/* =========================================================
   GENBOT Robotics Club — Apple-style design system
   Black / silver palette · system fonts · minimal layout
   ========================================================= */

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  color-scheme: dark;
  --bg: #000;
  --bg-2: #0a0a0b;
  --surface: #111113;
  --surface-2: #1d1d1f;
  --border: rgba(255, 255, 255, 0.12);
  --border-soft: rgba(255, 255, 255, 0.08);
  --text: #f5f5f7;
  --text-dim: #86868b;
  --text-faint: #6e6e73;
  --accent: #2997ff;
  --danger: #ff453a;
  --success: #30d158;
  --radius: 18px;
  --radius-sm: 12px;
  --nav-h: 48px;
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Text", "SF Pro Display",
    "Helvetica Neue", Helvetica, Arial, sans-serif;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.skip-link {
  position: fixed;
  top: 8px;
  left: 12px;
  z-index: 100;
  padding: 10px 18px;
  border-radius: 999px;
  background: var(--surface-2);
  color: var(--text);
  font-size: 0.85rem;
  border: 1px solid var(--border);
  transform: translateY(-160%);
  transition: transform 0.25s ease;
}

.skip-link:focus {
  transform: none;
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
iframe:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

.nav-links a[aria-current="page"] {
  color: var(--text);
}

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

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

ul {
  list-style: none;
}

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

button,
input,
select,
textarea {
  font: inherit;
}

main {
  flex: 1;
}

.container {
  max-width: 980px;
  margin-inline: auto;
  padding-inline: 22px;
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 0;
  cursor: pointer;
  border-radius: 999px;
  padding: 11px 24px;
  font-size: 0.95rem;
  font-weight: 400;
  transition: background 0.3s ease, color 0.3s ease, transform 0.3s ease;
}

.btn-primary {
  background: var(--text);
  color: #000;
}

.btn-primary:hover {
  background: #fff;
  transform: scale(1.03);
}

.btn-secondary {
  background: var(--surface-2);
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  background: #2c2c2e;
  transform: scale(1.03);
}

.link {
  color: var(--accent);
  font-size: 1rem;
  transition: text-decoration 0.2s ease;
}

.link:hover {
  text-decoration: underline;
}

.link::after {
  content: '\203A';
  margin-left: 4px;
  display: inline-block;
}

/* ---------- Navigation ---------- */

.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 60;
  background: rgba(0, 0, 0, 0.78);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--border-soft);
}

.site-nav .nav-inner {
  max-width: 980px;
  margin-inline: auto;
  padding-inline: 22px;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.logo {
  font-weight: 600;
  font-size: 1.02rem;
  letter-spacing: 0.02em;
  color: var(--text);
  white-space: nowrap;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2.1rem;
}

.nav-links a {
  font-size: 0.8rem;
  color: rgba(245, 245, 247, 0.85);
  transition: color 0.3s ease;
}

.nav-links a:hover {
  color: var(--text);
}

.nav-links a.active {
  color: var(--text);
}

.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  background: none;
  border: 0;
  cursor: pointer;
  padding: 8px;
}

.hamburger span {
  display: block;
  height: 1px;
  width: 100%;
  background: var(--text);
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.site-nav.nav-open .hamburger span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.site-nav.nav-open .hamburger span:nth-child(2) {
  opacity: 0;
}

.site-nav.nav-open .hamburger span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

/* ---------- Hero ---------- */

.hero {
  position: relative;
  min-height: calc(100vh - var(--nav-h));
  display: flex;
  align-items: center;
  padding: 90px 0 80px;
  text-align: center;
  overflow: hidden;
}

.hero-content {
  position: relative;
  z-index: 1;
  width: 100%;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  background: radial-gradient(60% 50% at 50% 40%, #101014 0%, #050506 70%);
}

.hero-bg iframe {
  width: 100%;
  height: 100%;
  border: 0;
  display: block;
}

.hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(180deg, rgba(0, 0, 0, 0.5) 0%, rgba(0, 0, 0, 0.2) 35%, rgba(0, 0, 0, 0.45) 62%, rgba(0, 0, 0, 0.95) 100%),
    radial-gradient(62% 46% at 50% 38%, rgba(0, 0, 0, 0.18), rgba(0, 0, 0, 0.72));
}

.hero .eyebrow {
  color: var(--text-faint);
  font-size: 0.85rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 18px;
}

.hero h1 {
  font-size: clamp(3rem, 9vw, 6.2rem);
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.02;
  text-shadow: 0 4px 40px rgba(0, 0, 0, 0.6);
}

.hero .tagline {
  font-size: clamp(1.05rem, 2.4vw, 1.35rem);
  color: #c7c7cc;
  max-width: 640px;
  margin: 24px auto 0;
  text-shadow: 0 2px 24px rgba(0, 0, 0, 0.8);
}

.hero-actions {
  margin-top: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 26px;
  flex-wrap: wrap;
}

/* ---------- Spline background band ---------- */

.spline-band {
  position: relative;
  min-height: 78vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
  padding: 100px 0;
}

.spline-band-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.spline-band-bg iframe {
  width: 100%;
  height: 100%;
  border: 0;
  display: block;
}

.spline-band-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(180deg, var(--bg) 0%, rgba(0, 0, 0, 0.3) 30%, rgba(0, 0, 0, 0.5) 74%, var(--bg) 100%),
    radial-gradient(60% 46% at 50% 46%, rgba(0, 0, 0, 0.14), rgba(0, 0, 0, 0.7));
}

.spline-band-content {
  position: relative;
  z-index: 1;
  width: 100%;
  pointer-events: none;
}

.spline-band-content .eyebrow {
  display: block;
  color: var(--text);
  opacity: 0.72;
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.spline-band-content h2 {
  font-size: clamp(2rem, 5vw, 3.6rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.08;
  text-shadow: 0 4px 40px rgba(0, 0, 0, 0.6);
}

.spline-band-content p {
  color: #c7c7cc;
  max-width: 560px;
  margin: 18px auto 0;
  font-size: 1.05rem;
  text-shadow: 0 2px 24px rgba(0, 0, 0, 0.8);
}

/* ---------- Sections ---------- */

.section {
  padding: 96px 0;
}

.section-head {
  max-width: 680px;
  margin: 0 auto 60px;
  text-align: center;
}

.section-head .eyebrow,
.split-copy .eyebrow {
  display: block;
  color: var(--text-faint);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 14px;
}

.section-head h2 {
  font-size: clamp(1.9rem, 4vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.015em;
  line-height: 1.12;
  margin-bottom: 14px;
}

.section-head p {
  color: var(--text-dim);
  font-size: 1.05rem;
}

/* ---------- Split ---------- */

.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.split-media img {
  border-radius: 22px;
  border: 1px solid var(--border-soft);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.5);
}

.split-copy h2 {
  font-size: clamp(1.7rem, 3.4vw, 2.6rem);
  font-weight: 700;
  letter-spacing: -0.015em;
  line-height: 1.15;
  margin-bottom: 18px;
}

.split-copy p {
  color: var(--text-dim);
  margin-bottom: 14px;
}

.plain-list {
  margin: 18px 0 26px;
}

.plain-list li {
  position: relative;
  padding: 6px 0 6px 22px;
  color: var(--text-dim);
}

.plain-list li::before {
  content: '';
  position: absolute;
  left: 4px;
  top: 15px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--text-faint);
}

/* ---------- Feature grid (disciplines) ---------- */

.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}

.feature-card {
  padding: 30px 24px 44px;
  border-top: 1px solid var(--border-soft);
}

.feature-card .ic {
  width: 32px;
  height: 32px;
  margin-bottom: 18px;
  color: var(--text-dim);
}

