/* ============================================================
   ACM UEMJ — components.css
   Reusable c-* components. Each owns its full visuals — never
   redeclared from pages.css. See naming convention in README.
   ============================================================ */

/* Shared jali-lattice texture — extremely subtle (3-5%), never photographic */
:root {
  --jali-pattern: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='56' height='56' viewBox='0 0 56 56'%3E%3Cg fill='none' stroke='%23F4EDE2' stroke-width='.6'%3E%3Cpath d='M28 2 L54 28 L28 54 L2 28 Z'/%3E%3Ccircle cx='28' cy='28' r='6'/%3E%3C/g%3E%3C/svg%3E");
}

/* ============================================================
   Buttons
   ============================================================ */
.c-btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-family: var(--font-body);
  font-size: var(--fs-small);
  font-weight: 600;
  letter-spacing: var(--ls-wide);
  padding: var(--space-4) var(--space-6);
  border-radius: var(--radius-pill);
  border: 1px solid var(--border-hairline-strong);
  box-shadow: var(--shadow-engraved);
  background: var(--dune);
  color: var(--bone);
  white-space: nowrap;
  transition: box-shadow var(--dur-base) var(--ease-out), border-color var(--dur-base) var(--ease-out), background var(--dur-base) var(--ease-out);
}
.c-btn--sm { padding: var(--space-3) var(--space-5); font-size: var(--fs-caption); }

.c-btn--primary {
  background: linear-gradient(180deg, rgba(var(--cyan-rgb), .12), transparent), var(--dune);
  border-color: rgba(var(--cyan-rgb), .45);
}
.c-btn--primary:hover,
.c-btn--primary:focus-visible {
  box-shadow: var(--shadow-glow-cyan);
  border-color: rgba(var(--cyan-rgb), .7);
}

.c-btn--ghost {
  background: transparent;
  border-color: var(--border-hairline-strong);
}
.c-btn--ghost:hover,
.c-btn--ghost:focus-visible {
  border-color: rgba(var(--bone-rgb), .4);
  background: rgba(var(--bone-rgb), .04);
}

/* ============================================================
   Cards
   ============================================================ */
.c-card {
  position: relative;
  isolation: isolate;
  background: var(--surface-glass);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  overflow: hidden;
  transition: transform var(--dur-base) var(--ease-out), box-shadow var(--dur-base) var(--ease-out), border-color var(--dur-base) var(--ease-out);
}
.c-card::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: -1;
  background-image: var(--jali-pattern);
  background-size: 56px 56px;
  opacity: .04;
  pointer-events: none;
}
.c-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
  border-color: var(--border-hairline-strong);
}

/* Opaque, no-blur variant — used wherever many cards render at once (perf budget) */
.c-card--engraved {
  background: var(--dune);
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  box-shadow: var(--shadow-engraved), var(--shadow-card);
}
.c-card--engraved:hover {
  box-shadow: var(--shadow-engraved), var(--shadow-card-hover);
}

.c-card--feature {
  padding: var(--space-8);
}

.c-card--placard {
  padding: var(--space-5);
  border-radius: var(--radius-md);
  background: var(--dune);
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
}
.c-card--placard::before { display: none; }

/* ============================================================
   Badge / monogram
   ============================================================ */
.c-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--fs-mono-label);
  letter-spacing: var(--ls-wide);
  color: var(--slate);
  padding: var(--space-2) var(--space-4) var(--space-2) var(--space-3);
  border: 1px solid var(--border-hairline-strong);
  border-radius: var(--radius-pill);
  background: rgba(var(--void-rgb), .4);
}
.c-badge__dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 8px 1px rgba(var(--cyan-rgb), .8);
  animation: tick-pulse 2.4s var(--ease-in-out) infinite;
}

.c-monogram {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px; height: 56px;
  border-radius: 50%;
  font-family: var(--font-display);
  font-size: var(--fs-h4);
  background: var(--dune);
  border: 1px solid var(--border-hairline-strong);
  flex-shrink: 0;
}
.c-monogram--jali {
  width: 96px; height: 96px;
  font-size: var(--fs-h3);
  position: relative;
}
.c-monogram--jali::before {
  content: '';
  position: absolute;
  inset: -8px;
  border-radius: 50%;
  border: 1px solid rgba(var(--bone-rgb), .18);
  background-image: var(--jali-pattern);
  background-size: 40px 40px;
  opacity: .12;
}

