/* Inter — sans-serif body font */
@font-face {
  font-family: "Inter";
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url(fonts/Inter-cyrillic-ext.woff2) format("woff2");
  unicode-range:
    U+0460-052F, U+1C80-1C8A, U+20B4, U+2DE0-2DFF, U+A640-A69F, U+FE2E-FE2F;
}
@font-face {
  font-family: "Inter";
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url(fonts/Inter-cyrillic.woff2) format("woff2");
  unicode-range: U+0301, U+0400-045F, U+0490-0491, U+04B0-04B1, U+2116;
}
@font-face {
  font-family: "Inter";
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url(fonts/Inter-greek-ext.woff2) format("woff2");
  unicode-range: U+1F00-1FFF;
}
@font-face {
  font-family: "Inter";
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url(fonts/Inter-greek.woff2) format("woff2");
  unicode-range:
    U+0370-0377, U+037A-037F, U+0384-038A, U+038C, U+038E-03A1, U+03A3-03FF;
}
@font-face {
  font-family: "Inter";
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url(fonts/Inter-vietnamese.woff2) format("woff2");
  unicode-range:
    U+0102-0103, U+0110-0111, U+0128-0129, U+0168-0169, U+01A0-01A1,
    U+01AF-01B0, U+0300-0301, U+0303-0304, U+0308-0309, U+0323, U+0329,
    U+1EA0-1EF9, U+20AB;
}
@font-face {
  font-family: "Inter";
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url(fonts/Inter-latin-ext.woff2) format("woff2");
  unicode-range:
    U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304,
    U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB,
    U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
@font-face {
  font-family: "Inter";
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url(fonts/Inter-latin.woff2) format("woff2");
  unicode-range:
    U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC,
    U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212,
    U+2215, U+FEFF, U+FFFD;
}

/* Fraunces — display/heading font */
@font-face {
  font-family: "Fraunces";
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url(fonts/Fraunces-normal-vietnamese.woff2) format("woff2");
  unicode-range:
    U+0102-0103, U+0110-0111, U+0128-0129, U+0168-0169, U+01A0-01A1,
    U+01AF-01B0, U+0300-0301, U+0303-0304, U+0308-0309, U+0323, U+0329,
    U+1EA0-1EF9, U+20AB;
}
@font-face {
  font-family: "Fraunces";
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url(fonts/Fraunces-normal-latin-ext.woff2) format("woff2");
  unicode-range:
    U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304,
    U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB,
    U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
@font-face {
  font-family: "Fraunces";
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url(fonts/Fraunces-normal-latin.woff2) format("woff2");
  unicode-range:
    U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC,
    U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212,
    U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: "Fraunces";
  font-style: italic;
  font-weight: 100 900;
  font-display: swap;
  src: url(fonts/Fraunces-italic-vietnamese.woff2) format("woff2");
  unicode-range:
    U+0102-0103, U+0110-0111, U+0128-0129, U+0168-0169, U+01A0-01A1,
    U+01AF-01B0, U+0300-0301, U+0303-0304, U+0308-0309, U+0323, U+0329,
    U+1EA0-1EF9, U+20AB;
}
@font-face {
  font-family: "Fraunces";
  font-style: italic;
  font-weight: 100 900;
  font-display: swap;
  src: url(fonts/Fraunces-italic-latin-ext.woff2) format("woff2");
  unicode-range:
    U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304,
    U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB,
    U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
@font-face {
  font-family: "Fraunces";
  font-style: italic;
  font-weight: 100 900;
  font-display: swap;
  src: url(fonts/Fraunces-italic-latin.woff2) format("woff2");
  unicode-range:
    U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC,
    U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212,
    U+2215, U+FEFF, U+FFFD;
}

