/* ==========================================================================
   NOVA — personal site · liquid glass design system
   ========================================================================== */

/* ---------- tokens ---------- */
:root {
  --bg-0: #04050a;
  --bg-1: #080b14;
  --fg: #e9edf7;
  --fg-dim: #a6b0c6;
  --fg-mute: #6b7488;
  --line: rgba(255, 255, 255, 0.09);

  --accent: #7cc4ff;
  --accent-2: #b18cff;
  --accent-3: #5ef0d0;
  --accent-soft: rgba(124, 196, 255, 0.14);

  --glass-bg: linear-gradient(
    160deg,
    rgba(255, 255, 255, 0.095),
    rgba(255, 255, 255, 0.018) 46%,
    rgba(255, 255, 255, 0.06)
  );
  --glass-brd: rgba(255, 255, 255, 0.11);
  --glass-blur: blur(24px) saturate(175%) brightness(1.05);

  --r-sm: 12px;
  --r-md: 18px;
  --r-lg: 26px;
  --r-xl: 34px;

  --shell: 1140px;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);

  --noise: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)' opacity='0.42'/%3E%3C/svg%3E");

  --sans: "Inter", "Sora", -apple-system, BlinkMacSystemFont, "Segoe UI",
    "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --mono: "JetBrains Mono", "SFMono-Regular", Consolas, "Liberation Mono", Menlo,
    monospace;
}

/* ---------- reset ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}
body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg-0);
  color: var(--fg);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.65;
  letter-spacing: -0.006em;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  transition: background 0.5s var(--ease), color 0.4s var(--ease);
}
img,
svg {
  display: block;
  max-width: 100%;
}
a {
  color: inherit;
  text-decoration: none;
}
button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  cursor: pointer;
}
::selection {
  background: rgba(124, 196, 255, 0.28);
  color: #fff;
}

/* scrollbar */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.14);
  border-radius: 99px;
  border: 3px solid transparent;
  background-clip: padding-box;
}
::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.26);
  background-clip: padding-box;
}

/* ---------- background field ---------- */
.field {
  position: fixed;
  inset: 0;
  z-index: -1;
  overflow: hidden;
  pointer-events: none;
  background:
    radial-gradient(120% 80% at 50% -20%, #0b1330 0%, transparent 60%),
    linear-gradient(180deg, var(--bg-0), var(--bg-1) 60%, var(--bg-0));
}

.blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(70px);
  opacity: 0.55;
  will-change: transform;
}
.blob.b1 {
  width: 46vw;
  height: 46vw;
  left: -8vw;
  top: -10vw;
  background: radial-gradient(circle at 30% 30%, #2d7dff, #0b1d54 65%, transparent 72%);
  animation: drift1 26s var(--ease) infinite alternate;
}
.blob.b2 {
  width: 40vw;
  height: 40vw;
  right: -6vw;
  top: 4vw;
  background: radial-gradient(circle at 60% 40%, #8a4dff, #2a1150 62%, transparent 72%);
  animation: drift2 32s var(--ease) infinite alternate;
  opacity: 0.45;
}
.blob.b3 {
  width: 34vw;
  height: 34vw;
  left: 26vw;
  bottom: -14vw;
  background: radial-gradient(circle at 50% 50%, #12e0bf, #073b36 60%, transparent 72%);
  animation: drift3 30s var(--ease) infinite alternate;
  opacity: 0.3;
}

@keyframes drift1 {
  to {
    transform: translate3d(9vw, 7vh, 0) scale(1.15);
  }
}
@keyframes drift2 {
  to {
    transform: translate3d(-8vw, 12vh, 0) scale(0.9);
  }
}
@keyframes drift3 {
  to {
    transform: translate3d(6vw, -9vh, 0) scale(1.2);
  }
}

/* fine grid + vignette + grain */
.field::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(100% 70% at 50% 0%, #000 0%, transparent 78%);
  -webkit-mask-image: radial-gradient(100% 70% at 50% 0%, #000 0%, transparent 78%);
  opacity: 0.7;
}
.grain {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.28;
  mix-blend-mode: overlay;
  background-image: var(--noise);
  background-size: 160px;
}

