:root {
  --white: #ffffff;
  --navy-900: #0b1b2b;
  --navy-800: #0f2540;
  --navy-700: #153a5b;
  --teal-500: #17b8c1;
  --teal-400: #2bd0d5;
  --teal-300: #4ddce6;
  --muted: #eef3f7;
  --text: #0f1b2d;
  --shadow: 0 10px 30px rgba(10, 30, 60, 0.12);
  --shadow-lg: 0 20px 60px rgba(23, 184, 193, 0.15);
  --gradient-1: linear-gradient(135deg, #17b8c1 0%, #0f2540 100%);
  --gradient-2: linear-gradient(135deg, #2bd0d5 0%, #17b8c1 100%);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: 'Inter', system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  color: var(--text);
  background: linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
  line-height: 1.6;
  position: relative;
  overflow-x: hidden;
}
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: 
    radial-gradient(circle at 20% 50%, rgba(23, 184, 193, 0.03) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(15, 37, 64, 0.03) 0%, transparent 50%);
  pointer-events: none;
  z-index: 0;
}
body > * { position: relative; z-index: 1; }

.container {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 20px;
}

.narrow { max-width: 800px; }

/* Header / Navbar */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255,255,255,0.9);
  backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid rgba(23, 184, 193, 0.1);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
}
.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.icon-btn.small { width: 34px; height: 34px; border-radius: 8px; }
.brand {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--gradient-1);
  color: var(--white);
  font-weight: 800;
  letter-spacing: 0.5px;
  text-decoration: none;
  box-shadow: 0 4px 15px rgba(23, 184, 193, 0.3);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.brand:hover {
  transform: translateY(-2px) scale(1.05);
  box-shadow: 0 6px 20px rgba(23, 184, 193, 0.4);
}
.nav-list {
  list-style: none;
  display: flex;
  gap: 18px;
  margin: 0;
  padding: 0;
}
.nav-link {
  display: inline-block;
  padding: 8px 12px;
  border-radius: 8px;
  text-decoration: none;
  color: var(--navy-800);
  font-weight: 500;
  position: relative;
  transition: color .3s ease, transform .3s ease;
}
.nav-link::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 12px;
  right: 12px;
  height: 2px;
  background: var(--gradient-2);
  transform: scaleX(0);
  transition: transform 0.3s ease;
  border-radius: 2px;
}
.nav-link:hover {
  color: var(--teal-500);
  transform: translateY(-1px);
}
.nav-link:hover::after {
  transform: scaleX(1);
}
.nav-link.active { 
  color: var(--teal-500);
}
.nav-link.active::after {
  transform: scaleX(1);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
}
.nav-toggle .bar {
  display: block;
  width: 24px; height: 2px; background: var(--navy-800); margin: 5px 0; transition: .2s;
}

/* Sections */
.section { padding: 100px 0; }
.section-alt { 
  padding: 100px 0; 
  background: linear-gradient(180deg, #f0f5f9 0%, #e8f0f5 100%);
  position: relative;
}
.section-alt::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--gradient-2);
  opacity: 0.3;
}
.section-title { 
  font-size: 36px; 
  margin: 0 0 32px; 
  background: var(--gradient-1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.5px;
  font-weight: 700;
  position: relative;
  display: inline-block;
}
.section-title::after {
  content: '';
  position: absolute;
  bottom: -8px;
  left: 0;
  width: 60px;
  height: 4px;
  background: var(--gradient-2);
  border-radius: 2px;
}
.lead { font-size: 19px; color: #253245; line-height: 1.7; }

