/* ============================================================
   novAItech — style.css
   Palette sombre / moderne, responsive, effets hover
   ============================================================ */

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

:root {
  --bg:        #0d0f1a;
  --bg2:       #121526;
  --bg3:       #1a1d30;
  --card:      #161929;
  --border:    rgba(108, 99, 255, 0.18);
  --primary:   #6c63ff;
  --primary2:  #8b85ff;
  --cyan:      #00d4ff;
  --cyan2:     #00a8cc;
  --text:      #e8eaf0;
  --text2:     #a0a8c0;
  --text3:     #6b7494;
  --white:     #ffffff;
  --gradient:  linear-gradient(135deg, var(--primary) 0%, var(--cyan) 100%);
  --gradient2: linear-gradient(135deg, #1a1d30 0%, #0d0f1a 100%);
  --shadow:    0 4px 24px rgba(108, 99, 255, 0.15);
  --shadow-hover: 0 8px 40px rgba(108, 99, 255, 0.30);
  --radius:    12px;
  --radius-lg: 20px;
  --transition: 0.3s ease;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  font-size: 16px;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a  { color: inherit; text-decoration: none; }
ul { list-style: none; }

/* ---------- Utilitaires ---------- */
.container {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 24px;
}

.section { padding: 96px 0; }
.section--alt { background: var(--bg2); }

.tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--cyan);
  background: rgba(0, 212, 255, 0.1);
  border: 1px solid rgba(0, 212, 255, 0.25);
  border-radius: 30px;
  padding: 5px 14px;
  margin-bottom: 16px;
}

.section-title {
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 16px;
}

.section-title span {
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-sub {
  font-size: 1.05rem;
  color: var(--text2);
  max-width: 600px;
}

.section-header {
  text-align: center;
  margin-bottom: 60px;
}
.section-header .section-sub { margin: 0 auto; }

/* ---------- Boutons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: var(--transition);
  white-space: nowrap;
}

.btn-primary {
  background: var(--gradient);
  color: var(--white);
  box-shadow: 0 4px 20px rgba(108, 99, 255, 0.4);
}
.btn-primary:hover {
  box-shadow: 0 6px 30px rgba(108, 99, 255, 0.6);
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  color: var(--text);
  border: 1.5px solid var(--border);
}
.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary2);
  background: rgba(108, 99, 255, 0.07);
}

.btn-lg { padding: 17px 36px; font-size: 1rem; }

/* ---------- HEADER ---------- */
.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(13, 15, 26, 0.85);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
  transition: background var(--transition);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

.header__logo img {
  height: 48px;
  width: auto;
  display: block;
  mix-blend-mode: screen;
}

.nav__list {
  display: flex;
  align-items: center;
  gap: 36px;
}

.nav__list a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text2);
  transition: color var(--transition);
  position: relative;
}
.nav__list a::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0; right: 0;
  height: 2px;
  background: var(--gradient);
  border-radius: 2px;
  transform: scaleX(0);
  transition: transform var(--transition);
}
.nav__list a:hover,
.nav__list a.active { color: var(--white); }
.nav__list a:hover::after,
.nav__list a.active::after { transform: scaleX(1); }

.nav__cta { margin-left: 12px; }

/* Burger */
.burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
  background: none;
  border: none;
}
.burger span {
  display: block;
  width: 24px; height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: var(--transition);
}
.burger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.burger.open span:nth-child(2) { opacity: 0; }
.burger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile nav */
.nav--mobile {
  display: none;
  flex-direction: column;
  gap: 0;
  background: var(--bg2);
  border-top: 1px solid var(--border);
  padding: 16px 24px 24px;
}
.nav--mobile.open { display: flex; }
.nav--mobile a {
  padding: 12px 0;
  font-size: 1rem;
  font-weight: 500;
  color: var(--text2);
  border-bottom: 1px solid rgba(255,255,255,0.04);
  transition: color var(--transition);
}
.nav--mobile a:last-child { border-bottom: none; }
.nav--mobile a:hover { color: var(--white); }
.nav--mobile .btn { margin-top: 16px; justify-content: center; }

/* ---------- HERO ---------- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 120px 0 80px;
  background: var(--bg);
  position: relative;
  overflow: hidden;
}

