:root {
  --font-base: "Segoe UI", "Inter", Arial, sans-serif;

  --color-bg-0: #05070d;
  --color-bg-1: #0b1020;
  --color-bg-2: #101a32;
  --color-bg-panel: rgba(255, 255, 255, 0.03);
  --color-bg-panel-strong: rgba(255, 255, 255, 0.06);
  --color-bg-panel-soft: rgba(255, 255, 255, 0.01);
  --color-text: #e8ecff;
  --color-text-muted: #9ca8c7;
  --color-text-soft: #d4def8;
  --color-text-body: #cfdbf7;
  --color-link: #9fd8ff;
  --color-border: rgba(255, 255, 255, 0.12);
  --color-border-strong: rgba(159, 216, 255, 0.5);
  --color-accent: #59c3ff;
  --color-accent-soft: #87daff;
  --color-accent-dark: #041322;
  --color-focus: rgba(89, 195, 255, 0.16);
  --color-white: #ffffff;
  --color-black: #111111;
  --color-navbar-bg-top: rgba(5, 7, 13, 0);
  --color-navbar-bg-scrolled: rgba(5, 7, 13, 0.78);
  --color-hero-radial-a: #182240;
  --color-hero-radial-b: #102c46;
  --color-hero-grid-line: rgba(255, 255, 255, 0.03);
  --color-hero-particle-a: #a6e5ff;
  --color-hero-particle-b: #4cb9f4;
  --color-hero-tagline: #c8d2ee;
  --color-project-index: #8fa2c7;
  --color-project-desc: #d3ddf5;
  --color-glow-border: rgba(146, 206, 255, 0.55);
  --color-glow-ring: rgba(120, 193, 255, 0.2);
  --color-glow-shadow: rgba(90, 188, 255, 0.28);
  --color-about-radial: rgba(126, 201, 255, 0.14);
  --color-about-shape-a0: rgba(92, 212, 255, 0.8);
  --color-about-shape-a1: rgba(92, 212, 255, 0.1);
  --color-about-shape-b0: rgba(173, 112, 255, 0.75);
  --color-about-shape-b1: rgba(173, 112, 255, 0.1);
  --color-about-shape-c0: rgba(86, 255, 188, 0.72);
  --color-about-shape-c1: rgba(86, 255, 188, 0.1);
  --color-about-ring: rgba(170, 194, 242, 0.38);
  --color-grid-cut: rgba(255, 255, 255, 0.05);
  --color-contact-cta: #d9e4ff;
  --color-contact-label: #b7c6e9;
  --color-contact-field-border: rgba(194, 212, 255, 0.24);
  --color-contact-field-focus: rgba(89, 195, 255, 0.7);
  --color-icon-text: #dfebff;
  --color-icon-github-border: rgba(160, 174, 204, 0.65);
  --color-icon-github-shadow: rgba(160, 174, 204, 0.28);
  --color-icon-linkedin-border: rgba(77, 171, 247, 0.68);
  --color-icon-linkedin-shadow: rgba(77, 171, 247, 0.3);
  --color-icon-email-border: rgba(255, 191, 79, 0.7);
  --color-icon-email-shadow: rgba(255, 191, 79, 0.3);
  --color-navbar-mobile-bg: rgba(9, 12, 20, 0.96);
  --color-caret: rgba(89, 195, 255, 0.95);
  --color-shadow-dark: rgba(0, 0, 0, 0.2);
  --color-shadow-card-a: rgba(3, 9, 20, 0.55);
  --color-shadow-card-b: rgba(75, 181, 255, 0.2);

