/* ============================================================
   CUSTOM PROPERTIES
   ============================================================ */
:root {
  --bg:           #EBEEF2;
  --surface:      #FFFFFF;
  --surface-alt:  #F5F7FA;
  --primary:      #4338CA;
  --primary-lt:   #6366F1;
  --primary-sub:  rgba(67,56,202,.09);
  --text:         #14171C;
  --text-2:       #2D3441;
  --muted:        #6B7480;
  --border:       #D6DBE2;
  --border-hov:   #B0BAC9;

  --font-disp: 'Fraunces', Georgia, serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  --r-sm:   6px;
  --r-md:   10px;
  --r-lg:   16px;
  --r-xl:   24px;
  --r-full: 9999px;

  --sh-sm:  0 1px 3px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04);
  --sh-md:  0 4px 16px rgba(0,0,0,.08), 0 2px 4px rgba(0,0,0,.04);
  --sh-lg:  0 12px 40px rgba(0,0,0,.10), 0 4px 12px rgba(0,0,0,.05);
  --sh-xl:  0 24px 64px rgba(0,0,0,.12), 0 8px 24px rgba(0,0,0,.06);
  --sh-pri: 0 8px 28px rgba(67,56,202,.30);

  --t-fast: 150ms cubic-bezier(.4,0,.2,1);
  --t-base: 260ms cubic-bezier(.4,0,.2,1);
  --t-slow: 420ms cubic-bezier(.4,0,.2,1);

  --nav-h: 68px;
  --max-w: 1160px;
  --pad:   clamp(1.25rem, 5vw, 2.5rem);
}

[data-theme="dark"] {
  --bg:           #0D0F14;
  --surface:      #161920;
  --surface-alt:  #1C2030;
  --primary:      #6366F1;
  --primary-lt:   #818CF8;
  --primary-sub:  rgba(99,102,241,.12);
  --text:         #E8EBF0;
  --text-2:       #C5CBD6;
  --muted:        #8892A2;
  --border:       #252A38;
  --border-hov:   #353B50;

  --sh-sm:  0 1px 3px rgba(0,0,0,.25);
  --sh-md:  0 4px 16px rgba(0,0,0,.30);
  --sh-lg:  0 12px 40px rgba(0,0,0,.40);
  --sh-xl:  0 24px 64px rgba(0,0,0,.50);
  --sh-pri: 0 8px 28px rgba(99,102,241,.35);
}

/* ============================================================
   RESET & BASE
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  scroll-padding-top: calc(var(--nav-h) + 1rem);
}

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
  transition: background var(--t-base), color var(--t-base);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 1000;
  width: 0;
  height: 3px;
  background: var(--primary);
  box-shadow: 0 0 18px rgba(67,56,202,.35);
  pointer-events: none;
  transition: width 80ms linear;
}

img    { display: block; max-width: 100%; height: auto; }
a      { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
strong { font-weight: 600; }

/* ============================================================
   TYPOGRAPHY UTILITIES
   ============================================================ */
.section-eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: .74rem;
  font-weight: 500;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: .85rem;
}

.section-heading {
  font-family: var(--font-disp);
  font-size: clamp(1.9rem, 4vw, 2.75rem);
  font-weight: 500;
  line-height: 1.18;
  color: var(--text);
  margin-bottom: 3rem;
  letter-spacing: -.02em;
}
.section-heading em { font-style: italic; color: var(--primary); font-weight: 400; }

/* ============================================================
   LAYOUT
   ============================================================ */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--pad);
}

section { padding: 6rem 0; }

/* ============================================================
   LOADER
   ============================================================ */
.loader {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity .5s ease, visibility .5s ease;
}
.loader.hidden { opacity: 0; visibility: hidden; pointer-events: none; }

