/* ============================================================
   STYLE.CSS — Samer Abu Zaina Portfolio
   Colors : #02569B · #13B9FD · #F8FAFC · #FFFFFF · #0F172A · #64748B
   Fonts  : Inter (UI) · JetBrains Mono (code/labels)
   ============================================================ */

/* ── Variables ──────────────────────────────────────────── */
:root {
  --primary:        #02569B;
  --primary-10:     rgba(2,86,155,0.10);
  --primary-20:     rgba(2,86,155,0.20);
  --primary-light:  #E8F4FD;

  --accent:         #13B9FD;
  --accent-10:      rgba(19,185,253,0.10);
  --accent-30:      rgba(19,185,253,0.30);

  --bg:             #F8FAFC;
  --bg-alt:         #EEF4FB;
  --surface:        #FFFFFF;

  --text:           #0F172A;
  --text-sec:       #64748B;
  --text-muted:     #94A3B8;

  --border:         #E2E8F0;

  --gradient:       linear-gradient(135deg, #02569B, #13B9FD);

  --sh-sm:  0 1px 3px rgba(15,23,42,0.08), 0 1px 2px rgba(15,23,42,0.04);
  --sh-md:  0 4px 16px rgba(2,86,155,0.10), 0 2px 6px rgba(15,23,42,0.05);
  --sh-lg:  0 12px 40px rgba(2,86,155,0.13), 0 4px 12px rgba(15,23,42,0.06);

  --font:   'Inter', sans-serif;
  --mono:   'JetBrains Mono', monospace;

  --pad:    clamp(5rem, 10vw, 8rem);
  --max-w:  1200px;
  --r:      12px;
  --r-lg:   18px;

  --ease:        cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --fast:        0.18s var(--ease);
  --med:         0.36s var(--ease);
}

/* ── Reset ──────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 76px; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
img    { display: block; max-width: 100%; }
a      { text-decoration: none; color: inherit; }
ul     { list-style: none; }
button { cursor: pointer; font-family: inherit; border: none; }
::selection { background: var(--accent-10); color: var(--primary); }

/* ── Layout ─────────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 clamp(1.25rem, 5vw, 2.5rem);
}
.gradient-text {
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  background-size: 200% auto;
  animation: shimmer 4s linear infinite;
}

/* ── Card ───────────────────────────────────────────────── */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  box-shadow: var(--sh-sm);
  transition: transform var(--med), border-color var(--med), box-shadow var(--med);
}
.card:hover {
  transform: translateY(-5px);
  border-color: var(--accent-30);
  box-shadow: var(--sh-lg);
}

/* ── Buttons ────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-family: var(--font);
  font-weight: 600;
  font-size: 0.9rem;
  padding: 0.72rem 1.5rem;
  border-radius: 50px;
  border: none;
  cursor: pointer;
  white-space: nowrap;
  position: relative;
  overflow: hidden;
  transition: transform var(--fast), box-shadow var(--fast),
              background var(--fast), color var(--fast), border-color var(--fast);
}
.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0.18);
  opacity: 0;
  transition: opacity 0.25s;
}
.btn:active::after { opacity: 1; }
.btn-primary {
  background: var(--gradient);
  color: #fff;
  box-shadow: 0 4px 18px var(--accent-30);
}
.btn-primary:hover { transform: translateY(-2px) scale(1.02); box-shadow: 0 8px 28px rgba(19,185,253,0.42); }
.btn-outline {
  background: transparent;
  color: var(--primary);
  border: 2px solid var(--primary);
}
.btn-outline:hover { background: var(--primary-10); transform: translateY(-2px) scale(1.02); box-shadow: var(--sh-md); }
.btn-ghost {
  background: var(--surface);
  color: var(--text);
  border: 1.5px solid var(--border);
  box-shadow: var(--sh-sm);
}
.btn-ghost:hover { background: var(--primary-light); border-color: var(--accent); color: var(--primary); transform: translateY(-2px) scale(1.02); }
.btn-sm   { padding: 0.46rem 1rem; font-size: 0.82rem; }
.btn-full { width: 100%; justify-content: center; }

/* ── Section ────────────────────────────────────────────── */
.section { padding: var(--pad) 0; }
.section-header { text-align: center; margin-bottom: clamp(2.5rem,5vw,4rem); }

