/* ==========================================================================
   Chandraprakash Jha — Data Engineering & Data Quality Portfolio
   Design system: dark, editorial, technical. See README for editing notes.
   ========================================================================== */

:root {
  /* Palette */
  --bg-0: #060810;
  --bg-1: #0b0e17;
  --bg-2: #10141e;
  --surface: #12151f;
  --surface-hover: #171b28;
  --border: #232a3a;
  --border-soft: #1a2029;

  --text-primary: #eef1f6;
  --text-secondary: #9aa5b8;
  --text-muted: #7d88a0;

  --accent: #4f7cff;
  --accent-soft: #7c9cff;
  --accent-dim: rgba(79, 124, 255, 0.14);
  --teal: #2dd4bf;
  --teal-dim: rgba(45, 212, 191, 0.14);
  --good: #34d399;
  --warn: #f0b73c;

  /* Type */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, "Helvetica Neue", Arial, sans-serif;

  /* Layout */
  --container-w: 1180px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;

  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --dur-fast: 0.2s;
  --dur-med: 0.5s;
  --dur-slow: 0.9s;

  --header-bg: rgba(6, 8, 16, 0.72);
  --grid-line: rgba(255, 255, 255, 0.035);
}

/* Light theme — explicit toggle only, dark is the default identity */
:root[data-theme="light"] {
  --bg-0: #f7f8fb;
  --bg-1: #eef0f6;
  --bg-2: #e6e9f1;
  --surface: #ffffff;
  --surface-hover: #f4f5fa;
  --border: #dde1ea;
  --border-soft: #e8eaf1;

  --text-primary: #12151f;
  --text-secondary: #4a5268;
  --text-muted: #6d7690;

  --accent: #3457d5;
  --accent-soft: #2f56d1;
  --accent-dim: rgba(52, 87, 213, 0.08);
  --teal: #0d9488;
  --teal-dim: rgba(13, 148, 136, 0.08);
  --good: #15803d;
  --warn: #b45309;

  --header-bg: rgba(247, 248, 251, 0.78);
  --grid-line: rgba(18, 21, 31, 0.045);
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg-0);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  transition: background-color 0.4s ease, color 0.4s ease;
}
img { max-width: 100%; display: block; }
ul { margin: 0; padding: 0; list-style: none; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, p { margin: 0; }
button { font: inherit; }
svg { display: block; }

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--accent);
  color: #fff;
  padding: 12px 18px;
  border-radius: 0 0 8px 0;
  z-index: 200;
}
.skip-link:focus { left: 0; }

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

.container {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 0 24px;
}

.accent-text {
  background: linear-gradient(100deg, var(--accent-soft), var(--teal));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.section {
  padding: 110px 0;
  position: relative;
}
.section-eyebrow {
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-soft);
  font-weight: 600;
  margin-bottom: 14px;
}
.section-heading {
  font-size: clamp(1.7rem, 3vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.01em;
  max-width: 720px;
  color: var(--text-primary);
}
.section-lead {
  margin-top: 16px;
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 620px;
}

/* ---------- Scroll reveal ---------- */
[data-animate] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity var(--dur-slow) var(--ease), transform var(--dur-slow) var(--ease);
}
[data-animate="fade-in"] { transform: none; }
[data-animate].in-view {
  opacity: 1;
  transform: none;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 13px 26px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  transition: transform var(--dur-fast) var(--ease), box-shadow var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
  border: 1px solid transparent;
}
.btn-primary {
  background: linear-gradient(120deg, var(--accent), #3f6ae8);
  color: #fff;
  box-shadow: 0 8px 24px -8px rgba(79, 124, 255, 0.55);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 28px -8px rgba(79, 124, 255, 0.65); }
.btn-ghost {
  background: transparent;
  color: var(--text-primary);
  border-color: var(--border);
}
.btn-ghost:hover { border-color: var(--accent-soft); background: var(--accent-dim); transform: translateY(-2px); }