/* ---------- glass primitives ---------- */
.glass {
  position: relative;
  isolation: isolate;
  background: var(--glass-bg);
  border: 1px solid var(--glass-brd);
  -webkit-backdrop-filter: var(--glass-blur);
  backdrop-filter: var(--glass-blur);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.22),
    inset 0 -1px 0 rgba(255, 255, 255, 0.05),
    inset 1px 0 0 rgba(255, 255, 255, 0.06),
    inset -1px 0 0 rgba(255, 255, 255, 0.04),
    0 24px 60px -30px rgba(0, 0, 0, 0.9);
}
.glass::before {
  /* pointer specular */
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  pointer-events: none;
  background: radial-gradient(
    260px circle at var(--mx, 50%) var(--my, 0%),
    rgba(255, 255, 255, 0.16),
    transparent 62%
  );
  opacity: 0;
  transition: opacity 0.45s var(--ease);
  z-index: -1;
}
.glass:hover::before,
.glass.is-lit::before {
  opacity: 1;
}
.glass::after {
  /* grain + top-edge caustic */
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  pointer-events: none;
  background-image: var(--noise),
    linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.5), transparent);
  background-size: 160px, 70% 1px;
  background-position: 0 0, -120% 0;
  background-repeat: repeat, no-repeat;
  opacity: 0.22;
  mix-blend-mode: overlay;
  transition: background-position 0.9s var(--ease), opacity 0.5s;
}
.glass:hover::after {
  background-position: 0 0, 140% 0;
}

/* ---------- layout ---------- */
.shell {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: 24px;
}
section {
  position: relative;
  padding-block: 96px;
}
.sec-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 38px;
  flex-wrap: wrap;
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--fg-mute);
  margin-bottom: 14px;
}
.eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: linear-gradient(90deg, var(--accent), transparent);
}
h1,
h2,
h3,
h4 {
  margin: 0;
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.15;
}
h2.sec-title {
  font-size: clamp(1.7rem, 3.4vw, 2.5rem);
}
.sec-sub {
  color: var(--fg-dim);
  max-width: 46ch;
  margin: 12px 0 0;
  font-size: 0.97rem;
}
.muted {
  color: var(--fg-dim);
}
.dim {
  color: var(--fg-mute);
}

/* ---------- buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 12px 20px;
  border-radius: 999px;
  font-size: 0.92rem;
  font-weight: 500;
  letter-spacing: -0.01em;
  white-space: nowrap;
  transition: transform 0.35s var(--ease-out), box-shadow 0.35s var(--ease),
    background 0.35s var(--ease), border-color 0.35s;
  position: relative;
  overflow: hidden;
}
.btn:hover {
  transform: translateY(-2px);
}
.btn:active {
  transform: translateY(0) scale(0.985);
}
.btn-primary {
  color: #05121f;
  background: linear-gradient(135deg, #a8dcff, #7cc4ff 42%, #b18cff);
  box-shadow: 0 10px 30px -12px rgba(124, 196, 255, 0.7),
    inset 0 1px 0 rgba(255, 255, 255, 0.6);
}
.btn-primary:hover {
  box-shadow: 0 18px 46px -14px rgba(124, 196, 255, 0.85),
    inset 0 1px 0 rgba(255, 255, 255, 0.75);
}
.btn-ghost {
  color: var(--fg);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--line);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}
.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.22);
}
.btn-ghost:hover .arrow {
  transform: translate(3px, -3px);
}
.arrow {
  transition: transform 0.35s var(--ease-out);
}