/* Hero */
.hero { padding-top: 120px; position: relative; }
.grid-2 { display: grid; grid-template-columns: 1.2fr 0.8fr; gap: 28px; align-items: center; }
.title { 
  font-size: 64px; 
  line-height: 1.1; 
  margin: 0 0 16px; 
  background: linear-gradient(135deg, #0f2540 0%, #17b8c1 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-weight: 800;
  letter-spacing: -1px;
}
.subtitle { font-size: 20px; color: #4a5568; margin: 0 0 24px; font-weight: 400; }
.socials { display: flex; gap: 12px; margin: 20px 0 28px; }
.icon-btn { 
  width: 48px; 
  height: 48px; 
  display: inline-flex; 
  align-items: center; 
  justify-content: center; 
  border-radius: 12px; 
  border: 2px solid rgba(23, 184, 193, 0.2); 
  color: var(--navy-800); 
  text-decoration: none; 
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(10px);
}
.icon-btn:hover { 
  transform: translateY(-4px) scale(1.05); 
  background: var(--gradient-2);
  color: white;
  border-color: transparent;
  box-shadow: 0 8px 25px rgba(23, 184, 193, 0.3);
}
.cta { display: flex; gap: 16px; flex-wrap: wrap; }
.btn { 
  display: inline-flex; 
  align-items: center; 
  justify-content: center; 
  height: 48px; 
  padding: 0 24px; 
  border-radius: 12px; 
  text-decoration: none; 
  font-weight: 600; 
  letter-spacing: 0.3px; 
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  font-size: 15px;
}
.btn-primary { 
  background: var(--gradient-1); 
  color: var(--white); 
  box-shadow: 0 8px 25px rgba(23, 184, 193, 0.25);
  border: none;
}
.btn-primary:hover { 
  transform: translateY(-3px) scale(1.02); 
  box-shadow: 0 12px 35px rgba(23, 184, 193, 0.35);
}
.btn-ghost { 
  background: rgba(255, 255, 255, 0.9); 
  color: var(--navy-800); 
  border: 2px solid rgba(23, 184, 193, 0.3);
  backdrop-filter: blur(10px);
}
.btn-ghost:hover { 
  background: rgba(23, 184, 193, 0.1);
  border-color: var(--teal-500);
  transform: translateY(-2px);
  color: var(--teal-500);
}

.hero-visual { position: relative; height: 320px; }
.orb { position: absolute; border-radius: 999px; filter: blur(40px); opacity: 0.7; }
.orb-teal { 
  width: 200px; 
  height: 200px; 
  background: radial-gradient(circle, var(--teal-400) 0%, rgba(23,184,193,0.3) 50%, transparent 100%); 
  right: 20px; 
  top: 20px; 
  animation: float 8s ease-in-out infinite, pulse 4s ease-in-out infinite;
}
.orb-navy { 
  width: 260px; 
  height: 260px; 
  background: radial-gradient(circle, rgba(15, 37, 64, 0.4) 0%, rgba(10,30,60,0.2) 50%, transparent 100%); 
  left: 10px; 
  bottom: 0; 
  animation: float 10s ease-in-out infinite reverse, pulse 5s ease-in-out infinite reverse;
}
@keyframes float { 
  0%, 100% { transform: translateY(0) translateX(0); } 
  50% { transform: translateY(-20px) translateX(10px); } 
}
@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 0.7; }
  50% { transform: scale(1.1); opacity: 0.9; }
}

