/* ============================================================
   PORTFOLIO — style.css
   Design system, layout, components, themes, animations.
   ============================================================ */

/* ─── RESET ─────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
img, canvas { display: block; max-width: 100%; }
button { font: inherit; cursor: pointer; background: none; border: none; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

/* ─── TOKENS — LIGHT (DEFAULT) ──────────────────────────── */
:root {
  /* Surfaces */
  --bg:           #fafaf8;
  --bg-2:         #f4f3ef;
  --bg-3:         #eeecea;
  --bg-blur:      rgba(250,250,248,0.92);

  /* Borders */
  --border:       #e2e0da;
  --border-mid:   #ccc9c0;

  /* Text */
  --text:         #2a2825;
  --text-mid:     #6b6760;
  --text-muted:   #9e9b94;

  /* Accents */
  --accent:            #1a56ff;
  --accent-bg:         rgba(26, 86,255,0.07);
  --accent-border:     rgba(26, 86,255,0.22);
  --accent-warm:       #e05a1e;
  --accent-warm-bg:    rgba(224, 90, 30,0.08);
  --accent-warm-border:rgba(224, 90, 30,0.22);
  --accent-green:      #1a8a4a;
  --accent-green-bg:   rgba(26,138, 74,0.08);
  --accent-green-border:rgba(26,138,74,0.22);

  /* Graph */
  --graph-node:          #dddbd4;
  --graph-node-stroke:   #c5c2ba;
  --graph-node-hover:    #ccc9c0;
  --graph-blast:         #e53e3e;
  --graph-upstream:      #7c3aed;
  --graph-edge:          rgba(42,40,37,0.13);
  --graph-edge-blast:    rgba(229,62,62,0.55);
  --graph-edge-upstream: rgba(124,58,237,0.55);
  --graph-label:         #2a2825;
  --graph-bg:            #f0ede8;

  /* Dot texture */
  --dot-color:    rgba(42,40,37,0.06);

  /* Typography */
  --serif:   'Lora', Georgia, serif;
  --display: 'Bricolage Grotesque', sans-serif;
  --mono:    'DM Mono', monospace;

  /* Layout */
  --sidebar-w:   220px;
  --content-max: 660px;
  --sec-pad:     52px;
  --pad-x:       48px;

  /* Motion */
  --ease:  cubic-bezier(0.25, 0, 0.15, 1);
  --dur:   200ms;
}

/* ─── TOKENS — DARK ──────────────────────────────────────── */
[data-theme="dark"] {
  --bg:     #131211;
  --bg-2:   #1c1b19;
  --bg-3:   #252320;
  --bg-blur:rgba(19,18,17,0.92);

  --border:     #2c2a27;
  --border-mid: #3a3733;

  --text:      #e6e4de;
  --text-mid:  #9e9b94;
  --text-muted:#858079;

  --accent:              #4d7aff;
  --accent-bg:           rgba(77,122,255,0.10);
  --accent-border:       rgba(77,122,255,0.28);
  --accent-warm:         #f07040;
  --accent-warm-bg:      rgba(240,112,64,0.10);
  --accent-warm-border:  rgba(240,112,64,0.28);
  --accent-green:        #22a55e;
  --accent-green-bg:     rgba(34,165,94,0.10);
  --accent-green-border: rgba(34,165,94,0.28);

  --graph-node:         #2e2c2a;
  --graph-node-stroke:  #3d3a36;
  --graph-node-hover:   #3a3835;
  --graph-label:        #e6e4de;
  --graph-edge:         rgba(230,228,222,0.11);
  --graph-bg:           #1c1b19;

  --dot-color: rgba(230,228,222,0.04);
}

/* ─── BASE ───────────────────────────────────────────────── */
html {
  scroll-behavior: smooth;
}

body {
  background:  var(--bg);
  color:       var(--text);
  font-family: var(--serif);
  font-size:   16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  overflow-x: hidden;
}

