
@media (min-width: 1024px) { .project-featured { grid-template-columns: 3fr 2fr; } }
.project-featured h3 { font-size: 1.5rem; font-weight: 600; }
.project-featured .desc { margin-top: 0.5rem; font-size: 1rem; line-height: 1.6; color: var(--color-text-muted); }
.project-focus { margin-top: 1rem; font-size: 0.875rem; color: var(--color-text-muted); }
.project-focus strong { color: var(--color-text); font-weight: 500; }
.project-diagram-frame {
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 0.75rem;
  border-radius: var(--radius-lg); border: 1px solid var(--color-border); background: var(--color-bg);
  padding: 2rem 1rem;
}
.project-diagram-frame .caption { font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.1em; color: var(--color-text-muted); }

.projects-grid { display: grid; grid-template-columns: 1fr; gap: 1.5rem; }
@media (min-width: 640px) { .projects-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .projects-grid { grid-template-columns: repeat(3, 1fr); } }
.project-card { display: flex; flex-direction: column; height: 100%; border-radius: var(--radius-lg); border: 1px solid var(--color-border); padding: 1.5rem; }
@media (min-width: 640px) { .project-card { padding: 1.75rem; } }
.project-card h3 { font-size: 1.125rem; font-weight: 600; }
.project-card .desc { margin-top: 0.5rem; font-size: 0.875rem; line-height: 1.6; color: var(--color-text-muted); }
.project-card .project-focus { font-size: 0.75rem; }
.project-card .project-diagram-block { margin-top: 1.5rem; padding-top: 1rem; border-top: 1px solid var(--color-border); display: flex; flex-direction: column; align-items: center; gap: 0.5rem; }
.project-card .project-diagram-block .caption { font-size: 0.6875rem; text-transform: uppercase; letter-spacing: 0.1em; color: var(--color-text-muted); }

/* ---- Live flow diagram (DevOps CI/CD -> Kubernetes GitOps / ArgoCD) ------------- */

.flow-panel {
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  background: color-mix(in srgb, var(--color-surface) 40%, transparent);
  padding: 1.75rem;
}
@media (min-width: 640px) { .flow-panel { padding: 2rem 2.25rem 2.25rem; } }

.flow-panel-header {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 0.75rem;
  padding-bottom: 1.25rem; margin-bottom: 1.5rem;
  border-bottom: 1px solid var(--color-border);
}
.flow-live-badge {
  display: inline-flex; align-items: center; gap: 0.5rem;
  font-family: var(--font-mono); font-size: 0.75rem; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.1em; color: var(--color-text);
}
.flow-live-dot { position: relative; width: 0.5rem; height: 0.5rem; border-radius: 50%; background: var(--color-accent); flex-shrink: 0; }
.flow-live-dot::after {
  content: ""; position: absolute; inset: -0.375rem; border-radius: 50%;
  border: 1px solid var(--color-accent); opacity: 0;
  animation: flow-live-ping 2s ease-out infinite;
}
.flow-panel-label { font-family: var(--font-mono); font-size: 0.6875rem; letter-spacing: 0.08em; color: var(--color-text-muted); }

.flow-diagram-frame { border-radius: var(--radius-md); background: var(--color-bg); padding: 0.5rem; overflow-x: auto; }
.flow-diagram { width: 100%; min-width: 640px; }

.flow-col-label { fill: var(--color-text-muted); font-family: var(--font-mono); font-size: 11px; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; }
.flow-col-label--accent { fill: var(--color-accent); }

.flow-node rect { fill: var(--color-surface); stroke: var(--color-border); stroke-width: 1; }
.flow-node.is-core rect { stroke: var(--color-accent); stroke-width: 1.5; }
.flow-node.is-argocd rect { stroke: var(--color-accent-2); }
.flow-node .flow-node-title { fill: var(--color-text); font-family: var(--font-sans); font-weight: 600; font-size: 12.5px; }
.flow-node .flow-node-sub { fill: var(--color-text-muted); font-family: var(--font-sans); font-size: 10.5px; }

.flow-line {
  fill: none; stroke: var(--color-border-strong); stroke-width: 1.75;
  stroke-dasharray: 6 6;
  animation: flow-dash 1.2s linear infinite;
}
.flow-line--loop {
  stroke: var(--color-accent-2);
  stroke-dasharray: 5 7;
  animation: flow-dash-reverse 1.8s linear infinite;
}

.flow-pulse { fill: var(--color-accent); transform-box: fill-box; transform-origin: center; animation: flow-pulse 2.6s ease-in-out infinite; }
.flow-pulse--loop { fill: var(--color-accent-2); }
.flow-arrowhead { fill: var(--color-accent-2); }