/* ---------- nav ---------- */
.nav-wrap {
  position: fixed;
  top: 18px;
  left: 0;
  right: 0;
  z-index: 90;
  display: flex;
  justify-content: center;
  padding-inline: 20px;
  pointer-events: none;
}
.nav {
  pointer-events: auto;
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 10px 8px 16px;
  border-radius: 999px;
  width: 100%;
  max-width: 940px;
  transition: background 0.4s, box-shadow 0.4s, transform 0.4s var(--ease);
}
.nav.scrolled {
  -webkit-backdrop-filter: blur(28px) saturate(180%);
  backdrop-filter: blur(28px) saturate(180%);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.3),
    0 18px 44px -22px rgba(0, 0, 0, 0.95);
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-right: auto;
}
.brand-mark {
  width: 26px;
  height: 26px;
  border-radius: 9px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, #7cc4ff, #b18cff);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.7),
    0 6px 16px -6px rgba(124, 196, 255, 0.9);
}
.brand-mark svg {
  width: 14px;
  height: 14px;
}
.brand-name {
  font-size: 0.95rem;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 2px;
}
.nav-links a {
  position: relative;
  padding: 8px 13px;
  border-radius: 999px;
  font-size: 0.87rem;
  color: var(--fg-dim);
  transition: color 0.25s, background 0.25s;
}
.nav-links a:hover {
  color: var(--fg);
  background: rgba(255, 255, 255, 0.07);
}
.nav-links a[aria-current="page"] {
  color: var(--fg);
  background: rgba(255, 255, 255, 0.1);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.18);
}
.nav-tools {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: 6px;
}
.icon-btn {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  color: var(--fg-dim);
  transition: background 0.25s, color 0.25s, transform 0.3s var(--ease-out);
}
.icon-btn:hover {
  background: rgba(255, 255, 255, 0.09);
  color: var(--fg);
}
.icon-btn:active {
  transform: scale(0.92);
}
.nav-burger {
  display: none;
}

/* ---------- hero ---------- */
.hero {
  padding-top: 150px;
  padding-bottom: 90px;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.08fr 0.92fr;
  gap: 54px;
  align-items: center;
}
.status {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 6px 13px 6px 10px;
  border-radius: 999px;
  font-size: 0.78rem;
  color: var(--fg-dim);
  margin-bottom: 26px;
  font-family: var(--mono);
  letter-spacing: 0.01em;
}
.pulse {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent-3);
  box-shadow: 0 0 0 0 rgba(94, 240, 208, 0.6);
  animation: pulse 2.4s infinite;
}
@keyframes pulse {
  0% {
    box-shadow: 0 0 0 0 rgba(94, 240, 208, 0.55);
  }
  70% {
    box-shadow: 0 0 0 9px rgba(94, 240, 208, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(94, 240, 208, 0);
  }
}
.hero h1 {
  font-size: clamp(2.6rem, 6.2vw, 4.6rem);
  font-weight: 600;
  letter-spacing: -0.045em;
  line-height: 1.02;
}
.grad-text {
  background: linear-gradient(100deg, #ffffff 6%, #a8dcff 40%, #c9b4ff 72%, #ffffff 96%);
  background-size: 220% 100%;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  animation: sheen 9s linear infinite;
}
@keyframes sheen {
  to {
    background-position: 220% 0;
  }
}
.hero-lede {
  margin: 24px 0 0;
  font-size: 1.06rem;
  line-height: 1.8;
  color: var(--fg-dim);
  max-width: 48ch;
}
.hero-lede strong {
  color: var(--fg);
  font-weight: 500;
}
.hero-cta {
  display: flex;
  gap: 12px;
  margin-top: 34px;
  flex-wrap: wrap;
}
.hero-socials {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-top: 28px;
  flex-wrap: wrap;
}
.hero-socials-label {
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--fg-mute);
}
.hero-socials-label::after {
  content: "";
  display: inline-block;
  width: 22px;
  height: 1px;
  margin-left: 10px;
  vertical-align: 4px;
  background: linear-gradient(90deg, rgba(255, 255, 255, 0.28), transparent);
}
.hero-socials .socials {
  gap: 8px;
}
.hero-socials .social {
  width: 34px;
  height: 34px;
  border-radius: 11px;
  background: rgba(255, 255, 255, 0.045);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}
.hero-meta {
  display: flex;
  gap: 26px;
  margin-top: 34px;
  flex-wrap: wrap;
}
.stat b {
  display: block;
  font-size: 1.35rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
}
.stat span {
  font-size: 0.78rem;
  color: var(--fg-mute);
  font-family: var(--mono);
  letter-spacing: 0.04em;
}

