/* =========================================================
   Navigation
========================================================= */

.nav {
  position: fixed;
  inset-inline: 0;
  top: 0;
  z-index: var(--z-nav);
  height: var(--nav-height);
  display: flex;
  align-items: center;
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: background var(--dur-base) var(--ease-out),
    border-color var(--dur-base) var(--ease-out);
}

.nav--scrolled {
  background: rgba(var(--void-rgb), 0.72);
  backdrop-filter: blur(var(--blur-panel));
  -webkit-backdrop-filter: blur(var(--blur-panel));
  border-bottom: 1px solid var(--hairline);
}

.nav__inner {
  width: 100%;
  max-width: 1200px;
  margin-inline: auto;
  padding-inline: clamp(20px, 5vw, 64px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-5);
}

.nav__brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.nav__brand img {
  height: 34px;
  width: auto;
}

.nav__brand-word {
  font-family: var(--font-mono);
  font-size: 0.9375rem;
  letter-spacing: 0.16em;
  color: var(--bone);
}

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-7);
}

.nav__link {
  position: relative;
  font-size: var(--fs-small);
  color: var(--mist);
  padding-block: var(--space-2);
  transition: color var(--dur-fast) var(--ease-out);
}

.nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 1px;
  background: var(--gold);
  transition: width var(--dur-base) var(--ease-out);
}

.nav__link:hover,
.nav__link:focus-visible {
  color: var(--bone);
}

.nav__link:hover::after,
.nav__link:focus-visible::after {
  width: 100%;
}

.nav__actions {
  display: flex;
  align-items: center;
  gap: var(--space-5);
}

.nav__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
}

.nav__toggle span {
  display: block;
  width: 20px;
  height: 1px;
  background: var(--bone);
  margin-inline: auto;
  transition: transform var(--dur-base) var(--ease-out),
    opacity var(--dur-base) var(--ease-out);
}

.nav__toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.nav__toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.nav__toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

.nav__panel {
  display: none;
}

.btn.nav__cta--mobile {
  display: none;
}

@media (max-width: 1023px) {
  .nav__links {
    position: fixed;
    inset: var(--nav-height) 0 0 0;
    z-index: var(--z-mobile-panel);
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-6);
    padding: var(--space-8) clamp(20px, 6vw, 48px);
    background: rgba(var(--void-rgb), 0.98);
    backdrop-filter: blur(var(--blur-panel));
    -webkit-backdrop-filter: blur(var(--blur-panel));
    transform: translateY(-12px);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity var(--dur-base) var(--ease-out),
      transform var(--dur-base) var(--ease-out), visibility var(--dur-base);
  }

  .nav__links .nav__link {
    font-size: var(--fs-h3);
    font-family: var(--font-display);
    color: var(--bone);
  }

  .nav__links.is-open {
    opacity: 1;
    transform: translateY(0);
    visibility: visible;
    pointer-events: auto;
  }

  .btn.nav__cta--desktop {
    display: none;
  }

  .btn.nav__cta--mobile {
    display: inline-flex;
    margin-top: var(--space-4);
  }

  .nav__toggle {
    display: flex;
  }
}

/* =========================================================
   Buttons
========================================================= */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  font-family: var(--font-body);
  font-size: var(--fs-small);
  font-weight: 600;
  letter-spacing: 0.01em;
  padding: var(--space-4) var(--space-6);
  border-radius: var(--radius-pill);
  white-space: nowrap;
  transition: transform var(--dur-base) var(--ease-out),
    box-shadow var(--dur-base) var(--ease-out),
    border-color var(--dur-base) var(--ease-out),
    color var(--dur-base) var(--ease-out);
}

.btn--primary {
  position: relative;
  background: var(--gold-foil);
  color: var(--void);
  overflow: hidden;
}

.btn--primary::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    115deg,
    transparent 20%,
    rgba(255, 255, 255, 0.55) 50%,
    transparent 80%
  );
  transform: translateX(-120%);
  transition: transform var(--dur-slow) var(--ease-out);
}

.btn--primary:hover,
.btn--primary:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 16px 32px -14px rgba(var(--gold-rgb), 0.55);
}

.btn--primary:hover::before,
.btn--primary:focus-visible::before {
  transform: translateX(120%);
}

.btn--ghost {
  border: 1px solid var(--hairline-strong);
  color: var(--bone);
  background: rgba(var(--bone-rgb), 0.02);
}

.btn--ghost:hover,
.btn--ghost:focus-visible {
  border-color: var(--border-hover);
  color: var(--champagne);
  transform: translateY(-2px);
}

.btn--block {
  width: 100%;
}

.btn__arrow {
  display: inline-block;
  transition: transform var(--dur-base) var(--ease-out);
}

.btn:hover .btn__arrow {
  transform: translateX(3px);
}

/* =========================================================
   Cards (subtle glass)
========================================================= */

.card {
  position: relative;
  padding: var(--space-6);
  background: radial-gradient(
      220px circle at var(--mx, 50%) var(--my, 50%),
      rgba(var(--gold-rgb), 0),
      transparent 70%
    ),
    var(--panel-glass);
  backdrop-filter: blur(var(--blur-panel));
  -webkit-backdrop-filter: blur(var(--blur-panel));
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  transition: transform var(--dur-base) var(--ease-out),
    border-color var(--dur-base) var(--ease-out),
    box-shadow var(--dur-base) var(--ease-out);
}