/* Orbes décoratifs */
.hero::before,
.hero::after {
  content: '';
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  pointer-events: none;
  z-index: 0;
}
.hero::before {
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(108,99,255,0.18) 0%, transparent 70%);
  top: -100px; right: -150px;
}
.hero::after {
  width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(0,212,255,0.12) 0%, transparent 70%);
  bottom: -80px; left: -100px;
}

.hero__inner {
  position: relative;
  z-index: 1;
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(108, 99, 255, 0.1);
  border: 1px solid rgba(108, 99, 255, 0.3);
  border-radius: 30px;
  padding: 7px 16px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--primary2);
  letter-spacing: 0.05em;
  margin-bottom: 28px;
}
.hero__badge-dot {
  width: 7px; height: 7px;
  background: var(--cyan);
  border-radius: 50%;
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: 0.5; transform: scale(1.4); }
}

.hero__title {
  font-size: clamp(2.2rem, 5.5vw, 3.8rem);
  font-weight: 900;
  line-height: 1.1;
  margin-bottom: 24px;
  letter-spacing: -0.02em;
}
.hero__title span {
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__sub {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--text2);
  max-width: 580px;
  margin: 0 auto 44px;
  line-height: 1.7;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: center;
}

/* ---------- SERVICES CARDS ---------- */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  position: relative;
  overflow: hidden;
}
.card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--gradient);
  opacity: 0;
  transition: opacity var(--transition);
}
.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(108, 99, 255, 0.4);
}
.card:hover::before { opacity: 1; }

.card__icon {
  width: 52px; height: 52px;
  border-radius: 12px;
  background: rgba(108, 99, 255, 0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  font-size: 1.5rem;
  border: 1px solid rgba(108, 99, 255, 0.2);
  color: var(--primary2);
}

.card__title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--white);
}

.card__text {
  font-size: 0.92rem;
  color: var(--text2);
  line-height: 1.65;
  margin-bottom: 16px;
}

.card__link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--primary2);
  transition: color var(--transition), gap var(--transition);
}
.card__link:hover {
  color: var(--cyan);
  gap: 8px;
}

/* ---------- COMMENT ÇA MARCHE (steps) ---------- */
.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 32px;
  position: relative;
}

.step {
  text-align: center;
  padding: 40px 28px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  position: relative;
}

.step__number {
  width: 56px; height: 56px;
  background: var(--gradient);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  font-weight: 900;
  color: var(--white);
  margin: 0 auto 20px;
  box-shadow: 0 4px 20px rgba(108, 99, 255, 0.4);
}

.step__title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--white);
}

.step__text {
  font-size: 0.92rem;
  color: var(--text2);
  line-height: 1.65;
}

/* ---------- POURQUOI NOVAITECH ---------- */
.why-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
}

.why-card {
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: var(--transition);
}
.why-card:hover {
  border-color: rgba(0, 212, 255, 0.35);
  box-shadow: 0 4px 24px rgba(0, 212, 255, 0.1);
}

.why-card__icon {
  font-size: 2rem;
  margin-bottom: 14px;
  color: var(--primary2);
}
.why-card__icon svg { width: 30px; height: 30px; }

.why-card__title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--white);
}

.why-card__text {
  font-size: 0.88rem;
  color: var(--text2);
  line-height: 1.6;
}

/* ---------- CTA FINAL ---------- */
.cta-section {
  background: var(--bg2);
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 60% at 50% 50%, rgba(108,99,255,0.12) 0%, transparent 70%);
  pointer-events: none;
}

.cta-box {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 680px;
  margin: 0 auto;
}

.cta-box .section-title { margin-bottom: 20px; }

.cta-box p {
  color: var(--text2);
  font-size: 1.05rem;
  margin-bottom: 40px;
  line-height: 1.7;
}

/* ---------- FOOTER ---------- */
.footer {
  background: var(--bg);
  border-top: 1px solid var(--border);
  padding: 48px 0 32px;
}

.footer__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
  text-align: center;
}

.footer__logo img {
  height: auto;
  width: var(--footer-nav-width, 320px);
  max-width: 90vw;
  mix-blend-mode: screen;
  display: block;
}

.footer__nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px 28px;
}
.footer__nav a {
  font-size: 0.88rem;
  color: var(--text3);
  transition: color var(--transition);
}
.footer__nav a:hover { color: var(--text); }

.footer__copy {
  font-size: 0.8rem;
  color: var(--text3);
}
.footer__copy a { color: var(--primary2); }
.footer__copy a:hover { text-decoration: underline; }