.section-tag {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--primary);
  background: var(--primary-light);
  border: 1px solid var(--primary-20);
  padding: 0.28rem 0.85rem;
  border-radius: 50px;
  margin-bottom: 0.85rem;
  transition: transform var(--fast);
}
.section-tag:hover { transform: scale(1.04); }

.section-title {
  font-size: clamp(1.9rem, 4vw, 2.7rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--text);
}

/* ── Animations ─────────────────────────────────────────── */

/* Hero entrance */
.hero-anim-left  { animation: heroLeft  0.75s var(--ease) 0.10s both; }
.hero-anim-right { animation: heroRight 0.75s var(--ease) 0.22s both; }
@keyframes heroLeft  { from { opacity:0; transform:translateX(-40px); } to { opacity:1; transform:none; } }
@keyframes heroRight { from { opacity:0; transform:translateX( 40px); } to { opacity:1; transform:none; } }

/* Staggered hero children */
.hero-greeting   { animation: fadeUp 0.6s var(--ease) 0.35s both; }
.hero-name       { animation: fadeUp 0.6s var(--ease) 0.48s both; }
.hero-title-wrap { animation: fadeUp 0.6s var(--ease) 0.60s both; }
.hero-desc       { animation: fadeUp 0.6s var(--ease) 0.72s both; }
.hero-ctas       { animation: fadeUp 0.6s var(--ease) 0.84s both; }
.social-links    { animation: fadeUp 0.6s var(--ease) 0.96s both; }
@keyframes fadeUp { from { opacity:0; transform:translateY(22px); } to { opacity:1; transform:none; } }

/* Navbar drop */
.navbar { transform: translateY(-100%); animation: navDrop 0.55s var(--ease) 0.05s forwards; }
@keyframes navDrop { to { transform: translateY(0); } }

/* Scroll reveal */
.reveal { /* visible by default */ }
.reveal.will-reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.60s var(--ease), transform 0.60s var(--ease);
  transition-delay: var(--d, 0s);
}
.reveal.will-reveal.revealed { opacity: 1; transform: none; }

/* Ambient */
@keyframes floatOrb  { 0%,100%{transform:translate(0,0);}  50%{transform:translate(26px,-26px);} }
@keyframes pulseRing {
  0%,100% { box-shadow:0 0 0 8px rgba(19,185,253,0.10),0 20px 60px rgba(2,86,155,0.18); }
  50%     { box-shadow:0 0 0 15px rgba(19,185,253,0.16),0 26px 80px rgba(2,86,155,0.26); }
}
@keyframes blink     { 0%,100%{opacity:1;} 50%{opacity:0.28;} }
@keyframes scrollDown {
  0%   {transform:scaleY(0);transform-origin:top;   opacity:0;}
  50%  {transform:scaleY(1);transform-origin:top;   opacity:1;}
  100% {transform:scaleY(0);transform-origin:bottom;opacity:0;}
}
@keyframes shimmer   { 0%{background-position:0% center;} 50%{background-position:100% center;} 100%{background-position:0% center;} }

/* Micro interactions */
.about-card:hover .card-icon,
.skill-card:hover .skill-icon { animation: iconBounce 0.45s var(--ease-spring) both; }
@keyframes iconBounce { 0%{transform:scale(1);}50%{transform:scale(1.18) rotate(-6deg);}100%{transform:scale(1.08) rotate(0);} }

.social-icon:hover { animation: iconPop 0.3s var(--ease-spring) both; }
@keyframes iconPop { 0%{transform:scale(1) translateY(0);}60%{transform:scale(1.22) translateY(-5px);}100%{transform:scale(1.08) translateY(-3px);} }

.timeline-dot::after {
  content:'';position:absolute;inset:-4px;border-radius:50%;
  border:2px solid var(--accent);opacity:0;
  animation:ping 2.5s ease-out infinite;
}
@keyframes ping { 0%{transform:scale(1);opacity:0.6;} 70%,100%{transform:scale(1.7);opacity:0;} }

.highlight-pill { animation: pillPulse 3s ease-in-out infinite; }
@keyframes pillPulse { 0%,100%{box-shadow:0 0 0 0 rgba(5,150,105,0);} 50%{box-shadow:0 0 0 4px rgba(5,150,105,0.12);} }

/* Footer arrow links */
.footer-links a { position:relative; padding-left:0; transition:color var(--fast),padding-left var(--fast); }
.footer-links a::before { content:'→';position:absolute;left:-16px;opacity:0;transition:opacity var(--fast),left var(--fast);color:var(--accent); }
.footer-links a:hover { padding-left:18px; }
.footer-links a:hover::before { left:0;opacity:1; }