  --color-tag-csharp-text: #f5e9ff;
  --color-tag-csharp-bg: rgba(168, 85, 247, 0.2);
  --color-tag-csharp-border: rgba(192, 132, 252, 0.5);
  --color-tag-mssql-text: #ffe3e8;
  --color-tag-mssql-bg: rgba(239, 68, 68, 0.18);
  --color-tag-mssql-border: rgba(248, 113, 113, 0.5);
  --color-tag-edi-text: #d6fff0;
  --color-tag-edi-bg: rgba(16, 185, 129, 0.2);
  --color-tag-edi-border: rgba(52, 211, 153, 0.52);
  --color-tag-dotnet-text: #dae7ff;
  --color-tag-dotnet-bg: rgba(59, 130, 246, 0.2);
  --color-tag-dotnet-border: rgba(96, 165, 250, 0.5);
  --color-tag-reporting-text: #fff4d8;
  --color-tag-reporting-bg: rgba(245, 158, 11, 0.2);
  --color-tag-reporting-border: rgba(251, 191, 36, 0.5);

  --space-0: 0;
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-7: 2rem;
  --space-8: 2.5rem;
  --space-9: 3rem;
  --space-10: 4rem;
  --space-11: 5.5rem;

  --size-navbar-height: 70px;
  --size-container-max: 1100px;
  --size-container-width: 92vw;
  --size-radius-sm: 0.4rem;
  --size-radius-md: 0.7rem;
  --size-radius-lg: 1rem;
  --size-radius-pill: 999px;
  --size-particle-base: 10px;
  --size-particle-2: 14px;
  --size-particle-3: 8px;
  --size-particle-4: 12px;
  --size-particle-5: 16px;
  --size-particle-6: 9px;
  --size-content-max: 760px;
  --size-about-visual-min: 320px;
  --size-about-visual-min-mobile: 260px;
  --size-skill-card-min-h: 110px;
  --size-project-card-min: 260px;
  --size-skill-card-min: 120px;
  --size-shape-1: 140px;
  --size-shape-2: 86px;
  --size-shape-3: 64px;
  --size-ring-1: 180px;
  --size-ring-2: 120px;
  --size-icon: 1.55rem;
  --size-toggle: 36px;
  --size-toggle-line-w: 22px;
  --size-toggle-line-h: 2px;
  --size-grid-main: 38px;
  --size-grid-about: 26px;

  --shadow-navbar: 0 8px 20px var(--color-shadow-dark);
  --shadow-card: 0 24px 50px var(--color-shadow-card-a), 0 10px 24px var(--color-shadow-card-b);
  --shadow-button: 0 10px 28px rgba(89, 195, 255, 0.35);
  --shadow-button-hover: 0 13px 33px rgba(89, 195, 255, 0.45);
  --shadow-glow-skill: 0 0 0 1px var(--color-glow-ring), 0 0 24px var(--color-glow-shadow);
  --shadow-icon-hover: 0 0 22px;

  --space-12: 0.35rem;
  --space-13: 0.65rem;
  --space-14: 0.68rem;
  --space-15: 0.8rem;
  --space-16: 0.82rem;
  --space-17: 0.85rem;
  --space-18: 0.88rem;
  --space-19: 0.9rem;
  --space-20: 1.1rem;
  --space-21: 1.15rem;
  --space-22: 1.2rem;
  --space-23: 1.35rem;
  --space-24: 1.55rem;

  --duration-fast: 0.2s;
  --duration-base: 0.25s;
  --duration-slow: 0.28s;
}

/* Base */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: var(--space-0);
  font-family: var(--font-base);
  background: var(--color-bg-0);
  color: var(--color-text);
  line-height: 1.5;
}

.layout-container {
  width: min(var(--size-container-max), var(--size-container-width));
  margin: var(--space-0) auto;
}

.section {
  padding: var(--space-11) var(--space-0);
}

.section-header {
  display: flex;
  align-items: baseline;
  gap: var(--space-3);
}

.section-index {
  margin: var(--space-0);
  color: var(--color-text-muted);
}

[data-animate] {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
  will-change: opacity, transform;
}

