/* =========================================================
   spinbara.css — clean single-source UI layer
   - ONE open system: .is-open on .sb-drawer + .sb-drawer-overlay
   - header dropdown always clickable
   - overlay never blocks clicks when closed
   ========================================================= */

/* =========================
   TOKENS
   ========================= */
:root{
  --sb-bg-0: 230 30% 4%;
  --sb-bg-1: 232 34% 7%;
  --sb-bg-2: 234 40% 10%;

  --sb-surface-0: 0 0% 100% / 0.06;
  --sb-surface-1: 0 0% 100% / 0.10;
  --sb-border:    0 0% 100% / 0.12;

  --sb-text:    230 25% 96%;
  --sb-text-2:  230 20% 86%;
  --sb-text-3:  230 18% 72%;

  --sb-gold:   40 100% 58%;
  --sb-neon:   150 100% 58%;
  --sb-red:    350 92% 60%;

  --sb-primary:   262 95% 62%;
  --sb-primary-2: 278 95% 64%;

  --sb-radius-xl: 22px;
  --sb-radius-lg: 18px;
  --sb-radius-md: 14px;

  --sb-shadow:   0 40px 90px hsl(0 0% 0% / 0.55);
  --sb-shadow-2: 0 18px 60px hsl(0 0% 0% / 0.45);

  --sb-container: 1160px;
  --sb-header-h:  72px;
}

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

body{
  margin: 0;
  color: hsl(var(--sb-text));
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  background:
    radial-gradient(900px 500px at 15% -10%, hsl(var(--sb-primary) / 0.25), transparent 55%),
    radial-gradient(700px 420px at 95% 0%,  hsl(var(--sb-neon) / 0.12),    transparent 55%),
    radial-gradient(900px 700px at 70% 120%, hsl(var(--sb-gold) / 0.10),   transparent 60%),
    linear-gradient(180deg,
      hsl(var(--sb-bg-0)),
      hsl(var(--sb-bg-1)) 40%,
      hsl(var(--sb-bg-0))
    );
}

:focus-visible{
  outline: 2px solid hsl(var(--sb-neon) / 0.65);
  outline-offset: 3px;
  border-radius: 12px;
}

@media (prefers-reduced-motion: reduce){
  *{ animation: none !important; transition: none !important; scroll-behavior: auto !important; }
}

/* =========================
   LAYOUT
   ========================= */
.sb-container{
  width: min(100% - 32px, var(--sb-container));
  margin-inline: auto;
}

.sb-section{ padding: 54px 0; }

@media (max-width: 768px){
  .sb-container{ width: min(100% - 22px, var(--sb-container)); }
  .sb-section{ padding: 42px 0; }
}

/* =========================
   PANELS / CARDS
   ========================= */
.sb-panel{
  background: hsl(var(--sb-surface-0));
  border: 1px solid hsl(var(--sb-border));
  border-radius: var(--sb-radius-xl);
  box-shadow: var(--sb-shadow-2);
  backdrop-filter: blur(12px);
}

.sb-panel-pad{ padding: 20px; }

@media (max-width: 768px){
  .sb-panel-pad{ padding: 16px; }
}

/* =========================
   TYPO
   ========================= */
.sb-h1{
  font-family: "DM Serif Display", serif;
  font-weight: 400;
  line-height: 1.06;
  letter-spacing: 0.2px;
  font-size: 44px;
  margin: 0;
}

@media (max-width: 992px){
  .sb-h1{ font-size: 34px; }
}

.sb-lead{
  margin: 0;
  color: hsl(var(--sb-text-2));
  font-size: 16px;
  line-height: 1.7;
}

.sb-muted{ color: hsl(var(--sb-text-3)); }

/* =========================
   BUTTONS
   ========================= */
.sb-btn{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 18px;
  border-radius: 16px;
  border: 1px solid hsl(var(--sb-border));
  text-decoration: none;
  font-weight: 800;
  letter-spacing: 0.2px;
  transition: transform .18s ease, filter .18s ease, box-shadow .18s ease, border-color .18s ease;
  will-change: transform;
  user-select: none;
}

