/* =========================================================
   VYRION — Feuille de style principale
   Fond noir #080808, accents colorés, typo Unbounded / Rajdhani
   ========================================================= */

/* ---------- Reset & base ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --bg: #080808;
  --bg-soft: #0f0f0f;
  --bg-card: #121212;
  --fg: #f5f5f5;
  --fg-muted: #9a9a9a;
  --fg-dim: #5a5a5a;
  --border: #1f1f1f;

  --c-blue: #00AAFF;
  --c-violet: #7C4DFF;
  --c-pink: #FF2D78;
  --c-green: #39FF14;
  --c-yellow: #FFE600;

  --accent: var(--c-blue);

  --font-display: 'Unbounded', system-ui, sans-serif;
  --font-body: 'Rajdhani', system-ui, sans-serif;

  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
}

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 17px;
  line-height: 1.55;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  min-height: 100vh;
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.25s var(--ease-out);
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

input, textarea, select {
  font-family: inherit;
  font-size: inherit;
}

/* ---------- Typography ---------- */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -0.01em;
  text-transform: uppercase;
}

h1 {
  font-size: clamp(2.5rem, 7vw, 6.25rem);
  font-weight: 900;
}
h2 {
  font-size: clamp(2rem, 4.5vw, 3.75rem);
  font-weight: 900;
}
h3 {
  font-size: clamp(1.25rem, 2vw, 1.75rem);
  font-weight: 800;
  letter-spacing: 0.02em;
}
h4 {
  font-size: 1.1rem;
  font-weight: 800;
  letter-spacing: 0.04em;
}

p {
  font-weight: 600;
  color: var(--fg-muted);
  max-width: 60ch;
}

.eyebrow {
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--fg-dim);
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
}

.eyebrow::before {
  content: '';
  width: 1.5rem;
  height: 1px;
  background: var(--accent);
  display: inline-block;
}

/* ---------- Layout ---------- */
.container {
  width: min(1280px, 92%);
  margin: 0 auto;
}

.section {
  padding: clamp(4rem, 10vw, 8rem) 0;
  position: relative;
}

.section--tight {
  padding: clamp(3rem, 7vw, 5rem) 0;
}

main {
  padding-top: 80px; /* room for fixed header */
}

/* ---------- Header ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(8, 8, 8, 0.72);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s var(--ease-out), background 0.3s var(--ease-out);
}

.site-header.is-scrolled {
  border-bottom-color: var(--border);
  background: rgba(8, 8, 8, 0.92);
}

.site-header__inner {
  height: 80px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.4rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.brand img,
.brand svg {
  height: 36px;
  width: auto;
  transition: transform 0.5s var(--ease-out);
}

.brand:hover img,
.brand:hover svg {
  transform: rotate(-6deg);
}

.nav {
  display: flex;
  align-items: center;
  gap: clamp(1rem, 2.5vw, 2.4rem);
}

.nav a {
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--fg-muted);
  position: relative;
  padding: 0.4rem 0;
}

.nav a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  height: 2px;
  width: 0;
  background: var(--accent);
  transition: width 0.4s var(--ease-out);
}

.nav a:hover,
.nav a.is-active {
  color: var(--fg);
}

.nav a:hover::after,
.nav a.is-active::after {
  width: 100%;
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  position: relative;
  z-index: 110;
}

.nav-toggle span {
  position: absolute;
  left: 10px;
  right: 10px;
  height: 2px;
  background: var(--fg);
  transition: transform 0.3s var(--ease-out), opacity 0.2s var(--ease-out), top 0.3s var(--ease-out);
}

.nav-toggle span:nth-child(1) { top: 16px; }
.nav-toggle span:nth-child(2) { top: 21px; }
.nav-toggle span:nth-child(3) { top: 26px; }

.nav-toggle.is-open span:nth-child(1) { top: 21px; transform: rotate(45deg); }
.nav-toggle.is-open span:nth-child(2) { opacity: 0; }
.nav-toggle.is-open span:nth-child(3) { top: 21px; transform: rotate(-45deg); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 1rem 1.6rem;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  border: 1px solid var(--fg);
  color: var(--fg);
  background: transparent;
  position: relative;
  overflow: hidden;
  transition: color 0.3s var(--ease-out), border-color 0.3s var(--ease-out);
  cursor: pointer;
}

