/* ============================================================
   MUHAMMAD ABDULLAH HAROON — APPLE-INSPIRED DESIGN SYSTEM
   Pure white canvas, soft Apple mist, hairline borders,
   SF Pro / Inter typography, and vibrant Apple gradients.
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=Noto+Nastaliq+Urdu:wght@400;600;700&display=swap');

:root {
  /* Canvas & Surfaces (Apple Light Palette) */
  --white: #ffffff;
  --mist: #f5f5f7;
  --mist-card: #fbfbfd;
  --mist-dark: #ebebf0;
  --hair: #d2d2d7;
  --hair-light: rgba(0, 0, 0, 0.08);

  /* Typography (Apple Ink) */
  --ink: #1d1d1f;
  --ink-2: #6e6e73;
  --ink-3: #6e6e73;
  --ink-4: #a1a1a6;

  /* Accent Colors */
  --blue: #0071e3;
  --blue-hover: #0077ed;
  --link: #0066cc;
  --warn: #ff3b30;
  --ok: #34c759;
  --ok-text: #248a3d;
  --blue-on-dark: #2997ff;
  --purple: #5856d6;
  --orange: #ff9500;

  /* Apple Gradients */
  --apple-grad: linear-gradient(90deg, #2a6cf6 0%, #8e4dff 36%, #e0457b 68%, #ff8a3d 100%);
  --blue-grad: linear-gradient(135deg, #0071e3 0%, #5856d6 100%);

  /* Typography Stacks */
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Inter", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  --urdu: 'Noto Nastaliq Urdu', -apple-system, serif;

  /* Layout & Elevations */
  --nav-h: 52px;
  --section-pad: clamp(64px, 8vw, 112px);
  --r-xl: 24px;
  --r-lg: 18px;
  --r-md: 12px;
  --r-sm: 8px;

  /* Springs & Transitions */
  --spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --ease: cubic-bezier(0.25, 0.1, 0.25, 1);
  --out: cubic-bezier(0.16, 1, 0.3, 1);

  /* Elevation Shadows */
  --card-shadow: 0 2px 14px rgba(0, 0, 0, 0.04), 0 1px 2px rgba(0, 0, 0, 0.02);
  --card-shadow-hover: 0 14px 34px rgba(0, 0, 0, 0.07), 0 2px 6px rgba(0, 0, 0, 0.03);
}

/* ============================================================
   RESET & BASE (Strict Zero Horizontal Overflow)
   ============================================================ */

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 20px);
  -webkit-text-size-adjust: 100%;
  overflow-x: clip;
  width: 100%;
}

body {
  margin: 0;
  padding: 0;
  width: 100%;
  overflow-x: clip;
  min-width: 320px;
  background: var(--white);
  color: var(--ink);
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.5;
  letter-spacing: -0.016em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body.menu-locked {
  overflow: hidden;
}

img, svg {
  display: block;
  max-width: 100%;
  height: auto;
}

a { color: var(--link); text-decoration: none; }
h1, h2, h3, h4, p, ul, ol, figure, dl, dd, dt, blockquote { margin: 0; }
ul, ol { padding: 0; list-style: none; }
button, input, textarea { font: inherit; color: inherit; }
button { cursor: pointer; border: none; background: transparent; }
::selection { background: rgba(0, 113, 227, 0.2); color: var(--ink); }
:focus-visible { outline: 2px solid var(--blue); outline-offset: 3px; border-radius: 6px; }

.skip {
  position: absolute;
  left: -999px;
  top: 12px;
  z-index: 1000;
  padding: 8px 16px;
  background: var(--ink);
  color: var(--white);
  border-radius: 980px;
  font-size: 13px;
  font-weight: 500;
}
.skip:focus { left: 16px; }

.urdu-text {
  font-family: var(--urdu);
  line-height: 2.1;
  direction: rtl;
  font-size: 17px;
}

/* ============================================================
   CONTAINERS & SECTION TONES
   ============================================================ */

.wrap {
  width: 100%;
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 clamp(16px, 3.5vw, 24px);
}

.wrap-wide {
  width: 100%;
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 clamp(16px, 3.5vw, 24px);
}

.section {
  padding-block: var(--section-pad);
  position: relative;
  width: 100%;
}

.tone-white {
  background: var(--white);
  color: var(--ink);
}

.tone-mist {
  background: var(--mist);
  color: var(--ink);
}

.tone-dark, .tone-black, .tone-light {
  background: var(--white);
  color: var(--ink);
}

/* ============================================================
   SHARED TYPOGRAPHY
   ============================================================ */