/* Cards / Projects */
.projects-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.card { 
  background: linear-gradient(135deg, rgba(255,255,255,0.95) 0%, rgba(255,255,255,0.9) 100%);
  border: 1px solid rgba(23, 184, 193, 0.15);
  border-radius: 18px; 
  padding: 24px; 
  box-shadow: 0 8px 30px rgba(10, 30, 60, 0.08), 0 0 0 1px rgba(255,255,255,0.5) inset;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}
.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-2);
  transform: scaleX(0);
  transition: transform 0.4s ease;
  transform-origin: left;
}
.card:hover::before {
  transform: scaleX(1);
}
.card:hover { 
  transform: translateY(-8px) scale(1.02); 
  box-shadow: 0 20px 60px rgba(23, 184, 193, 0.2), 0 0 0 1px rgba(23, 184, 193, 0.3);
  border-color: rgba(23, 184, 193, 0.4);
}
.card-title { 
  margin: 0 0 12px; 
  font-size: 20px; 
  color: var(--navy-900);
  font-weight: 700;
  letter-spacing: -0.3px;
}
.chip-row { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 14px; }
.chip { 
  display: inline-flex; 
  align-items: center; 
  height: 30px; 
  padding: 0 12px; 
  border-radius: 20px; 
  font-size: 12px; 
  font-weight: 600;
  background: linear-gradient(135deg, rgba(23,184,193,0.15) 0%, rgba(23,184,193,0.08) 100%);
  color: var(--navy-800); 
  border: 1px solid rgba(23,184,193,0.3);
  transition: all 0.3s ease;
}
.chip:hover {
  background: var(--gradient-2);
  color: white;
  border-color: transparent;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(23, 184, 193, 0.3);
}
.card-body { margin: 0 0 16px; color: #4a5568; line-height: 1.6; font-size: 15px; }
.card-actions { display: flex; gap: 14px; padding-top: 8px; border-top: 1px solid rgba(23, 184, 193, 0.1); }
.link { 
  display: inline-flex; 
  align-items: center; 
  gap: 8px; 
  text-decoration: none; 
  color: var(--navy-800); 
  font-weight: 600;
  font-size: 14px;
  transition: all 0.3s ease;
  padding: 4px 0;
}
.link:hover { 
  color: var(--teal-500);
  transform: translateX(4px);
}
.link i {
  transition: transform 0.3s ease;
}
.link:hover i {
  transform: scale(1.2);
}
.hidden { display: none; }
.center-row { display: flex; justify-content: center; margin-top: 32px; }
.center-row .btn {
  min-width: 140px;
  font-size: 15px;
  font-weight: 600;
}

/* Achievements */
.achievements-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.achievement { 
  display: flex; 
  gap: 16px; 
  align-items: flex-start; 
  background: linear-gradient(135deg, rgba(255,255,255,0.95) 0%, rgba(255,255,255,0.9) 100%);
  border: 1px solid rgba(23, 184, 193, 0.15);
  border-radius: 16px; 
  padding: 20px; 
  box-shadow: 0 6px 25px rgba(10, 30, 60, 0.08);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}
.achievement::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--gradient-2);
  transform: scaleY(0);
  transition: transform 0.3s ease;
  transform-origin: top;
}
.achievement:hover::before {
  transform: scaleY(1);
}
.achievement:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(23, 184, 193, 0.15);
  border-color: rgba(23, 184, 193, 0.3);
}
.achievement i { 
  font-size: 28px; 
  background: var(--gradient-2);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  flex-shrink: 0;
  margin-top: 2px;
}
.achievement h4 { margin: 0 0 8px; font-size: 17px; color: var(--navy-900); font-weight: 700; }
.achievement p { margin: 0; color: #4a5568; font-size: 14px; line-height: 1.5; }

/* Experience */
.experience-list { position: relative; margin-left: 10px; padding-left: 20px; }
.experience-list::before { 
  content: ""; 
  position: absolute; 
  left: 12px; 
  top: 0; 
  bottom: 0; 
  width: 3px; 
  background: var(--gradient-2);
  border-radius: 2px;
  opacity: 0.3;
}
.xp-card { 
  position: relative; 
  display: flex; 
  gap: 16px; 
  padding: 20px 20px 20px 48px; 
  margin: 16px 0; 
  background: linear-gradient(135deg, rgba(255,255,255,0.95) 0%, rgba(255,255,255,0.9) 100%);
  border: 1px solid rgba(23, 184, 193, 0.15);
  border-radius: 16px; 
  box-shadow: 0 6px 25px rgba(10, 30, 60, 0.08);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
.xp-card:hover {
  transform: translateX(8px);
  box-shadow: 0 12px 40px rgba(23, 184, 193, 0.15);
  border-color: rgba(23, 184, 193, 0.3);
}
.xp-dot { 
  position: absolute; 
  left: 4px; 
  top: 24px; 
  width: 16px; 
  height: 16px; 
  border-radius: 999px; 
  background: var(--gradient-2);
  box-shadow: 0 0 0 4px rgba(23,184,193,0.15), 0 4px 12px rgba(23, 184, 193, 0.3);
  z-index: 2;
}
.xp-content h3 { 
  margin: 0 0 8px; 
  color: var(--navy-900); 
  font-size: 18px; 
  font-weight: 700;
  background: var(--gradient-1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.xp-content p { margin: 0; color: #4a5568; font-size: 15px; line-height: 1.5; }

