/* ========================================
   sites.ytty.fr — Design system
   ======================================== */

:root {
  --bg: #FFFFFF;
  --bg-alt: #0A0A0A;
  --bg-soft: #F4F6F8;
  --fg: #0A0A0A;
  --fg-muted: #6B7280;
  --fg-inverse: #FFFFFF;
  --accent: #0066FF;
  --accent-light: #00C2FF;
  --accent-gradient: linear-gradient(135deg, #0066FF 0%, #00C2FF 100%);
  --border: #E5E7EB;
  --radius: 16px;
  --radius-sm: 12px;
  --shadow: 0 24px 60px rgba(10, 10, 10, 0.08);
  --shadow-lg: 0 40px 100px rgba(10, 10, 10, 0.12);
  --max-width: 1200px;
  --header-height: 80px;
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 24px);
}

body {
  font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--fg);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

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

/* Typography */
h1, h2, h3, h4 {
  font-family: "Space Grotesk", "Inter", sans-serif;
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(2.5rem, 7vw, 5rem);
}

h2 {
  font-size: clamp(2rem, 5vw, 3.5rem);
}

h3 {
  font-size: clamp(1.25rem, 2.5vw, 1.5rem);
}

p {
  color: var(--fg-muted);
}

/* Layout */
.wrap {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

section {
  padding: 96px 0;
}

.section-alt {
  background: var(--bg-alt);
  color: var(--fg-inverse);
}

.section-alt p {
  color: rgba(255, 255, 255, 0.72);
}

.section-soft {
  background: var(--bg-soft);
}

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  z-index: 1000;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid transparent;
  transition: var(--transition);
}

.header.scrolled {
  border-bottom-color: var(--border);
  box-shadow: 0 4px 20px rgba(10, 10, 10, 0.04);
}

.header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
}

.logo img {
  height: 32px;
  width: auto;
}

.nav-links {
  display: none;
  align-items: center;
  gap: 32px;
  font-size: 0.9375rem;
  font-weight: 500;
}

.nav-links a {
  color: var(--fg);
  position: relative;
  transition: var(--transition);
}

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

.nav-links a::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-gradient);
  transition: var(--transition);
}

.nav-links a:hover::after {
  width: 100%;
}

.menu-toggle {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  z-index: 1001;
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--fg);
  transition: var(--transition);
}

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

.menu-toggle.open span:nth-child(2) {
  opacity: 0;
}

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

@media (max-width: 767px) {
  .nav-links {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    height: calc(100vh - var(--header-height));
    z-index: 99999;
    background: #ffffff;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    align-items: center;
    padding: 40px 24px;
    gap: 24px;
    font-size: 1.25rem;
    transform: translateX(100%);
    transition: transform 0.35s ease;
  }

  .nav-links.open {
    transform: translateX(0);
  }
}

@media (min-width: 768px) {
  .menu-toggle {
    display: none;
  }
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: 100px;
  transition: var(--transition);
  white-space: nowrap;
}

.btn-primary {
  background: var(--accent-gradient);
  color: #fff;
  box-shadow: 0 8px 24px rgba(0, 102, 255, 0.28);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(0, 102, 255, 0.36);
}

.btn-outline {
  border: 1.5px solid var(--fg);
  color: var(--fg);
}

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

.section-alt .btn-outline {
  border-color: rgba(255, 255, 255, 0.6);
  color: #fff;
}

.section-alt .btn-outline:hover {
  background: #fff;
  color: var(--bg-alt);
}

.btn-white {
  background: #fff;
  color: var(--bg-alt);
}

.btn-white:hover {
  background: var(--bg-soft);
}

/* Hero */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--header-height);
  position: relative;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(circle at 80% 20%, rgba(0, 102, 255, 0.08) 0%, transparent 40%),
    radial-gradient(circle at 20% 80%, rgba(0, 194, 255, 0.06) 0%, transparent 40%);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: "Space Grotesk", sans-serif;
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 24px;
}

.eyebrow::before {
  content: "";
  width: 32px;
  height: 2px;
  background: var(--accent-gradient);
}