.flow-caption { margin-top: 1.5rem; font-size: 0.8125rem; line-height: 1.6; color: var(--color-text-muted); max-width: 42rem; }
.flow-caption strong { color: var(--color-text); font-weight: 500; }

@keyframes flow-dash { to { stroke-dashoffset: -24; } }
@keyframes flow-dash-reverse { to { stroke-dashoffset: 24; } }
@keyframes flow-pulse {
  0%, 100% { opacity: 0; transform: scale(0.6); }
  50% { opacity: 1; transform: scale(1.5); }
}
@keyframes flow-live-ping {
  0% { transform: scale(0.6); opacity: 0.6; }
  100% { transform: scale(1.6); opacity: 0; }
}

@media (prefers-reduced-motion: reduce) {
  .flow-line, .flow-line--loop, .flow-pulse, .flow-live-dot::after { animation: none; }
  .flow-line, .flow-line--loop { stroke-dasharray: none; }
  .flow-pulse { opacity: 1; transform: none; }
}

/* ---- Certifications ------------------------------------------------------------ */

.cert-card { display: flex; align-items: flex-start; gap: 0.875rem; border-radius: var(--radius-lg); border: 1px solid var(--color-border); background: var(--color-bg); padding: 1.25rem; height: 100%; }
.cert-icon { flex-shrink: 0; display: flex; align-items: center; justify-content: center; width: 2.25rem; height: 2.25rem; border-radius: 50%; background: var(--color-accent-soft); color: var(--color-accent); }
.cert-icon svg { width: 1rem; height: 1rem; }
.cert-name { font-size: 0.875rem; font-weight: 600; line-height: 1.4; }
.cert-issuer, .cert-date { margin-top: 0.25rem; font-size: 0.75rem; color: var(--color-text-muted); }

/* ---- Interest tags -------------------------------------------------------------- */

.interest-list { margin-top: 2rem; display: flex; flex-wrap: wrap; gap: 0.75rem; }
.interest-tag { display: inline-flex; align-items: center; border: 1px solid var(--color-border); border-radius: 9999px; padding: 0.5rem 1rem; font-size: 0.875rem; color: var(--color-text-muted); }

/* ---- Philosophy ------------------------------------------------------------------ */

.philosophy-grid { margin-top: 3rem; display: grid; grid-template-columns: 1fr; gap: 1.5rem; text-align: center; }
@media (min-width: 640px) { .philosophy-grid { grid-template-columns: repeat(2, 1fr); text-align: left; } }
@media (min-width: 1024px) { .philosophy-grid { grid-template-columns: repeat(4, 1fr); } }
.philosophy-item .num { font-family: var(--font-mono); font-size: 0.75rem; color: var(--color-accent); }
.philosophy-item h3 { margin-top: 0.5rem; font-size: 1.125rem; font-weight: 600; }
.philosophy-item p { margin-top: 0.5rem; font-size: 0.875rem; line-height: 1.6; color: var(--color-text-muted); }

/* ---- Beyond the Architecture (personal) -------------------------------------------- */

.beyond-architecture .section-heading p.section-subtitle { font-style: italic; }

.travel-gallery {
  margin-top: 3.5rem;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  grid-auto-rows: 11rem;
  gap: 0.75rem;
}
@media (min-width: 640px) {
  .travel-gallery { grid-template-columns: repeat(4, 1fr); grid-auto-rows: 12rem; gap: 1rem; }
}

.travel-photo {
  position: relative;
  display: block;
  width: 100%;
  height: 100%;
  overflow: hidden;
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  padding: 0;
  border: none;
}
.travel-photo.is-size-lg { grid-column: span 2; grid-row: span 2; }
.travel-photo.is-size-wide { grid-column: span 2; }

.travel-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s var(--ease);
}
.travel-photo:hover img,
.travel-photo:focus-visible img { transform: scale(1.04); }

.travel-photo-overlay {
  position: absolute;
  inset: auto 0 0 0;
  display: flex;
  flex-direction: column;
  gap: 0.125rem;
  padding: 1rem 0.875rem 0.75rem;
  background: linear-gradient(to top, rgba(7, 11, 31, 0.82), transparent);
  color: #f4f6fb;
  opacity: 0;
  transform: translateY(6px);
  transition: opacity 0.3s var(--ease), transform 0.3s var(--ease);
  text-align: left;
}
.travel-photo:hover .travel-photo-overlay,
.travel-photo:focus-visible .travel-photo-overlay { opacity: 1; transform: none; }
.travel-photo-overlay .location { font-size: 0.8125rem; font-weight: 600; }
.travel-photo-overlay .caption { font-size: 0.6875rem; opacity: 0.85; }