.eyebrow {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 10px;
}

h2 {
  font-size: clamp(28px, 4.2vw, 50px);
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: -0.03em;
  color: var(--ink);
  text-wrap: balance;
}

.section-lead {
  margin-top: 14px;
  max-width: 38em;
  font-size: clamp(16px, 1.6vw, 19px);
  line-height: 1.5;
  color: var(--ink-2);
  text-wrap: pretty;
}

.gradient-text {
  background-image: var(--apple-grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  -webkit-box-decoration-break: clone;
  box-decoration-break: clone;
}

/* ============================================================
   NAVIGATION — Apple Translucent Glass with Perfect Spacing
   ============================================================ */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 500;
  height: var(--nav-h);
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--hair-light);
  transition: background-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.nav.is-scrolled {
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
  background: rgba(255, 255, 255, 0.94);
}

.nav__inner {
  width: 100%;
  max-width: 1100px;
  height: 100%;
  margin: 0 auto;
  padding: 0 clamp(16px, 3.5vw, 24px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.brand {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: -0.015em;
  color: var(--ink);
  white-space: nowrap;
  flex-shrink: 0;
  transition: opacity 0.2s var(--ease);
}
.brand:hover { opacity: 0.7; }

/* Desktop Navigation Links */
.nav-desktop {
  display: flex;
  align-items: center;
  gap: 2px;
}

.nav-desktop a {
  padding: 6px 9px;
  border-radius: 980px;
  font-size: 13px;
  font-weight: 500;
  color: var(--ink-2);
  white-space: nowrap;
  transition: color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.nav-desktop a:hover {
  color: var(--ink);
  background: rgba(0, 0, 0, 0.04);
}

.nav-desktop a.active {
  color: var(--blue);
  font-weight: 600;
}

/* Nav Actions Cluster */
.nav-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.nav-icon-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  color: var(--ink-2);
  transition: color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.nav-icon-link:hover {
  color: var(--ink);
  background: rgba(0, 0, 0, 0.05);
}

.nav-icon-link svg {
  width: 16px;
  height: 16px;
}

.cv-pill {
  padding: 6px 14px;
  background: var(--ink);
  color: var(--white) !important;
  font-size: 12px;
  font-weight: 600;
  border-radius: 980px;
  transition: transform 0.2s var(--spring), background-color 0.2s var(--ease);
  white-space: nowrap;
}

.cv-pill:hover {
  background: #333336;
  transform: scale(1.04);
}

/* Mobile Hamburger Toggle Button */
.nav-toggle {
  display: none;
  width: 36px;
  height: 36px;
  padding: 0;
  border: none;
  background: transparent;
  cursor: pointer;
  position: relative;
  align-items: center;
  justify-content: center;
  color: var(--ink);
  z-index: 550;
  border-radius: 8px;
  flex-shrink: 0;
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
  transition: transform 0.3s var(--spring), opacity 0.2s var(--ease);
  position: absolute;
}

.nav-toggle span:nth-child(1) { transform: translateY(-4px); }
.nav-toggle span:nth-child(2) { transform: translateY(4px); }

.nav-toggle.is-open span:nth-child(1) { transform: rotate(45deg); }
.nav-toggle.is-open span:nth-child(2) { transform: rotate(-45deg); }

/* Mobile Frosted Glass Overlay Drawer */
.mobile-menu {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(25px) saturate(180%);
  -webkit-backdrop-filter: blur(25px) saturate(180%);
  z-index: 490;
  padding: calc(var(--nav-h) + 20px) 24px 32px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  overflow-y: auto;
  opacity: 0;
  pointer-events: none;
  transform: translateY(-8px);
  transition: opacity 0.3s var(--ease), transform 0.3s var(--ease);
}

.mobile-menu.is-open {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.mobile-menu-links {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.mobile-menu-links a {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--ink);
  padding: 10px 0;
  border-bottom: 1px solid var(--hair-light);
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: color 0.2s var(--ease);
}

.mobile-menu-links a::after {
  content: "›";
  font-size: 22px;
  color: var(--ink-3);
  font-weight: 400;
}

.mobile-menu-links a:hover,
.mobile-menu-links a.active {
  color: var(--blue);
}

.mobile-menu-footer {
  margin-top: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.mobile-socials {
  display: flex;
  gap: 12px;
  justify-content: center;
  padding-top: 12px;
}

.mobile-socials a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--ink-2);
  padding: 8px 14px;
  border-radius: 980px;
  background: var(--mist);
}