/* ==========================================================================
   Header / Nav
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--header-bg);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-soft);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}
.nav-right {
  display: flex;
  align-items: center;
  gap: 18px;
}
.nav-logo {
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: -0.01em;
}
.nav-menu {
  display: flex;
  align-items: center;
  gap: 26px;
}
.nav-link {
  font-size: 0.92rem;
  color: var(--text-secondary);
  font-weight: 500;
  position: relative;
  transition: color var(--dur-fast) var(--ease);
}
.nav-link:hover { color: var(--text-primary); }
.nav-link:not(.nav-cta)::after {
  content: "";
  position: absolute;
  left: 0; bottom: -6px;
  width: 0; height: 1.5px;
  background: var(--accent-soft);
  transition: width var(--dur-fast) var(--ease);
}
.nav-link:not(.nav-cta):hover::after { width: 100%; }
.nav-cta {
  color: var(--text-primary);
  border: 1px solid var(--border);
  padding: 8px 18px;
  border-radius: 999px;
}
.nav-cta:hover { border-color: var(--accent-soft); background: var(--accent-dim); }

/* Theme toggle: candle + match */
.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  flex-shrink: 0;
  padding: 0;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--surface);
  cursor: pointer;
  transition: border-color var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease), transform var(--dur-fast) var(--ease);
}
.theme-toggle:hover { border-color: var(--accent-soft); transform: translateY(-1px); }
.theme-icon {
  width: 19px;
  height: 19px;
  overflow: visible;
}
.theme-icon .candle-body {
  fill: none;
  stroke: var(--text-secondary);
  stroke-width: 1.5;
}
.theme-icon .candle-wick {
  stroke: var(--text-secondary);
  stroke-width: 1.4;
  stroke-linecap: round;
}
.theme-icon .candle-flame {
  fill: var(--warn);
  stroke: none;
  opacity: 0;
  transform: scale(0.4);
  transform-origin: 12px 7.5px;
  transition: opacity var(--dur-med) var(--ease), transform var(--dur-med) var(--ease), filter var(--dur-med) var(--ease);
}
.theme-icon .match {
  stroke: var(--text-muted);
  stroke-width: 1.4;
  stroke-linecap: round;
  transition: opacity var(--dur-med) var(--ease), transform var(--dur-med) var(--ease);
  transform-origin: 4px 20px;
}
.theme-icon .match-head {
  fill: var(--text-muted);
  stroke: none;
  transition: fill var(--dur-med) var(--ease);
}

:root[data-theme="light"] .theme-icon .candle-flame {
  opacity: 1;
  transform: scale(1);
  filter: drop-shadow(0 0 3px rgba(180, 83, 9, 0.55));
}
:root[data-theme="light"] .theme-icon .match {
  opacity: 0;
  transform: rotate(-18deg) translate(-2px, 2px);
}
:root[data-theme="light"] .theme-toggle:hover .theme-icon .candle-flame {
  transform: scale(1.08) rotate(-2deg);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}
.nav-toggle span {
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  transition: transform var(--dur-fast) var(--ease), opacity var(--dur-fast) var(--ease);
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ==========================================================================
   Hero
   ========================================================================== */
.hero {
  position: relative;
  overflow: hidden;
  padding: 90px 0 0;
}
.hero-bg { position: absolute; inset: 0; z-index: 0; pointer-events: none; }
.grid-layer {
  position: absolute; inset: -10% -10%;
  background-image:
    linear-gradient(to right, var(--grid-line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--grid-line) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 30%, black 30%, transparent 75%);
  animation: gridDrift 40s linear infinite;
}
@keyframes gridDrift {
  from { background-position: 0 0, 0 0; }
  to { background-position: 42px 84px, 42px 84px; }
}
.glow-layer {
  position: absolute;
  top: -20%; right: -10%;
  width: 60%; height: 70%;
  background: radial-gradient(circle, rgba(79,124,255,0.16), transparent 65%);
  filter: blur(10px);
}
.glow-layer::after {
  content: "";
  position: absolute;
  bottom: -40%; left: -30%;
  width: 70%; height: 70%;
  background: radial-gradient(circle, rgba(45,212,191,0.10), transparent 65%);
}

.hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
  padding-bottom: 70px;
}
.eyebrow {
  font-size: 0.8rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--teal);
  font-weight: 600;
  margin-bottom: 22px;
}
.hero-title {
  font-size: clamp(2.4rem, 4.6vw, 3.6rem);
  line-height: 1.1;
  font-weight: 750;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}
.hero-role {
  margin-top: 12px;
  font-size: clamp(1.15rem, 2vw, 1.4rem);
  font-weight: 650;
  color: var(--text-primary);
  letter-spacing: -0.005em;
}
.hero-sub {
  margin-top: 22px;
  font-size: 1.12rem;
  color: var(--text-secondary);
  max-width: 520px;
  line-height: 1.6;
}
.hero-meta {
  margin-top: 14px;
  font-size: 0.92rem;
  color: var(--text-muted);
  max-width: 520px;
}
.hero-cta {
  display: flex;
  gap: 14px;
  margin-top: 36px;
  flex-wrap: wrap;
}
.btn-linkedin {
  gap: 9px;
}
.btn-linkedin svg {
  width: 17px;
  height: 17px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.7;
  stroke-linecap: round;
  stroke-linejoin: round;
  flex-shrink: 0;
}

