/* ========== Reset & Tokens ========== */
:root {
  --primary: #0B3D2E;
  --primary-light: #155D4F;
  --accent: #FF6B35;
  --bg-dark: #1A1A1A;
  --surface: rgba(255, 255, 255, 0.08);
  --surface-strong: rgba(255, 255, 255, 0.16);
  --text-primary: #FFFFFF;
  --text-secondary: rgba(255, 255, 255, 0.65);
  --line: rgba(255, 255, 255, 0.2);
  --success: #34C77B;
  --warning: #FFC107;
  --font-heading: "Impact", "Roboto Condensed", "Arial Narrow", sans-serif;
  --font-body: "Inter", system-ui, -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --container-width: 1160px;
  --sidebar-width: 260px;
  --radius: 16px;
}

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

* {
  margin: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  min-height: 100vh;
  overflow-x: hidden;
  background:
    repeating-linear-gradient(0deg, transparent 0, transparent 39px, rgba(255, 255, 255, 0.016) 39px, rgba(255, 255, 255, 0.016) 40px),
    radial-gradient(1200px 560px at 88% -140px, rgba(255, 107, 53, 0.08), transparent 60%),
    linear-gradient(160deg, #11372b 0%, #0a241c 46%, #111111 100%);
  background-attachment: fixed;
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

@media (min-width: 1024px) {
  body {
    padding-left: var(--sidebar-width);
  }
}

body.site-nav-open {
  overflow: hidden;
}

[hidden] {
  display: none !important;
}

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

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

img, picture, video, svg {
  display: block;
  max-width: 100%;
}

button, input, select, textarea {
  font: inherit;
  color: inherit;
}

button {
  background: none;
  border: none;
  padding: 0;
}

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

@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;
  }
}

/* ========== Typography ========== */
h1, h2, h3, h4 {
  font-family: var(--font-heading);
  line-height: 1.1;
  font-weight: 700;
  letter-spacing: 0.01em;
  text-wrap: balance;
}

h1 {
  font-size: clamp(44px, 7vw, 72px);
}

h2 {
  font-size: clamp(34px, 5vw, 52px);
}

h3 {
  font-size: 24px;
}

.text-link {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 4px;
  transition: color 0.2s;
}

.text-link:hover {
  color: #ff9a73;
}

/* ========== Layout ========== */
.container {
  width: min(var(--container-width), calc(100% - 48px));
  margin-inline: auto;
}

.container--narrow {
  max-width: 820px;
}

#main-content {
  min-height: 60vh;
}

.section {
  padding-block: clamp(48px, 7vw, 80px);
}

.section--tight {
  padding-block: clamp(32px, 5vw, 56px);
}

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 28px;
}

.section-head__title {
  max-width: 60ch;
}

.section-head__link {
  color: var(--text-secondary);
  font-size: 14px;
  white-space: nowrap;
}

.section-head__link:hover {
  color: #fff;
}

.page-hero {
  position: relative;
  padding: clamp(56px, 9vw, 104px) 0 clamp(32px, 6vw, 56px);
}

.page-hero::after {
  content: "";
  position: absolute;
  right: 0;
  top: 0;
  width: 36%;
  height: 220px;
  background: linear-gradient(160deg, rgba(255, 107, 53, 0.12), transparent 70%);
  pointer-events: none;
}

.page-title {
  margin-top: 12px;
  max-width: 18ch;
}

.page-description {
  max-width: 640px;
  margin-top: 14px;
  font-size: 17px;
  color: var(--text-secondary);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--accent);
}

.eyebrow::before {
  content: "";
  display: block;
  width: 28px;
  height: 2px;
  background: currentColor;
}

.divider {
  border: 0;
  border-top: 1px solid var(--line);
  margin: 24px 0;
}

/* ========== Grid ========== */
.grid {
  display: grid;
  gap: 24px;
}

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

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

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

@media (max-width: 1024px) {
  .grid--4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 760px) {
  .grid--3 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 560px) {
  .grid--2,
  .grid--3,
  .grid--4 {
    grid-template-columns: minmax(0, 1fr);
  }
}

/* ========== Buttons ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 30px;
  border: 1px solid transparent;
  border-radius: 2px 16px 2px 2px;
  background: transparent;
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 500;
  line-height: 1;
  letter-spacing: 0.04em;
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.2s, background 0.2s, border-color 0.2s, color 0.2s;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn:active {
  transform: translateY(0) scale(0.98);
}