/* ─── DOT-GRID TEXTURE ───────────────────────────────────── */
.bg-texture {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image: radial-gradient(circle, var(--dot-color) 1px, transparent 1px);
  background-size: 26px 26px;
  -webkit-mask-image: radial-gradient(ellipse 90% 90% at 50% 50%, black 40%, transparent 100%);
  mask-image:         radial-gradient(ellipse 90% 90% at 50% 50%, black 40%, transparent 100%);
}

/* ─── LAYOUT ─────────────────────────────────────────────── */
.layout {
  display: flex;
  min-height: 100vh;
  position: relative;
  z-index: 1;
}

.content {
  flex: 1;
  margin-left: var(--sidebar-w);
  padding: 0 var(--pad-x);
  min-width: 0;
}

/* ─── SIDEBAR ────────────────────────────────────────────── */
.sidebar {
  position: fixed;
  top: 0; left: 0;
  width: var(--sidebar-w);
  height: 100vh;
  background: var(--bg-2);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  padding: 32px 22px 28px;
  overflow-y: auto;
  overflow-x: hidden;
  z-index: 200;
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.sidebar-identity {
  margin-bottom: 32px;
}

.sidebar-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--bg-3);
  border: 1.5px solid var(--border-mid);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 500;
  color: var(--text-mid);
  margin-bottom: 14px;
  overflow: hidden;
}

.sidebar-avatar img { width: 100%; height: 100%; object-fit: cover; }

.sidebar-name {
  display: block;
  font-family: var(--display);
  font-weight: 600;
  font-size: 14px;
  letter-spacing: -0.02em;
  color: var(--text);
  line-height: 1.3;
  margin-bottom: 3px;
}

.sidebar-title {
  display: block;
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--text-muted);
  letter-spacing: 0.02em;
}

/* Nav */
.sidebar-nav {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text-mid);
  padding: 7px 10px;
  border-radius: 6px;
  border-left: 2px solid transparent;
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease), border-color var(--dur) var(--ease);
  white-space: nowrap;
}

.nav-link::before {
  content: '';
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--border-mid);
  flex-shrink: 0;
  transition: background var(--dur) var(--ease);
}

.nav-link:hover {
  color: var(--text);
  background: var(--bg-3);
}

.nav-link.is-active {
  color: var(--accent);
  border-left-color: var(--accent);
  background: var(--accent-bg);
}

.nav-link.is-active::before {
  background: var(--accent);
}

/* Sidebar footer */
.sidebar-footer {
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 14px;
}

/* ─── SIDEBAR RESUME BUTTON ──────────────────────────────── */
.sidebar-resume {
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 500;
  color: var(--accent);
  padding: 8px 10px;
  border-radius: 6px;
  border: 1px solid var(--accent-border);
  background: var(--accent-bg);
  transition: all var(--dur) var(--ease);
  width: 100%;
  text-align: center;
}

.sidebar-resume:hover {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.sidebar-resume:active { transform: scale(0.97); }

.theme-toggle {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-mid);
  padding: 7px 10px;
  border-radius: 6px;
  border: 1px solid var(--border);
  transition: all var(--dur) var(--ease);
  width: 100%;
}

.theme-toggle:hover {
  color: var(--text);
  border-color: var(--border-mid);
  background: var(--bg-3);
}

.theme-toggle:active {
  transform: scale(0.96);
}

.theme-icon {
  font-size: 13px;
  line-height: 1;
}

[data-theme="light"] .theme-icon::before { content: '☾'; }
[data-theme="dark"]  .theme-icon::before { content: '☀'; }
[data-theme="light"] .theme-label::after { content: 'Dark mode'; }
[data-theme="dark"]  .theme-label::after { content: 'Light mode'; }

.sidebar-socials {
  display: flex;
  gap: 8px;
}

.sidebar-socials a {
  font-family: var(--mono);
  font-size: 10.5px;
  font-weight: 500;
  color: var(--text-muted);
  padding: 5px 10px;
  border: 1px solid var(--border);
  border-radius: 5px;
  transition: all var(--dur) var(--ease);
  flex: 1;
  text-align: center;
  min-height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.sidebar-socials a:hover {
  color: var(--accent);
  border-color: var(--accent-border);
  background: var(--accent-bg);
}