/* Photo */
.hero-visual { display: flex; justify-content: center; }
.photo-frame {
  position: relative;
  width: min(100%, 380px);
  aspect-ratio: 4 / 5;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: linear-gradient(160deg, var(--surface), var(--bg-1));
  border: 1px solid var(--border);
  box-shadow: 0 30px 60px -25px rgba(0,0,0,0.6);
}
.profile-photo {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
  position: relative;
  z-index: 1;
  filter: grayscale(0.08) contrast(1.02);
}
.profile-photo::before { content: ""; } /* n/a for img, placeholder handled via onerror JS */
.photo-frame.no-photo .profile-photo { display: none; }
.photo-frame.no-photo {
  display: flex;
  align-items: center;
  justify-content: center;
}
.photo-frame.no-photo::before {
  content: "CJ";
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 4.5rem;
  font-weight: 700;
  color: var(--border);
  z-index: 1;
}
.photo-frame.no-photo::after {
  content: "Add assets/profile.jpg";
  position: absolute;
  bottom: 20px;
  left: 0; right: 0;
  text-align: center;
  font-size: 0.75rem;
  color: var(--text-muted);
  z-index: 2;
}
.photo-network {
  position: absolute;
  inset: 0;
  z-index: 2;
  width: 100%;
  height: 100%;
  opacity: 0.85;
  mix-blend-mode: screen;
}
.net-lines line {
  stroke: var(--accent-soft);
  stroke-width: 1;
  opacity: 0.35;
}
.net-nodes circle {
  fill: var(--teal);
  opacity: 0.9;
  animation: nodePulse 3.2s ease-in-out infinite;
}
.net-nodes circle:nth-child(2n) { fill: var(--accent-soft); animation-delay: 0.6s; }
.net-nodes circle:nth-child(3n) { animation-delay: 1.2s; }
.net-nodes circle:nth-child(4n) { animation-delay: 1.8s; }
@keyframes nodePulse {
  0%, 100% { opacity: 0.55; r: 3.5; }
  50% { opacity: 1; r: 4.6; }
}
.photo-caption {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  z-index: 3;
  padding: 18px 20px;
  background: linear-gradient(to top, rgba(6,8,16,0.88), transparent);
  font-size: 0.95rem;
  font-weight: 600;
  color: #fff;
}
.photo-caption small {
  display: block;
  font-weight: 400;
  color: rgba(255,255,255,0.7);
  font-size: 0.76rem;
  margin-top: 2px;
}

/* Hero pipeline strip */
.hero-pipeline {
  position: relative;
  z-index: 1;
  border-top: 1px solid var(--border-soft);
  background: linear-gradient(180deg, transparent, rgba(255,255,255,0.012));
  padding: 26px 0;
  overflow-x: auto;
}
.pipeline-track {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-width: max-content;
  margin: 0 auto;
  padding: 0 24px;
}
.pl-node {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  padding: 8px 14px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface);
  animation: nodeLight 9s ease-in-out infinite;
}
.pl-node:nth-child(1) { animation-delay: 0s; }
.pl-node:nth-child(3) { animation-delay: 1.1s; }
.pl-node:nth-child(5) { animation-delay: 2.2s; }
.pl-node:nth-child(7) { animation-delay: 3.3s; }
.pl-node:nth-child(9) { animation-delay: 4.4s; }
.pl-node:nth-child(11) { animation-delay: 5.5s; }
.pl-node:nth-child(13) { animation-delay: 6.6s; }
.pl-node-final { color: var(--teal); border-color: rgba(45,212,191,0.4); }
@keyframes nodeLight {
  0%, 82%, 100% { color: var(--text-muted); border-color: var(--border); background: var(--surface); }
  8%, 20% { color: var(--text-primary); border-color: var(--accent-soft); background: var(--accent-dim); box-shadow: 0 0 18px -4px rgba(79,124,255,0.5); }
}
.pl-arrow {
  width: 22px;
  height: 1px;
  background: var(--border);
  position: relative;
  flex-shrink: 0;
}
.pl-arrow::after {
  content: "";
  position: absolute;
  right: 0; top: 50%;
  width: 5px; height: 5px;
  border-right: 1px solid var(--text-muted);
  border-bottom: 1px solid var(--text-muted);
  transform: translateY(-50%) rotate(-45deg);
}

