/* ============================================================
   Modern Dark — Core Design System
   ============================================================ */

/* --- Tokens ----------------------------------------------- */
:root {
  --dp-color-ground:     #050505;
  --dp-color-panel:      #0e0e0e;
  --dp-color-hairline:   #222222;
  --dp-color-hairline-2: #303030;
  --dp-color-bright:     #f2f2f2;
  --dp-color-read:       #a6a9ad;
  --dp-color-meta:       #8a8d91;
  --dp-color-live:       #3fd6c6;
  --dp-color-inverse-ink:#0a0a0a;
  --dp-color-dim:        #96999d;

  --dp-typography-face:  "Geist", "Helvetica Neue", Arial, sans-serif;
  --dp-typography-mono:  "Geist Mono", "SFMono-Regular", Menlo, monospace;

  --dp-spacing-gutter:   48px;
  --dp-spacing-gap:      24px;
  --dp-spacing-max:      1360px;

  --dp-radius-panel:     6px;
  --dp-radius-pill:      999px;

  --dp-border-hairline:  1px;
  --dp-motion-duration:  120ms;
  --dp-motion-ease:      ease-out;

  /* Legacy aliases kept for page-specific CSS compatibility */
  --retro-bg:       var(--dp-color-ground);
  --retro-ink:      var(--dp-color-bright);
  --retro-white:    var(--dp-color-bright);
  --retro-gray:     var(--dp-color-meta);
  --retro-blue:     var(--dp-color-live);
  --retro-navy:     var(--dp-color-live);
  --retro-body:     var(--dp-typography-face);
  --retro-heading:  var(--dp-typography-face);
  --retro-mono:     var(--dp-typography-mono);
  --retro-paper:    var(--dp-color-panel);
}

/* --- Reset & Base ----------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-padding-top: 16px; scroll-behavior: smooth; }

body.retro-site {
  margin: 0;
  color: var(--dp-color-read);
  font: 16px/1.6 var(--dp-typography-face);
  background: var(--dp-color-ground);
  background-image: none;
  min-width: 320px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.retro-site ::selection {
  background: var(--dp-color-live);
  color: var(--dp-color-inverse-ink);
}

.retro-site h1, .retro-site h2, .retro-site h3, .retro-site p { margin-top: 0; }
.retro-site h1, .retro-site h2, .retro-site h3 {
  line-height: 1.1;
  color: var(--dp-color-bright);
  font-weight: 400;
  letter-spacing: -0.02em;
}

.retro-site a {
  color: var(--dp-color-bright);
  text-decoration: none;
  transition: color var(--dp-motion-duration) var(--dp-motion-ease);
}
.retro-site a:visited { color: var(--dp-color-bright); }
.retro-site a:hover { color: var(--dp-color-live); }

.retro-site button, .retro-site input, .retro-site select, .retro-site textarea {
  font: inherit;
  border-radius: 0;
}

.retro-site :focus-visible {
  outline: 2px solid var(--dp-color-live);
  outline-offset: 4px;
}

.retro-site [hidden] { display: none !important; }

/* --- Layout Shell ----------------------------------------- */
.site-shell {
  width: min(var(--dp-spacing-max), calc(100% - var(--dp-spacing-gutter) * 2));
  margin-inline: auto;
}

/* --- Skip Link -------------------------------------------- */
.skip-link {
  position: absolute;
  top: -100px;
  left: 16px;
  padding: 12px 20px;
  background: var(--dp-color-live);
  color: var(--dp-color-inverse-ink);
  font-weight: 600;
  border-radius: var(--dp-radius-pill);
  z-index: 100;
}
.skip-link:focus { top: 12px; }

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0;
  margin: -1px; overflow: hidden; clip: rect(0,0,0,0);
  white-space: nowrap; border: 0;
}

/* --- Header ----------------------------------------------- */
.site-header {
  margin-top: 0;
  background: transparent;
  border: none;
  box-shadow: none;
  padding-top: 16px;
  padding-bottom: 0;
  border-bottom: var(--dp-border-hairline) solid var(--dp-color-hairline);
}

.desktop-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 0 0 12px;
  font: 400 11px/1.5 var(--dp-typography-mono);
  letter-spacing: 0.08em;
  color: var(--dp-color-meta);
  background: none;
  text-transform: uppercase;
}