.feature-card h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.feature-card p {
  color: var(--text-dim);
  font-size: 0.95rem;
  line-height: 1.55;
}

/* ---------- Stats ---------- */

.stats-band {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
  text-align: center;
  border-top: 1px solid var(--border-soft);
  padding-top: 60px;
}

.stats-band .num {
  font-size: 2.6rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.1;
}

.stats-band .lbl {
  color: var(--text-faint);
  font-size: 0.9rem;
  margin-top: 6px;
}

/* ---------- Project grid ---------- */

.project-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}

.project-card {
  display: block;
  background: var(--surface);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform 0.4s ease, border-color 0.4s ease;
}

.project-card:hover {
  transform: translateY(-4px);
  border-color: var(--border);
}

.project-card .media {
  position: relative;
  aspect-ratio: 16 / 10;
  background: #0d0d0f;
  overflow: hidden;
}

.project-card .media img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.project-card .media::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(0, 0, 0, 0.35), transparent 55%);
}

.status {
  position: absolute;
  top: 12px;
  left: 12px;
  z-index: 1;
  font-size: 0.68rem;
  letter-spacing: 0.04em;
  color: var(--text);
  background: rgba(0, 0, 0, 0.6);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 4px 11px;
}

.card-body {
  padding: 22px;
}

.card-body h3 {
  font-size: 1.3rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.card-body p {
  color: var(--text-dim);
  font-size: 0.95rem;
  line-height: 1.55;
}

.tags {
  margin-top: 16px;
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.tag {
  font-size: 0.72rem;
  color: var(--text-dim);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 4px 11px;
}

.tag.hot {
  color: var(--text);
  border-color: rgba(245, 245, 247, 0.3);
}

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

.page-hero {
  position: relative;
  min-height: 64vh;
  display: flex;
  align-items: center;
  padding: calc(var(--nav-h) + 70px) 0 80px;
  text-align: center;
  overflow: hidden;
}

.page-hero .container {
  position: relative;
  z-index: 1;
}

.page-hero .eyebrow {
  display: block;
  color: var(--text);
  opacity: 0.72;
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.page-hero h1 {
  font-size: clamp(2.4rem, 6vw, 4.2rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.05;
  text-shadow: 0 4px 40px rgba(0, 0, 0, 0.6);
}

.page-hero p {
  color: #c7c7cc;
  max-width: 560px;
  margin: 16px auto 0;
  font-size: 1.1rem;
  text-shadow: 0 2px 24px rgba(0, 0, 0, 0.8);
}

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

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 0.8rem;
  color: var(--text-faint);
  margin-bottom: 18px;
  line-height: 1.6;
}

.breadcrumbs a {
  color: var(--text-dim);
  transition: color 0.3s ease;
}

.breadcrumbs a:hover {
  color: var(--text);
}

.breadcrumbs [aria-current] {
  color: var(--text);
}

/* ---------- Prose (article / project copy) ---------- */

.prose {
  max-width: 760px;
  margin-inline: auto;
  color: var(--text-dim);
  font-size: 1.02rem;
  line-height: 1.7;
}

.prose h2 {
  color: var(--text);
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  letter-spacing: -0.01em;
  margin: 52px 0 16px;
}

.prose h3 {
  color: var(--text);
  font-size: 1.18rem;
  font-weight: 600;
  margin: 34px 0 12px;
}

.prose p {
  margin-bottom: 16px;
}

.prose strong {
  color: var(--text);
  font-weight: 600;
}

.prose a {
  color: var(--accent);
}

.prose a:hover {
  text-decoration: underline;
}

.prose ul {
  margin: 16px 0 20px;
}

.prose ul li {
  position: relative;
  padding: 6px 0 6px 24px;
  color: var(--text-dim);
}

.prose ul li::before {
  content: '';
  position: absolute;
  top: 15px;
  left: 2px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
}

.article-meta {
  color: var(--text-faint);
  font-size: 0.85rem;
  letter-spacing: 0.02em;
  margin-bottom: 22px;
}