.hero-title {
  margin-bottom: 24px;
}

.hero-title em {
  font-style: normal;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-sub {
  font-size: clamp(1.0625rem, 2vw, 1.25rem);
  max-width: 560px;
  margin-bottom: 40px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.hero-visual {
  position: relative;
}

.hero-visual img {
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
}

.hero-badge {
  position: absolute;
  bottom: -20px;
  left: -20px;
  background: var(--bg-alt);
  color: #fff;
  padding: 18px 24px;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow);
}

.hero-badge strong {
  display: block;
  font-family: "Space Grotesk", sans-serif;
  font-size: 1.75rem;
  font-weight: 700;
  line-height: 1;
}

.hero-badge span {
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.72);
}

/* Marquee */
.marquee {
  padding: 20px 0;
  background: var(--bg-alt);
  color: rgba(255, 255, 255, 0.6);
  overflow: hidden;
  white-space: nowrap;
}

.marquee-inner {
  display: flex;
  animation: marquee 14s linear infinite;
}

.marquee-item {
  font-family: "Space Grotesk", sans-serif;
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding-right: 48px;
}

@keyframes marquee {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

@media (max-width: 767px) {
  .marquee-inner {
    animation-duration: 10s;
  }
}

/* Section header */
.section-header {
  max-width: 720px;
  margin-bottom: 64px;
}

.section-header h2 {
  margin-bottom: 20px;
}

.section-alt .section-header p {
  color: rgba(255, 255, 255, 0.72);
}

/* Features / Pillars */
.features-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

.feature-card {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px 32px;
  transition: var(--transition);
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
  border-color: transparent;
}

.feature-card img {
  width: 48px;
  height: 48px;
  margin-bottom: 24px;
}

@media (max-width: 767px) {
  .feature-card {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    text-align: left;
  }

  .feature-card img {
    margin-bottom: 0;
    flex-shrink: 0;
  }

  .feature-content {
    flex: 1;
  }
}

.feature-card h3 {
  margin-bottom: 12px;
}

/* Process */
.process-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  counter-reset: step;
}

.process-step {
  position: relative;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px 32px;
}

.process-step::before {
  counter-increment: step;
  content: counter(step, decimal-leading-zero);
  font-family: "Space Grotesk", sans-serif;
  font-size: 3rem;
  font-weight: 700;
  color: var(--accent);
  opacity: 0.18;
  position: absolute;
  top: 20px;
  right: 24px;
  line-height: 1;
}

.process-step h3 {
  margin-bottom: 8px;
}

.process-meta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: "Space Grotesk", sans-serif;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 12px;
}

/* Showcase */
.showcase-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
  align-items: center;
}

.showcase-visual {
  position: relative;
}

.showcase-visual img {
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
}

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

.showcase-gallery img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  aspect-ratio: 4 / 5;
}

@media (max-width: 767px) {
  .showcase-gallery {
    grid-template-columns: 1fr;
    max-width: 360px;
    margin: 0 auto;
  }
}

.showcase-logos {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 32px;
}

.client-chip {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 18px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 100px;
  font-size: 0.875rem;
  font-weight: 500;
  transition: var(--transition);
}

.client-chip:hover {
  background: rgba(255, 255, 255, 0.14);
}

.client-chip::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-gradient);
}

/* Pricing */
.pricing-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

.pricing-card {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px 32px;
  transition: var(--transition);
}

.pricing-card.featured {
  background: var(--bg-alt);
  color: #fff;
  border-color: var(--bg-alt);
  transform: scale(1.02);
}

.pricing-card.featured p {
  color: rgba(255, 255, 255, 0.72);
}

.pricing-badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 6px 12px;
  border-radius: 100px;
  background: var(--accent-gradient);
  color: #fff;
  margin-bottom: 20px;
}

.pricing-price {
  font-family: "Space Grotesk", sans-serif;
  font-size: 3rem;
  font-weight: 700;
  line-height: 1;
  margin-bottom: 8px;
}

.pricing-price span {
  font-size: 1rem;
  font-weight: 500;
  color: var(--fg-muted);
}

.pricing-card.featured .pricing-price span {
  color: rgba(255, 255, 255, 0.72);
}

.pricing-desc {
  margin-bottom: 28px;
}

.pricing-list {
  list-style: none;
  margin-bottom: 32px;
}

.pricing-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 8px 0;
  font-size: 0.9375rem;
  color: var(--fg);
}

