:root {
  --bg: #0f1420;
  --bg-soft: #171e2d;
  --surface: #202a3c;
  --line: #36435b;
  --text: #f2f5fb;
  --muted: #c1cadb;
  --accent: #ff7720;
  --accent-2: #56b6ff;
  --accent-soft: #ffd4b3;
  --radius: 15px;
  --shadow: 0 18px 38px rgba(0, 0, 0, 0.3);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Poppins", sans-serif;
  color: var(--text);
  background: var(--bg);
}

a {
  color: var(--accent-soft);
  text-decoration: none;
}

a:hover {
  color: #ffe8d8;
}

.container {
  width: min(1120px, 92%);
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 70;
  backdrop-filter: blur(9px);
  background: rgba(15, 20, 32, 0.88);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.nav-wrap {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  font-family: "Roboto Slab", serif;
  font-weight: 700;
  color: #fff;
  letter-spacing: 0.02em;
}

.main-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.main-nav a {
  color: #f3f5fb;
  font-size: 0.9rem;
  font-weight: 600;
}

.main-nav a:hover {
  color: var(--accent);
}

.menu-toggle {
  display: none;
  border: 1px solid var(--line);
  background: transparent;
  border-radius: 10px;
  width: 42px;
  height: 38px;
  padding: 7px 8px;
}

.menu-toggle span {
  display: block;
  height: 2px;
  width: 100%;
  margin: 5px 0;
  background: #fff;
}

.hero {
  position: relative;
  overflow: hidden;
  padding: 84px 0 56px;
  background:
    radial-gradient(circle at 18% 10%, rgba(86, 182, 255, 0.22), transparent 45%),
    radial-gradient(circle at 82% 20%, rgba(255, 119, 32, 0.23), transparent 40%),
    linear-gradient(150deg, #11182a, #1e2737 50%, #131a27 100%);
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background-image: linear-gradient(transparent 98%, rgba(255, 255, 255, 0.06) 100%);
  background-size: 100% 30px;
  opacity: 0.5;
  pointer-events: none;
}

.hero-grid {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 1.2rem;
  align-items: center;
}

.eyebrow {
  margin: 0 0 0.65rem;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent-soft);
  font-weight: 700;
}

h1,
h2,
h3 {
  font-family: "Roboto Slab", serif;
  margin: 0 0 0.72rem;
}

h1 {
  font-size: clamp(1.9rem, 4.8vw, 3.2rem);
  line-height: 1.14;
}

.typed-line {
  margin: 0.55rem 0 0;
  font-size: clamp(1.06rem, 2.2vw, 1.4rem);
  font-weight: 600;
  color: #e6edf9;
}

#phdTyped {
  color: var(--accent);
  border-right: 2px solid var(--accent);
  padding-right: 4px;
}

.hero-text {
  max-width: 680px;
  color: #dce4f2;
  line-height: 1.74;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.25rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  border-radius: 999px;
  padding: 0.62rem 1.18rem;
  border: 1px solid transparent;
  font-weight: 700;
  letter-spacing: 0.01em;
  cursor: pointer;
}

.btn-primary {
  background: linear-gradient(90deg, var(--accent), #f84d0c);
  color: #fff;
}

.btn-primary:hover {
  color: #fff;
  filter: brightness(1.05);
}

.btn-secondary {
  color: #fff;
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.23);
}

.btn-secondary:hover {
  color: #fff;
  border-color: var(--accent-soft);
}

.btn-dark-text {
  color: #172031;
  border-color: #ccd4df;
  background: #fff;
}

.btn-dark-text:hover {
  color: #172031;
  border-color: #ffa46f;
}

.hero-panel {
  display: grid;
  gap: 0.7rem;
}

.hero-panel article {
  background: rgba(30, 39, 55, 0.86);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius);
  padding: 0.9rem;
  box-shadow: var(--shadow);
}

.hero-panel h2 {
  color: var(--accent);
  margin-bottom: 0.2rem;
  font-size: clamp(1.2rem, 3vw, 1.8rem);
}

.hero-panel p {
  margin: 0;
  color: #d8e0ef;
  font-size: 0.9rem;
  line-height: 1.55;
}