.masthead {
  padding: 16px 0 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  min-width: 0;
}
.brand:link, .brand:visited { color: var(--dp-color-bright); }
.brand:hover { color: var(--dp-color-live); }

.brand-mark {
  display: grid;
  grid-template-columns: 18px 18px;
  gap: 3px;
  flex-shrink: 0;
  text-align: center;
  font: 600 10px/18px var(--dp-typography-mono);
}
.brand-mark span {
  border: none;
  background: var(--dp-color-hairline-2);
  color: var(--dp-color-bright);
  border-radius: 2px;
}
.brand-mark span:nth-child(1) { background: var(--dp-color-live); color: var(--dp-color-inverse-ink); }
.brand-mark span:nth-child(2) { background: var(--dp-color-bright); color: var(--dp-color-inverse-ink); }
.brand-mark span:nth-child(3) { background: var(--dp-color-hairline-2); }
.brand-mark span:nth-child(4) { background: var(--dp-color-live); color: var(--dp-color-inverse-ink); }

.brand-copy strong {
  display: block;
  font: 500 22px/1.3 var(--dp-typography-face);
  letter-spacing: -0.02em;
  color: var(--dp-color-bright);
}
.brand-copy strong span { color: var(--dp-color-live); }
.brand-copy small {
  display: block;
  font: 400 10px/1.7 var(--dp-typography-mono);
  letter-spacing: 0.06em;
  color: var(--dp-color-meta);
}

.account-links {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
  font-size: 13px;
  color: var(--dp-color-read);
}
.username { max-width: 150px; overflow-wrap: anywhere; }
.header-logout { margin: 0; }
.header-logout .retro-button { min-height: 36px; padding: 8px 16px; }
.login-link { color: var(--dp-color-read); margin-right: 4px; }
.login-link:hover { color: var(--dp-color-bright); }

.user-elo-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--dp-color-hairline);
  color: var(--dp-color-bright);
  font-family: var(--dp-typography-face);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.02em;
  padding: 4px 10px;
  border-radius: var(--dp-radius-button);
  white-space: nowrap;
  transition: all var(--dp-motion-duration) ease;
}
.user-elo-badge.pulse {
  background: rgba(16, 185, 129, 0.2);
  border-color: rgba(16, 185, 129, 0.6);
  color: var(--ui-success);
  box-shadow: 0 0 12px rgba(16, 185, 129, 0.4);
  transform: scale(1.05);
}

/* --- Tab Nav ---------------------------------------------- */
.tab-nav {
  display: flex;
  align-items: stretch;
  padding: 0;
  gap: 0;
  border-bottom: none;
}
.tab-nav > a {
  padding: 12px 18px;
  white-space: nowrap;
  font-weight: 400;
  font-size: 13px;
  letter-spacing: 0.01em;
  border: none;
  color: var(--dp-color-meta);
  background: none;
  box-shadow: none;
  position: relative;
  transition: color var(--dp-motion-duration) var(--dp-motion-ease);
}
.tab-nav > a:hover { color: var(--dp-color-bright); }
.tab-nav > a[aria-current="page"] {
  background: none;
  color: var(--dp-color-bright);
}
.tab-nav > a[aria-current="page"]::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 18px;
  right: 18px;
  height: 2px;
  background: var(--dp-color-live);
  border-radius: 1px;
}
.tab-nav > a:first-child { padding-left: 0; }

.motion-toggle {
  margin-left: auto;
  align-self: center;
  white-space: nowrap;
  background: none;
  border: var(--dp-border-hairline) solid var(--dp-color-hairline);
  box-shadow: none;
  font: 11px var(--dp-typography-mono) !important;
  color: var(--dp-color-meta);
  padding: 5px 12px;
  min-height: 28px;
  cursor: pointer;
  border-radius: var(--dp-radius-pill);
  transition: border-color var(--dp-motion-duration) var(--dp-motion-ease),
              color var(--dp-motion-duration) var(--dp-motion-ease);
}
.motion-toggle:hover { border-color: var(--dp-color-hairline-2); color: var(--dp-color-bright); }
.motion-toggle:active { border-color: var(--dp-color-meta); }

