/*
  Global Styles
  - Dark mode by default
  - Accessible contrast
  - Fluid typography
*/
:root {
  color-scheme: dark;
  --bg: #0b0f17;
  --bg-elevated: #121927;
  --bg-card: #0f1624;
  --text: #e6edf7;
  --muted: #a9b7d0;
  --accent: #35c7ff;
  --accent-soft: rgba(53, 199, 255, 0.12);
  --border: rgba(255, 255, 255, 0.08);
  --shadow: 0 24px 60px rgba(5, 10, 20, 0.6);
  --radius: 18px;
  --max-width: 1120px;
  --transition: 220ms ease;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Inter", "Segoe UI", system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  letter-spacing: 0.1px;
}

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

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

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

.container {
  width: min(100% - 2rem, var(--max-width));
  margin: 0 auto;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 1rem;
  background: var(--accent);
  color: #06121f;
  padding: 0.5rem 1rem;
  border-radius: 999px;
  font-weight: 600;
  z-index: 200;
}

.skip-link:focus {
  left: 1rem;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Navigation */
.site-header {
  position: sticky;
  top: 0;
  z-index: 120;
  background: rgba(11, 15, 23, 0.85);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--border);
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.4rem 0;
}

.logo {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 700;
  border-radius: 12px;
  border: 1px solid var(--border);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 1.2rem;
}

.nav-menu a {
  color: var(--muted);
  font-weight: 500;
  transition: color var(--transition);
}

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

.nav-toggle {
  display: none;
  background: transparent;
  border: 0;
  cursor: pointer;
}

.nav-toggle .bar {
  display: block;
  width: 22px;
  height: 2px;
  margin: 5px 0;
  background: var(--text);
  transition: transform var(--transition);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.7rem 1.4rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 600;
  transition: transform var(--transition), background var(--transition), color var(--transition), border var(--transition);
}

.btn-primary {
  background: var(--accent);
  color: #07121f;
}

.btn-primary:hover {
  transform: translateY(-1px);
}

.btn-ghost {
  background: transparent;
  border-color: var(--border);
  color: var(--text);
}

.btn-outline {
  border-color: var(--accent);
  color: var(--accent);
}

/* Hero */
.hero {
  position: relative;
  padding: 6rem 0 4rem;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: -20% -10% auto -10%;
  height: 520px;
  background: radial-gradient(
      circle at 20% 30%,
      rgba(53, 199, 255, 0.18),
      transparent 60%
    ),
    radial-gradient(
      circle at 80% 10%,
      rgba(45, 117, 255, 0.16),
      transparent 55%
    );
  filter: blur(40px);
  z-index: 0;
  pointer-events: none;
}

.hero .container {
  position: relative;
  z-index: 1;
}

.hero-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2.5rem;
  align-items: center;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 2px;
  font-size: 0.75rem;
  color: var(--accent);
  font-weight: 600;
  margin: 0 0 0.75rem;
}

.text-rotate {
  display: inline-block;
  position: relative;
  padding-right: 6px;
}

.text-rotate::after {
  content: "";
  position: absolute;
  right: 0;
  top: 15%;
  width: 2px;
  height: 70%;
  background: var(--accent);
  animation: caret-blink 900ms steps(2, start) infinite;
}

@keyframes caret-blink {
  0%,
  50% {
    opacity: 1;
  }
  51%,
  100% {
    opacity: 0;
  }
}

.hero h1 {
  font-size: clamp(2.6rem, 4vw, 3.6rem);
  margin: 0 0 0.4rem;
}

.subtitle {
  font-size: 1.2rem;
  color: var(--muted);
  margin: 0 0 1rem;
}

.lead {
  font-size: 1.05rem;
  color: var(--text);
  max-width: 32rem;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 1.6rem;
}

.hero-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  box-shadow: var(--shadow);
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  font-size: 0.8rem;
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 1rem;
}

.hero-highlights {
  list-style: none;
  padding: 0;
  margin: 1rem 0 1.5rem;
}

.hero-highlights li {
  margin-bottom: 0.6rem;
  color: var(--muted);
}

.hero-meta {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  border-top: 1px solid var(--border);
  padding-top: 1rem;
}

.meta-label {
  margin: 0;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--muted);
}