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

.link-skip {
  position: absolute;
  left: -9999px;
  top: var(--space-4);
  z-index: 1000;
  background: var(--color-white);
  color: var(--color-black);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--size-radius-sm);
}

.link-skip:focus-visible {
  left: var(--space-4);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-18) var(--space-23);
  border-radius: var(--size-radius-pill);
  text-decoration: none;
  font-weight: 700;
  letter-spacing: 0.02em;
  transition: transform var(--duration-fast) ease, box-shadow var(--duration-base) ease, background-color var(--duration-fast) ease;
}

.button-primary {
  color: var(--color-accent-dark);
  background: linear-gradient(135deg, var(--color-accent-soft), var(--color-accent));
  box-shadow: var(--shadow-button);
}

.button-primary:hover,
.button-primary:focus-visible {
  transform: translateY(-1px);
  box-shadow: var(--shadow-button-hover);
}

.site-footer {
  border-top: 1px solid var(--color-border);
  padding: var(--space-20) var(--space-0) var(--space-6);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  gap: var(--space-3);
  flex-wrap: wrap;
}

.to-top {
  color: var(--color-link);
}

/* Navbar */
.navbar {
  position: sticky;
  top: var(--space-0);
  z-index: 50;
  background: var(--color-navbar-bg-top);
  border-bottom: 1px solid transparent;
  transition: background-color var(--duration-base) ease, backdrop-filter var(--duration-base) ease, border-color var(--duration-base) ease, box-shadow var(--duration-base) ease;
}

.navbar.is-scrolled {
  background: var(--color-navbar-bg-scrolled);
  backdrop-filter: blur(10px);
  border-bottom-color: var(--color-border);
  box-shadow: var(--shadow-navbar);
}

.navbar-inner {
  min-height: var(--size-navbar-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.navbar-brand {
  color: var(--color-text);
  text-decoration: none;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.navbar-toggle {
  display: none;
}

.navbar-menu {
  list-style: none;
  display: flex;
  gap: var(--space-5);
  margin: var(--space-0);
  padding: var(--space-0);
}

.navbar-menu a {
  color: var(--color-text-muted);
  text-decoration: none;
  font-weight: 600;
}

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

/* Hero */
.section-hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  isolation: isolate;
  background: radial-gradient(circle at 20% 20%, var(--color-hero-radial-a) 0%, transparent 40%), radial-gradient(circle at 82% 70%, var(--color-hero-radial-b) 0%, transparent 40%), var(--color-bg-0);
}

.section-hero::before {
  content: "";
  position: absolute;
  inset: -30%;
  z-index: -3;
  background: linear-gradient(125deg, var(--color-bg-0), var(--color-bg-1), var(--color-bg-2), var(--color-bg-0));
  background-size: 240% 240%;
  animation: gradientShift 18s ease infinite;
  opacity: 0.9;
}

.section-hero::after {
  content: "";
  position: absolute;
  inset: var(--space-0);
  z-index: -1;
  background-image: linear-gradient(var(--color-hero-grid-line) 1px, transparent 1px), linear-gradient(90deg, var(--color-hero-grid-line) 1px, transparent 1px);
  background-size: var(--size-grid-main) var(--size-grid-main);
  mask-image: radial-gradient(circle at 50% 45%, #000 0%, transparent 74%);
}

.hero-particle-layer {
  position: absolute;
  inset: var(--space-0);
  z-index: -2;
  pointer-events: none;
}

.hero-particle-layer span {
  position: absolute;
  width: var(--size-particle-base);
  aspect-ratio: 1 / 1;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, var(--color-hero-particle-a), var(--color-hero-particle-b) 70%, transparent 100%);
  opacity: 0.28;
  animation: floatUp linear infinite;
}