.btn--accent {
  background: var(--accent);
  color: #13231b;
}

.btn--accent:hover {
  background: #ff8459;
  border-color: rgba(255, 255, 255, 0.2);
}

.btn--outline {
  border-color: rgba(255, 255, 255, 0.35);
  color: #fff;
}

.btn--outline:hover {
  border-color: #fff;
  background: rgba(255, 255, 255, 0.04);
}

.btn--glass {
  border-color: rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.btn--glass:hover {
  background: rgba(255, 255, 255, 0.14);
}

/* ========== Badges ========== */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-secondary);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.05em;
}

.badge--accent {
  border-color: rgba(255, 107, 53, 0.4);
  background: rgba(255, 107, 53, 0.14);
  color: #ff9a73;
}

.badge--warning {
  border-color: rgba(255, 193, 7, 0.3);
  background: rgba(255, 193, 7, 0.1);
  color: #ffd54d;
}

/* ========== Cards ========== */
.card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.03);
  padding: 24px;
}

.glass-card {
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: var(--radius);
  background: var(--surface);
  padding: 24px;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

.card:hover,
.glass-card:hover {
  background: var(--surface-strong);
  transition: background 0.25s;
}

/* ========== Image frame ========== */
.image-frame {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background-color: var(--primary);
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
  background-size: 28px 28px;
  background-position: center;
}

.image-frame > img {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.image-frame[data-label]::after {
  content: attr(data-label);
  position: absolute;
  left: 12px;
  bottom: 12px;
  z-index: 2;
  background: rgba(0, 0, 0, 0.55);
  color: #fff;
  font-size: 12px;
  line-height: 1;
  padding: 7px 10px;
  border-radius: 6px;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}

.image-frame--16-9 {
  aspect-ratio: 16 / 9;
}

.image-frame--4-3 {
  aspect-ratio: 4 / 3;
}

.image-frame--3-4 {
  aspect-ratio: 3 / 4;
}

/* ========== Tabs ========== */
.tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  border-bottom: 1px solid var(--line);
}

.tab {
  appearance: none;
  padding: 12px 20px;
  border: 1px solid transparent;
  border-radius: 10px 10px 0 0;
  margin-bottom: -1px;
  background: transparent;
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s, background 0.2s;
}

.tab:hover {
  color: #fff;
}

.tab[aria-selected="true"] {
  color: #fff;
  border-color: var(--line);
  border-bottom-color: transparent;
  background: rgba(255, 255, 255, 0.03);
}

.tab-panel {
  padding: 24px 0;
  animation: tab-fade 0.25s ease;
}

@keyframes tab-fade {
  from {
    opacity: 0;
    transform: translateY(4px);
  }
}

/* ========== Breadcrumb ========== */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 14px;
  color: var(--text-secondary);
}

.breadcrumb li {
  display: flex;
  align-items: center;
  gap: 8px;
}

.breadcrumb li + li::before {
  content: "/";
  opacity: 0.4;
}

.breadcrumb a:hover {
  color: #fff;
}

[aria-current="page"] {
  color: var(--accent);
}

/* ========== Prose & Table ========== */
.prose {
  max-width: 72ch;
}

.prose p {
  margin-bottom: 1.2em;
  color: var(--text-secondary);
}

.prose h2,
.prose h3 {
  margin-top: 2em;
}

.prose a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.table th {
  text-align: left;
  padding: 12px 14px;
  border-bottom: 1px solid var(--line);
  color: var(--text-secondary);
  font-weight: 500;
}

.table td {
  padding: 14px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

/* ========== Header ========== */
.site-header {
  position: relative;
  z-index: 1000;
}

.site-header::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--accent) 0%, rgba(255, 107, 53, 0.2) 60%, transparent 100%);
  z-index: 2;
}

.site-header__top {
  position: sticky;
  top: 0;
  z-index: 1200;
  display: flex;
  align-items: center;
  min-height: 64px;
  padding: 0 84px 0 20px;
  background: rgba(11, 61, 46, 0.92);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.brand {
  display: inline-flex;
  flex-direction: column;
  gap: 2px;
  line-height: 1.1;
}

.brand__name {
  font-family: var(--font-heading);
  font-size: 24px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: #fff;
}