/* --- Buttons ---------------------------------------------- */
.retro-site .retro-button {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  padding: 10px 24px;
  border: var(--dp-border-hairline) solid var(--dp-color-hairline-2);
  box-shadow: none;
  background: transparent;
  color: var(--dp-color-bright);
  font: 400 13px/1.4 var(--dp-typography-face);
  cursor: pointer;
  border-radius: var(--dp-radius-pill);
  transition: background var(--dp-motion-duration) var(--dp-motion-ease),
              border-color var(--dp-motion-duration) var(--dp-motion-ease),
              color var(--dp-motion-duration) var(--dp-motion-ease);
  letter-spacing: 0.01em;
}
.retro-site .retro-button:hover {
  background: var(--dp-color-hairline);
  border-color: var(--dp-color-hairline-2);
  color: var(--dp-color-bright);
  transform: none;
}
.retro-site .retro-button:active {
  border-color: var(--dp-color-meta);
  box-shadow: none;
  transform: none;
}
.retro-site .retro-button.primary {
  background: var(--dp-color-bright);
  color: var(--dp-color-inverse-ink);
  border-color: var(--dp-color-bright);
}
.retro-site .retro-button.primary:hover {
  background: #fff;
  border-color: #fff;
}
.retro-site .retro-button.white {
  background: transparent;
  border-color: var(--dp-color-hairline-2);
}
.retro-site .retro-button.yellow {
  background: var(--dp-color-live);
  color: var(--dp-color-inverse-ink);
  border-color: var(--dp-color-live);
}
.retro-site .retro-button.yellow:hover {
  background: #5de8da;
  border-color: #5de8da;
}
.retro-site .retro-button:disabled {
  cursor: not-allowed;
  opacity: 0.4;
  color: var(--dp-color-meta);
}

/* --- News Ticker ------------------------------------------ */
.news-ticker {
  display: flex;
  margin: 24px 0;
  border: var(--dp-border-hairline) solid var(--dp-color-hairline);
  background: var(--dp-color-panel);
  overflow: hidden;
  font: 400 12px/1.4 var(--dp-typography-mono);
  border-radius: var(--dp-radius-panel);
}
.ticker-label {
  padding: 10px 16px;
  background: var(--dp-color-hairline);
  border-right: var(--dp-border-hairline) solid var(--dp-color-hairline);
  z-index: 1;
  flex-shrink: 0;
  color: var(--dp-color-bright);
  font-weight: 500;
}
.ticker-track {
  display: flex;
  align-items: center;
  min-width: 0;
  overflow: hidden;
}
.ticker-content {
  white-space: nowrap;
  padding-inline: 24px;
  color: var(--dp-color-meta);
  animation: ticker 32s linear infinite;
}
.ticker-content b { color: var(--dp-color-bright); }
.ticker-content em {
  font-style: normal;
  color: var(--dp-color-live);
  margin: 0 24px;
}
.news-ticker:hover .ticker-content { animation-play-state: paused; }
@keyframes ticker { from { transform: translateX(0); } to { transform: translateX(-40%); } }

/* --- Window / Panel --------------------------------------- */
.retro-window {
  padding: 0;
  border: var(--dp-border-hairline) solid var(--dp-color-hairline);
  box-shadow: none;
  background: var(--dp-color-panel);
  border-radius: var(--dp-radius-panel);
  overflow: hidden;
}
.window-title {
  display: flex;
  gap: 12px;
  justify-content: space-between;
  align-items: center;
  padding: 10px 18px;
  background: var(--dp-color-panel);
  border-bottom: var(--dp-border-hairline) solid var(--dp-color-hairline);
  color: var(--dp-color-meta);
  font: 400 12px/1.4 var(--dp-typography-mono);
}
.window-controls {
  display: flex;
  gap: 6px;
}
.window-controls i {
  font: 400 10px/14px var(--dp-typography-mono);
  width: 14px;
  height: 14px;
  text-align: center;
  border: none;
  background: var(--dp-color-hairline);
  color: var(--dp-color-meta);
  font-style: normal;
  border-radius: 50%;
}
.window-body {
  border: none;
  box-shadow: none;
  background: var(--dp-color-panel);
  padding: var(--dp-spacing-gap);
  margin-top: 0;
}

/* --- Hero Clean ------------------------------------------- */
.hero-clean {
  margin: 28px 0 0;
  border: var(--dp-border-hairline) solid var(--dp-color-hairline);
  background: var(--dp-color-panel);
  border-radius: var(--dp-radius-panel);
  overflow: hidden;
  position: relative;
}

