/* Reset / Base */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; color-scheme: dark; }
body, h1, h2, h3, p, ul, ol, dl, dd { margin: 0; }
ul, ol { padding: 0; }
img, svg, canvas { display: block; max-width: 100%; }
button, input, textarea, select { font: inherit; }
a { color: inherit; }
button { border: 0; }

/* Design Tokens */
:root {
  --bg: #0b0f14;
  --bg-deep: #080b0f;
  --surface: #11171f;
  --surface-raised: #151d27;
  --surface-soft: rgba(255, 255, 255, 0.035);
  --surface-softer: rgba(255, 255, 255, 0.022);
  --text: #f4f7fb;
  --text-soft: #cbd4df;
  --text-muted: #8f9baa;
  --border: rgba(255, 255, 255, 0.09);
  --border-strong: rgba(255, 255, 255, 0.16);
  --accent: #74a7ff;
  --accent-strong: #9bbdff;
  --accent-soft: rgba(116, 167, 255, 0.12);
  --success: #7dd3a7;
  --danger-dot: #d78080;
  --warning-dot: #cbb37d;
  --success-dot: #7bb596;
  --shadow-sm: 0 12px 30px rgba(0, 0, 0, 0.18);
  --shadow-lg: 0 28px 80px rgba(0, 0, 0, 0.26);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-xl: 24px;
  --container: 1180px;
  --nav-height: 68px;
  --space-xs: 0.5rem;
  --space-sm: 0.75rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4.5rem;
  --space-section: clamp(4rem, 6vw, 6rem);
  --sans: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, Monaco, monospace;
}

/* Typography */
body {
  min-width: 320px;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 1rem;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1, h2, h3 { line-height: 1.08; letter-spacing: -0.035em; text-wrap: balance; }
h1 { font-size: clamp(3rem, 6.5vw, 4.9rem); max-width: 10.5ch; }
h2 { font-size: clamp(2.2rem, 4.4vw, 3.35rem); max-width: 14ch; }
h3 { font-size: clamp(1.3rem, 2.4vw, 1.9rem); }
p { color: var(--text-soft); }
strong { color: var(--text); }
::selection { background: rgba(116, 167, 255, 0.28); color: var(--text); }

.sr-only {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

.skip-link {
  position: fixed;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 100;
  transform: translateY(-160%);
  padding: 0.65rem 0.85rem;
  background: var(--text);
  color: var(--bg);
  border-radius: var(--radius-sm);
  text-decoration: none;
  font-weight: 700;
}
.skip-link:focus { transform: translateY(0); }

/* Layout */
.container { width: min(var(--container), calc(100% - 2.5rem)); margin-inline: auto; }
.narrow-container { max-width: 820px; margin-inline: auto; }
.section-shell { position: relative; z-index: 2; padding-block: var(--space-section); }
.compact-section { padding-block: clamp(3.5rem, 5vw, 5rem); }
.compact-top { padding-top: 1rem; }

.site-backdrop {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(circle at 18% 10%, rgba(85, 124, 196, 0.12), transparent 32rem),
    radial-gradient(circle at 82% 34%, rgba(81, 126, 120, 0.06), transparent 30rem),
    linear-gradient(rgba(255, 255, 255, 0.018) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.018) 1px, transparent 1px);
  background-size: auto, auto, 54px 54px, 54px 54px;
  mask-image: linear-gradient(to bottom, rgba(0,0,0,0.95), rgba(0,0,0,0.36));
}

.ambient-canvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  pointer-events: none;
  opacity: 0.78;
}

.section-intro { display: grid; gap: 0.9rem; margin-bottom: 3.2rem; }
.section-intro > p:last-child { max-width: 64ch; }
.section-intro-row { grid-template-columns: minmax(0, 1fr) auto; align-items: end; gap: 2rem; }
.section-kicker, .eyebrow, .project-index {
  color: var(--accent-strong);
  font-family: var(--mono);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