.loader__logo {
  font-family: var(--font-disp);
  font-size: 2.75rem;
  font-weight: 600;
  color: var(--primary);
  letter-spacing: -.02em;
  margin-bottom: 1.5rem;
  text-align: center;
  animation: loaderPulse 1.2s ease-in-out infinite;
}
.loader__bar {
  width: 140px;
  height: 2px;
  background: var(--border);
  border-radius: var(--r-full);
  overflow: hidden;
  margin: 0 auto;
}
.loader__progress {
  height: 100%;
  width: 0;
  background: var(--primary);
  border-radius: var(--r-full);
  animation: loaderFill 1.6s cubic-bezier(.4,0,.2,1) forwards;
}

@keyframes loaderPulse { 0%, 100% { opacity: 1; } 50% { opacity: .45; } }
@keyframes loaderFill  { to { width: 100%; } }

/* ============================================================
   BACK TO TOP
   ============================================================ */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 500;
  width: 44px;
  height: 44px;
  border-radius: var(--r-md);
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
  box-shadow: var(--sh-md);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transform: translateY(12px);
  transition: opacity var(--t-base), transform var(--t-base), background var(--t-fast), color var(--t-fast), border-color var(--t-fast);
  pointer-events: none;
}
.back-to-top.visible { opacity: 1; transform: translateY(0); pointer-events: auto; }
.back-to-top:hover   { background: var(--primary); color: #fff; border-color: var(--primary); }

/* ============================================================
   NAVIGATION
   ============================================================ */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 900;
  height: var(--nav-h);
  transition: background var(--t-base), box-shadow var(--t-base);
}
.nav.scrolled {
  background: rgba(235,238,242,.88);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  box-shadow: 0 1px 0 var(--border);
}
[data-theme="dark"] .nav.scrolled { background: rgba(13,15,20,.88); }

.nav__container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--pad);
  height: 100%;
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.nav__logo {
  font-family: var(--font-disp);
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--primary);
  letter-spacing: -.02em;
  flex-shrink: 0;
  transition: opacity var(--t-fast);
}
.nav__logo:hover { opacity: .65; }

.nav__links { display: flex; gap: .15rem; margin-left: auto; }

.nav__link {
  font-size: .875rem;
  font-weight: 500;
  color: var(--muted);
  padding: .4rem .8rem;
  border-radius: var(--r-sm);
  transition: color var(--t-fast), background var(--t-fast);
}
.nav__link:hover, .nav__link.active { color: var(--text); background: var(--surface-alt); }

.nav__actions { display: flex; align-items: center; gap: .4rem; flex-shrink: 0; }

.theme-toggle {
  width: 38px;
  height: 38px;
  border-radius: var(--r-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--muted);
  transition: color var(--t-fast), background var(--t-fast);
}
.theme-toggle:hover { color: var(--text); background: var(--surface-alt); }

[data-theme="light"] .icon-moon { display: none; }
[data-theme="dark"]  .icon-sun  { display: none; }

.nav__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 38px;
  height: 38px;
  align-items: center;
  justify-content: center;
  border-radius: var(--r-sm);
  transition: background var(--t-fast);
}
.nav__hamburger:hover { background: var(--surface-alt); }
.nav__hamburger span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform var(--t-base), opacity var(--t-base);
}
.nav__hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav__hamburger.open span:nth-child(2) { opacity: 0; }
.nav__hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.mobile-menu {
  position: fixed;
  top: var(--nav-h);
  inset-inline: 0;
  z-index: 800;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 1rem var(--pad) 1.5rem;
  transform: translateY(-110%);
  opacity: 0;
  transition: transform var(--t-base), opacity var(--t-base);
  pointer-events: none;
}
.mobile-menu.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
.mobile-menu__links { display: flex; flex-direction: column; gap: .2rem; }
.mobile-menu__link {
  font-size: 1rem;
  font-weight: 500;
  color: var(--muted);
  padding: .65rem .75rem;
  border-radius: var(--r-sm);
  transition: color var(--t-fast), background var(--t-fast);
}
.mobile-menu__link:hover { color: var(--text); background: var(--surface-alt); }

