:root {
  --bg-0: #07111f;
  --bg-1: #0b1b31;
  --panel: rgba(12, 27, 49, 0.66);
  --line: rgba(120, 170, 220, 0.26);
  --text: #eaf5ff;
  --text-dim: #b7cbe0;
  --brand: #1db3ff;
  --brand-2: #ff9f1c;
  --radius: 18px;
  --shadow: 0 16px 44px rgba(2, 8, 20, 0.55);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  font-family: "Sora", "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at 12% 15%, rgba(29, 179, 255, 0.2), transparent 30%),
    radial-gradient(circle at 86% 18%, rgba(255, 159, 28, 0.22), transparent 32%),
    linear-gradient(180deg, var(--bg-0) 0%, #050d18 100%);
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -2;
  background-image:
    linear-gradient(rgba(117, 171, 223, 0.09) 1px, transparent 1px),
    linear-gradient(90deg, rgba(117, 171, 223, 0.09) 1px, transparent 1px);
  background-size: 40px 40px;
  animation: matrixMove 22s linear infinite;
}

.bg-layer {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -1;
  overflow: hidden;
}

.bg-orb {
  position: absolute;
  border-radius: 999px;
  filter: blur(12px);
  opacity: 0.4;
  animation: orbFloat 15s ease-in-out infinite;
}

.bg-orb-a {
  width: 290px;
  height: 290px;
  left: -90px;
  top: 120px;
  background: radial-gradient(circle at 30% 30%, rgba(29, 179, 255, 0.95), rgba(29, 179, 255, 0.2));
}

.bg-orb-b {
  width: 270px;
  height: 270px;
  right: -70px;
  top: 290px;
  background: radial-gradient(circle at 30% 30%, rgba(255, 159, 28, 0.95), rgba(255, 159, 28, 0.2));
  animation-delay: -5s;
}

.bg-orb-c {
  width: 220px;
  height: 220px;
  left: 45%;
  bottom: -50px;
  background: radial-gradient(circle at 30% 30%, rgba(111, 175, 255, 0.8), rgba(111, 175, 255, 0.2));
  animation-delay: -8s;
}

.container {
  width: min(1140px, 92vw);
  margin: 0 auto;
}

.section {
  padding: 96px 0;
}

.section-soft {
  background: linear-gradient(180deg, rgba(10, 26, 48, 0.5), rgba(8, 20, 37, 0.78));
  border-top: 1px solid rgba(117, 171, 223, 0.15);
  border-bottom: 1px solid rgba(117, 171, 223, 0.15);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid rgba(117, 171, 223, 0.18);
  backdrop-filter: blur(10px);
  background: rgba(4, 12, 22, 0.7);
}

.nav-wrap {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}

.brand {
  text-decoration: none;
  color: #f5fbff;
  font-weight: 700;
  letter-spacing: 0.3px;
  display: inline-flex;
  flex-direction: column;
  line-height: 1.05;
}

.brand span {
  font-family: "JetBrains Mono", "Consolas", monospace;
  color: var(--text-dim);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
}

.main-nav {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 12px;
}

.main-nav a {
  text-decoration: none;
  color: var(--text);
  font-size: 0.95rem;
  padding: 8px 12px;
  border-radius: 999px;
  transition: background-color 0.25s ease, transform 0.25s ease;
}

.main-nav a:hover {
  background: rgba(29, 179, 255, 0.2);
  transform: translateY(-1px);
}

.hero {
  padding-top: 68px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 24px;
  align-items: start;
}

.kicker,
.section-kicker,
.mono {
  margin: 0;
  font-family: "JetBrains Mono", "Consolas", monospace;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: #8fccff;
  font-size: 0.79rem;
}

.hero-content h1 {
  margin: 14px 0 0;
  font-size: clamp(2rem, 5vw, 3.5rem);
  line-height: 1.08;
  color: #f7fcff;
}

.subtitle {
  margin: 14px 0 0;
  color: var(--text-dim);
  max-width: 62ch;
  line-height: 1.6;
}