.hero-body {
  background: var(--dp-color-panel);
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 48px;
  padding: 56px 48px;
  overflow: hidden;
  position: relative;
  align-items: center;
}
/* Soft white light pool behind hero */
.hero-body::before {
  content: '';
  position: absolute;
  top: -20%;
  right: -10%;
  width: 60%;
  height: 140%;
  background: radial-gradient(ellipse at center, rgba(255,255,255,0.05) 0%, transparent 70%);
  pointer-events: none;
}

.live-signal {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font: 400 11px/1 var(--dp-typography-mono);
  letter-spacing: 0.08em;
  color: var(--dp-color-meta);
  text-transform: uppercase;
  margin-bottom: 24px;
}

.live-dot {
  width: 6px;
  height: 6px;
  background: var(--dp-color-live);
  border-radius: 50%;
  display: inline-block;
}

.hero-copy h1 {
  font: 400 clamp(44px, 5.5vw, 76px)/1.02 var(--dp-typography-face);
  letter-spacing: -0.035em;
  margin: 0 0 20px;
  color: var(--dp-color-bright);
}
.hero-copy h1 span { display: block; }
.hero-copy h1 .headline-dim {
  color: var(--dp-color-dim);
}

.hero-desc {
  max-width: 480px;
  font-size: 15px;
  line-height: 1.65;
  margin-bottom: 32px;
  color: var(--dp-color-read);
}
.hero-desc strong {
  color: var(--dp-color-bright);
  font-weight: 500;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* --- Board Preview Card ----------------------------------- */
.board-preview-card {
  background: var(--dp-color-ground);
  border: var(--dp-border-hairline) solid var(--dp-color-hairline);
  border-radius: var(--dp-radius-panel);
  padding: 24px;
  max-width: 420px;
  margin-inline: auto;
  width: 100%;
}

.board-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font: 400 12px var(--dp-typography-mono);
  color: var(--dp-color-read);
  margin-bottom: 16px;
}

.board-dim {
  color: var(--dp-color-meta);
}

.pixel-board {
  display: grid;
  grid-template-columns: repeat(9, minmax(0, 1fr));
  grid-template-rows: repeat(9, minmax(0, 1fr));
  border: var(--dp-border-hairline) solid var(--dp-color-hairline);
  aspect-ratio: 1;
  background: var(--dp-color-hairline);
  gap: 1px;
  border-radius: 3px;
  overflow: hidden;
}

.pixel-cell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  grid-template-rows: minmax(0, 1fr);
  place-items: center;
  background: var(--dp-color-ground);
  font: 500 11px/1 var(--dp-typography-mono);
  min-width: 0;
  min-height: 0;
  position: relative;
  color: var(--dp-color-meta);
}
.pixel-cell:nth-child(even) { background: var(--ui-surface-soft); }
.pixel-cell.goal { outline: 1px solid var(--dp-color-hairline-2); outline-offset: -2px; }
.pixel-cell span {
  width: 75%;
  height: 75%;
  display: grid;
  place-items: center;
  border-radius: 3px;
}
.pixel-cell.P1 span {
  background: var(--ui-p1-bg);
  color: var(--piece-p1);
  border: 1px solid var(--piece-p1);
}
.pixel-cell.P2 span {
  background: var(--ui-p2-bg);
  color: var(--piece-p2);
  border: 1px solid var(--piece-p2);
}

.board-legend {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  font: 400 11px/1.5 var(--dp-typography-mono);
  color: var(--dp-color-meta);
  margin-top: 14px;
}
.red-ink { color: var(--piece-p1); }
.blue-ink { color: var(--piece-p2); }

/* --- Counter Strip ---------------------------------------- */
.counter-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  margin: var(--dp-spacing-gap) 0 0;
  padding: 0;
  background: none;
  border: var(--dp-border-hairline) solid var(--dp-color-hairline);
  box-shadow: none;
  border-radius: var(--dp-radius-panel);
  overflow: hidden;
}
.counter-item {
  background: var(--dp-color-panel);
  color: var(--dp-color-bright);
  padding: 24px 20px;
  border: none;
  border-right: var(--dp-border-hairline) solid var(--dp-color-hairline);
  font-family: var(--dp-typography-mono);
}
.counter-item:last-child { border-right: none; }
.counter-item strong {
  display: block;
  font-size: 28px;
  font-weight: 400;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--dp-color-bright);
}
.counter-item span {
  display: block;
  color: var(--dp-color-meta);
  font-size: 10px;
  margin-top: 8px;
  letter-spacing: 0.06em;
}

