/* ============================================================
   ELECTRIC APU — DESIGN SYSTEM
   Display: Manrope (confident, geometric, works at large scale)
   Body:    Inter (neutral, highly legible)
   Data:    IBM Plex Mono (engineering-precision numerals for the
            calculator, spec tables and technical labels — this is
            the one deliberate typographic signature of the site)
   ============================================================ */

:root {
  --ink: #0B0C0E;
  --ink-soft: #14161A;
  --ink-line: #24272C;
  --paper: #F5F3EE;
  --paper-soft: #EDEAE2;
  --paper-line: #D8D3C7;
  --blue: #2C78B8;
  --blue-bright: #4A93D6;
  --steel: #7B838C;
  --success: #4F7A63;
  --amber: #B36A20;

  --font-display: 'Manrope', 'Neue Montreal', 'General Sans', system-ui, sans-serif;
  --font-body: 'Inter', 'General Sans', system-ui, sans-serif;
  --font-mono: 'IBM Plex Mono', ui-monospace, 'SF Mono', monospace;

  --container: 1240px;
  --gutter: clamp(20px, 5vw, 64px);
  --radius: 3px;

  --ease: cubic-bezier(.16,.84,.32,1);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; scroll-behavior: auto !important; }
}

body {
  margin: 0;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img, video { max-width: 100%; display: block; }

a { color: inherit; text-decoration: none; }

::selection { background: var(--blue); color: #fff; }

:focus-visible {
  outline: 2px solid var(--blue-bright);
  outline-offset: 3px;
}

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

/* ---------- typography ---------- */

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.01em;
  margin: 0;
}

h1 { font-size: clamp(2.6rem, 6vw, 5.4rem); }
h2 { font-size: clamp(2rem, 4vw, 3.4rem); }
h3 { font-size: clamp(1.3rem, 2.2vw, 1.8rem); }

p { margin: 0 0 1em; max-width: 62ch; }

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--blue-bright);
  display: inline-block;
  margin-bottom: 1.1rem;
}

.section--paper .eyebrow { color: var(--blue); }

.lede {
  font-size: clamp(1.05rem, 1.4vw, 1.3rem);
  color: var(--steel);
  max-width: 52ch;
}

.section--paper .lede { color: #555; }

.mono-num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum";
}

/* ---------- claim markers (internal mode only) ---------- */

.claim-marker {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--amber);
  border: 1px solid var(--amber);
  border-radius: 2px;
  padding: 1px 6px;
  margin-left: 8px;
  vertical-align: middle;
  white-space: nowrap;
}

/* ---------- buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 0.01em;
  padding: 15px 28px;
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform .5s cubic-bezier(.19,.72,.24,1), background .4s ease, border-color .4s ease, color .4s ease;
}

.btn-primary {
  background: var(--blue);
  color: #fff;
}
.btn-primary:hover { background: var(--blue-bright); transform: scale(1.025); }

.btn-ghost {
  background: transparent;
  color: var(--paper);
  border-color: rgba(245,243,238,0.35);
}
.btn-ghost:hover { border-color: var(--paper); transform: scale(1.025); }

.section--paper .btn-ghost {
  color: var(--ink);
  border-color: rgba(11,12,14,0.25);
}
.section--paper .btn-ghost:hover { border-color: var(--ink); }

.btn-row { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 2.2rem; }

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

.site-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 28px 0;
  transition: background .5s var(--ease), border-color .5s var(--ease), padding .5s var(--ease), backdrop-filter .5s var(--ease);
  border-bottom: 1px solid transparent;
  backdrop-filter: blur(0px);
  -webkit-backdrop-filter: blur(0px);
}
.site-nav.is-solid {
  background: rgba(11,12,14,0.6);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom-color: rgba(255,255,255,0.06);
  padding: 18px 0;
}
.site-nav .container { display: flex; align-items: center; justify-content: space-between; }

.nav-brand {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.2rem;
  letter-spacing: -0.01em;
}
.nav-brand small {
  display: block;
  font-family: var(--font-mono);
  font-weight: 400;
  font-size: 0.6rem;
  letter-spacing: 0.12em;
  color: var(--steel);
  text-transform: uppercase;
  margin-top: 3px;
}

