/* ================================================================
   Muhammad Farhan — Custom Portfolio CSS
   ================================================================ */

/* ── Reset & base ────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:            #050a14;
  --bg2:           #080f1e;
  --glass:         rgba(255,255,255,0.04);
  --glass-h:       rgba(255,255,255,0.07);
  --border:        rgba(255,255,255,0.07);
  --border-glow:   rgba(0,208,232,0.25);
  --text:          #dde8f5;
  --text-dim:      #5a7a90;
  --text-dimmer:   #2e4a5c;
  --accent:        #00d0e8;
  --accent-dim:    rgba(0,208,232,0.10);
  --blue:          #4fc3f7;
  --green:         #22d3a4;
  --orange:        #ffb74d;
  --purple:        #b48af0;
  --pink:          #f06292;
  --font:          'Inter', system-ui, -apple-system, sans-serif;
  --mono:          'JetBrains Mono', 'Fira Code', monospace;
  --r:             12px;
  --rl:            20px;
  --ease:          cubic-bezier(0.4, 0, 0.2, 1);
  --t:             0.25s;
}

html  { scroll-behavior: smooth; scroll-padding-top: 76px; }
body  { background: var(--bg); color: var(--text); font-family: var(--font); line-height: 1.6; overflow-x: hidden; }

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
strong { color: var(--text); font-weight: 700; }

/* ── Animated background orbs ─────────────────────────────────────── */
.bg-orbs { position: fixed; inset: 0; pointer-events: none; z-index: 0; overflow: hidden; }

.orb {
  position: absolute; border-radius: 50%; filter: blur(90px); will-change: transform;
}
.orb-1 {
  width: 700px; height: 700px; top: -250px; left: -200px; opacity: .28;
  background: radial-gradient(circle, rgba(0,208,232,.40) 0%, transparent 70%);
  animation: orb1 14s ease-in-out infinite;
}
.orb-2 {
  width: 550px; height: 550px; bottom: -150px; right: -150px; opacity: .22;
  background: radial-gradient(circle, rgba(0,80,200,.45) 0%, transparent 70%);
  animation: orb2 18s ease-in-out infinite;
}
.orb-3 {
  width: 450px; height: 450px; top: 45%; left: 50%; transform: translate(-50%,-50%); opacity: .16;
  background: radial-gradient(circle, rgba(110,60,230,.50) 0%, transparent 70%);
  animation: orb3 22s ease-in-out infinite;
}

@keyframes orb1 { 0%,100%{transform:translate(0,0)scale(1)} 40%{transform:translate(40px,-30px)scale(1.06)} 70%{transform:translate(-25px,40px)scale(.95)} }
@keyframes orb2 { 0%,100%{transform:translate(0,0)scale(1)} 35%{transform:translate(-50px,30px)scale(1.08)} 65%{transform:translate(30px,-40px)scale(.94)} }
@keyframes orb3 { 0%,100%{transform:translate(-50%,-50%)scale(1)} 50%{transform:translate(-50%,-50%)scale(1.18)} }

/* Dot grid */
.bg-grid {
  position: fixed; inset: 0; z-index: 0; pointer-events: none;
  background-image: radial-gradient(circle, rgba(0,208,232,.07) 1px, transparent 1px);
  background-size: 30px 30px;
  mask-image: radial-gradient(ellipse 85% 85% at 50% 50%, #000 20%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 85% 85% at 50% 50%, #000 20%, transparent 100%);
}

/* All content above background */
body > *:not(.bg-orbs):not(.bg-grid) { position: relative; z-index: 1; }

/* ── Navbar ───────────────────────────────────────────────────────── */
.pf-nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  display: flex; justify-content: center; padding: 12px 20px;
}