/* terminal / glass identity card */
.term {
  border-radius: var(--r-lg);
  overflow: hidden;
  transform-style: preserve-3d;
  transition: transform 0.5s var(--ease-out);
}
.term-bar {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 13px 16px;
  border-bottom: 1px solid var(--line);
}
.dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.18);
}
.dot.r {
  background: #ff6b6b99;
}
.dot.y {
  background: #ffd47999;
}
.dot.g {
  background: #6ef0a999;
}
.term-name {
  margin-left: 8px;
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--fg-mute);
  letter-spacing: 0.04em;
}
.term-body {
  padding: 20px 20px 24px;
  font-family: var(--mono);
  font-size: 0.79rem;
  line-height: 1.95;
  color: var(--fg-dim);
}
.term-body .k {
  color: var(--accent);
}
.term-body .s {
  color: var(--accent-3);
}
.term-body .n {
  color: var(--accent-2);
}
.term-body .c {
  color: var(--fg-mute);
}
.caret {
  display: inline-block;
  width: 7px;
  height: 15px;
  vertical-align: -2px;
  background: var(--accent);
  animation: blink 1.1s steps(2) infinite;
}
@keyframes blink {
  50% {
    opacity: 0;
  }
}
.orb-card {
  border-radius: var(--r-lg);
  padding: 18px;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 16px;
}
.avatar {
  position: relative;
  width: 62px;
  height: 62px;
  flex: 0 0 auto;
  border-radius: 50%;
  padding: 2px;
}
.avatar::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: conic-gradient(from 0deg, #7cc4ff, #b18cff, #5ef0d0, #7cc4ff);
  box-shadow: 0 0 26px -6px rgba(124, 196, 255, 0.7);
  animation: spin 18s linear infinite;
}
.avatar img {
  position: relative;
  z-index: 1;
  display: block;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  object-fit: cover;
  background: #0b0f18;
  box-shadow: 0 0 0 2px rgba(6, 10, 18, 0.92), inset 0 0 10px rgba(0, 0, 0, 0.35);
}
@keyframes spin {
  to {
    transform: rotate(1turn);
  }
}
.orb-txt b {
  display: block;
  font-size: 0.95rem;
  font-weight: 500;
}
.orb-txt span {
  font-size: 0.79rem;
  color: var(--fg-mute);
  font-family: var(--mono);
}

/* ---------- marquee ---------- */
.marquee {
  margin-top: 26px;
  border-block: 1px solid var(--line);
  padding-block: 16px;
  overflow: hidden;
  mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent);
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent);
}
.marquee-track {
  display: flex;
  gap: 46px;
  width: max-content;
  animation: slide 34s linear infinite;
}
.marquee:hover .marquee-track {
  animation-play-state: paused;
}
.marquee-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--fg-mute);
  white-space: nowrap;
}
.marquee-item i {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--accent);
  opacity: 0.7;
}
@keyframes slide {
  to {
    transform: translateX(-50%);
  }
}

/* ---------- project cards ---------- */
.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.pcard {
  border-radius: var(--r-lg);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  min-height: 232px;
  transition: transform 0.5s var(--ease-out), box-shadow 0.5s;
  transform-style: preserve-3d;
}
.pcard:hover {
  transform: translateY(-6px);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.3),
    0 34px 70px -30px rgba(0, 0, 0, 0.95);
}
.pcard-ico {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  background: linear-gradient(150deg, rgba(124, 196, 255, 0.22), rgba(177, 140, 255, 0.12));
  border: 1px solid rgba(255, 255, 255, 0.14);
  color: var(--accent);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.3);
}
.pcard h3 {
  font-size: 1.06rem;
  font-weight: 550;
}
.pcard p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--fg-dim);
  line-height: 1.7;
  flex: 1;
}
.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.tag {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.04em;
  padding: 4px 9px;
  border-radius: 6px;
  color: var(--fg-mute);
  background: rgba(255, 255, 255, 0.055);
  border: 1px solid var(--line);
}
.pcard-foot {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  color: var(--accent);
  margin-top: 2px;
}
.pcard-foot .arrow {
  transition: transform 0.35s var(--ease-out);
}
.pcard:hover .pcard-foot .arrow {
  transform: translateX(4px);
}

