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

/* ========== ROOT VARIABLES ========== */
:root {
  color-scheme: dark;
  --clr-deep: #0B1B2B;
  --clr-ocean: #102A43;
  --clr-nebula: #1C3A5F;
  --clr-orange: #FF6B35;
  --clr-neon: #39FF14;
  --clr-cyan: #00E5FF;
  --clr-cloud: #F8FAFC;
  --clr-steel: #9FB3C8;
  --clr-violet: #7A5AF8;
  --clr-amber: #FFB020;
  --font-display: "Anton", "Impact", "Arial Narrow", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Open Sans", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "Roboto Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --radius-lg: 24px;
  --radius-md: 14px;
  --radius-pill: 999px;
  --shadow-panel: 0 12px 40px rgba(0, 0, 0, 0.35);
  --ease-out: cubic-bezier(0.22, 0.61, 0.36, 1);
  --container-w: 1200px;
}

/* ========== BASE ========== */
html {
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  background-color: var(--clr-deep);
  background-image:
    linear-gradient(rgba(159, 179, 200, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(159, 179, 200, 0.035) 1px, transparent 1px);
  background-size: 44px 44px;
  color: var(--clr-cloud);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  padding-top: 96px;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

body::before {
  content: '';
  position: fixed;
  top: -18%;
  left: -12%;
  width: 58vw;
  height: 58vw;
  background: radial-gradient(circle, rgba(122, 90, 248, 0.15) 0%, transparent 65%);
  z-index: -1;
  pointer-events: none;
}

body::after {
  content: '';
  position: fixed;
  bottom: -25%;
  right: -14%;
  width: 64vw;
  height: 64vw;
  background: radial-gradient(circle, rgba(0, 229, 255, 0.09) 0%, transparent 60%);
  z-index: -1;
  pointer-events: none;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: 0.02em;
  color: var(--clr-cloud);
  text-wrap: balance;
}

p {
  margin-bottom: 1em;
}

a {
  color: var(--clr-cyan);
  text-decoration: none;
  transition: color 200ms ease-out;
}

a:hover {
  color: var(--clr-neon);
}

::selection {
  background: rgba(255, 107, 53, 0.4);
  color: var(--clr-cloud);
}

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

::-webkit-scrollbar {
  width: 10px;
}

::-webkit-scrollbar-track {
  background: var(--clr-deep);
}

::-webkit-scrollbar-thumb {
  background: var(--clr-nebula);
  border-radius: 8px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--clr-ocean);
}

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

ul, ol {
  padding-left: 1.4em;
}

/* ========== UTILITIES ========== */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.container {
  width: 100%;
  max-width: var(--container-w);
  margin-inline: auto;
  padding-inline: 32px;
}

.section {
  padding-block: 72px;
}

.section--alt {
  background: linear-gradient(180deg, rgba(16, 42, 67, 0.55) 0%, transparent 100%);
  border-radius: var(--radius-lg);
}

#main-content {
  outline: none;
  scroll-margin-top: 110px;
}

/* ========== SKIP LINK ========== */
.skip-link {
  position: fixed;
  top: -100px;
  left: 20px;
  z-index: 2000;
  padding: 12px 28px;
  background: var(--clr-neon);
  color: var(--clr-deep);
  font-weight: 700;
  font-size: 14px;
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  text-decoration: none;
  transition: top 200ms ease-out;
}

.skip-link:focus {
  top: 0;
}

/* ========== HEADER ========== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 16px 24px;
  pointer-events: none;
}

.nav-pill {
  position: relative;
  max-width: 1160px;
  margin-inline: auto;
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 8px 8px 8px 10px;
  background: rgba(16, 42, 67, 0.86);
  backdrop-filter: blur(18px) saturate(1.4);
  -webkit-backdrop-filter: blur(18px) saturate(1.4);
  border: 1px solid rgba(159, 179, 200, 0.16);
  border-radius: var(--radius-pill);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.35);
  pointer-events: auto;
}