/* ---------- Detail cards (project specs) ---------- */

.detail-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin: 30px 0;
}

.detail-card {
  background: var(--surface);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-sm);
  padding: 18px 20px;
}

.detail-card h4 {
  font-size: 0.76rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-faint);
  margin-bottom: 8px;
}

.detail-card p,
.detail-card ul {
  color: var(--text-dim);
  font-size: 0.93rem;
  line-height: 1.55;
}

.detail-card ul li {
  padding: 2px 0;
}

.detail-card .tag {
  display: inline-block;
  margin: 4px 6px 0 0;
}

@media (max-width: 620px) {
  .detail-grid {
    grid-template-columns: 1fr;
  }
}

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

.cta-band {
  text-align: center;
  padding: 24px 0 0;
}

.cta-band h2 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 700;
  letter-spacing: -0.015em;
  margin-bottom: 12px;
}

.cta-band p {
  color: var(--text-dim);
  max-width: 560px;
  margin: 0 auto 28px;
}

/* ---------- Team ---------- */

.team-banner {
  position: relative;
  border-radius: 22px;
  overflow: hidden;
  margin-bottom: 72px;
  border: 1px solid var(--border-soft);
}

.team-banner img {
  width: 100%;
  aspect-ratio: 16 / 6;
  object-fit: cover;
  filter: grayscale(0.35) contrast(1.05);
}

.team-banner .caption {
  position: absolute;
  inset: auto 0 0 0;
  padding: 70px 26px 24px;
  background: linear-gradient(transparent, rgba(0, 0, 0, 0.78));
  text-align: center;
}

.team-banner .caption h2 {
  font-size: clamp(1.3rem, 3vw, 2rem);
  font-weight: 700;
  letter-spacing: -0.01em;
}

.team-group {
  margin-bottom: 68px;
}

.team-group h2 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 26px;
}

.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
}

.member-card {
  background: var(--surface);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  padding: 28px 22px;
  text-align: center;
  transition: transform 0.3s ease, border-color 0.3s ease;
}

.member-card:hover {
  transform: translateY(-3px);
  border-color: var(--border);
}

.avatar {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  margin: 0 auto 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--text);
  background: linear-gradient(135deg, #3a3a3c, #1d1d1f);
  border: 1px solid rgba(255, 255, 255, 0.14);
}

.member-card h3 {
  font-size: 1.02rem;
  font-weight: 600;
}

.role {
  color: var(--text);
  font-size: 0.85rem;
  margin-top: 4px;
}

.dept {
  color: var(--text-dim);
  font-size: 0.8rem;
  margin-top: 2px;
}

.roll {
  color: var(--text-faint);
  font-size: 0.72rem;
  font-variant-numeric: tabular-nums;
  margin-top: 4px;
}

/* ---------- Join form ---------- */

.layout {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 48px;
  align-items: start;
}

.form-panel {
  background: var(--surface);
  border: 1px solid var(--border-soft);
  border-radius: 22px;
  padding: 34px;
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.field.full {
  grid-column: 1 / -1;
}

.field label {
  display: block;
  font-size: 0.8rem;
  color: var(--text-dim);
  margin-bottom: 8px;
}

.field input,
.field select,
.field textarea {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  color: var(--text);
  outline: none;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.field textarea {
  min-height: 120px;
  resize: vertical;
}

.field input:focus,
.field select:focus,
.field textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(41, 151, 255, 0.18);
}

.field select option {
  background: var(--bg);
}

.btn-block {
  width: 100%;
  justify-content: center;
}

.info-panel h3 {
  font-size: 1.3rem;
  font-weight: 600;
  margin-bottom: 20px;
}

.info-panel ul li {
  display: flex;
  gap: 12px;
  padding: 15px 0;
  border-bottom: 1px solid var(--border-soft);
  color: var(--text-dim);
  font-size: 0.95rem;
}

