/* =============================================
   NexusIA — CSS pur, optimisé, zéro framework
   ============================================= */

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

:root {
  --c-bg:       #080C14;
  --c-bg2:      #0D1422;
  --c-surface:  #111927;
  --c-border:   rgba(255,255,255,.07);
  --c-accent:   #00E5C0;
  --c-accent2:  #6C63FF;
  --c-text:     #E8EDF5;
  --c-muted:    #8898AE;
  --c-white:    #ffffff;

  --font-head:  'Syne', sans-serif;
  --font-body:  'DM Sans', sans-serif;

  --radius:     12px;
  --radius-lg:  20px;
  --container:  1160px;
  --gap:        clamp(1.5rem, 4vw, 3rem);
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--c-bg);
  color: var(--c-text);
  line-height: 1.6;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
em { font-style: normal; color: var(--c-accent); }

/* ---- CONTAINER ---- */
.container {
  width: 92%;
  max-width: var(--container);
  margin: 0 auto;
}

/* ---- SECTION ---- */
.section {
  padding: clamp(4rem, 8vw, 7rem) 0;
}
.section-dark {
  background: var(--c-bg2);
}

/* ---- SECTION HEADER ---- */
.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto clamp(2.5rem, 5vw, 4rem);
}
.section-header h2 { font-family: var(--font-head); font-size: clamp(1.8rem, 3.5vw, 2.6rem); font-weight: 800; line-height: 1.2; margin: .5rem 0 .8rem; }
.section-header p { color: var(--c-muted); font-size: 1.05rem; }
.section-header.light h2, .section-header.light p { color: var(--c-white); }
.section-header.light p { color: rgba(255,255,255,.6); }

.section-tag {
  display: inline-block;
  font-size: .78rem;
  font-weight: 600;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--c-accent);
  padding: .25rem .75rem;
  border: 1px solid rgba(0,229,192,.25);
  border-radius: 999px;
}

/* ---- BUTTONS ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  padding: .75rem 1.6rem;
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-size: .95rem;
  font-weight: 500;
  cursor: pointer;
  border: none;
  transition: transform .18s ease, box-shadow .18s ease, background .18s ease;
  text-decoration: none;
}
.btn:hover { transform: translateY(-2px); }

.btn-primary {
  background: var(--c-accent);
  color: #000;
  font-weight: 600;
  box-shadow: 0 0 24px rgba(0,229,192,.25);
}
.btn-primary:hover { box-shadow: 0 0 32px rgba(0,229,192,.45); }

.btn-ghost {
  background: transparent;
  color: var(--c-text);
  border: 1px solid var(--c-border);
}
.btn-ghost:hover { border-color: var(--c-accent); color: var(--c-accent); }

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

.btn-sm { padding: .5rem 1rem; font-size: .88rem; }

/* ============================
   HEADER / NAV
   ============================ */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(8,12,20,.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--c-border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  height: 64px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: .5rem;
  font-family: var(--font-head);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--c-white);
}
.nav-logo strong { color: var(--c-accent); }
.logo-icon { color: var(--c-accent); font-size: 1.4rem; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  font-size: .92rem;
}
.nav-links a { color: var(--c-muted); transition: color .15s; }
.nav-links a:hover { color: var(--c-text); }
.nav-cta {
  background: var(--c-accent) !important;
  color: #000 !important;
  padding: .45rem 1rem;
  border-radius: var(--radius);
  font-weight: 600;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: .5rem;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--c-text);
  border-radius: 2px;
  transition: transform .2s;
}

/* ============================
   HERO
   ============================ */
.hero {
  position: relative;
  overflow: hidden;
  padding: clamp(5rem, 12vw, 10rem) 0 clamp(4rem, 8vw, 7rem);
}

.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.grid-overlay {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0,229,192,.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,229,192,.04) 1px, transparent 1px);
  background-size: 60px 60px;
}

.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: .35;
}
.orb-1 {
  width: 500px; height: 500px;
  background: radial-gradient(circle, var(--c-accent2), transparent 70%);
  top: -200px; right: -100px;
}
.orb-2 {
  width: 400px; height: 400px;
  background: radial-gradient(circle, var(--c-accent), transparent 70%);
  bottom: -150px; left: -100px;
  opacity: .2;
}