/* Brand */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  white-space: nowrap;
  flex-shrink: 0;
}

.brand__mark {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 42px;
  background: linear-gradient(140deg, var(--clr-nebula) 0%, var(--clr-deep) 100%);
  clip-path: polygon(50% 0%, 96% 22%, 96% 74%, 50% 100%, 4% 74%, 4% 22%);
  font-family: var(--font-display);
  font-size: 11px;
  font-weight: 400;
  color: var(--clr-neon);
  letter-spacing: 0.05em;
  text-shadow: 0 0 10px rgba(57, 255, 20, 0.55);
}

.brand__mark::after {
  content: '';
  position: absolute;
  bottom: 6px;
  left: 12%;
  right: 12%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--clr-neon), transparent);
  border-radius: 2px;
  opacity: 0.75;
}

.brand__text {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  color: var(--clr-cloud);
  letter-spacing: 0.05em;
  line-height: 1;
}

.brand__sub {
  font-family: var(--font-body);
  font-size: 11px;
  font-weight: 400;
  color: var(--clr-steel);
  letter-spacing: 0.1em;
  margin-left: 3px;
}

/* Nav pill list */
.nav-pill__nav {
  flex: 1;
  display: flex;
  justify-content: center;
  min-width: 0;
}

.nav-pill__list {
  display: flex;
  align-items: center;
  gap: 2px;
  list-style: none;
  padding: 0;
}

.nav-pill__link {
  display: inline-block;
  padding: 8px 15px;
  border-radius: var(--radius-pill);
  color: var(--clr-steel);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.02em;
  white-space: nowrap;
  transition: color 200ms ease-out, background 200ms ease-out, box-shadow 200ms ease-out;
}

.nav-pill__link:hover {
  color: var(--clr-cloud);
  background: rgba(159, 179, 200, 0.1);
}

.nav-pill__link[aria-current="page"] {
  color: var(--clr-neon);
  background: rgba(57, 255, 20, 0.12);
  box-shadow: inset 0 0 0 1px rgba(57, 255, 20, 0.28);
}

/* Status */
.nav-status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  background: rgba(57, 255, 20, 0.07);
  border: 1px solid rgba(57, 255, 20, 0.18);
  flex-shrink: 0;
}

.nav-status__text {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--clr-neon);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.status-light {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--clr-neon);
  box-shadow: 0 0 8px rgba(57, 255, 20, 0.6);
  animation: status-pulse 2s ease-in-out infinite;
}

@keyframes status-pulse {
  0%, 100% { opacity: 1; box-shadow: 0 0 8px rgba(57, 255, 20, 0.6); }
  50% { opacity: 0.35; box-shadow: 0 0 2px rgba(57, 255, 20, 0.15); }
}

/* Nav toggle */
.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  background: rgba(159, 179, 200, 0.12);
  border: 1px solid rgba(159, 179, 200, 0.26);
  border-radius: 50%;
  cursor: pointer;
  padding: 0;
  flex-shrink: 0;
  transition: background 200ms ease-out, border-color 200ms ease-out;
}

.nav-toggle:hover {
  background: rgba(159, 179, 200, 0.2);
  border-color: rgba(57, 255, 20, 0.4);
}

.nav-toggle__bar {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--clr-cloud);
  border-radius: 2px;
  transition: transform 250ms ease-out, opacity 200ms ease-out;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Header responsive */
@media (max-width: 1080px) {
  .nav-status {
    display: none;
  }

  .nav-pill__link {
    padding: 8px 11px;
    font-size: 13px;
  }
}

@media (max-width: 880px) {
  body {
    padding-top: 84px;
  }

  .site-header {
    padding: 12px 16px;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .nav-pill {
    gap: 12px;
  }