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  font-family: var(--font-body);
  font-size: .875rem;
  font-weight: 600;
  padding: .7rem 1.4rem;
  border-radius: var(--r-md);
  border: 1.5px solid transparent;
  cursor: pointer;
  transition: all var(--t-fast);
  position: relative;
  overflow: hidden;
  white-space: nowrap;
  letter-spacing: .01em;
  text-decoration: none;
}
.btn svg { flex-shrink: 0; }

.btn--primary { background: var(--primary); color: #fff; border-color: var(--primary); box-shadow: var(--sh-pri); }
.btn--primary:hover { background: var(--primary-lt); border-color: var(--primary-lt); transform: translateY(-2px); box-shadow: 0 12px 32px rgba(67,56,202,.40); }

.btn--secondary { background: transparent; color: var(--primary); border-color: var(--primary); }
.btn--secondary:hover { background: var(--primary-sub); transform: translateY(-2px); }

.btn--ghost { background: transparent; color: var(--text-2); border-color: var(--border); }
.btn--ghost:hover { border-color: var(--border-hov); background: var(--surface-alt); transform: translateY(-2px); }

.btn--full { width: 100%; justify-content: center; }

.ripple {
  position: absolute;
  border-radius: 50%;
  background: rgba(255,255,255,.35);
  transform: scale(0);
  animation: rippleAnim .5s linear;
  pointer-events: none;
}
@keyframes rippleAnim { to { transform: scale(4); opacity: 0; } }

/* ============================================================
   SOCIAL BUTTONS
   ============================================================ */
.social-btn {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  font-size: .8125rem;
  font-weight: 500;
  color: var(--muted);
  padding: .45rem .85rem;
  border-radius: var(--r-sm);
  border: 1px solid var(--border);
  background: var(--surface);
  transition: all var(--t-fast);
}
.social-btn:hover { color: var(--primary); border-color: var(--primary); background: var(--primary-sub); transform: translateY(-2px); }

/* ============================================================
   HERO
   ============================================================ */
.hero {
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  padding-top: var(--nav-h);
  background: var(--bg);
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: -200px; right: -200px;
  width: 700px; height: 700px;
  background: radial-gradient(circle, var(--primary-sub) 0%, transparent 70%);
  pointer-events: none;
}

.hero__container {
  max-width: var(--max-w);
  margin: auto;
  padding: 4rem var(--pad) 5rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
  width: 100%;
}

.hero__roles {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem;
  margin-bottom: 1.5rem;
}
.hero__role {
  font-family: var(--font-mono);
  font-size: .78rem;
  font-weight: 500;
  color: var(--muted);
  background: var(--surface);
  border: 1px solid var(--border);
  padding: .3rem .75rem;
  border-radius: var(--r-full);
  letter-spacing: .03em;
  transition: color var(--t-fast), border-color var(--t-fast);
}
.hero__role:hover { color: var(--primary); border-color: var(--primary); }
.hero__role-sep { color: var(--border); }

.hero__title {
  font-family: var(--font-disp);
  font-size: clamp(2.2rem, 4.5vw, 3.5rem);
  font-weight: 500;
  line-height: 1.13;
  color: var(--text);
  letter-spacing: -.025em;
  margin-bottom: 1.4rem;
}
.hero__italic { font-style: italic; color: var(--primary); font-weight: 400; }

.hero__subtitle {
  font-size: 1.0625rem;
  color: var(--muted);
  line-height: 1.75;
  max-width: 54ch;
  margin-bottom: 2.25rem;
}
.hero__subtitle strong { color: var(--text-2); font-weight: 600; }

.hero__cta    { display: flex; flex-wrap: wrap; gap: .75rem; margin-bottom: 2rem; }
.hero__socials { display: flex; flex-wrap: wrap; gap: .5rem; }