/* Nav underline */
.nav-link::after {
  content:'';position:absolute;bottom:2px;left:50%;
  transform:translateX(-50%) scaleX(0);
  width:16px;height:2px;background:var(--accent);border-radius:2px;
  transition:transform 0.25s var(--ease-spring);
}
.nav-link:hover::after,.nav-link.active::after { transform:translateX(-50%) scaleX(1); }

/* Spin */
.spin { display:inline-block; animation:spinA 0.8s linear infinite; }
@keyframes spinA { to{transform:rotate(360deg);} }

/* ============================================================
   NAVBAR
============================================================ */
.navbar {
  position: fixed;
  top:0; left:0; right:0;
  z-index: 1000;
  transition: background var(--med), box-shadow var(--med);
}
.navbar.scrolled {
  background: rgba(248,250,252,0.93);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 1px 0 var(--border), var(--sh-sm);
}
.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 1.1rem clamp(1.25rem,5vw,2.5rem);
  transition: padding var(--med);
}
.navbar.scrolled .nav-container { padding-top:0.72rem; padding-bottom:0.72rem; }

.nav-logo {
  font-family: var(--mono);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text);
  transition: color var(--fast), transform var(--fast);
  display: flex;
  align-items: center;
  gap: 0.35rem;
}
.nav-logo:hover { color:var(--primary); transform:scale(1.04); }
.logo-bracket { color:var(--text-muted); }
.logo-accent  { color:var(--accent); }

/* Logo dragon icon */
.nav-logo-icon {
  width: 22px; height: 22px;
  object-fit: contain;
  border-radius: 4px;
}

.nav-links { display:flex; align-items:center; gap:0.2rem; }
.nav-link {
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-sec);
  padding: 0.45rem 0.8rem;
  border-radius: 8px;
  position: relative;
  transition: color var(--fast), background var(--fast);
}
.nav-link:hover, .nav-link.active { color:var(--primary); }

/* Hamburger */
.hamburger { display:none; flex-direction:column; gap:5px; background:none; border:none; padding:4px; }
.bar { display:block; width:24px; height:2px; background:var(--text); border-radius:2px; transition:transform 0.3s var(--ease), opacity 0.3s; transform-origin:center; }
.hamburger.open .bar:nth-child(1) { transform:translateY(7px) rotate(45deg); }
.hamburger.open .bar:nth-child(2) { opacity:0; }
.hamburger.open .bar:nth-child(3) { transform:translateY(-7px) rotate(-45deg); }

.mobile-menu { max-height:0; overflow:hidden; transition:max-height 0.4s var(--ease); background:rgba(248,250,252,0.98); backdrop-filter:blur(20px); border-top:1px solid var(--border); box-shadow:var(--sh-md); }
.mobile-menu.open { max-height:440px; }
.mobile-links { display:flex; flex-direction:column; padding:0.75rem clamp(1.25rem,5vw,2.5rem) 1.5rem; gap:0.2rem; }
.mobile-link { font-size:1rem; font-weight:500; color:var(--text-sec); padding:0.7rem 0.5rem; border-bottom:1px solid var(--border); transition:color var(--fast),padding-left var(--fast); }
.mobile-link:hover { color:var(--primary); padding-left:0.75rem; }
.mobile-cv { margin-top:0.75rem; align-self:flex-start; }

/* ============================================================
   HERO
============================================================ */
.hero {
  min-height: 100svh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding-top: 80px;
  background: linear-gradient(160deg, #F8FAFC 0%, #EEF4FB 55%, #E4F2FD 100%);
}
.hero-bg-grid {
  position:absolute; inset:0;
  background-image:radial-gradient(rgba(2,86,155,0.07) 1px,transparent 1px);
  background-size:30px 30px;
  mask-image:radial-gradient(ellipse 80% 80% at 50% 50%,black,transparent);
  pointer-events:none;
}
.orb { position:absolute; border-radius:50%; pointer-events:none; filter:blur(72px); }
.orb-1 { width:480px;height:480px; background:radial-gradient(circle,rgba(19,185,253,0.13),transparent 70%); top:-120px;right:-80px; animation:floatOrb 12s ease-in-out infinite; }
.orb-2 { width:360px;height:360px; background:radial-gradient(circle,rgba(2,86,155,0.08),transparent 70%); bottom:-100px;left:-60px; animation:floatOrb 16s ease-in-out infinite reverse; }