.pf-nav__inner {
  display: flex; align-items: center; gap: 4px;
  background: rgba(5,10,20,.84);
  backdrop-filter: blur(26px) saturate(1.7);
  -webkit-backdrop-filter: blur(26px) saturate(1.7);
  border: 1px solid rgba(0,208,232,.16);
  border-radius: 100px;
  padding: 6px 18px;
  box-shadow: 0 8px 36px rgba(0,0,0,.55), inset 0 1px 0 rgba(255,255,255,.05);
  min-width: min(820px, 92vw);
  transition: box-shadow var(--t) var(--ease);
}
.pf-nav__inner:hover { box-shadow: 0 12px 44px rgba(0,0,0,.65), 0 0 0 1px rgba(0,208,232,.12), inset 0 1px 0 rgba(255,255,255,.05); }

.pf-nav__logo {
  color: var(--accent); font-family: var(--mono); font-weight: 700; font-size: .95rem;
  letter-spacing: .06em; text-decoration: none; padding: 5px 12px;
  border: 1px solid rgba(0,208,232,.30); border-radius: 50px; margin-right: 6px; flex-shrink: 0;
  transition: background var(--t), box-shadow var(--t);
}
.pf-nav__logo:hover { background: rgba(0,208,232,.10); box-shadow: 0 0 14px rgba(0,208,232,.35); text-decoration: none; }

.pf-nav__links { display: flex; list-style: none; gap: 2px; flex: 1; }
.pf-nav__links a {
  display: block; color: #7a9ab4; text-decoration: none;
  font-size: .79rem; font-weight: 500; padding: 6px 12px; border-radius: 50px;
  transition: color var(--t), background var(--t);
}
.pf-nav__links a:hover,
.pf-nav__links a.active { color: var(--accent); background: rgba(0,208,232,.08); }

/* Mobile hamburger */
.pf-nav__burger {
  display: none; flex-direction: column; gap: 4px;
  background: none; border: none; cursor: pointer; padding: 6px; margin-left: auto;
}
.pf-nav__burger span { display: block; width: 20px; height: 2px; background: var(--text); border-radius: 2px; transition: var(--t); }

/* ── Layout helpers ───────────────────────────────────────────────── */
.pf-main { padding-top: 0; }
.container { max-width: 1160px; margin: 0 auto; padding: 0 28px; }

/* ── Section common ───────────────────────────────────────────────── */
.section { padding: 100px 0; }

.section-header { margin-bottom: 52px; }
.section-tag {
  display: inline-block; font-family: var(--mono); font-size: .68rem; font-weight: 600;
  letter-spacing: .15em; text-transform: uppercase; color: var(--accent); margin-bottom: 10px;
}
.section-header h2 {
  font-size: clamp(1.9rem, 4vw, 2.6rem); font-weight: 800; letter-spacing: -.03em; color: var(--text);
}

/* Scroll reveal */
.reveal { opacity: 0; transform: translateY(30px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.reveal.visible { opacity: 1; transform: none; }

/* ── HERO ─────────────────────────────────────────────────────────── */
.hero {
  min-height: 100vh; display: flex; flex-direction: column;
  justify-content: center; padding: 110px 0 70px;
  position: relative; overflow: hidden;
}

.hero__content {
  max-width: 1160px; margin: 0 auto; padding: 0 28px;
  display: grid; grid-template-columns: 1fr 400px; gap: 64px; align-items: center;
  animation: fadeUp .9s .1s both;
}

@keyframes fadeUp { from { opacity: 0; transform: translateY(28px); } to { opacity: 1; transform: none; } }

.hero__tag {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(0,208,232,.08); border: 1px solid rgba(0,208,232,.22);
  color: var(--accent); border-radius: 50px; padding: 6px 16px;
  font-size: .75rem; font-weight: 600; letter-spacing: .06em; text-transform: uppercase;
  margin-bottom: 22px; font-family: var(--mono);
}
.hero__tag::before { content: '⚡'; margin-right: 2px; }

.hero__name {
  font-size: clamp(3rem, 7.5vw, 6rem); font-weight: 900;
  letter-spacing: -.045em; line-height: 1.0; margin-bottom: 22px;
}
.hero__name span:first-child { color: var(--text); }