.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--fg);
  transform: translateY(101%);
  transition: transform 0.45s var(--ease-out);
  z-index: -1;
}

.btn:hover {
  color: var(--bg);
}

.btn:hover::before {
  transform: translateY(0);
}

.btn--accent {
  border-color: var(--accent);
  color: var(--accent);
}

.btn--accent::before {
  background: var(--accent);
}

.btn--accent:hover {
  color: var(--bg);
}

.btn .arrow {
  display: inline-block;
  transition: transform 0.3s var(--ease-out);
}

.btn:hover .arrow {
  transform: translateX(4px);
}

/* ---------- Hero ---------- */
.hero {
  min-height: calc(100vh - 80px);
  display: flex;
  align-items: center;
  position: relative;
  padding: clamp(4rem, 10vw, 8rem) 0;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 120vmax;
  height: 120vmax;
  transform: translate(-50%, -50%);
  background:
    radial-gradient(circle at 30% 30%, rgba(124, 77, 255, 0.18), transparent 45%),
    radial-gradient(circle at 70% 70%, rgba(0, 170, 255, 0.14), transparent 45%),
    radial-gradient(circle at 50% 50%, rgba(255, 45, 120, 0.08), transparent 50%);
  filter: blur(20px);
  pointer-events: none;
  z-index: 0;
  animation: drift 24s linear infinite;
}

@keyframes drift {
  0%   { transform: translate(-50%, -50%) rotate(0deg); }
  100% { transform: translate(-50%, -50%) rotate(360deg); }
}

.hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
}

.hero__title {
  font-size: clamp(2.8rem, 9vw, 8.5rem);
  line-height: 0.95;
  font-weight: 900;
  text-transform: uppercase;
  max-width: 14ch;
}

.hero__title em {
  font-style: normal;
  background: linear-gradient(90deg, var(--c-blue), var(--c-violet), var(--c-pink));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero__sub {
  font-size: clamp(1.1rem, 1.6vw, 1.35rem);
  font-weight: 600;
  color: var(--fg-muted);
  max-width: 52ch;
  line-height: 1.5;
}

.hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 1rem;
}

.hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  margin-top: 4rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
}

.hero__meta-item .label {
  display: block;
  font-size: 0.78rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--fg-dim);
  margin-bottom: 0.3rem;
}

.hero__meta-item .value {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.hero__scroll {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  font-size: 0.75rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--fg-dim);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.6rem;
  z-index: 1;
}

.hero__scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--fg-dim), transparent);
  position: relative;
  overflow: hidden;
}

.hero__scroll-line::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 50%;
  background: var(--accent);
  animation: scrollPulse 2.4s var(--ease-in-out) infinite;
}

@keyframes scrollPulse {
  0%   { transform: translateY(-100%); }
  100% { transform: translateY(200%); }
}

/* ---------- Color strip ---------- */
.color-strip {
  width: 100%;
  height: auto;
  display: block;
  margin: clamp(2rem, 5vw, 4rem) 0;
}

/* ---------- Video placeholder ---------- */
.video-frame {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 1.2rem;
  text-align: center;
  padding: 2rem;
}

.video-frame::before,
.video-frame::after {
  content: '';
  position: absolute;
  background: var(--border);
}

.video-frame::before { top: 0; left: 0; width: 20%; height: 1px; }
.video-frame::after  { bottom: 0; right: 0; width: 20%; height: 1px; }

.video-frame__icon {
  width: 64px;
  height: 64px;
  border: 1px solid var(--fg-dim);
  border-radius: 50%;
  display: grid;
  place-items: center;
  color: var(--accent);
}

.video-frame__label {
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--fg-dim);
}

.video-frame__caption {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.1rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

/* ---------- Services grid ---------- */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1px;
  background: var(--border);
  margin-top: 3rem;
}