.hero-container { display:flex; align-items:center; gap:clamp(3rem,6vw,6rem); position:relative; z-index:1; width:100%; }

/* Hero text */
.hero-text { flex:1; min-width:0; }
.hero-greeting {
  font-family: var(--mono);
  font-size: 0.85rem; font-weight:500; letter-spacing:0.10em; text-transform:uppercase;
  color: var(--accent); margin-bottom:0.75rem;
  display:flex; align-items:center; gap:0.6rem;
}
.hero-greeting::before { content:''; width:26px; height:2px; background:var(--accent); border-radius:2px; flex-shrink:0; }
.hero-name { font-size:clamp(2.5rem,5.5vw,4rem); font-weight:800; line-height:1.1; letter-spacing:-0.03em; color:var(--text); margin-bottom:1.2rem; }

.hero-title-wrap { display:flex; flex-wrap:wrap; align-items:center; gap:0.5rem; margin-bottom:1.4rem; }
.title-pill { font-family:var(--mono); font-size:0.78rem; font-weight:500; background:var(--surface); border:1px solid var(--border); padding:0.32rem 0.8rem; border-radius:50px; color:var(--text-sec); box-shadow:var(--sh-sm); transition:transform var(--fast),box-shadow var(--fast),border-color var(--fast); }
.title-pill:hover { transform:scale(1.04); box-shadow:var(--sh-md); border-color:var(--accent-30); }
.title-pill.accent { background:var(--primary-light); border-color:var(--primary-20); color:var(--primary); }
.title-sep { color:var(--text-muted); font-size:0.88rem; }

.hero-desc { font-size:1.02rem; color:var(--text-sec); max-width:500px; margin-bottom:2rem; line-height:1.8; }
.hero-desc strong { color:var(--text); font-weight:600; }

.hero-ctas { display:flex; flex-wrap:wrap; gap:0.9rem; margin-bottom:2.2rem; }

/* ── Social icons ── */
.social-links { display:flex; flex-wrap:wrap; gap:0.6rem; }

.social-icon {
  width:42px; height:42px;
  display:flex; align-items:center; justify-content:center;
  border:1.5px solid var(--border);
  border-radius:10px;
  color:var(--text-sec);
  font-size:1.18rem;
  background:var(--surface);
  box-shadow:var(--sh-sm);
  transition:color var(--fast),border-color var(--fast),background var(--fast),box-shadow var(--fast);
  overflow: hidden; /* for image icons */
}
.social-icon:hover {
  color:var(--primary);
  border-color:var(--accent);
  background:var(--primary-light);
  box-shadow:var(--sh-md);
}

/* Custom image icons (LeetCode, HackMD) */
.social-icon-img {
  padding: 6px; /* tighter padding so image has space */
}
.social-custom-icon {
  width:100%; height:100%;
  object-fit: contain;
  border-radius: 4px;
  display: block;
}

/* Hero image */
.hero-image-wrap { flex-shrink:0; display:flex; flex-direction:column; align-items:center; }
.hero-image-ring {
  width:clamp(250px,28vw,340px); height:clamp(250px,28vw,340px);
  border-radius:50%; padding:4px;
  background:var(--gradient);
  box-shadow:0 0 0 8px rgba(19,185,253,0.10),0 20px 60px rgba(2,86,155,0.18);
  animation:pulseRing 5s ease-in-out infinite;
}
.hero-image-inner {
  width:100%;height:100%;border-radius:50%;
  background:linear-gradient(145deg,#E8F4FD,#F8FAFC);
  display:flex;align-items:center;justify-content:center;
  overflow:hidden;border:3px solid var(--bg);
}
.profile-photo { width:100%;height:100%;object-fit:cover;object-position:center top;border-radius:50%;transition:transform 0.5s var(--ease); }
.hero-image-ring:hover .profile-photo { transform:scale(1.05); }
.avatar-fallback { font-family:var(--font);font-size:clamp(3rem,7vw,5rem);font-weight:800;background:var(--gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;align-items:center;justify-content:center; }