/* Animated gradient text */
.gradient-text {
  background: linear-gradient(115deg, #e8f8ff 0%, #7de8f5 35%, #00c8e0 65%, #0070b8 100%);
  background-size: 220% auto;
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
  animation: gradMove 5s ease infinite;
}
@keyframes gradMove { 0%,100% { background-position: 0% 50%; } 50% { background-position: 100% 50%; } }

.hero__subtitle {
  font-family: var(--mono); font-size: 1.05rem; color: var(--text-dim);
  min-height: 1.65em; margin-bottom: 38px;
}
.typed-cursor { color: var(--accent); animation: blink .85s step-end infinite; }
@keyframes blink { 0%,100%{opacity:1} 50%{opacity:0} }

.hero__cta { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 50px; }

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 13px 30px; border-radius: 50px; font-weight: 600; font-size: .88rem;
  text-decoration: none; cursor: pointer; border: none;
  transition: transform var(--t) var(--ease), box-shadow var(--t) var(--ease), background var(--t);
}
.btn-primary {
  background: linear-gradient(135deg, #00d0e8 0%, #0088bb 100%);
  color: #050a14; box-shadow: 0 4px 22px rgba(0,208,232,.32);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 32px rgba(0,208,232,.52); text-decoration: none; }
.btn-outline {
  background: transparent; color: var(--text); border: 1px solid var(--border);
}
.btn-outline:hover { border-color: var(--accent); color: var(--accent); background: rgba(0,208,232,.06); transform: translateY(-2px); text-decoration: none; }

.hero__stats { display: flex; align-items: center; gap: 30px; }
.stat { display: flex; flex-direction: column; }
.stat__n { font-size: 1.55rem; font-weight: 800; color: var(--text); letter-spacing: -.03em; }
.stat__l { font-size: .68rem; color: var(--text-dim); text-transform: uppercase; letter-spacing: .10em; font-family: var(--mono); }
.stat__div { width: 1px; height: 36px; background: var(--border); }

/* ── Hero photo ────────────────────────────────────────────────────── */
.hero__photo { display: flex; flex-direction: column; align-items: center; gap: 22px; }

.hero__ring {
  position: relative; width: 300px; height: 300px;
}
/* Spinning conic gradient ring */
.hero__ring::before {
  content: ''; position: absolute; inset: -4px; border-radius: 50%;
  background: conic-gradient(from 0deg, var(--accent), #0055bb, var(--purple), var(--green), var(--accent));
  animation: spin 7s linear infinite;
  border-radius: 50%;
}
/* Outer glow */
.hero__ring::after {
  content: ''; position: absolute; inset: -16px; border-radius: 50%;
  background: radial-gradient(circle, rgba(0,208,232,.14) 0%, transparent 70%);
  animation: pulsate 3s ease-in-out infinite;
}
@keyframes spin    { to { transform: rotate(360deg); } }
@keyframes pulsate { 0%,100%{opacity:.5;transform:scale(1)} 50%{opacity:1;transform:scale(1.08)} }

.hero__frame {
  position: relative; width: 100%; height: 100%; border-radius: 50%; overflow: hidden; z-index: 1;
  border: 3px solid var(--bg);
  background: linear-gradient(135deg, #0d1b2a 0%, #111927 100%);
}
.hero__frame img { width: 100%; height: 100%; object-fit: cover; }

.hero__badges { display: flex; gap: 8px; flex-wrap: wrap; justify-content: center; }
.hero__badge {
  padding: 5px 14px; border-radius: 50px; font-size: .72rem; font-weight: 600;
  font-family: var(--mono); transition: transform var(--t);
}
.hero__badge:hover { transform: translateY(-2px); }
.hb-blue   { background: rgba(79,195,247,.12);  border: 1px solid rgba(79,195,247,.32);  color: #4fc3f7; }
.hb-teal   { background: rgba(0,208,232,.10);   border: 1px solid rgba(0,208,232,.28);   color: #00d0e8; }
.hb-green  { background: rgba(34,211,164,.10);  border: 1px solid rgba(34,211,164,.28);  color: #22d3a4; }