.service-card {
  background: var(--bg);
  padding: 2.4rem 1.8rem;
  position: relative;
  transition: background 0.4s var(--ease-out);
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 0;
  background: var(--accent);
  transition: height 0.5s var(--ease-out);
}

.service-card:hover {
  background: var(--bg-soft);
}

.service-card:hover::before {
  height: 100%;
}

.service-card__num {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 0.95rem;
  letter-spacing: 0.1em;
  color: var(--fg-dim);
  margin-bottom: 1.2rem;
  display: flex;
  align-items: center;
  gap: 0.8rem;
}

.service-card__num::after {
  content: '';
  height: 1px;
  flex: 1;
  background: var(--border);
}

.service-card__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.35rem;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  margin-bottom: 0.8rem;
}

.service-card__desc {
  font-size: 0.95rem;
  line-height: 1.5;
  color: var(--fg-muted);
}

/* Colored accent variants */
.service-card[data-color="blue"]::before   { background: var(--c-blue); }
.service-card[data-color="violet"]::before { background: var(--c-violet); }
.service-card[data-color="pink"]::before   { background: var(--c-pink); }
.service-card[data-color="green"]::before  { background: var(--c-green); }
.service-card[data-color="yellow"]::before { background: var(--c-yellow); }

/* ---------- Realisations grid ---------- */
.real-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.25rem;
  margin-top: 3rem;
}

.real-tile {
  position: relative;
  aspect-ratio: 4 / 3;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color 0.4s var(--ease-out), transform 0.4s var(--ease-out);
}

.real-tile:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
}

.real-tile__inner {
  text-align: center;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.8rem;
}

.real-tile__plus {
  width: 56px;
  height: 56px;
  border: 1px solid var(--fg-dim);
  border-radius: 50%;
  display: grid;
  place-items: center;
  color: var(--accent);
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 900;
  transition: transform 0.4s var(--ease-out), color 0.4s var(--ease-out), border-color 0.4s var(--ease-out);
}

.real-tile:hover .real-tile__plus {
  transform: rotate(90deg);
  border-color: var(--accent);
}

.real-tile__label {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 0.95rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--fg);
}

.real-tile__sub {
  font-size: 0.8rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--fg-dim);
}

/* category filter */
.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin: 2rem 0 0;
}

.filter {
  padding: 0.6rem 1.1rem;
  font-size: 0.8rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  border: 1px solid var(--border);
  color: var(--fg-muted);
  background: transparent;
  cursor: pointer;
  transition: all 0.3s var(--ease-out);
}

.filter:hover {
  color: var(--fg);
  border-color: var(--fg-dim);
}

.filter.is-active {
  background: var(--fg);
  color: var(--bg);
  border-color: var(--fg);
}

.real-grid .real-tile {
  transition: opacity 0.4s var(--ease-out), transform 0.4s var(--ease-out);
}

.real-tile.is-hidden {
  display: none;
}

/* ---------- About ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4rem;
  align-items: start;
}

@media (min-width: 900px) {
  .about-grid { grid-template-columns: 1.2fr 1fr; gap: 6rem; }
}

.about-lead {
  font-size: clamp(1.2rem, 1.8vw, 1.5rem);
  color: var(--fg);
  line-height: 1.45;
  margin-top: 1.5rem;
  max-width: 32ch;
}

.about-body p + p {
  margin-top: 1.2rem;
}

.signature {
  margin-top: 2.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.signature .name {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.4rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.signature .role {
  font-size: 0.85rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--fg-dim);
}

/* ---------- Contact ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4rem;
  align-items: start;
}

@media (min-width: 900px) {
  .contact-grid { grid-template-columns: 1fr 1fr; gap: 5rem; }
}

.contact-form {
  display: grid;
  gap: 1.4rem;
}

.field {
  display: grid;
  gap: 0.5rem;
}

.field label {
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 0.8rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--fg-muted);
}

