/* ==========================================================================
   LANDING: site chrome
   The header and footer that every page shares. The header keeps the four
   top-level items from the home page; the rest of the site hangs off them
   in drop panels, so an eighteen-page site still reads as a four-item nav.
   Below 900px the whole thing collapses into a drawer.
   ========================================================================== */

/* ---- Header shell ------------------------------------------------------- */

.hdr {
  position: sticky;
  top: 14px;
  z-index: var(--z-header);
  padding: 0 var(--gutter);
}

.hdr-bar {
  position: relative;
  max-width: var(--measure);
  margin: 0 auto;
  /* The left padding is the page gutter, so the logo sits on the same
     vertical line as every heading below it. */
  padding: 10px 12px 10px var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-5);
  box-sizing: border-box;
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-radius: var(--radius-pill);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
  background: rgba(11, 13, 18, 0.72);
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
}

.hdr-logo {
  display: flex;
  align-items: center;
  gap: 14px;
  flex: 0 0 auto;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 20px;
  letter-spacing: 0.22em;
  color: var(--text);
}

.hdr-logo:hover { color: var(--text); }

/* The pad under the logo mark lights up on hover, the same tell the
   home page uses when a lander touches down. */
.hdr-logo:hover .hdr-pad-dot { animation: padpulse 1.4s var(--ease-soft) infinite; }

@keyframes padpulse {
  0%, 100% { opacity: 1; translate: 0 0; }
  50%      { opacity: 0.7; translate: 0 2px; }
}

/* ---- Primary nav -------------------------------------------------------- */

.hdr-nav {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  font-size: 15px;
  font-weight: 500;
}

.hdr-item { position: relative; }

/* A top-level entry is a button when it owns a panel, a link when it
   doesn't. Both need to look identical. */
.hdr-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 2px;
  border: 0;
  background: none;
  font: inherit;
  color: var(--text-2);
  cursor: pointer;
  transition: color var(--dur-fast) var(--ease);
}

.hdr-link:hover,
.hdr-link[aria-expanded='true'] { color: var(--text); }

/* Underline that grows from the left, matching the home page's link tell. */
.hdr-link::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: 2px;
  height: 1.5px;
  background: var(--accent);
  scale: 0 1;
  transform-origin: left;
  transition: scale var(--dur-fast) var(--ease);
}

.hdr-link:hover::after,
.hdr-link[aria-expanded='true']::after,
.hdr-item[data-current] .hdr-link::after { scale: 1 1; }

.hdr-item[data-current] .hdr-link { color: var(--text); }

.hdr-caret {
  width: 9px;
  height: 9px;
  transition: rotate var(--dur-fast) var(--ease);
  opacity: 0.6;
}

.hdr-link[aria-expanded='true'] .hdr-caret { rotate: 180deg; opacity: 1; }

/* ---- Drop panels -------------------------------------------------------- */

.hdr-panel {
  position: absolute;
  top: calc(100% + 18px);
  left: 50%;
  translate: -50% 0;
  min-width: 290px;
  padding: var(--space-4);
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-radius: var(--radius-lg);
  background: rgba(11, 13, 18, 0.94);
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
  box-shadow: var(--shadow-lg);
  display: grid;
  gap: 2px;

  /* Hidden by default without leaving the tab order full of invisible
     links: visibility flips with the animation. */
  opacity: 0;
  visibility: hidden;
  translate: -50% -8px;
  transition: opacity var(--dur-fast) var(--ease),
              translate var(--dur-fast) var(--ease),
              visibility 0s linear var(--dur-fast);
}

.hdr-item[data-open] .hdr-panel {
  opacity: 1;
  visibility: visible;
  translate: -50% 0;
  transition-delay: 0s;
}

/* A small notch pointing back at the item that opened it. */
.hdr-panel::before {
  content: '';
  position: absolute;
  top: -5px;
  left: 50%;
  width: 10px;
  height: 10px;
  translate: -50% 0;
  rotate: 45deg;
  background: rgba(11, 13, 18, 0.94);
  border-left: 1px solid rgba(255, 255, 255, 0.09);
  border-top: 1px solid rgba(255, 255, 255, 0.09);
}

.hdr-panel a {
  display: grid;
  gap: 2px;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-sm);
  color: var(--text-2);
  transition: background var(--dur-instant) var(--ease),
              color var(--dur-instant) var(--ease);
}

.hdr-panel a:hover,
.hdr-panel a:focus-visible {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text);
}

.hdr-panel a[aria-current='page'] { color: var(--accent); }

.hdr-panel b { font-weight: 500; font-size: 15px; }

.hdr-panel span {
  font-size: var(--step--2);
  color: var(--text-muted);
  font-family: var(--font-mono);
  letter-spacing: 0.02em;
}

.hdr-panel hr {
  border: 0;
  border-top: 1px solid var(--line);
  margin: var(--space-3) var(--space-4);
}

/* ---- Buttons in the bar ------------------------------------------------- */

.hdr-cta {
  display: inline-flex;
  align-items: center;
  flex: 0 0 auto;
  min-height: 42px;
  padding: 0 24px;
  border-radius: var(--radius-pill);
  background: var(--accent);
  color: var(--ground);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 15px;
  box-shadow: var(--glow-accent);
  transition: translate var(--dur-fast) var(--ease),
              box-shadow var(--dur-fast) var(--ease);
}

.hdr-cta:hover {
  color: var(--ground);
  translate: 0 -2px;
  box-shadow: 0 0 40px -4px rgba(255, 196, 79, 0.6);
}