/* Contact / Footer */
.contact-row { display: flex; flex-wrap: wrap; gap: 16px; justify-content: center; margin-top: 24px; }
.contact-link { 
  display: inline-flex; 
  align-items: center; 
  gap: 12px; 
  color: var(--navy-800); 
  text-decoration: none; 
  border: 2px solid rgba(23, 184, 193, 0.2);
  padding: 14px 20px; 
  border-radius: 14px; 
  background: linear-gradient(135deg, rgba(255,255,255,0.95) 0%, rgba(255,255,255,0.9) 100%);
  box-shadow: 0 4px 15px rgba(10, 30, 60, 0.06);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  font-weight: 600;
  font-size: 15px;
}
.contact-link:hover { 
  color: var(--teal-500); 
  border-color: var(--teal-500);
  background: linear-gradient(135deg, rgba(23, 184, 193, 0.08) 0%, rgba(23, 184, 193, 0.04) 100%);
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(23, 184, 193, 0.2);
}
.contact-link i {
  font-size: 18px;
  transition: transform 0.3s ease;
}
.contact-link:hover i {
  transform: scale(1.2) rotate(5deg);
}

.footer { 
  border-top: 1px solid rgba(23, 184, 193, 0.15); 
  padding: 32px 0; 
  background: linear-gradient(180deg, rgba(255,255,255,0.95) 0%, rgba(248,250,252,0.95) 100%);
  backdrop-filter: blur(10px);
}
.footer-row { display: flex; align-items: center; justify-content: space-between; }
.footer .socials a { 
  color: var(--navy-800); 
  margin-left: 16px; 
  text-decoration: none; 
  font-size: 20px;
  transition: all 0.3s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: rgba(23, 184, 193, 0.08);
}
.footer .socials a:hover { 
  color: white;
  background: var(--gradient-2);
  transform: translateY(-3px) scale(1.1);
  box-shadow: 0 6px 20px rgba(23, 184, 193, 0.3);
}

/* Scroll reveal */
.reveal-up { opacity: 0; transform: translateY(16px); transition: opacity .6s ease, transform .6s ease; }
.reveal-up.is-visible { opacity: 1; transform: translateY(0); }
.delay-1 { transition-delay: .15s; }

/* Responsive */
@media (max-width: 960px) {
  .grid-2 { grid-template-columns: 1fr; }
  .projects-grid { grid-template-columns: repeat(2, 1fr); }
  .achievements-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 680px) {
  .title { font-size: 44px; }
  .section-title { font-size: 28px; }
  .section { padding: 70px 0; }
  .section-alt { padding: 70px 0; }
  .projects-grid { grid-template-columns: 1fr; }
  .achievements-grid { grid-template-columns: 1fr; }
  .nav-toggle { display: inline-block; }
  .nav-list { 
    position: absolute; 
    right: 20px; 
    top: 64px; 
    background: rgba(255,255,255,0.98);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(23, 184, 193, 0.2); 
    border-radius: 16px; 
    padding: 12px; 
    box-shadow: 0 12px 40px rgba(10, 30, 60, 0.15); 
    display: none; 
    flex-direction: column; 
    min-width: 180px;
  }
  .nav-list.open { display: flex; }
  .hero-visual { height: 200px; }
  .orb-teal { width: 120px; height: 120px; }
  .orb-navy { width: 160px; height: 160px; }
  .footer-row { flex-direction: column; gap: 16px; text-align: center; }
}