/* Right visual */
.hero__visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero__img-wrap {
  position: relative;
  width: min(360px, 92%);
  aspect-ratio: 4 / 5;
}
.hero__img-frame {
  width: 100%;
  height: 100%;
  border-radius: var(--r-xl);
  overflow: hidden;
  border: 2px solid var(--border);
  box-shadow: var(--sh-xl);
  transition: transform .5s cubic-bezier(.4,0,.2,1), box-shadow .5s cubic-bezier(.4,0,.2,1);
}
.hero__img-frame:hover {
  transform: translateY(-10px) scale(1.015);
  box-shadow: 0 36px 80px rgba(0,0,0,.15), 0 8px 24px rgba(0,0,0,.08);
}
.hero__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
  transition: transform .5s ease;
}
.hero__img-frame:hover .hero__img { transform: scale(1.04); }

.hero__img-glow {
  position: absolute;
  inset: -24px;
  background: radial-gradient(ellipse at 60% 40%, var(--primary-sub), transparent 70%);
  border-radius: calc(var(--r-xl) + 24px);
  z-index: -1;
}

/* Floating stat cards */
.hero__float {
  position: absolute;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: .9rem 1.15rem;
  box-shadow: var(--sh-lg);
  min-width: 130px;
  animation: floatBob 4s ease-in-out infinite;
}
.hero__float--tl { top: 8%; left: -12%; animation-delay: 0s; }
.hero__float--br { bottom: 10%; right: -10%; animation-delay: 2s; }

.hero__float-num {
  font-family: var(--font-disp);
  font-size: 1.85rem;
  font-weight: 600;
  color: var(--primary);
  line-height: 1;
  display: inline;
}
.hero__float-plus { font-size: 1.3rem; color: var(--primary); font-weight: 600; display: inline; line-height: 1; }
.hero__float-lbl  { font-size: .72rem; color: var(--muted); font-weight: 500; margin-top: .3rem; }

@keyframes floatBob {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-8px); }
}

.hero__scroll-hint {
  position: absolute;
  bottom: 2rem;
  left: var(--pad);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .5rem;
  font-size: .68rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--muted);
}
.hero__scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, transparent, var(--border));
}

/* ============================================================
   SCROLL REVEAL
   ============================================================ */
[data-reveal] {
  opacity: 0;
  transition: opacity .65s cubic-bezier(.4,0,.2,1), transform .65s cubic-bezier(.4,0,.2,1);
}
[data-reveal="fade-up"]   { transform: translateY(30px); }
[data-reveal="fade-left"] { transform: translateX(30px); }
[data-reveal].revealed    { opacity: 1; transform: none; }

/* ============================================================
   FEATURED PROJECT
   ============================================================ */
.featured { background: var(--bg); }

.feat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-xl);
  padding: 2.75rem;
  box-shadow: var(--sh-lg);
  transition: box-shadow var(--t-base), border-color var(--t-base);
}
.feat-card:hover { box-shadow: var(--sh-xl); border-color: var(--border-hov); }

.feat-card__top {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 2.25rem;
  flex-wrap: wrap;
}
.feat-card__badge {
  font-family: var(--font-mono);
  font-size: .73rem;
  font-weight: 500;
  color: var(--primary);
  background: var(--primary-sub);
  border: 1px solid rgba(67,56,202,.2);
  padding: .3rem .8rem;
  border-radius: var(--r-full);
  letter-spacing: .04em;
}
.feat-card__status {
  display: flex;
  align-items: center;
  gap: .45rem;
  font-size: .8rem;
  color: var(--muted);
  font-weight: 500;
}
.status-dot {
  width: 7px; height: 7px;
  background: #22C55E;
  border-radius: 50%;
  box-shadow: 0 0 0 3px rgba(34,197,94,.2);
  animation: statusPulse 2s ease-in-out infinite;
}
@keyframes statusPulse { 0%, 100% { box-shadow: 0 0 0 3px rgba(34,197,94,.2); } 50% { box-shadow: 0 0 0 6px rgba(34,197,94,.08); } }

.feat-card__body {
  display: grid;
  grid-template-columns: 1fr 260px;
  gap: 3rem;
  align-items: start;
}

