:root {
  --bg: #e8eef2;
  --bg-deep: #d3dde6;
  --bg-top: #f3f7f9;
  --ink: #10212b;
  --ink-soft: #3d5260;
  --muted: #6a7f8c;
  --line: rgba(16, 33, 43, 0.12);
  --accent: #0f8f72;
  --accent-deep: #0a6b55;
  --surface: rgba(255, 255, 255, 0.55);
  --surface-strong: rgba(255, 255, 255, 0.78);
  --surface-soft: rgba(255, 255, 255, 0.35);
  --header-bg: rgba(232, 238, 242, 0.72);
  --header-bg-scrolled: rgba(243, 247, 249, 0.88);
  --btn-fg: #f4f8fa;
  --ghost-hover: rgba(255, 255, 255, 0.55);
  --lang-bg: rgba(255, 255, 255, 0.45);
  --orb-a: rgba(15, 143, 114, 0.18);
  --orb-b: rgba(53, 98, 140, 0.16);
  --grid-line: rgba(16, 33, 43, 0.045);
  --link-underline: rgba(16, 33, 43, 0.28);
  --shadow: 0 30px 80px rgba(16, 33, 43, 0.12);
  --grain-opacity: 0.035;
  --font-display: "Instrument Serif", Georgia, serif;
  --font-body: "Manrope", "Segoe UI", sans-serif;
  --max: 1120px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  color-scheme: light;
}

html[data-theme="dark"] {
  --bg: #0d161c;
  --bg-deep: #081015;
  --bg-top: #121e26;
  --ink: #e8f0f4;
  --ink-soft: #a7b8c3;
  --muted: #7d919e;
  --line: rgba(232, 240, 244, 0.12);
  --accent: #2ec49a;
  --accent-deep: #57d6b0;
  --surface: rgba(255, 255, 255, 0.04);
  --surface-strong: rgba(255, 255, 255, 0.08);
  --surface-soft: rgba(255, 255, 255, 0.05);
  --header-bg: rgba(13, 22, 28, 0.72);
  --header-bg-scrolled: rgba(8, 16, 21, 0.88);
  --btn-fg: #071018;
  --ghost-hover: rgba(255, 255, 255, 0.06);
  --lang-bg: rgba(255, 255, 255, 0.05);
  --orb-a: rgba(46, 196, 154, 0.18);
  --orb-b: rgba(84, 130, 176, 0.16);
  --grid-line: rgba(232, 240, 244, 0.05);
  --link-underline: rgba(232, 240, 244, 0.28);
  --shadow: 0 30px 80px rgba(0, 0, 0, 0.35);
  --grain-opacity: 0.05;
  color-scheme: dark;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-body);
  color: var(--ink);
  background:
    radial-gradient(1200px 700px at 80% -10%, var(--orb-a), transparent 55%),
    radial-gradient(900px 600px at -5% 20%, var(--orb-b), transparent 50%),
    linear-gradient(165deg, var(--bg-top) 0%, var(--bg) 45%, var(--bg-deep) 100%);
  line-height: 1.55;
  overflow-x: hidden;
  transition: background 0.35s ease, color 0.25s ease;
}

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

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

button {
  font: inherit;
  border: 0;
  background: none;
  cursor: pointer;
  color: inherit;
}

ul,
ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

.grain {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 50;
  opacity: var(--grain-opacity);
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* Header */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem clamp(1.25rem, 4vw, 2.5rem);
  backdrop-filter: blur(14px);
  background: var(--header-bg);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s ease, background 0.3s ease;
}

.site-header.is-scrolled {
  border-bottom-color: var(--line);
  background: var(--header-bg-scrolled);
}

.logo {
  font-family: var(--font-display);
  font-size: 1.35rem;
  letter-spacing: -0.02em;
}

.nav {
  display: none;
  gap: 1.5rem;
}

.nav a {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--ink-soft);
  transition: color 0.2s ease;
}

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

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.theme-toggle {
  width: 2.35rem;
  height: 2.35rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--lang-bg);
  color: var(--ink-soft);
  transition: color 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

.theme-toggle:hover {
  color: var(--ink);
  background: var(--ghost-hover);
}

.theme-icon {
  display: none;
  line-height: 0;
}

html:not([data-theme="light"]) .theme-icon--sun,
html[data-theme="light"] .theme-icon--moon {
  display: block;
}

.lang-switch {
  display: inline-flex;
  padding: 0.2rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--lang-bg);
}

.lang-btn {
  min-width: 2.2rem;
  padding: 0.35rem 0.55rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--muted);
}

.lang-btn.is-active {
  background: var(--ink);
  color: var(--btn-fg);
}

/* Buttons */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.9rem;
  padding: 0.7rem 1.35rem;
  border-radius: 999px;
  background: var(--ink);
  color: var(--btn-fg);
  font-size: 0.95rem;
  font-weight: 600;
  transition: transform 0.25s var(--ease), background 0.2s ease, color 0.2s ease;
}