/* Scroll hint */
.hero__scroll {
  position: absolute; bottom: 38px; left: 50%; transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  color: var(--text-dimmer); font-size: .66rem; letter-spacing: .14em; text-transform: uppercase;
  font-family: var(--mono); animation: fadeUp 1s 1.4s both;
}
.scroll-bar { width: 1px; height: 40px; background: linear-gradient(var(--text-dimmer), transparent); animation: scrollAnim 2s ease-in-out infinite; }
@keyframes scrollAnim { 0%,100%{height:40px;opacity:.4} 50%{height:52px;opacity:.9} }

/* ── About ─────────────────────────────────────────────────────────── */
.about-grid { display: grid; grid-template-columns: 1.2fr 1fr; gap: 52px; align-items: start; }
.about-text p { font-size: 1.02rem; line-height: 1.84; color: var(--text); margin-bottom: 16px; }
.about-text p a { color: var(--accent); }

.tag-label {
  display: block; font-family: var(--mono); font-size: .66rem; letter-spacing: .15em;
  text-transform: uppercase; color: var(--text-dim); margin-bottom: 11px; margin-top: 24px;
}
.tag-group { display: flex; flex-wrap: wrap; gap: 6px; }
.tag {
  display: inline-block; padding: 4px 13px; border-radius: 50px;
  font-size: .72rem; font-family: var(--mono);
  transition: transform .15s, box-shadow .15s;
}
.tag:hover { transform: translateY(-1px); box-shadow: 0 4px 12px rgba(0,0,0,.3); }
.t-blue   { border: 1px solid rgba(79,195,247,.40); color: #4fc3f7; background: rgba(79,195,247,.08); }
.t-green  { border: 1px solid rgba(34,211,164,.40); color: #22d3a4; background: rgba(34,211,164,.08); }
.t-orange { border: 1px solid rgba(255,183,77,.40);  color: #ffb74d; background: rgba(255,183,77,.08); }
.t-purple { border: 1px solid rgba(180,138,240,.40); color: #b48af0; background: rgba(180,138,240,.08); }
.t-teal   { border: 1px solid rgba(0,208,232,.40);   color: #00d0e8; background: rgba(0,208,232,.08); }

.about-info { display: flex; flex-direction: column; gap: 12px; }
.info-row {
  display: flex; align-items: center; gap: 14px; padding: 16px 18px;
  background: var(--glass); border: 1px solid var(--border); border-radius: var(--r);
  transition: border-color var(--t), transform var(--t);
}
.info-row:hover { border-color: rgba(0,208,232,.18); transform: translateX(4px); }
.info-row i { color: var(--accent); font-size: 1rem; width: 20px; text-align: center; flex-shrink: 0; }
.info-label { font-family: var(--mono); font-size: .65rem; text-transform: uppercase; letter-spacing: .05em; color: var(--text-dim); }
.info-value { font-size: .88rem; color: var(--text); font-weight: 500; }
.info-value a { color: var(--accent); }

/* ── Experience timeline ───────────────────────────────────────────── */
.timeline { position: relative; padding-left: 32px; }
.timeline::before {
  content: ''; position: absolute; left: 0; top: 10px; bottom: 10px; width: 2px;
  background: linear-gradient(to bottom, var(--accent), rgba(0,208,232,.08));
  border-radius: 2px;
}
.tl-item { position: relative; padding: 0 0 36px 36px; }
.tl-item::before {
  content: ''; position: absolute; left: -37px; top: 8px;
  width: 12px; height: 12px; border-radius: 50%; background: var(--accent);
  box-shadow: 0 0 14px rgba(0,208,232,.7); border: 2px solid var(--bg);
  transition: box-shadow var(--t);
}
.tl-item:hover::before { box-shadow: 0 0 22px rgba(0,208,232,.9); }

.tl-card {
  padding: 26px 28px; border-radius: var(--rl);
  background: var(--glass); border: 1px solid var(--border);
  transition: border-color var(--t), box-shadow var(--t), transform var(--t);
}
.tl-card:hover { border-color: rgba(0,208,232,.20); box-shadow: 0 8px 36px rgba(0,0,0,.35); transform: translateX(4px); }