.nav-links { display: flex; gap: 34px; }
.nav-links a {
  font-size: 0.88rem;
  font-weight: 500;
  color: rgba(245,243,238,0.78);
  transition: color .2s;
}
.nav-links a:hover, .nav-links a.active { color: #fff; }

.nav-toggle { display: none; }

@media (max-width: 560px) {
  #navQuoteBtn { display: none; }
}

@media (max-width: 860px) {
  .nav-links { display: none; }
  .nav-toggle {
    display: block;
    background: none; border: none; color: var(--paper);
    font-family: var(--font-mono); font-size: 0.8rem; letter-spacing: 0.1em;
    text-transform: uppercase; cursor: pointer;
  }
}

/* ---------- sections ---------- */

.section {
  padding: clamp(64px, 10vw, 130px) 0;
  position: relative;
}
.section--paper { background: var(--paper); color: var(--ink); }
.section--ink { background: var(--ink); }
.section--soft { background: var(--ink-soft); }
.section-border { border-top: 1px solid var(--ink-line); }
.section--paper.section-border { border-top: 1px solid var(--paper-line); }

.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity .9s var(--ease), transform .9s var(--ease);
}
.reveal.is-visible { opacity: 1; transform: translateY(0); }

/* ---------- hero ---------- */

.hero {
  position: relative;
  height: 100vh;
  height: 100svh;
  display: flex;
  align-items: flex-end;
  overflow: hidden;
  background: var(--ink);
}
.hero::after {
  content: '';
  position: absolute; inset: 0;
  background: #000;
  opacity: var(--scroll-dark, 0);
  z-index: 1;
  pointer-events: none;
}
.hero-media {
  position: absolute; inset: 0;
  overflow: hidden;
  will-change: transform;
  transition: transform 0.1s linear;
}
.hero-media video, .hero-media img {
  width: 100%; height: 100%; object-fit: cover;
  filter: brightness(0.62) saturate(1.06) contrast(1.05);
}
.hero-media::after {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(11,12,14,0.1) 0%, rgba(11,12,14,0.28) 55%, rgba(11,12,14,0.82) 100%);
}

.hero-content {
  position: relative;
  z-index: 2;
  padding: 0 var(--gutter) clamp(70px, 11vh, 130px);
  max-width: var(--container);
  margin: 0 auto;
  width: 100%;
}
.hero-content h1 {
  overflow: hidden;
  margin-top: 1.1rem;
}
.hero-content h1 span {
  display: block;
}
.hero-mask {
  overflow: hidden;
}
.hero-mask > * {
  transform: translateY(40px);
  opacity: 0;
  transition: transform 1.5s cubic-bezier(.19,.72,.24,1), opacity 1.5s cubic-bezier(.19,.72,.24,1);
}
.hero.is-ready .hero-mask > * {
  transform: translateY(0);
  opacity: 1;
}
/* Luxury stagger — each line arrives a beat after the last, never all at once */
.hero-mask:nth-child(1) > * { transition-delay: 0s; }
.hero-mask:nth-child(2) > * { transition-delay: .22s; }
.hero-mask:nth-child(3) > * { transition-delay: .42s; }
.hero-mask:nth-child(4) > * { transition-delay: .64s; }

.hero-sub { color: var(--paper); opacity: 0.8; font-weight: 400; font-size: clamp(1rem, 1.6vw, 1.2rem); margin-top: 1.6rem; max-width: 40ch; letter-spacing: 0.01em; }