  .nav-pill__nav {
    position: absolute;
    top: calc(100% + 12px);
    left: 0;
    right: 0;
    display: block;
    justify-content: initial;
    background: rgba(16, 42, 67, 0.97);
    backdrop-filter: blur(22px);
    -webkit-backdrop-filter: blur(22px);
    border-radius: 22px;
    border: 1px solid rgba(159, 179, 200, 0.18);
    box-shadow: 0 24px 60px rgba(0, 0, 0, 0.5);
    padding: 14px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-14px);
    transition: opacity 250ms ease-out, transform 250ms ease-out, visibility 250ms;
    pointer-events: none;
  }

  .nav-pill__nav[data-open] {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    pointer-events: auto;
  }

  .nav-pill__list {
    flex-direction: column;
    gap: 4px;
  }

  .nav-pill__link {
    display: block;
    padding: 13px 18px;
    font-size: 15px;
    border-radius: 14px;
  }

  .nav-pill__link[aria-current="page"] {
    background: rgba(57, 255, 20, 0.14);
  }
}

@media (max-width: 520px) {
  .brand__sub {
    display: none;
  }

  .brand__text {
    font-size: 16px;
  }
}

/* ========== FOOTER ========== */
.site-footer {
  position: relative;
  margin-top: 80px;
  padding-top: 64px;
  background: linear-gradient(180deg, var(--clr-deep) 0%, var(--clr-ocean) 120%);
  border-top: 1px solid rgba(159, 179, 200, 0.1);
  overflow: hidden;
}

.site-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--clr-orange), var(--clr-neon) 40%, var(--clr-cyan) 90%);
  opacity: 0.65;
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.3fr;
  gap: 40px;
  padding-bottom: 52px;
}

.footer-meta {
  display: flex;
  flex-direction: column;
  gap: 16px;
  align-items: flex-start;
}

.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.footer-brand__mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 46px;
  background: linear-gradient(140deg, var(--clr-nebula) 0%, var(--clr-deep) 100%);
  clip-path: polygon(50% 0%, 96% 22%, 96% 74%, 50% 100%, 4% 74%, 4% 22%);
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 400;
  color: var(--clr-neon);
  text-shadow: 0 0 10px rgba(57, 255, 20, 0.5);
}

.footer-brand__name {
  font-family: var(--font-display);
  font-size: 20px;
  color: var(--clr-cloud);
  letter-spacing: 0.04em;
}

.footer-brand__note {
  color: var(--clr-steel);
  font-size: 13.5px;
  line-height: 1.8;
  max-width: 330px;
  margin: 0;
}

.footer-col {
  display: flex;
  flex-direction: column;
}

.footer-col__title {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  color: var(--clr-cyan);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: 18px;
}

.footer-col__list {
  list-style: none;
  padding: 0;
  display: grid;
  gap: 11px;
}

.footer-col__list a {
  color: var(--clr-steel);
  font-size: 14px;
  transition: color 200ms ease-out, padding-left 200ms ease-out;
}

.footer-col__list a:hover {
  color: var(--clr-neon);
  padding-left: 6px;
}

.footer-col__text {
  color: var(--clr-steel);
  font-size: 14px;
  line-height: 1.7;
  margin-bottom: 8px;
}

.footer-col__text--muted {
  color: rgba(159, 179, 200, 0.72);
  font-size: 13px;
}

.footer-col__text--sm {
  font-size: 12px;
  margin-top: 4px;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  border-top: 1px solid rgba(159, 179, 200, 0.1);
  padding-block: 20px;
}

.footer-bottom__copy,
.footer-bottom__icp {
  font-family: var(--font-mono);
  font-size: 13px;
  color: rgba(159, 179, 200, 0.7);
  margin: 0;
}

/* Footer responsive */
@media (max-width: 960px) {
  .footer-top {
    grid-template-columns: 1fr 1fr;
    gap: 36px 32px;
  }