/* ==========================================================================
   At a Glance
   ========================================================================== */
.at-a-glance {
  border-top: 1px solid var(--border-soft);
  border-bottom: 1px solid var(--border-soft);
  background: var(--bg-1);
  padding: 70px 0;
}
.glance-grid {
  margin-top: 40px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}
.glance-card {
  padding: 32px 28px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  background: var(--surface);
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: transform var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
}
.glance-card:hover { transform: translateY(-3px); border-color: rgba(79,124,255,0.35); }
.glance-number {
  font-size: 2.8rem;
  font-weight: 750;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  font-variant-numeric: tabular-nums;
}
.glance-label {
  color: var(--text-secondary);
  font-size: 0.88rem;
  font-weight: 500;
}
.glance-card-text { justify-content: center; }
.glance-tagline {
  font-size: 1.05rem;
  font-weight: 650;
  color: var(--text-primary);
  line-height: 1.5;
}

/* ==========================================================================
   What I Do — capability cards
   ========================================================================== */
.capability-grid {
  margin-top: 48px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.capability-card {
  padding: 30px 26px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  transition: transform var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease);
}
.capability-card:hover {
  transform: translateY(-4px);
  border-color: rgba(79,124,255,0.4);
  background: var(--surface-hover);
}
.cap-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px; height: 44px;
  border-radius: 10px;
  background: var(--accent-dim);
  color: var(--accent-soft);
  margin-bottom: 18px;
  transition: background var(--dur-fast) var(--ease), transform var(--dur-fast) var(--ease);
}
.capability-card:hover .cap-icon { background: var(--teal-dim); color: var(--teal); transform: scale(1.06); }
.cap-icon svg { width: 22px; height: 22px; stroke: currentColor; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
.capability-card h3 { font-size: 1.08rem; font-weight: 650; margin-bottom: 8px; }
.capability-card p { color: var(--text-secondary); font-size: 0.94rem; line-height: 1.55; }

/* ==========================================================================
   Data Quality Dimensions wheel
   ========================================================================== */
.dq-wheel-wrap {
  margin-top: 50px;
  display: grid;
  grid-template-columns: minmax(320px, 420px) 1fr;
  gap: 56px;
  align-items: center;
}
.dq-wheel {
  position: relative;
  width: 100%;
  max-width: 420px;
  aspect-ratio: 1 / 1;
  margin: 0 auto;
}
.dq-wheel-svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
}
.dq-wheel-svg line {
  stroke: var(--border);
  stroke-width: 1;
}
.dq-hub {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 30%;
  aspect-ratio: 1 / 1;
  border-radius: 50%;
  background: radial-gradient(circle, var(--accent-dim), var(--teal-dim));
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  font-size: 0.86rem;
  font-weight: 700;
  color: var(--text-primary);
  z-index: 2;
  line-height: 1.35;
}
.dq-node {
  position: absolute;
  top: 0; left: 0;
  transform: translate(-50%, -50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  z-index: 2;
  transition: transform var(--dur-fast) var(--ease);
}
.dq-node-dot {
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--surface);
  border: 2px solid var(--border);
  transition: border-color var(--dur-fast) var(--ease), box-shadow var(--dur-fast) var(--ease);
}
.dq-node-label {
  font-size: 0.8rem;
  font-weight: 650;
  color: var(--text-secondary);
  white-space: nowrap;
  transition: color var(--dur-fast) var(--ease);
}
.dq-node:hover { transform: translate(-50%, -50%) scale(1.08); }
.dq-node:hover .dq-node-dot { border-color: var(--teal); box-shadow: 0 0 12px -1px rgba(45,212,191,0.6); }
.dq-node:hover .dq-node-label { color: var(--text-primary); }

.dq-definitions {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px 28px;
  margin: 0;
}
.dq-definitions dt {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--teal);
  letter-spacing: 0.02em;
}
.dq-definitions dd {
  margin: 6px 0 0;
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

@media (max-width: 860px) {
  .dq-wheel-wrap { grid-template-columns: 1fr; gap: 40px; }
}
@media (max-width: 480px) {
  .dq-definitions { grid-template-columns: 1fr; }
}