.status-badge { margin-top:1.2rem;display:flex;align-items:center;gap:0.5rem;font-family:var(--mono);font-size:0.76rem;font-weight:500;color:#059669;background:#ECFDF5;border:1px solid #A7F3D0;padding:0.38rem 1rem;border-radius:50px;transition:transform var(--fast),box-shadow var(--fast); }
.status-badge:hover { transform:scale(1.04);box-shadow:0 4px 12px rgba(5,150,105,0.15); }
.status-dot { width:8px;height:8px;border-radius:50%;background:#10B981;box-shadow:0 0 6px rgba(16,185,129,0.5);animation:blink 2.2s ease-in-out infinite;flex-shrink:0; }

.scroll-cue { position:absolute;bottom:2.5rem;left:50%;transform:translateX(-50%);display:flex;flex-direction:column;align-items:center;gap:0.5rem;color:var(--text-muted);font-family:var(--mono);font-size:0.68rem;letter-spacing:0.12em;text-transform:uppercase; }
.scroll-line { width:1px;height:38px;background:linear-gradient(to bottom,var(--accent),transparent);animation:scrollDown 2s ease-in-out infinite; }

/* ============================================================
   ABOUT
============================================================ */
.about { background:var(--bg); }
.about-grid { display:grid; grid-template-columns:repeat(auto-fit,minmax(255px,1fr)); gap:1.4rem; }
.about-card { padding:1.9rem 1.7rem; }
.card-icon { width:50px;height:50px;border-radius:13px;background:var(--primary-light);border:1px solid var(--primary-20);display:flex;align-items:center;justify-content:center;font-size:1.35rem;color:var(--primary);margin-bottom:1rem;transition:transform var(--fast),box-shadow var(--fast),background var(--fast),color var(--fast); }
.about-card:hover .card-icon { background:var(--primary);color:#fff;box-shadow:0 6px 20px var(--primary-20); }
.about-card h3 { font-size:1rem;font-weight:700;color:var(--text);margin-bottom:0.6rem;transition:color var(--fast); }
.about-card:hover h3 { color:var(--primary); }
.about-card p { font-size:0.88rem;color:var(--text-sec);line-height:1.75; }

/* ============================================================
   SKILLS
============================================================ */
.experience { background:var(--bg-alt); }
.skills-layout { display:grid; grid-template-columns:repeat(auto-fit,minmax(290px,1fr)); gap:1.4rem; }
.skill-card { padding:1.7rem; }
.skill-card-header { display:flex;align-items:center;gap:0.9rem;margin-bottom:1.4rem; }
.skill-card-header h3 { font-size:0.97rem;font-weight:700;color:var(--text); }
.skill-icon { width:44px;height:44px;border-radius:11px;display:flex;align-items:center;justify-content:center;font-size:1.25rem;flex-shrink:0;transition:transform var(--fast),box-shadow var(--fast); }
.skill-icon.cyan   { background:var(--accent-10);    color:var(--accent);  border:1px solid rgba(19,185,253,0.25); }
.skill-icon.violet { background:var(--primary-light); color:var(--primary); border:1px solid var(--primary-20);    }
.skill-icon.teal   { background:#ECFDF5;              color:#059669;        border:1px solid #A7F3D0;              }
.skill-icon.orange { background:#FFF7ED;              color:#EA580C;        border:1px solid #FED7AA;              }

.skill-list { display:flex;flex-direction:column;gap:0.9rem; }
.skill-list li { display:flex;align-items:center;gap:0.75rem; }
.skill-name { font-family:var(--mono);font-size:0.76rem;color:var(--text-sec);width:118px;flex-shrink:0; }
.skill-bar { flex:1;height:6px;background:var(--border);border-radius:50px;overflow:hidden; }
.skill-fill { height:100%;width:0;background:var(--gradient);border-radius:50px;transition:width 1.1s cubic-bezier(0.22,1,0.36,1); }
.skill-pct { font-family:var(--mono);font-size:0.7rem;color:var(--text-muted);width:32px;text-align:right;flex-shrink:0; }

/* Timeline */
.timeline { position:relative;display:flex;flex-direction:column; }
.timeline::before { content:'';position:absolute;left:7px;top:8px;bottom:8px;width:1px;background:linear-gradient(to bottom,var(--accent),var(--primary),transparent); }
.timeline-item { display:flex;gap:1.1rem;padding-bottom:1.4rem; }
.timeline-item:last-child { padding-bottom:0; }
.timeline-dot { width:15px;height:15px;border-radius:50%;background:var(--surface);border:2px solid var(--accent);flex-shrink:0;margin-top:4px;box-shadow:0 0 0 4px rgba(19,185,253,0.14);position:relative;z-index:1;transition:background var(--fast),transform var(--fast); }
.timeline-item:hover .timeline-dot { background:var(--accent);transform:scale(1.2); }
.timeline-date { font-family:var(--mono);font-size:0.7rem;font-weight:500;color:var(--accent);letter-spacing:0.05em; }
.timeline-content h4 { font-size:0.9rem;font-weight:700;color:var(--text);margin:0.2rem 0 0.25rem;transition:color var(--fast); }
.timeline-item:hover .timeline-content h4 { color:var(--primary); }
.timeline-content p { font-size:0.81rem;color:var(--text-sec);line-height:1.65; }