.hero-particle-layer span:nth-child(1) { left: 8%; bottom: -20px; animation-duration: 14s; animation-delay: 0s; }
.hero-particle-layer span:nth-child(2) { left: 22%; bottom: -40px; width: var(--size-particle-2); animation-duration: 20s; animation-delay: 3s; }
.hero-particle-layer span:nth-child(3) { left: 40%; bottom: -18px; width: var(--size-particle-3); animation-duration: 13s; animation-delay: 1s; }
.hero-particle-layer span:nth-child(4) { left: 58%; bottom: -30px; width: var(--size-particle-4); animation-duration: 18s; animation-delay: 5s; }
.hero-particle-layer span:nth-child(5) { left: 76%; bottom: -35px; width: var(--size-particle-5); animation-duration: 22s; animation-delay: 2s; }
.hero-particle-layer span:nth-child(6) { left: 90%; bottom: -22px; width: var(--size-particle-6); animation-duration: 16s; animation-delay: 6s; }

.hero-grid {
  width: 100%;
  padding-top: var(--size-navbar-height);
}

.hero-content {
  max-width: var(--size-content-max);
}

.hero-eyebrow {
  margin: var(--space-0) var(--space-0) var(--space-15);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

#hero-title {
  margin: var(--space-0);
  font-size: clamp(2.9rem, 8vw, 7rem);
  line-height: 0.96;
  letter-spacing: -0.02em;
}

.hero-tagline {
  margin: var(--space-5) var(--space-0) var(--space-0);
  font-size: clamp(1.05rem, 2vw, 1.4rem);
  color: var(--color-hero-tagline);
  max-width: 62ch;
}

.hero-typing-line {
  margin: var(--space-4) var(--space-0) var(--space-0);
  font-size: clamp(1rem, 1.7vw, 1.25rem);
  color: var(--color-text-muted);
}

.hero-typing-skill {
  color: var(--color-accent);
  font-weight: 700;
  border-right: 2px solid var(--color-caret);
  padding-right: 0.15rem;
  animation: caretBlink 1s steps(1, end) infinite;
}

.hero-action-row {
  margin-top: var(--space-7);
}

/* Projects */
.section-projects {
  padding-top: var(--space-10);
}

.grid-projects {
  display: grid;
  gap: var(--space-5);
  grid-template-columns: repeat(auto-fit, minmax(var(--size-project-card-min), 1fr));
}

.card-project {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--color-border);
  border-radius: var(--size-radius-lg);
  padding: var(--space-21);
  background: linear-gradient(160deg, var(--color-bg-panel-strong), var(--color-bg-panel-soft));
  transition: transform var(--duration-slow) ease, box-shadow var(--duration-slow) ease, border-color var(--duration-slow) ease;
}

.card-project:hover,
.card-project:focus-within {
  transform: translateY(-8px);
  border-color: var(--color-border-strong);
  box-shadow: var(--shadow-card);
}

.project-card-index {
  margin: var(--space-0);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-project-index);
}

.card-project h3 {
  margin: 0.45rem 0 0.8rem;
  font-size: 1.35rem;
}

.project-stack-tags {
  list-style: none;
  margin: var(--space-0);
  padding: var(--space-0);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.project-tag {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  padding: 0.3rem 0.62rem;
  border-radius: var(--size-radius-pill);
  border: 1px solid transparent;
  opacity: 0.85;
  transform: translateY(6px) scale(0.97);
  transition: transform var(--duration-slow) ease, opacity var(--duration-slow) ease, box-shadow var(--duration-slow) ease;
}

.card-project:hover .project-tag,
.card-project:focus-within .project-tag {
  opacity: 1;
  transform: translateY(0) scale(1);
}

.card-project:hover .project-tag:nth-child(1),
.card-project:focus-within .project-tag:nth-child(1) { transition-delay: 0.02s; }
.card-project:hover .project-tag:nth-child(2),
.card-project:focus-within .project-tag:nth-child(2) { transition-delay: 0.08s; }
.card-project:hover .project-tag:nth-child(3),
.card-project:focus-within .project-tag:nth-child(3) { transition-delay: 0.14s; }