.sb-btn-primary{
  background:
    linear-gradient(135deg,
      hsl(var(--sb-primary)) 0%,
      hsl(var(--sb-primary-2)) 40%,
      hsl(var(--sb-gold)) 120%
    );
  color: hsl(0 0% 8%);
  border-color: hsl(var(--sb-primary) / 0.45);
  box-shadow: 0 18px 40px hsl(var(--sb-primary) / 0.25);
}

.sb-btn:hover{ transform: translateY(-2px); filter: brightness(1.03); }
.sb-btn:active{ transform: translateY(0); }

/* =========================
   CHIPS
   ========================= */
.sb-chip{
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 12px;
  border-radius: 999px;
  border: 1px solid hsl(var(--sb-border));
  background: hsl(var(--sb-surface-0));
  color: hsl(var(--sb-text-2));
  font-size: 13px;
  line-height: 1;
  white-space: nowrap;
}

.sb-chip i{ color: hsl(var(--sb-gold)); }

/* =========================================================
   HEADER (ALWAYS CLICKABLE)
   ========================================================= */
.sb-header{
  position: sticky;
  top: 0;
  z-index: 9000;          /* high, stable */
  isolation: isolate;     /* prevents backdrop stacking weirdness */
  background: hsl(var(--sb-bg-0) / 0.55);
  border-bottom: 1px solid hsl(var(--sb-border));
  backdrop-filter: blur(16px);
  overflow: visible;      /* dropdown can overflow */
}

.sb-header .sb-container,
.sb-header-row{ overflow: visible; }

.sb-header-row{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 0;
  min-height: var(--sb-header-h);
}

.sb-logo img{
  max-width: 100%;
  height: auto;
  display: block;
}

/* Desktop nav */
.sb-nav{
  display: flex;
  align-items: center;
  gap: 14px;
}

.sb-nav a{
  color: hsl(var(--sb-text-2));
  text-decoration: none;
  font-weight: 800;
  font-size: 14px;
  padding: 10px 12px;
  border-radius: 14px;
  border: 1px solid transparent;
  transition: background .18s ease, border-color .18s ease, transform .18s ease;
}

.sb-nav a:hover{
  background: hsl(var(--sb-surface-0));
  border-color: hsl(var(--sb-border));
  transform: translateY(-1px);
}

/* =========================================================
   LANGUAGE DROPDOWN (DESKTOP)
   ========================================================= */
.sb-lang-dd{
  position: relative;
  display: inline-flex;
  align-items: center;
  z-index: 1; /* within header stacking context */
}

.sb-lang-dd-btn{
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 12px;
  border-radius: 999px;
  background: hsl(var(--sb-surface-0));
  border: 1px solid hsl(var(--sb-border));
  color: hsl(var(--sb-text));
  font-weight: 900;
  line-height: 1;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  position: relative;
  z-index: 2;
}

.sb-lang-dd-btn .chev{ opacity: .85; font-weight: 900; }

.sb-lang-dd-menu{
  position: absolute;
  top: calc(100% + 10px);
  right: 0;
  z-index: 9999; /* above header content */
  min-width: 220px;
  padding: 10px;
  border-radius: 16px;
  border: 1px solid hsl(var(--sb-border));
  background: hsl(var(--sb-bg-1));
  box-shadow: var(--sb-shadow);
  display: none;
}

.sb-lang-dd.is-open .sb-lang-dd-menu{ display: block; }

.sb-lang-dd-menu a{
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 12px;
  border-radius: 12px;
  text-decoration: none;
  color: hsl(var(--sb-text));
  font-weight: 900;
}

.sb-lang-dd-menu a:hover{ background: hsl(var(--sb-surface-0)); }

.sb-lang-dd-badge{
  font-size: 12px;
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid hsl(var(--sb-border));
  background: hsl(var(--sb-surface-0));
  color: hsl(var(--sb-text-2));
}