.hero-tags {
  margin-top: 16px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.hero-tags span {
  border: 1px solid var(--line);
  background: rgba(14, 34, 60, 0.75);
  border-radius: 999px;
  padding: 7px 11px;
  font-size: 0.84rem;
}

.cta-row {
  margin-top: 20px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.btn {
  text-decoration: none;
  border: 1px solid transparent;
  border-radius: 12px;
  padding: 11px 17px;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.25s ease, box-shadow 0.25s ease, background-color 0.25s ease;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  color: #ffffff;
  background: linear-gradient(130deg, #149be8, #1db3ff, #47c5ff);
  box-shadow: 0 12px 24px rgba(29, 179, 255, 0.34);
}

.btn-primary:hover {
  box-shadow: 0 15px 30px rgba(29, 179, 255, 0.45);
}

.btn-ghost {
  color: var(--text);
  border-color: var(--line);
  background: rgba(13, 28, 48, 0.84);
}

.hero-contact {
  margin-top: 18px;
  display: grid;
  gap: 8px;
}

.hero-contact a {
  color: #d3e8ff;
  text-decoration: none;
  font-size: 0.94rem;
}

.hero-contact a:hover {
  color: #ffffff;
  text-decoration: underline;
}

.hero-card,
.panel,
.stat-card,
.project-card,
.contact-form {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  backdrop-filter: blur(7px);
  box-shadow: var(--shadow);
}

.hero-card {
  padding: 20px;
}

.profile-photo-frame {
  margin: 0 0 14px;
  width: 100%;
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid rgba(132, 186, 240, 0.34);
  background: linear-gradient(150deg, rgba(26, 53, 87, 0.95), rgba(11, 29, 50, 0.95));
  aspect-ratio: 4 / 5;
  position: relative;
  display: grid;
  place-items: center;
}

.profile-photo {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.profile-photo-fallback {
  display: none;
  margin: 0;
  padding: 0 14px;
  text-align: center;
  color: #b8d8f8;
  font-size: 0.9rem;
  line-height: 1.4;
}

.profile-photo-frame.no-photo .profile-photo-fallback {
  display: block;
}

.hero-card p {
  margin: 10px 0 0;
  color: var(--text-dim);
  line-height: 1.65;
}

.section-title {
  margin: 10px 0 0;
  font-size: clamp(1.6rem, 4vw, 2.5rem);
  line-height: 1.12;
}

.stats-grid {
  margin-top: 22px;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.stat-card {
  padding: 18px;
}

.stat-value {
  margin: 0;
  font-size: 1.9rem;
  font-weight: 700;
  color: #f8fdff;
}

.stat-label {
  margin: 6px 0 0;
  color: var(--text-dim);
  line-height: 1.5;
  font-size: 0.9rem;
}

.timeline {
  margin-top: 22px;
  border-left: 2px solid rgba(29, 179, 255, 0.4);
  padding-left: 17px;
}

.timeline-item {
  position: relative;
  padding: 18px;
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: -24px;
  top: 18px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: linear-gradient(120deg, var(--brand), var(--brand-2));
  box-shadow: 0 0 0 5px rgba(29, 179, 255, 0.15);
}

.timeline-item p {
  margin: 10px 0 0;
  color: var(--text-dim);
  line-height: 1.6;
}

.projects-grid {
  margin-top: 22px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.project-card {
  padding: 18px;
}

.project-card ul {
  margin: 12px 0 0;
  padding-left: 18px;
  display: grid;
  gap: 8px;
  color: var(--text-dim);
  line-height: 1.5;
}

.project-card a {
  margin-top: 14px;
  display: inline-block;
  color: #8fceff;
  text-decoration: none;
  font-weight: 600;
}

.project-card a:hover {
  text-decoration: underline;
  color: #ffffff;
}

.ring-wrapper {
  margin-top: 24px;
  padding: 20px 10px;
}

.ring-stage {
  --orbit-scale: 1;
  position: relative;
  width: min(94vw, 620px);
  height: min(94vw, 620px);
  margin: 0 auto;
}