/* --- Section Separator ------------------------------------ */
.groove {
  border: 0;
  height: var(--dp-border-hairline);
  background: var(--dp-color-hairline);
  margin: 56px 0;
}

/* --- Content Section -------------------------------------- */
.content-section {
  background: transparent;
  padding: 0;
  border: none;
  box-shadow: none;
  scroll-margin-top: 16px;
}
.section-heading {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: flex-start;
  margin-bottom: 32px;
}
.section-heading h2 {
  font: 400 clamp(28px, 3.2vw, 40px)/1.1 var(--dp-typography-face);
  letter-spacing: -0.02em;
  margin-bottom: 10px;
  color: var(--dp-color-bright);
}
.section-heading p {
  margin: 0;
  font-size: 15px;
  color: var(--dp-color-read);
}
.section-number {
  font: 400 11px var(--dp-typography-mono);
  padding: 5px 12px;
  border: var(--dp-border-hairline) solid var(--dp-color-hairline);
  background: none;
  white-space: nowrap;
  color: var(--dp-color-meta);
  border-radius: var(--dp-radius-pill);
}

/* --- Rules ------------------------------------------------ */
.rule-layout {
  display: grid;
  grid-template-columns: 1fr 1.35fr;
  gap: var(--dp-spacing-gap);
}

.rule-card {
  background: var(--dp-color-panel);
  border: var(--dp-border-hairline) solid var(--dp-color-hairline);
  border-radius: var(--dp-radius-panel);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.rule-cycle {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  flex: 1;
}
.rule-cycle li {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px 22px;
  border-bottom: var(--dp-border-hairline) solid var(--dp-color-hairline);
  font-weight: 400;
  background: var(--dp-color-panel);
  color: var(--dp-color-bright);
  font-size: 15px;
}
.rule-cycle li:nth-child(2) { background: var(--dp-color-ground); }
.rule-cycle li:last-child { border-bottom: 0; }
.rule-letter {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  background: var(--dp-color-hairline);
  border: none;
  font: 500 14px var(--dp-typography-mono);
  color: var(--dp-color-bright);
  border-radius: var(--dp-radius-panel);
}
.rule-cycle li:nth-child(1) .rule-letter { background: var(--ui-p1-bg); color: var(--piece-p1); border: 1px solid var(--piece-p1); }
.rule-cycle li:nth-child(2) .rule-letter { background: var(--ui-p2-bg); color: var(--piece-p2); border: 1px solid var(--piece-p2); }
.rule-cycle li:nth-child(3) .rule-letter { background: var(--ui-surface-soft); color: var(--dp-color-read); border: 1px solid var(--dp-color-hairline-2); }
.rule-cycle .rule-arrow {
  margin-left: auto;
  font: 18px var(--dp-typography-mono);
  color: var(--dp-color-meta);
}

.rule-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  background: var(--dp-color-panel);
  border: var(--dp-border-hairline) solid var(--dp-color-hairline);
  border-radius: var(--dp-radius-panel);
  overflow: hidden;
}
.rule-table th, .rule-table td {
  text-align: left;
  vertical-align: top;
  padding: 14px 18px;
  border-bottom: var(--dp-border-hairline) solid var(--dp-color-hairline);
  color: var(--dp-color-read);
  line-height: 1.6;
}
.rule-table th {
  width: 26%;
  font-weight: 500;
  color: var(--dp-color-bright);
  white-space: nowrap;
}
.rule-table tr:last-child th,
.rule-table tr:last-child td { border-bottom: none; }
.rule-table tr:nth-child(odd) { background: transparent; }
.rule-table tr:nth-child(even) { background: rgba(255,255,255,0.015); }

.rule-footnote {
  font: 400 12px/1.65 var(--dp-typography-mono);
  background: var(--dp-color-panel);
  padding: 18px 22px;
  margin: var(--dp-spacing-gap) 0 0;
  border: var(--dp-border-hairline) solid var(--dp-color-hairline);
  border-radius: var(--dp-radius-panel);
  color: var(--dp-color-meta);
}
.rule-footnote a { color: var(--dp-color-bright); text-decoration: underline; }
.rule-footnote a:hover { color: var(--dp-color-live); }