/* Navigation */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 20;
  height: var(--nav-height);
  background: rgba(11, 15, 20, 0.18);
  border-bottom: 1px solid transparent;
  transition: background-color 180ms ease, border-color 180ms ease, box-shadow 180ms ease;
}
.site-header.is-scrolled {
  background: rgba(11, 15, 20, 0.92);
  border-bottom-color: var(--border);
  box-shadow: 0 10px 35px rgba(0, 0, 0, 0.12);
}
.nav-shell { min-height: var(--nav-height); display: flex; align-items: center; justify-content: space-between; gap: 1.5rem; }
.brand { color: var(--text); font-weight: 800; letter-spacing: -0.025em; text-decoration: none; white-space: nowrap; }
.primary-nav { display: flex; align-items: center; gap: 1.25rem; font-size: 0.91rem; }
.primary-nav a { color: var(--text-muted); text-decoration: none; transition: color 150ms ease, background-color 150ms ease, border-color 150ms ease; }
.primary-nav a:hover, .primary-nav a:focus-visible, .primary-nav a[aria-current="page"] { color: var(--text); }
.nav-resume { white-space: nowrap; }
.nav-toggle { display: none; width: 44px; height: 44px; border-radius: var(--radius-sm); background: transparent; color: var(--text); cursor: pointer; }
.nav-toggle span[aria-hidden="true"] { display: block; width: 20px; height: 1.5px; margin: 5px auto; background: currentColor; transition: transform 160ms ease, opacity 160ms ease; }

/* Buttons / Links */
.button {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  padding: 0.72rem 1rem;
  border: 1px solid transparent;
  border-radius: 10px;
  text-decoration: none;
  font-weight: 750;
  line-height: 1;
  transition: transform 150ms ease, background-color 150ms ease, border-color 150ms ease, color 150ms ease;
}
.button:hover { transform: translateY(-1px); }
.button-primary { color: #07111f; background: var(--accent); border-color: var(--accent); }
.button-primary:hover { background: var(--accent-strong); border-color: var(--accent-strong); }
.button-secondary { color: var(--text); background: rgba(255,255,255,0.025); border-color: var(--border); }
.button-secondary:hover { background: rgba(255,255,255,0.06); border-color: var(--border-strong); }
.button.nav-resume { min-height: 38px; padding: 0.55rem 0.8rem; }
.text-link { display: inline-flex; align-items: center; gap: 0.4rem; color: var(--text); text-decoration: none; font-weight: 750; }
.text-link span { transition: transform 150ms ease; }
.text-link:hover span { transform: translateX(3px); }
a:focus-visible, button:focus-visible { outline: 2px solid var(--accent-strong); outline-offset: 4px; }

/* Hero */
.hero { min-height: min(900px, 100svh); padding-top: calc(var(--nav-height) + clamp(2rem, 4vw, 3.5rem)); padding-bottom: clamp(2.5rem, 4vw, 4rem); display: grid; align-items: start; }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(390px, 0.8fr); align-items: center; gap: clamp(2.5rem, 6vw, 6rem); }
.hero-copy { display: grid; gap: 1.5rem; }
.hero-summary { max-width: 62ch; font-size: clamp(1.05rem, 1.7vw, 1.22rem); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 0.75rem; }
.hero-resume { width: fit-content; }
.hero-focus { display: flex; flex-wrap: wrap; gap: 0.65rem 1.25rem; color: var(--text-muted); list-style: none; font-family: var(--mono); font-size: 0.82rem; }
.hero-focus li { position: relative; padding-left: 0.85rem; }
.hero-focus li::before { content: ""; position: absolute; left: 0; top: 0.7em; width: 4px; height: 4px; border-radius: 50%; background: var(--accent); }

