/* ============================================================
   VASANTH A — Portfolio
   Design: restrained · technical · typography-first
   ============================================================ */

/* ── TOKENS ─────────────────────────────────────────────── */
:root {
  --bg-base:     #0a0a0f;
  --bg-surface:  #111117;
  --bg-raised:   #16161e;
  --border:      #1e1e28;
  --border-dim:  #161620;

  --text:        #e8e8f0;
  --text-2:      #9090a0;
  --text-3:      #50505e;

  --accent:      #4f8ef7;
  --accent-dim:  rgba(79, 142, 247, 0.12);
  --amber:       #f59e0b;
  --amber-dim:   rgba(245, 158, 11, 0.10);
  --green:       #22c55e;
  --green-dim:   rgba(34, 197, 94, 0.10);
  --red:         #ef4444;
  --red-dim:     rgba(239, 68, 68, 0.10);

  --dot-color:   #1e1e2a;

  --font-sans:   'Inter', system-ui, -apple-system, sans-serif;
  --font-mono:   'JetBrains Mono', 'Fira Code', monospace;

  --nav-h:       60px;
  --max-w:       960px;
  --max-w-wide:  1120px;

  --radius:      6px;
  --radius-sm:   4px;
}

/* ── RESET ───────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-sans);
  background: var(--bg-base);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button { border: none; background: none; cursor: pointer; font-family: inherit; }
ul, ol { list-style: none; }
code, pre { font-family: var(--font-mono); }

/* ── BACKGROUND TEXTURE ──────────────────────────────────── */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image: radial-gradient(circle, var(--dot-color) 1px, transparent 1px);
  background-size: 32px 32px;
  pointer-events: none;
  z-index: 0;
}

/* ── TYPOGRAPHY ──────────────────────────────────────────── */
.t-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-3);
}

.t-section-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.5rem;
}

h1, h2, h3, h4 { line-height: 1.25; font-weight: 600; color: var(--text); }

h1 { font-size: clamp(2.5rem, 5vw, 3.75rem); letter-spacing: -0.03em; font-weight: 700; }
h2 { font-size: clamp(1.5rem, 3vw, 2rem); letter-spacing: -0.02em; }
h3 { font-size: 1.15rem; font-weight: 600; }
h4 { font-size: 0.95rem; font-weight: 500; }

p { color: var(--text-2); line-height: 1.7; }
p + p { margin-top: 0.875rem; }

strong { color: var(--text); font-weight: 600; }
em { color: var(--text); font-style: italic; }

.mono { font-family: var(--font-mono); }

/* ── LAYOUT UTILITIES ────────────────────────────────────── */
.container {
  max-width: var(--max-w);
  margin-inline: auto;
  padding-inline: clamp(1rem, 5vw, 2rem);
}

.container--wide {
  max-width: var(--max-w-wide);
  margin-inline: auto;
  padding-inline: clamp(1rem, 5vw, 2rem);
}

section {
  position: relative;
  z-index: 1;
  padding-block: clamp(4rem, 8vw, 6rem);
  border-bottom: 1px solid var(--border-dim);
}

section:last-of-type { border-bottom: none; }

/* ── REVEAL ──────────────────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.4s ease, transform 0.4s ease;
}
.reveal.visible { opacity: 1; transform: none; }
.reveal-d1 { transition-delay: 0.08s; }
.reveal-d2 { transition-delay: 0.16s; }
.reveal-d3 { transition-delay: 0.24s; }
.reveal-d4 { transition-delay: 0.32s; }

/* ── TAGS ────────────────────────────────────────────────── */
.tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.04em;
  color: var(--text-2);
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.15rem 0.5rem;
}

.tag--amber { color: var(--amber); border-color: rgba(245,158,11,0.25); background: var(--amber-dim); }
.tag--green { color: var(--green); border-color: rgba(34,197,94,0.25); background: var(--green-dim); }
.tag--blue  { color: var(--accent); border-color: rgba(79,142,247,0.25); background: var(--accent-dim); }
.tag--red   { color: var(--red); border-color: rgba(239,68,68,0.25); background: var(--red-dim); }

