:root {
  --bg-light-1: #f0f4f8;
  --bg-light-2: #e4eaf2;
  --bg-light-3: #d4dde8;
  --bg-dark-1: #0b0f2a;
  --bg-dark-2: #140a2e;
  --text-light: #1a2438;
  --text-dark: #e9f0ff;
  --muted-light: rgba(26, 36, 56, 0.58);
  --muted-dark: rgba(233, 240, 255, 0.72);
  --surface-light: rgba(255, 255, 255, 0.62);
  --surface-dark: rgba(18, 24, 54, 0.66);
  --surface-border-light: rgba(180, 195, 220, 0.4);
  --surface-border-dark: rgba(132, 173, 255, 0.16);
  --carrier: #3b82d6;
  --modulation: #2a5fad;
  --glow-carrier: rgba(59, 130, 214, 0.28);
  --glow-mod: rgba(42, 95, 173, 0.2);
  --signal-alpha: 0.55;
  --grid-opacity: 0;
}

body.dark {
  --carrier: #3a86ff;
  --modulation: #7b2cbf;
  --glow-carrier: rgba(58, 134, 255, 0.46);
  --glow-mod: rgba(123, 44, 191, 0.34);
  --signal-alpha: 0.74;
}

body.oscilloscope {
  --grid-opacity: 0.23;
  --signal-alpha: 0.95;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Manrope", "Segoe UI", sans-serif;
  color: var(--text-light);
  background: linear-gradient(160deg, var(--bg-light-1), var(--bg-light-2) 45%, var(--bg-light-3));
  transition: background 0.3s ease, color 0.3s ease;
  overflow-x: hidden;
}

body.dark {
  color: var(--text-dark);
  background: radial-gradient(circle at 15% 8%, #1a2a58 0%, var(--bg-dark-1) 48%, var(--bg-dark-2) 100%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(rgba(120, 180, 255, 0.16) 1px, transparent 1px),
    linear-gradient(90deg, rgba(120, 180, 255, 0.14) 1px, transparent 1px);
  background-size: 56px 56px;
  opacity: var(--grid-opacity);
  transition: opacity 0.25s ease;
  pointer-events: none;
}

#signalCanvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 22;
  pointer-events: none;
  opacity: var(--signal-alpha);
  mix-blend-mode: screen;
}

.progress-wrap {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  z-index: 240;
}

.progress-bar {
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--carrier), var(--modulation));
}

.nav-shell {
  position: sticky;
  top: 0;
  z-index: 180;
  padding: 0.92rem 1rem;
}

.nav {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0.7rem 1rem;
  border-radius: 999px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  border: 1px solid var(--surface-border-light);
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: blur(10px);
  transition: border-color 0.25s ease, background 0.25s ease, box-shadow 0.25s ease;
}

body.dark .nav {
  border-color: var(--surface-border-dark);
  background: rgba(9, 13, 35, 0.78);
}

.nav--scrolled {
  box-shadow: 0 8px 28px rgba(26, 36, 56, 0.1);
}

body.dark .nav--scrolled {
  box-shadow: 0 12px 34px rgba(0, 0, 0, 0.32);
}

.nav__logo {
  font-family: "Chakra Petch", "Segoe UI", sans-serif;
  font-weight: 700;
  letter-spacing: 0.2em;
  font-size: 1.08rem;
}

.nav__links {
  display: flex;
  gap: 1.15rem;
  flex-wrap: wrap;
}

.nav-link {
  color: inherit;
  text-decoration: none;
  font-size: 0.93rem;
  letter-spacing: 0.07em;
  position: relative;
  padding-bottom: 0.4rem;
}

.nav-link:hover {
  color: var(--carrier);
}

.nav-wave {
  position: absolute;
  left: -2px;
  right: -2px;
  bottom: -8px;
  height: 18px;
  opacity: 0;
  transition: opacity 0.2s ease;
}

.nav-wave svg {
  width: 100%;
  height: 100%;
}

.nav-wave path {
  fill: none;
  stroke: var(--carrier);
  stroke-width: 1.7;
  filter: drop-shadow(0 0 4px var(--glow-carrier));
}

.nav-link.signal-hover .nav-wave,
.nav-link.signal-release .nav-wave {
  opacity: 1;
}

.nav__actions {
  display: flex;
  gap: 0.48rem;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.nav__toggle {
  display: none;
}