.hero-content {
  position: relative;
  max-width: 780px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .3rem .8rem;
  border: 1px solid var(--c-border);
  border-radius: 999px;
  font-size: .82rem;
  color: var(--c-muted);
  margin-bottom: 1.5rem;
}
.badge-dot {
  width: 7px; height: 7px;
  background: var(--c-accent);
  border-radius: 50%;
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%,100% { opacity: 1; transform: scale(1); }
  50% { opacity: .5; transform: scale(1.3); }
}

.hero-title {
  font-family: var(--font-head);
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -.02em;
  margin-bottom: 1.2rem;
}
.title-highlight {
  background: linear-gradient(135deg, var(--c-accent), var(--c-accent2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-desc {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--c-muted);
  max-width: 580px;
  margin-bottom: 2rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 2.5rem;
}

.hero-stats {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}
.stat {
  display: flex;
  flex-direction: column;
}
.stat strong { font-family: var(--font-head); font-size: 1.4rem; color: var(--c-white); }
.stat span { font-size: .8rem; color: var(--c-muted); }
.stat-sep {
  width: 1px;
  height: 30px;
  background: var(--c-border);
}

/* ============================
   ADS
   ============================ */
.ad-container {
  padding: 1rem 0;
}
.ad-placeholder {
  background: rgba(255,255,255,.03);
  border: 1px dashed rgba(255,255,255,.1);
  border-radius: var(--radius);
  padding: 1.5rem;
  text-align: center;
  font-size: .82rem;
  color: var(--c-muted);
  font-style: italic;
}

/* ============================
   TOOLS
   ============================ */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(290px, 1fr));
  gap: 1.25rem;
  margin-bottom: 2rem;
}

.tool-card {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  position: relative;
  transition: transform .2s, border-color .2s, box-shadow .2s;
  display: flex;
  flex-direction: column;
  gap: .75rem;
}
.tool-card:hover {
  transform: translateY(-4px);
  border-color: rgba(0,229,192,.3);
  box-shadow: 0 12px 40px rgba(0,0,0,.3);
}

.tool-featured {
  grid-column: span 2;
  border-color: rgba(0,229,192,.2);
  background: linear-gradient(135deg, rgba(0,229,192,.05), var(--c-surface));
}

.tool-badge {
  position: absolute;
  top: -12px;
  left: 1.2rem;
  background: linear-gradient(135deg, var(--c-accent), var(--c-accent2));
  color: #000;
  font-size: .72rem;
  font-weight: 700;
  padding: .2rem .7rem;
  border-radius: 999px;
}

.tool-icon { font-size: 2rem; }
.tool-card h3 { font-family: var(--font-head); font-size: 1.15rem; font-weight: 700; }
.tool-card p { font-size: .9rem; color: var(--c-muted); flex: 1; }

.tool-tags { display: flex; flex-wrap: wrap; gap: .4rem; }
.tool-tags span {
  font-size: .72rem;
  padding: .2rem .6rem;
  border-radius: 999px;
  background: rgba(255,255,255,.06);
  color: var(--c-muted);
}

.tool-link {
  color: var(--c-accent);
  font-size: .9rem;
  font-weight: 500;
  transition: gap .15s;
  display: inline-flex;
  align-items: center;
  gap: .3rem;
}
.tool-link:hover { text-decoration: underline; }

/* Affiliate Banner */
.affiliate-banner {
  background: linear-gradient(135deg, rgba(108,99,255,.1), rgba(0,229,192,.05));
  border: 1px solid rgba(108,99,255,.3);
  border-radius: var(--radius-lg);
  padding: 1.5rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  flex-wrap: wrap;
}
.affiliate-content { display: flex; align-items: center; gap: 1rem; flex: 1; }
.aff-icon { font-size: 2.5rem; }
.affiliate-content strong { display: block; font-family: var(--font-head); font-size: 1.1rem; margin-bottom: .3rem; }
.affiliate-content p { font-size: .9rem; color: var(--c-muted); }