/* ---------- premium scroll cue (animated mouse indicator) ---------- */
.hero-scroll-cue {
  position: absolute; bottom: 34px; left: 50%; transform: translateX(-50%);
  z-index: 2;
  opacity: 0;
  transition: opacity 1.4s ease;
  transition-delay: .9s;
  width: 22px; height: 36px;
  border: 1.5px solid rgba(245,243,238,0.4);
  border-radius: 12px;
}
.hero.is-ready .hero-scroll-cue { opacity: 1; }
.hero-scroll-cue::before {
  content: '';
  position: absolute;
  top: 7px; left: 50%;
  width: 3px; height: 6px;
  margin-left: -1.5px;
  border-radius: 2px;
  background: rgba(245,243,238,0.7);
  animation: scrollCueDrift 2.2s ease-in-out infinite;
}
@keyframes scrollCueDrift {
  0% { transform: translateY(0); opacity: 1; }
  60% { transform: translateY(10px); opacity: 0.2; }
  61% { transform: translateY(0); opacity: 0; }
  100% { transform: translateY(0); opacity: 1; }
}

@media (max-width: 700px) {
  .hero-media video, .hero-media img { object-position: center 35%; }
}

/* ---------- stat row (idling cost) ---------- */

.stat-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--ink-line);
  margin-top: 3rem;
  border: 1px solid var(--ink-line);
}
.stat-cell {
  background: var(--ink);
  padding: 28px 24px;
}
.stat-cell .value {
  font-family: var(--font-mono);
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 500;
  color: var(--blue-bright);
}
.stat-cell .label {
  font-size: 0.82rem;
  color: var(--steel);
  margin-top: 6px;
}
@media (max-width: 760px) {
  .stat-row { grid-template-columns: repeat(2, 1fr); }
}

.big-number {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: clamp(3rem, 8vw, 6.5rem);
  color: var(--blue-bright);
  line-height: 1;
  margin: 1.6rem 0;
}
.big-number small { font-size: 0.35em; color: var(--steel); display: block; font-family: var(--font-body); margin-top: 10px; }

/* ---------- emotional transition ---------- */

.transition-section {
  min-height: 70vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: var(--ink);
}
.transition-section h2 { max-width: 16ch; }
.transition-section h2 .off { color: var(--steel); display: block; }
.transition-section h2 .on { color: var(--paper); display: block; }

/* ---------- system grid ---------- */

.system-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1px;
  background: var(--ink-line);
  border: 1px solid var(--ink-line);
  margin-top: 3rem;
}
.system-item {
  background: var(--ink-soft);
  padding: 30px 22px;
  min-height: 220px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}
.system-item .num { font-family: var(--font-mono); color: var(--blue-bright); font-size: 0.8rem; }
.system-item .label { font-family: var(--font-display); font-weight: 700; font-size: 1.15rem; margin: 14px 0 8px; }
.system-item .detail { font-size: 0.88rem; color: var(--steel); margin: 0; }
@media (max-width: 980px) {
  .system-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
  .system-grid { grid-template-columns: 1fr; }
}

/* ---------- comparison split ---------- */

.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--ink-line);
  border: 1px solid var(--ink-line);
  margin-top: 3rem;
}
.split-col { padding: 40px 34px; }
.split-col.off { background: var(--ink-soft); }
.split-col.on { background: linear-gradient(160deg, #12253a, #0B0C0E); }
.split-col h4 { font-family: var(--font-mono); font-size: 0.78rem; letter-spacing: 0.1em; text-transform: uppercase; margin-bottom: 20px; color: var(--steel); }
.split-col.on h4 { color: var(--blue-bright); }
.split-col ul { list-style: none; margin: 0; padding: 0; }
.split-col li { padding: 10px 0; border-top: 1px solid rgba(255,255,255,0.06); font-size: 0.95rem; }
.split-col li:first-child { border-top: none; }
@media (max-width: 760px) { .split { grid-template-columns: 1fr; } }

/* ---------- spec cards ---------- */

.spec-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--paper-line);
  border: 1px solid var(--paper-line);
  margin-top: 3rem;
}
.spec-card {
  background: var(--paper);
  padding: 30px 26px;
}
.spec-card .stat {
  font-family: var(--font-mono);
  font-size: 2.1rem;
  color: var(--blue);
}
.spec-card .stat span { font-size: 1rem; color: var(--steel); margin-left: 6px; }
.spec-card .label { margin-top: 8px; font-size: 0.9rem; color: #555; }
@media (max-width: 760px) { .spec-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 480px) { .spec-grid { grid-template-columns: 1fr; } }