  .footer-meta {
    grid-column: 1 / -1;
  }
}

@media (max-width: 560px) {
  .footer-top {
    grid-template-columns: 1fr;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* ========== BUTTONS ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 30px;
  border-radius: var(--radius-pill);
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-decoration: none;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform 200ms ease-out, box-shadow 250ms ease-out, background 250ms ease-out, border-color 250ms ease-out, color 250ms ease-out;
}

.btn--primary {
  background: linear-gradient(135deg, var(--clr-orange) 0%, #E8551F 100%);
  color: #FFFFFF;
  box-shadow: 0 8px 24px rgba(255, 107, 53, 0.28);
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 36px rgba(255, 107, 53, 0.4);
  color: #FFFFFF;
}

.btn--ghost {
  background: transparent;
  color: var(--clr-cloud);
  border-color: rgba(159, 179, 200, 0.4);
}

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

/* ========== TYPOGRAPHY COMPONENTS ========== */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 400;
  color: var(--clr-steel);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.eyebrow::before {
  content: '';
  width: 26px;
  height: 2px;
  background: var(--clr-neon);
  border-radius: 2px;
  flex-shrink: 0;
}

.eyebrow--accent {
  color: var(--clr-neon);
}

.display-title {
  font-family: var(--font-display);
  font-size: clamp(40px, 7vw, 82px);
  font-weight: 700;
  line-height: 0.98;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--clr-cloud);
  margin-bottom: 18px;
}

.display-title .text-accent {
  color: var(--clr-orange);
}

.display-title .text-neon {
  color: var(--clr-neon);
}

.lead {
  font-size: 18px;
  font-weight: 300;
  line-height: 1.8;
  color: var(--clr-steel);
  max-width: 62ch;
}

.prose {
  max-width: 72ch;
  color: var(--clr-steel);
  font-size: 16px;
  line-height: 1.9;
}

.prose h2 {
  font-family: var(--font-display);
  font-size: 28px;
  color: var(--clr-cloud);
  margin-top: 42px;
  margin-bottom: 14px;
}

.prose h3 {
  font-size: 20px;
  color: var(--clr-cloud);
  margin-top: 28px;
  margin-bottom: 10px;
}

.prose p {
  margin-bottom: 1.2em;
}

.prose a {
  color: var(--clr-cyan);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.prose a:hover {
  color: var(--clr-neon);
}

.prose ul {
  margin-bottom: 1.2em;
}

.prose li {
  margin-bottom: 6px;
}

/* ========== GRID & EDITORIAL SPLIT ========== */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

@media (max-width: 900px) {
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 560px) {
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
}

.editorial-split {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 48px;
  align-items: start;
}

.editorial-split__note {
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.9;
  color: var(--clr-steel);
  padding-top: 10px;
  border-top: 2px solid var(--clr-neon);
}

@media (max-width: 900px) {
  .editorial-split {
    grid-template-columns: 1fr;
    gap: 18px;
  }
}

/* ========== HERO FRAME ========== */
.hero-frame {
  position: relative;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(159, 179, 200, 0.16);
  background: linear-gradient(160deg, rgba(16, 42, 67, 0.92) 0%, rgba(11, 27, 43, 0.88) 100%);
  padding: clamp(32px, 6vw, 72px);
  overflow: hidden;
}

.hero-frame::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--clr-orange), var(--clr-neon) 60%, transparent);
}

.hero-frame::after {
  content: '';
  position: absolute;
  top: 14px;
  right: 18px;
  height: 22px;
  width: 130px;
  background: repeating-linear-gradient(
    90deg,
    rgba(159, 179, 200, 0.4) 0 2px,
    transparent 2px 8px
  );
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 30%);
  mask-image: linear-gradient(90deg, transparent, #000 30%);
  pointer-events: none;
}

.hero-frame__corner {
  position: absolute;
  width: 26px;
  height: 26px;
  border: 0 solid var(--clr-neon);
  opacity: 0.55;
  pointer-events: none;
}