.feat-card__name {
  display: flex;
  align-items: baseline;
  gap: .8rem;
  margin-bottom: .4rem;
}
.feat-card__mono {
  font-family: var(--font-mono);
  font-size: 2.1rem;
  font-weight: 600;
  color: var(--text);
  letter-spacing: -.02em;
}
.feat-card__arabic {
  font-family: var(--font-disp);
  font-size: 1.5rem;
  font-style: italic;
  color: var(--muted);
  font-weight: 300;
}
.feat-card__tagline {
  font-size: .875rem;
  color: var(--primary);
  font-weight: 600;
  letter-spacing: .02em;
  margin-bottom: 1rem;
}
.feat-card__desc {
  font-size: .9375rem;
  color: var(--text-2);
  line-height: 1.78;
  margin-bottom: 2rem;
  max-width: 62ch;
}

.feat-metrics {
  display: flex;
  gap: 2rem;
  margin-bottom: 1.75rem;
  flex-wrap: wrap;
}
.feat-metric { text-align: center; }
.feat-metric__val {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--primary);
  line-height: 1;
  margin-bottom: .25rem;
}
.feat-metric__lbl {
  font-size: .7rem;
  color: var(--muted);
  font-weight: 500;
  letter-spacing: .05em;
  text-transform: uppercase;
  white-space: nowrap;
}

.feat-modules { display: flex; flex-wrap: wrap; gap: .5rem; margin-bottom: 1.5rem; }
.module-tag {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  font-size: .775rem;
  font-weight: 500;
  color: var(--text-2);
  background: var(--surface-alt);
  border: 1px solid var(--border);
  padding: .3rem .75rem;
  border-radius: var(--r-full);
  transition: all var(--t-fast);
}
.module-tag:hover { border-color: var(--primary); color: var(--primary); background: var(--primary-sub); }

.feat-stack { display: flex; flex-wrap: wrap; gap: .4rem; margin-bottom: 2rem; }
.tech-pill {
  font-family: var(--font-mono);
  font-size: .72rem;
  font-weight: 500;
  color: var(--muted);
  background: var(--surface-alt);
  border: 1px solid var(--border);
  padding: .25rem .65rem;
  border-radius: var(--r-full);
  transition: all var(--t-fast);
}
.tech-pill:hover { color: var(--primary); border-color: var(--primary); background: var(--primary-sub); }
.tech-pill--hi   { color: var(--primary); background: var(--primary-sub); border-color: rgba(67,56,202,.22); }

.feat-actions { display: flex; flex-wrap: wrap; gap: .75rem; }

/* Architecture diagram */
.feat-card__arch { }
.arch-label {
  font-size: .68rem;
  font-weight: 600;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 1rem;
  text-align: center;
}
.arch {
  display: flex;
  flex-direction: column;
  align-items: center;
}
.arch__layer { display: flex; gap: .4rem; justify-content: center; }
.arch__node {
  font-family: var(--font-mono);
  font-size: .68rem;
  font-weight: 500;
  color: var(--text-2);
  background: var(--surface-alt);
  border: 1px solid var(--border);
  padding: .4rem .7rem;
  border-radius: var(--r-sm);
  white-space: nowrap;
  transition: all var(--t-fast);
  text-align: center;
}
.arch__node--app { background: var(--primary-sub); color: var(--primary); border-color: rgba(67,56,202,.25); font-weight: 600; }
.arch__node--ai  { background: rgba(99,102,241,.08); color: var(--primary-lt); border-color: rgba(99,102,241,.22); }
.arch__node--db  { color: var(--muted); }
.arch__arrow {
  width: 1px;
  height: 24px;
  background: var(--border);
  position: relative;
  margin: .05rem 0;
}
.arch__arrow::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: -3px;
  width: 0; height: 0;
  border-left: 3.5px solid transparent;
  border-right: 3.5px solid transparent;
  border-top: 5px solid var(--border);
}

/* ============================================================
   PROJECT CARDS
   ============================================================ */
.projects { background: var(--surface-alt); }

.proj-more-head {
  margin: 5rem 0 2.25rem;
  padding-top: 4rem;
  border-top: 1px solid var(--border);
}
.proj-more-lbl {
  font-family: var(--font-mono);
  font-size: .74rem;
  font-weight: 600;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--muted);
}