/* ---- Drawer toggle (hidden above 900px) --------------------------------- */

.hdr-burger {
  display: none;
  flex: 0 0 auto;
  width: 42px;
  height: 42px;
  padding: 0;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  background: none;
  cursor: pointer;
  place-items: center;
}

.hdr-burger span {
  display: block;
  width: 16px;
  height: 1.5px;
  background: var(--text);
  transition: translate var(--dur-fast) var(--ease),
              rotate var(--dur-fast) var(--ease),
              opacity var(--dur-instant) var(--ease);
}

.hdr-burger span + span { margin-top: 4px; }

[data-drawer-open] .hdr-burger span:nth-child(1) { translate: 0 5.5px; rotate: 45deg; }
[data-drawer-open] .hdr-burger span:nth-child(2) { opacity: 0; }
[data-drawer-open] .hdr-burger span:nth-child(3) { translate: 0 -5.5px; rotate: -45deg; }

/* ---- Drawer ------------------------------------------------------------- */

.drawer {
  position: fixed;
  inset: 0;
  z-index: var(--z-modal);
  display: none;
  padding: 92px var(--gutter) var(--space-8);
  overflow-y: auto;
  background: rgba(7, 8, 11, 0.97);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}

[data-drawer-open] .drawer { display: block; }
[data-drawer-open] { overflow: hidden; }

/* The drawer sits at modal level, so the header has to come above it or
   the button that closes it ends up underneath the thing it opened. */
[data-drawer-open] .hdr { z-index: calc(var(--z-modal) + 1); }

/* The drawer sits at modal level, so the header has to come above it or
   the button that closes it ends up underneath the thing it opened. */
[data-drawer-open] .hdr { z-index: calc(var(--z-modal) + 1); }

.drawer-group { border-top: 1px solid var(--line); padding: var(--space-5) 0; }
.drawer-group:first-child { border-top: 0; }

.drawer-group h2 {
  margin: 0 0 var(--space-4);
  font-family: var(--font-mono);
  font-size: var(--step--2);
  font-weight: 500;
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
  color: var(--accent);
}

.drawer-group a {
  display: block;
  padding: var(--space-3) 0;
  font-family: var(--font-display);
  font-size: var(--step-1);
  color: var(--text-2);
  animation: drawerin 0.4s var(--ease) calc(var(--i, 0) * 28ms) backwards;
}

.drawer-group a:hover,
.drawer-group a[aria-current='page'] { color: var(--accent); }

@keyframes drawerin {
  from { opacity: 0; translate: 0 10px; }
  to   { opacity: 1; translate: 0 0; }
}

.drawer-cta {
  display: flex;
  justify-content: center;
  min-height: 52px;
  align-items: center;
  margin-top: var(--space-6);
  border-radius: var(--radius-pill);
  background: var(--accent);
  color: var(--ground);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--step-1);
}

.drawer-cta:hover { color: var(--ground); }

@media (max-width: 900px) {
  .hdr-nav { display: none; }
  .hdr-burger { display: grid; }
  /* On a phone the pill already sits inside the page gutter, so it
     takes a smaller inner padding of its own. */
  .hdr-bar { padding: 9px 9px 9px 18px; }
  .hdr-logo { font-size: 17px; }
  .hdr-logo svg { width: 34px; height: 29px; }
}

/* Above 900px the drawer never shows, even if its flag was left set by a
   resize mid-session. */
@media (min-width: 901px) {
  .drawer { display: none !important; }
}

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

.ftr {
  position: relative;
  z-index: var(--z-content);
  margin-top: var(--space-12);
  border-top: 1px solid var(--line);
  padding: var(--space-10) 0 var(--space-7);
  background: linear-gradient(180deg, transparent, rgba(5, 6, 10, 0.6));
}

.ftr-top {
  display: grid;
  gap: var(--space-8) var(--space-6);
  padding-bottom: var(--space-8);
}

/* The brand block and the link columns are laid out separately, because
   mixing a wide first track with repeat(auto-fit, ...) lets the tracks
   overlap once the viewport is narrower than their combined minimum. */
.ftr-links {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-7) var(--space-5);
}

@media (min-width: 620px) {
  .ftr-links { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (min-width: 940px) {
  .ftr-top { grid-template-columns: minmax(230px, 1fr) 2.5fr; }
  .ftr-links { grid-template-columns: repeat(5, minmax(0, 1fr)); }
}

.ftr-mark {
  display: grid;
  gap: var(--space-4);
  align-content: start;
  justify-items: start;
  max-width: 36ch;
}

.ftr-mark .hdr-logo { font-size: 22px; }

.ftr-mark p { margin: 0; font-size: var(--step--1); color: var(--text-muted); }

.ftr-col h2 {
  margin: 0 0 var(--space-4);
  font-family: var(--font-mono);
  font-size: var(--step--2);
  font-weight: 500;
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
  color: var(--text-muted);
}

.ftr-col ul { margin: 0; padding: 0; list-style: none; display: grid; gap: var(--space-3); }

.ftr-col a {
  font-size: var(--step--1);
  color: var(--text-3);
  transition: color var(--dur-instant) var(--ease);
}

.ftr-col a:hover { color: var(--accent); }

.ftr-base {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--space-3) var(--space-6);
  padding-top: var(--space-6);
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: var(--step--2);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.ftr-risk {
  margin: var(--space-5) 0 0;
  font-size: var(--step--1);
  color: var(--text-muted);
  max-width: 80ch;
}

@media (prefers-reduced-motion: reduce) {
  .drawer-group a,
  .hdr-logo:hover .hdr-pad-dot { animation: none !important; opacity: 1 !important; translate: none !important; }
}