/* ── BUTTONS ─────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.85rem;
  font-weight: 500;
  padding: 0.55rem 1.1rem;
  border-radius: var(--radius);
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}

.btn--primary {
  background: var(--accent);
  color: #fff;
  border: 1px solid var(--accent);
}
.btn--primary:hover { background: #3d7de8; }

.btn--outline {
  background: transparent;
  color: var(--text-2);
  border: 1px solid var(--border);
}
.btn--outline:hover { border-color: var(--text-3); color: var(--text); }

.btn--ghost {
  background: transparent;
  color: var(--text-2);
  border: 1px solid transparent;
  padding-inline: 0.75rem;
}
.btn--ghost:hover { color: var(--text); }

/* ── NAV ─────────────────────────────────────────────────── */
nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-h);
  background: rgba(10, 10, 15, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding-inline: clamp(1rem, 5vw, 2rem);
  gap: 2rem;
}

.nav-logo {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--text);
  flex-shrink: 0;
}
.nav-logo span { color: var(--accent); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  margin-left: auto;
}

.nav-links a {
  font-size: 0.8rem;
  color: var(--text-2);
  transition: color 0.15s;
  white-space: nowrap;
}
.nav-links a:hover { color: var(--text); }

.nav-links .nav-cta {
  color: var(--accent);
  border: 1px solid rgba(79,142,247,0.3);
  border-radius: var(--radius-sm);
  padding: 0.3rem 0.75rem;
  font-size: 0.78rem;
}
.nav-links .nav-cta:hover { background: var(--accent-dim); }

.hamburger {
  display: none;
  flex-direction: column;
  gap: 4px;
  padding: 4px;
  margin-left: auto;
}
.hamburger span {
  display: block;
  width: 20px;
  height: 1.5px;
  background: var(--text-2);
  transition: transform 0.2s, opacity 0.2s;
}

.nav-mobile {
  display: none;
  position: fixed;
  top: var(--nav-h);
  left: 0;
  right: 0;
  /* fully opaque — no bleed-through from dot grid or page content */
  background: #0a0a0f;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 1.25rem clamp(1rem, 5vw, 2rem);
  flex-direction: column;
  gap: 0;
  z-index: 99;
}
.nav-mobile.open { display: flex; }
.nav-mobile a {
  font-size: 0.95rem;
  color: var(--text-2);
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--border-dim);
  display: block;
}
.nav-mobile a:last-child { border-bottom: none; }
.nav-mobile a:active { color: var(--text); }

/* Backdrop — blocks page content behind open mobile nav */
.nav-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  top: var(--nav-h);
  background: rgba(0, 0, 0, 0.55);
  z-index: 98;
}
.nav-backdrop.open { display: block; }

/* Lock body scroll when mobile nav is open */
body.nav-open { overflow: hidden; }

/* ── HERO ────────────────────────────────────────────────── */
#hero {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-top: calc(var(--nav-h) + clamp(3.5rem, 7vw, 5rem));
  padding-bottom: clamp(3rem, 6vw, 4.5rem);
  border-bottom: 1px solid var(--border-dim);
}

.hero-inner { max-width: var(--max-w); margin-inline: auto; padding-inline: clamp(1rem, 5vw, 2rem); width: 100%; }

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--green);
  margin-bottom: 1.25rem;
}
.hero-eyebrow::before {
  content: '';
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--green);
}

.hero-name {
  font-size: clamp(2.75rem, 6vw, 4.25rem);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1.05;
  margin-bottom: 0.5rem;
  color: var(--text);
}
.hero-name .dim { color: var(--text-3); }

.hero-role {
  font-size: clamp(1rem, 2.5vw, 1.3rem);
  font-weight: 400;
  color: var(--text-2);
  margin-bottom: 1.5rem;
}

.hero-statement {
  font-size: clamp(0.9rem, 1.8vw, 1.05rem);
  color: var(--text-2);
  max-width: 540px;
  line-height: 1.65;
  margin-bottom: 2rem;
}
.hero-statement strong { color: var(--text); font-weight: 500; }

.hero-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 2rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
}