/* ---------- post list ---------- */
.post-row {
  display: flex;
  align-items: center;
  gap: 22px;
  padding: 22px 22px;
  border-radius: var(--r-md);
  transition: transform 0.4s var(--ease-out), background 0.4s, box-shadow 0.4s;
  border: 1px solid transparent;
}
.post-row:hover {
  transform: translateX(4px);
}
.post-row + .post-row {
  margin-top: 10px;
}
.post-date {
  font-family: var(--mono);
  font-size: 0.74rem;
  color: var(--fg-mute);
  letter-spacing: 0.03em;
  flex: 0 0 88px;
}
.post-main {
  flex: 1;
  min-width: 0;
}
.post-main h3 {
  font-size: 1.02rem;
  font-weight: 500;
  transition: color 0.3s;
}
.post-row:hover .post-main h3 {
  color: var(--accent);
}
.post-main p {
  margin: 4px 0 0;
  font-size: 0.86rem;
  color: var(--fg-mute);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.post-tag {
  font-family: var(--mono);
  font-size: 0.7rem;
  padding: 4px 10px;
  border-radius: 99px;
  color: var(--accent-3);
  background: rgba(94, 240, 208, 0.09);
  border: 1px solid rgba(94, 240, 208, 0.2);
  white-space: nowrap;
}

/* ---------- about strip ---------- */
.about {
  border-radius: var(--r-xl);
  padding: 42px;
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 40px;
  align-items: center;
}
.about h2 {
  font-size: clamp(1.4rem, 2.6vw, 1.9rem);
  margin-bottom: 14px;
}
.about p {
  color: var(--fg-dim);
  font-size: 0.95rem;
  margin: 0 0 12px;
}
.skills {
  display: grid;
  gap: 14px;
}
.skill {
  display: grid;
  gap: 7px;
}
.skill-hd {
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--fg-dim);
  font-family: var(--mono);
}
.bar {
  height: 5px;
  border-radius: 99px;
  background: rgba(255, 255, 255, 0.08);
  overflow: hidden;
}
.bar i {
  display: block;
  height: 100%;
  border-radius: 99px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  box-shadow: 0 0 12px rgba(124, 196, 255, 0.55);
  width: 0;
  transition: width 1.4s var(--ease-out);
}

/* ---------- footer ---------- */
footer {
  padding: 44px 0 40px;
  margin-top: 40px;
  border-top: 1px solid var(--line);
}
.foot-grid {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}
.foot-note {
  font-size: 0.82rem;
  color: var(--fg-dim);
  font-family: var(--sans);
  letter-spacing: 0.02em;
}
.foot-top {
  font-family: var(--mono);
  font-size: 0.74rem;
  letter-spacing: 0.06em;
  color: var(--fg-mute);
  transition: color 0.25s var(--ease), transform 0.3s var(--ease-out);
}
.foot-top:hover {
  color: var(--fg);
  transform: translateY(-2px);
}
.socials {
  display: flex;
  gap: 6px;
}
.social {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  color: var(--fg-dim);
  transition: all 0.3s var(--ease-out);
}
.social:hover {
  color: var(--fg);
  border-color: rgba(255, 255, 255, 0.25);
  background: rgba(255, 255, 255, 0.07);
  transform: translateY(-3px);
}

/* ---------- reveal ---------- */
.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.9s var(--ease-out), transform 0.9s var(--ease-out);
}
.reveal.in {
  opacity: 1;
  transform: none;
}