.meta-value {
  margin: 0.2rem 0 0;
  font-weight: 600;
}

/* Sections */
.section {
  padding: 4rem 0;
}

.section-header {
  margin-bottom: 1.8rem;
}

.section-header h2 {
  margin: 0;
  font-size: clamp(1.8rem, 3vw, 2.4rem);
}

.section-text {
  max-width: 52rem;
  color: var(--muted);
  margin: 0;
}

/* Cards */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  transition: transform var(--transition), border var(--transition);
}

.card:hover {
  transform: translateY(-4px);
  border-color: rgba(53, 199, 255, 0.35);
}

.education-grid {
  display: grid;
  gap: 1.2rem;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

/* Skills - list layout */
.skills-list {
  display: grid;
  gap: 0.2rem;
  border-top: 1px solid var(--border);
}

.skill-row {
  display: grid;
  grid-template-columns: minmax(180px, 1fr) 2.2fr;
  gap: 1.5rem;
  padding: 1.4rem 0;
  border-bottom: 1px solid var(--border);
}

.skill-title h3 {
  margin: 0;
  font-size: 1.05rem;
}

.skill-title p {
  margin: 0.35rem 0 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.skill-items {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem 0.9rem;
}

.skill-items span {
  padding: 0.5rem 1rem;
  border-radius: 999px;
  border: 1px solid rgba(53, 199, 255, 0.22);
  font-size: 0.85rem;
  color: var(--text);
  background: rgba(53, 199, 255, 0.06);
  display: inline-flex;
  align-items: center;
  white-space: nowrap;
  transition: border var(--transition), background var(--transition);
}

.skill-items span:hover {
  border-color: rgba(53, 199, 255, 0.45);
  background: rgba(53, 199, 255, 0.12);
}

/* Projects - list layout */
.projects-list {
  display: grid;
  gap: 0.2rem;
  border-top: 1px solid var(--border);
}

.project-row {
  display: grid;
  grid-template-columns: minmax(240px, 1.2fr) 1fr;
  gap: 2rem;
  padding: 1.6rem 0;
  border-bottom: 1px solid var(--border);
}

.project-type {
  margin: 0 0 0.5rem;
  text-transform: uppercase;
  letter-spacing: 1.4px;
  font-size: 0.7rem;
  color: var(--accent);
}

.project-desc {
  margin: 0.5rem 0 0;
  color: var(--muted);
}

.project-focus {
  margin: 0 0 0.8rem;
  color: rgba(230, 237, 247, 0.85);
}

.project-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 0.9rem;
  color: var(--muted);
  font-size: 0.85rem;
}

.project-stack span {
  position: relative;
  padding-left: 0.9rem;
}

.project-stack span::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55rem;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent);
}

/* Timeline */
.timeline {
  display: grid;
  gap: 1.6rem;
  position: relative;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 10px;
  top: 0.6rem;
  bottom: 0.6rem;
  width: 1px;
  background: var(--border);
}

.timeline-item {
  display: grid;
  grid-template-columns: 24px 1fr;
  gap: 1.2rem;
  position: relative;
}

.timeline-marker {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 6px rgba(53, 199, 255, 0.12);
  margin-top: 0.35rem;
}

/* Contact */
.contact-card {
  display: grid;
  gap: 1.5rem;
  background: var(--bg-elevated);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  padding: 2rem;
}

.contact-card a {
  color: var(--text);
}

.contact-label {
  margin: 0 0 0.4rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  font-size: 0.7rem;
  color: var(--muted);
}

/* Footer */
.site-footer {
  padding: 2rem 0 3rem;
  border-top: 1px solid var(--border);
  color: var(--muted);
  text-align: center;
}

/* Animations */
[data-animate] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 600ms ease, transform 600ms ease;
}

[data-animate].in-view {
  opacity: 1;
  transform: translateY(0);
}

/* Responsive */
@media (max-width: 900px) {
  .nav-menu {
    position: absolute;
    top: 100%;
    right: 1.5rem;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 1rem;
    flex-direction: column;
    align-items: flex-start;
    min-width: 200px;
    opacity: 0;
    transform: translateY(-10px);
    pointer-events: none;
    transition: opacity var(--transition), transform var(--transition);
  }

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

  .nav-toggle {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
  }

  .skill-row,
  .project-row {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
}

@media (max-width: 600px) {
  .hero {
    padding-top: 4.5rem;
  }

  .hero-card {
    padding: 1.5rem;
  }

  .section {
    padding: 3.2rem 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  * {
    transition: none !important;
    animation: none !important;
  }
}