/* Terminal */
.hero-terminal-wrap { width: 100%; max-width: 520px; justify-self: end; }
.hero-terminal {
  width: 100%;
  min-height: 330px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: rgba(12, 18, 25, 0.94);
  box-shadow: var(--shadow-lg), inset 0 1px rgba(255,255,255,0.03);
}
.terminal-bar { min-height: 44px; display: grid; grid-template-columns: 80px 1fr 80px; align-items: center; padding: 0 0.9rem; background: #151d26; border-bottom: 1px solid var(--border); }
.terminal-controls { display: flex; gap: 7px; }
.terminal-controls span { width: 10px; height: 10px; border: 1px solid rgba(0,0,0,0.18); border-radius: 50%; box-shadow: inset 0 1px rgba(255,255,255,0.16); }
.terminal-controls span:first-child { background: var(--danger-dot); }
.terminal-controls span:nth-child(2) { background: var(--warning-dot); }
.terminal-controls span:nth-child(3) { background: var(--success-dot); }
.terminal-title { grid-column: 2; text-align: center; color: var(--text-muted); font-family: var(--mono); font-size: 0.74rem; letter-spacing: 0.01em; }
.terminal-body { min-height: 286px; padding: clamp(1.1rem, 2.2vw, 1.5rem); color: var(--text-soft); font-family: var(--mono); font-size: clamp(0.76rem, 1vw, 0.88rem); line-height: 1.72; white-space: pre-wrap; overflow-wrap: anywhere; }
.terminal-line { min-height: 1.72em; color: var(--text); }
.terminal-prompt { color: var(--accent); font-weight: 700; }
.terminal-command { color: var(--text); }
.terminal-output { min-height: 1.72em; color: var(--text-muted); }
.terminal-status { color: var(--success); }
.terminal-spacer { min-height: 0.62em; }
.terminal-cursor-line { min-height: 1.72em; }
.terminal-cursor { display: inline-block; color: var(--accent-strong); line-height: inherit; vertical-align: baseline; animation: cursor-blink 1.15s steps(1, end) infinite; }
@keyframes cursor-blink { 50% { opacity: 0; } }

/* Impact */
.impact { border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); background: rgba(255,255,255,0.012); }
.impact-grid { display: grid; grid-template-columns: repeat(4, 1fr); border: 1px solid var(--border); border-radius: var(--radius-lg); overflow: hidden; background: rgba(255,255,255,0.018); }
.impact-item { min-height: 145px; padding: 1.5rem; display: grid; align-content: center; gap: 0.4rem; border-right: 1px solid var(--border); }
.impact-item:last-child { border-right: 0; }
.impact-item strong { font-size: clamp(1.35rem, 2.7vw, 2rem); letter-spacing: -0.035em; }
.impact-item span { color: var(--text-muted); font-size: 0.9rem; }

/* Experience */
.timeline { display: grid; border-top: 1px solid var(--border); }
.timeline-item { display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: 3rem; padding: 2.3rem 0; border-bottom: 1px solid var(--border); }
.timeline-meta { display: grid; align-content: start; gap: 0.3rem; color: var(--text-muted); font-family: var(--mono); font-size: 0.78rem; }
.timeline-content { display: grid; gap: 1rem; }
.timeline-company { color: var(--accent-strong); font-weight: 750; }
.achievement-list { display: grid; gap: 0.65rem; padding-left: 1.25rem; color: var(--text-soft); }
.achievement-list li::marker { color: var(--accent); }
.tag-list { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.tag-list span { padding: 0.36rem 0.55rem; border: 1px solid var(--border); border-radius: 7px; background: var(--surface-softer); color: var(--text-muted); font-family: var(--mono); font-size: 0.72rem; }