.sb-lang-dd-menu a.is-active{
  background: hsl(var(--sb-primary) / 0.20);
  border: 1px solid hsl(var(--sb-primary) / 0.35);
}

.sb-lang-dd-menu a.is-active .sb-lang-dd-badge{
  border-color: hsl(var(--sb-primary) / 0.35);
  color: hsl(var(--sb-text));
}

/* =========================================================
   BURGER (MOBILE)
   ========================================================= */
.sb-burger{
  display: none;
  width: 44px;
  height: 44px;
  border-radius: 14px;
  border: 1px solid hsl(var(--sb-border));
  background: hsl(var(--sb-surface-0));
  align-items: center;
  justify-content: center;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

.sb-burger span,
.sb-burger span::before,
.sb-burger span::after{
  content: "";
  display: block;
  width: 18px;
  height: 2px;
  background: hsl(var(--sb-text));
  border-radius: 2px;
  position: relative;
}

.sb-burger span::before{ position: absolute; top: -6px; left: 0; }
.sb-burger span::after{ position: absolute; top:  6px; left: 0; }

/* =========================================================
   DRAWER + OVERLAY (ONLY .is-open)
   - overlay is inert when closed
   - drawer doesn't trap clicks when closed
   ========================================================= */
.sb-drawer-overlay{
  position: fixed;
  inset: 0;
  z-index: 9500; /* below drawer, above everything */
  background: hsl(0 0% 0% / 0.55);
  opacity: 0;
  visibility: hidden;
  pointer-events: none; /* critical */
  transition: opacity .2s ease, visibility .2s ease;
}

.sb-drawer-overlay.is-open{
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.sb-drawer{
  position: fixed;
  top: 0;
  right: 0;
  z-index: 9600;

  width: min(92vw, 360px);
  height: 100%;
  padding: 16px;

  background: linear-gradient(180deg, hsl(var(--sb-bg-1)), hsl(var(--sb-bg-0)));
  border-left: 1px solid hsl(var(--sb-border));
  box-shadow: var(--sb-shadow);

  transform: translateX(105%);
  transition: transform .22s ease;

  display: flex;
  flex-direction: column;
  gap: 14px;

  pointer-events: none; /* critical */
}

.sb-drawer.is-open{
  transform: translateX(0);
  pointer-events: auto;
}

.sb-drawer-top{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.sb-drawer-close{
  width: 44px;
  height: 44px;
  border-radius: 14px;
  border: 1px solid hsl(var(--sb-border));
  background: hsl(var(--sb-surface-0));
  color: hsl(var(--sb-text));
  cursor: pointer;
  font-size: 18px;
  line-height: 1;
}

.sb-drawer nav a{
  display: block;
  padding: 12px 12px;
  border-radius: 16px;
  border: 1px solid hsl(var(--sb-border));
  background: hsl(var(--sb-surface-0));
  color: hsl(var(--sb-text-2));
  text-decoration: none;
  font-weight: 900;
}

.sb-drawer nav a:hover{ background: hsl(var(--sb-surface-1)); }

.sb-drawer-cta{ margin-top: auto; }

/* Mobile language block */
.sb-lang-mobile-dd{ margin-top: 10px; }

.sb-lang-mobile-btn{
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 12px 14px;
  border-radius: 14px;
  background: hsl(var(--sb-surface-0));
  border: 1px solid hsl(var(--sb-border));
  color: hsl(var(--sb-text));
  font-weight: 900;
  cursor: pointer;
}

.sb-lang-mobile-menu{ display: none; margin-top: 10px; }
.sb-lang-mobile-menu.is-open{ display: grid; gap: 10px; }

/* Scroll lock when JS adds .sb-lock to <html> */
html.sb-lock,
html.sb-lock body{
  overflow: hidden;
}