/* Hero bottom context bar */
.hero-context {
  margin-top: clamp(2rem, 5vw, 3rem);
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  max-width: var(--max-w);
}

.hero-context-item {
  padding-right: 1.5rem;
  position: relative;
}

.hero-context-item + .hero-context-item {
  padding-left: 1.5rem;
  padding-right: 1.5rem;
  border-left: 1px solid var(--border);
}

.hero-context-item:last-child {
  padding-right: 0;
}

.hero-context-num {
  font-family: var(--font-mono);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text);
  line-height: 1;
  margin-bottom: 0.3rem;
}

.hero-context-label {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  color: var(--text-3);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  line-height: 1.4;
}

@media (max-width: 500px) {
  .hero-context { grid-template-columns: 1fr 1fr; gap: 1px; background: var(--border); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
  .hero-context-item { background: var(--bg-base); padding: 0.875rem 1rem; border-left: none !important; }
  .hero-context-item:last-child { grid-column: 1 / -1; }
}

/* ── CASE STUDIES (PROJECTS) ─────────────────────────────── */
#projects { padding-bottom: 2rem; }

/* Full-width pre-body strip */
.cs-pre-body {
  margin-bottom: 1.75rem;
}

/* Metrics strip — full width above cs-body */
.cs-metrics-strip {
  display: flex;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg-surface);
  margin-bottom: 1.75rem;
}

.cs-metrics-strip-item {
  flex: 1;
  padding: 0.875rem 1.25rem;
  border-right: 1px solid var(--border);
}
.cs-metrics-strip-item:last-child { border-right: none; }

.cs-metrics-strip-value {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1;
  margin-bottom: 0.25rem;
}
.cs-metrics-strip-value.green { color: var(--green); }
.cs-metrics-strip-value.amber { color: var(--amber); }
.cs-metrics-strip-value.blue  { color: var(--accent); }

.cs-metrics-strip-label {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  color: var(--text-3);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

@media (max-width: 500px) {
  .cs-metrics-strip { flex-wrap: wrap; }
  .cs-metrics-strip-item { flex: 1 1 calc(50% - 1px); }
  .cs-metrics-strip-item:nth-child(2n) { border-right: none; }
  .cs-metrics-strip-item:nth-child(n+3) { border-top: 1px solid var(--border); }
}

.case-study {
  border-top: 1px solid var(--border);
  padding-top: 3rem;
  padding-bottom: 3.5rem;
}
.case-study:first-child { border-top: none; padding-top: 0; }

.cs-header {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  margin-bottom: 0.75rem;
  flex-wrap: wrap;
}

.cs-number {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-3);
  letter-spacing: 0.08em;
  flex-shrink: 0;
}

.cs-title {
  font-size: clamp(1.25rem, 2.5vw, 1.6rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
}

.cs-problem {
  font-size: 0.9rem;
  color: var(--text-2);
  margin-bottom: 2rem;
  max-width: 600px;
  font-style: italic;
}

.cs-body {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
  align-items: start;
}

.cs-body--wide {
  grid-template-columns: 1.2fr 1fr;
}

@media (max-width: 768px) {
  .cs-body, .cs-body--wide { grid-template-columns: 1fr; }
}

.cs-visual {
  position: relative;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg-raised);
  cursor: zoom-in;
}
.cs-visual img {
  width: 100%;
  min-height: 200px;
  object-fit: cover;
  object-position: center top;
  transition: transform 0.3s ease;
  display: block;
}
.cs-visual:hover img { transform: scale(1.02); }

.cs-visual-caption {
  padding: 0.5rem 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text-3);
  border-top: 1px solid var(--border);
  letter-spacing: 0.05em;
}

.cs-content {}

.cs-description {
  font-size: 0.925rem;
  color: var(--text-2);
  margin-bottom: 1.5rem;
  line-height: 1.7;
}
.cs-description strong { color: var(--text); font-weight: 600; }

/* Metrics inline */
.cs-metrics {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
  gap: 0.75rem;
  margin-bottom: 1.5rem;
  padding: 1rem;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.cs-metric-item {}
.cs-metric-value {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text);
  line-height: 1;
  margin-bottom: 0.2rem;
}
.cs-metric-value.amber { color: var(--amber); }
.cs-metric-value.green { color: var(--green); }
.cs-metric-value.blue  { color: var(--accent); }
.cs-metric-label {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  color: var(--text-3);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  line-height: 1.3;
}