/* Projects */
.featured-projects { display: grid; gap: 3.5rem; }
.featured-project { display: grid; grid-template-columns: minmax(0, 0.92fr) minmax(420px, 1.08fr); gap: clamp(2rem, 4vw, 4rem); align-items: center; padding-bottom: 3.5rem; border-bottom: 1px solid var(--border); }
.featured-project-reverse .project-copy { order: 2; }
.featured-project-reverse .project-visual { order: 1; }
.project-copy { display: grid; gap: 1.1rem; }
.project-lede { font-size: 1.05rem; }
.project-facts { display: grid; gap: 0.75rem; }
.project-facts div { display: grid; grid-template-columns: 78px minmax(0, 1fr); gap: 0.8rem; }
.project-facts dt { color: var(--text); font-weight: 750; font-size: 0.88rem; }
.project-facts dd { color: var(--text-muted); }
.project-links { display: flex; flex-wrap: wrap; gap: 1rem; }
.project-links a, .archive-links a { color: var(--text); text-decoration: none; font-weight: 750; font-size: 0.9rem; }
.project-links a:hover, .archive-links a:hover { color: var(--accent-strong); }
.project-visual { min-height: 390px; border: 1px solid var(--border); border-radius: var(--radius-xl); background: linear-gradient(145deg, rgba(116,167,255,0.075), rgba(255,255,255,0.015)); padding: clamp(1rem, 2vw, 1.5rem); display: grid; place-items: center; overflow: hidden; }
.project-visual-service { background: linear-gradient(145deg, rgba(94,181,255,0.1), rgba(255,255,255,0.015) 62%); }
.visual-window { width: min(100%, 560px); border: 1px solid var(--border-strong); border-radius: var(--radius-md); overflow: hidden; background: #0d131a; box-shadow: var(--shadow-sm); }
.visual-toolbar { min-height: 40px; display: flex; align-items: center; gap: 6px; padding: 0 0.8rem; background: #151d26; border-bottom: 1px solid var(--border); }
.visual-toolbar span { width: 10px; height: 10px; border: 1px solid rgba(0,0,0,0.18); border-radius: 50%; box-shadow: inset 0 1px rgba(255,255,255,0.16); }
.visual-toolbar span:first-child { background: var(--danger-dot); }
.visual-toolbar span:nth-child(2) { background: var(--warning-dot); }
.visual-toolbar span:nth-child(3) { background: var(--success-dot); }
.visual-toolbar em { margin-left: auto; color: var(--text-muted); font-family: var(--mono); font-style: normal; font-size: 0.66rem; }
.service-diagram { min-height: 230px; display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: 0.75rem; padding: 2rem 1.25rem; background: radial-gradient(circle at center, rgba(94,181,255,0.11), transparent 58%); }
.service-node { min-width: 82px; display: grid; gap: 0.45rem; padding: 0.85rem 0.65rem; border: 1px solid var(--border-strong); border-radius: 10px; background: rgba(255,255,255,0.035); color: var(--text-soft); text-align: center; }
.service-node small { color: var(--text-muted); font-family: var(--mono); font-size: 0.63rem; }
.service-node strong { font-family: var(--mono); font-size: 0.72rem; line-height: 1.35; }
.service-api { border-color: rgba(94,181,255,0.65); background: rgba(94,181,255,0.14); color: #b9e0ff; }
.service-arrow { color: var(--text-muted); }
.visual-metrics { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--border); border-top: 1px solid var(--border); }
.visual-metrics span { padding: 0.9rem 0.6rem; background: #101820; color: var(--text-soft); text-align: center; font-family: var(--mono); font-size: 0.68rem; }
.visual-metrics strong { display: block; margin-top: 0.15rem; color: var(--text); font-size: 0.82rem; }
.project-visual-ml { background: linear-gradient(145deg, rgba(177, 133, 255, 0.08), rgba(255,255,255,0.015) 62%); }
.project-visual-scheduler { background: linear-gradient(145deg, rgba(125, 211, 167, 0.08), rgba(255,255,255,0.015) 62%); }
.project-visual-ml .visual-window, .project-visual-scheduler .visual-window, .project-visual-security .visual-window { min-height: 330px; }
.compression-diagram { min-height: 230px; display: flex; align-items: center; justify-content: center; gap: 0.75rem; padding: 2rem 1.25rem; background: radial-gradient(circle at center, rgba(177,133,255,0.07), transparent 58%); }
.planning-diagram { min-height: 230px; display: grid; grid-template-columns: minmax(0, 0.9fr) auto minmax(0, 1fr) auto minmax(0, 0.9fr); align-items: center; gap: 0.7rem; padding: 1.5rem 1.1rem; background: radial-gradient(circle at center, rgba(125,211,167,0.07), transparent 58%); }
.planning-sources { display: grid; gap: 0.7rem; }
.diagram-node { min-width: 104px; display: grid; gap: 0.45rem; padding: 0.85rem 0.65rem; border: 1px solid var(--border-strong); border-radius: 10px; background: rgba(255,255,255,0.035); color: var(--text-soft); text-align: center; }
.compression-diagram .diagram-node { min-width: 90px; }
.planning-diagram .diagram-node { min-width: 0; }
.diagram-node small { color: var(--text-muted); font-family: var(--mono); font-size: 0.63rem; }
.diagram-node strong { font-family: var(--mono); font-size: 0.72rem; line-height: 1.35; }
.diagram-arrow { color: var(--text-muted); font-size: 1.1rem; font-style: normal; }
.compression-model { border-color: rgba(177,133,255,0.55); background: rgba(177,133,255,0.1); color: #d8c5ff; }
.planning-engine { border-color: rgba(125,211,167,0.55); background: rgba(125,211,167,0.1); color: #b9efd2; }
.security-stack { min-height: 290px; display: grid; place-items: center; align-content: center; gap: 0.3rem; padding: 1.5rem; }
.security-stack span { width: min(100%, 280px); padding: 0.6rem 0.8rem; border: 1px solid var(--border); border-radius: 9px; color: var(--text-soft); text-align: center; font-family: var(--mono); font-size: 0.7rem; }
.security-stack span:nth-of-type(3) { border-color: rgba(116,167,255,0.35); background: var(--accent-soft); }
.security-stack i { color: var(--text-muted); font-style: normal; }
.mobile-inline-link { display: none; margin-top: 2rem; }