.proj-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.proj-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  gap: .85rem;
  transition: transform var(--t-base), box-shadow var(--t-base), border-color var(--t-base);
  position: relative;
  overflow: hidden;
}
.proj-card::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 3px;
  background: var(--primary);
  transform: scaleY(0);
  transform-origin: bottom;
  border-radius: 0 0 0 0;
  transition: transform var(--t-base);
}
.proj-card:hover { transform: translateY(-5px); box-shadow: var(--sh-lg); border-color: var(--border-hov); }
.proj-card:hover::before { transform: scaleY(1); }

.proj-card__top { display: flex; justify-content: space-between; align-items: flex-start; }
.proj-card__icon {
  width: 44px; height: 44px;
  background: var(--surface-alt);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  transition: background var(--t-fast), border-color var(--t-fast);
}
.proj-card:hover .proj-card__icon { background: var(--primary-sub); border-color: rgba(67,56,202,.2); }
.proj-card__gh { color: var(--muted); transition: color var(--t-fast), transform var(--t-fast); }
.proj-card__gh:hover { color: var(--text); transform: scale(1.1); }

.proj-card__title {
  font-family: var(--font-disp);
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--text);
  line-height: 1.3;
}
.proj-card__desc { font-size: .875rem; color: var(--muted); line-height: 1.65; flex: 1; }
.proj-card__tags { display: flex; flex-wrap: wrap; gap: .35rem; }
.tech-tag {
  font-family: var(--font-mono);
  font-size: .7rem;
  color: var(--muted);
  background: var(--surface-alt);
  border: 1px solid var(--border);
  padding: .2rem .55rem;
  border-radius: var(--r-full);
}

/* ============================================================
   SKILLS
   ============================================================ */
.skills { background: var(--bg); }

.skills-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }

.skill-group {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 1.5rem 1.6rem;
  transition: box-shadow var(--t-base), border-color var(--t-base), transform var(--t-base);
}
.skill-group:hover { box-shadow: var(--sh-md); border-color: var(--border-hov); transform: translateY(-3px); }

.skill-group__title {
  display: flex;
  align-items: center;
  gap: .5rem;
  font-size: .775rem;
  font-weight: 700;
  color: var(--text-2);
  text-transform: uppercase;
  letter-spacing: .07em;
  margin-bottom: 1rem;
}
.skill-group__title svg { color: var(--primary); flex-shrink: 0; }

.skill-pills { display: flex; flex-wrap: wrap; gap: .4rem; }
.skill-pill {
  font-size: .8125rem;
  font-weight: 500;
  color: var(--text-2);
  background: var(--surface-alt);
  border: 1px solid var(--border);
  padding: .3rem .75rem;
  border-radius: var(--r-full);
  transition: all var(--t-fast);
}
.skill-pill:hover         { color: var(--primary); border-color: var(--primary); background: var(--primary-sub); }
.skill-pill--accent       { color: var(--primary); background: var(--primary-sub); border-color: rgba(67,56,202,.2); }
.skill-pill--accent:hover { background: var(--primary); color: #fff; border-color: var(--primary); }

/* ============================================================
   ABOUT
   ============================================================ */
.about { background: var(--surface-alt); }

.about__grid { display: grid; grid-template-columns: 1fr 380px; gap: 5rem; align-items: start; }

.about__bio { display: flex; flex-direction: column; gap: 1.1rem; margin-bottom: 2.5rem; }
.about__bio p { font-size: .9375rem; color: var(--text-2); line-height: 1.82; }

.about__stats { display: flex; gap: 2.75rem; flex-wrap: wrap; }
.about__stat { display: flex; flex-direction: column; }