/* Tablet & Compact Desktop Navbar Optimization */
@media (max-width: 1060px) {
  .nav-desktop a { padding: 5px 7px; font-size: 12px; }
  .nav-actions .nav-icon-link { display: none; }
}

@media (max-width: 920px) {
  .nav-desktop { display: none; }
  .nav-toggle { display: flex; }
}

/* ============================================================
   HERO — Apple Center Minimalist Landing
   ============================================================ */

.hero {
  min-height: auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: calc(var(--nav-h) + clamp(48px, 9vh, 96px)) clamp(16px, 4vw, 24px) clamp(36px, 6vh, 64px);
  background: var(--white);
  width: 100%;
}

.hero__headline-box {
  max-width: 900px;
  margin: 0 auto;
  width: 100%;
}

.hero__hi {
  display: block;
  font-size: clamp(34px, 7vw, 76px);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.038em;
  color: var(--ink);
  margin-bottom: 12px;
  text-wrap: balance;
  word-break: break-word;
}

.hero__tagline {
  display: block;
  font-size: clamp(22px, 4.2vw, 48px);
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: -0.028em;
  padding-bottom: 0.06em;
  text-wrap: balance;
  word-break: break-word;
}

.hero .lede {
  max-width: 660px;
  margin: 24px auto 0;
  font-size: clamp(16px, 1.7vw, 19px);
  line-height: 1.52;
  color: var(--ink-2);
  text-wrap: pretty;
}

.hero-actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

/* ============================================================
   BUTTONS
   ============================================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 46px;
  padding: 10px 22px;
  border-radius: 980px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.01em;
  transition: transform 0.35s var(--spring), background-color 0.2s var(--ease), border-color 0.2s var(--ease);
  text-decoration: none;
  cursor: pointer;
  white-space: nowrap;
}

.btn:hover { transform: scale(1.03); }
.btn:active { transform: scale(0.98); }

.btn-solid {
  background: var(--blue);
  color: var(--white);
}

.btn-solid:hover {
  background: var(--blue-hover);
  color: var(--white);
}

.btn-ghost {
  background: var(--mist);
  color: var(--ink);
  border: 1px solid var(--hair);
}

.btn-ghost:hover {
  background: var(--mist-dark);
  border-color: #bcbcc0;
}

.btn-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--blue);
  font-size: 15px;
  font-weight: 600;
  padding: 0;
}

.btn-link::after {
  content: " ›";
  font-size: 17px;
  transition: transform 0.25s var(--ease);
}

.btn-link:hover::after {
  transform: translateX(4px);
}

/* ============================================================
   SNAPSHOT & IMPACT METRICS SHOWCASE
   ============================================================ */

.impact-showcase {
  padding: 0 0 clamp(40px, 6vw, 64px);
  background: var(--white);
  width: 100%;
}

.stats-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  max-width: 1080px;
  margin: 0 auto;
}

.stat-card {
  padding: 22px 18px;
  background: var(--mist);
  border: 1px solid var(--hair-light);
  border-radius: var(--r-lg);
  text-align: center;
  transition: transform 0.3s var(--spring), box-shadow 0.3s var(--ease);
}

.stat-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--card-shadow);
}

.stat-card strong {
  display: block;
  font-size: clamp(30px, 3.8vw, 42px);
  font-weight: 800;
  letter-spacing: -0.04em;
  color: var(--ink);
  line-height: 1.05;
  margin-bottom: 6px;
}

.stat-card span {
  display: block;
  font-size: 13px;
  line-height: 1.35;
  color: var(--ink-2);
  font-weight: 500;
}

@media (max-width: 860px) {
  .stats-strip { grid-template-columns: repeat(2, 1fr); gap: 12px; }
}

@media (max-width: 440px) {
  .stats-strip { grid-template-columns: 1fr; gap: 10px; }
  .stat-card { padding: 18px 14px; }
}

/* ============================================================
   ABOUT SECTION — statement headline, portrait, "now" tiles
   ============================================================ */

.about-statement {
  max-width: 22em;
  font-size: clamp(28px, 4.4vw, 52px);
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: -0.032em;
}

.about-grid {
  margin-top: clamp(36px, 5vw, 56px);
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: clamp(28px, 5vw, 56px);
  align-items: center;
}

.about-body {
  display: grid;
  gap: 18px;
  font-size: clamp(16px, 1.6vw, 19px);
  line-height: 1.6;
  color: var(--ink-2);
}

.pull {
  margin: 0;
  padding: 20px 24px;
  background: var(--mist);
  border-left: 4px solid var(--blue);
  border-radius: 0 var(--r-md) var(--r-md) 0;
}