/* ---------- PAGE SERVICES ---------- */
.services-full { }

.service-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  padding: 72px 0;
  border-bottom: 1px solid var(--border);
}
.service-block:last-child { border-bottom: none; }
.service-block--reverse { direction: rtl; }
.service-block--reverse > * { direction: ltr; }

.service-block__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 5rem;
  text-align: center;
  color: var(--primary2);
}
.service-block__icon svg {
  width: 96px;
  height: 96px;
  opacity: 0.85;
}

.service-block__tag { display: inline-block; }

.service-block__title {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 800;
  margin-bottom: 16px;
  color: var(--white);
}

.service-block__text {
  color: var(--text2);
  line-height: 1.75;
  margin-bottom: 20px;
}

.service-block__list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.service-block__list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.92rem;
  color: var(--text2);
}
.service-block__list li::before {
  content: '✓';
  color: var(--cyan);
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 1px;
}

/* ---------- PAGE À PROPOS ---------- */
.about-hero {
  padding: 160px 0 80px;
  background: var(--bg);
  position: relative;
  overflow: hidden;
}
.about-hero::before {
  content: '';
  position: absolute;
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(108,99,255,0.15) 0%, transparent 70%);
  top: 0; right: -100px;
  filter: blur(80px);
  pointer-events: none;
}

.about-hero__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.about-hero__content { }

.about-photo-wrap {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 2px solid var(--border);
  box-shadow: 0 8px 40px rgba(108, 99, 255, 0.2);
  width: 100%;
  max-width: 420px;
  margin: 0 auto;
}

.about-photo-wrap::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, transparent 60%, rgba(13,15,26,0.5) 100%);
  z-index: 1;
  pointer-events: none;
}

.about-photo {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}

/* Garde la classe pour ne pas casser le responsive existant */
.about-avatar {
  width: 280px; height: 280px;
  border-radius: 50%;
  background: var(--gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 7rem;
  margin: 0 auto;
  box-shadow: 0 0 60px rgba(108,99,255,0.3);
}

.xp-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 40px;
}

.xp-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  text-align: center;
}
.xp-card__number {
  font-size: 2rem;
  font-weight: 900;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.xp-card__label {
  font-size: 0.82rem;
  color: var(--text2);
  margin-top: 4px;
}

.values-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

@media (max-width: 900px) {
  .values-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 500px) {
  .values-grid {
    grid-template-columns: 1fr;
  }
}

.value-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
}
.value-card__icon {
  font-size: 2.2rem;
  margin-bottom: 16px;
  color: var(--primary2);
}
.value-card__icon svg { width: 32px; height: 32px; }
.value-card__title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 10px;
}
.value-card__text {
  font-size: 0.88rem;
  color: var(--text2);
  line-height: 1.65;
}

/* ---------- PAGE CONTACT ---------- */
.contact-hero {
  padding: 160px 0 80px;
  background: var(--bg);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.6fr;
  gap: 60px;
  align-items: start;
}

.contact-info__item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 32px;
}
.contact-info__icon {
  width: 48px; height: 48px;
  border-radius: 10px;
  background: rgba(108, 99, 255, 0.12);
  border: 1px solid rgba(108, 99, 255, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  color: white;
  flex-shrink: 0;
  flex-shrink: 0;
}
.contact-info__label {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text3);
  margin-bottom: 4px;
}
.contact-info__value {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--white);
}
.contact-info__value a {
  color: var(--white);
  transition: color var(--transition);
}
.contact-info__value a:hover { color: var(--primary2); }

/* Formulaire */
.form-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 7px;
  margin-bottom: 20px;
}
.form-group:last-of-type { margin-bottom: 0; }

.form-group label {
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--text2);
  letter-spacing: 0.02em;
}

.form-group input,
.form-group textarea {
  background: var(--bg2);
  border: 1.5px solid var(--border);
  border-radius: 8px;
  padding: 13px 16px;
  color: var(--text);
  font-size: 0.95rem;
  font-family: inherit;
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
  width: 100%;
}
.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--text3); }
.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(108, 99, 255, 0.15);
}

.form-group textarea {
  resize: vertical;
  min-height: 130px;
}

.form-submit {
  margin-top: 28px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 16px;
}

.form-note {
  font-size: 0.82rem;
  color: var(--text3);
  display: flex;
  align-items: center;
  gap: 6px;
}

/* Checkbox politique de confidentialité */
.checkbox-label {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  cursor: pointer;
  user-select: none;
}