.about__stat-num {
  font-family: var(--font-disp);
  font-size: 2.6rem;
  font-weight: 600;
  color: var(--primary);
  line-height: 1;
  display: inline;
}
.about__stat > span:nth-child(2) {
  font-family: var(--font-disp);
  font-size: 2rem;
  font-weight: 600;
  color: var(--primary);
  line-height: 1;
}
.about__stat-lbl {
  display: block;
  font-size: .72rem;
  color: var(--muted);
  font-weight: 600;
  letter-spacing: .06em;
  text-transform: uppercase;
  margin-top: .4rem;
}

.about__card { position: sticky; top: calc(var(--nav-h) + 2rem); }
.about__card-inner {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-xl);
  padding: 2rem;
  box-shadow: var(--sh-lg);
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}
.about__card-head { display: flex; align-items: center; gap: 1rem; }
.about__avatar {
  width: 52px; height: 52px;
  border-radius: var(--r-md);
  background: var(--primary);
  color: #fff;
  font-family: var(--font-disp);
  font-size: 1.1rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  letter-spacing: -.02em;
}
.about__name     { font-size: 1rem; font-weight: 600; color: var(--text); }
.about__role-lbl { font-size: .8rem; color: var(--muted); margin-top: .1rem; }

.about__meta { display: flex; flex-direction: column; gap: .65rem; }
.about__meta-item {
  display: flex;
  align-items: center;
  gap: .65rem;
  font-size: .875rem;
  color: var(--text-2);
}
.about__meta-item svg { color: var(--muted); flex-shrink: 0; }

/* ============================================================
   EDUCATION TIMELINE
   ============================================================ */
.education { background: var(--bg); }

.timeline { display: flex; flex-direction: column; max-width: 780px; }

.timeline__item { display: grid; grid-template-columns: 36px 1fr; gap: 1.5rem; }

.timeline__marker {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding-top: .2rem;
}
.timeline__dot {
  width: 14px; height: 14px;
  border-radius: 50%;
  background: var(--border);
  border: 3px solid var(--bg);
  box-shadow: 0 0 0 2px var(--border);
  flex-shrink: 0;
  transition: background var(--t-base), box-shadow var(--t-base);
}
.timeline__dot--accent     { background: var(--primary); box-shadow: 0 0 0 2px var(--primary-sub), 0 0 0 4px rgba(67,56,202,.1); }
.timeline__item:hover .timeline__dot { background: var(--primary); box-shadow: 0 0 0 2px var(--primary-sub); }
.timeline__line { width: 1px; flex: 1; background: var(--border); margin: .4rem 0; min-height: 32px; }

.timeline__body { padding-bottom: 3rem; }
.timeline__header { display: flex; justify-content: space-between; align-items: flex-start; gap: 1rem; margin-bottom: .85rem; flex-wrap: wrap; }
.timeline__title { font-family: var(--font-disp); font-size: 1.2rem; font-weight: 500; color: var(--text); }
.timeline__inst  { font-size: .875rem; color: var(--primary); font-weight: 500; margin-top: .25rem; }
.timeline__date  {
  font-family: var(--font-mono);
  font-size: .73rem;
  color: var(--muted);
  font-weight: 500;
  background: var(--surface);
  border: 1px solid var(--border);
  padding: .25rem .75rem;
  border-radius: var(--r-full);
  white-space: nowrap;
}
.timeline__desc  { font-size: .9rem; color: var(--text-2); line-height: 1.78; margin-bottom: 1rem; }
.timeline__tags  { display: flex; flex-wrap: wrap; gap: .4rem; }
.tl-tag {
  font-size: .73rem;
  font-weight: 500;
  color: var(--muted);
  background: var(--surface);
  border: 1px solid var(--border);
  padding: .2rem .6rem;
  border-radius: var(--r-full);
}
.tl-tag--accent { color: var(--primary); background: var(--primary-sub); border-color: rgba(67,56,202,.2); }

/* ============================================================
   CONTACT
   ============================================================ */
.contact { background: var(--surface-alt); }

.contact__inner { display: grid; grid-template-columns: 1fr 1fr; gap: 5rem; align-items: start; }

.contact__desc { font-size: .9375rem; color: var(--muted); line-height: 1.78; max-width: 44ch; margin-top: 1rem; }