.theme-toggle,
.scope-toggle {
  border: 1px solid var(--surface-border-light);
  background: rgba(255, 255, 255, 0.5);
  color: inherit;
  border-radius: 999px;
  padding: 0.46rem 0.88rem;
  font-family: "Chakra Petch", "Segoe UI", sans-serif;
  letter-spacing: 0.06em;
  font-size: 0.74rem;
  cursor: pointer;
  transition: border-color 0.2s ease, transform 0.2s ease, color 0.2s ease;
}

body.dark .theme-toggle,
body.dark .scope-toggle {
  border-color: var(--surface-border-dark);
}

.theme-toggle:hover,
.scope-toggle:hover {
  transform: translateY(-1px);
  color: var(--carrier);
}

.scope-toggle.active {
  border-color: var(--carrier);
  color: var(--carrier);
}

main {
  position: relative;
  z-index: 12;
}

.hero {
  position: relative;
  min-height: 92vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding: 4.2rem 1rem 3rem;
}

#heroCarrierCanvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
  opacity: 0.82;
}

#aboutThreeCanvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
  opacity: 0.72;
}

.about__wave-label {
  position: absolute;
  bottom: 0.9rem;
  right: 1.5rem;
  z-index: 2;
  font-family: "Share Tech Mono", "Courier New", monospace;
  font-size: 0.62rem;
  letter-spacing: 0.1em;
  color: var(--carrier);
  opacity: 0.38;
  pointer-events: none;
}

.hero__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(146, 191, 255, 0.1) 1px, transparent 1px),
    linear-gradient(90deg, rgba(146, 191, 255, 0.1) 1px, transparent 1px);
  background-size: 90px 90px;
  opacity: 0.18;
  z-index: 1;
}

.hero__layer {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.58;
  z-index: 1;
}

.layer-one {
  background: radial-gradient(circle at 18% 18%, rgba(59, 130, 214, 0.18), transparent 44%);
}

.layer-two {
  background: radial-gradient(circle at 82% 24%, rgba(42, 95, 173, 0.14), transparent 42%);
}

body.dark .layer-one {
  background: radial-gradient(circle at 18% 18%, rgba(58, 134, 255, 0.66), transparent 44%);
}

body.dark .layer-two {
  background: radial-gradient(circle at 82% 24%, rgba(123, 44, 191, 0.56), transparent 42%);
}

.layer-three {
  background: radial-gradient(circle at 50% 83%, rgba(5, 9, 28, 0.12), transparent 54%);
}

body.dark .layer-three {
  background: radial-gradient(circle at 50% 83%, rgba(5, 9, 28, 0.82), transparent 54%);
}

.hero__content {
  position: relative;
  z-index: 3;
  max-width: 780px;
  width: 100%;
  margin: 0 auto;
}


.hero__intro {
  margin: 0;
  font-family: "Share Tech Mono", "Courier New", monospace;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  font-size: 0.78rem;
  color: var(--carrier);
  opacity: 0;
  animation: rise-in 0.85s ease forwards;
}

.hero__intro::after {
  content: "_";
  animation: blink-cursor 1s step-end infinite;
  opacity: 0.7;
}

@keyframes blink-cursor {
  0%, 100% { opacity: 0.7; }
  50% { opacity: 0; }
}

.hero__name {
  margin: 0.44rem 0 0.38rem;
  font-family: "Chakra Petch", "Segoe UI", sans-serif;
  font-weight: 700;
  letter-spacing: 0.12em;
  font-size: clamp(3rem, 9vw, 6rem);
}

.hero__title {
  margin: 0;
  font-family: "Chakra Petch", "Segoe UI", sans-serif;
  font-size: clamp(1.04rem, 1.9vw, 1.46rem);
  line-height: 1.5;
}

.hero__tagline {
  margin-top: 1rem;
  max-width: 580px;
  font-size: 1.02rem;
  line-height: 1.72;
  opacity: 0;
  animation: rise-in 0.9s ease 0.18s forwards;
}

.hero__cta {
  margin-top: 1.65rem;
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.btn {
  text-decoration: none;
  color: inherit;
  border: 1px solid currentColor;
  border-radius: 999px;
  padding: 0.8rem 1.2rem;
  text-transform: uppercase;
  font-family: "Chakra Petch", "Segoe UI", sans-serif;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  transition: transform 0.2s ease, box-shadow 0.2s ease, color 0.2s ease;
}