.ring {
  position: absolute;
  left: 50%;
  top: 50%;
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transform-origin: center;
}

.ring-outer {
  --ring-duration: 36s;
  width: 100%;
  height: 100%;
  border: 2px solid rgba(29, 179, 255, 0.45);
  box-shadow: inset 0 0 35px rgba(29, 179, 255, 0.16), 0 0 18px rgba(29, 179, 255, 0.18);
  animation: ringSpinCw var(--ring-duration) linear infinite;
}

.ring-middle {
  --ring-duration: 28s;
  width: 74%;
  height: 74%;
  border: 2px dashed rgba(255, 159, 28, 0.52);
  box-shadow: inset 0 0 30px rgba(255, 159, 28, 0.14), 0 0 14px rgba(255, 159, 28, 0.2);
  animation: ringSpinCcw var(--ring-duration) linear infinite;
}

.ring-inner {
  --ring-duration: 20s;
  width: 48%;
  height: 48%;
  border: 2px solid rgba(148, 197, 255, 0.56);
  box-shadow: inset 0 0 24px rgba(148, 197, 255, 0.17), 0 0 12px rgba(148, 197, 255, 0.2);
  animation: ringSpinCw var(--ring-duration) linear infinite;
}

.orbit-item {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: rotate(var(--angle)) translateX(calc(var(--radius) * var(--orbit-scale))) translate(-50%, -50%);
  border: 0;
  background: transparent;
  border-radius: 999px;
  padding: 0;
  white-space: nowrap;
  box-shadow: none;
  pointer-events: none;
}

.logo-dot {
  width: 26px;
  height: 26px;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: "JetBrains Mono", "Consolas", monospace;
  font-size: 0.5rem;
  letter-spacing: 0.02em;
  background: linear-gradient(130deg, rgba(29, 179, 255, 0.94), rgba(255, 159, 28, 0.86));
  color: #04192d;
  font-weight: 700;
  box-shadow: 0 0 0 1px rgba(170, 220, 255, 0.45), 0 6px 14px rgba(0, 10, 20, 0.48);
}

.logo-name {
  display: none;
}

.ring-legend {
  margin-top: 20px;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
}

.ring-legend span {
  border: 1px solid rgba(141, 196, 250, 0.32);
  background: rgba(10, 26, 46, 0.86);
  color: #c9e3ff;
  border-radius: 999px;
  padding: 6px 10px;
  font-size: 0.75rem;
  line-height: 1;
}

.ring-core {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 172px;
  height: 172px;
  transform: translate(-50%, -50%);
  border: 1px solid rgba(127, 179, 236, 0.38);
  border-radius: 50%;
  background: radial-gradient(circle at 35% 35%, rgba(30, 58, 92, 0.95), rgba(8, 18, 33, 0.95));
  display: grid;
  place-items: center;
  text-align: center;
  padding: 16px;
  box-shadow: inset 0 0 24px rgba(29, 179, 255, 0.18), 0 0 18px rgba(29, 179, 255, 0.25);
}

.ring-core p {
  margin: 0;
  font-size: 0.7rem;
  color: #8dccff;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.ring-core h3 {
  margin: 6px 0 0;
  font-size: 1.05rem;
}

.skill-grid {
  margin-top: 26px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.panel {
  padding: 18px;
}

.panel h3 {
  margin: 0;
  font-size: 1.1rem;
}

.panel p {
  margin: 8px 0 0;
  color: var(--text-dim);
  line-height: 1.55;
}

.panel ul {
  margin: 8px 0 0;
  padding-left: 18px;
  display: grid;
  gap: 8px;
  color: var(--text-dim);
  line-height: 1.5;
}

.edu-grid {
  margin-top: 22px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.edu-meta {
  margin-top: 10px;
  color: #ecf6ff;
  font-weight: 600;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  align-items: start;
}