/* ---------- blog page ---------- */
.page-head {
  padding-top: 148px;
  padding-bottom: 40px;
}
.page-head h1 {
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  letter-spacing: -0.04em;
}
.page-head p {
  color: var(--fg-dim);
  margin: 16px 0 0;
  max-width: 52ch;
}
.toolbar {
  display: flex;
  gap: 14px;
  align-items: center;
  flex-wrap: wrap;
  margin: 34px 0 30px;
}
.search {
  flex: 1;
  min-width: 240px;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  border-radius: 999px;
  color: var(--fg-mute);
}
.search input {
  flex: 1;
  background: none;
  border: 0;
  outline: 0;
  color: var(--fg);
  font: inherit;
  font-size: 0.9rem;
}
.search input::placeholder {
  color: var(--fg-mute);
}
.search kbd {
  font-family: var(--mono);
  font-size: 0.68rem;
  padding: 2px 6px;
  border-radius: 5px;
  border: 1px solid var(--line);
  color: var(--fg-mute);
}
.chips {
  display: flex;
  gap: 7px;
  flex-wrap: wrap;
}
.chip {
  font-family: var(--mono);
  font-size: 0.74rem;
  letter-spacing: 0.03em;
  padding: 7px 13px;
  border-radius: 999px;
  color: var(--fg-dim);
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.03);
  transition: all 0.28s var(--ease-out);
}
.chip:hover {
  color: var(--fg);
  border-color: rgba(255, 255, 255, 0.24);
}
.chip.on {
  color: #05121f;
  background: linear-gradient(135deg, #a8dcff, #b18cff);
  border-color: transparent;
  box-shadow: 0 8px 22px -12px rgba(124, 196, 255, 0.9);
}
.blog-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}
.bcard {
  border-radius: var(--r-lg);
  padding: 26px;
  display: flex;
  flex-direction: column;
  gap: 13px;
  transition: transform 0.5s var(--ease-out), box-shadow 0.5s;
  min-height: 210px;
}
.bcard:hover {
  transform: translateY(-5px);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.3),
    0 34px 70px -30px rgba(0, 0, 0, 0.95);
}
.bcard-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--fg-mute);
}
.bcard h3 {
  font-size: 1.14rem;
  font-weight: 550;
  line-height: 1.4;
  transition: color 0.3s;
}
.bcard:hover h3 {
  color: var(--accent);
}
.bcard p {
  margin: 0;
  font-size: 0.88rem;
  color: var(--fg-dim);
  line-height: 1.7;
  flex: 1;
}
.bcard-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-top: 4px;
}
.read {
  font-size: 0.78rem;
  color: var(--fg-mute);
  font-family: var(--mono);
}
.empty {
  text-align: center;
  padding: 70px 20px;
  color: var(--fg-mute);
  font-family: var(--mono);
  font-size: 0.86rem;
}

