/* Floating Controls — portable hamburger quick-links menu.
   Drop this file + floating-controls.js into any project and include both:
     <link rel="stylesheet" href="floating-controls/floating-controls.css">
     <script src="floating-controls/floating-controls.js" defer></script>
   No build step, no framework. See demo.html for a working example. */

/* Icon color follows prefers-color-scheme directly rather than inheriting currentColor —
   the host page's own text color isn't guaranteed to track its theme, so relying on
   inheritance risks black-on-black (or white-on-white) icons. Override with
   --fc-icon-color on :root if a project wants a fixed color instead. */
:root { --fc-icon-color-auto: #14161c; }
@media (prefers-color-scheme: dark) {
  :root { --fc-icon-color-auto: #f5f5f4; }
}

.fc-controls {
  position: fixed;
  top: var(--fc-offset-top, 30px);
  right: var(--fc-offset-right, 30px);
  display: flex;
  align-items: center;
  gap: var(--fc-gap, 20px);
  z-index: var(--fc-z, 9999);
  color: #fff;
  transition: color 0.3s ease;
}

.fc-btn {
  width: 32px;
  height: 32px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: none;
  border: none;
  padding: 0;
  color: inherit;
  cursor: pointer;
  transition: opacity 0.15s ease, transform 0.1s ease;
}
.fc-btn:hover { opacity: 0.7; }
.fc-btn:active { transform: scale(0.9); }
.fc-btn:focus-visible {
  outline: 2px solid var(--fc-accent, #34d399);
  outline-offset: 2px;
  border-radius: 4px;
}

/* hamburger, morphs into a close mark when open */
.fc-menu-btn { flex-direction: column; gap: 5px; }
.fc-line {
  display: block;
  width: 22px;
  height: 1px;
  border-radius: 1px;
  background: currentColor;
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.2s ease;
}
.fc-menu-btn.fc-open .fc-line-1 { transform: translateY(6px) rotate(45deg); }
.fc-menu-btn.fc-open .fc-line-2 { opacity: 0; }
.fc-menu-btn.fc-open .fc-line-3 { transform: translateY(-6px) rotate(-45deg); }

/* dark blurred scrim behind the open menu */
.fc-overlay {
  position: fixed;
  inset: 0;
  background: var(--fc-overlay-bg, rgba(6, 9, 14, 0.32));
  -webkit-backdrop-filter: blur(var(--fc-overlay-blur, 7px));
  backdrop-filter: blur(var(--fc-overlay-blur, 7px));
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
  z-index: calc(var(--fc-z, 9999) - 5);
}
.fc-overlay.fc-open { opacity: 1; pointer-events: auto; }

/* menu: no card chrome — a vertically expanding stack of items over the scrim */
.fc-menu {
  position: fixed;
  top: calc(var(--fc-offset-top, 16px) + 50px);
  right: var(--fc-offset-right, 16px);
  width: var(--fc-menu-width, 250px);
  z-index: var(--fc-z, 9999);
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.38s cubic-bezier(0.4, 0, 0.2, 1);
}
.fc-menu.fc-open { grid-template-rows: 1fr; }
.fc-menu-inner { overflow: hidden; min-height: 0; }
.fc-menu-list { display: flex; flex-direction: column; padding-top: 4px; }

.fc-menu-item {
  display: flex;
  align-items: center;
  gap: 15px;
  padding: 12px 2px;
  color: var(--fc-menu-text, rgba(255, 255, 255, 0.88));
  text-decoration: none;
  font-family: var(--fc-menu-font, 'Roboto', system-ui, sans-serif);
  font-size: var(--fc-menu-font-size, 18px);
  font-weight: var(--fc-menu-font-weight, 100);
  cursor: pointer;
  border: none;
  background: none;
  text-align: left;
  width: 100%;
  transition: color 0.15s ease, transform 0.15s ease;
}
.fc-menu-item:hover { color: var(--fc-menu-text-hover, #fff); transform: translateX(3px); }
.fc-menu-item:focus-visible { outline: 2px solid #fff; outline-offset: 2px; border-radius: 4px; }

.fc-menu-icon { width: 17px; height: 17px; flex-shrink: 0; display: flex; align-items: center; justify-content: center; }
.fc-menu-icon svg { width: 16px; height: 16px; }
.fc-menu-icon.fc-deva { font-size: 14px; font-weight: 700; line-height: 1; }
.fc-menu-label { flex: 1; min-width: 0; }

/* external-link arrow: one CSS-drawn mark shared by every item, instead of an inline
   svg duplicated per link — add/drop it from an item just by adding/removing this class */
.fc-menu-item::after {
  content: '';
  width: 12px;
  height: 12px;
  flex-shrink: 0;
  background-color: currentColor;
  opacity: 0.45;
  transition: opacity 0.15s ease;
  -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23000' stroke-width='1.6' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M7 17L17 7M8 7h9v9'/%3E%3C/svg%3E") no-repeat center / contain;
  mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23000' stroke-width='1.6' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M7 17L17 7M8 7h9v9'/%3E%3C/svg%3E") no-repeat center / contain;
}
.fc-menu-item:hover::after { opacity: 0.9; }

@media (prefers-reduced-motion: reduce) {
  .fc-menu, .fc-overlay { transition-duration: 0.05s; }
  .fc-line { transition: none; }
}