.contact__links { display: flex; flex-direction: column; gap: .75rem; }

.contact-link {
  display: flex;
  align-items: center;
  gap: 1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 1.1rem 1.25rem;
  transition: all var(--t-base);
  cursor: pointer;
}
.contact-link:hover { border-color: var(--primary); box-shadow: var(--sh-md); transform: translateX(4px); }
.contact-link__icon {
  width: 42px; height: 42px;
  background: var(--surface-alt);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  flex-shrink: 0;
  transition: background var(--t-fast), border-color var(--t-fast);
}
.contact-link:hover .contact-link__icon { background: var(--primary-sub); border-color: rgba(67,56,202,.2); }
.contact-link__text { flex: 1; min-width: 0; }
.contact-link__lbl {
  display: block;
  font-size: .7rem;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: .1rem;
}
.contact-link__val {
  display: block;
  font-size: .875rem;
  font-weight: 500;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.contact-link__arrow { color: var(--muted); flex-shrink: 0; transition: transform var(--t-fast), color var(--t-fast); }
.contact-link:hover .contact-link__arrow { transform: translateX(4px); color: var(--primary); }

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: 2rem 0;
}
.footer__inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--pad);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  flex-wrap: wrap;
}
.footer__brand  { display: flex; align-items: center; gap: 1rem; }
.footer__logo   { font-family: var(--font-disp); font-size: 1.2rem; font-weight: 600; color: var(--primary); transition: opacity var(--t-fast); }
.footer__logo:hover { opacity: .65; }
.footer__credit { font-size: .8rem; color: var(--muted); }
.footer__copy   { font-size: .8rem; color: var(--muted); text-align: center; }
.footer__socials { display: flex; gap: .75rem; }
.footer__social  { color: var(--muted); transition: color var(--t-fast), transform var(--t-fast); }
.footer__social:hover { color: var(--primary); transform: translateY(-2px); }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1024px) {
  .feat-card__body    { grid-template-columns: 1fr; }
  .feat-card__arch    { display: none; }
  .skills-grid        { grid-template-columns: repeat(2, 1fr); }
  .proj-grid          { grid-template-columns: repeat(2, 1fr); }
  .about__grid        { grid-template-columns: 1fr; }
  .about__card        { position: static; }
  .contact__inner     { grid-template-columns: 1fr; gap: 2.5rem; }
}

@media (max-width: 768px) {
  section             { padding: 4.5rem 0; }
  .nav__links         { display: none; }
  .nav__hamburger     { display: flex; }
  .hero__container    { grid-template-columns: 1fr; text-align: center; gap: 3rem; padding-top: 3rem; }
  .hero__roles        { justify-content: center; }
  .hero__subtitle     { margin: 0 auto 2rem; }
  .hero__cta          { justify-content: center; }
  .hero__socials      { justify-content: center; }
  .hero__visual       { order: -1; }
  .hero__float--tl    { top: 0; left: 0; }
  .hero__float--br    { bottom: 0; right: 0; }
  .proj-grid          { grid-template-columns: 1fr; }
  .skills-grid        { grid-template-columns: 1fr; }
  .timeline__item     { grid-template-columns: 28px 1fr; gap: 1rem; }
  .timeline__header   { flex-direction: column; }
  .footer__inner      { flex-direction: column; text-align: center; }
  .footer__socials    { justify-content: center; }
  .feat-metrics       { gap: 1.25rem; }
}

@media (max-width: 480px) {
  .hero__img-wrap     { width: 88%; }
  .hero__float        { display: none; }
  .hero__title        { font-size: 2rem; }
  .section-heading    { font-size: 1.75rem; }
  .feat-card          { padding: 1.5rem; }
  .about__stats       { gap: 1.5rem; }
}

/* ============================================================
   PAGE TRANSITION
   ============================================================ */
.page-out { animation: pageOutAnim .3s ease forwards; }
@keyframes pageOutAnim { to { opacity: 0; transform: translateY(-8px); } }