.primary-btn {
  color: #fff;
  border-color: transparent;
  background: linear-gradient(135deg, var(--carrier), var(--modulation));
}

.primary-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 30px var(--glow-carrier);
}

.ghost-btn:hover {
  transform: translateY(-2px);
  color: var(--carrier);
}

.section {
  position: relative;
  max-width: 1180px;
  margin: 0 auto;
  padding: 5rem 1.5rem 2.5rem;
}

.about {
  max-width: none;
  width: 100%;
  min-height: 82vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.about > *:not(#aboutThreeCanvas):not(.about__wave-label) {
  position: relative;
  z-index: 1;
}

.section__heading {
  text-align: center;
  margin-bottom: 2.5rem;
}

.eyebrow {
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 0.34em;
  font-family: "Chakra Petch", "Segoe UI", sans-serif;
  font-size: 0.72rem;
  color: var(--muted-light);
}

body.dark .eyebrow {
  color: var(--muted-dark);
}

.section__heading h2 {
  margin: 0.62rem 0 0;
  font-family: "Chakra Petch", "Segoe UI", sans-serif;
  font-size: clamp(1.7rem, 4vw, 2.7rem);
}

.section__heading h2::after {
  content: "";
  display: block;
  width: 48px;
  height: 2px;
  margin: 0.7rem auto 0;
  background: linear-gradient(90deg, var(--carrier), var(--modulation));
  border-radius: 1px;
  opacity: 0.6;
}

.about__content,
.skill-card,
.project-card,
.contact__item {
  background: var(--surface-light);
  border: 1px solid var(--surface-border-light);
  border-radius: 18px;
  box-shadow: 0 8px 30px rgba(26, 36, 56, 0.08);
  position: relative;
  overflow: hidden;
}

.about__content {
  backdrop-filter: blur(8px);
}

.skill-card::before,
.project-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--carrier), var(--modulation), transparent);
  opacity: 0.5;
  transition: opacity 0.3s ease;
}

.skill-card:hover::before,
.project-card:hover::before {
  opacity: 1;
}

.skill-card h3,
.project-card h3,
.contact__item h3 {
  font-family: "Chakra Petch", "Segoe UI", sans-serif;
  font-size: 1.1rem;
  letter-spacing: 0.04em;
  margin: 0 0 0.65rem;
}

.skill-card p,
.project-card p,
.contact__item p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.75;
  opacity: 0.78;
}

.skill-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.skill-list li {
  position: relative;
  padding-left: 1rem;
  font-size: 0.92rem;
  line-height: 1.7;
  opacity: 0.78;
}

.skill-list li + li {
  margin-top: 0.25rem;
}

.skill-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.65em;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--carrier);
  opacity: 0.55;
}

body.dark .about__content,
body.dark .skill-card,
body.dark .project-card,
body.dark .contact__item {
  background: var(--surface-dark);
  border-color: var(--surface-border-dark);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.36);
}

.about__content {
  padding: 2rem 2.2rem;
  line-height: 1.8;
  max-width: 720px;
  margin: 0 auto;
  font-size: 0.96rem;
}

.traits {
  list-style: none;
  padding: 0;
  margin: 1.2rem 0 0;
  display: flex;
  gap: 0.55rem;
  flex-wrap: wrap;
}

.traits li {
  border-radius: 999px;
  border: 1px solid var(--surface-border-light);
  padding: 0.42rem 0.82rem;
  font-family: "Chakra Petch", "Segoe UI", sans-serif;
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  transition: border-color 0.25s ease, color 0.25s ease;
}

.traits li:hover {
  border-color: var(--carrier);
  color: var(--carrier);
}

body.dark .traits li {
  border-color: var(--surface-border-dark);
}

body.dark .traits li:hover {
  border-color: var(--carrier);
}

.skills__grid,
.projects__grid,
.contact__grid {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.skills__grid {
  counter-reset: skill-counter;
}

.skill-card {
  counter-increment: skill-counter;
}

.skill-card h3::before {
  content: counter(skill-counter, decimal-leading-zero) ". ";
  font-family: "Share Tech Mono", "Courier New", monospace;
  font-size: 0.78rem;
  color: var(--carrier);
  opacity: 0.5;
  margin-right: 0.2rem;
}

.skill-card,
.project-card,
.contact__item {
  padding: 1.5rem 1.6rem;
  transition: box-shadow 0.25s ease, border-color 0.25s ease;
}