/* ============================================================
   Nav
   ============================================================ */
.c-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: var(--z-nav);
  transition: transform var(--dur-base) var(--ease-out), background var(--dur-base) var(--ease-out);
}
.c-nav.has-scrolled {
  background: rgba(var(--void-rgb), .72);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-hairline);
}
.c-nav.is-hidden { transform: translateY(-100%); }

.c-nav__inner {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  padding-block: var(--space-4);
}

.c-nav__logo { display: flex; align-items: center; flex-shrink: 0; }
.c-nav__logo svg { width: 132px; height: 32px; color: var(--bone); }

.c-nav__progress { width: 28px; height: 28px; flex-shrink: 0; color: var(--cyan); }
.c-nav__progress circle { fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; }
.c-nav__progress circle.c-nav__progress-track { stroke: var(--border-hairline-strong); }

.c-nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  margin-inline: auto;
}
.c-nav__link {
  font-size: var(--fs-small);
  font-weight: 500;
  color: var(--slate);
  transition: color var(--dur-fast) var(--ease-out);
}
.c-nav__link:hover, .c-nav__link[aria-current="page"] { color: var(--bone); }

.c-nav__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px; height: 40px;
  flex-shrink: 0;
}
.c-nav__toggle span {
  display: block;
  width: 20px; height: 1.5px;
  background: var(--bone);
  transition: transform var(--dur-fast) var(--ease-out), opacity var(--dur-fast) var(--ease-out);
}
.c-nav__toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.c-nav__toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.c-nav__toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* ============================================================
   Accordion
   ============================================================ */
.c-accordion__item { border-bottom: 1px solid var(--border-hairline); }
.c-accordion__trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-5);
  text-align: left;
  padding-block: var(--space-5);
  font-family: var(--font-display);
  font-size: var(--fs-h4);
  font-weight: 500;
}
.c-accordion__trigger:hover { color: var(--cyan); }

.c-accordion__icon {
  position: relative;
  flex-shrink: 0;
  width: 22px; height: 22px;
}
.c-accordion__icon .c-accordion__icon-plus,
.c-accordion__icon .c-accordion__icon-node {
  position: absolute;
  inset: 0;
  transition: opacity var(--dur-base) var(--ease-out), transform var(--dur-base) var(--ease-out);
}
.c-accordion__icon-plus { stroke: var(--cyan); }
.c-accordion__icon-node { stroke: var(--marigold); opacity: 0; transform: rotate(-90deg) scale(.6); }
.c-accordion__trigger[aria-expanded="true"] .c-accordion__icon-plus { opacity: 0; transform: rotate(90deg) scale(.6); }
.c-accordion__trigger[aria-expanded="true"] .c-accordion__icon-node { opacity: 1; transform: rotate(0) scale(1); }

.c-accordion__panel {
  height: 0;
  overflow: hidden;
  color: var(--slate);
  line-height: var(--lh-relaxed);
}
.c-accordion__panel-inner { padding-bottom: var(--space-5); max-width: 62ch; }

/* ============================================================
   Field / input
   ============================================================ */
.c-field { display: flex; gap: var(--space-3); }
.c-field__label {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--fs-mono-label);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--slate);
  margin-bottom: var(--space-3);
}
.c-input {
  flex: 1 1 auto;
  min-width: 0;
  padding: var(--space-4) var(--space-5);
  background: var(--void);
  border: 1px solid var(--border-hairline-strong);
  box-shadow: var(--shadow-engraved);
  border-radius: var(--radius-pill);
  font-size: var(--fs-small);
}
.c-input:focus-visible { border-color: var(--cyan); }
.c-input::placeholder { color: var(--slate); }