.tl-year  { font-family: var(--mono); font-size: .70rem; color: var(--accent); font-weight: 600; letter-spacing: .04em; margin-bottom: 7px; }
.tl-role  { font-size: 1.08rem; font-weight: 700; color: var(--text); letter-spacing: -.02em; margin-bottom: 4px; }
.tl-org   { font-size: .84rem; color: var(--text-dim); margin-bottom: 14px; display: flex; align-items: center; gap: 6px; }
.tl-org::before { content: '▸'; color: var(--accent); font-size: .68rem; }
.tl-list  { list-style: none; padding: 0; }
.tl-list li {
  font-size: .88rem; color: #8aabcc; padding: 3px 0 3px 18px;
  position: relative; line-height: 1.65;
}
.tl-list li::before { content: '—'; position: absolute; left: 0; color: rgba(0,208,232,.5); }

/* ── Projects ──────────────────────────────────────────────────────── */
.projects-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(330px, 1fr)); gap: 22px;
}
.proj-card {
  border-radius: var(--rl); overflow: hidden;
  background: var(--glass); border: 1px solid var(--border);
  display: flex; flex-direction: column;
  transition: border-color var(--t), box-shadow var(--t), transform var(--t);
}
.proj-card:hover {
  border-color: rgba(0,208,232,.24); transform: translateY(-6px);
  box-shadow: 0 18px 52px rgba(0,0,0,.5), 0 0 0 1px rgba(0,208,232,.08);
}

.proj-img {
  height: 185px; overflow: hidden; position: relative;
  background: linear-gradient(140deg, #0c1e38 0%, #0f2248 50%, #0a1626 100%);
}
.proj-img img {
  width: 100%; height: 100%; object-fit: cover; opacity: .72;
  transition: opacity var(--t), transform .4s var(--ease);
}
.proj-card:hover .proj-img img { opacity: .9; transform: scale(1.05); }
.proj-img-ph {
  width: 100%; height: 100%; display: flex; align-items: center; justify-content: center;
  font-size: 3.5rem; opacity: .18;
}
.proj-img-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(to bottom, transparent 30%, rgba(5,10,20,.88) 100%);
}

.proj-body { padding: 22px 24px; flex: 1; display: flex; flex-direction: column; }
.proj-cat  { font-family: var(--mono); font-size: .64rem; text-transform: uppercase; letter-spacing: .12em; color: var(--accent); margin-bottom: 8px; }
.proj-title { font-size: 1rem; font-weight: 700; color: var(--text); letter-spacing: -.02em; margin-bottom: 10px; line-height: 1.35; }
.proj-desc  { font-size: .84rem; color: #7a9ab4; line-height: 1.65; flex: 1; margin-bottom: 18px; }
.proj-link {
  display: inline-flex; align-items: center; gap: 6px; align-self: flex-start;
  color: var(--accent); font-size: .78rem; font-weight: 600;
  border: 1px solid rgba(0,208,232,.26); border-radius: 50px; padding: 5px 14px;
  transition: background var(--t), box-shadow var(--t); text-decoration: none;
}
.proj-link:hover { background: rgba(0,208,232,.09); box-shadow: 0 0 14px rgba(0,208,232,.22); text-decoration: none; }

/* ── Skills ────────────────────────────────────────────────────────── */
.skills-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(190px, 1fr)); gap: 16px;
}
.sk-block {
  padding: 22px 22px; border-radius: var(--rl);
  background: var(--glass); border: 1px solid var(--border); border-top-width: 2px;
  transition: transform var(--t), box-shadow var(--t), border-color var(--t);
}
.sk-block:hover { transform: translateY(-3px); box-shadow: 0 10px 32px rgba(0,0,0,.35); }

.sk-title { font-family: var(--mono); font-size: .64rem; font-weight: 700; text-transform: uppercase; letter-spacing: .12em; margin-bottom: 12px; }
.sk-items  { font-size: .82rem; line-height: 2.0; color: var(--text-dim); }