/* ==========================================================================
   Transformation / core message
   ========================================================================== */
.transformation { background: var(--bg-1); border-top: 1px solid var(--border-soft); border-bottom: 1px solid var(--border-soft); }
.statement {
  text-align: center;
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 700;
  letter-spacing: -0.01em;
  max-width: 800px;
  margin: 0 auto 64px;
  color: var(--text-primary);
}
.flow-diagram { overflow-x: auto; padding: 10px 0 6px; }
.flow-track {
  display: flex;
  align-items: center;
  gap: 4px;
  min-width: max-content;
  margin: 0 auto;
  padding: 0 12px;
  justify-content: center;
}
.flow-node {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  width: 148px;
  flex-shrink: 0;
  text-align: center;
}
.flow-dot {
  width: 14px; height: 14px;
  border-radius: 50%;
  background: var(--surface);
  border: 2px solid var(--border);
}
.flow-node-bad .flow-dot { border-color: var(--warn); box-shadow: 0 0 14px -2px rgba(240,183,60,0.5); }
.flow-node-good .flow-dot { border-color: var(--good); background: var(--good); box-shadow: 0 0 16px -2px rgba(52,211,153,0.6); }
.flow-label { font-size: 0.85rem; font-weight: 600; color: var(--text-secondary); }
.flow-node-bad .flow-label { color: var(--warn); }
.flow-node-good .flow-label { color: var(--good); }
.flow-connector {
  position: relative;
  width: 60px;
  height: 2px;
  background: var(--border);
  flex-shrink: 0;
  overflow: visible;
}
.flow-connector .particle {
  position: absolute;
  top: 50%;
  left: -3px;
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--accent-soft);
  transform: translateY(-50%);
  animation: flowParticle 2.4s linear infinite;
  box-shadow: 0 0 8px 1px rgba(79,124,255,0.7);
}
.flow-connector .particle:nth-child(2) { animation-delay: 0.8s; }
.flow-connector .particle:nth-child(3) { animation-delay: 1.6s; }
@keyframes flowParticle {
  0% { left: -3px; opacity: 0; }
  10% { opacity: 1; }
  90% { opacity: 1; }
  100% { left: 100%; opacity: 0; }
}

/* ==========================================================================
   Experience / industries
   ========================================================================== */
.industry-track {
  position: relative;
  margin-top: 60px;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
}
.industry-line {
  position: absolute;
  top: 6px;
  left: 4%;
  right: 4%;
  height: 1px;
  background: linear-gradient(to right, transparent, var(--border) 10%, var(--border) 90%, transparent);
}
.industry-node { position: relative; padding-top: 30px; }
.ind-marker {
  position: absolute;
  top: 0; left: 0;
  width: 13px; height: 13px;
  border-radius: 50%;
  background: var(--bg-0);
  border: 2px solid var(--accent-soft);
  transition: box-shadow var(--dur-fast) var(--ease), transform var(--dur-fast) var(--ease);
}
.industry-node:hover .ind-marker {
  box-shadow: 0 0 0 6px var(--accent-dim);
  transform: scale(1.1);
}
.industry-node h3 { font-size: 1.02rem; font-weight: 650; margin-bottom: 8px; }
.industry-node p { font-size: 0.87rem; color: var(--text-secondary); line-height: 1.5; }

/* ==========================================================================
   Problems I solve
   ========================================================================== */
.problem-grid {
  margin-top: 48px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}
.problem-grid li {
  padding: 22px 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 2px solid var(--accent);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 0.98rem;
  font-style: italic;
  transition: border-color var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease);
}
.problem-grid li:hover { background: var(--surface-hover); border-left-color: var(--teal); }
.role-statement {
  margin-top: 44px;
  padding: 26px 28px;
  border-radius: var(--radius-md);
  background: linear-gradient(120deg, var(--accent-dim), var(--teal-dim));
  border: 1px solid var(--border);
  font-size: 1rem;
  line-height: 1.9;
  color: var(--text-primary);
}
.role-statement strong { color: var(--teal); margin-right: 6px; }
.role-statement span { font-weight: 600; }
.role-statement i { font-style: normal; color: var(--text-muted); margin: 0 10px; }