.section {
  padding: 78px 0 26px;
}

.section-light {
  background: #f4f6fb;
  color: #111729;
}

.section-dark {
  background: linear-gradient(150deg, #121a2a, #1c2639);
  color: var(--text);
}

.section-head {
  text-align: center;
  margin-bottom: 1.25rem;
}

.section-head h2 {
  font-size: clamp(1.7rem, 3.8vw, 2.55rem);
}

.section-head h2 span {
  color: var(--accent);
}

.subtext {
  margin: 0 0 0.35rem;
  font-weight: 600;
  opacity: 0.75;
}

.split-grid,
.resume-grid {
  display: grid;
  grid-template-columns: 1.12fr 0.88fr;
  gap: 1rem;
}

.card,
.pub-card,
.focus-card,
.timeline-item {
  border-radius: var(--radius);
  padding: 1.05rem;
}

.card {
  background: #fff;
  border: 1px solid #dce2ef;
  box-shadow: 0 14px 28px rgba(19, 26, 40, 0.1);
}

.dark-card {
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.dark-card h3,
.dark-card p,
.dark-card li {
  color: #e5ecf8;
}

.card p {
  margin: 0 0 0.8rem;
  line-height: 1.72;
}

.info-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.45rem;
}

.info-list li {
  line-height: 1.62;
}

.inline-link {
  display: inline-block;
  margin-top: 0.75rem;
  color: #ffd6b8;
  font-weight: 700;
}

.inline-link:hover {
  color: #fff0e1;
}

.filter-row {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin-bottom: 0.95rem;
}

.filter-row button {
  border: 1px solid #5a6780;
  background: rgba(255, 255, 255, 0.06);
  color: #f1f4fb;
  border-radius: 999px;
  min-height: 36px;
  padding: 0.42rem 0.95rem;
  font-weight: 700;
  cursor: pointer;
}

.filter-row button.active {
  border-color: var(--accent);
  background: var(--accent);
  color: #fff;
}

.pub-grid,
.focus-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.95rem;
}

.pub-card,
.focus-card {
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.pub-card p,
.focus-card p {
  margin: 0;
  line-height: 1.66;
  color: #dce3f1;
}

.pub-card.hidden-card {
  display: none;
}

.pill {
  display: inline-block;
  margin: 0 0 0.55rem;
  font-size: 0.74rem;
  font-weight: 700;
  border-radius: 999px;
  padding: 0.25rem 0.55rem;
  color: #702700;
  background: #ffdcbf;
}

.resume-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-bottom: 0.8rem;
}

.resume-preview {
  width: 100%;
  height: 460px;
  border: 1px solid #d9dfeb;
  border-radius: 10px;
  background: #fff;
}

.contact-form {
  display: grid;
  gap: 0.45rem;
}

.contact-form label {
  font-size: 0.9rem;
  font-weight: 600;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  border: 1px solid #d3dae8;
  border-radius: 10px;
  background: #fff;
  color: #111729;
  padding: 0.66rem 0.75rem;
  font: inherit;
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: 2px solid rgba(255, 119, 32, 0.23);
  border-color: #ff9a60;
}

.hidden-field {
  position: absolute;
  left: -99999px;
  opacity: 0;
  pointer-events: none;
}

.form-note {
  margin: 0.2rem 0 0;
  color: #54607a;
  font-size: 0.85rem;
}

.form-success {
  margin: 0.2rem 0 0;
  color: #0b7a56;
  font-size: 0.9rem;
  font-weight: 700;
}

.site-footer {
  background: #0a101a;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-wrap {
  min-height: 72px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.7rem;
  flex-wrap: wrap;
  color: #c5cede;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

.reveal {
  opacity: 0;
  transform: translateY(15px);
  transition: opacity 0.48s ease, transform 0.48s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 1050px) {
  .hero-grid,
  .split-grid,
  .pub-grid,
  .focus-grid,
  .resume-grid {
    grid-template-columns: 1fr;
  }

  .resume-preview {
    height: 360px;
  }
}

@media (max-width: 920px) {
  .menu-toggle {
    display: block;
  }

  .main-nav {
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    gap: 0;
    background: #0f1625;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  }

  .main-nav.open {
    display: flex;
  }

  .main-nav a {
    width: 100%;
    padding: 0.85rem 4%;
    border-top: 1px solid rgba(255, 255, 255, 0.07);
  }
}