.hero-frame__corner--tl {
  top: 14px;
  left: 14px;
  border-top-width: 2px;
  border-left-width: 2px;
  border-top-left-radius: 8px;
}

.hero-frame__corner--br {
  bottom: 14px;
  right: 14px;
  border-bottom-width: 2px;
  border-right-width: 2px;
  border-bottom-right-radius: 8px;
}

/* ========== TILT BAND ========== */
.tilt-band {
  position: relative;
  padding-block: 88px;
  margin-block: 24px;
  background: linear-gradient(135deg, var(--clr-ocean) 0%, rgba(28, 58, 95, 0.65) 100%);
  clip-path: polygon(0 4%, 100% 0%, 100% 96%, 0% 100%);
}

.tilt-band > .container {
  position: relative;
  z-index: 1;
}

/* ========== DATA CARD ========== */
.data-card {
  position: relative;
  background: linear-gradient(150deg, rgba(28, 58, 95, 0.85) 0%, rgba(16, 42, 67, 0.92) 100%);
  border: 1px solid rgba(159, 179, 200, 0.14);
  border-radius: var(--radius-lg);
  padding: 26px 24px;
  overflow: hidden;
  transition: transform 250ms ease-out, border-color 250ms ease-out, box-shadow 250ms ease-out;
}

.data-card::after {
  content: '';
  position: absolute;
  top: -40px;
  right: -40px;
  width: 130px;
  height: 130px;
  background: radial-gradient(circle, rgba(0, 229, 255, 0.1) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.data-card:hover {
  transform: translateY(-4px);
  border-color: rgba(57, 255, 20, 0.3);
  box-shadow: 0 16px 44px rgba(0, 0, 0, 0.3);
}

.data-card__value {
  display: block;
  font-family: var(--font-mono);
  font-size: 42px;
  font-weight: 700;
  line-height: 1.1;
  color: var(--clr-neon);
}

.data-card__value--orange {
  color: var(--clr-orange);
}

.data-card__value--cyan {
  color: var(--clr-cyan);
}

.data-card__label {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--clr-steel);
  margin-top: 8px;
}

.data-card__note {
  font-size: 14px;
  color: var(--clr-steel);
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid rgba(159, 179, 200, 0.12);
}

/* ========== TAG PILL ========== */
.tag-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 15px;
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--clr-cyan);
  background: rgba(0, 229, 255, 0.07);
  border: 1px solid rgba(0, 229, 255, 0.2);
  white-space: nowrap;
}

.tag-pill--orange {
  color: var(--clr-orange);
  background: rgba(255, 107, 53, 0.07);
  border-color: rgba(255, 107, 53, 0.2);
}

.tag-pill--amber {
  color: var(--clr-amber);
  background: rgba(255, 176, 32, 0.07);
  border-color: rgba(255, 176, 32, 0.22);
}

/* ========== FILTER BAR ========== */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.filter-btn {
  padding: 8px 22px;
  border-radius: var(--radius-pill);
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 600;
  color: var(--clr-steel);
  background: rgba(159, 179, 200, 0.08);
  border: 1px solid rgba(159, 179, 200, 0.16);
  cursor: pointer;
  transition: color 200ms ease-out, background 200ms ease-out, border-color 200ms ease-out, box-shadow 200ms ease-out;
}

.filter-btn:hover {
  color: var(--clr-cloud);
  border-color: rgba(159, 179, 200, 0.4);
}

.filter-btn.is-active,
.filter-btn[data-active] {
  color: var(--clr-deep);
  background: linear-gradient(135deg, var(--clr-neon) 0%, #6BF145 100%);
  border-color: transparent;
  box-shadow: 0 4px 18px rgba(57, 255, 20, 0.25);
  font-weight: 700;
}