.field input,
.field textarea,
.field select {
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--border);
  padding: 0.8rem 0;
  color: var(--fg);
  font-weight: 600;
  font-size: 1rem;
  transition: border-color 0.3s var(--ease-out);
  outline: none;
  width: 100%;
}

.field input:focus,
.field textarea:focus,
.field select:focus {
  border-bottom-color: var(--accent);
}

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

.field--error input,
.field--error textarea {
  border-bottom-color: var(--c-pink);
}

.field-error {
  display: none;
  font-size: 0.8rem;
  color: var(--c-pink);
  letter-spacing: 0.05em;
}

.field--error .field-error {
  display: block;
}

.form-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1.2rem;
  margin-top: 1rem;
}

.form-note {
  font-size: 0.85rem;
  color: var(--fg-dim);
  letter-spacing: 0.04em;
}

.form-success {
  display: none;
  padding: 1rem 1.2rem;
  border: 1px solid var(--c-green);
  color: var(--c-green);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.85rem;
}

.form-success.is-visible { display: block; }

.contact-info {
  display: grid;
  gap: 2rem;
}

.contact-block {
  display: grid;
  gap: 0.4rem;
}

.contact-block .label {
  font-size: 0.78rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--fg-dim);
}

.contact-block .value {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.05rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.contact-block a:hover {
  color: var(--accent);
}

.socials {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 1rem;
}

.social {
  width: 48px;
  height: 48px;
  border: 1px solid var(--border);
  display: grid;
  place-items: center;
  color: var(--fg-muted);
  transition: color 0.3s var(--ease-out), border-color 0.3s var(--ease-out), background 0.3s var(--ease-out);
}

.social:hover {
  color: var(--bg);
  background: var(--accent);
  border-color: var(--accent);
}

.social svg { width: 18px; height: 18px; }

/* ---------- Footer ---------- */
.site-footer {
  background: var(--bg);
  border-top: 1px solid var(--border);
  padding: 4rem 0 2rem;
  margin-top: 4rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
}

@media (min-width: 800px) {
  .footer-grid { grid-template-columns: 2fr 1fr 1fr; }
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  max-width: 360px;
}

.footer-brand .brand img,
.footer-brand .brand svg {
  height: 48px;
}

.footer-brand p {
  font-size: 0.95rem;
  color: var(--fg-muted);
}

.footer-col h4 {
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 0.8rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--fg-dim);
  margin-bottom: 1.2rem;
}

.footer-col ul {
  list-style: none;
  display: grid;
  gap: 0.6rem;
}

.footer-col a {
  color: var(--fg-muted);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.footer-col a:hover { color: var(--fg); }

.footer-strip {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  padding-top: 2rem;
  margin-top: 3rem;
  border-top: 1px solid var(--border);
  font-size: 0.8rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--fg-dim);
}

/* ---------- Scroll reveal ---------- */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.9s var(--ease-out), transform 0.9s var(--ease-out);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal--zoom {
  transform: scale(0.94) translateY(20px);
}

.reveal--zoom.is-visible {
  transform: scale(1) translateY(0);
}

/* stagger helper */
.reveal[data-delay="1"] { transition-delay: 0.08s; }
.reveal[data-delay="2"] { transition-delay: 0.16s; }
.reveal[data-delay="3"] { transition-delay: 0.24s; }
.reveal[data-delay="4"] { transition-delay: 0.32s; }
.reveal[data-delay="5"] { transition-delay: 0.40s; }
.reveal[data-delay="6"] { transition-delay: 0.48s; }

/* Parallax helper (light, opt-in) */
[data-parallax] {
  will-change: transform;
}

/* ---------- Process timeline ---------- */
.process {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  margin-top: 3rem;
  border-top: 1px solid var(--border);
}

.process__step {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 1.5rem;
  padding: 1.8rem 0;
  border-bottom: 1px solid var(--border);
  align-items: start;
  transition: padding 0.4s var(--ease-out);
}

.process__step:hover {
  padding-left: 1rem;
}

.process__num {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.2rem;
  letter-spacing: 0.04em;
  color: var(--accent);
}

.process__step h3 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.15rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: 0.3rem;
}