.sk-blue   { border-top-color: #4fc3f7; } .sk-blue   .sk-title { color: #4fc3f7; }
.sk-teal   { border-top-color: #00d0e8; } .sk-teal   .sk-title { color: #00d0e8; }
.sk-green  { border-top-color: #22d3a4; } .sk-green  .sk-title { color: #22d3a4; }
.sk-orange { border-top-color: #ffb74d; } .sk-orange .sk-title { color: #ffb74d; }
.sk-purple { border-top-color: #b48af0; } .sk-purple .sk-title { color: #b48af0; }
.sk-pink   { border-top-color: #f06292; } .sk-pink   .sk-title { color: #f06292; }

/* ── Education ─────────────────────────────────────────────────────── */
.edu-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 20px; }
.edu-card {
  padding: 28px 28px; border-radius: var(--rl);
  background: var(--glass); border: 1px solid var(--border); border-left: 3px solid var(--accent);
  transition: transform var(--t), box-shadow var(--t);
}
.edu-card:hover { transform: translateY(-3px); box-shadow: 0 10px 32px rgba(0,0,0,.32); }
.edu-year   { font-family: var(--mono); font-size: .70rem; color: var(--accent); margin-bottom: 8px; letter-spacing: .04em; }
.edu-degree { font-size: 1.05rem; font-weight: 700; color: var(--text); margin-bottom: 6px; }
.edu-inst   { font-size: .84rem; color: var(--text-dim); line-height: 1.5; }

/* ── Contact ───────────────────────────────────────────────────────── */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 52px; align-items: center; }
.contact-text h3 { font-size: 2rem; font-weight: 800; letter-spacing: -.03em; margin-bottom: 14px; }
.contact-text p  { font-size: .95rem; color: var(--text-dim); line-height: 1.78; margin-bottom: 28px; }

.contact-links { display: flex; flex-wrap: wrap; gap: 12px; }
.c-link {
  display: inline-flex; align-items: center; gap: 10px; padding: 12px 22px; border-radius: 50px;
  background: var(--glass); border: 1px solid var(--border); color: var(--text); font-size: .84rem;
  font-weight: 500; text-decoration: none; transition: all var(--t) var(--ease);
}
.c-link:hover { border-color: var(--accent); color: var(--accent); background: rgba(0,208,232,.06); transform: translateY(-2px); text-decoration: none; }
.c-link i { font-size: .95rem; }

.contact-card {
  padding: 40px 36px; border-radius: var(--rl); text-align: center;
  background: linear-gradient(135deg, rgba(0,208,232,.07) 0%, rgba(0,80,200,.07) 100%);
  border: 1px solid rgba(0,208,232,.16);
}
.contact-card__email { font-family: var(--mono); font-size: .94rem; color: var(--accent); margin-bottom: 10px; word-break: break-all; }
.contact-card__note  { font-size: .82rem; color: var(--text-dim); line-height: 1.7; }

/* ── Footer ────────────────────────────────────────────────────────── */
.pf-footer {
  padding: 30px 0; border-top: 1px solid var(--border);
}
.pf-footer p { text-align: center; font-family: var(--mono); font-size: .76rem; color: var(--text-dimmer); }
.pf-footer a { color: var(--accent); }
.pf-footer a:hover { text-decoration: underline; }

/* ── Utility divider ───────────────────────────────────────────────── */
.section-divider {
  max-width: 1160px; margin: 0 auto; padding: 0 28px;
  border-top: 1px solid var(--border);
}

/* ── Responsive ────────────────────────────────────────────────────── */
@media (max-width: 920px) {
  .hero__content       { grid-template-columns: 1fr; text-align: center; gap: 40px; }
  .hero__photo         { order: -1; }
  .hero__ring          { width: 240px; height: 240px; }
  .hero__cta           { justify-content: center; }
  .hero__stats         { justify-content: center; }
  .about-grid          { grid-template-columns: 1fr; }
  .contact-grid        { grid-template-columns: 1fr; }
  .pf-nav__links       { display: none; }
  .pf-nav__burger      { display: flex; }
  .pf-nav__inner       { min-width: 92vw; justify-content: space-between; }
  .tag-group           { justify-content: flex-start; }
}