.pull p {
  font-size: clamp(16px, 1.8vw, 19px);
  font-weight: 700;
  line-height: 1.5;
  color: var(--ink);
}

.now-grid {
  margin-top: clamp(36px, 5vw, 56px);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.now-card {
  padding: 22px 20px;
  border-radius: var(--r-lg);
  background: var(--mist);
  border: 1px solid var(--hair-light);
}

.now-card dt {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 10px;
}

.now-card:first-child dt::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--ok);
  box-shadow: 0 0 0 4px rgba(52, 199, 89, 0.18);
}

.now-card dd {
  font-size: 14px;
  line-height: 1.45;
  color: var(--ink-2);
}

.now-card dd strong {
  display: block;
  font-size: 16px;
  line-height: 1.3;
  color: var(--ink);
  margin-bottom: 4px;
}

@media (max-width: 900px) {
  .now-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 720px) {
  .about-grid { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .now-grid { grid-template-columns: 1fr; }
}

/* ============================================================
   RESEARCH INTERESTS — dark Apple-style bento
   ============================================================ */

.tone-ink {
  background: #000000;
  color: #f5f5f7;
}

.tone-ink .eyebrow { color: var(--blue-on-dark); }
.tone-ink h2 { color: #f5f5f7; }
.tone-ink .section-lead { color: #a1a1a6; }

.interests-grid {
  margin-top: 44px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-auto-flow: dense;
  gap: 16px;
}

.interest-card {
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  padding: 28px 24px;
  border-radius: var(--r-xl);
  background: #1d1d1f;
  border: 1px solid rgba(255, 255, 255, 0.07);
  transition: transform 0.35s var(--spring), border-color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.interest-card:hover {
  border-color: rgba(255, 255, 255, 0.18);
  background-color: #232326;
}

.interest-card.wide {
  grid-column: span 2;
  background: radial-gradient(120% 140% at 100% 100%, rgba(88, 86, 214, 0.32) 0%, rgba(0, 113, 227, 0.12) 38%, #1d1d1f 70%);
}

.interest-card.wide p { max-width: 34em; }

.interest-deco {
  position: absolute;
  right: 24px;
  top: 14px;
  font-size: clamp(40px, 6vw, 72px);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.07);
  pointer-events: none;
  user-select: none;
}

.interest-deco.ur {
  font-family: var(--urdu);
  font-weight: 700;
}

.interest-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  background: var(--blue-grad);
  color: #ffffff;
}

.interest-icon svg {
  width: 22px;
  height: 22px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.interest-card h3 {
  position: relative;
  font-size: 19px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: #f5f5f7;
  margin-bottom: 8px;
}

.interest-card.wide h3 { font-size: clamp(21px, 2.2vw, 26px); }

.interest-card p {
  position: relative;
  font-size: 14.5px;
  line-height: 1.55;
  color: #a1a1a6;
}

.interest-tags {
  margin-top: auto;
  padding-top: 18px;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.interest-tags span {
  font-size: 12px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 980px;
  background: rgba(255, 255, 255, 0.08);
  color: #d2d2d7;
}

@media (min-width: 601px) and (max-width: 960px) {
  .interests-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 600px) {
  .interests-grid { grid-template-columns: 1fr; }
  .interest-card.wide { grid-column: auto; }
}

/* ============================================================
   PUBLICATIONS SECTION — Apple High-End Clean Format
   ============================================================ */

.pub-list {
  margin-top: 44px;
  display: grid;
  gap: 32px;
}

.pub-card {
  padding: clamp(24px, 3.5vw, 36px);
  border-radius: var(--r-xl);
  background: var(--white);
  border: 1px solid var(--hair);
  box-shadow: var(--card-shadow);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: center;
  transition: transform 0.35s var(--spring), box-shadow 0.35s var(--ease);
}

.pub-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--card-shadow-hover);
}

.pub-card.reverse {
  direction: rtl;
}

.pub-card.reverse > * {
  direction: ltr;
}

.pub-meta {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--blue);
  margin-bottom: 8px;
}

.pub-title {
  font-size: clamp(20px, 2.3vw, 26px);
  font-weight: 700;
  line-height: 1.22;
  letter-spacing: -0.024em;
  color: var(--ink);
  margin-bottom: 8px;
}

.pub-byline {
  font-size: 14px;
  font-weight: 500;
  color: var(--ink-3);
  margin-bottom: 12px;
}