/* Trade-offs note */
.cs-tradeoffs {
  margin-bottom: 1.5rem;
  padding: 0.875rem 1rem;
  border-left: 2px solid var(--amber);
  background: var(--amber-dim);
  border-radius: 0 var(--radius) var(--radius) 0;
}
.cs-tradeoffs-label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--amber);
  margin-bottom: 0.4rem;
}
.cs-tradeoffs p {
  font-size: 0.82rem;
  color: var(--text-2);
  line-height: 1.6;
}
.cs-tradeoffs strong { color: var(--amber); font-weight: 500; }

.cs-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-bottom: 1.25rem;
}

.cs-links { display: flex; gap: 0.75rem; flex-wrap: wrap; }

/* Architecture flow diagram */
.arch-flow {
  display: flex;
  flex-direction: column;
  gap: 0;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 1.5rem;
}

.arch-flow-title {
  padding: 0.6rem 0.875rem;
  border-bottom: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-3);
}

.arch-steps {
  padding: 1rem 0.875rem;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.arch-step {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
}

.arch-step-connector {
  display: flex;
  flex-direction: column;
  align-items: center;
  flex-shrink: 0;
  width: 20px;
}

.arch-step-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--border);
  border: 1px solid var(--text-3);
  flex-shrink: 0;
  margin-top: 5px;
}

.arch-step-dot.blue  { background: var(--accent-dim); border-color: var(--accent); }
.arch-step-dot.green { background: var(--green-dim);  border-color: var(--green);  }
.arch-step-dot.amber { background: var(--amber-dim);  border-color: var(--amber);  }

.arch-step-line {
  width: 1px;
  flex: 1;
  min-height: 12px;
  background: var(--border);
  margin-top: 2px;
}

.arch-step-body {
  padding-bottom: 0.75rem;
  flex: 1;
}

.arch-step-name {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text);
  line-height: 1;
  margin-bottom: 0.15rem;
}

.arch-step-detail {
  font-size: 0.73rem;
  color: var(--text-3);
  line-height: 1.4;
}

/* Transformation visual */
.transform-visual {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.transform-item {
  flex: 1;
  min-width: 100px;
  text-align: center;
}

.transform-value {
  font-family: var(--font-mono);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1;
}
.transform-value.before { color: var(--text-3); }
.transform-value.after  { color: var(--green); }

.transform-label {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  color: var(--text-3);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-top: 0.25rem;
}

.transform-arrow {
  font-size: 1.2rem;
  color: var(--text-3);
  flex-shrink: 0;
}

/* ── INCIDENT BOARD (VoteSecure) ─────────────────────────── */
.incident-board {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.incident-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-surface);
  overflow: hidden;
  transition: border-color 0.15s;
}

.incident-card:hover { border-color: var(--text-3); }
.incident-card.open  { border-color: var(--amber); }

.incident-card-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  cursor: pointer;
  user-select: none;
}

.inc-id {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--amber);
  letter-spacing: 0.08em;
  flex-shrink: 0;
  font-weight: 600;
}

.inc-title {
  font-size: 0.8rem;
  color: var(--text-2);
  flex: 1;
  line-height: 1.3;
}

.inc-status {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  color: var(--green);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  flex-shrink: 0;
}

.inc-chevron {
  color: var(--text-3);
  font-size: 0.7rem;
  flex-shrink: 0;
  transition: transform 0.2s;
  margin-left: 0.25rem;
}
.incident-card.open .inc-chevron { transform: rotate(180deg); }

.incident-card-body {
  display: none;
  border-top: 1px solid var(--border);
  padding: 0.875rem 1rem;
}
.incident-card.open .incident-card-body { display: block; }

.inc-meta {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 0.75rem;
}

.inc-section {
  margin-bottom: 0.75rem;
}
.inc-section:last-child { margin-bottom: 0; }

.inc-section-label {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-3);
  margin-bottom: 0.25rem;
}