/* ---------- article ---------- */
.progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  width: 0;
  z-index: 100;
  background: linear-gradient(90deg, var(--accent), var(--accent-2), var(--accent-3));
  box-shadow: 0 0 14px rgba(124, 196, 255, 0.8);
}
.article-wrap {
  padding-top: 128px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 230px;
  gap: 48px;
  align-items: start;
}
.article {
  min-width: 0;
  max-width: 720px;
}
.art-head {
  margin-bottom: 34px;
}
.art-kicker {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--mono);
  font-size: 0.74rem;
  color: var(--fg-mute);
  margin-bottom: 18px;
  flex-wrap: wrap;
}
.art-head h1 {
  font-size: clamp(1.9rem, 4.2vw, 2.9rem);
  line-height: 1.18;
  letter-spacing: -0.035em;
}
.art-meta {
  display: flex;
  gap: 18px;
  align-items: center;
  margin-top: 22px;
  padding-bottom: 26px;
  border-bottom: 1px solid var(--line);
  font-size: 0.82rem;
  color: var(--fg-mute);
  font-family: var(--mono);
  flex-wrap: wrap;
}
.art-meta .who {
  display: flex;
  align-items: center;
  gap: 9px;
  color: var(--fg-dim);
}
.who-av {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  object-fit: cover;
  flex: 0 0 auto;
  background: rgba(255, 255, 255, 0.08);
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.18);
}
.prose {
  font-size: 1.02rem;
  line-height: 1.85;
  color: #cfd7e6;
}
.prose > *:first-child {
  margin-top: 0;
}
.prose h2 {
  font-size: 1.42rem;
  margin: 2.4em 0 0.7em;
  letter-spacing: -0.025em;
  scroll-margin-top: 110px;
}
.prose h3 {
  font-size: 1.14rem;
  margin: 1.9em 0 0.6em;
  scroll-margin-top: 110px;
}
.prose p {
  margin: 0 0 1.35em;
}
.prose a {
  color: var(--accent);
  border-bottom: 1px solid rgba(124, 196, 255, 0.35);
  transition: border-color 0.25s, color 0.25s;
}
.prose a:hover {
  border-color: var(--accent);
}
.prose strong {
  color: var(--fg);
  font-weight: 600;
}
.prose ul,
.prose ol {
  margin: 0 0 1.35em;
  padding-left: 1.25em;
}
.prose li {
  margin-bottom: 0.5em;
}
.prose li::marker {
  color: var(--accent);
}
.prose blockquote {
  margin: 1.8em 0;
  padding: 18px 22px;
  border-left: 2px solid var(--accent);
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
  background: rgba(124, 196, 255, 0.06);
  color: var(--fg-dim);
  font-size: 0.97rem;
}
.prose blockquote p:last-child {
  margin: 0;
}
.prose hr {
  border: 0;
  border-top: 1px solid var(--line);
  margin: 2.6em 0;
}
.prose code:not(pre code) {
  font-family: var(--mono);
  font-size: 0.86em;
  padding: 2px 6px;
  border-radius: 5px;
  background: rgba(124, 196, 255, 0.12);
  color: #a8dcff;
  border: 1px solid rgba(124, 196, 255, 0.16);
}
.prose pre {
  position: relative;
  margin: 1.8em 0;
  padding: 20px;
  border-radius: var(--r-md);
  background: rgba(3, 6, 14, 0.72);
  border: 1px solid var(--line);
  overflow-x: auto;
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08);
}
.prose pre code {
  font-family: var(--mono);
  font-size: 0.84rem;
  line-height: 1.75;
  color: #d5dced;
  white-space: pre;
}
/* token colors */
.tok-c {
  color: #64708a;
  font-style: italic;
}
.tok-s {
  color: #7fe3c4;
}
.tok-n {
  color: #c4aaff;
}
.tok-k {
  color: #7cc4ff;
}

.copy-btn {
  position: absolute;
  top: 10px;
  right: 10px;
  font-family: var(--mono);
  font-size: 0.68rem;
  padding: 5px 9px;
  border-radius: 6px;
  color: #93a0b8;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.05);
  opacity: 0.45;
  transition: all 0.25s;
}
.prose pre:hover .copy-btn {
  opacity: 1;
}
.copy-btn:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.14);
}
.art-foot {
  margin-top: 60px;
  padding-top: 30px;
  border-top: 1px solid var(--line);
  display: grid;
  gap: 14px;
}
.pager {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
.pager a {
  border-radius: var(--r-md);
  padding: 18px 20px;
  transition: transform 0.4s var(--ease-out);
}
.pager a:hover {
  transform: translateY(-3px);
}
.pager .lbl {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--fg-mute);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.pager b {
  display: block;
  margin-top: 6px;
  font-size: 0.92rem;
  font-weight: 500;
}
.pager a.next {
  text-align: right;
}
.toc {
  position: sticky;
  top: 104px;
  border-radius: var(--r-md);
  padding: 20px;
  font-size: 0.82rem;
  background: linear-gradient(160deg, rgba(8, 11, 20, 0.62), rgba(8, 11, 20, 0.34));
}
.toc-t {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--fg-mute);
  margin-bottom: 12px;
}
.toc a {
  display: block;
  padding: 6px 0 6px 12px;
  font-size: 0.79rem;
  line-height: 1.55;
  color: var(--fg-dim);
  border-left: 1px solid var(--line);
  transition: color 0.25s, border-color 0.25s;
}
.toc a:hover {
  color: var(--fg);
}
.toc a.on {
  color: var(--accent);
  border-color: var(--accent);
}