.pricing-card.featured .pricing-list li {
  color: #fff;
}

.pricing-list li::before {
  content: "✓";
  color: var(--accent);
  font-weight: 700;
  flex-shrink: 0;
}

.pricing-card.featured .pricing-list li::before {
  color: var(--accent-light);
}

.pricing-list.cross li::before {
  content: "×";
  color: var(--fg-muted);
  opacity: 0.6;
}

.pricing-card.featured .pricing-list.cross li {
  color: rgba(255, 255, 255, 0.6);
}

/* FAQ */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  border-bottom: 1px solid var(--border);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 24px 0;
  font-family: "Space Grotesk", sans-serif;
  font-size: 1.125rem;
  font-weight: 600;
  text-align: left;
  color: var(--fg);
  transition: var(--transition);
}

.faq-question:hover {
  color: var(--accent);
}

.faq-icon {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  transition: var(--transition);
}

.faq-item.open .faq-icon {
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, opacity 0.25s ease;
  opacity: 0;
}

.faq-item.open .faq-answer {
  max-height: 300px;
  opacity: 1;
}

.faq-answer p {
  padding-bottom: 24px;
}

/* Contact */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
  align-items: start;
}

.form-card {
  background: #fff;
  border-radius: var(--radius);
  padding: 40px 32px;
  box-shadow: var(--shadow);
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--fg);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 14px 16px;
  font-size: 0.9375rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-soft);
  color: var(--fg);
  transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
  background: #fff;
  box-shadow: 0 0 0 4px rgba(0, 102, 255, 0.1);
}

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

.form-message {
  display: none;
  padding: 14px 16px;
  border-radius: var(--radius-sm);
  margin-bottom: 20px;
  font-size: 0.9375rem;
}

.form-message.success {
  display: block;
  background: #dcfce7;
  color: #166534;
}

.form-message.error {
  display: block;
  background: #fee2e2;
  color: #991b1b;
}

.contact-info h2 {
  margin-bottom: 20px;
}

.contact-info p {
  margin-bottom: 32px;
}

.contact-meta {
  display: grid;
  gap: 20px;
}

.contact-meta-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
}

.contact-meta-item strong {
  display: block;
  color: var(--fg);
  margin-bottom: 4px;
}

/* Footer */
.footer {
  padding: 64px 0 32px;
  background: var(--bg-alt);
  color: #fff;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  margin-bottom: 48px;
}

.footer-brand p {
  margin-top: 16px;
  max-width: 320px;
  color: rgba(255, 255, 255, 0.6);
}

.footer-links h4 {
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 20px;
  color: rgba(255, 255, 255, 0.6);
}

.footer-links ul {
  list-style: none;
  display: grid;
  gap: 12px;
}

.footer-links a {
  color: rgba(255, 255, 255, 0.8);
  transition: var(--transition);
}

.footer-links a:hover {
  color: #fff;
}

.footer-bottom {
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding-top: 32px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.5);
}

/* Reveal animation — content stays visible by default */
.reveal {
  opacity: 1;
  transform: translateY(0);
}

html:not(.no-js) .reveal.animate {
  animation: fadeInUp 0.7s cubic-bezier(0.2, 0, 0.2, 1) forwards;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (prefers-reduced-motion: reduce) {
  html:not(.no-js) .reveal.animate {
    animation: none;
  }
}

/* Utility */
.text-center {
  text-align: center;
}

.mx-auto {
  margin-left: auto;
  margin-right: auto;
}

.hidden-mobile {
  display: none;
}

@media (min-width: 768px) {
  .hidden-mobile {
    display: inline-flex;
  }
}

/* Responsive */
@media (min-width: 768px) {
  .nav-links {
    display: flex;
  }

  .hero-grid {
    grid-template-columns: 1.1fr 0.9fr;
  }

  .features-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .process-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .showcase-grid {
    grid-template-columns: 1.1fr 0.9fr;
  }

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

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

  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr 1fr;
  }

  .footer-bottom {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}

@media (min-width: 1024px) {
  .wrap {
    padding: 0 32px;
  }

  section {
    padding: 128px 0;
  }

  .pricing-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}