.sidebar-socials a:active {
  transform: scale(0.96);
}

/* ─── MOBILE HEADER ──────────────────────────────────────── */
.mobile-header {
  display: none;
  position: sticky;
  top: 0;
  z-index: 250;
  background: var(--bg-blur);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  padding: 0 20px;
  height: 56px;
  align-items: center;
  justify-content: space-between;
}

.mobile-name {
  font-family: var(--display);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text);
}

.hamburger {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  padding: 6px;
}

.hamburger span {
  display: block;
  width: 100%;
  height: 1.5px;
  background: var(--text-mid);
  border-radius: 2px;
  transform-origin: center;
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}

.hamburger.is-open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.hamburger.is-open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.hamburger.is-open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* ─── DRAWER OVERLAY ─────────────────────────────────────── */
.drawer-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.4);
  z-index: 190;
  opacity: 0;
  transition: opacity var(--dur) var(--ease);
}

.drawer-overlay.is-visible { opacity: 1; }

/* ─── SECTIONS ───────────────────────────────────────────── */
section {
  max-width: var(--content-max);
  padding: var(--sec-pad) 0;
  border-bottom: 1px solid var(--border);
}

section:last-child { border-bottom: none; }

.section-label {
  font-family: var(--mono);
  font-size: 10.5px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 36px;
}

h1 {
  font-family: var(--display);
  font-weight: 700;
  font-size: clamp(28px, 5vw, 48px);
  line-height: 1.08;
  letter-spacing: -0.03em;
  color: var(--text);
  margin-bottom: 20px;
}

h2 {
  font-family: var(--display);
  font-weight: 700;
  font-size: clamp(22px, 3.5vw, 34px);
  line-height: 1.15;
  letter-spacing: -0.03em;
  color: var(--text);
  margin-bottom: 8px;
}

h3 {
  font-family: var(--display);
  font-weight: 600;
  font-size: 19px;
  letter-spacing: -0.02em;
  color: var(--text);
  margin-bottom: 4px;
}

/* ─── HERO ───────────────────────────────────────────────── */
.hero { 
  padding-top: 80px; 
  position: relative; 
}

/* Premium Radial Glow Background */
.hero-glow-container {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: -1;
  overflow: visible;
  opacity: 0.22;
  transition: opacity var(--dur) var(--ease);
}

[data-theme="dark"] .hero-glow-container {
  opacity: 0.35;
}

.hero-glow {
  position: absolute;
  top: -150px;
  left: -10%;
  width: 120%;
  height: 500px;
  background: radial-gradient(
    circle at 50% 30%,
    var(--accent-bg) 0%,
    transparent 65%
  );
  filter: blur(60px);
  animation: breathing-glow 10s ease-in-out infinite alternate;
}

@keyframes breathing-glow {
  0% {
    transform: scale(0.96) translateY(0);
  }
  100% {
    transform: scale(1.04) translateY(15px);
  }
}

.hero-intro {
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--text-muted);
  margin-bottom: 18px;
}

.hero-intro a {
  color: var(--accent);
  font-weight: 500;
  display: inline-block;
  transition: transform var(--dur) var(--ease), color var(--dur) var(--ease);
}

.hero-intro a:hover {
  color: color-mix(in oklab, var(--accent) 80%, #000);
  transform: translateY(-0.5px) scale(1.02);
}

[data-theme="dark"] .hero-intro a:hover {
  color: color-mix(in oklab, var(--accent) 80%, #fff);
}

.hero-highlight {
  background: linear-gradient(135deg, var(--accent) 0%, color-mix(in oklab, var(--accent) 65%, var(--accent-warm)) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: var(--accent); /* Fallback */
  display: inline;
}