/* --- Steps Grid ------------------------------------------- */
.step-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--dp-spacing-gap);
}
.step-card {
  background: var(--dp-color-panel);
  border: var(--dp-border-hairline) solid var(--dp-color-hairline);
  border-radius: var(--dp-radius-panel);
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
}
.step-code {
  font: 500 22px/1 var(--dp-typography-mono);
  color: var(--dp-color-meta);
  margin-bottom: 20px;
  display: block;
}
.step-card h3 {
  font: 500 18px var(--dp-typography-face);
  margin-bottom: 12px;
  color: var(--dp-color-bright);
}
.step-card p {
  font-size: 14px;
  line-height: 1.65;
  margin-bottom: 0;
  color: var(--dp-color-read);
}

/* --- Info Layout ------------------------------------------ */
.info-layout {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: var(--dp-spacing-gap);
}
.info-card {
  background: var(--dp-color-panel);
  border: var(--dp-border-hairline) solid var(--dp-color-hairline);
  border-radius: var(--dp-radius-panel);
  padding: 32px 28px;
}
.info-tag {
  display: inline-block;
  font: 500 11px var(--dp-typography-mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--dp-color-live);
  margin-bottom: 12px;
}
.info-card h3 {
  font: 500 20px var(--dp-typography-face);
  color: var(--dp-color-bright);
  margin-bottom: 12px;
}
.info-card p {
  font-size: 14px;
  line-height: 1.65;
  color: var(--dp-color-read);
  margin-bottom: 12px;
}
.info-link {
  display: inline-block;
  margin-top: 12px;
  font-size: 13px;
  color: var(--dp-color-bright);
  font-weight: 500;
  text-decoration: none;
}
.info-link:hover {
  color: var(--dp-color-live);
}

.faq-card {
  background: var(--dp-color-panel);
  border: var(--dp-border-hairline) solid var(--dp-color-hairline);
  border-radius: var(--dp-radius-panel);
  padding: 32px 28px;
}
.faq-card h3 {
  font: 500 20px var(--dp-typography-face);
  color: var(--dp-color-bright);
  margin-bottom: 18px;
}

/* --- FAQ -------------------------------------------------- */
.faq-list details {
  border-bottom: var(--dp-border-hairline) solid var(--dp-color-hairline);
  background: transparent;
}
.faq-list details:last-child { border-bottom: 0; }
.faq-list summary {
  cursor: pointer;
  padding: 16px 0;
  font-weight: 400;
  font-size: 14px;
  color: var(--dp-color-bright);
  transition: color var(--dp-motion-duration) var(--dp-motion-ease);
}
.faq-list summary:hover { color: var(--dp-color-live); }
.faq-list p {
  padding: 0 0 16px;
  font-size: 13px;
  line-height: 1.6;
  margin: 0;
  color: var(--dp-color-read);
}

/* --- Final CTA -------------------------------------------- */
.final-cta {
  margin-top: 48px;
  background: var(--dp-color-panel);
  padding: 0;
  border: var(--dp-border-hairline) solid var(--dp-color-hairline);
  border-radius: var(--dp-radius-panel);
  overflow: hidden;
  position: relative;
}
/* Subtle white light on closing CTA */
.final-cta::before {
  content: '';
  position: absolute;
  top: -40%;
  right: -20%;
  width: 50%;
  height: 180%;
  background: radial-gradient(ellipse at center, rgba(255,255,255,0.03) 0%, transparent 70%);
  pointer-events: none;
}
.final-cta-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 32px;
  background: none;
  padding: 40px 32px;
  color: var(--dp-color-bright);
  position: relative;
}
.final-cta h2 {
  font: 400 clamp(24px, 3vw, 32px)/1.2 var(--dp-typography-face);
  letter-spacing: -0.02em;
  margin-bottom: 8px;
  color: var(--dp-color-bright);
}
.final-cta p {
  font-size: 14px;
  margin: 0;
  color: var(--dp-color-read);
}
.rainbow {
  color: var(--dp-color-live);
  animation: none;
}

/* --- Footer ----------------------------------------------- */
.site-footer {
  margin-block: 48px 24px;
  background: transparent;
  padding: 24px 0;
  border: none;
  border-top: var(--dp-border-hairline) solid var(--dp-color-hairline);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  font-size: 13px;
  box-shadow: none;
  color: var(--dp-color-meta);
}
.site-footer strong { color: var(--dp-color-bright); font-weight: 500; }
.site-footer p { margin: 6px 0 0; color: var(--dp-color-meta); }
.footer-right {
  display: flex;
  align-items: flex-end;
  flex-direction: column;
  gap: 8px;
  font: 400 11px var(--dp-typography-mono);
  color: var(--dp-color-meta);
}
.footer-right a { color: var(--dp-color-read); }
.footer-right a:hover { color: var(--dp-color-live); }
.palette { display: none; }