/* ============================================================
   Marquee (sponsors)
   ============================================================ */
.c-marquee {
  overflow: hidden;
  border-top: 1px solid var(--border-hairline);
  border-bottom: 1px solid var(--border-hairline);
  padding-block: var(--space-6);
}
.c-marquee__track {
  display: flex;
  align-items: center;
  gap: var(--space-9);
  width: max-content;
  animation: marquee var(--marquee-duration, 32s) linear infinite;
}
.c-marquee.is-paused .c-marquee__track { animation-play-state: paused; }
.c-marquee__track li {
  font-family: var(--font-display);
  font-size: var(--fs-h3);
  font-weight: 500;
  color: var(--slate);
  filter: grayscale(1);
  opacity: .55;
  transition: color var(--dur-base) var(--ease-out), opacity var(--dur-base) var(--ease-out), filter var(--dur-base) var(--ease-out);
  white-space: nowrap;
}
.c-sponsor-chip {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-5);
  border: 1px solid var(--border-hairline-strong);
  border-radius: var(--radius-pill);
  background: rgba(var(--void-rgb), .28);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  color: var(--bone);
  box-shadow: var(--shadow-engraved);
}
.c-sponsor-chip img {
  width: 24px;
  height: 24px;
  object-fit: contain;
  flex-shrink: 0;
}
.c-sponsor-chip span:last-child {
  font-family: var(--font-mono);
  font-size: var(--fs-caption);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
}
.c-sponsor-chip__fallback {
  width: 24px;
  height: 24px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--grad-brand);
  color: var(--void);
  font-family: var(--font-mono);
  font-size: var(--fs-caption);
  font-weight: 700;
}
.c-marquee__track li:hover {
  color: var(--cyan);
  filter: grayscale(0);
  opacity: 1;
}
.c-marquee.is-static .c-marquee__track {
  animation: none;
  flex-wrap: wrap;
  width: 100%;
  justify-content: center;
}

/* ============================================================
   Divider
   ============================================================ */
.c-divider--yantra {
  display: block;
  width: 100%;
  height: 20px;
  color: var(--border-hairline-strong);
  opacity: .6;
}

/* ============================================================
   Cursor
   ============================================================ */
.c-cursor {
  position: fixed;
  top: 0; left: 0;
  z-index: var(--z-cursor);
  pointer-events: none;
  mix-blend-mode: difference;
}
.c-cursor__dot {
  position: fixed;
  top: 0; left: 0;
  width: 6px; height: 6px;
  margin: -3px 0 0 -3px;
  border-radius: 50%;
  background: var(--bone);
}
.c-cursor__ring {
  position: fixed;
  top: 0; left: 0;
  width: 34px; height: 34px;
  margin: -17px 0 0 -17px;
  border-radius: 50%;
  border: 1px solid var(--bone);
  transition: width var(--dur-fast) var(--ease-out), height var(--dur-fast) var(--ease-out),
              margin var(--dur-fast) var(--ease-out), border-radius var(--dur-fast) var(--ease-out),
              background var(--dur-fast) var(--ease-out), filter var(--dur-fast) var(--ease-out);
}
.c-cursor.is-hovering .c-cursor__ring {
  width: 64px; height: 64px;
  margin: -32px 0 0 -32px;
  background: rgba(var(--bone-rgb), .12);
  filter: blur(1px);
}

@media (pointer: coarse) {
  .c-cursor { display: none; }
}

/* ============================================================
   Loader
   ============================================================ */
.c-loader {
  position: fixed;
  inset: 0;
  z-index: var(--z-loader);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--void);
}
.c-loader.is-hidden { display: none; }

.c-loader__block {
  position: absolute;
  width: 160px; height: 160px;
  border-radius: var(--radius-md);
  background: var(--grad-warm);
  opacity: 0;
  transform: scale(.85);
}

.c-loader__engrave,
.c-loader__circuit {
  position: absolute;
  width: 160px; height: 160px;
  opacity: 0;
}
.c-loader__engrave { color: rgba(11, 13, 18, .55); }
.c-loader__circuit { color: var(--cyan); filter: drop-shadow(0 0 10px rgba(var(--cyan-rgb), .6)); }

.c-loader__wordmark {
  position: absolute;
  width: 240px; height: auto;
  color: var(--bone);
  opacity: 0;
}

/* Inheritable SVG presentation properties set here cascade into the
   <use>'s cloned instance content — paths inside the referenced
   symbols carry pathLength="1" so a single dasharray of 1 draws
   the whole group uniformly regardless of individual path length. */
.c-loader__engrave,
.c-loader__circuit,
.c-loader__wordmark {
  stroke-dasharray: 1;
  stroke-dashoffset: 1;
}

/* Back-to-top */
.c-back-to-top {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  z-index: var(--z-nav);
  width: 44px; height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--dune);
  border: 1px solid var(--border-hairline-strong);
  box-shadow: var(--shadow-engraved), var(--shadow-card);
  color: var(--bone);
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity var(--dur-base) var(--ease-out), transform var(--dur-base) var(--ease-out), border-color var(--dur-base) var(--ease-out);
}
.c-back-to-top.is-visible { opacity: 1; visibility: visible; transform: translateY(0); }
.c-back-to-top:hover { border-color: rgba(var(--cyan-rgb), .5); color: var(--cyan); }