.project-tag-csharp { color: var(--color-tag-csharp-text); background: var(--color-tag-csharp-bg); border-color: var(--color-tag-csharp-border); }
.project-tag-mssql { color: var(--color-tag-mssql-text); background: var(--color-tag-mssql-bg); border-color: var(--color-tag-mssql-border); }
.project-tag-edi { color: var(--color-tag-edi-text); background: var(--color-tag-edi-bg); border-color: var(--color-tag-edi-border); }
.project-tag-dotnet { color: var(--color-tag-dotnet-text); background: var(--color-tag-dotnet-bg); border-color: var(--color-tag-dotnet-border); }
.project-tag-reporting { color: var(--color-tag-reporting-text); background: var(--color-tag-reporting-bg); border-color: var(--color-tag-reporting-border); }

.project-card-desc {
  margin: 0.9rem var(--space-0) var(--space-4);
  color: var(--color-project-desc);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  min-height: 3em;
}

.project-card-links {
  display: flex;
  gap: var(--space-4);
  margin-top: auto;
}

.project-card-links a {
  color: var(--color-link);
  text-decoration: none;
  font-weight: 600;
}

.project-card-links a:hover,
.project-card-links a:focus-visible {
  text-decoration: underline;
  text-underline-offset: 0.18em;
}

/* Skills */
.section-skills {
  padding-top: var(--space-10);
}

.grid-skills {
  list-style: none;
  margin: var(--space-0);
  padding: var(--space-0);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(var(--size-skill-card-min), 1fr));
  gap: var(--space-17);
}

.card-skill {
  border: 1px solid var(--color-border);
  border-radius: var(--space-17);
  padding: var(--space-4) var(--space-15);
  min-height: var(--size-skill-card-min-h);
  display: grid;
  place-items: center;
  gap: var(--space-2);
  text-align: center;
  background: linear-gradient(165deg, var(--color-bg-panel-strong), var(--color-bg-panel-soft));
  transition: transform var(--duration-slow) ease, box-shadow var(--duration-slow) ease, border-color var(--duration-slow) ease;
}

.card-skill i {
  font-size: 2rem;
  line-height: 1;
}

.card-skill span {
  font-size: 0.9rem;
  color: var(--color-text-soft);
  font-weight: 600;
}

.card-skill:hover,
.card-skill:focus-within {
  transform: translateY(-6px) scale(1.02);
  border-color: var(--color-glow-border);
  box-shadow: var(--shadow-glow-skill);
}

/* About */
.about-layout {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: var(--space-7);
  align-items: center;
}

.about-copy p {
  margin: var(--space-0);
  color: var(--color-text-body);
}

.about-copy p + p {
  margin-top: var(--space-19);
}

.about-visual-art {
  position: relative;
  min-height: var(--size-about-visual-min);
  border: 1px solid var(--color-border);
  border-radius: var(--size-radius-lg);
  background: radial-gradient(circle at 20% 15%, var(--color-about-radial), transparent 50%), linear-gradient(140deg, var(--color-bg-panel), var(--color-bg-panel-soft));
  overflow: hidden;
}

.shape-orb,
.shape-ring {
  position: absolute;
  pointer-events: none;
}

.shape-orb {
  border-radius: 50%;
  filter: blur(0.4px);
  animation: orbDrift 11s ease-in-out infinite;
}

.shape-orb-one {
  width: var(--size-shape-1);
  height: var(--size-shape-1);
  top: 16%;
  left: 14%;
  background: radial-gradient(circle at 30% 30%, var(--color-about-shape-a0), var(--color-about-shape-a1));
}

.shape-orb-two {
  width: var(--size-shape-2);
  height: var(--size-shape-2);
  top: 56%;
  left: 54%;
  background: radial-gradient(circle at 30% 30%, var(--color-about-shape-b0), var(--color-about-shape-b1));
  animation-delay: -2.7s;
}