.brand__sub {
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--accent);
}

@media (max-width: 420px) {
  .brand__sub {
    font-size: 9px;
    letter-spacing: 0.18em;
  }
}

.nav-toggle {
  position: absolute;
  top: 50%;
  right: 60px;
  transform: translateY(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 10px;
  cursor: pointer;
  color: #fff;
}

.nav-toggle__bar {
  display: block;
  width: 20px;
  height: 2px;
  background: currentColor;
  transition: transform 0.3s, opacity 0.3s;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) {
  transform: translateY(8px) 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(-8px) rotate(-45deg);
}

.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 1100;
  width: min(320px, 85vw);
  height: 100vh;
  padding: 84px 0 32px;
  background: linear-gradient(170deg, #0a3327 0%, #072116 100%);
  border-right: 1px solid var(--line);
  overflow-y: auto;
  visibility: hidden;
  transform: translateX(-105%);
  transition: transform 0.35s cubic-bezier(0.22, 1, 0.36, 1), visibility 0s linear 0.4s;
}

.site-nav[data-open] {
  transform: translateX(0);
  visibility: visible;
  transition: transform 0.35s cubic-bezier(0.22, 1, 0.36, 1), visibility 0s;
  box-shadow: 24px 0 60px rgba(0, 0, 0, 0.4);
}

.site-nav__list {
  counter-reset: site-nav;
  display: flex;
  flex-direction: column;
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-nav__list li {
  counter-increment: site-nav;
}

.site-nav__link {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 21px;
  border-left: 3px solid transparent;
  font-size: 15px;
  letter-spacing: 0.05em;
  color: rgba(255, 255, 255, 0.68);
  text-decoration: none;
  transition: background 0.3s, color 0.3s, border-color 0.3s;
}

.site-nav__link::before {
  content: counter(site-nav, decimal-leading-zero);
  min-width: 22px;
  font-size: 11px;
  font-weight: 600;
  color: var(--accent);
  opacity: 0.75;
}

.site-nav__link:hover {
  background: linear-gradient(90deg, rgba(255, 107, 53, 0.08) 0%, transparent 100%);
  color: #fff;
}

.site-nav__link[aria-current="page"] {
  border-left-color: var(--accent);
  background: linear-gradient(90deg, rgba(255, 107, 53, 0.14) 0%, rgba(255, 255, 255, 0.02) 100%);
  color: #fff;
}

.site-header__meta {
  display: none;
}

.site-header__beta {
  margin-top: 12px;
}

.live-status {
  display: flex;
  align-items: center;
  gap: 10px;
}

.live-status__dot {
  width: 7px;
  height: 7px;
  flex: 0 0 auto;
  border-radius: 50%;
  background: var(--success);
  animation: live-pulse 2s infinite;
}

.live-status__text {
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--text-secondary);
}

@keyframes live-pulse {
  0% {
    box-shadow: 0 0 0 0 rgba(52, 199, 123, 0.55);
  }
  70% {
    box-shadow: 0 0 0 8px rgba(52, 199, 123, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(52, 199, 123, 0);
  }
}

.feedback-tab {
  position: fixed;
  top: 0;
  right: 0;
  z-index: 1300;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 170px;
  background: var(--accent);
  color: #13231b;
  font-size: 13px;
  font-weight: 600;
  writing-mode: vertical-rl;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  text-decoration: none;
  border-radius: 0 0 0 10px;
  transition: background 0.3s, width 0.3s;
}

.feedback-tab:hover {
  background: #ff844f;
  width: 54px;
}

.feedback-tab::after {
  content: attr(data-tooltip);
  position: absolute;
  right: 60px;
  top: 20px;
  writing-mode: horizontal-tb;
  background: var(--bg-dark);
  color: #fff;
  font-size: 12px;
  line-height: 1.4;
  white-space: nowrap;
  padding: 8px 14px;
  border: 1px solid var(--line);
  border-radius: 6px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
}

.feedback-tab:hover::after {
  opacity: 1;
}

.feedback-tab__text {
  letter-spacing: 0.3em;
}

/* ========== Scroll progress ========== */
.scroll-bar {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 1500;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--accent) 0%, #ff9b68 100%);
  transform: scaleX(0);
  transform-origin: 0 50%;
  pointer-events: none;
}