@media (prefers-reduced-motion: reduce) {
  .travel-photo img { transition: none; }
}

/* ---- Outside of Technology (personal interests) ------------------------------------ */

.interests-panel { margin-top: 3.5rem; text-align: center; }
.interests-panel h3 { font-size: 0.75rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.1em; color: var(--color-text-muted); }
.interests-list { margin-top: 1.5rem; display: flex; flex-wrap: wrap; justify-content: center; gap: 1.75rem 2.25rem; }
.interests-list li { display: flex; flex-direction: column; align-items: center; gap: 0.625rem; max-width: 6.5rem; font-size: 0.8125rem; color: var(--color-text-muted); }
.interests-list .icon {
  display: flex; align-items: center; justify-content: center;
  width: 2.75rem; height: 2.75rem;
  border-radius: 50%;
  border: 1px solid var(--color-border);
  color: var(--color-accent);
}
.interests-list .icon svg { width: 1.25rem; height: 1.25rem; }

/* ---- Travel photo lightbox ----------------------------------------------------------- */

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  background: rgba(7, 11, 31, 0.92);
}
.lightbox[hidden] { display: none; }

.lightbox-figure { max-width: 56rem; width: 100%; margin: 0; text-align: center; }
.lightbox-figure img { max-height: 78vh; width: auto; max-width: 100%; margin-inline: auto; border-radius: var(--radius-md); }
.lightbox-figure figcaption { margin-top: 1rem; color: #f4f6fb; font-size: 0.875rem; }
.lightbox-figure figcaption .location { font-weight: 600; }
.lightbox-figure figcaption .caption { margin-top: 0.25rem; color: rgba(244, 246, 251, 0.7); }

.lightbox-close,
.lightbox-nav {
  position: absolute;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.75rem;
  height: 2.75rem;
  border-radius: 50%;
  border: 1px solid rgba(244, 246, 251, 0.25);
  background: rgba(255, 255, 255, 0.06);
  color: #f4f6fb;
  transition: background-color 0.2s var(--ease);
}
.lightbox-close:hover, .lightbox-nav:hover { background: rgba(255, 255, 255, 0.16); }
.lightbox-close svg, .lightbox-nav svg { width: 1.25rem; height: 1.25rem; }
.lightbox-close { top: 1.25rem; right: 1.25rem; }
.lightbox-prev { left: 1.25rem; top: 50%; transform: translateY(-50%); }
.lightbox-next { right: 1.25rem; top: 50%; transform: translateY(-50%); }
@media (max-width: 640px) {
  .lightbox-close, .lightbox-nav { width: 2.25rem; height: 2.25rem; }
  .lightbox-prev { left: 0.5rem; }
  .lightbox-next { right: 0.5rem; }
}

/* ---- Contact ---------------------------------------------------------------------- */

.contact { position: relative; overflow: hidden; padding-block: 6rem; }
@media (min-width: 640px) { .contact { padding-block: 8rem; } }
.contact-bg { position: absolute; inset: 0; width: 100%; height: 100%; opacity: 0.35; pointer-events: none; }
.contact-inner { position: relative; max-width: 68rem; margin-inline: auto; }

.contact-grid { display: grid; grid-template-columns: 1fr; gap: 3rem; }
@media (min-width: 1024px) { .contact-grid { grid-template-columns: 5fr 7fr; gap: 4rem; align-items: start; } }

.contact-intro h2 { font-size: 1.875rem; font-weight: 600; letter-spacing: -0.02em; }
@media (min-width: 640px) { .contact-intro h2 { font-size: 2.25rem; } }
.contact-intro p.lede { margin-top: 1.25rem; font-size: 1.125rem; line-height: 1.6; color: var(--color-text-muted); }
.contact-secondary { margin-top: 0.875rem; font-size: 0.9375rem; line-height: 1.6; color: var(--color-text-muted); }
.contact-cta { margin-top: 2rem; display: flex; flex-wrap: wrap; align-items: center; gap: 1rem; }
.contact-location { margin-top: 2rem; display: inline-flex; align-items: center; gap: 0.5rem; font-size: 0.875rem; color: var(--color-text-muted); }
.contact-location svg { width: 1rem; height: 1rem; flex-shrink: 0; color: var(--color-accent); }

/* ---- Contact form ------------------------------------------------------------------- */