.hero-roles {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 28px;
}

.role-pill {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.03em;
  color: var(--text-mid);
  background: var(--bg-2);
  border: 1px solid var(--border);
  padding: 6px 14px;
  border-radius: 100px;
  cursor: pointer;
  user-select: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: 
    color var(--dur) var(--ease),
    background var(--dur) var(--ease),
    border-color var(--dur) var(--ease),
    transform var(--dur) var(--ease),
    box-shadow var(--dur) var(--ease);
}

.role-pill::before {
  content: '';
  display: inline-block;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: currentColor;
  opacity: 0.35;
  transition: opacity var(--dur) var(--ease), background var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.role-pill:hover:not(.active) {
  color: var(--text);
  border-color: var(--border-mid);
  transform: translateY(-1.5px);
  background: var(--bg-3);
}

.role-pill.active {
  color: var(--accent);
  background: var(--accent-bg);
  border-color: var(--accent-border);
  transform: translateY(-1.5px);
  box-shadow: 
    0 4px 14px var(--accent-bg),
    0 1px 3px rgba(0, 0, 0, 0.01);
}

.role-pill.active::before {
  opacity: 1;
  background-color: var(--accent);
  transform: scale(1.3);
  animation: pill-pulse 2s infinite ease-in-out;
}

@keyframes pill-pulse {
  0% { transform: scale(1.1); box-shadow: 0 0 0 0 var(--accent-border); }
  50% { transform: scale(1.4); box-shadow: 0 0 0 4px rgba(26, 86, 255, 0.22); }
  100% { transform: scale(1.1); box-shadow: 0 0 0 0 var(--accent-border); }
}

[data-theme="dark"] @keyframes pill-pulse {
  0% { transform: scale(1.1); box-shadow: 0 0 0 0 var(--accent-border); }
  50% { transform: scale(1.4); box-shadow: 0 0 0 4px rgba(77, 122, 255, 0.32); }
  100% { transform: scale(1.1); box-shadow: 0 0 0 0 var(--accent-border); }
}

.hero-body {
  font-size: 15.5px;
  color: var(--text-mid);
  line-height: 1.85;
  max-width: 580px;
  margin-bottom: 36px;
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease);
}

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

.hero-ctas {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
  align-items: center;
}

/* Elegant Sliding Underline navigation links */
.hero-ctas a:not(.cta-primary):not(.cta-secondary) {
  position: relative;
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 500;
  color: var(--text-mid);
  padding: 4px 0;
  transition: color var(--dur) var(--ease);
}

.hero-ctas a:not(.cta-primary):not(.cta-secondary)::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 1.5px;
  background-color: var(--accent);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--dur) var(--ease);
}

.hero-ctas a:not(.cta-primary):not(.cta-secondary):hover {
  color: var(--accent);
}

.hero-ctas a:not(.cta-primary):not(.cta-secondary):hover::after {
  transform: scaleX(1);
  transform-origin: left;
}

/* Primary Solid Button CTA */
.hero-ctas a.cta-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--accent);
  color: #fff;
  padding: 9px 20px;
  border-radius: 8px;
  font-family: var(--mono);
  font-size: 12.5px;
  font-weight: 500;
  box-shadow: 
    0 4px 14px var(--accent-bg),
    0 2px 4px rgba(0, 0, 0, 0.05);
  transition: transform var(--dur) var(--ease), background var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.hero-ctas a.cta-primary:hover {
  transform: translateY(-2px);
  background: color-mix(in oklab, var(--accent) 88%, #fff);
  box-shadow: 
    0 6px 20px var(--accent-bg),
    0 2px 6px rgba(0, 0, 0, 0.08);
}

[data-theme="dark"] .hero-ctas a.cta-primary:hover {
  background: color-mix(in oklab, var(--accent) 88%, #fff);
}

.hero-ctas a.cta-primary:active {
  transform: translateY(-0.5px);
}

/* Secondary Glassmorphic Button CTA */
.hero-ctas a.cta-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-blur);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--border-mid);
  color: var(--text-mid);
  padding: 9px 20px;
  border-radius: 8px;
  font-family: var(--mono);
  font-size: 12.5px;
  font-weight: 500;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.02);
  transition: all var(--dur) var(--ease);
}