/* Expertise */
.expertise-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.expertise-card { min-height: 360px; padding: 1.65rem; border: 1px solid var(--border); border-radius: var(--radius-lg); background: linear-gradient(180deg, rgba(255,255,255,0.028), rgba(255,255,255,0.014)); display: grid; align-content: start; gap: 1rem; transition: transform 160ms ease, border-color 160ms ease, background-color 160ms ease; }
.expertise-card:hover { transform: translateY(-2px); border-color: var(--border-strong); background: rgba(255,255,255,0.035); }
.expertise-number { color: var(--accent); font-family: var(--mono); font-size: 0.74rem; }
.expertise-card p { color: var(--text-muted); }
.expertise-card ul { display: grid; gap: 0.55rem; padding-left: 1.1rem; color: var(--text-soft); }
.expertise-card li::marker { color: var(--accent); }

/* Domain Sections */
.domain-section { border-top: 1px solid rgba(255,255,255,0.055); }
.domain-grid { display: grid; grid-template-columns: minmax(0, 0.86fr) minmax(430px, 1.14fr); align-items: center; gap: clamp(2.5rem, 6vw, 6rem); }
.domain-grid-reverse .domain-copy { order: 2; }
.domain-grid-reverse .flow-card { order: 1; }
.domain-copy { display: grid; gap: 1.2rem; }
.domain-points { display: grid; gap: 0.6rem; padding-left: 1.2rem; color: var(--text-soft); }
.domain-points li::marker { color: var(--accent); }
.flow-card { padding: 1rem; border: 1px solid var(--border); border-radius: var(--radius-lg); background: rgba(255,255,255,0.018); box-shadow: var(--shadow-sm); }
.flow-card > i { display: block; color: var(--text-muted); text-align: center; font-style: normal; line-height: 1.2; }
.flow-step { display: grid; grid-template-columns: 42px 1fr; gap: 0.2rem 0.7rem; padding: 0.9rem 1rem; border: 1px solid transparent; border-radius: var(--radius-md); transition: background-color 220ms ease, border-color 220ms ease, transform 220ms ease; }
.flow-step span { grid-row: span 2; align-self: center; color: var(--accent); font-family: var(--mono); font-size: 0.7rem; }
.flow-step strong { font-size: 0.95rem; }
.flow-step small { color: var(--text-muted); }
.flow-card.is-active .flow-step { border-color: rgba(116,167,255,0.12); background: rgba(116,167,255,0.035); }
.security-flow.is-active .flow-step { border-color: rgba(125,211,167,0.12); background: rgba(125,211,167,0.03); }