.btn:hover {
  background: var(--accent-deep);
  color: var(--btn-fg);
  transform: translateY(-1px);
}

html[data-theme="dark"] .btn:hover {
  color: #071018;
}

.btn-ghost {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--line);
}

.btn-ghost:hover {
  background: var(--ghost-hover);
  color: var(--ink);
  transform: translateY(-1px);
}

html[data-theme="dark"] .btn-ghost:hover {
  color: var(--ink);
}

.btn-small {
  min-height: 2.35rem;
  padding: 0.45rem 0.95rem;
  font-size: 0.85rem;
}

.header-actions .btn-small {
  display: none;
}

/* Hero */

.hero {
  position: relative;
  min-height: 100svh;
  display: grid;
  align-items: end;
  padding:
    calc(5.5rem + env(safe-area-inset-top))
    clamp(1.25rem, 4vw, 2.5rem)
    clamp(2.5rem, 6vh, 4rem);
  overflow: clip;
}

.hero-atmosphere {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(20px);
  animation: float 10s var(--ease) infinite alternate;
}

.hero-orb--a {
  width: min(48vw, 420px);
  height: min(48vw, 420px);
  top: 12%;
  right: 8%;
  background: radial-gradient(circle, rgba(15, 143, 114, 0.35), transparent 70%);
}

html[data-theme="dark"] .hero-orb--a {
  background: radial-gradient(circle, rgba(46, 196, 154, 0.28), transparent 70%);
}

.hero-orb--b {
  width: min(38vw, 320px);
  height: min(38vw, 320px);
  top: 42%;
  right: 28%;
  background: radial-gradient(circle, rgba(53, 98, 140, 0.28), transparent 70%);
  animation-delay: -3s;
}

html[data-theme="dark"] .hero-orb--b {
  background: radial-gradient(circle, rgba(84, 130, 176, 0.22), transparent 70%);
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: radial-gradient(ellipse 70% 60% at 70% 40%, black, transparent 75%);
}

.hero-device {
  position: absolute;
  right: clamp(4%, 8vw, 12%);
  top: 50%;
  transform: translateY(-42%) rotate(-8deg);
  width: min(280px, 38vw);
  animation: deviceIn 1.1s var(--ease) both;
}

.device-bezel {
  aspect-ratio: 9 / 18.5;
  border-radius: 2rem;
  padding: 0.55rem;
  background: linear-gradient(160deg, #1a303c, #0d1a22);
  box-shadow: var(--shadow), inset 0 0 0 1px rgba(255, 255, 255, 0.08);
}

.device-notch {
  width: 34%;
  height: 1.1rem;
  margin: 0.2rem auto 0.7rem;
  border-radius: 999px;
  background: #0a141a;
}

.device-screen {
  height: calc(100% - 2rem);
  border-radius: 1.45rem;
  padding: 1.2rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
  background:
    linear-gradient(165deg, rgba(15, 143, 114, 0.22), transparent 40%),
    linear-gradient(180deg, #16303c, #10242e);
}

.device-line,
.device-block {
  display: block;
  border-radius: 999px;
  background: rgba(244, 248, 250, 0.78);
}

.device-line {
  width: 72%;
  height: 0.55rem;
  animation: pulse 2.8s ease-in-out infinite;
}

.device-line.short {
  width: 48%;
  opacity: 0.55;
  animation-delay: 0.4s;
}

.device-block {
  margin-top: 0.5rem;
  width: 100%;
  height: 5.5rem;
  border-radius: 1rem;
  background: linear-gradient(135deg, rgba(15, 143, 114, 0.55), rgba(53, 98, 140, 0.4));
}

.device-chip {
  align-self: flex-start;
  margin-top: auto;
  padding: 0.35rem 0.7rem;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: #e8fff8;
  background: rgba(15, 143, 114, 0.45);
  border: 1px solid rgba(232, 255, 248, 0.18);
}

.device-chip.muted {
  background: rgba(244, 248, 250, 0.08);
  color: rgba(244, 248, 250, 0.7);
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 36rem;
}

.hero-brand {
  margin: 0 0 0.85rem;
  font-family: var(--font-display);
  font-size: clamp(3.2rem, 10vw, 5.6rem);
  line-height: 0.92;
  letter-spacing: -0.03em;
}

.hero-title {
  margin: 0;
  max-width: 18ch;
  font-family: var(--font-body);
  font-size: clamp(1.25rem, 2.8vw, 1.7rem);
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.hero-lead {
  margin: 1rem 0 0;
  max-width: 34ch;
  color: var(--ink-soft);
  font-size: 1rem;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.75rem;
}

/* Sections */

.section {
  padding: clamp(4.5rem, 10vh, 7rem) clamp(1.25rem, 4vw, 2.5rem);
}

.section-inner {
  width: min(100%, var(--max));
  margin: 0 auto;
}

.section-inner.narrow {
  max-width: 720px;
}

.section-kicker {
  margin: 0 0 0.75rem;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-deep);
}

.section-title {
  margin: 0;
  max-width: 18ch;
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  line-height: 1.05;
  letter-spacing: -0.02em;
  font-weight: 400;
}