.process__step p {
  font-size: 0.95rem;
  color: var(--fg-muted);
}

/* ---------- Big quote block ---------- */
.quote {
  padding: clamp(3rem, 8vw, 6rem) 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  text-align: center;
}

.quote blockquote {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.6rem, 3.6vw, 2.8rem);
  line-height: 1.15;
  letter-spacing: -0.005em;
  text-transform: uppercase;
  max-width: 22ch;
  margin: 0 auto;
}

.quote blockquote em {
  font-style: normal;
  background: linear-gradient(90deg, var(--c-blue), var(--c-pink));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ---------- Mobile nav drawer ---------- */
@media (max-width: 820px) {
  main { padding-top: 72px; }

  .site-header__inner { height: 72px; }

  .nav-toggle { display: block; }

  /* Hide desktop nav inline by default on mobile */
  .nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    width: 100%;
    height: 100dvh;
    height: 100vh; /* fallback */
    background: var(--bg);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 0.4rem;
    padding: 5rem 1.5rem 3rem;
    transform: translateY(-100%);
    visibility: hidden;
    opacity: 0;
    pointer-events: none;
    transition: transform 0.5s var(--ease-out),
                opacity 0.4s var(--ease-out),
                visibility 0s linear 0.5s;
    z-index: 90;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
  }

  .nav.is-open {
    transform: translateY(0);
    visibility: visible;
    opacity: 1;
    pointer-events: auto;
    transition: transform 0.5s var(--ease-out),
                opacity 0.4s var(--ease-out),
                visibility 0s linear 0s;
  }

  .nav a {
    font-family: var(--font-display);
    font-weight: 800;
    font-size: clamp(1.3rem, 5vw, 1.6rem);
    letter-spacing: 0.05em;
    padding: 0.6rem 0;
    width: 100%;
    text-align: center;
  }

  /* Active link highlighted when menu is open */
  .nav a.is-active::after {
    width: 60px;
    left: 50%;
    transform: translateX(-50%);
  }

  /* Ensure toggle stays above the drawer */
  .nav-toggle { z-index: 110; }
  .site-header { z-index: 100; }
}

/* Safety: ensure nav is never displayed inline on very small screens
   even if the media query is somehow bypassed (e.g. older browsers) */
@media (max-width: 820px) {
  html:not(.nav-open) .nav {
    pointer-events: none;
  }
}

/* ---------- Utilities ---------- */
.text-center { text-align: center; }
.text-muted { color: var(--fg-muted); }
.mt-1 { margin-top: 1rem; }
.mt-2 { margin-top: 2rem; }
.mt-3 { margin-top: 3rem; }
.mb-1 { margin-bottom: 1rem; }
.mb-2 { margin-bottom: 2rem; }
.mb-3 { margin-bottom: 3rem; }

.flex { display: flex; }
.flex-wrap { flex-wrap: wrap; }
.gap-1 { gap: 1rem; }
.gap-2 { gap: 2rem; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }

.divider {
  height: 1px;
  background: var(--border);
  width: 100%;
  margin: clamp(2rem, 5vw, 4rem) 0;
}

.accent-blue   { color: var(--c-blue); }
.accent-violet { color: var(--c-violet); }
.accent-pink   { color: var(--c-pink); }
.accent-green  { color: var(--c-green); }
.accent-yellow { color: var(--c-yellow); }

/* ---------- 404 ---------- */
.notfound {
  min-height: 70vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 4rem 1rem;
  gap: 1.5rem;
}

.notfound h1 {
  font-size: clamp(4rem, 12vw, 8rem);
}

.notfound p {
  margin: 0 auto;
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001s !important;
    transition-duration: 0.001s !important;
    scroll-behavior: auto !important;
  }
  .reveal { opacity: 1; transform: none; }
}

/* ---------- Mobile menu scroll lock (iOS-safe) ---------- */
html.nav-open,
html.nav-open body {
  overflow: hidden !important;
  overscroll-behavior: none;
}
@media (max-width: 820px) {
  html.nav-open body { position: fixed; width: 100%; }
}