.pub-desc {
  font-size: 15px;
  line-height: 1.55;
  color: var(--ink-2);
  margin-bottom: 18px;
}

.metric-row {
  display: flex;
  gap: 16px;
  padding: 12px 0;
  border-top: 1px solid var(--hair-light);
  border-bottom: 1px solid var(--hair-light);
  margin-bottom: 20px;
}

.metric-row > div {
  flex: 1;
}

.metric-row strong {
  display: block;
  font-size: 17px;
  font-weight: 700;
  color: var(--ink);
}

.metric-row span {
  display: block;
  font-size: 12px;
  color: var(--ink-3);
}

.pub-fulltitle {
  font-size: 14px;
  font-style: italic;
  line-height: 1.45;
  color: var(--ink-2);
  margin-bottom: 8px;
}

.pub-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.btn-code svg {
  width: 17px;
  height: 17px;
  flex-shrink: 0;
}

.pub-visual,
.project-visual {
  margin: 0;
  border-radius: var(--r-lg);
  overflow: hidden;
  box-shadow: 0 4px 18px rgba(0, 0, 0, 0.05);
  border: 1px solid var(--hair-light);
  background: var(--mist);
}

.pub-visual img,
.project-visual img {
  width: 100%;
  height: auto;
  display: block;
}

@media (max-width: 860px) {
  .pub-card {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .pub-card.reverse { direction: ltr; }
}

@media (max-width: 500px) {
  .metric-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }
  .metric-row > div:last-child {
    grid-column: span 2;
  }
}

/* ============================================================
   WORK / EXPERIENCE SECTION — Vertical Chronological Timeline
   Job titles shown FIRST in big bold black, company below in Apple gray
   ============================================================ */

.experience-timeline {
  margin-top: 40px;
  display: flex;
  flex-direction: column;
}

.experience-item {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 28px;
  padding: 36px 0;
  border-top: 1px solid var(--hair);
  position: relative;
}

.experience-item:last-child {
  border-bottom: 1px solid var(--hair);
}

.exp-date {
  font-size: 14px;
  font-weight: 600;
  color: var(--ink-2);
}

.exp-date strong {
  font-size: 17px;
  color: var(--ink);
  display: block;
  margin-bottom: 4px;
}

.exp-badge {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 980px;
  background: var(--white);
  color: var(--blue);
  margin-top: 8px;
}

/* Job title: big, bold black */
.exp-title {
  font-size: clamp(22px, 2.4vw, 27px);
  font-weight: 800;
  letter-spacing: -0.024em;
  color: #000000;
  margin-bottom: 4px;
  line-height: 1.15;
}

.exp-domain {
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--blue);
  margin-bottom: 6px;
}

/* Company: slightly smaller, less weight, Apple gray */
.exp-company {
  font-size: 15.5px;
  font-weight: 500;
  color: var(--ink-2);
  margin-bottom: 16px;
}

.exp-company .exp-loc {
  color: var(--ink-3);
  font-weight: 400;
}

.exp-points {
  display: grid;
  gap: 12px;
}

.exp-points li {
  position: relative;
  padding-left: 20px;
  font-size: 15.5px;
  line-height: 1.55;
  color: var(--ink-2);
}

.exp-points li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 9px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--blue);
}

@media (max-width: 720px) {
  .experience-item {
    grid-template-columns: 1fr;
    gap: 10px;
    padding: 28px 0;
  }
}

/* ============================================================
   PROJECTS SECTION — Modern Minimal 2026-style
   ============================================================ */

.projects-stack {
  margin-top: 44px;
  display: grid;
  gap: 32px;
}

.project-card {
  padding: clamp(24px, 3.5vw, 36px);
  border-radius: var(--r-xl);
  background: var(--white);
  border: 1px solid var(--hair);
  box-shadow: var(--card-shadow);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: center;
  transition: transform 0.35s var(--spring), box-shadow 0.35s var(--ease);
}

.project-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--card-shadow-hover);
}

.project-card.reverse {
  direction: rtl;
}

.project-card.reverse > * {
  direction: ltr;
}

.project-num {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 6px;
}

.project-title {
  font-size: clamp(22px, 2.4vw, 30px);
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--ink);
  margin-bottom: 12px;
  line-height: 1.15;
}

.project-desc {
  font-size: 15px;
  line-height: 1.55;
  color: var(--ink-2);
  margin-bottom: 18px;
}