/* ==========================================================================
   Approach
   ========================================================================== */
.pipeline-flow {
  margin-top: 48px;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.pf-node {
  padding: 10px 18px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-secondary);
}
.pf-node-final { color: var(--teal); border-color: rgba(45,212,191,0.45); background: var(--teal-dim); }
.pf-arrow {
  width: 20px; height: 1px;
  background: var(--border);
  position: relative;
}
.pf-arrow::after {
  content: "";
  position: absolute;
  right: 0; top: 50%;
  width: 5px; height: 5px;
  border-right: 1px solid var(--text-muted);
  border-bottom: 1px solid var(--text-muted);
  transform: translateY(-50%) rotate(-45deg);
}
.approach-copy {
  margin-top: 34px;
  font-size: 1.08rem;
  color: var(--text-secondary);
  max-width: 640px;
  line-height: 1.7;
}
.trait-tags {
  margin-top: 26px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.trait-tags li {
  padding: 8px 16px;
  border-radius: 999px;
  background: var(--bg-1);
  border: 1px solid var(--border-soft);
  font-size: 0.85rem;
  color: var(--text-primary);
  font-weight: 500;
}

.philosophy-block {
  margin-top: 56px;
  padding-top: 44px;
  border-top: 1px solid var(--border-soft);
}
.philosophy-quote {
  font-size: clamp(1.3rem, 2.4vw, 1.7rem);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text-primary);
  line-height: 1.4;
  max-width: 560px;
}
.philosophy-neq {
  margin-top: 30px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.philosophy-neq li {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 1rem;
  flex-wrap: wrap;
}
.neq-bad { color: var(--text-muted); }
.neq-good { color: var(--text-primary); font-weight: 650; }
.neq-sign {
  color: var(--teal);
  font-weight: 700;
  font-size: 1.1rem;
}

/* ==========================================================================
   Data Trust Score widget
   ========================================================================== */
.trust-score { background: var(--bg-1); border-top: 1px solid var(--border-soft); border-bottom: 1px solid var(--border-soft); }
.ts-widget {
  margin-top: 48px;
  max-width: 640px;
  padding: 36px 38px 34px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: var(--surface);
}
.ts-progress {
  height: 3px;
  border-radius: 999px;
  background: var(--border-soft);
  overflow: hidden;
}
.ts-progress-bar {
  display: block;
  height: 100%;
  width: 12.5%;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--accent), var(--teal));
  transition: width var(--dur-med) var(--ease);
}
.ts-step-count {
  margin-top: 14px;
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-muted);
  font-weight: 600;
}
.ts-question legend {
  margin-top: 22px;
  font-size: 1.15rem;
  font-weight: 650;
  color: var(--text-primary);
  line-height: 1.4;
  padding: 0;
}
.ts-question[hidden] { display: none; }
.ts-options {
  margin-top: 22px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.ts-option {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg-1);
  cursor: pointer;
  font-size: 0.92rem;
  color: var(--text-secondary);
  transition: border-color var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease);
}
.ts-option:hover { border-color: var(--accent-soft); color: var(--text-primary); }
.ts-option input {
  width: 17px; height: 17px;
  flex-shrink: 0;
  accent-color: var(--accent);
}
.ts-option:has(input:checked) {
  border-color: var(--accent-soft);
  background: var(--accent-dim);
  color: var(--text-primary);
}
.ts-nav {
  margin-top: 28px;
  display: flex;
  justify-content: flex-start;
}
.ts-nav .btn { padding: 11px 22px; font-size: 0.88rem; }
.ts-nav .btn:disabled { opacity: 0.4; cursor: not-allowed; transform: none; box-shadow: none; }

.ts-result-label {
  margin-top: 6px;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
}
.ts-score-row {
  margin-top: 18px;
  display: flex;
  align-items: center;
  gap: 18px;
}
.ts-score-number {
  font-size: 1.6rem;
  font-weight: 750;
  color: var(--text-primary);
  font-variant-numeric: tabular-nums;
  flex-shrink: 0;
}
.ts-score-max { font-size: 1rem; color: var(--text-muted); font-weight: 500; }
.ts-meter {
  flex: 1;
  height: 8px;
  border-radius: 999px;
  background: var(--bg-1);
  border: 1px solid var(--border-soft);
  overflow: hidden;
}
.ts-meter-fill {
  display: block;
  height: 100%;
  width: 0%;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--accent), var(--teal));
  transition: width 0.9s var(--ease);
}
.ts-result-message {
  margin-top: 20px;
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.65;
}
.ts-result-actions {
  margin-top: 28px;
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}
.ts-retake {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 0.86rem;
  text-decoration: underline;
  text-underline-offset: 3px;
  cursor: pointer;
  padding: 0;
}
.ts-retake:hover { color: var(--text-secondary); }