/* ========== Skip link ========== */
.skip-link {
  position: fixed;
  top: -80px;
  left: 16px;
  z-index: 1600;
  background: var(--accent);
  color: #13231b;
  padding: 14px 22px;
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  border-radius: 0 0 10px 10px;
  transition: top 0.2s;
}

.skip-link:focus,
.skip-link:focus-visible {
  top: 0;
  outline: none;
}

/* ========== Footer ========== */
.site-footer {
  border-top: 1px solid var(--line);
  background:
    radial-gradient(800px 300px at 15% 0%, rgba(21, 93, 79, 0.45), transparent 70%),
    linear-gradient(180deg, rgba(11, 61, 46, 0.8) 0%, #111 100%);
}

.site-footer__inner {
  display: grid;
  grid-template-columns: 1.8fr 1fr 1fr 1.4fr;
  gap: 48px;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 64px 40px 48px;
}

.site-footer__brand {
  align-self: start;
}

.footer-brand {
  font-family: var(--font-heading);
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.02em;
  color: #fff;
}

.footer-tagline {
  margin-top: 10px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--accent);
}

.footer-desc {
  margin-top: 16px;
  max-width: 44ch;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-secondary);
}

.site-footer__column {
  min-width: 0;
}

.footer-heading {
  margin-bottom: 18px;
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-primary);
}

.footer-links {
  display: grid;
  gap: 12px;
}

.footer-links a {
  display: inline-block;
  color: var(--text-secondary);
  font-size: 14px;
  text-decoration: none;
  transition: color 0.2s, padding-left 0.2s;
}

.footer-links a:hover {
  color: #fff;
  padding-left: 6px;
}

.footer-contact {
  display: grid;
  gap: 14px;
}

.footer-contact li {
  display: grid;
  gap: 2px;
}

.footer-contact span {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: rgba(255, 255, 255, 0.4);
}

.footer-contact strong {
  font-size: 14px;
  font-weight: 500;
  line-height: 1.5;
  color: rgba(255, 255, 255, 0.82);
}

.footer-icp {
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 12px;
  color: rgba(255, 255, 255, 0.5);
}

.site-footer__bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 6px 24px;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 18px 40px 22px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.site-footer__bottom p {
  margin: 0;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.5);
}

@media (max-width: 900px) {
  .site-footer__inner {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 36px;
    padding: 48px 24px 36px;
  }
  .site-footer__brand {
    grid-column: 1 / -1;
  }
  .site-footer__bottom {
    padding-inline: 24px;
  }
}

@media (max-width: 560px) {
  .site-footer__inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 32px;
    padding: 40px 20px 32px;
  }
  .site-footer__brand {
    grid-column: auto;
  }
  .site-footer__bottom {
    align-items: flex-start;
    flex-direction: column;
    padding-inline: 20px;
  }
}

/* ========== Desktop header ========== */
@media (min-width: 1024px) {
  .site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--sidebar-width);
    height: 100vh;
    display: flex;
    flex-direction: column;
    background:
      linear-gradient(180deg, rgba(255, 255, 255, 0.02) 0%, transparent 30%),
      linear-gradient(170deg, #0a3327 0%, #06281d 55%, #03150e 100%);
    border-right: 1px solid var(--line);
    box-shadow: 6px 0 30px rgba(0, 0, 0, 0.18);
  }

  .site-header__top {
    position: static;
    min-height: auto;
    padding: 32px 24px 0;
    background: transparent;
    border-bottom: none;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
  }

  .brand__name {
    font-size: 28px;
  }

  .nav-toggle {
    display: none;
  }

  .site-nav {
    position: static;
    width: auto;
    height: auto;
    padding: 40px 0 0;
    background: transparent;
    border: none;
    overflow: visible;
    visibility: visible;
    transform: none;
    transition: none;
    box-shadow: none;
  }

  .site-nav__link {
    font-size: 15px;
    padding-top: 13px;
    padding-bottom: 13px;
  }

  .site-header__meta {
    display: block;
    margin-top: auto;
    padding: 20px 24px 24px;
    border-top: 1px solid var(--line);
  }
}

/* ========== Reveal ========== */
[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

@media (prefers-reduced-motion: reduce) {
  [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .live-status__dot {
    animation: none;
  }
  .tab-panel {
    animation: none;
  }
}