.tech-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 22px;
}

.tech-tags span {
  padding: 4px 11px;
  border-radius: 980px;
  background: var(--mist);
  font-size: 13px;
  font-weight: 500;
  color: var(--ink);
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 40px;
  padding: 8px 16px;
  border-radius: 980px;
  background: var(--mist);
  border: 1px solid var(--hair);
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--orange);
  box-shadow: 0 0 0 4px rgba(255, 149, 0, 0.18);
}

/* 2026 Minimal Visual Demo Windows */
.demo-window {
  border-radius: var(--r-lg);
  border: 1px solid var(--hair);
  background: var(--white);
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
  width: 100%;
}

.window-header {
  height: 38px;
  padding: 0 16px;
  background: var(--mist);
  border-bottom: 1px solid var(--hair-light);
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Authentic colored Apple window dots */
.window-dots {
  display: flex;
  gap: 7px;
}

.window-dots span {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  display: inline-block;
}

.window-dots span:nth-child(1) {
  background: #ff5f56;
  border: 0.5px solid #e0443e;
}

.window-dots span:nth-child(2) {
  background: #ffbd2e;
  border: 0.5px solid #dea123;
}

.window-dots span:nth-child(3) {
  background: #27c93f;
  border: 0.5px solid #1aab29;
}

.window-title {
  font-size: 12px;
  font-weight: 600;
  color: var(--ink-3);
  margin-left: 8px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.window-body {
  padding: clamp(18px, 3vw, 24px);
  background: #ffffff;
}

/* Chat Visual */
.chat-stream {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.bubble {
  max-width: 88%;
  padding: 12px 18px;
  border-radius: 18px;
  font-size: 14px;
  line-height: 1.45;
  word-break: break-word;
}

.bubble.user {
  align-self: flex-end;
  background: var(--blue);
  color: var(--white);
  border-bottom-right-radius: 4px;
}

.bubble.agent {
  align-self: flex-start;
  background: var(--mist);
  color: var(--ink);
  border-bottom-left-radius: 4px;
  border: 1px solid var(--hair-light);
}

.chat-meta {
  margin-top: 8px;
  font-size: 12px;
  font-weight: 500;
  color: var(--ok-text);
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

/* Benchmark rows */
.benchmark-rows {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.bm-row {
  display: grid;
  grid-template-columns: 80px 1fr 44px;
  align-items: center;
  gap: 12px;
  font-size: 13px;
}

.bm-track {
  height: 8px;
  border-radius: 4px;
  background: var(--mist);
  overflow: hidden;
}

.bm-fill {
  height: 100%;
  border-radius: 4px;
  background: var(--blue);
}

.bm-fill.warn { background: var(--warn); }
.bm-fill.ok { background: var(--ok); }

@media (max-width: 860px) {
  .project-card {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .project-card.reverse { direction: ltr; }
}

/* ============================================================
   PROCESS SECTION — Vertical Timeline with Glowing Scroll Rail
   ============================================================ */

.process-timeline {
  position: relative;
  margin-top: 48px;
  padding-left: 64px;
  display: flex;
  flex-direction: column;
  gap: 30px;
}

.process-rail {
  position: absolute;
  top: 24px;
  bottom: 24px;
  left: 21px;
  width: 4px;
  background: var(--hair);
  border-radius: 4px;
  overflow: hidden;
}

.process-rail-fill {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  width: 100%;
  height: 0%;
  background: linear-gradient(180deg, #0071e3 0%, #5856d6 100%);
  border-radius: 4px;
  box-shadow: 0 0 14px rgba(0, 113, 227, 0.7);
  transition: height 0.15s ease-out;
}

.process-step-item {
  position: relative;
  transition: transform 0.3s var(--spring);
}

.process-step-item .step-marker {
  position: absolute;
  left: -64px;
  top: 18px;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: var(--white);
  border: 2.5px solid var(--hair);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 800;
  color: var(--ink-3);
  transition: all 0.35s var(--spring);
  z-index: 2;
}

.process-step-item.is-active .step-marker {
  border-color: var(--blue);
  background: var(--blue);
  color: var(--white);
  box-shadow: 0 0 0 6px rgba(0, 113, 227, 0.18), 0 0 16px rgba(0, 113, 227, 0.5);
  transform: scale(1.08);
}

.process-step-item .step-card {
  padding: clamp(20px, 3.5vw, 30px);
  border-radius: var(--r-lg);
  background: var(--white);
  border: 1px solid var(--hair);
  box-shadow: var(--card-shadow);
  transition: all 0.35s var(--ease);
}

.process-step-item.is-active .step-card {
  border-color: rgba(0, 113, 227, 0.35);
  box-shadow: 0 12px 32px rgba(0, 113, 227, 0.08), 0 2px 6px rgba(0, 0, 0, 0.04);
}