.mini-stats {
  display: flex;
  gap: 30px;
  margin-top: 26px;
}

.mini-stats .num {
  font-size: 1.8rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.mini-stats .lbl {
  color: var(--text-faint);
  font-size: 0.8rem;
}

.form-success {
  display: none;
  text-align: center;
  padding: 44px 10px;
}

.form-success.show {
  display: block;
}

.form-success .check {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  margin: 0 auto 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(48, 209, 88, 0.14);
  border: 1px solid rgba(48, 209, 88, 0.4);
  color: var(--success);
}

.form-success .check svg {
  width: 30px;
  height: 30px;
  stroke: currentColor;
  fill: none;
  stroke-width: 2;
}

.form-success h3 {
  font-size: 1.4rem;
  font-weight: 600;
  margin-bottom: 10px;
}

.form-success p {
  color: var(--text-dim);
  max-width: 380px;
  margin-inline: auto;
}

/* ---------- Footer ---------- */

.site-footer {
  background: var(--bg-2);
  border-top: 1px solid var(--border-soft);
  padding: 60px 0 34px;
  font-size: 0.8rem;
  color: var(--text-dim);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--border-soft);
}

.site-footer .logo {
  font-size: 1.05rem;
}

.footer-grid .brand p {
  margin-top: 12px;
  max-width: 260px;
}

.site-footer h4 {
  color: var(--text);
  font-size: 0.76rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 14px;
}

.site-footer ul li {
  margin-bottom: 10px;
}

.site-footer a {
  color: var(--text-dim);
  transition: color 0.3s ease;
}

.site-footer a:hover {
  color: var(--text);
  text-decoration: underline;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  flex-wrap: wrap;
  padding-top: 26px;
}

.footer-bottom .heart {
  color: var(--text-faint);
}

/* ---------- Gesture toggle ---------- */

.gesture-toggle {
  position: fixed;
  bottom: 22px;
  right: 22px;
  z-index: 70;
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 10px 18px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(0, 0, 0, 0.78);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  color: var(--text-dim);
  font-size: 0.75rem;
  cursor: pointer;
  transition: color 0.3s ease, border-color 0.3s ease;
}

.gesture-toggle .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--text-faint);
  transition: background 0.3s ease, box-shadow 0.3s ease;
}

.gesture-toggle.on {
  border-color: var(--accent);
  color: var(--text);
}

.gesture-toggle.on .dot {
  background: var(--accent);
  box-shadow: 0 0 10px var(--accent);
}

/* ---------- Cursor dot (gesture) ---------- */

.cursor-dot {
  position: fixed;
  top: 0;
  left: 0;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--text);
  opacity: 0;
  pointer-events: none;
  z-index: 90;
  mix-blend-mode: difference;
  transform: translate(-100px, -100px);
}

/* ---------- Reveal ---------- */

.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.visible {
  opacity: 1;
  transform: none;
}

/* ---------- Responsive ---------- */

@media (max-width: 860px) {
  .split {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .feature-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .project-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .stats-band {
    grid-template-columns: repeat(2, 1fr);
    gap: 40px 20px;
  }

  .layout {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }}

@media (max-width: 620px) {
  .section {
    padding: 70px 0;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: var(--nav-h);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 1.3rem;
    padding: 14px 22px 22px;
    background: rgba(0, 0, 0, 0.96);
    border-bottom: 1px solid var(--border-soft);
  }

  .site-nav.nav-open .nav-links {
    display: flex;
  }

  .hamburger {
    display: flex;
  }

  .feature-grid {
    grid-template-columns: 1fr;
  }

  .feature-card {
    padding: 24px 0 30px;
  }

  .project-grid {
    grid-template-columns: 1fr;
  }

  .stats-band {
    grid-template-columns: 1fr;
    gap: 34px;
  }

  .form-grid {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .spline-band {
    min-height: 70vh;
    padding: 80px 0;
  }

  .footer-bottom {
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}