.checkbox-label input[type="checkbox"] {
  position: absolute;
  opacity: 0;
  width: 0; height: 0;
}

.checkbox-custom {
  flex-shrink: 0;
  width: 20px; height: 20px;
  border-radius: 5px;
  border: 1.5px solid var(--border);
  background: var(--bg2);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 1px;
  transition: border-color var(--transition), background var(--transition);
}

.checkbox-label input:checked ~ .checkbox-custom {
  background: var(--primary);
  border-color: var(--primary);
}

.checkbox-label input:checked ~ .checkbox-custom::after {
  content: '';
  display: block;
  width: 5px; height: 9px;
  border: 2px solid white;
  border-top: none;
  border-left: none;
  transform: rotate(45deg) translateY(-1px);
}

.checkbox-label:hover .checkbox-custom {
  border-color: var(--primary);
}

.checkbox-text {
  font-size: 0.88rem;
  color: var(--text2);
  line-height: 1.5;
}

.checkbox-text a {
  color: var(--primary2);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.checkbox-text a:hover { color: var(--cyan); }

/* Bouton microphone */
.mic-btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 7px 14px;
  border-radius: 8px;
  border: 1.5px solid var(--border);
  background: transparent;
  color: var(--text2);
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  font-family: inherit;
}
.mic-btn:hover {
  border-color: var(--primary);
  color: var(--primary2);
  background: rgba(108, 99, 255, 0.07);
}
.mic-btn.recording {
  border-color: #ef4444;
  color: #ef4444;
  background: rgba(239, 68, 68, 0.08);
  animation: mic-pulse-border 1.5s infinite;
}
@keyframes mic-pulse-border {
  0%, 100% { box-shadow: 0 0 0 0 rgba(239,68,68,0.3); }
  50%       { box-shadow: 0 0 0 5px rgba(239,68,68,0); }
}

.mic-status {
  position: absolute;
  bottom: 10px;
  right: 12px;
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.78rem;
  color: #ef4444;
  font-weight: 600;
  pointer-events: none;
}
.mic-dot {
  width: 8px; height: 8px;
  background: #ef4444;
  border-radius: 50%;
  animation: mic-blink 1s infinite;
}
@keyframes mic-blink {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.2; }
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}

.form-error {
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.3);
  border-radius: 8px;
  padding: 14px 18px;
  color: #f87171;
  font-size: 0.92rem;
  font-weight: 500;
  margin-top: 16px;
}

.form-success {
  display: none;
  background: rgba(0, 212, 100, 0.1);
  border: 1px solid rgba(0, 212, 100, 0.3);
  border-radius: 8px;
  padding: 14px 18px;
  color: #00d464;
  font-size: 0.92rem;
  font-weight: 500;
  margin-top: 16px;
}

/* ---------- PAGE HERO interne ---------- */
.page-hero {
  padding: 140px 0 60px;
  background: var(--bg);
  position: relative;
  overflow: hidden;
}
.page-hero::before {
  content: '';
  position: absolute;
  width: 700px; height: 300px;
  background: radial-gradient(ellipse, rgba(108,99,255,0.12) 0%, transparent 70%);
  top: 50px; right: -200px;
  filter: blur(60px);
  pointer-events: none;
}

.page-hero .section-title { text-align: left; margin-bottom: 12px; }
.page-hero .section-sub { text-align: left; }

/* ---------- Animations scroll ---------- */
.fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}
.fade-up:nth-child(2) { transition-delay: 0.1s; }
.fade-up:nth-child(3) { transition-delay: 0.2s; }
.fade-up:nth-child(4) { transition-delay: 0.3s; }
.fade-up:nth-child(5) { transition-delay: 0.4s; }
.fade-up:nth-child(6) { transition-delay: 0.5s; }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .nav__list, .nav__cta { display: none; }
  .burger { display: flex; }

  .service-block {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .service-block--reverse { direction: ltr; }

  .about-hero__inner {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .about-avatar { width: 200px; height: 200px; font-size: 5rem; }

  .contact-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .form-row { grid-template-columns: 1fr; }
}

@media (max-width: 600px) {
  .section { padding: 64px 0; }
  .hero { padding: 100px 0 60px; }
  .hero__actions { flex-direction: column; }
  .btn-lg { width: 100%; justify-content: center; }
  .form-card { padding: 24px 20px; }
  .xp-grid { grid-template-columns: 1fr 1fr; }
}