.skill-card:hover,
.project-card:hover,
.contact__item:hover {
  box-shadow: 0 16px 40px rgba(26, 36, 56, 0.12);
  border-color: color-mix(in srgb, var(--carrier) 45%, var(--surface-border-light));
}

body.dark .skill-card:hover,
body.dark .project-card:hover,
body.dark .contact__item:hover {
  box-shadow: 0 24px 46px rgba(0, 0, 0, 0.48);
  border-color: color-mix(in srgb, var(--carrier) 48%, var(--surface-border-dark));
}

.signal-reactive.signal-hit {
  box-shadow: 0 0 0 1px color-mix(in srgb, var(--carrier) 60%, transparent), 0 0 26px var(--glow-carrier);
}

.animate-on-signal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.animate-on-signal.visible {
  opacity: 1;
  transform: translateY(0);
}

.node-section.signal-arrived::after {
  content: "";
  position: absolute;
  left: 10%;
  right: 10%;
  top: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--carrier), transparent);
  opacity: 0.45;
}

/* ── Signal Dividers (Tx/Rx) ── */
.signal-divider {
  height: 120px;
  margin: 0 auto;
  max-width: 1180px;
  padding: 0 1rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  position: relative;
}

.divider-canvas {
  flex: 1;
  height: 100%;
  display: block;
}

.divider-label {
  font-family: "Share Tech Mono", "Courier New", monospace;
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  color: var(--muted-light);
  text-transform: uppercase;
  flex-shrink: 0;
  transition: color 0.3s ease, text-shadow 0.3s ease;
  user-select: none;
}

body.dark .divider-label {
  color: var(--muted-dark);
}

.divider-tx {
  opacity: 0.6;
}

.divider-rx {
  opacity: 0.6;
}

/* ── FFT Skills Visualization ── */
.fft-wrap {
  margin-bottom: 1.5rem;
}

.fft-heading {
  margin: 0 0 2rem;
  text-align: center;
  font-family: "Share Tech Mono", "Courier New", monospace;
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--carrier);
  opacity: 0.55;
}


.fft-axis-tick {
  position: absolute;
  left: 0;
  top: 0;
  font-family: "Share Tech Mono", "Courier New", monospace;
  font-size: 0.72rem;
  color: var(--carrier);
  opacity: 0.55;
  pointer-events: none;
  white-space: nowrap;
  transform: translate(-100%, -50%);
  padding-right: 4px;
}

.fft-axis-xlabel {
  position: absolute;
  left: 0;
  top: 0;
  font-family: "Share Tech Mono", "Courier New", monospace;
  font-size: 0.75rem;
  letter-spacing: 0.10em;
  color: var(--carrier);
  opacity: 0.50;
  pointer-events: none;
  white-space: nowrap;
  transform: translate(-50%, 6px);
}

.fft-hint {
  position: absolute;
  bottom: 1rem;
  left: 50%;
  transform: translateX(-50%);
  margin: 0;
  font-family: "Share Tech Mono", "Courier New", monospace;
  font-size: 0.65rem;
  letter-spacing: 0.06em;
  color: var(--carrier);
  opacity: 0.35;
  pointer-events: none;
  white-space: nowrap;
  transition: opacity 0.4s ease;
}

.fft-hint.hidden {
  opacity: 0;
}

.skills__subtitle {
  margin: 0 0 1rem;
  text-align: center;
  font-family: "Chakra Petch", "Segoe UI", sans-serif;
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  opacity: 0.4;
}

.fft-container {
  position: relative;
  width: 100%;
  height: 380px;
  border-radius: 18px;
  overflow: visible;
}

#fftCanvas {
  width: 100%;
  height: 100%;
  display: block;
}

.fft-labels {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.fft-label {
  position: absolute;
  top: 0;
  left: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.15rem;
  padding: 0.4rem 0.7rem;
  background: var(--surface-light);
  border: 1px solid var(--surface-border-light);
  border-radius: 10px;
  backdrop-filter: blur(6px);
  pointer-events: auto;
  opacity: 0;
  transition: opacity 0.3s ease, box-shadow 0.3s ease;
  white-space: nowrap;
}

body.dark .fft-label {
  background: var(--surface-dark);
  border-color: var(--surface-border-dark);
}