.process-step-item .step-phase {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--blue);
  display: block;
  margin-bottom: 6px;
}

.process-step-item h3 {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--ink);
  margin-bottom: 6px;
}

.process-step-item p {
  font-size: 15px;
  line-height: 1.55;
  color: var(--ink-2);
}

@media (max-width: 640px) {
  .process-timeline { padding-left: 48px; gap: 20px; }
  .process-rail { left: 15px; }
  .process-step-item .step-marker { left: -48px; width: 36px; height: 36px; font-size: 12px; top: 14px; }
  .process-step-item .step-card { padding: 18px 20px; }
}

/* ============================================================
   TOOLS & TECH STACK SECTION
   ============================================================ */

.stack-groups {
  margin-top: 40px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.stack-group {
  padding: 24px 18px;
  border-radius: var(--r-lg);
  background: var(--mist);
  border: 1px solid var(--hair-light);
}

.stack-group h3 {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--ink);
  margin-bottom: 16px;
}

.tool-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}

.tool {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 12px;
  background: var(--white);
  border: 1px solid var(--hair-light);
  border-radius: var(--r-md);
  transition: transform 0.2s var(--spring), box-shadow 0.2s var(--ease);
}

.tool:hover {
  transform: translateX(3px);
  box-shadow: var(--card-shadow);
}

.tool img, .tool svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

.tool span {
  font-size: 14px;
  font-weight: 500;
  color: var(--ink);
}

@media (max-width: 960px) {
  .stack-groups { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 480px) {
  .stack-groups { grid-template-columns: 1fr; }
}

/* ============================================================
   EDUCATION & CERTIFICATIONS — SEPARATED AND ELEVATED
   ============================================================ */

.education-card-full {
  margin-top: 40px;
  padding: clamp(24px, 4vw, 40px);
  border-radius: var(--r-xl);
  background: var(--white);
  border: 1px solid var(--hair);
  box-shadow: var(--card-shadow);
}

.uni-header {
  display: flex;
  align-items: center;
  gap: 18px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.uni-crest {
  width: 64px;
  height: 64px;
  border-radius: 16px;
  background: var(--mist);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  border: 1px solid var(--hair-light);
  flex-shrink: 0;
}

.uni-crest img {
  width: 48px;
  height: 48px;
  object-fit: contain;
}

.uni-title h3 {
  font-size: clamp(22px, 2.5vw, 26px);
  font-weight: 800;
  letter-spacing: -0.024em;
  color: var(--ink);
}

.uni-title p {
  font-size: 15px;
  color: var(--ink-2);
}

.degree-box {
  padding: 18px 22px;
  border-radius: var(--r-md);
  background: var(--mist);
  margin-bottom: 24px;
  border: 1px solid var(--hair-light);
}

.degree-box strong {
  display: block;
  font-size: 16.5px;
  color: var(--ink);
  margin-bottom: 4px;
}

.degree-box span {
  font-size: 13.5px;
  color: var(--ink-2);
}

.honors-list {
  display: grid;
  gap: 12px;
}

.honors-list li {
  position: relative;
  padding-left: 22px;
  font-size: 15px;
  line-height: 1.55;
  color: var(--ink-2);
}

.honors-list li::before {
  content: "✦";
  position: absolute;
  left: 0;
  top: 1px;
  font-size: 13px;
  color: var(--blue);
}

/* Dedicated Certifications Grid */
.cert-grid {
  margin-top: 40px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}

.cert-card-link {
  display: flex;
  flex-direction: column;
  padding: clamp(22px, 3vw, 28px);
  border-radius: var(--r-lg);
  background: var(--white);
  border: 1px solid var(--hair);
  box-shadow: var(--card-shadow);
  transition: transform 0.35s var(--spring), box-shadow 0.35s var(--ease), border-color 0.2s var(--ease);
  text-decoration: none;
  color: inherit;
}

.cert-card-link:hover {
  transform: translateY(-3px);
  box-shadow: var(--card-shadow-hover);
  border-color: var(--blue);
}

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

.cert-issuer-badge {
  font-size: 12px;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 980px;
  background: var(--mist);
  color: var(--ink);
}

.cert-verify-link {
  font-size: 13px;
  font-weight: 600;
  color: var(--blue);
  display: flex;
  align-items: center;
  gap: 4px;
}

.cert-card-link h3 {
  font-size: 17.5px;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 8px;
  line-height: 1.25;
}