/* ---------- steps ---------- */

.steps {
  counter-reset: step;
  margin-top: 3rem;
  border-top: 1px solid var(--ink-line);
}
.step {
  counter-increment: step;
  display: grid;
  grid-template-columns: 70px 1fr;
  gap: 24px;
  padding: 26px 0;
  border-bottom: 1px solid var(--ink-line);
  align-items: baseline;
}
.step::before {
  content: counter(step, decimal-leading-zero);
  font-family: var(--font-mono);
  color: var(--blue-bright);
  font-size: 1rem;
}
.step p { margin: 0; font-size: 1.02rem; }

/* ---------- cards generic ---------- */

.card {
  border: 1px solid var(--ink-line);
  padding: 30px;
  background: var(--ink-soft);
}
.section--paper .card { background: #fff; border-color: var(--paper-line); }

/* ---------- final CTA ---------- */

.final-cta {
  text-align: center;
  padding: clamp(80px, 12vw, 150px) 0;
  background: radial-gradient(ellipse at 50% 0%, #14263a 0%, var(--ink) 60%);
}
.final-cta h2 { margin-bottom: 2rem; }
.final-cta .btn-row { justify-content: center; }

/* ---------- footer ---------- */

.site-footer {
  background: var(--ink);
  border-top: 1px solid var(--ink-line);
  padding: 60px 0 30px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
}
.footer-grid h5 { font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--steel); margin-bottom: 16px; }
.footer-grid ul { list-style: none; margin: 0; padding: 0; }
.footer-grid li { margin-bottom: 10px; font-size: 0.9rem; }
.footer-grid a:hover { color: var(--blue-bright); }
.footer-bottom {
  border-top: 1px solid var(--ink-line);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.78rem;
  color: var(--steel);
}
@media (max-width: 760px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

/* ---------- internal mode banner ---------- */

.internal-banner {
  background: var(--amber);
  color: #1a0f00;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  text-align: center;
  padding: 7px 12px;
  position: relative;
  z-index: 200;
}

/* ---------- forms ---------- */

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-top: 2.5rem;
}
.form-grid .full { grid-column: 1 / -1; }
.field label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--steel);
  margin-bottom: 8px;
}
.field input, .field select, .field textarea {
  width: 100%;
  background: var(--ink-soft);
  border: 1px solid var(--ink-line);
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 0.98rem;
  padding: 13px 14px;
  border-radius: var(--radius);
}
.field textarea { resize: vertical; min-height: 100px; }
.field input:focus, .field select:focus, .field textarea:focus {
  outline: 2px solid var(--blue-bright);
  outline-offset: 1px;
  border-color: var(--blue-bright);
}
.field-check { display: flex; align-items: flex-start; gap: 10px; font-size: 0.85rem; color: var(--steel); }
@media (max-width: 700px) { .form-grid { grid-template-columns: 1fr; } }

/* ---------- calculator ---------- */

.calc-wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--ink-line);
  border: 1px solid var(--ink-line);
  margin-top: 3rem;
}
.calc-inputs, .calc-outputs { background: var(--ink-soft); padding: 36px; }
.calc-outputs { background: linear-gradient(160deg, #12253a, #0B0C0E); }
.calc-field { margin-bottom: 22px; }
.calc-field label { display: flex; justify-content: space-between; font-family: var(--font-mono); font-size: 0.75rem; letter-spacing: 0.05em; text-transform: uppercase; color: var(--steel); margin-bottom: 8px; }
.calc-field label .val { color: var(--blue-bright); }
.calc-field input[type="range"] { width: 100%; accent-color: var(--blue-bright); }
.calc-field input[type="number"] {
  width: 100%; background: var(--ink); border: 1px solid var(--ink-line); color: var(--paper);
  font-family: var(--font-mono); padding: 10px 12px; border-radius: var(--radius);
}
.calc-result { margin-bottom: 26px; }
.calc-result .label { font-size: 0.8rem; color: var(--steel); }
.calc-result .value { font-family: var(--font-mono); font-size: 2.2rem; color: var(--blue-bright); }
.calc-disclaimer { font-size: 0.78rem; color: var(--steel); margin-top: 20px; }
@media (max-width: 800px) { .calc-wrap { grid-template-columns: 1fr; } }