/* ============================
   GUIDES
   ============================ */
.guides-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.25rem;
}

.guide-card {
  background: rgba(255,255,255,.04);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  display: flex;
  gap: 1rem;
  transition: transform .2s, border-color .2s;
}
.guide-card:hover {
  transform: translateY(-3px);
  border-color: rgba(0,229,192,.25);
}

.guide-num {
  font-family: var(--font-head);
  font-size: 2rem;
  font-weight: 800;
  color: rgba(0,229,192,.2);
  line-height: 1;
  min-width: 2.5rem;
}

.guide-cat {
  display: inline-block;
  font-size: .72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--c-accent2);
  margin-bottom: .4rem;
}

.guide-content h3 { font-family: var(--font-head); font-size: 1rem; font-weight: 700; margin-bottom: .4rem; }
.guide-content p { font-size: .88rem; color: var(--c-muted); margin-bottom: .75rem; }

.guide-link {
  color: var(--c-accent);
  font-size: .88rem;
  font-weight: 500;
}
.guide-link:hover { text-decoration: underline; }

/* ============================
   MONEY / MONETISATION
   ============================ */
.money-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(290px, 1fr));
  gap: 1.25rem;
}

.money-card {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  transition: transform .2s, border-color .2s;
}
.money-card:hover {
  transform: translateY(-4px);
  border-color: rgba(0,229,192,.3);
}
.money-card-cta {
  border-color: rgba(0,229,192,.25);
  background: linear-gradient(135deg, rgba(0,229,192,.05), var(--c-surface));
}

.money-icon { font-size: 2rem; margin-bottom: .75rem; }
.money-card h3 { font-family: var(--font-head); font-size: 1.1rem; font-weight: 700; margin-bottom: .5rem; }
.money-card p { font-size: .9rem; color: var(--c-muted); margin-bottom: 1rem; }

.money-potential {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: .6rem .9rem;
  background: rgba(255,255,255,.04);
  border-radius: var(--radius);
  gap: .5rem;
}
.potential-label { font-size: .75rem; color: var(--c-muted); }
.potential-value { font-size: .85rem; font-weight: 600; color: var(--c-accent); }

/* ============================
   NEWSLETTER
   ============================ */
.newsletter-section {
  background: var(--c-bg);
}

.newsletter-box {
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, rgba(108,99,255,.12), rgba(0,229,192,.06));
  border: 1px solid rgba(108,99,255,.3);
  border-radius: 24px;
  padding: clamp(2.5rem, 5vw, 4rem);
  max-width: 700px;
  margin: 0 auto;
  text-align: center;
}

.newsletter-deco { position: absolute; inset: 0; pointer-events: none; }
.nl-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
}
.nl-orb-1 {
  width: 300px; height: 300px;
  background: radial-gradient(circle, var(--c-accent2), transparent 60%);
  top: -100px; right: -100px;
  opacity: .2;
}
.nl-orb-2 {
  width: 200px; height: 200px;
  background: radial-gradient(circle, var(--c-accent), transparent 60%);
  bottom: -80px; left: -50px;
  opacity: .15;
}

.newsletter-body { position: relative; }
.newsletter-body h2 { font-family: var(--font-head); font-size: clamp(1.6rem, 3vw, 2.2rem); font-weight: 800; margin: .5rem 0 .8rem; }
.newsletter-body > p { color: var(--c-muted); margin-bottom: 2rem; }

.nl-form { max-width: 480px; margin: 0 auto; }
.nl-input-group {
  display: flex;
  gap: .5rem;
  flex-wrap: wrap;
}
.nl-input-group input {
  flex: 1;
  min-width: 200px;
  padding: .75rem 1rem;
  background: rgba(255,255,255,.06);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  color: var(--c-text);
  font-family: var(--font-body);
  font-size: .95rem;
  outline: none;
  transition: border-color .15s;
}
.nl-input-group input:focus { border-color: var(--c-accent); }
.nl-input-group input::placeholder { color: var(--c-muted); }

.nl-privacy {
  font-size: .78rem;
  color: var(--c-muted);
  margin-top: .75rem;
}