/* Responsive header controls */
@media (max-width: 992px){
  .sb-nav{ display: none; }
  .sb-lang-dd{ display: none; }
  .sb-burger{ display: inline-flex; }
}

/* =========================================================
   HERO
   ========================================================= */
.sb-hero{
  position: relative;
  min-height: 300px;
  background-size: cover !important;
  background-position: center center !important;
  background-repeat: no-repeat !important;
  overflow: hidden;
}

@media (max-width: 768px){
  .sb-hero{
    min-height: 220px;
    background-position: center top !important;
  }
}

/* hero overlay must never eat clicks */
.sb-hero::before{
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(700px 420px at 20% 10%, hsl(var(--sb-primary) / 0.25), transparent 55%),
    linear-gradient(180deg, hsl(0 0% 0% / 0.50), hsl(0 0% 0% / 0.72));
}

.sb-hero-inner{ position: relative; padding: 34px 0 26px; }

.sb-hero-grid{
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 18px;
  align-items: end;
}

@media (max-width: 992px){
  .sb-hero-grid{ grid-template-columns: 1fr; }
}

.sb-hero-media{
  border-radius: var(--sb-radius-xl);
  overflow: hidden;
  border: 1px solid hsl(var(--sb-border));
  background: hsl(var(--sb-surface-0));
  box-shadow: var(--sb-shadow-2);
}

.sb-hero-media img{
  width: 100%;
  height: 100%;
  display: block;
  max-width: 100%;
  object-fit: cover;
  object-position: center center;
}

.sb-hero-ctas{
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}

.sb-hero-chips{
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 14px;
}

/* =========================================================
   TOC + ANCHORS
   ========================================================= */
.sb-toc{
  margin-top: -26px;
  position: relative;
  z-index: 1;
}

.sb-toc h2{
  font-size: 16px;
  margin: 0 0 8px 0;
  letter-spacing: 0.2px;
}

.sb-toc ul{ margin: 0; padding-left: 18px; }

.sb-toc a{
  color: hsl(var(--sb-text-2));
  text-decoration: none;
}

.sb-toc a:hover{
  color: hsl(var(--sb-text));
  text-decoration: underline;
}

.scroll-mt-20{ scroll-margin-top: var(--sb-header-h); }

/* =========================================================
   SECTION HEAD + CONTRAST
   ========================================================= */
.sb-section-head{
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 14px;
  align-items: end;
  margin-bottom: 18px;
}

.sb-section-title{
  font-size: 22px;
  margin: 0;
  line-height: 1.15;
  letter-spacing: 0.2px;
}

@media (max-width: 768px){
  .sb-section-head{ grid-template-columns: 1fr; }
  .sb-section-title{ font-size: 20px; }
}

.sb-section-contrast{
  background: linear-gradient(180deg, transparent, hsl(var(--sb-bg-2) / 0.75), transparent);
  border-top: 1px solid hsl(var(--sb-border));
  border-bottom: 1px solid hsl(var(--sb-border));
}

/* =========================================================
   TABLE (optional)
   ========================================================= */
.sb-table-wrap{
  overflow: auto;
  border-radius: 18px;
  border: 1px solid hsl(var(--sb-border));
}

.sb-table{
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  min-width: 780px;
  background: hsl(var(--sb-bg-1));
}

.sb-table th,
.sb-table td{
  padding: 14px;
  border-bottom: 1px solid hsl(var(--sb-border));
  vertical-align: top;
}

.sb-table th{
  font-size: 12px;
  letter-spacing: 0.4px;
  text-transform: uppercase;
  color: hsl(var(--sb-text-3));
  font-weight: 900;
  background: hsl(var(--sb-bg-2));
  position: sticky;
  top: 0;
}

.sb-table td{
  color: hsl(var(--sb-text-2));
  line-height: 1.7;
  font-weight: 900;
}