/* Skills */
.skills-groups { display: grid; gap: 2.5rem; }
.skill-group { display: grid; gap: 1rem; }
.skill-group h3 { font-size: 1.08rem; color: var(--text-soft); }
.skill-chips { display: flex; flex-wrap: wrap; gap: 0.65rem; }
.skill-chip { display: inline-flex; align-items: center; gap: 0.55rem; min-height: 42px; padding: 0.55rem 0.75rem; border: 1px solid var(--border); border-radius: 10px; background: rgba(255,255,255,0.03); color: var(--text-soft); transition: transform 150ms ease, background-color 150ms ease, border-color 150ms ease; }
.skill-chip:hover { transform: translateY(-1px); background: rgba(255,255,255,0.055); border-color: var(--border-strong); }
.skill-chip img { width: 18px; height: 18px; flex: 0 0 auto; }
.skill-chip span { font-size: 0.89rem; font-weight: 700; }

/* Education / Principles */
.education-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); align-items: start; gap: clamp(2.5rem, 6vw, 5rem); }
.education-list { display: grid; gap: 0; }
.education-list > .section-kicker { margin-bottom: 1.15rem; }
.education-card { padding: 1.6rem 0; border-top: 1px solid var(--border); display: grid; gap: 0.55rem; }
.education-card:last-child { border-bottom: 1px solid var(--border); }
.education-degree { color: var(--text-soft); font-size: 1rem; font-weight: 700; }
.education-degree span, .credential-list p span { color: var(--text-muted); font-weight: 400; }
.education-meta { color: var(--text-soft); font-family: var(--mono); font-size: 0.82rem; }
.credentials { padding-top: 0; }
.credentials-heading { display: grid; gap: 0.55rem; margin-bottom: 1.15rem; }
.credentials-heading h3 { font-size: clamp(1.35rem, 2.4vw, 1.8rem); }
.credential-list { border-top: 1px solid var(--border); list-style: none; margin: 0; padding: 0; }
.credential-list li { display: grid; grid-template-columns: 4.25rem minmax(0, 1fr); gap: 1rem; padding: 1.05rem 0; border-bottom: 1px solid var(--border); }
.credential-list time { color: var(--accent-strong); font-family: var(--mono); font-size: 0.8rem; font-weight: 700; padding-top: 0.16rem; }
.credential-list li > div { display: grid; gap: 0.35rem; }
.credential-list strong { font-size: 0.96rem; line-height: 1.4; }
.credential-list p { color: var(--text-soft); font-size: 0.88rem; line-height: 1.5; }
.muted { color: var(--text-muted); }
.principles-grid { display: grid; grid-template-columns: repeat(2, 1fr); border-top: 1px solid var(--border); }
.principle { min-height: 220px; padding: 2rem; border-right: 1px solid var(--border); border-bottom: 1px solid var(--border); display: grid; align-content: start; gap: 0.8rem; }
.principle:nth-child(2n) { border-right: 0; }
.principle p { color: var(--text-muted); }

/* Contact / Footer */
.contact-section { padding-top: clamp(2rem, 4vw, 4rem); padding-bottom: clamp(4rem, 7vw, 6rem); }
.contact-card { padding: clamp(2rem, 5vw, 4.25rem); border: 1px solid var(--border-strong); border-radius: var(--radius-xl); background: linear-gradient(145deg, rgba(116,167,255,0.09), rgba(255,255,255,0.016) 55%, rgba(125,211,167,0.035)); display: grid; gap: 1.25rem; box-shadow: var(--shadow-lg); }
.contact-card h2 { max-width: 18ch; }
.contact-card p { max-width: 60ch; }
.contact-actions { display: flex; flex-wrap: wrap; gap: 0.75rem; }
.site-footer { position: relative; z-index: 2; border-top: 1px solid var(--border); background: rgba(8,11,15,0.72); }
.footer-grid { min-height: 88px; display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 1rem 2rem; padding-block: 1.5rem; }
.footer-grid small { color: var(--text-muted); }
.footer-links { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 1rem; }
.footer-links a { color: var(--text-muted); text-decoration: none; font-size: 0.88rem; }
.footer-links a:hover { color: var(--text); }