.inc-section-content {
  font-size: 0.8rem;
  color: var(--text-2);
  line-height: 1.55;
}

.inc-section-content code {
  font-size: 0.75rem;
  color: var(--text-3);
  background: var(--bg-raised);
  padding: 0.05rem 0.25rem;
  border-radius: 3px;
}

/* Phase roadmap */
.phase-roadmap {
  display: flex;
  gap: 0;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}

.phase-item {
  flex: 1;
  min-width: 120px;
  padding: 0.875rem 1rem;
  border: 1px solid var(--border);
  border-right: none;
  background: var(--bg-surface);
  position: relative;
}
.phase-item:first-child { border-radius: var(--radius) 0 0 var(--radius); }
.phase-item:last-child  { border-right: 1px solid var(--border); border-radius: 0 var(--radius) var(--radius) 0; }

.phase-item.done   { border-color: rgba(34,197,94,0.25); }
.phase-item.upcoming { background: transparent; border-style: dashed; border-color: var(--border); }

.phase-number {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  color: var(--text-3);
  letter-spacing: 0.08em;
  margin-bottom: 0.25rem;
}

.phase-title {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 0.2rem;
  line-height: 1.2;
}

.phase-item.upcoming .phase-title { color: var(--text-3); }

.phase-badge {
  font-family: var(--font-mono);
  font-size: 0.58rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.phase-badge.done { color: var(--green); }
.phase-badge.upcoming { color: var(--text-3); }

@media (max-width: 640px) {
  .phase-roadmap { flex-direction: column; }
  .phase-item { border-right: 1px solid var(--border); border-bottom: none; border-radius: 0; }
  .phase-item:first-child { border-radius: var(--radius) var(--radius) 0 0; }
  .phase-item:last-child  { border-bottom: 1px solid var(--border); border-radius: 0 0 var(--radius) var(--radius); }
}

/* ── HOW I WORK ──────────────────────────────────────────── */
.principles-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  margin-top: 2rem;
}

@media (max-width: 640px) {
  .principles-grid { grid-template-columns: 1fr; }
}

.principle-item {
  background: var(--bg-surface);
  padding: 1.5rem;
  position: relative;
}

.principle-num {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text-3);
  letter-spacing: 0.1em;
  margin-bottom: 0.5rem;
}

.principle-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 0.4rem;
}

.principle-desc {
  font-size: 0.82rem;
  color: var(--text-2);
  line-height: 1.6;
}

.principle-project {
  margin-top: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.63rem;
  color: var(--text-3);
  letter-spacing: 0.04em;
}

/* ── ENGINEERING STACK ───────────────────────────────────── */
.stack-table {
  margin-top: 2rem;
  display: flex;
  flex-direction: column;
  gap: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.stack-row {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 1.5rem;
  align-items: baseline;
  padding: 0.875rem 1.25rem;
  border-bottom: 1px solid var(--border-dim);
}
.stack-row:last-child { border-bottom: none; }
.stack-row:nth-child(odd) { background: var(--bg-surface); }
.stack-row:nth-child(even) { background: transparent; }

.stack-category {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-3);
  flex-shrink: 0;
  padding-top: 0.1rem;
}

.stack-items {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  align-items: center;
}

.stack-divider {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-3);
  padding-inline: 0.1rem;
}

@media (max-width: 600px) {
  .stack-row { grid-template-columns: 1fr; gap: 0.5rem; }
}

/* ── MORE WORK ───────────────────────────────────────────── */
.more-work-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  margin-top: 2rem;
}

.more-work-item {
  background: var(--bg-surface);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.mw-category {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-3);
}

.mw-title {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text);
  line-height: 1.3;
}

.mw-desc {
  font-size: 0.8rem;
  color: var(--text-2);
  line-height: 1.55;
  flex: 1;
}

.mw-link {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--accent);
  letter-spacing: 0.04em;
  margin-top: 0.25rem;
  transition: gap 0.15s;
}
.mw-link:hover { gap: 0.5rem; }

