*{
  box-sizing: border-box;
}

:root {
  --bg-100: #05050a;
  --bg-200: #0b0f1b;
  --bg-300: #11182b;
  --accent-100: #0ea5e9;
  --accent-200: #38bdf8;
  --accent-300: #7dd3fc;
  --text-100: #f8fafc;
  --text-200: #cbd5f5;
  --text-muted: #8a94b8;
  --stroke: rgba(148, 163, 184, 0.2);
  --shadow-3d: 0 30px 60px rgba(14, 165, 233, 0.15);
  --gradient-hero: radial-gradient(circle at top left, rgba(56, 189, 248, 0.3), transparent),
    radial-gradient(circle at bottom right, rgba(14, 165, 233, 0.2), transparent);
  --transition-base: cubic-bezier(0.34, 1.56, 0.64, 1);
  --header-height: 72px;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Manrope", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg-100);
  color: var(--text-100);
  min-height: 100vh;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

.container {
  width: min(1100px, 92vw);
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 999;
  backdrop-filter: blur(14px);
  background: rgba(5, 5, 10, 0.7);
  border-bottom: 1px solid var(--stroke);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  transform-style: preserve-3d;
  transition: transform 0.6s var(--transition-base);
}

.brand:hover {
  transform: rotateY(-12deg) translateY(-2px);
}

.brand-mark {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--accent-100), var(--accent-300));
  display: grid;
  place-items: center;
  font-weight: 700;
}

.brand-name {
  font-size: 1rem;
}

.site-nav {
  display: flex;
  align-items: center;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  width: 44px;
  height: 44px;
  border: 1px solid var(--stroke);
  border-radius: 12px;
  background: rgba(5, 5, 10, 0.6);
  cursor: pointer;
  justify-content: center;
  align-items: center;
  transition: transform 0.4s var(--transition-base);
}

.nav-toggle-bar {
  width: 20px;
  height: 2px;
  background: var(--text-100);
  border-radius: 10px;
}

.nav-toggle[aria-expanded="true"] {
  transform: rotate(90deg);
}

.nav-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.nav-link {
  position: relative;
  padding: 0.5rem 0;
  color: var(--text-200);
  transition: color 0.3s var(--transition-base);
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent-200), transparent);
  opacity: 0;
  transform: translateY(6px) scaleX(0.5);
  transition: transform 0.4s var(--transition-base), opacity 0.4s ease;
}

.nav-link:hover,
.nav-link:focus-visible {
  color: var(--text-100);
}

.nav-link:hover::after,
.nav-link:focus-visible::after,
.nav-link.active::after {
  opacity: 1;
  transform: translateY(0) scaleX(1);
}

.nav-link.active {
  color: var(--text-100);
}

.hero-section {
  padding: calc(var(--header-height) + 4rem) 0 4rem;
  background: var(--gradient-hero);
  overflow: hidden;
}

.hero-content {
  display: grid;
  gap: 3rem;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  align-items: center;
}

.hero-text h1 {
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  margin-bottom: 1rem;
}

.hero-text p {
  color: var(--text-200);
  max-width: 520px;
}

.eyebrow {
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--accent-200);
}

.hero-actions {
  margin-top: 2rem;
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.875rem 1.75rem;
  border-radius: 999px;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.4s var(--transition-base), box-shadow 0.4s ease, background 0.4s ease;
}

.btn.primary {
  background: linear-gradient(135deg, var(--accent-100), var(--accent-300));
  color: var(--bg-100);
  box-shadow: 0 18px 30px rgba(14, 165, 233, 0.25);
}

.btn.primary:hover {
  transform: translateY(-4px) scale(1.02);
}

.btn.ghost {
  color: var(--accent-200);
  border-color: rgba(125, 211, 252, 0.5);
  background: rgba(14, 165, 233, 0.08);
}

.btn.ghost:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 24px rgba(125, 211, 252, 0.25);
}

.card-3d {
  position: relative;
  width: min(420px, 100%);
  height: 340px;
  perspective: 1200px;
  border-radius: 24px;
}

.card-layer {
  position: absolute;
  inset: 0;
  border-radius: 24px;
  overflow: hidden;
  transform-style: preserve-3d;
}

.layer-grid {
  border: 1px solid rgba(148, 163, 184, 0.2);
  background: linear-gradient(135deg, rgba(56, 189, 248, 0.12), rgba(14, 165, 233, 0.05));
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.4), rgba(0, 0, 0, 1));
}