@media (max-width: 600px) {
  .hero__name    { font-size: 2.8rem; }
  .projects-grid { grid-template-columns: 1fr; }
  .skills-grid   { grid-template-columns: 1fr 1fr; }
  .section       { padding: 70px 0; }
  .container     { padding: 0 18px; }
}

/* ── Mobile menu overlay ───────────────────────────────────────────── */
.pf-nav__links.open {
  display: flex !important; flex-direction: column; gap: 4px;
  position: absolute; top: 68px; left: 10px; right: 10px;
  background: rgba(5,10,20,.97); backdrop-filter: blur(20px);
  border: 1px solid rgba(0,208,232,.16); border-radius: 16px; padding: 12px;
  box-shadow: 0 16px 48px rgba(0,0,0,.7);
  animation: menuIn .2s var(--ease);
}
@keyframes menuIn { from { opacity:0; transform: translateY(-8px); } to { opacity:1; transform: none; } }
.pf-nav__links.open a { padding: 10px 16px; border-radius: 10px; font-size: .9rem; }

/* ── Blog listing page ─────────────────────────────────────────────── */
.blog-listing-hero {
  padding: 140px 0 50px; text-align: center;
}
.blog-listing-hero .section-tag { margin-bottom: 12px; }
.blog-listing-hero h1 {
  font-size: clamp(2.4rem, 6vw, 4.2rem); font-weight: 900;
  letter-spacing: -.04em; margin: 10px 0 16px; color: var(--text);
}
.blog-listing-sub {
  font-size: .98rem; color: var(--text-dim); max-width: 480px; margin: 0 auto;
}

.blog-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(340px, 1fr)); gap: 22px;
}

.blog-card {
  display: flex; flex-direction: column; gap: 10px;
  padding: 28px 26px; border-radius: var(--rl);
  background: var(--glass); border: 1px solid var(--border);
  text-decoration: none; color: var(--text);
  transition: border-color var(--t), box-shadow var(--t), transform var(--t);
}
.blog-card:hover {
  border-color: rgba(0,208,232,.24); transform: translateY(-4px);
  box-shadow: 0 14px 44px rgba(0,0,0,.45); text-decoration: none; color: var(--text);
}

.blog-card__date {
  font-family: var(--mono); font-size: .68rem; color: var(--accent); letter-spacing: .05em;
}
.blog-card__title {
  font-size: 1.12rem; font-weight: 700; color: var(--text);
  letter-spacing: -.02em; line-height: 1.35;
}
.blog-card__excerpt {
  font-size: .87rem; color: var(--text-dim); line-height: 1.72; flex: 1;
}
.blog-card__tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 4px; }
.blog-tag {
  display: inline-block; padding: 3px 11px; border-radius: 50px;
  font-size: .67rem; font-family: var(--mono);
  background: rgba(0,208,232,.07); border: 1px solid rgba(0,208,232,.22); color: var(--accent);
}
.blog-card__more {
  font-size: .76rem; font-weight: 600; color: var(--accent); font-family: var(--mono); margin-top: 6px;
}

/* ── Blog post page ────────────────────────────────────────────────── */
.post-page { padding: 110px 0 90px; }

.post-wrap { max-width: 760px; margin: 0 auto; padding: 0 28px; }

.post-back {
  display: inline-flex; align-items: center; gap: 6px;
  font-family: var(--mono); font-size: .76rem; color: var(--text-dim);
  text-decoration: none; margin-bottom: 44px;
  transition: color var(--t);
}
.post-back:hover { color: var(--accent); text-decoration: none; }