.nl-success {
  margin-top: 1rem;
  padding: .75rem;
  background: rgba(0,229,192,.1);
  border: 1px solid rgba(0,229,192,.3);
  border-radius: var(--radius);
  color: var(--c-accent);
  font-size: .9rem;
}

.nl-social {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  margin-top: 1.5rem;
  font-size: .85rem;
  color: var(--c-muted);
  flex-wrap: wrap;
}
.nl-social a {
  color: var(--c-text);
  padding: .3rem .7rem;
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  transition: border-color .15s, color .15s;
  font-size: .82rem;
}
.nl-social a:hover { border-color: var(--c-accent); color: var(--c-accent); }

/* ============================
   ABOUT
   ============================ */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: start;
}
.about-content { display: flex; flex-direction: column; gap: 1rem; }
.about-content h2 { font-family: var(--font-head); font-size: clamp(1.8rem, 3vw, 2.4rem); font-weight: 800; margin-top: .5rem; }
.about-content p { color: var(--c-muted); }

.about-values {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}
.value-item {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1rem 1.25rem;
  background: rgba(255,255,255,.03);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
}
.value-icon { font-size: 1.5rem; }
.value-item strong { display: block; font-weight: 600; margin-bottom: .25rem; }
.value-item p { font-size: .88rem; color: var(--c-muted); }

/* ============================
   FOOTER
   ============================ */
.footer {
  background: var(--c-bg2);
  border-top: 1px solid var(--c-border);
  padding: clamp(2.5rem, 5vw, 4rem) 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 2rem;
  padding-bottom: 3rem;
}

.footer-brand p {
  font-size: .88rem;
  color: var(--c-muted);
  margin-top: .75rem;
  max-width: 260px;
}

.footer-links h4,
.footer-newsletter h4 {
  font-family: var(--font-head);
  font-size: .9rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--c-text);
}
.footer-links ul li + li { margin-top: .5rem; }
.footer-links a { color: var(--c-muted); font-size: .88rem; transition: color .15s; }
.footer-links a:hover { color: var(--c-accent); }

.footer-newsletter p { font-size: .85rem; color: var(--c-muted); margin-bottom: .75rem; }
.footer-form { display: flex; gap: .4rem; }
.footer-form input {
  flex: 1;
  padding: .5rem .8rem;
  background: rgba(255,255,255,.06);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  color: var(--c-text);
  font-family: var(--font-body);
  font-size: .85rem;
  outline: none;
}
.footer-form input:focus { border-color: var(--c-accent); }
.footer-form input::placeholder { color: var(--c-muted); }

.footer-bottom {
  border-top: 1px solid var(--c-border);
  padding: 1.25rem 0;
}
.footer-bottom p { font-size: .8rem; color: var(--c-muted); text-align: center; }
.footer-bottom em { color: var(--c-text); }

/* ============================
   RESPONSIVE
   ============================ */
@media (max-width: 900px) {
  .tool-featured { grid-column: span 1; }
  .about-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 640px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0; right: 0;
    background: var(--c-bg2);
    border-bottom: 1px solid var(--c-border);
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: 1rem;
  }
  .nav-links.open { display: flex; }
  .nav-links li { width: 100%; }
  .nav-links a { display: block; padding: .75rem .5rem; border-bottom: 1px solid var(--c-border); }
  .nav-links li:last-child a { border-bottom: none; }
  .nav-cta { margin-top: .5rem; }
  .nav-toggle { display: flex; }

  .footer-grid { grid-template-columns: 1fr; }
  .affiliate-banner { flex-direction: column; }
  .hero-stats { gap: 1rem; }
}

/* ============================
   ANIMATIONS
   ============================ */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

.hero-content > * {
  animation: fadeUp .6s ease both;
}
.hero-badge   { animation-delay: .05s; }
.hero-title   { animation-delay: .15s; }
.hero-desc    { animation-delay: .25s; }
.hero-actions { animation-delay: .35s; }
.hero-stats   { animation-delay: .45s; }

/* Scroll reveal (JS ajoute .revealed) */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .55s ease, transform .55s ease;
}
.reveal.revealed {
  opacity: 1;
  transform: none;
}