.layer-terminal {
  padding: 2rem;
  font-family: "Fira Code", "Source Code Pro", monospace;
  background: rgba(5, 8, 20, 0.92);
  color: var(--accent-300);
  transform: translateZ(40px) rotateY(6deg);
  box-shadow: var(--shadow-3d);
}

.layer-terminal code {
  font-size: 0.9rem;
  line-height: 1.6;
  display: block;
  white-space: pre-wrap;
}

.layer-glow {
  background: radial-gradient(circle at 20% 20%, rgba(125, 211, 252, 0.55), transparent);
  transform: translateZ(-20px);
}

.section {
  padding: 4.5rem 0;
}

.section.highlight {
  background: var(--bg-200);
  border-block: 1px solid rgba(148, 163, 184, 0.08);
}

.split {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 3rem;
  align-items: center;
}

.pillars {
  display: grid;
  gap: 1rem;
  list-style: none;
  padding: 0;
  margin: 0;
}

.pillars li {
  padding: 1.2rem 1.5rem;
  border-radius: 18px;
  background: rgba(14, 165, 233, 0.1);
  border: 1px solid rgba(125, 211, 252, 0.18);
  color: var(--accent-300);
  font-weight: 600;
  transition: transform 0.5s var(--transition-base), box-shadow 0.5s ease;
}

.pillars li:hover {
  transform: translateY(-6px) rotateX(6deg);
  box-shadow: var(--shadow-3d);
}

.achievement-grid,
.skills-grid,
.projects-grid,
.service-grid {
  display: grid;
  gap: 2rem;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.achievement-card,
.skill-card,
.project-card,
.service-card,
.detail-card {
  padding: 2rem;
  border-radius: 20px;
  background: linear-gradient(180deg, rgba(17, 24, 43, 0.9), rgba(11, 15, 27, 0.9));
  border: 1px solid rgba(148, 163, 184, 0.15);
  backdrop-filter: blur(10px);
  box-shadow: 0 20px 40px rgba(8, 16, 30, 0.35);
  transition: transform 0.6s var(--transition-base), border-color 0.4s ease;
}

.achievement-card:hover,
.skill-card:hover,
.project-card:hover,
.service-card:hover,
.detail-card:hover {
  transform: translateY(-10px) rotate3d(1, 1, 0, 8deg);
  border-color: rgba(56, 189, 248, 0.4);
}

.project-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
}

.project-tag {
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  background: rgba(14, 165, 233, 0.15);
  color: var(--accent-200);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.stack-marquee {
  overflow: hidden;
  border-radius: 18px;
  border: 1px solid rgba(125, 211, 252, 0.2);
  background: linear-gradient(90deg, rgba(14, 165, 233, 0.1), rgba(111, 133, 178, 0.08));
  perspective: 800px;
}

.stack-track {
  display: inline-flex;
  gap: 3rem;
  padding: 1.5rem 2rem;
  font-weight: 600;
  min-width: 200%;
  animation: marquee 20s linear infinite;
  transform: translateZ(0);
}

.stack-track span {
  color: var(--accent-300);
  text-transform: uppercase;
  letter-spacing: 0.2em;
  transform: translateZ(80px) rotateX(8deg);
}

@keyframes marquee {
  from {
    transform: translateX(0);
  }
  to {
    transform: translateX(-50%);
  }
}

.timeline {
  background: var(--bg-200);
}

.timeline-track {
  display: grid;
  gap: 2rem;
}

.timeline-item {
  padding: 1.5rem 2rem;
  border-left: 2px solid rgba(125, 211, 252, 0.4);
  position: relative;
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: -11px;
  top: 1.4rem;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-100), var(--accent-300));
  box-shadow: 0 0 0 6px rgba(14, 165, 233, 0.15);
}

.timeline-year {
  color: var(--accent-300);
  font-weight: 600;
}

.process-steps {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.process-step {
  position: relative;
  padding: 2rem;
  border-radius: 24px;
  border: 1px solid rgba(125, 211, 252, 0.2);
  background: linear-gradient(160deg, rgba(17, 24, 43, 0.85), rgba(6, 11, 24, 0.9));
  box-shadow: 0 20px 40px rgba(7, 11, 22, 0.4);
}

.process-step::before {
  content: attr(data-step);
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  font-size: 0.95rem;
  letter-spacing: 0.18em;
  color: rgba(125, 211, 252, 0.6);
}