/* ---------- hero role line ---------- */
.hero-role {
  margin: 18px 0 0;
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--fg-mute);
}
.hero-role::after {
  content: "";
  display: inline-block;
  width: 44px;
  height: 1px;
  margin-left: 14px;
  vertical-align: 4px;
  background: linear-gradient(90deg, var(--fg-mute), transparent);
}

/* ---------- tables in prose ---------- */
.prose .table-wrap {
  margin: 1.9em 0;
  border-radius: var(--r-md);
  border: 1px solid var(--line);
  overflow-x: auto;
  overflow-y: hidden;
  background: rgba(255, 255, 255, 0.03);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
}
.prose .table-wrap::-webkit-scrollbar {
  height: 6px;
}
.prose table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}
.prose th,
.prose td {
  padding: 11px 16px;
  text-align: left;
  border-bottom: 1px solid var(--line);
}
.prose th {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--fg-mute);
  font-weight: 500;
  background: rgba(255, 255, 255, 0.04);
}
.prose tr:last-child td {
  border-bottom: 0;
}
.prose td {
  color: var(--fg-dim);
}
.prose tbody tr {
  transition: background 0.25s;
}
.prose tbody tr:hover {
  background: rgba(124, 196, 255, 0.05);
}

/* ---------- back link ---------- */
.back {
  transition: color 0.25s, transform 0.3s var(--ease-out);
}
.back:hover {
  color: var(--accent);
}
.back svg {
  transition: transform 0.3s var(--ease-out);
}
.back:hover svg {
  transform: translateX(-3px);
}

/* ---------- responsive ---------- */
@media (max-width: 980px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 42px;
  }
  .about {
    grid-template-columns: 1fr;
    padding: 32px;
  }
  .cards {
    grid-template-columns: repeat(2, 1fr);
  }
  .article-wrap {
    grid-template-columns: minmax(0, 1fr);
  }
  .toc {
    display: none;
  }
}
@media (max-width: 760px) {
  section {
    padding-block: 68px;
  }
  .nav {
    padding: 8px 10px;
  }
  .nav-links {
    position: absolute;
    top: 62px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    padding: 10px;
    border-radius: var(--r-lg);
    background: rgba(11, 15, 24, 0.975);
    border: 1px solid rgba(255, 255, 255, 0.14);
    -webkit-backdrop-filter: blur(30px) saturate(170%);
    backdrop-filter: blur(30px) saturate(170%);
    box-shadow: 0 30px 60px -24px rgba(0, 0, 0, 0.95);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: all 0.3s var(--ease-out);
  }
  .nav.open .nav-links {
    opacity: 1;
    visibility: visible;
    transform: none;
  }
  .nav-links a {
    padding: 11px 14px;
  }
  .nav-burger {
    display: grid;
    margin-left: 4px;
  }
  .hero {
    padding-top: 126px;
  }
  .cards,
  .blog-grid {
    grid-template-columns: 1fr;
  }
  .post-row {
    flex-wrap: wrap;
    gap: 6px 14px;
    padding: 18px;
  }
  .post-date {
    flex: 0 0 auto;
  }
  .post-main p {
    white-space: normal;
  }
  .post-tag {
    display: none;
  }
  .pager {
    grid-template-columns: 1fr;
  }
  .pager a.next {
    text-align: left;
  }
  .page-head,
  .article-wrap {
    padding-top: 118px;
  }
  .art-meta {
    gap: 8px 14px;
  }
  .art-meta .sep {
    display: none;
  }
  .marquee-track {
    gap: 30px;
  }
  .prose {
    font-size: 0.99rem;
  }
  .prose th,
  .prose td {
    white-space: nowrap;
  }
  .prose .table-wrap table {
    min-width: 520px;
  }
}
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001s !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001s !important;
    scroll-behavior: auto !important;
  }
  .reveal {
    opacity: 1;
    transform: none;
  }
}