.fft-label__name {
  font-family: "Chakra Petch", "Segoe UI", sans-serif;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.fft-label__detail {
  font-size: 0.68rem;
  opacity: 0.6;
  letter-spacing: 0.02em;
}

.fft-label__pct {
  font-family: "Share Tech Mono", "Courier New", monospace;
  font-size: 0.66rem;
  color: var(--carrier);
  opacity: 0.7;
}


/* ── Card Tilt ── */
.signal-reactive {
  transform-style: preserve-3d;
  will-change: transform;
}

@keyframes rise-in {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.contact__item {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.35rem;
}

.contact__label {
  font-family: "Share Tech Mono", "Courier New", monospace;
  font-size: 0.72rem;
  color: var(--carrier);
  opacity: 0.5;
  letter-spacing: 0.1em;
}

.contact__icon {
  width: 28px;
  height: 28px;
  color: var(--carrier);
  opacity: 0.45;
  transition: opacity 0.25s ease;
}

.contact__item:hover .contact__icon {
  opacity: 0.8;
}

.contact__item h3 {
  margin-bottom: 0.15rem;
}

.contact__item p {
  opacity: 0.6;
  margin-bottom: 0.3rem;
}

.contact__item .btn {
  margin-top: auto;
}

.arch-hl {
  color: var(--carrier);
  text-shadow: 0 0 8px var(--glow-carrier);
}

.footer {
  position: relative;
  z-index: 12;
  padding: 2.5rem 1rem;
  text-align: center;
}

.footer__inner {
  max-width: 1180px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  font-size: 0.82rem;
  opacity: 0.55;
}

.footer__brand {
  font-family: "Chakra Petch", "Segoe UI", sans-serif;
  font-weight: 600;
  letter-spacing: 0.12em;
}

.footer__sep {
  width: 1px;
  height: 14px;
  background: currentColor;
  opacity: 0.3;
}

.footer__note {
  font-size: 0.78rem;
  letter-spacing: 0.04em;
}

/* ── Signal Acquisition Loader ── */
.loader-overlay {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: #0a0e1a;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  transition: opacity 0.6s ease;
}

.loader-overlay canvas {
  width: 90%;
  max-width: 800px;
  height: 45%;
  max-height: 360px;
}

.loader-hud {
  display: flex;
  align-items: center;
  gap: 1.2rem;
  margin-top: 1.5rem;
}

.loader-status {
  font-family: "Share Tech Mono", "Courier New", monospace;
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  color: rgba(180, 210, 255, 0.7);
  transition: color 0.4s ease;
}

.loader-meter {
  display: flex;
  gap: 3px;
}

.loader-meter span {
  display: block;
  width: 5px;
  height: 16px;
  background: rgba(180, 210, 255, 0.1);
  border-radius: 1px;
  transition: background 0.3s ease, box-shadow 0.3s ease;
}

.loader-meter span.active {
  background: #3a86ff;
  box-shadow: 0 0 8px rgba(58, 134, 255, 0.5);
}

.fm-dial {
  position: relative;
  width: 90%;
  max-width: 800px;
  height: 48px;
  margin-top: 1.2rem;
  overflow: hidden;
  border-top: 1px solid rgba(58, 134, 255, 0.15);
  border-bottom: 1px solid rgba(58, 134, 255, 0.15);
}

.fm-dial__needle {
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 2px;
  background: #3a86ff;
  box-shadow: 0 0 10px rgba(58, 134, 255, 0.6);
  z-index: 2;
  transform: translateX(-50%);
}

.fm-dial__strip {
  position: absolute;
  top: 0;
  height: 100%;
  display: flex;
  align-items: center;
  white-space: nowrap;
  transition: none;
}

.fm-dial__strip .fm-tick {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 36px;
  flex-shrink: 0;
}

.fm-tick__line {
  width: 1px;
  height: 12px;
  background: rgba(180, 210, 255, 0.25);
}

.fm-tick__line--major {
  height: 20px;
  background: rgba(180, 210, 255, 0.4);
}

.fm-tick__label {
  font-family: "Share Tech Mono", "Courier New", monospace;
  font-size: 0.58rem;
  color: rgba(180, 210, 255, 0.35);
  margin-top: 2px;
  letter-spacing: 0.05em;
}