.contact-grid {
  display: grid;
  gap: 3rem;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.contact-form {
  display: grid;
  gap: 1.2rem;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  padding: 2rem;
  border-radius: 24px;
  border: 1px solid rgba(125, 211, 252, 0.2);
  background: rgba(14, 20, 35, 0.9);
  box-shadow: 0 20px 40px rgba(5, 10, 20, 0.4);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-group.full {
  grid-column: 1 / -1;
}

label {
  font-weight: 600;
  color: var(--text-200);
}

input,
select,
textarea {
  padding: 0.85rem 1rem;
  border-radius: 14px;
  border: 1px solid rgba(125, 211, 252, 0.2);
  background: rgba(4, 8, 18, 0.8);
  color: var(--text-100);
  font-family: inherit;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

input:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: rgba(125, 211, 252, 0.6);
  box-shadow: 0 0 0 4px rgba(14, 165, 233, 0.2);
}

.map-placeholder {
  border-radius: 20px;
  border: 1px dashed rgba(56, 189, 248, 0.4);
  min-height: 220px;
  display: grid;
  place-items: center;
  color: var(--accent-300);
  background: rgba(8, 12, 24, 0.6);
  text-transform: uppercase;
  letter-spacing: 0.18em;
}

.cta {
  text-align: center;
  background: linear-gradient(135deg, rgba(14, 165, 233, 0.16), rgba(8, 16, 35, 0.9));
  border-block: 1px solid rgba(125, 211, 252, 0.2);
}

.cta-content {
  display: grid;
  gap: 1.5rem;
  justify-items: center;
  max-width: 640px;
}

.site-footer {
  padding: 2rem 0 3rem;
  background: rgba(3, 5, 12, 0.8);
  border-top: 1px solid var(--stroke);
}

.footer-content {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  align-items: center;
  color: var(--text-muted);
}

.social-links {
  display: flex;
  gap: 1.25rem;
}

.social-links a {
  color: var(--text-200);
  font-weight: 500;
  position: relative;
}

.social-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -6px;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent-200), transparent);
  opacity: 0;
  transform: scaleX(0.4);
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.social-links a:hover::after {
  opacity: 1;
  transform: scaleX(1);
}

/* Animation states */
[data-animate] {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.8s ease, transform 0.8s var(--transition-base);
  transform-style: preserve-3d;
}

[data-animate].is-in-view {
  opacity: 1;
  transform: none;
}

[data-animate="tilt"] {
  transform: perspective(900px) rotateX(10deg) translateY(40px);
}

[data-animate="tilt"].is-in-view {
  transform: perspective(900px) rotateX(0deg) translateY(0);
}

[data-animate="depth"] {
  transform: translateY(40px) scale(0.97);
}

[data-animate="depth"].is-in-view {
  transform: translateY(0) scale(1);
}

[data-animate="depth-card"] {
  transform: rotateY(-12deg) translateY(30px) scale(0.95);
  transition-duration: 1.1s;
}

[data-animate="depth-card"].is-in-view {
  transform: rotateY(0deg) translateY(0) scale(1);
}

[data-animate="rise"] {
  transform: translateY(60px);
}

[data-animate="scroll-3d"] {
  transform-origin: center;
  transform: rotateX(25deg) translateY(40px) scale(0.9);
}

[data-animate="scroll-3d"].is-in-view {
  transform: rotateX(0deg) translateY(0) scale(1);
}

/* Responsive navigation */
@media (max-width: 860px) {
  .nav-toggle {
    display: flex;
  }

  .nav-list {
    position: absolute;
    top: calc(var(--header-height) + 16px);
    right: 1.5rem;
    flex-direction: column;
    gap: 1rem;
    padding: 1.5rem;
    background: rgba(5, 8, 20, 0.95);
    border: 1px solid rgba(148, 163, 184, 0.2);
    border-radius: 18px;
    box-shadow: 0 25px 50px rgba(3, 6, 15, 0.45);
    transform: translateY(-20px) scale(0.95);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.4s var(--transition-base), opacity 0.4s ease;
  }

  .nav-list.open {
    transform: translateY(0) scale(1);
    opacity: 1;
    pointer-events: auto;
  }
}

@media (max-width: 640px) {
  .hero-section {
    padding-top: calc(var(--header-height) + 2rem);
  }

  .card-3d {
    height: 300px;
  }

  .site-footer {
    text-align: center;
  }

  .footer-content {
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}