/* ============================================================
   PROJECTS
============================================================ */
.projects { background:var(--bg); }
.projects-grid { display:grid;grid-template-columns:repeat(auto-fill,minmax(290px,1fr));gap:1.4rem;margin-bottom:2.8rem; }
.project-card { padding:1.7rem;display:flex;flex-direction:column;gap:0.9rem; }
.project-header { display:flex;align-items:flex-start;justify-content:space-between;gap:0.75rem; }
.project-icon { width:48px;height:48px;border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:1.4rem;flex-shrink:0;transition:transform 0.4s var(--ease-spring),box-shadow var(--fast); }
.project-card:hover .project-icon { transform:rotate(-8deg) scale(1.12);box-shadow:0 6px 18px rgba(2,86,155,0.18); }
.project-icon.blue   { background:var(--primary-light);border:1px solid var(--primary-20);          color:var(--primary); }
.project-icon.sky    { background:var(--accent-10);     border:1px solid rgba(19,185,253,0.25);       color:var(--accent);  }
.project-icon.green  { background:#ECFDF5;              border:1px solid #A7F3D0;                     color:#059669;        }
.project-icon.orange { background:#FFF7ED;              border:1px solid #FED7AA;                     color:#EA580C;        }
.project-tags { display:flex;flex-wrap:wrap;gap:0.3rem;justify-content:flex-end; }
.tag { font-family:var(--mono);font-size:0.68rem;font-weight:500;color:var(--primary);background:var(--primary-light);border:1px solid var(--primary-20);padding:0.18rem 0.55rem;border-radius:50px;transition:background var(--fast),color var(--fast),transform var(--fast); }
.tag:hover { background:var(--primary);color:#fff;transform:scale(1.06); }
.project-title { font-size:1.08rem;font-weight:700;color:var(--text);transition:color var(--fast); }
.project-card:hover .project-title { color:var(--primary); }
.project-desc { font-size:0.87rem;color:var(--text-sec);line-height:1.75;flex:1; }
.project-highlights { display:flex;flex-wrap:wrap;gap:0.45rem; }
.highlight-pill { display:inline-flex;align-items:center;gap:0.3rem;font-family:var(--mono);font-size:0.7rem;font-weight:500;color:#059669;background:#ECFDF5;border:1px solid #A7F3D0;padding:0.22rem 0.65rem;border-radius:50px; }
.project-links { display:flex;gap:0.7rem;margin-top:auto; }
.projects-cta { text-align:center; }

/* ============================================================
   CONTACT
============================================================ */
.contact { background:var(--bg-alt); }
.contact-layout { display:grid;grid-template-columns:1fr 1.4fr;gap:clamp(2rem,5vw,4rem);align-items:start; }
.contact-intro { font-size:0.97rem;color:var(--text-sec);line-height:1.8;margin-bottom:1.8rem; }
.contact-items { display:flex;flex-direction:column;gap:0.8rem; }
.contact-item { display:flex;align-items:center;gap:1rem;padding:1.05rem 1.2rem;border-radius:var(--r);cursor:pointer;transition:transform var(--fast),border-color var(--fast),box-shadow var(--fast); }
.contact-item:hover { transform:translateX(6px);border-color:var(--accent-30);box-shadow:var(--sh-md); }
.contact-item-icon { width:42px;height:42px;border-radius:10px;background:var(--primary-light);border:1px solid var(--primary-20);display:flex;align-items:center;justify-content:center;color:var(--primary);font-size:1.15rem;flex-shrink:0;transition:background var(--fast),color var(--fast),transform var(--fast); }
.contact-item:hover .contact-item-icon { background:var(--primary);color:#fff;transform:scale(1.1) rotate(-6deg); }
.contact-label { display:block;font-family:var(--mono);font-size:0.68rem;font-weight:500;letter-spacing:0.1em;text-transform:uppercase;color:var(--text-muted); }
.contact-value { display:block;font-size:0.87rem;font-weight:500;color:var(--text);margin-top:0.1rem; }