/* Project Archive */
.archive-hero { padding-top: calc(var(--nav-height) + clamp(5rem, 9vw, 8rem)); padding-bottom: clamp(3.5rem, 5vw, 5rem); }
.archive-hero-content { display: grid; gap: 1.25rem; text-align: left; }
.archive-hero h1 { max-width: 13ch; font-size: clamp(2.8rem, 6vw, 4.8rem); }
.archive-hero-content > p { max-width: 760px; }
.archive-controls { display: grid; gap: 1rem; margin-bottom: 1.5rem; }
.filter-group { display: flex; flex-wrap: wrap; gap: 0.6rem; }
.filter-button { min-height: 42px; padding: 0.55rem 0.8rem; border: 1px solid var(--border); border-radius: 9px; background: rgba(255,255,255,0.025); color: var(--text-muted); cursor: pointer; transition: background-color 150ms ease, border-color 150ms ease, color 150ms ease; }
.filter-button:hover, .filter-button.is-active { color: var(--text); border-color: var(--border-strong); background: var(--surface-soft); }
.filter-status { color: var(--text-muted); font-size: 0.84rem; }
.archive-list { border-top: 1px solid var(--border); }
.archive-project { display: grid; grid-template-columns: 90px minmax(0, 1fr) auto; gap: 1.5rem; padding: 2.1rem 0; border-bottom: 1px solid var(--border); }
.archive-project[hidden] { display: none; }
.archive-year { color: var(--text-muted); font-family: var(--mono); font-size: 0.78rem; }
.archive-main { display: grid; gap: 0.85rem; }
.archive-main > p:not(.project-index) { max-width: 78ch; color: var(--text-muted); }
.archive-details { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; margin: 0.3rem 0; }
.archive-details div { display: grid; gap: 0.35rem; padding: 0.85rem; border: 1px solid var(--border); border-radius: var(--radius-sm); background: rgba(255,255,255,0.018); }
.archive-details strong { font-size: 0.75rem; }
.archive-details span { color: var(--text-muted); font-size: 0.8rem; }
.archive-links { display: flex; flex-direction: column; align-items: flex-end; gap: 0.55rem; white-space: nowrap; }

/* Animations */
.js .reveal { opacity: 0; transform: translateY(15px); transition: opacity 500ms ease, transform 500ms ease; }
.js .reveal.is-visible { opacity: 1; transform: none; }

/* Responsive */
@media (max-width: 1000px) {
  .hero { min-height: auto; }
  .hero-grid { grid-template-columns: 1fr; }
  .hero-copy { max-width: 760px; }
  .hero-terminal-wrap { max-width: 620px; justify-self: start; }
  .impact-grid { grid-template-columns: repeat(2, 1fr); }
  .impact-item:nth-child(2) { border-right: 0; }
  .impact-item:nth-child(-n + 2) { border-bottom: 1px solid var(--border); }
  .featured-project, .domain-grid { grid-template-columns: 1fr; }
  .featured-project-reverse .project-copy, .featured-project-reverse .project-visual, .domain-grid-reverse .domain-copy, .domain-grid-reverse .flow-card { order: initial; }
  .project-visual { min-height: 340px; }
  .expertise-grid { grid-template-columns: 1fr; }
  .expertise-card { min-height: auto; }
  .education-grid { grid-template-columns: 1fr; gap: 3rem; }
  .archive-project { grid-template-columns: 72px minmax(0, 1fr); }
  .archive-links { grid-column: 2; flex-direction: row; align-items: flex-start; }
}