.hero-ctas a.cta-secondary:hover {
  transform: translateY(-2px);
  color: var(--text);
  border-color: var(--accent-border);
  background: var(--bg-3);
  box-shadow: 
    0 4px 12px rgba(0, 0, 0, 0.03),
    0 1px 3px rgba(0, 0, 0, 0.01);
}

.hero-ctas a.cta-secondary:active {
  transform: translateY(-0.5px);
}

/* ─── ABOUT ──────────────────────────────────────────────── */
.about-body {
  font-size: 15.5px;
  color: var(--text-mid);
  line-height: 1.85;
  margin-bottom: 18px;
  max-width: 600px;
}

.about-body strong { color: var(--text); font-weight: 600; }

.skills-row {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-top: 28px;
}

.skill-chip {
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--text-mid);
  background: var(--bg-2);
  border: 1px solid var(--border);
  padding: 4px 11px;
  border-radius: 4px;
}

/* ─── EXPERIENCE ─────────────────────────────────────────── */
.exp-entry { margin-bottom: 56px; }
.exp-entry + .exp-entry {
  padding-top: 48px;
  border-top: 1px solid var(--border);
}
.exp-entry:last-child { margin-bottom: 0; }

.exp-header {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 6px;
}

.exp-logo {
  width: 40px;
  height: 40px;
  border-radius: 8px;
  background: var(--bg-3);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--mono);
  font-size: 9px;
  font-weight: 500;
  color: var(--text-mid);
  flex-shrink: 0;
  margin-top: 2px;
}

.exp-role {
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--accent);
  font-weight: 500;
  margin-bottom: 2px;
}

.exp-period {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-muted);
  margin-bottom: 22px;
}

.exp-bullets {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 24px;
}

.exp-bullets li {
  font-size: 14.5px;
  color: var(--text-mid);
  padding-left: 18px;
  position: relative;
  line-height: 1.72;
}

.exp-bullets li::before {
  content: '•';
  position: absolute;
  left: 0;
  color: var(--border-mid);
}

.exp-bullets li strong { color: var(--text); font-weight: 600; }

/* ─── PROJECT SUB-CARD (inside exp) ─────────────────────── */
.project-sub {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px 24px;
  margin-top: 16px;
  transition: border-color var(--dur) var(--ease);
}

.project-sub:hover { border-color: var(--border-mid); }

.project-sub-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-bottom: 10px;
}

.project-sub-title {
  font-family: var(--display);
  font-weight: 600;
  font-size: 14.5px;
  color: var(--text);
}

.project-sub-desc {
  font-size: 13.5px;
  color: var(--text-mid);
  line-height: 1.7;
  margin-bottom: 16px;
}

.project-sub-desc strong { color: var(--text); font-weight: 600; }

/* ─── STATUS PILLS ───────────────────────────────────────── */
.status-pill {
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.05em;
  padding: 3px 10px;
  border-radius: 100px;
  white-space: nowrap;
  flex-shrink: 0;
}

.status-complete {
  color: var(--accent-green);
  background: var(--accent-green-bg);
  border: 1px solid var(--accent-green-border);
}

.status-research {
  color: var(--accent-warm);
  background: var(--accent-warm-bg);
  border: 1px solid var(--accent-warm-border);
}

/* ─── METRICS ROW ────────────────────────────────────────── */
.metrics-row {
  display: flex;
  gap: 28px;
  flex-wrap: wrap;
  padding: 14px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  margin-bottom: 14px;
}

.m-item { display: flex; flex-direction: column; }

.m-num {
  font-family: var(--display);
  font-weight: 700;
  font-size: 21px;
  letter-spacing: -0.04em;
  color: var(--text);
  line-height: 1.1;
}

.m-label {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--text-muted);
  letter-spacing: 0.03em;
  margin-top: 2px;
}

/* ─── STACK ROW ──────────────────────────────────────────── */
.stack-row--flush { margin-bottom: 0; }

.stack-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.stack-tag {
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--text-mid);
  background: var(--bg);
  border: 1px solid var(--border);
  padding: 3px 9px;
  border-radius: 4px;
}