.cert-card-link p {
  font-size: 14px;
  line-height: 1.5;
  color: var(--ink-2);
  margin-bottom: 14px;
}

.cert-skills {
  margin-top: auto;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.cert-skills span {
  font-size: 11px;
  font-weight: 600;
  padding: 3px 8px;
  border-radius: 6px;
  background: var(--mist);
  color: var(--ink-2);
}

@media (max-width: 860px) {
  .cert-grid { grid-template-columns: 1fr; }
}

/* ============================================================
   CONTACT SECTION & CLICK-TO-COPY
   ============================================================ */

.contact-box {
  max-width: 680px;
  margin: 36px auto 0;
  text-align: center;
  width: 100%;
}

.contact-form {
  background: var(--white);
  padding: clamp(22px, 4vw, 36px);
  border-radius: var(--r-xl);
  border: 1px solid var(--hair);
  box-shadow: var(--card-shadow);
  text-align: left;
  margin-bottom: 36px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 16px;
}

.contact-form label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--ink-2);
  margin-bottom: 6px;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 12px 16px;
  border-radius: var(--r-md);
  border: 1px solid var(--hair);
  background: var(--mist);
  font-size: 15px;
  color: var(--ink);
  transition: border-color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.contact-form input:focus,
.contact-form textarea:focus {
  background: var(--white);
  border-color: var(--blue);
  outline: none;
}

.hp { display: none !important; }

.contact-direct {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  margin-top: 28px;
  width: 100%;
}

/* Click-to-copy email button styling */
.copy-email-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px clamp(16px, 3.5vw, 26px);
  border-radius: 980px;
  background: var(--mist);
  border: 1px solid var(--hair);
  color: var(--ink);
  font-size: clamp(14px, 2.5vw, 22px);
  font-weight: 700;
  letter-spacing: -0.02em;
  cursor: pointer;
  transition: transform 0.3s var(--spring), background-color 0.2s var(--ease), border-color 0.2s var(--ease);
  max-width: 100%;
  word-break: break-all;
}

.copy-email-btn:hover {
  transform: scale(1.02);
  background: #ebebf0;
  border-color: #bcbcc0;
}

.copy-email-btn:active {
  transform: scale(0.97);
}

.copy-email-btn svg {
  width: 18px;
  height: 18px;
  color: var(--blue);
  flex-shrink: 0;
}

.copy-hint {
  font-size: 12px;
  color: var(--ink-3);
  font-weight: 500;
}

.phone-link {
  font-size: 15px;
  font-weight: 600;
  color: var(--ink-2);
}

.phone-link:hover { color: var(--ink); }

/* Apple Toast Notification */
.toast {
  position: fixed;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  z-index: 1000;
  padding: 12px 22px;
  background: rgba(29, 29, 31, 0.94);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  color: #ffffff;
  border-radius: 980px;
  font-size: 13.5px;
  font-weight: 600;
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.22);
  display: flex;
  align-items: center;
  gap: 8px;
  opacity: 0;
  pointer-events: none;
  transition: transform 0.4s var(--spring), opacity 0.3s var(--ease);
  max-width: 90vw;
  text-align: center;
}

.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

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

/* ============================================================
   FOOTER
   ============================================================ */

.footer {
  padding: 28px 0 36px;
  border-top: 1px solid var(--hair-light);
  background: var(--white);
  font-size: 13px;
  color: var(--ink-3);
  width: 100%;
}

.footer .wrap {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

@media (max-width: 600px) {
  .footer .wrap {
    flex-direction: column;
    gap: 8px;
    text-align: center;
  }
}

/* ============================================================
   SCROLL REVEAL ANIMATIONS
   ============================================================ */

.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.75s var(--out), transform 0.75s var(--out);
}

.reveal.in {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
  .process-rail-fill {
    height: 100% !important;
  }
}

/* ============================================================
   STACKING CARDS — publications & projects stick under the nav
   and each next card slides up over the previous one.
   JS sets each card's top and --stack-p (0..1, how covered it is).
   ============================================================ */

.stack-card {
  position: sticky;
  top: calc(var(--nav-h) + 20px);
  transform-origin: 50% 0;
  transform: scale(calc(1 - var(--stack-p, 0) * 0.05));
  transition: box-shadow 0.35s var(--ease);
}

.stack-card:hover {
  transform: scale(calc(1 - var(--stack-p, 0) * 0.05));
}

.stack-card::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: #000000;
  opacity: calc(var(--stack-p, 0) * 0.12);
  pointer-events: none;
}

.pub-list,
.projects-stack {
  padding-bottom: 8px;
}