.shape-orb-three {
  width: var(--size-shape-3);
  height: var(--size-shape-3);
  top: 30%;
  left: 70%;
  background: radial-gradient(circle at 30% 30%, var(--color-about-shape-c0), var(--color-about-shape-c1));
  animation-delay: -4.4s;
}

.shape-ring {
  border: 1px solid var(--color-about-ring);
  border-radius: 50%;
  animation: ringSpin 18s linear infinite;
}

.shape-ring-one {
  width: var(--size-ring-1);
  height: var(--size-ring-1);
  top: -50px;
  right: -44px;
}

.shape-ring-two {
  width: var(--size-ring-2);
  height: var(--size-ring-2);
  bottom: -28px;
  left: -30px;
  animation-direction: reverse;
}

.shape-grid-cut {
  position: absolute;
  inset: var(--space-0);
  background-image: linear-gradient(var(--color-grid-cut) 1px, transparent 1px), linear-gradient(90deg, var(--color-grid-cut) 1px, transparent 1px);
  background-size: var(--size-grid-about) var(--size-grid-about);
  opacity: 0.26;
  mask-image: radial-gradient(circle at 50% 50%, #000 20%, transparent 75%);
}

/* Contact */
.contact-layout {
  display: grid;
  gap: var(--space-22);
}

.contact-cta {
  margin: var(--space-0);
  color: var(--color-contact-cta);
  font-size: var(--space-20);
}

.form-contact {
  display: grid;
  gap: var(--space-13);
  max-width: 720px;
}

.form-contact label {
  color: var(--color-contact-label);
  font-size: 0.92rem;
}

.form-contact input,
.form-contact textarea {
  width: 100%;
  border: 1px solid var(--color-contact-field-border);
  border-radius: var(--space-14);
  background: var(--color-bg-panel);
  color: var(--color-text);
  padding: var(--space-3) var(--space-15);
  font: inherit;
}

.form-contact input:focus,
.form-contact textarea:focus {
  outline: none;
  border-color: var(--color-contact-field-focus);
  box-shadow: 0 0 0 3px var(--color-focus);
}

.form-contact textarea {
  resize: vertical;
  min-height: var(--size-skill-card-min-h);
}

.form-contact .button {
  justify-self: start;
  margin-top: var(--space-12);
  border: 0;
  cursor: pointer;
}

.contact-icon-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.button-icon {
  min-width: var(--size-skill-card-min);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  text-decoration: none;
  border: 1px solid var(--color-contact-field-border);
  border-radius: var(--space-16);
  padding: var(--space-15) var(--space-4);
  color: var(--color-icon-text);
  background: var(--color-bg-panel);
  transition: transform var(--duration-fast) ease, border-color var(--duration-fast) ease, box-shadow var(--duration-base) ease;
}

.button-icon i,
.button-icon svg {
  width: var(--size-icon);
  height: var(--size-icon);
  font-size: var(--size-icon);
  fill: currentColor;
}

.button-icon span {
  font-weight: 700;
}

.button-icon:hover,
.button-icon:focus-visible {
  transform: translateY(-3px);
}

.button-icon-github:hover,
.button-icon-github:focus-visible {
  border-color: var(--color-icon-github-border);
  box-shadow: var(--shadow-icon-hover) var(--color-icon-github-shadow);
}

.button-icon-linkedin:hover,
.button-icon-linkedin:focus-visible {
  border-color: var(--color-icon-linkedin-border);
  box-shadow: var(--shadow-icon-hover) var(--color-icon-linkedin-shadow);
}

.button-icon-email:hover,
.button-icon-email:focus-visible {
  border-color: var(--color-icon-email-border);
  box-shadow: var(--shadow-icon-hover) var(--color-icon-email-shadow);
}