/* ─── PROJECT CARD ───────────────────────────────────────── */
.project-card {
  padding: 32px;
  border: 1px solid var(--border);
  border-radius: 12px;
  margin-bottom: 24px;
  background: var(--bg);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.project-card:hover {
  transform: scale(1.01) translateY(-2px);
  border-color: var(--border-mid);
  box-shadow: 0 4px 24px rgba(0,0,0,0.04), 0 2px 6px rgba(0,0,0,0.02);
}

[data-theme="dark"] .project-card:hover {
  box-shadow: 0 8px 28px rgba(0,0,0,0.18), 0 2px 6px rgba(0,0,0,0.08);
}

.project-card:last-child { margin-bottom: 0; }

.project-card-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 12px;
}

.project-card h3 { font-size: 20px; }

.project-card-desc {
  font-size: 14.5px;
  color: var(--text-mid);
  line-height: 1.85;
  margin-bottom: 20px;
}

.project-card-desc strong { color: var(--text); font-weight: 600; }
.project-card-desc em     { font-style: italic; }
.project-card-desc code {
  font-family: var(--mono);
  font-size: 12.5px;
  background: var(--bg-3);
  padding: 1px 5px;
  border-radius: 3px;
}

/* ─── PIPELINE DIAGRAM ───────────────────────────────────── */
.project-pipeline {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 4px;
  padding: 11px 14px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 7px;
  margin-bottom: 20px;
}

.pipe-step {
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border);
  padding: 3px 9px;
  border-radius: 4px;
}

.pipe-arrow {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-muted);
}

/* ─── PROJECT BULLETS ────────────────────────────────────── */
.project-bullets {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 20px;
}

.project-bullets li {
  font-size: 14px;
  color: var(--text-mid);
  padding-left: 18px;
  position: relative;
  line-height: 1.68;
}

.project-bullets li::before {
  content: '›';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-size: 16px;
  line-height: 1.45;
}

.project-bullets li strong { color: var(--text); font-weight: 600; }

/* ─── PROJECT LINKS ──────────────────────────────────────── */
.project-links {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  margin-top: 20px;
  padding-top: 18px;
  border-top: 1px solid var(--border);
}

.p-link {
  font-family: var(--mono);
  font-size: 11.5px;
  font-weight: 500;
  color: var(--accent);
  transition: opacity var(--dur) var(--ease);
}

.p-link:hover { opacity: 0.7; }
.p-link.muted { color: var(--text-muted); }

/* ─── GRAPH DEMO ─────────────────────────────────────────── */
.graph-demo {
  margin: 20px 0;
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  background: var(--graph-bg);
}

.graph-demo-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 16px;
  background: var(--bg-2);
  border-bottom: 1px solid var(--border);
  gap: 12px;
  flex-wrap: wrap;
}

.graph-demo-label {
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--accent);
  font-weight: 500;
}

.graph-demo-hint {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--text-muted);
}

#serviceGraph {
  width: 100%;
  height: 400px;
  display: block;
  cursor: default;
}

.graph-info-strip {
  display: flex;
  align-items: center;
  padding: 8px 16px;
  background: var(--bg-2);
  border-top: 1px solid var(--border);
  min-height: 36px;
  transition: opacity var(--dur) var(--ease);
}

.graph-info-text {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-muted);
}

.graph-info-strip.has-selection .graph-info-text { color: var(--text-mid); }

.info-blast    { color: var(--graph-blast); font-weight: 500; }
.info-upstream { color: var(--graph-upstream); font-weight: 500; }

.graph-legend {
  display: flex;
  gap: 18px;
  padding: 8px 16px;
  background: var(--bg-2);
  border-top: 1px solid var(--border);
  flex-wrap: wrap;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-family: var(--mono);
  font-size: 10px;
  color: var(--text-muted);
}

.legend-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  flex-shrink: 0;
}

.legend-dot.blast    { background: var(--graph-blast); }
.legend-dot.upstream { background: var(--graph-upstream); }
.legend-dot.selected { background: var(--accent); }