.contact-copy {
  color: var(--text-dim);
  line-height: 1.6;
}

.contact-list {
  margin-top: 14px;
  display: grid;
  gap: 8px;
}

.contact-list a {
  color: #d4e8ff;
  text-decoration: none;
}

.contact-list a:hover {
  color: #ffffff;
  text-decoration: underline;
}

.contact-form {
  display: grid;
  gap: 12px;
}

.contact-form label {
  font-weight: 600;
  font-size: 0.92rem;
  display: grid;
  gap: 6px;
}

.contact-form input,
.contact-form textarea {
  font: inherit;
  color: var(--text);
  border: 1px solid rgba(128, 178, 230, 0.4);
  background: rgba(6, 20, 36, 0.8);
  border-radius: 10px;
  padding: 10px;
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: 2px solid rgba(29, 179, 255, 0.3);
  border-color: #66c6ff;
}

.form-status {
  margin: 2px 0 0;
  min-height: 1.2em;
  color: #8fcfff;
  font-size: 0.82rem;
}

.site-footer {
  margin-top: 38px;
  border-top: 1px solid rgba(121, 171, 219, 0.2);
  background: rgba(5, 15, 28, 0.74);
}

.footer-wrap {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  flex-wrap: wrap;
}

.footer-wrap p {
  margin: 0;
  color: var(--text-dim);
  font-size: 0.9rem;
}

[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.75s ease, transform 0.75s ease;
}

[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

.tilt-card {
  transform: perspective(900px) rotateX(0deg) rotateY(0deg);
  transition: transform 0.2s ease;
  transform-style: preserve-3d;
}

@keyframes orbFloat {
  0%,
  100% { transform: translateY(0px); }
  50% { transform: translateY(-18px); }
}

@keyframes matrixMove {
  0% { transform: translateY(0px); }
  50% { transform: translateY(12px); }
  100% { transform: translateY(0px); }
}

@keyframes ringSpinCw {
  0% { transform: translate(-50%, -50%) rotate(0deg); }
  100% { transform: translate(-50%, -50%) rotate(360deg); }
}

@keyframes ringSpinCcw {
  0% { transform: translate(-50%, -50%) rotate(360deg); }
  100% { transform: translate(-50%, -50%) rotate(0deg); }
}

@media (max-width: 1100px) {
  .stats-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .projects-grid,
  .skill-grid,
  .edu-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 920px) {
  .hero-grid,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .ring-stage {
    --orbit-scale: 0.78;
    width: min(94vw, 520px);
    height: min(94vw, 520px);
  }

  .orbit-item {
    padding: 0;
  }

  .logo-dot {
    width: 20px;
    height: 20px;
    font-size: 0.42rem;
  }

  .logo-name {
    display: none;
  }

  .section {
    padding: 78px 0;
  }
}

@media (max-width: 700px) {
  .site-header {
    position: static;
  }

  .nav-wrap {
    min-height: auto;
    padding: 14px 0;
    flex-direction: column;
    align-items: flex-start;
  }

  .main-nav {
    gap: 6px;
  }

  .main-nav a {
    font-size: 0.9rem;
    padding: 7px 10px;
  }

  .stats-grid,
  .projects-grid,
  .skill-grid,
  .edu-grid {
    grid-template-columns: 1fr;
  }

  .ring-stage {
    --orbit-scale: 0.58;
    width: min(95vw, 420px);
    height: min(95vw, 420px);
  }

  .ring-core {
    width: 138px;
    height: 138px;
    padding: 10px;
  }

  .ring-core h3 {
    font-size: 0.95rem;
  }

  .orbit-item {
    padding: 0;
  }

  .logo-name {
    display: none;
  }

  .ring-legend {
    gap: 6px;
  }

  .ring-legend span {
    font-size: 0.69rem;
    padding: 5px 8px;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation: none !important;
    transition-duration: 0.01ms !important;
    transition-delay: 0ms !important;
  }

  html {
    scroll-behavior: auto;
  }

  [data-reveal] {
    opacity: 1;
    transform: none;
  }
}