/* ---------- faq ---------- */

.faq-item { border-bottom: 1px solid var(--ink-line); }
.faq-q {
  width: 100%; text-align: left; background: none; border: none; color: var(--paper);
  font-family: var(--font-display); font-weight: 700; font-size: 1.05rem;
  padding: 22px 0; cursor: pointer; display: flex; justify-content: space-between; align-items: center; gap: 20px;
}
.faq-q .plus { font-family: var(--font-mono); color: var(--blue-bright); flex-shrink: 0; }
.faq-a { max-height: 0; overflow: hidden; transition: max-height .35s var(--ease); }
.faq-a p { padding: 0 0 22px; color: var(--steel); }
.faq-item.open .faq-a { max-height: 400px; }

/* ---------- cinematic color grading ---------- */
.cinematic-grade {
  filter: contrast(1.1) saturate(1.06) brightness(0.98);
}
.hero-grade-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(160deg, rgba(255, 190, 120, 0.06) 0%, rgba(0,0,0,0) 40%, rgba(40, 90, 140, 0.12) 100%);
  mix-blend-mode: overlay;
  pointer-events: none;
}

/* ---------- seamless sections (no hard dividing rule) ---------- */
.section-seamless { border-top: none; }
.section-seamless.section--ink + .section-seamless.section--ink { padding-top: 0; }

/* Cinematic overlap: Everything You Need rises slightly over the hero's
   lower edge instead of starting at a hard seam. */
#essentials {
  position: relative;
  z-index: 5;
  margin-top: clamp(-64px, -6vh, -32px);
  padding-top: clamp(96px, 14vh, 160px);
}

/* ---------- hero sound control ---------- */
.hero-sound-btn {
  position: absolute;
  bottom: 32px; right: var(--gutter);
  z-index: 3;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px; height: 38px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(245,243,238,0.22);
  color: rgba(245,243,238,0.85);
  border-radius: 50%;
  cursor: pointer;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: background .35s var(--ease), border-color .35s var(--ease), transform .35s var(--ease);
  opacity: 0;
}
.hero.is-ready .hero-sound-btn { opacity: 1; transition: background .35s var(--ease), border-color .35s var(--ease), transform .35s var(--ease), opacity 1.2s ease .9s; }
.hero-sound-btn:hover { background: rgba(255,255,255,0.14); border-color: rgba(245,243,238,0.4); transform: scale(1.06); }
.hero-sound-icon .sound-wave { opacity: 0; transition: opacity .25s ease; }
.hero-sound-icon .sound-mute-line { opacity: 1; transition: opacity .25s ease; }
.hero-sound-btn[aria-pressed="true"] .sound-wave { opacity: 1; }
.hero-sound-btn[aria-pressed="true"] .sound-mute-line { opacity: 0; }

/* ---------- essentials grid (Everything You Need) — editorial, not cards ---------- */
.essentials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(28px, 4vw, 56px);
  padding: 0 var(--gutter);
  max-width: var(--container);
  margin: 0 auto;
}
.essential-card { background: transparent; position: relative; }
.essential-card-media { overflow: hidden; aspect-ratio: 3/4; }
.essential-card-media img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform 3s var(--ease);
}
.essential-card:hover .essential-card-media img { transform: scale(1.025); }
.essential-card-headline {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.2rem, 1.7vw, 1.5rem);
  letter-spacing: -0.01em;
  padding: 1.8rem 0.2rem 0;
  margin: 0;
}
@media (max-width: 900px) {
  .essentials-grid { grid-template-columns: 1fr; gap: 60px; }
}