/* Keyframes */
@keyframes gradientShift {
  0% { transform: translate3d(-2%, -1%, 0); background-position: 0% 50%; }
  50% { transform: translate3d(2%, 2%, 0); background-position: 100% 50%; }
  100% { transform: translate3d(-2%, -1%, 0); background-position: 0% 50%; }
}

@keyframes floatUp {
  0% { transform: translateY(0) scale(0.8); opacity: 0; }
  12% { opacity: 0.28; }
  88% { opacity: 0.28; }
  100% { transform: translateY(-105vh) scale(1.1); opacity: 0; }
}

@keyframes caretBlink {
  0%, 45% { border-right-color: var(--color-caret); }
  46%, 100% { border-right-color: transparent; }
}

@keyframes orbDrift {
  0%, 100% { transform: translate3d(0, 0, 0); }
  50% { transform: translate3d(10px, -8px, 0); }
}

@keyframes ringSpin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* Responsive */
@media (min-width: 640px) and (max-width: 1024px) {
  html,
  body {
    overflow-x: hidden;
  }

  .layout-container {
    width: min(var(--size-container-max), calc(100vw - (var(--space-4) * 2)));
  }

  .navbar-inner {
    min-height: 62px;
  }

  .navbar-menu {
    gap: var(--space-4);
  }

  .navbar-menu a {
    font-size: 0.95rem;
  }

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

  .grid-projects,
  .grid-skills,
  .contact-icon-row,
  .about-layout {
    min-width: 0;
  }

  .contact-icon-row {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .button-icon {
    min-width: 0;
    width: 100%;
  }
}

@media (max-width: 639px) {
  html,
  body {
    overflow-x: hidden;
  }

  .layout-container {
    width: min(var(--size-container-max), calc(100vw - (var(--space-4) * 2)));
  }

  .section-hero {
    min-height: 92vh;
  }

  #hero-title {
    font-size: clamp(2.1rem, 11vw, 3.2rem);
  }

  .hero-tagline {
    font-size: clamp(0.95rem, 4.2vw, 1.1rem);
  }

  .hero-typing-line {
    font-size: clamp(0.9rem, 4vw, 1.05rem);
  }

  .about-layout {
    grid-template-columns: 1fr;
  }

  .about-visual-art {
    min-height: var(--size-about-visual-min-mobile);
  }

  .grid-projects,
  .grid-skills,
  .contact-icon-row {
    grid-template-columns: 1fr;
  }

  .grid-projects,
  .grid-skills,
  .contact-icon-row,
  .about-layout {
    min-width: 0;
  }

  .navbar-toggle {
    display: inline-flex;
    flex-direction: column;
    justify-content: center;
    gap: var(--space-1);
    width: var(--size-toggle);
    height: var(--size-toggle);
    border: 0;
    background: transparent;
    padding: 0;
    cursor: pointer;
  }

  .navbar-toggle span {
    display: block;
    width: var(--size-toggle-line-w);
    height: var(--size-toggle-line-h);
    margin-inline: auto;
    background: var(--color-text);
  }

  .navbar-menu {
    position: absolute;
    top: calc(100% + 8px);
    left: var(--space-4);
    right: var(--space-4);
    display: none;
    flex-direction: column;
    padding: var(--space-15) var(--space-4);
    border: 1px solid var(--color-border);
    border-radius: var(--size-radius-md);
    background: var(--color-navbar-mobile-bg);
  }

  .navbar-menu.is-open {
    display: flex;
  }

  .contact-icon-row {
    display: grid;
  }

  .button-icon {
    min-width: 0;
    width: 100%;
  }
}

@media (hover: none), (pointer: coarse) {
  a,
  button,
  .button,
  .button-icon,
  .navbar-toggle,
  .navbar-menu a,
  .project-card-links a {
    min-height: 44px;
  }
}

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

  *,
  *::before,
  *::after {
    animation: none !important;
    transition-duration: 0.01ms !important;
  }

  [data-animate] {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
}