.mw-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
}

/* ── TIMELINE (EXPERIENCE) ───────────────────────────────── */
.timeline {
  margin-top: 2rem;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.timeline-item {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 2rem;
  padding-bottom: 2.5rem;
  position: relative;
}

.timeline-item + .timeline-item {
  border-top: 1px solid var(--border-dim);
  padding-top: 2.5rem;
}

@media (max-width: 680px) {
  .timeline-item { grid-template-columns: 1fr; gap: 0.75rem; }
}

.timeline-meta {}

.timeline-date {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-3);
  letter-spacing: 0.04em;
  margin-bottom: 0.5rem;
}

.timeline-company {
  font-size: 0.82rem;
  color: var(--text-2);
  line-height: 1.5;
}

.timeline-company strong {
  display: block;
  font-weight: 600;
  color: var(--text);
  font-size: 0.88rem;
  margin-bottom: 0.2rem;
}

.timeline-sub {
  font-size: 0.72rem;
  color: var(--text-3);
  margin-top: 0.2rem;
}

.timeline-content {}

.timeline-role {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 0.875rem;
}

.timeline-bullets {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.timeline-bullets li {
  font-size: 0.83rem;
  color: var(--text-2);
  line-height: 1.6;
  padding-left: 0.875rem;
  position: relative;
}

.timeline-bullets li::before {
  content: '—';
  position: absolute;
  left: 0;
  color: var(--text-3);
  font-size: 0.7rem;
  top: 0.2rem;
}

.timeline-tools {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

/* ── EDUCATION ───────────────────────────────────────────── */
.edu-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  margin-top: 2rem;
}

@media (max-width: 640px) {
  .edu-grid { grid-template-columns: 1fr; }
}

.edu-item {
  background: var(--bg-surface);
  padding: 1.25rem 1.5rem;
}

.edu-degree {
  font-size: 0.78rem;
  color: var(--text-2);
  margin-bottom: 0.2rem;
}

.edu-field {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 0.3rem;
}

.edu-school {
  font-size: 0.8rem;
  color: var(--text-2);
  line-height: 1.4;
  margin-bottom: 0.75rem;
}

.edu-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.edu-date {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-3);
}

.edu-cgpa {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--accent);
}

.cert-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 1rem;
  padding: 1rem 1.25rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-surface);
}

.cert-name {
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text);
  margin-bottom: 0.2rem;
}

.cert-issuer {
  font-size: 0.75rem;
  color: var(--text-3);
  font-family: var(--font-mono);
}

.cert-verify {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--green);
  letter-spacing: 0.06em;
  white-space: nowrap;
  border: 1px solid rgba(34,197,94,0.25);
  padding: 0.3rem 0.7rem;
  border-radius: var(--radius-sm);
  transition: background 0.15s;
  flex-shrink: 0;
}
.cert-verify:hover { background: var(--green-dim); }

/* ── CONTACT ─────────────────────────────────────────────── */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 3rem;
  align-items: start;
  margin-top: 2rem;
}

@media (max-width: 720px) {
  .contact-layout { grid-template-columns: 1fr; gap: 2rem; }
}

.contact-info {}

.contact-tagline {
  font-size: 0.9rem;
  color: var(--text-2);
  margin-bottom: 1.5rem;
  line-height: 1.65;
}

.contact-links {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.contact-link-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.85rem;
  color: var(--text-2);
  transition: color 0.15s;
}

.contact-link-item:hover { color: var(--text); }

.contact-link-label {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-3);
  width: 56px;
  flex-shrink: 0;
}

.contact-link-value {
  font-size: 0.85rem;
  color: var(--text-2);
}

.contact-link-item:hover .contact-link-value { color: var(--text); }

/* Contact form */
.contact-form { display: flex; flex-direction: column; gap: 0.875rem; }

.form-group { display: flex; flex-direction: column; gap: 0.3rem; }

.form-group label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-3);
}

.form-group input,
.form-group textarea {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.6rem 0.875rem;
  font-family: var(--font-sans);
  font-size: 0.875rem;
  color: var(--text);
  transition: border-color 0.15s;
  width: 100%;
}

.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--text-3); }

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
}

.form-group textarea {
  min-height: 110px;
  resize: vertical;
  font-family: var(--font-sans);
}