.section-copy {
  margin: 1.25rem 0 0;
  max-width: 52ch;
  color: var(--ink-soft);
  font-size: 1.05rem;
}

.section-about {
  border-top: 1px solid var(--line);
}

/* Projects */

.project-list {
  margin-top: 2.75rem;
  display: grid;
  gap: 0;
}

.project-item {
  padding: 1.6rem 0;
  border-top: 1px solid var(--line);
}

.project-item:last-child {
  border-bottom: 1px solid var(--line);
}

.project-meta {
  margin-bottom: 0.4rem;
}

.project-role {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-deep);
}

.project-name {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 3.2vw, 2.25rem);
  font-weight: 400;
  letter-spacing: -0.02em;
}

.project-name a {
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
  text-decoration-color: var(--link-underline);
  transition: text-decoration-color 0.2s ease, color 0.2s ease;
}

.project-name a:hover {
  color: var(--accent-deep);
  text-decoration-color: var(--accent);
}

.project-copy {
  margin: 0.65rem 0 0;
  max-width: 58ch;
  color: var(--ink-soft);
}

@media (min-width: 760px) {
  .project-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 2.5rem;
  }

  .project-item:last-child {
    border-bottom: 0;
  }

  .project-item:nth-last-child(-n + 2) {
    border-bottom: 1px solid var(--line);
  }
}

/* Experience */

.experience-list {
  margin-top: 2.75rem;
  display: grid;
  gap: 0;
}

.experience-item {
  padding: 1.75rem 0;
  border-top: 1px solid var(--line);
}

.experience-item:last-child {
  border-bottom: 1px solid var(--line);
}

.experience-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1rem;
  align-items: center;
  margin-bottom: 0.45rem;
}

.experience-role {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--accent-deep);
}

.experience-time {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--muted);
}

.experience-company {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3.5vw, 2.4rem);
  font-weight: 400;
  letter-spacing: -0.02em;
}

.experience-copy {
  margin: 0.7rem 0 0;
  max-width: 68ch;
  color: var(--ink-soft);
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-top: 1rem;
}

.tag-row li {
  padding: 0.35rem 0.7rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--ink-soft);
  background: var(--surface-soft);
}

/* Work */

.work-list {
  margin-top: 2.5rem;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: 1.25rem;
  overflow: hidden;
}

.work-item {
  display: block;
  padding: 1.5rem 1.35rem;
  background: var(--surface);
  transition: background 0.25s ease, transform 0.25s var(--ease);
}

.work-item:hover {
  background: var(--surface-strong);
}

.work-top {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.5rem 1rem;
  align-items: baseline;
}

.work-top h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.7rem;
  font-weight: 400;
  letter-spacing: -0.02em;
}

.work-meta {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--muted);
}

.work-item p {
  margin: 0.55rem 0 0;
  color: var(--ink-soft);
}

/* Stack */

.stack-grid {
  margin-top: 2.25rem;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.65rem;
}

.stack-grid li {
  padding: 1rem 1.1rem;
  border-top: 1px solid var(--line);
  font-weight: 600;
  letter-spacing: -0.01em;
}

/* Contact */

.section-contact {
  padding-bottom: clamp(5rem, 12vh, 8rem);
}

.section-contact .section-title {
  max-width: 12ch;
}

/* Footer */

.site-footer {
  padding: 1.5rem clamp(1.25rem, 4vw, 2.5rem) 2rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.9rem;
}

.footer-sep {
  margin: 0 0.4rem;
}

/* Motion */

.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.75s var(--ease), transform 0.75s var(--ease);
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

@keyframes float {
  from {
    transform: translateY(0) scale(1);
  }
  to {
    transform: translateY(-18px) scale(1.04);
  }
}

@keyframes deviceIn {
  from {
    opacity: 0;
    transform: translateY(-35%) rotate(-14deg) scale(0.94);
  }
  to {
    opacity: 1;
    transform: translateY(-42%) rotate(-8deg) scale(1);
  }
}

@keyframes pulse {
  0%,
  100% {
    opacity: 0.75;
  }
  50% {
    opacity: 1;
  }
}

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

  .reveal,
  .hero-orb,
  .hero-device,
  .device-line,
  .btn {
    animation: none !important;
    transition: none !important;
    opacity: 1 !important;
    transform: none !important;
  }
}

/* Breakpoints */

@media (min-width: 760px) {
  .nav {
    display: flex;
  }

  .header-actions .btn-small {
    display: inline-flex;
  }

  .work-list {
    grid-template-columns: repeat(3, 1fr);
  }

  .work-item {
    min-height: 100%;
  }

  .stack-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 960px) {
  .hero {
    align-items: center;
    padding-bottom: 0;
  }

  .hero-content {
    max-width: 40rem;
  }

  .hero-device {
    width: min(300px, 26vw);
    right: 10%;
  }
}

@media (max-width: 720px) {
  .hero-device {
    opacity: 0.28;
    width: min(220px, 52vw);
    right: -6%;
    top: 28%;
    transform: translateY(0) rotate(-10deg);
    animation: none;
  }
}