.card:hover {
  transform: translateY(-6px);
  border-color: var(--border-hover);
  box-shadow: var(--shadow-card-hover), 0 0 32px rgba(var(--gold-rgb), 0.12);
}

@media (hover: hover) and (pointer: fine) {
  .card:hover {
    background: radial-gradient(
        220px circle at var(--mx, 50%) var(--my, 50%),
        rgba(var(--gold-rgb), 0.14),
        transparent 70%
      ),
      var(--panel-glass);
  }
}

.card--marked {
  position: relative;
}

.card--marked::before,
.card--marked::after {
  content: "";
  position: absolute;
  width: 10px;
  height: 10px;
  pointer-events: none;
  transition: border-color var(--dur-base) var(--ease-out);
}

.card--marked::before {
  top: 10px;
  left: 10px;
  border-top: 1px solid var(--bronze);
  border-left: 1px solid var(--bronze);
}

.card--marked::after {
  bottom: 10px;
  right: 10px;
  border-bottom: 1px solid var(--bronze);
  border-right: 1px solid var(--bronze);
}

.card--marked:hover::before,
.card--marked:hover::after {
  border-color: var(--gold);
}

@media (prefers-reduced-motion: no-preference) {
  .card--marked::before,
  .card--marked::after {
    animation: bracket-breathe 3.6s ease-in-out infinite;
  }

  @keyframes bracket-breathe {
    0%,
    100% {
      filter: drop-shadow(0 0 0 rgba(var(--gold-rgb), 0));
    }
    50% {
      filter: drop-shadow(0 0 4px rgba(var(--gold-rgb), 0.6));
    }
  }
}

.text-foil,
.text-shimmer {
  color: var(--gold);
}

@supports (background-clip: text) or (-webkit-background-clip: text) {
  .text-foil {
    background: var(--gold-foil);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
  }

  .text-shimmer {
    background: linear-gradient(
      100deg,
      var(--bronze) 0%,
      var(--bronze) 24%,
      var(--champagne) 40%,
      var(--gold) 50%,
      var(--champagne) 60%,
      var(--bronze) 76%,
      var(--bronze) 100%
    );
    background-size: 260% 100%;
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
  }

  @media (prefers-reduced-motion: no-preference) {
    .text-shimmer {
      animation: text-shimmer-sweep 6.5s linear infinite;
    }
  }

  @keyframes text-shimmer-sweep {
    0% {
      background-position: 180% 0;
    }
    100% {
      background-position: -80% 0;
    }
  }
}

.card__index {
  font-family: var(--font-mono);
  font-size: var(--fs-small);
  color: var(--gold);
  margin-bottom: var(--space-5);
}

.card__title {
  font-size: var(--fs-h3);
  margin-bottom: var(--space-3);
}

.card__text {
  color: var(--mist);
  font-size: var(--fs-small);
  line-height: var(--lh-body);
}

/* schematic node used outside SVG (timeline, comparison) */

.node-dot {
  width: 10px;
  height: 10px;
  flex-shrink: 0;
  border: 1px solid var(--gold);
  background: var(--void);
  border-radius: 2px;
  transform: rotate(45deg);
}

.node-dot--active {
  background: var(--gold);
  box-shadow: 0 0 0 4px rgba(var(--gold-rgb), 0.15);
}

.node-dot--muted {
  border-color: var(--hairline-strong);
  opacity: 0.6;
}

@media (prefers-reduced-motion: no-preference) {
  .node-dot--active {
    animation: node-dot-glow 2.6s ease-in-out infinite;
  }

  @keyframes node-dot-glow {
    0%,
    100% {
      box-shadow: 0 0 0 4px rgba(var(--gold-rgb), 0.15);
    }
    50% {
      box-shadow: 0 0 0 7px rgba(var(--gold-rgb), 0.28);
    }
  }
}

/* =========================================================
   Form
========================================================= */

.form-field {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-bottom: var(--space-5);
}

.form-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--mist);
}

.form-input,
.form-textarea {
  background: rgba(var(--bone-rgb), 0.03);
  border: 1px solid var(--hairline-strong);
  border-radius: var(--radius-sm);
  padding: var(--space-4);
  color: var(--bone);
  font-size: var(--fs-body);
  transition: border-color var(--dur-fast) var(--ease-out),
    background var(--dur-fast) var(--ease-out);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: rgba(140, 147, 166, 0.6);
}

.form-input:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--gold);
  background: rgba(var(--bone-rgb), 0.05);
}

.form-textarea {
  min-height: 140px;
  resize: vertical;
}

.form-status {
  min-height: 1.4em;
  font-size: var(--fs-small);
  color: var(--gold);
  margin-top: var(--space-4);
}

/* =========================================================
   Stats
========================================================= */

.stat {
  padding-block: var(--space-6);
  border-top: 1px solid var(--hairline);
}

.stat__value {
  font-family: var(--font-mono);
  font-size: var(--fs-stat);
  margin-bottom: var(--space-2);
  overflow-wrap: break-word;
}

.stat__label {
  color: var(--mist);
  font-size: var(--fs-small);
}

/* =========================================================
   Misc
========================================================= */

.disclaimer {
  font-size: var(--fs-small);
  color: var(--mist);
  border-left: 2px solid var(--border-subtle);
  padding-left: var(--space-4);
}