.btn-submit {
  align-self: flex-start;
  background: var(--bg-raised);
  border: 1px solid var(--border);
  color: var(--text-2);
  font-size: 0.85rem;
  padding: 0.55rem 1.25rem;
  border-radius: var(--radius);
  transition: border-color 0.15s, color 0.15s;
}
.btn-submit:hover { border-color: var(--text-3); color: var(--text); }
.btn-submit:disabled { opacity: 0.5; cursor: not-allowed; }

#form-status {
  font-size: 0.8rem;
  min-height: 1.2em;
  font-family: var(--font-mono);
}

/* ── LIGHTBOX ────────────────────────────────────────────── */
.lightbox {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.9);
  z-index: 1000;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  cursor: zoom-out;
}
.lightbox.active { display: flex; }
.lightbox img {
  max-width: 90vw;
  max-height: 88vh;
  object-fit: contain;
  border-radius: var(--radius);
  box-shadow: 0 32px 80px rgba(0,0,0,0.5);
}
.lightbox-close {
  position: absolute;
  top: 1rem;
  right: 1.25rem;
  font-size: 1.5rem;
  color: var(--text-2);
  cursor: pointer;
  line-height: 1;
}

/* ── FOOTER ──────────────────────────────────────────────── */
footer {
  position: relative;
  z-index: 1;
  padding: 1.5rem clamp(1rem, 5vw, 2rem);
  border-top: 1px solid var(--border-dim);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.footer-left {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-3);
}

.footer-right {
  display: flex;
  gap: 1.25rem;
  align-items: center;
}

.footer-right a {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-3);
  transition: color 0.15s;
  letter-spacing: 0.04em;
}
.footer-right a:hover { color: var(--text-2); }

/* ── SECTION SCAFFOLD ────────────────────────────────────── */
.section-header { margin-bottom: 0; }
.section-label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.4rem;
}
.section-title {
  font-size: clamp(1.35rem, 2.5vw, 1.75rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 0.5rem;
}
.section-desc {
  font-size: 0.9rem;
  color: var(--text-2);
  max-width: 520px;
  line-height: 1.65;
}

/* ── SCROLLBAR ───────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-base); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-3); }

/* ── RESPONSIVE MOBILE ───────────────────────────────────── */
@media (max-width: 768px) {
  .nav-links { display: none; }
  .hamburger { display: flex; }

  /* Prevent horizontal overflow on narrow viewports */
  section, .container {
    overflow-x: hidden;
  }

  /* Hero — reduce top padding so content isn't buried */
  #hero {
    padding-top: calc(var(--nav-h) + 2rem);
    padding-bottom: 2rem;
  }

  /* Case study grids: stack to single column */
  .cs-body, .cs-body--wide {
    grid-template-columns: 1fr !important;
  }

  /* Metrics strip: 2-across on mobile instead of 4 */
  .cs-metrics-strip {
    grid-template-columns: repeat(2, 1fr);
  }

  /* Phase roadmap: 2-column on mobile */
  .phase-roadmap {
    grid-template-columns: repeat(2, 1fr);
  }

  /* Incident board: single column on mobile */
  .incident-board {
    grid-template-columns: 1fr;
  }

  /* Section spacing — tighter on phone */
  section {
    padding-block: 3rem;
  }

  /* Hero context bar: stack vertically on very narrow */
  .hero-context {
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
  }

  /* Principles grid: single column */
  .principles-grid {
    grid-template-columns: 1fr;
  }

  /* Stack grid: 2 columns */
  .stack-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  /* Timeline: no left margin overflow */
  .timeline {
    padding-left: 0;
  }
  .timeline-item {
    padding-left: 1.25rem;
  }

  /* Full-width metric strips don't overflow */
  .cs-metrics-strip-value {
    font-size: clamp(1.1rem, 4vw, 1.5rem);
  }

  /* Arch flow steps readable at phone width */
  .arch-steps {
    gap: 0.5rem;
  }
}

/* ── REDUCED MOTION ──────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  html { scroll-behavior: auto; }
  .reveal { opacity: 1 !important; transform: none !important; }
}