/* JetBrains Mono — monospace font */
@font-face {
  font-family: "JetBrains Mono";
  font-style: normal;
  font-weight: 100 800;
  font-display: swap;
  src: url(fonts/JetBrainsMono-cyrillic-ext.woff2) format("woff2");
  unicode-range:
    U+0460-052F, U+1C80-1C8A, U+20B4, U+2DE0-2DFF, U+A640-A69F, U+FE2E-FE2F;
}
@font-face {
  font-family: "JetBrains Mono";
  font-style: normal;
  font-weight: 100 800;
  font-display: swap;
  src: url(fonts/JetBrainsMono-cyrillic.woff2) format("woff2");
  unicode-range: U+0301, U+0400-045F, U+0490-0491, U+04B0-04B1, U+2116;
}
@font-face {
  font-family: "JetBrains Mono";
  font-style: normal;
  font-weight: 100 800;
  font-display: swap;
  src: url(fonts/JetBrainsMono-greek.woff2) format("woff2");
  unicode-range:
    U+0370-0377, U+037A-037F, U+0384-038A, U+038C, U+038E-03A1, U+03A3-03FF;
}
@font-face {
  font-family: "JetBrains Mono";
  font-style: normal;
  font-weight: 100 800;
  font-display: swap;
  src: url(fonts/JetBrainsMono-vietnamese.woff2) format("woff2");
  unicode-range:
    U+0102-0103, U+0110-0111, U+0128-0129, U+0168-0169, U+01A0-01A1,
    U+01AF-01B0, U+0300-0301, U+0303-0304, U+0308-0309, U+0323, U+0329,
    U+1EA0-1EF9, U+20AB;
}
@font-face {
  font-family: "JetBrains Mono";
  font-style: normal;
  font-weight: 100 800;
  font-display: swap;
  src: url(fonts/JetBrainsMono-latin-ext.woff2) format("woff2");
  unicode-range:
    U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304,
    U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB,
    U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
@font-face {
  font-family: "JetBrains Mono";
  font-style: normal;
  font-weight: 100 800;
  font-display: swap;
  src: url(fonts/JetBrainsMono-latin.woff2) format("woff2");
  unicode-range:
    U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC,
    U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212,
    U+2215, U+FEFF, U+FFFD;
}

/* ===== Design Tokens ===== */

/* Catppuccin rainbow accent colors */
:root {
  --ctp-rosewater: #dc8a78;
  --ctp-flamingo: #dd7878;
  --ctp-pink: #ea76cb;
  --ctp-mauve: #8839ef;
  --ctp-red: #d20f39;
  --ctp-peach: #fe640b;
  --ctp-yellow: #df8e1d;
  --ctp-green: #40a02b;
  --ctp-teal: #179299;
  --ctp-blue: #1e66f5;
  --ctp-lavender: #7287fd;

  /* Light theme (Catppuccin Latte) */
  --bg: #eff1f5;
  --bg-mantle: #e6e9ef;
  --bg-crust: #dce0e8;
  --surface-0: #ccd0da;
  --surface-1: #bcc0cc;
  --surface-2: #acb0be;
  --text: #4c4f69;
  --subtext-1: #5c5f77;
  --subtext-0: #6c6f85;
  --overlay-2: #7c7f93;
  --overlay-1: #8c8fa1;
  --overlay-0: #9ca0b0;

  --font-display: "Fraunces", Georgia, serif;
  --font-mono: "JetBrains Mono", monospace;
  --font-body: "Inter", system-ui, sans-serif;

  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --ctp-rosewater: #f5e0dc;
    --ctp-flamingo: #f2cdcd;
    --ctp-pink: #f5c2e7;
    --ctp-mauve: #cba6f7;
    --ctp-red: #f38ba8;
    --ctp-peach: #fab387;
    --ctp-yellow: #f9e2af;
    --ctp-green: #a6e3a1;
    --ctp-teal: #94e2d5;
    --ctp-blue: #89b4fa;
    --ctp-lavender: #b4befe;

    --bg: #1e1e2e;
    --bg-mantle: #181825;
    --bg-crust: #11111b;
    --surface-0: #313244;
    --surface-1: #45475a;
    --surface-2: #585b70;
    --text: #cdd6f4;
    --subtext-1: #bac2de;
    --subtext-0: #a6adc8;
    --overlay-2: #9399b2;
    --overlay-1: #7f849c;
    --overlay-0: #6c7086;

    color-scheme: dark;
  }
}

/* ===== Reset ===== */

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text);
  background-color: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: var(--ctp-mauve);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--ctp-lavender);
}

h1,
h2,
h3,
h4,
h5,
h6 {
  line-height: 1.2;
  color: var(--text);
}

ul,
ol {
  list-style: none;
}

/* ===== Layout ===== */

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

section {
  padding: 6rem 0;
}

/* ===== Navigation ===== */

#site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg);
  transition:
    background 0.3s ease,
    box-shadow 0.3s ease,
    backdrop-filter 0.3s ease;
}

#site-header.scrolled {
  background: color-mix(in srgb, var(--bg) 80%, transparent);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 1px 0 var(--surface-0);
}

#site-header nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 1rem;
  padding-bottom: 1rem;
}

.nav-name {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 700;
  text-decoration: none;
  letter-spacing: -0.02em;
}

/* Animated gradient text */
.gradient-text {
  background: linear-gradient(
    135deg,
    var(--ctp-mauve),
    var(--ctp-blue),
    var(--ctp-teal),
    var(--ctp-mauve)
  );
  background-size: 300% 300%;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: gradientShift 8s ease infinite;
}

@keyframes gradientShift {
  0%,
  100% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
}

.nav-links {
  display: flex;
  gap: 2rem;
}

.nav-links a {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--subtext-0);
  text-decoration: none;
  position: relative;
}

.nav-links a::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--ctp-mauve);
  transition: width 0.3s ease;
}