@media (max-width: 760px) {
  :root { --nav-height: 62px; }
  .container { width: min(100% - 1.5rem, var(--container)); }
  .section-shell { padding-block: clamp(3.5rem, 10vw, 4.5rem); }
  .site-header { height: var(--nav-height); }
  .nav-shell { min-height: var(--nav-height); }
  .nav-toggle { display: block; position: relative; z-index: 22; }
  .nav-toggle[aria-expanded="true"] span[aria-hidden="true"]:first-of-type { transform: translateY(3.25px) rotate(45deg); }
  .nav-toggle[aria-expanded="true"] span[aria-hidden="true"]:last-of-type { transform: translateY(-3.25px) rotate(-45deg); }
  .primary-nav {
    position: absolute;
    top: calc(var(--nav-height) - 1px);
    left: 0;
    right: 0;
    display: grid;
    gap: 0;
    padding: 0.7rem 0.75rem 1rem;
    background: rgba(11, 15, 20, 0.98);
    border-bottom: 1px solid var(--border);
    transform: translateY(-10px);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 150ms ease, transform 150ms ease, visibility 150ms linear;
  }
  .primary-nav.is-open { transform: none; opacity: 1; visibility: visible; pointer-events: auto; }
  .primary-nav a { min-height: 46px; display: flex; align-items: center; padding: 0 0.65rem; border-radius: 8px; }
  .primary-nav a:hover { background: var(--surface-soft); }
  .primary-nav .button.nav-resume { min-height: 46px; margin-top: 0.35rem; justify-content: center; }

  .hero { padding-top: calc(var(--nav-height) + 1.75rem); padding-bottom: 3rem; }
  .hero-grid { gap: 2rem; }
  h1 { font-size: clamp(2.85rem, 13vw, 4.2rem); }
  h2 { font-size: clamp(2rem, 9.5vw, 3rem); }
  .hero-terminal { min-height: 304px; }
  .terminal-body { min-height: 260px; padding: 1rem; font-size: 0.73rem; }
  .terminal-bar { grid-template-columns: 62px 1fr 62px; padding-inline: 0.7rem; }

  .section-intro-row { grid-template-columns: 1fr; }
  .desktop-inline-link { display: none; }
  .mobile-inline-link { display: inline-flex; }
  .impact-grid { grid-template-columns: 1fr; }
  .impact-item { min-height: 118px; border-right: 0; border-bottom: 1px solid var(--border); }
  .impact-item:last-child { border-bottom: 0; }
  .timeline-item { grid-template-columns: 1fr; gap: 1rem; }
  .timeline-meta { grid-auto-flow: column; justify-content: start; gap: 1rem; }
  .credential-list li { grid-template-columns: 3.5rem minmax(0, 1fr); gap: 0.75rem; }
  .featured-projects { gap: 2.8rem; }
  .featured-project { gap: 1.5rem; padding-bottom: 2.8rem; }
  .project-visual { min-height: 300px; padding: 0.7rem; border-radius: var(--radius-lg); }
  .service-diagram { min-height: 220px; }
  .service-arrow { display: none; }
  .service-diagram { display: grid; grid-template-columns: 1fr 1fr; }
  .visual-metrics { grid-template-columns: 1fr; }
  .compression-diagram { display: grid; grid-template-columns: 1fr; padding: 1.25rem; }
  .compression-diagram .diagram-arrow { justify-self: center; transform: rotate(90deg); }
  .planning-diagram { grid-template-columns: 1fr; padding: 1.25rem; }
  .planning-sources { grid-template-columns: 1fr 1fr; }
  .planning-arrow { justify-self: center; transform: rotate(90deg); }
  .principles-grid { grid-template-columns: 1fr; }
  .principle { border-right: 0; }
  .footer-grid { align-items: center; }
  .footer-links { justify-content: flex-end; }
  .archive-project { grid-template-columns: 1fr; gap: 0.8rem; }
  .archive-links { grid-column: auto; }
  .archive-details { grid-template-columns: 1fr; }
}

@media (max-width: 430px) {
  .hero-actions, .contact-actions { display: grid; grid-template-columns: 1fr; }
  .button { width: 100%; }
  .hero-focus { display: grid; gap: 0.4rem; }
  .terminal-title { font-size: 0.64rem; }
  .service-diagram { grid-template-columns: 1fr; }
  .project-facts div { grid-template-columns: 1fr; gap: 0.2rem; }
  .filter-group { display: grid; grid-template-columns: 1fr 1fr; }
  .filter-button { width: 100%; }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; scroll-behavior: auto !important; }
  .ambient-canvas { display: none; }
  .js .reveal { opacity: 1; transform: none; }
  .terminal-cursor { animation: none; opacity: 1; }
}