@media (max-width: 620px) {
  .ts-widget { padding: 28px 22px 26px; }
  .ts-score-row { flex-direction: column; align-items: flex-start; gap: 10px; }
  .ts-meter { width: 100%; }
}

/* ==========================================================================
   Technical expertise
   ========================================================================== */
.expertise-grid {
  margin-top: 48px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.expertise-card {
  padding: 28px 26px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  background: var(--surface);
  transition: transform var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
}
.expertise-card:hover { transform: translateY(-3px); border-color: rgba(79,124,255,0.35); }
.expertise-card h3 { font-size: 1rem; font-weight: 650; margin-bottom: 10px; color: var(--text-primary); }
.expertise-card p { font-size: 0.9rem; color: var(--text-secondary); line-height: 1.55; }
.tools-placeholder {
  margin-top: 14px;
  font-size: 0.76rem;
  color: var(--text-muted);
  border-top: 1px dashed var(--border);
  padding-top: 12px;
  letter-spacing: 0.03em;
}

/* ==========================================================================
   Technical depth accordion
   ========================================================================== */
.depth-accordion {
  margin-top: 40px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.depth-item {
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--surface);
  overflow: hidden;
}
.depth-item summary {
  padding: 20px 24px;
  cursor: pointer;
  font-size: 1rem;
  font-weight: 650;
  color: var(--text-primary);
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  transition: color var(--dur-fast) var(--ease);
}
.depth-item summary::-webkit-details-marker { display: none; }
.depth-item summary::after {
  content: "";
  width: 9px;
  height: 9px;
  flex-shrink: 0;
  border-right: 1.5px solid var(--text-muted);
  border-bottom: 1.5px solid var(--text-muted);
  transform: rotate(45deg);
  transition: transform var(--dur-fast) var(--ease);
}
.depth-item[open] summary::after { transform: rotate(-135deg); }
.depth-item[open] summary { border-bottom: 1px solid var(--border-soft); }
.depth-item:hover summary { color: var(--accent-soft); }
.depth-item p {
  padding: 4px 24px 22px;
  margin: 0;
  font-size: 0.94rem;
  color: var(--text-secondary);
  line-height: 1.65;
  max-width: 680px;
}

/* ==========================================================================
   Selected Work / Writing
   ========================================================================== */
.writing-teaser { background: var(--bg-1); border-top: 1px solid var(--border-soft); border-bottom: 1px solid var(--border-soft); }
.post-card-meta {
  font-size: 0.74rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--teal);
  font-weight: 600;
}
.post-card-arrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 14px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent-soft);
}

.project-grid {
  margin-top: 44px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
.project-card {
  padding: 30px 28px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  background: var(--surface);
  display: flex;
  flex-direction: column;
  transition: transform var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
}
.project-card:hover { transform: translateY(-3px); border-color: rgba(79,124,255,0.35); }
.project-card h3 {
  margin-top: 10px;
  font-size: 1.12rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.35;
}
.project-card > p:not(.post-card-meta):not(.project-note) {
  margin-top: 14px;
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.6;
}
.project-note {
  margin-top: 12px;
  font-size: 0.78rem;
  color: var(--text-muted);
  font-style: italic;
}
.project-tags {
  margin-top: 18px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.project-tags span {
  padding: 5px 12px;
  border-radius: 999px;
  background: var(--bg-1);
  border: 1px solid var(--border-soft);
  font-size: 0.76rem;
  font-weight: 600;
  color: var(--text-secondary);
}
.project-link {
  margin-top: 20px;
  font-size: 0.88rem;
  font-weight: 650;
  color: var(--accent-soft);
}
.project-link:hover { color: var(--teal); }

.work-feature {
  display: block;
  margin-top: 44px;
  padding: 32px 34px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: linear-gradient(135deg, var(--accent-dim), var(--teal-dim)), var(--surface);
  transition: transform var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
}
.work-feature:hover { transform: translateY(-3px); border-color: rgba(45,212,191,0.5); }
.work-feature h3 {
  margin-top: 10px;
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-primary);
}
.work-feature p:not(.post-card-meta) {
  margin-top: 12px;
  font-size: 0.96rem;
  color: var(--text-secondary);
  max-width: 620px;
  line-height: 1.6;
}
.work-subhead {
  margin-top: 46px;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  font-weight: 600;
}