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

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

.nav-links a.active {
  color: var(--text);
}

/* ===== Hero ===== */

.hero {
  min-height: 85vh;
  display: flex;
  align-items: center;
  padding: 4rem 0;
}

.hero-name {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(3rem, 8vw, 6rem);
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin-bottom: 1.5rem;
  opacity: 0;
  animation: fadeUp 0.8s ease-out 0.2s forwards;
}

.hero-title {
  font-family: var(--font-mono);
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  font-weight: 400;
  color: var(--ctp-mauve);
  margin-bottom: 1rem;
  opacity: 0;
  animation: fadeUp 0.6s ease-out 0.8s forwards;
}

.hero-subtitle {
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  color: var(--subtext-0);
  max-width: 520px;
  margin-bottom: 2.5rem;
  opacity: 0;
  animation: fadeUp 0.6s ease-out 1s forwards;
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero-cta {
  display: flex;
  gap: 1rem;
  opacity: 0;
  animation: fadeUp 0.6s ease-out 1.2s forwards;
}

/* ===== Buttons ===== */

.btn {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 500;
  padding: 0.75rem 1.75rem;
  border-radius: 8px;
  transition: all 0.2s ease;
  cursor: pointer;
}

.btn-primary {
  background: var(--ctp-mauve);
  color: var(--bg);
}

.btn-primary:hover {
  background: var(--ctp-lavender);
  color: var(--bg);
  transform: translateY(-2px);
  box-shadow: 0 4px 16px color-mix(in srgb, var(--ctp-mauve) 30%, transparent);
}

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

.btn-ghost:hover {
  border-color: var(--ctp-mauve);
  color: var(--ctp-mauve);
  transform: translateY(-2px);
}

/* ===== About ===== */

#about h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2rem, 4vw, 3rem);
  margin-bottom: 3rem;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}

.about-text p {
  font-size: 1.1rem;
  color: var(--subtext-1);
  margin-bottom: 1.5rem;
  max-width: 540px;
}

.about-skills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-content: start;
}

.pill {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 500;
  padding: 0.4rem 0.85rem;
  background: var(--bg-mantle);
  color: var(--subtext-0);
  border-radius: 6px;
  border: 1px solid var(--surface-0);
  transition: all 0.2s ease;
}

.pill:hover {
  background: var(--surface-0);
  color: var(--text);
  transform: translateY(-1px);
}

.pill-sm {
  font-size: 0.7rem;
  padding: 0.25rem 0.6rem;
}

/* ===== Work / Portfolio ===== */

#work h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2rem, 4vw, 3rem);
  margin-bottom: 3rem;
}

.work-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  padding: 0 1.5rem;
}

.card {
  display: block;
  background: var(--bg-mantle);
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--surface-0);
  transition:
    transform 0.3s ease,
    box-shadow 0.3s ease,
    border-color 0.3s ease;
  text-decoration: none;
  color: var(--text);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px color-mix(in srgb, var(--bg-crust) 60%, transparent);
  border-color: var(--ctp-mauve);
  color: var(--text);
}

.card-image {
  overflow: hidden;
  aspect-ratio: 16 / 10;
  background: var(--surface-0);
}

.card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.card:hover .card-image img {
  transform: scale(1.04);
}

.card-body {
  padding: 1.25rem 1.5rem 1.5rem;
}

.card-body h3 {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.35rem;
}

.card-body > p {
  font-size: 0.9rem;
  color: var(--subtext-0);
  margin-bottom: 0.75rem;
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

/* ===== Footer ===== */

footer {
  padding: 6rem 0 4rem;
  border-top: 1px solid var(--surface-0);
}

footer h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2rem, 4vw, 3rem);
  margin-bottom: 2rem;
}

.footer-links {
  display: flex;
  gap: 2rem;
  margin-bottom: 3rem;
}

.footer-links a {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 500;
  color: var(--ctp-mauve);
  position: relative;
}

.footer-links a::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--ctp-mauve);
  transition: width 0.3s ease;
}

.footer-links a:hover::after {
  width: 100%;
}

.footer-note {
  font-size: 0.875rem;
  color: var(--overlay-0);
}

/* ===== Scroll Reveal ===== */

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

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

/* ===== Reduced Motion ===== */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }

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

/* ===== Responsive ===== */

@media (max-width: 1100px) {
  .work-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 768px) {
  .container {
    padding: 0 1.25rem;
  }

  section {
    padding: 4rem 0;
  }

  .hero {
    min-height: 70vh;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .work-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    padding: 0 1.25rem;
  }

  .hero-cta {
    flex-direction: column;
    align-items: flex-start;
  }

  .footer-links {
    flex-direction: column;
    gap: 1rem;
  }
}

/* ===== Focus States ===== */

:focus-visible {
  outline: 2px solid var(--ctp-mauve);
  outline-offset: 3px;
  border-radius: 4px;
}