.contact-form-panel {
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  background: color-mix(in srgb, var(--color-surface) 35%, transparent);
  padding: 1.75rem;
}
@media (min-width: 640px) { .contact-form-panel { padding: 2.25rem; } }

.contact-form { display: flex; flex-direction: column; gap: 1.375rem; text-align: left; }
.contact-form[hidden] { display: none; }

.form-field { display: flex; flex-direction: column; gap: 0.5rem; text-align: left; }
.form-field label { font-size: 0.8125rem; font-weight: 600; }
.form-field .field-optional { font-weight: 400; color: var(--color-text-muted); }

.form-field input,
.form-field select,
.form-field textarea {
  width: 100%;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  color: var(--color-text);
  padding: 0.75rem 0.875rem;
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  line-height: 1.5;
  transition: border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}
.form-field textarea { resize: vertical; min-height: 8rem; }
.form-field input::placeholder,
.form-field textarea::placeholder { color: var(--color-text-muted); }

.form-field input:focus-visible,
.form-field select:focus-visible,
.form-field textarea:focus-visible {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-soft);
}

.form-field input[aria-invalid="true"],
.form-field select[aria-invalid="true"],
.form-field textarea[aria-invalid="true"] { border-color: var(--color-error); }
.form-field input[aria-invalid="true"]:focus-visible,
.form-field select[aria-invalid="true"]:focus-visible,
.form-field textarea[aria-invalid="true"]:focus-visible { box-shadow: 0 0 0 3px var(--color-error-soft); }

.field-error {
  min-height: 1rem;
  font-size: 0.8125rem;
  color: var(--color-error);
}
.field-error:empty { display: none; }

.field-meta { display: flex; align-items: flex-start; justify-content: space-between; gap: 1rem; }
.field-meta .field-error { flex: 1; }
.field-count { flex-shrink: 0; font-size: 0.75rem; color: var(--color-text-muted); font-family: var(--font-mono); }
.field-count.is-near-limit { color: var(--color-error); }

/* Honeypot — hidden from sighted and AT users, still present for simple bots to fill in */
.hp-field { position: absolute; left: -9999px; top: -9999px; width: 1px; height: 1px; overflow: hidden; }

.btn-submit {
  position: relative;
  align-self: flex-start;
  min-width: 11rem;
  justify-content: center;
  transition: opacity 0.2s var(--ease), transform 0.2s var(--ease);
}
.btn-submit:hover:not(:disabled) { transform: translateY(-1px); }
.btn-submit:disabled { opacity: 0.6; cursor: not-allowed; }
.btn-submit .btn-label { transition: opacity 0.2s var(--ease); }
.btn-submit .btn-label--hover { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; opacity: 0; }
.btn-submit:hover:not(:disabled) .btn-label--default { opacity: 0; }
.btn-submit:hover:not(:disabled) .btn-label--hover { opacity: 1; }

.form-status { min-height: 1rem; font-size: 0.8125rem; color: var(--color-text-muted); }

.contact-result { border-radius: var(--radius-lg); border: 1px solid var(--color-border); padding: 2rem; text-align: center; }
.contact-result h3 { font-size: 1.25rem; font-weight: 600; }
.contact-result p { margin-top: 0.75rem; font-size: 0.9375rem; line-height: 1.6; color: var(--color-text-muted); }
.contact-result p a { color: var(--color-text); font-weight: 500; text-decoration: underline; text-underline-offset: 2px; }
.contact-result button { margin-top: 1.5rem; }

@media (prefers-reduced-motion: reduce) {
  .btn-submit, .btn-submit .btn-label { transition: none; }
}

/* ---- Footer ------------------------------------------------------------------------ */

.site-footer { border-top: 1px solid var(--color-border); padding-block: 2.5rem; }
.footer-inner { display: flex; flex-direction: column; align-items: center; gap: 1.5rem; text-align: center; }
@media (min-width: 640px) { .footer-inner { flex-direction: row; justify-content: space-between; text-align: left; } }
.footer-name { font-size: 0.875rem; font-weight: 600; }
.footer-tagline { margin-top: 0.25rem; font-size: 0.75rem; color: var(--color-text-muted); }
.footer-meta { display: flex; align-items: center; gap: 1.25rem; }
.footer-meta p { font-size: 0.75rem; color: var(--color-text-muted); }

/* ---- Scroll reveal (progressive enhancement) ---------------------------------------- */

.has-js .reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s var(--ease), transform 0.5s var(--ease);
  transition-delay: var(--reveal-delay, 0s);
}
.has-js .reveal.is-visible { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .has-js .reveal { opacity: 1; transform: none; transition: none; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}