/* --- Auth Layout ------------------------------------------ */
.auth-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  margin: 48px 0;
}
.auth-intro {
  background: var(--dp-color-panel);
  padding: 40px;
  border: var(--dp-border-hairline) solid var(--dp-color-hairline);
  border-radius: var(--dp-radius-panel);
}
.auth-intro h1 {
  font: 400 clamp(34px, 4vw, 48px)/1.1 var(--dp-typography-face);
  letter-spacing: -0.03em;
  color: var(--dp-color-bright);
}
.auth-intro p {
  font-size: 15px;
  color: var(--dp-color-read);
}
.auth-intro ul { padding-left: 20px; font-size: 14px; color: var(--dp-color-read); }
.auth-intro li { margin-bottom: 10px; }
.auth-intro .counter-item {
  margin-top: 28px;
  background: var(--dp-color-hairline);
  border: none;
  border-radius: var(--dp-radius-panel);
  padding: 18px;
}
.auth-window { align-self: start; }
.auth-window .window-body { padding: var(--dp-spacing-gap); }
.auth-tabs {
  display: flex;
  gap: 0;
  margin-bottom: 28px;
  border-bottom: var(--dp-border-hairline) solid var(--dp-color-hairline);
}
.auth-tabs a {
  padding: 10px 20px;
  font-size: 14px;
  border: none;
  background: none;
  font-weight: 400;
  color: var(--dp-color-meta);
  transition: color var(--dp-motion-duration) var(--dp-motion-ease);
  position: relative;
}
.auth-tabs a:hover { color: var(--dp-color-bright); }
.auth-tabs a[aria-current="page"] {
  background: none;
  color: var(--dp-color-bright);
}
.auth-tabs a[aria-current="page"]::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 20px;
  right: 20px;
  height: 2px;
  background: var(--dp-color-live);
  border-radius: 1px;
}

/* --- Forms ------------------------------------------------ */
.retro-form label {
  display: block;
  font-weight: 400;
  font-size: 13px;
  margin-bottom: 6px;
  color: var(--dp-color-read);
}
.retro-form input:not([type=hidden]) {
  width: 100%;
  background: var(--dp-color-ground);
  color: var(--dp-color-bright);
  border: var(--dp-border-hairline) solid var(--dp-color-hairline);
  box-shadow: none;
  padding: 12px 14px;
  min-height: 44px;
  font: 16px var(--dp-typography-face);
  margin-bottom: 6px;
  border-radius: var(--dp-radius-panel);
  transition: border-color var(--dp-motion-duration) var(--dp-motion-ease);
}
.retro-form input:not([type=hidden]):focus {
  border-color: var(--dp-color-live);
  outline: none;
}
.form-field { margin-bottom: 20px; }
.form-hint {
  font-size: 12px;
  margin: 4px 0 0;
  color: var(--dp-color-meta);
}
.form-error {
  color: var(--ui-error);
  font-size: 13px;
  margin: 6px 0 0;
}
.form-alert {
  background: rgba(244, 112, 103, 0.08);
  border: var(--dp-border-hairline) solid rgba(244, 112, 103, 0.2);
  padding: 14px;
  color: var(--ui-error);
  font-size: 13px;
  margin-bottom: 20px;
  border-radius: var(--dp-radius-panel);
}
.full-width { width: 100%; }
.auth-disclaimer {
  font-size: 12px;
  margin: 16px 0 0;
  color: var(--dp-color-meta);
}
.guest-form {
  margin-top: 20px;
  padding-top: 20px;
  border-top: var(--dp-border-hairline) solid var(--dp-color-hairline);
}

.contact-email-form { margin: 16px 0; }
.contact-email-form label { display: grid; gap: 8px; max-width: 520px; }
.contact-email-form input {
  padding: 10px;
  min-width: 0;
  max-width: 100%;
  border: var(--dp-border-hairline) solid var(--dp-color-hairline);
  background: var(--dp-color-ground);
  color: var(--dp-color-bright);
  border-radius: var(--dp-radius-panel);
}
.contact-email-form .ops-actions { display: flex; flex-wrap: wrap; gap: 10px; margin: 12px 0; }
.contact-email-form [data-email-status] { font-size: 13px; color: var(--dp-color-live); overflow-wrap: anywhere; }
.contact-email-form [data-email-status][data-error=true] { color: var(--ui-error); }
.team-contact-box { margin-top: 22px; padding-top: 18px; border-top: var(--dp-border-hairline) solid var(--dp-color-hairline); }