/* ─── WRITING ────────────────────────────────────────────── */
.writing-entries {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 4px;
}

.writing-entry {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  padding: 18px 20px;
  border: 1px solid var(--border);
  border-radius: 10px;
  text-decoration: none;
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
  background: var(--bg);
}

.writing-entry:hover {
  transform: translateY(-2px);
  border-color: var(--border-mid);
  box-shadow: 0 4px 16px rgba(0,0,0,0.05);
}

[data-theme="dark"] .writing-entry:hover {
  box-shadow: 0 4px 16px rgba(0,0,0,0.2);
}

.w-icon {
  width: 38px;
  height: 38px;
  border-radius: 8px;
  background: var(--bg-3);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 17px;
  flex-shrink: 0;
}

.w-body { flex: 1; min-width: 0; }

.w-meta {
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--text-muted);
  margin-bottom: 3px;
}

.w-title {
  font-family: var(--display);
  font-weight: 600;
  font-size: 14.5px;
  color: var(--text);
  line-height: 1.35;
  margin-bottom: 4px;
}

.w-desc {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ─── CONTACT ────────────────────────────────────────────── */
.contact-body {
  font-size: 15px;
  color: var(--text-mid);
  line-height: 1.8;
  margin-bottom: 32px;
  max-width: 520px;
}

.contact-links {
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-width: 420px;
}

.c-link {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--text);
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: 8px;
  transition: all var(--dur) var(--ease);
  background: var(--bg);
}

.c-link:hover {
  border-color: var(--accent-border);
  color: var(--accent);
  background: var(--accent-bg);
}

.c-icon {
  width: 18px;
  text-align: center;
  flex-shrink: 0;
  font-size: 13px;
  color: var(--text-muted);
}

.c-link:hover .c-icon { color: var(--accent); }

/* ─── REVEAL ANIMATIONS ──────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.55s var(--ease), transform 0.55s var(--ease);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger child reveals */
.reveal-stagger > * {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.45s var(--ease), transform 0.45s var(--ease);
}

.reveal-stagger.is-visible > *:nth-child(1) { opacity: 1; transform: translateY(0); transition-delay: 0ms; }
.reveal-stagger.is-visible > *:nth-child(2) { opacity: 1; transform: translateY(0); transition-delay: 60ms; }
.reveal-stagger.is-visible > *:nth-child(3) { opacity: 1; transform: translateY(0); transition-delay: 120ms; }
.reveal-stagger.is-visible > *:nth-child(4) { opacity: 1; transform: translateY(0); transition-delay: 180ms; }
.reveal-stagger.is-visible > *:nth-child(n+5) { opacity: 1; transform: translateY(0); transition-delay: 220ms; }

/* ─── FOOTER ─────────────────────────────────────────────── */
footer {
  max-width: var(--content-max);
  padding: 28px 0 40px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}

.footer-copy {
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  gap: 20px;
}

.footer-links a {
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--text-muted);
  transition: color var(--dur) var(--ease);
}

.footer-links a:hover { color: var(--accent); }

/* ─── RESPONSIVE ─────────────────────────────────────────── */
@media (max-width: 768px) {
  :root {
    --sidebar-w: 0px;
    --pad-x: 20px;
    --sec-pad: 40px;
  }

  .layout { display: block; }

  .sidebar {
    width: 280px;
    transform: translateX(-100%);
    box-shadow: none;
  }

  .sidebar.is-open {
    transform: translateX(0);
    box-shadow: 8px 0 32px rgba(0,0,0,0.12);
  }

  .drawer-overlay { display: block; }

  .mobile-header { display: flex; }

  .content {
    margin-left: 0;
    padding-top: 0;
  }

  section { max-width: 100%; }

  .project-pipeline { display: none; }

  #serviceGraph { height: 260px; }

  footer { flex-direction: column; align-items: flex-start; }

  .hero { padding-top: 52px; }
}

@media (min-width: 1280px) {
  .content { padding-left: 64px; }
}