.sb-table td strong{ color: hsl(var(--sb-text)); font-weight: 900; }

/* =========================================================
   FOOTER
   ========================================================= */
.sb-footer{
  border-top: 1px solid hsl(var(--sb-border));
  background:
    radial-gradient(700px 420px at 15% 0%, hsl(var(--sb-primary) / 0.10), transparent 55%),
    linear-gradient(180deg, hsl(var(--sb-bg-1)), hsl(var(--sb-bg-0)));
  padding: 42px 0 18px;
}

.sb-footer-top{
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 18px;
}

.sb-footer-links{
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.sb-footer-links a{
  color: hsl(var(--sb-text-2));
  text-decoration: none;
  font-weight: 900;
  font-size: 13px;
  padding: 10px 12px;
  border-radius: 14px;
  border: 1px solid hsl(var(--sb-border));
  background: hsl(var(--sb-surface-0));
}

.sb-footer-links a:hover{ background: hsl(var(--sb-surface-1)); }

.sb-footer-grid{
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-top: 14px;
}

@media (max-width: 768px){
  .sb-footer-grid{ grid-template-columns: 1fr; }
}

.sb-footer-bottom{
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px solid hsl(var(--sb-border));
  color: hsl(var(--sb-text-3));
  text-align: center;
  font-size: 13px;
}

/* =========================================================
   BACK TO TOP (matches your HTML: .back-to-top)
   ========================================================= */
.back-to-top{
  position: fixed;
  right: 16px;
  bottom: 16px;
  z-index: 8800; /* below overlay/drawer, above content */

  width: 46px;
  height: 46px;
  border-radius: 16px;

  border: 1px solid hsl(var(--sb-border));
  background: linear-gradient(135deg,
    hsl(var(--sb-primary) / 0.75),
    hsl(var(--sb-gold) / 0.55)
  );

  color: hsl(0 0% 10%);
  font-weight: 900;

  cursor: pointer;
  box-shadow: var(--sb-shadow-2);

  opacity: 0;
  transform: translateY(10px);
  pointer-events: none;

  transition: opacity .2s ease, transform .2s ease, filter .2s ease;
}

.back-to-top.is-visible{
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.back-to-top:hover{ filter: brightness(1.04); }

/* =========================
   Scroll to top button
   ========================= */

.sb-top {
  position: fixed;
  right: 20px;
  bottom: 24px;

  width: 52px;
  height: 52px;
  border-radius: 50%;

  display: flex;
  align-items: center;
  justify-content: center;

  background: hsl(var(--sb-primary));
  color: #fff;
  font-size: 22px;
  font-weight: 900;
  line-height: 1;

  border: none;
  cursor: pointer;

  box-shadow:
    0 10px 25px rgba(0,0,0,.25),
    inset 0 -2px 0 rgba(0,0,0,.25);

  opacity: 0;
  transform: translateY(12px) scale(.9);
  pointer-events: none;

  transition:
    opacity .25s ease,
    transform .25s ease,
    box-shadow .25s ease;

  z-index: 1000;
}

/* visible state (used by JS) */
.sb-top.is-visible {
  opacity: 1;
  transform: translateY(0) scale(1);
  pointer-events: auto;
}

/* hover / active */
.sb-top:hover {
  transform: translateY(-2px) scale(1.05);
  box-shadow:
    0 14px 32px rgba(0,0,0,.35),
    inset 0 -2px 0 rgba(0,0,0,.25);
}

.sb-top:active {
  transform: scale(.96);
}

/* mobile tweak */
@media (max-width: 768px) {
  .sb-top {
    right: 14px;
    bottom: 18px;
    width: 46px;
    height: 46px;
    font-size: 20px;
  }
}
/* 2 cards grid -> mobile stack */
.sb-grid-2{
  display: grid;
  grid-template-columns: .95fr 1.05fr;
  gap: 14px;
}

@media (max-width: 992px){
  .sb-grid-2{
    grid-template-columns: 1fr; /* cards one under another */
  }
}