.fm-dial.locked .fm-tick__label {
  color: rgba(180, 210, 255, 0.15);
}

.fm-dial.locked .fm-tick.target .fm-tick__label {
  color: #3a86ff;
}

.fm-dial.locked .fm-tick.target .fm-tick__line {
  background: #3a86ff;
  box-shadow: 0 0 6px rgba(58, 134, 255, 0.5);
}

.loader-skip {
  position: absolute;
  bottom: 2rem;
  font-family: "Share Tech Mono", "Courier New", monospace;
  font-size: 0.66rem;
  letter-spacing: 0.12em;
  color: rgba(180, 210, 255, 0.25);
  z-index: 20;
}

/* Gate portfolio content during loading */
body.signal-loading main,
body.signal-loading .nav-shell,
body.signal-loading .footer,
body.signal-loading #signalCanvas,
body.signal-loading .progress-wrap {
  opacity: 0;
  pointer-events: none;
}

body.signal-loaded main,
body.signal-loaded .nav-shell,
body.signal-loaded .footer,
body.signal-loaded #signalCanvas,
body.signal-loaded .progress-wrap {
  opacity: 1;
  transition: opacity 0.8s ease;
}

/* Defer rise-in animations until loaded */
body.signal-loading .hero__intro,
body.signal-loading .hero__tagline {
  animation: none;
  opacity: 0;
}

@media (max-width: 980px) {
  .nav {
    border-radius: 22px;
    justify-content: center;
  }

  .nav__links {
    justify-content: center;
  }

  .nav__actions {
    justify-content: center;
  }
}

@media (max-width: 760px) {
  /* ── Nav hamburger ── */
  .nav {
    border-radius: 14px;
    flex-wrap: wrap;
    padding: 0.6rem 1rem;
    justify-content: space-between;
  }

  .nav__toggle {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 36px;
    height: 36px;
    background: none;
    border: none;
    color: inherit;
    cursor: pointer;
    padding: 6px;
    border-radius: 8px;
  }

  .nav__toggle span {
    display: block;
    width: 100%;
    height: 2px;
    background: currentColor;
    border-radius: 1px;
    transition: transform 0.22s ease, opacity 0.22s ease;
  }

  .nav--open .nav__toggle span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }

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

  .nav--open .nav__toggle span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  .nav__links,
  .nav__actions {
    display: none;
    width: 100%;
  }

  .nav--open .nav__links {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.2rem;
    padding-top: 0.5rem;
  }

  .nav--open .nav__actions {
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    gap: 0.5rem;
    padding-bottom: 0.5rem;
  }

  .nav--open .nav-link {
    padding: 0.5rem 0;
    font-size: 1rem;
    width: 100%;
  }

  /* ── Layout adjustments ── */
  .hero {
    min-height: 86vh;
    padding-top: 3.7rem;
  }

  .hero__cta {
    flex-direction: column;
    align-items: flex-start;
  }

  .section {
    padding: 3.5rem 1rem 2rem;
  }

  .about__content {
    padding: 1.5rem 1.25rem;
  }

  .fft-heading {
    font-size: 0.65rem;
    letter-spacing: 0.10em;
  }

  .signal-divider {
    height: 90px;
  }

  .fft-container {
    height: 280px;
  }

  .footer__inner {
    flex-direction: column;
    gap: 0.5rem;
    text-align: center;
  }

  .footer__sep {
    display: none;
  }
}

@media (max-width: 600px) {
  .fft-label {
    padding: 0.25rem 0.4rem;
    border-radius: 7px;
  }

  .fft-label__name {
    font-size: 0.68rem;
  }

  .fft-label__detail {
    display: none;
  }

  .fft-label__pct {
    font-size: 0.58rem;
  }
}

@media (max-width: 480px) {
  .nav-shell {
    padding: 0.6rem 0.6rem;
  }

  .hero {
    padding: 3.2rem 0.75rem 2.5rem;
  }

  .hero__tagline {
    font-size: 0.95rem;
  }

  .section {
    padding: 3rem 0.75rem 1.75rem;
  }

  .about__content {
    padding: 1.25rem 1rem;
    font-size: 0.92rem;
  }

  .skills__grid,
  .projects__grid,
  .contact__grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .skill-card,
  .project-card,
  .contact__item {
    padding: 1.25rem 1.1rem;
  }

  .btn {
    padding: 0.72rem 1rem;
    font-size: 0.72rem;
  }

  .fft-container {
    height: 240px;
  }

  .about__wave-label {
    display: none;
  }
}