.contact-form-wrap { padding:1.9rem; }
.contact-form { display:flex;flex-direction:column;gap:1.15rem; }
.form-row { display:grid;grid-template-columns:1fr 1fr;gap:1.15rem; }
.form-group { display:flex;flex-direction:column;gap:0.4rem; }
.form-group label { font-family:var(--mono);font-size:0.7rem;font-weight:500;letter-spacing:0.09em;text-transform:uppercase;color:var(--text-sec); }
.form-group input,
.form-group textarea { background:var(--bg);border:1.5px solid var(--border);border-radius:10px;padding:0.75rem 0.95rem;font-family:var(--font);font-size:0.9rem;color:var(--text);resize:vertical;outline:none;transition:border-color var(--fast),box-shadow 0.25s var(--ease),transform var(--fast); }
.form-group input::placeholder,.form-group textarea::placeholder { color:var(--text-muted); }
.form-group input:focus,.form-group textarea:focus { border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-10);transform:scale(1.005); }
.form-message { font-size:0.86rem;text-align:center;border-radius:8px;padding:0; }
.form-message.success { background:#ECFDF5;border:1px solid #A7F3D0;color:#059669;padding:0.65rem 1rem; }
.form-message.error   { background:#FEF2F2;border:1px solid #FECACA;color:#DC2626;padding:0.65rem 1rem; }

/* ============================================================
   FOOTER
============================================================ */
.footer { background:var(--text);border-top:1px solid rgba(255,255,255,0.06);padding:3.2rem 0 0; }
.footer-container { display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:2rem;align-items:center;padding-bottom:2.8rem; }
.footer-logo { color:#fff !important; }
.footer-logo .logo-bracket { color:rgba(255,255,255,0.3); }
.footer-logo .logo-accent  { color:var(--accent); }
.footer-brand p { font-size:0.86rem;color:rgba(255,255,255,0.42);margin-top:0.6rem;max-width:230px; }
.footer-links { display:flex;flex-direction:column;gap:0.6rem;overflow:hidden; }
.footer-links a { font-size:0.86rem;color:rgba(255,255,255,0.48); }

.footer-social { display:flex;gap:0.6rem;flex-wrap:wrap;justify-content:flex-end; }
.footer-social a {
  width:38px;height:38px;border-radius:9px;
  background:rgba(255,255,255,0.06);border:1px solid rgba(255,255,255,0.10);
  display:flex;align-items:center;justify-content:center;
  color:rgba(255,255,255,0.48);font-size:1.05rem;
  transition:all var(--fast);
  overflow:hidden;
}
.footer-social a:hover { color:var(--accent);border-color:var(--accent);background:rgba(19,185,253,0.12);transform:translateY(-3px) scale(1.08);box-shadow:0 6px 16px rgba(19,185,253,0.2); }

/* Footer custom image icons (LeetCode, HackMD) */
.footer-social-img { padding:6px; }
.footer-social-custom-icon { width:100%;height:100%;object-fit:contain;border-radius:3px;display:block;filter:brightness(0.7); }
.footer-social a.footer-social-img:hover .footer-social-custom-icon { filter:brightness(1); }

.footer-bottom { border-top:1px solid rgba(255,255,255,0.06);padding:1.2rem 0;text-align:center; }
.footer-bottom p { font-size:0.8rem;color:rgba(255,255,255,0.28); }
.footer-bottom .heart { color:#F87171; }

/* ============================================================
   BACK TO TOP
============================================================ */
.back-to-top {
  position:fixed;bottom:2rem;right:2rem;
  width:44px;height:44px;border-radius:12px;
  background:var(--gradient);color:#fff;font-size:1.1rem;border:none;
  display:flex;align-items:center;justify-content:center;
  z-index:999;box-shadow:0 4px 18px var(--accent-30);
  opacity:0;pointer-events:none;
  transform:translateY(14px) scale(0.85);
  transition:opacity var(--med),transform var(--med),box-shadow var(--fast);
}
.back-to-top.visible { opacity:1;pointer-events:all;transform:translateY(0) scale(1); }
.back-to-top:hover   { transform:translateY(-4px) scale(1.08);box-shadow:0 10px 28px rgba(19,185,253,0.45); }