.filter-item.is-hidden,
.filter-item[data-hidden] {
  display: none;
}

/* ========== IMAGE FRAME ========== */
.image-frame {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: linear-gradient(140deg, var(--clr-ocean) 0%, var(--clr-nebula) 100%);
  aspect-ratio: 16 / 10;
}

.image-frame::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    linear-gradient(135deg, rgba(255, 107, 53, 0.09) 0%, transparent 50%),
    linear-gradient(45deg, rgba(0, 229, 255, 0.05) 0%, transparent 50%);
  background-size: 48px 48px;
  pointer-events: none;
  z-index: 1;
}

.image-frame[data-caption]::after {
  content: attr(data-caption);
  position: absolute;
  left: 12px;
  bottom: 12px;
  z-index: 2;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--clr-cloud);
  background: rgba(11, 27, 43, 0.74);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  padding: 5px 14px;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(159, 179, 200, 0.2);
}

.image-frame--tall {
  aspect-ratio: 4 / 5;
}

.image-frame--wide {
  aspect-ratio: 21 / 9;
}

.image-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.image-frame .image-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 14px;
  color: rgba(159, 179, 200, 0.5);
}

/* ========== BREADCRUMB ========== */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--clr-steel);
  padding: 0;
  margin-bottom: 32px;
}

.breadcrumb a {
  color: var(--clr-cyan);
  transition: color 200ms ease-out;
}

.breadcrumb a:hover {
  color: var(--clr-neon);
}

.breadcrumb li + li::before {
  content: '/';
  margin-inline: 8px;
  color: rgba(159, 179, 200, 0.4);
}

.breadcrumb [aria-current="page"] {
  color: var(--clr-cloud);
}

/* ========== READ CONSOLE ========== */
.read-console {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 900;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 12px;
  padding: 10px 16px;
  background: rgba(16, 42, 67, 0.9);
  backdrop-filter: blur(16px) saturate(1.3);
  -webkit-backdrop-filter: blur(16px) saturate(1.3);
  border: 1px solid rgba(159, 179, 200, 0.16);
  border-radius: 18px;
  box-shadow: 0 14px 40px rgba(0, 0, 0, 0.4);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--clr-steel);
  opacity: 0;
  transform: translateY(14px);
  pointer-events: none;
  transition: opacity 300ms ease-out, transform 300ms ease-out;
}

.read-console.is-on {
  opacity: 1;
  transform: translateY(0);
}

.read-console__hot {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--clr-neon);
  background: rgba(57, 255, 20, 0.1);
  border: 1px solid rgba(57, 255, 20, 0.22);
  padding: 3px 9px;
  border-radius: 6px;
}

.read-console__section {
  max-width: 120px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--clr-cloud);
  font-size: 12px;
}

.read-console__track {
  width: 90px;
  height: 4px;
  border-radius: 4px;
  background: rgba(159, 179, 200, 0.16);
  overflow: hidden;
}

.read-console__bar {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--clr-orange), var(--clr-neon));
  border-radius: 4px;
  transition: width 100ms linear;
}

.read-console__pct {
  color: var(--clr-neon);
  font-size: 13px;
  font-weight: 700;
  min-width: 44px;
  text-align: right;
}

@media (max-width: 560px) {
  .read-console {
    bottom: 16px;
    right: 16px;
    grid-template-columns: auto 1fr;
    padding: 8px 14px;
  }

  .read-console__pct {
    display: none;
  }

  .read-console__track {
    width: 70px;
  }
}

/* ========== REVEAL ANIMATION ========== */
.js [data-reveal] {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 500ms ease-out, transform 500ms ease-out;
}

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

/* ========== RESPONSIVE CONTAINER ========== */
@media (max-width: 768px) {
  .container {
    padding-inline: 20px;
  }

  .section {
    padding-block: 52px;
  }
}

/* ========== REDUCED MOTION ========== */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .status-light,
  .read-console__hot {
    animation: none;
  }

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

  .read-console {
    transition: none;
  }
}