/* --- Motion / Reduced Motion ------------------------------ */
body[data-motion="paused"] .ticker-content,
body[data-motion="paused"] .rainbow,
body[data-motion="paused"] .new-badge { animation: none; }
.retro-site[data-motion="paused"] .rainbow { color: var(--dp-color-live); }

@media (prefers-reduced-motion: reduce) {
  .ticker-content, .rainbow, .new-badge { animation: none !important; }
  .rainbow { color: var(--dp-color-live); }
  .ticker-content { white-space: normal; padding: 8px 16px; }
}

/* --- Responsive: 1180px ----------------------------------- */
@media (max-width: 1180px) {
  :root { --dp-spacing-gutter: 32px; }
  .hero-body { gap: 32px; }
}

/* --- Responsive: 900px ------------------------------------ */
@media (max-width: 900px) {
  .hero-body { gap: 24px; padding: 36px 24px; }
  .hero-copy h1 { font-size: clamp(36px, 6vw, 52px); }
  .step-grid { grid-template-columns: repeat(2, 1fr); }
  .rule-layout { grid-template-columns: 1fr; }
  .counter-strip { grid-template-columns: repeat(2, 1fr); }
  .info-layout { grid-template-columns: 1fr 1fr; }
  .auth-layout { gap: 32px; }
}

/* --- Responsive: 850px ------------------------------------ */
@media (max-width: 850px) {
  .masthead { padding: 12px 0; }
  .account-links { gap: 10px; }
  .username { display: none; }
  .tab-nav { overflow-x: auto; -webkit-overflow-scrolling: touch; }
  .tab-nav > a { padding: 10px 14px; }
  .board-window { transform: none; }
}

/* --- Responsive: 640px (narrow) --------------------------- */
@media (max-width: 640px) {
  :root { --dp-spacing-gutter: 16px; }
  .site-header { margin-top: 0; padding-top: 10px; }
  .desktop-bar { font-size: 10px; }
  .masthead {
    flex-wrap: wrap;
    gap: 12px;
  }
  .brand-copy strong { font-size: 20px; }
  .account-links { width: 100%; justify-content: space-between; }
  .tab-nav > a { font-size: 12px; padding: 8px 12px; }
  .hero-body {
    grid-template-columns: 1fr;
    padding: 28px 20px;
    gap: 28px;
  }
  .hero-copy h1 {
    font-size: clamp(36px, 9vw, 52px);
    letter-spacing: -0.02em;
  }
  .hero-copy > p { max-width: none; }
  .hero-actions .retro-button { flex: 1; }
  .board-window { width: min(100%, 340px); justify-self: center; }
  .counter-strip { grid-template-columns: repeat(2, 1fr); }
  .counter-item { padding: 14px; }
  .counter-item strong { font-size: 24px; }
  .groove { margin: 32px 0; }
  .section-heading h2 { font-size: clamp(24px, 6vw, 32px); }
  .section-number { font-size: 10px; }
  .rule-layout,
  .info-layout,
  .step-grid,
  .auth-layout {
    grid-template-columns: 1fr;
  }
  .step-card .window-body { min-height: 0; }
  .step-code {
    float: left;
    font-size: 30px;
    margin: 0 16px 8px 0;
  }
  .step-card h3 { font-size: 17px; }
  .final-cta-inner {
    flex-direction: column;
    align-items: stretch;
    padding: 28px 24px;
  }
  .final-cta h2 { font-size: clamp(22px, 5vw, 28px); }
  .site-footer {
    align-items: flex-start;
    flex-direction: column;
    padding: 20px 0;
    margin-block: 32px 16px;
  }
  .footer-right { align-items: flex-start; }
  .auth-layout { gap: 24px; margin: 28px 0; }
  .auth-intro { padding: 28px; }
  .auth-intro h1 { font-size: clamp(28px, 6vw, 38px); }
  .auth-window .window-body { padding: 20px; }
  .hero-status span { min-width: 120px; }
}