.writing-grid {
  margin-top: 20px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}
.writing-card {
  padding: 26px 24px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  background: var(--surface);
  transition: transform var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
}
.writing-card:hover { transform: translateY(-3px); border-color: rgba(79,124,255,0.4); }
.writing-card h3 {
  margin-top: 10px;
  font-size: 1.05rem;
  font-weight: 650;
  color: var(--text-primary);
  line-height: 1.4;
}
.writing-all {
  display: inline-block;
  margin-top: 30px;
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--accent-soft);
}
.writing-all:hover { color: var(--teal); }

@media (max-width: 720px) {
  .writing-grid { grid-template-columns: 1fr; }
  .project-grid { grid-template-columns: 1fr; }
  .work-feature { padding: 26px 24px; }
}

/* ==========================================================================
   Final statement
   ========================================================================== */
.final-statement { text-align: center; padding: 130px 0; }
.final-statement-kicker { text-align: center; margin-bottom: 20px; }
.big-statement {
  font-size: clamp(1.9rem, 4.4vw, 3.2rem);
  font-weight: 750;
  line-height: 1.25;
  letter-spacing: -0.015em;
  color: var(--text-secondary);
}
.big-statement .accent-text { font-weight: 750; }

/* ==========================================================================
   Contact
   ========================================================================== */
.contact { background: var(--bg-1); border-top: 1px solid var(--border-soft); }
.contact-links {
  margin-top: 44px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.contact-link {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 22px 22px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  background: var(--surface);
  font-size: 1rem;
  font-weight: 600;
  transition: transform var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease);
}
.contact-link:hover { transform: translateY(-3px); border-color: var(--accent-soft); background: var(--surface-hover); }
.contact-link small { display: block; font-weight: 500; font-size: 0.74rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--text-muted); margin-bottom: 4px; }
.contact-icon { width: 22px; height: 22px; color: var(--accent-soft); flex-shrink: 0; }
.contact-icon svg { width: 100%; height: 100%; stroke: currentColor; fill: none; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer { padding: 44px 0; border-top: 1px solid var(--border-soft); }
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 14px;
}
.footer-brand strong { font-size: 0.95rem; display: block; }
.footer-brand span { font-size: 0.8rem; color: var(--text-muted); }
.footer-copy { font-size: 0.82rem; color: var(--text-muted); }
.footer-linkedin {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  transition: color var(--dur-fast) var(--ease);
}
.footer-linkedin svg {
  width: 16px;
  height: 16px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.7;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.footer-linkedin:hover { color: var(--accent-soft); }

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 980px) {
  .hero-inner { grid-template-columns: 1fr; text-align: center; }
  .hero-content { order: 1; }
  .hero-visual { order: 0; margin-bottom: 8px; }
  .hero-sub { margin-inline: auto; }
  .hero-meta { margin-inline: auto; }
  .hero-cta { justify-content: center; }
  .photo-frame { width: min(100%, 320px); }

  .capability-grid { grid-template-columns: repeat(2, 1fr); }
  .expertise-grid { grid-template-columns: repeat(2, 1fr); }
  .industry-track { grid-template-columns: repeat(3, 1fr); row-gap: 40px; }
  .industry-line { display: none; }
  .contact-links { grid-template-columns: 1fr; }
  .glance-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 720px) {
  .nav-menu {
    position: fixed;
    top: 68px; left: 0; right: 0;
    background: var(--bg-1);
    border-bottom: 1px solid var(--border-soft);
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: 8px 24px 20px;
    transform: translateY(-8px);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--dur-fast) var(--ease), transform var(--dur-fast) var(--ease);
  }
  .nav-menu.is-open { opacity: 1; transform: none; pointer-events: auto; }
  .nav-menu li { width: 100%; }
  .nav-link { display: block; padding: 14px 0; width: 100%; }
  .nav-cta { margin-top: 8px; text-align: center; }
  .nav-toggle { display: flex; }

  .section { padding: 76px 0; }
  .capability-grid { grid-template-columns: 1fr; }
  .expertise-grid { grid-template-columns: 1fr; }
  .problem-grid { grid-template-columns: 1fr; }
  .industry-track { grid-template-columns: repeat(2, 1fr); }
  .glance-grid { grid-template-columns: 1fr; }
  .role-statement { line-height: 2.1; }
  .flow-track { padding: 0 4px; }
}

/* ==========================================================================
   Reduced motion
   ========================================================================== */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
  [data-animate] { opacity: 1; transform: none; }
}