.post-header { margin-bottom: 44px; }
.post-meta   { margin-bottom: 12px; }
.post-date   { font-family: var(--mono); font-size: .72rem; color: var(--accent); letter-spacing: .05em; }
.post-title  {
  font-size: clamp(1.9rem, 4.5vw, 2.8rem); font-weight: 900;
  letter-spacing: -.04em; line-height: 1.15; margin-bottom: 18px;
}
.post-tags { display: flex; flex-wrap: wrap; gap: 6px; }

/* Post content typography */
.post-content { font-size: 1rem; line-height: 1.85; color: var(--text); }

.post-content h1 {
  font-size: 2rem; font-weight: 800; margin: 2.4rem 0 .9rem; letter-spacing: -.03em;
}
.post-content h2 {
  font-size: 1.45rem; font-weight: 700; margin: 2rem 0 .8rem; letter-spacing: -.02em;
  border-bottom: 1px solid var(--border); padding-bottom: .45rem; color: var(--text);
}
.post-content h3 {
  font-size: 1.12rem; font-weight: 700; margin: 1.6rem 0 .55rem; color: var(--text);
}
.post-content p  { margin-bottom: 1.2rem; }
.post-content ul { padding-left: 1.4rem; margin-bottom: 1.2rem; }
.post-content li { margin-bottom: .45rem; }
.post-content strong { color: #ddf0ff; }
.post-content em     { font-style: italic; color: var(--text-dim); }

.post-content code {
  font-family: var(--mono); font-size: .83em;
  background: rgba(0,208,232,.07); border: 1px solid rgba(0,208,232,.16);
  border-radius: 5px; padding: 2px 7px; color: #7de8f5;
}

.post-content pre {
  background: #060d1a; border: 1px solid rgba(0,208,232,.14);
  border-radius: var(--r); padding: 22px 24px; overflow-x: auto; margin: 1.4rem 0;
}
.post-content pre code {
  background: none; border: none; padding: 0;
  font-size: .83rem; color: #9ecfef; line-height: 1.75;
}

/* Table */
.table-wrap { overflow-x: auto; margin: 1.4rem 0; border-radius: var(--r); }
.post-content table { width: 100%; border-collapse: collapse; font-size: .87rem; }
.post-content th {
  text-align: left; padding: 10px 16px;
  background: rgba(0,208,232,.07); border: 1px solid var(--border);
  font-family: var(--mono); font-size: .72rem; color: var(--accent); letter-spacing: .05em;
}
.post-content td {
  padding: 10px 16px; border: 1px solid var(--border); color: var(--text-dim);
}
.post-content tr:hover td { background: rgba(255,255,255,.02); }

/* Blog post — images & figures */
.post-content img,
.post-content .inline-img {
  max-width: 100%; height: auto; border-radius: var(--r);
  display: block; margin: 1.2rem auto;
}
.post-content figure.blog-figure {
  margin: 2rem 0; text-align: center;
}
.post-content figure.blog-figure img {
  margin: 0 auto 0.6rem;
  border: 1px solid var(--border);
  box-shadow: 0 4px 24px rgba(0,0,0,.4);
}
.post-content figcaption {
  font-size: .78rem; color: var(--text-dim);
  font-family: var(--mono); letter-spacing: .03em;
}

/* Blog post — video embed (responsive 16:9) */
.post-content .video-embed {
  position: relative; padding-bottom: 56.25%; height: 0;
  overflow: hidden; border-radius: var(--r); margin: 2rem 0;
  border: 1px solid var(--border);
}
.post-content .video-embed iframe {
  position: absolute; top: 0; left: 0;
  width: 100%; height: 100%; border: none;
}

/* Blog post — horizontal rule */
.post-content hr {
  border: none; border-top: 1px solid var(--border); margin: 2rem 0;
}

/* Blog post — ordered list */
.post-content ol { padding-left: 1.4rem; margin-bottom: 1.2rem; }
.post-content ol li { margin-bottom: .45rem; }

@media (max-width: 600px) {
  .blog-grid  { grid-template-columns: 1fr; }
  .post-wrap  { padding: 0 18px; }
  .post-title { font-size: 1.75rem; }
}