/* ---------- interactive hotspots ---------- */
.hotspot-wrap {
  position: relative;
  max-width: 1100px;
  margin: 0 auto;
}
.hotspot-image { width: 100%; display: block; }
.hotspot-dot {
  position: absolute;
  width: 22px; height: 22px;
  margin: -11px 0 0 -11px;
  border-radius: 50%;
  background: rgba(11,12,14,0.35);
  border: 1.5px solid rgba(255,255,255,0.75);
  backdrop-filter: blur(2px);
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  padding: 0;
}
.hotspot-dot-inner {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--blue-bright);
  box-shadow: 0 0 0 0 rgba(74,147,214,0.6);
  animation: hotspotPulse 2.4s ease-out infinite;
}
@keyframes hotspotPulse {
  0% { box-shadow: 0 0 0 0 rgba(74,147,214,0.55); }
  70% { box-shadow: 0 0 0 12px rgba(74,147,214,0); }
  100% { box-shadow: 0 0 0 0 rgba(74,147,214,0); }
}
.hotspot-dot:hover .hotspot-dot-inner, .hotspot-dot.is-active .hotspot-dot-inner { background: #fff; }
.hotspot-card {
  position: absolute;
  max-width: 280px;
  background: rgba(11,12,14,0.82);
  backdrop-filter: blur(14px);
  border: 1px solid rgba(255,255,255,0.14);
  border-radius: 6px;
  padding: 16px 18px;
  opacity: 0;
  transform: translateY(8px);
  pointer-events: none;
  transition: opacity .3s var(--ease), transform .3s var(--ease);
  z-index: 10;
}
.hotspot-card.is-visible { opacity: 1; transform: translateY(0); }
.hotspot-card-label {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.95rem;
  color: #fff;
  margin-bottom: 6px;
}
.hotspot-card-desc { font-size: 0.82rem; color: var(--steel); line-height: 1.5; }
@media (max-width: 700px) {
  .hotspot-card { position: fixed; left: 20px !important; right: 20px; bottom: 20px; top: auto !important; max-width: none; }
}

/* ---------- fullscreen glass nav overlay ---------- */
.nav-menu-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  background: none;
  border: 1px solid rgba(245,243,238,0.3);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 9px 16px;
  border-radius: 100px;
  cursor: pointer;
  transition: border-color .3s var(--ease), background .3s var(--ease);
}
.nav-menu-btn:hover { border-color: var(--paper); background: rgba(255,255,255,0.06); }
.nav-menu-icon { display: inline-block; width: 14px; }

.nav-overlay {
  position: fixed; inset: 0;
  z-index: 300;
  background: rgba(11,12,14,0.88);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity .5s var(--ease), visibility 0s linear .5s;
}
.nav-overlay.is-open {
  opacity: 1;
  visibility: visible;
  transition: opacity .5s var(--ease), visibility 0s linear 0s;
}
.nav-overlay-close {
  position: absolute;
  top: 26px; right: var(--gutter);
  background: none; border: none;
  color: var(--paper);
  font-size: 1.6rem;
  cursor: pointer;
  line-height: 1;
  padding: 10px;
}
.nav-overlay-links {
  list-style: none;
  margin: 0; padding: 0;
  text-align: center;
}
.nav-overlay-links li { margin: 0.55em 0; overflow: hidden; }
.nav-overlay-links a {
  display: inline-block;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(2rem, 6vw, 3.6rem);
  color: rgba(245,243,238,0.45);
  letter-spacing: -0.01em;
  transform: translateY(115%);
  transition: transform .7s cubic-bezier(.19,.72,.24,1), color .4s ease;
}
.nav-overlay.is-open .nav-overlay-links a { transform: translateY(0); }
.nav-overlay-links a:hover { color: var(--paper); }
.nav-overlay-foot {
  margin-top: 3rem;
  display: flex;
  gap: 24px;
  align-items: center;
}
@media (max-width: 700px) {
  .nav-overlay-links a { font-size: 2.2rem; }
}

/* ---------- utility ---------- */

.mt-0 { margin-top: 0; }
.text-center { text-align: center; }
.max-w { max-width: 720px; margin-left: auto; margin-right: auto; }