/* ===== Sudelli : thème sombre & tech élégant ===== */
:root {
  --bg: #0b0f17;
  --bg-2: #0e1420;
  --surface: #131a26;
  --surface-2: #18212f;
  --border: #233044;
  --text: #e7edf5;
  --muted: #95a3b8;
  --accent: #38bdf8;
  --accent-2: #4361ee;
  --accent-glow: rgba(56, 189, 248, 0.35);
  --radius: 14px;
  --maxw: 1140px;
  --shadow: 0 18px 40px -18px rgba(0, 0, 0, 0.7);
  --font: 'Inter', system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  --mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1, h2, h3, h4 { line-height: 1.15; margin: 0 0 .6em; font-weight: 700; letter-spacing: -0.02em; }
h1 { font-size: clamp(2.2rem, 5vw, 3.6rem); }
h2 { font-size: clamp(1.7rem, 3.5vw, 2.5rem); }
h3 { font-size: 1.25rem; }
p { margin: 0 0 1rem; color: var(--muted); }
a { color: var(--accent); text-decoration: none; transition: color .2s ease; }
a:hover { color: var(--accent-2); }

.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 1.5rem; }

.skip-link {
  position: absolute; left: -999px; top: 0; z-index: 999;
  background: var(--accent); color: #04121d; padding: .6rem 1rem; border-radius: 0 0 8px 0;
}
.skip-link:focus { left: 0; }

/* ===== Header ===== */
.site-header {
  position: sticky; top: 0; z-index: 100;
  backdrop-filter: blur(12px);
  background: rgba(11, 15, 23, 0.7);
  border-bottom: 1px solid transparent;
  transition: border-color .3s ease, background .3s ease;
}
.site-header.scrolled { border-bottom-color: var(--border); background: rgba(11, 15, 23, 0.92); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 70px; }

.brand { display: inline-flex; align-items: center; gap: .6rem; color: var(--text); font-weight: 800; font-size: 1.3rem; letter-spacing: -0.03em; }
.brand:hover { color: var(--text); }
.brand-logo { height: 34px; width: auto; display: block; filter: drop-shadow(0 0 16px var(--accent-glow)); }
.brand-mark {
  font-family: var(--mono); color: var(--accent);
  background: var(--surface); border: 1px solid var(--border);
  padding: .15rem .4rem; border-radius: 8px; font-size: .85em;
  box-shadow: 0 0 18px -4px var(--accent-glow);
}
.footer-logo { height: 64px; width: auto; max-width: 240px; display: block; }

.site-nav { display: flex; align-items: center; gap: 1.8rem; }
.site-nav a { color: var(--muted); font-weight: 500; font-size: .98rem; position: relative; }
.site-nav a:hover { color: var(--text); }
.site-nav a.active { color: var(--text); }
.site-nav a:not(.nav-cta)::after {
  content: ''; position: absolute; left: 0; bottom: -6px; height: 2px; width: 0;
  background: linear-gradient(90deg, var(--accent), var(--accent-2)); transition: width .25s ease;
}
.site-nav a:not(.nav-cta):hover::after, .site-nav a.active::after { width: 100%; }
.nav-cta {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #04121d !important; padding: .5rem 1.1rem; border-radius: 10px; font-weight: 600;
  box-shadow: 0 8px 24px -10px var(--accent-glow);
}
.nav-cta:hover { transform: translateY(-1px); }

.nav-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: 0; cursor: pointer; padding: 8px; }
.nav-toggle span { width: 24px; height: 2px; background: var(--text); transition: .3s ease; border-radius: 2px; }
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ===== Sections ===== */
section { padding: 5.5rem 0; position: relative; }

/* Alternance de fonds : section légèrement surélevée (plus claire que le fond) */
.section-raised { background: linear-gradient(180deg, #0f1825, #0c1019); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }

/* Section claire (témoignages) pour rompre le tout-sombre */
.section-light { background: linear-gradient(180deg, #eef2f8, #e3eaf3); color: #1b2430; }
.section-light h2, .section-light h3, .section-light h4 { color: #0e1722; }
.section-light p, .section-light .lead { color: #475569; }
.section-light .section-tag { color: #1d4ed8; }
.section-light .card { background: #ffffff; border-color: #d9e2ee; box-shadow: 0 14px 30px -20px rgba(15,23,42,.35); }
.section-light .card h3 { color: #0e1722; }
.section-light .card p { color: #475569; }
.section-light .card:hover { border-color: #b6c6da; }
.section-tag {
  display: inline-block; font-family: var(--mono); font-size: .8rem; letter-spacing: .15em;
  text-transform: uppercase; color: var(--accent); margin-bottom: 1rem;
}
.section-head { max-width: 640px; margin-bottom: 3rem; }
.section-head h1 { font-size: clamp(1.9rem, 4vw, 2.7rem); }
.lead { font-size: 1.15rem; color: var(--muted); }
.text-center { text-align: center; }
.center-head { margin-left: auto; margin-right: auto; }

/* ===== Hero ===== */
.hero { position: relative; padding: 7rem 0 6rem; overflow: hidden; }
.hero-bg {
  position: absolute; inset: 0; z-index: -1;
  background:
    radial-gradient(55% 55% at 78% 8%, rgba(56,189,248,0.22), transparent 60%),
    radial-gradient(45% 50% at 12% 75%, rgba(67,97,238,0.16), transparent 60%),
    radial-gradient(40% 40% at 50% 110%, rgba(29,64,175,0.12), transparent 60%);
}
.hero-bg::after {
  content: ''; position: absolute; width: 480px; height: 480px; right: -120px; top: -120px;
  background: radial-gradient(circle, var(--accent-glow), transparent 70%);
  filter: blur(40px); opacity: .5; border-radius: 50%;
  animation: float 14s ease-in-out infinite;
}
@keyframes float { 0%,100% { transform: translate(0,0); } 50% { transform: translate(-30px, 30px); } }
.hero-grid-lines {
  position: absolute; inset: 0; z-index: -1; opacity: .9;
  background-image:
    linear-gradient(rgba(56,189,248,0.10) 1px, transparent 1px),
    linear-gradient(90deg, rgba(56,189,248,0.10) 1px, transparent 1px);
  background-size: 46px 46px;
  mask-image: radial-gradient(circle at 70% 25%, black, transparent 75%);
  -webkit-mask-image: radial-gradient(circle at 70% 25%, black, transparent 75%);
}

/* ===== Hero tech badges ===== */
.hero-badges { display: flex; flex-wrap: wrap; align-items: center; gap: .5rem; margin-top: 2.5rem; }
.hero-badges .badge {
  font-family: var(--mono); font-size: .8rem; color: var(--text);
  background: rgba(56,189,248,0.06); border: 1px solid var(--border);
  padding: .35rem .75rem; border-radius: 999px; transition: border-color .2s ease, color .2s ease, background .2s ease;
}
.hero-badges .badge:hover { border-color: var(--accent); color: var(--accent); background: rgba(56,189,248,0.12); }
.hero-badges .sep { color: var(--muted); font-size: .75rem; }
.hero h1 { max-width: 20ch; }
.hero h1 .grad { background: linear-gradient(120deg, var(--accent), var(--accent-2)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero-sub { max-width: 56ch; font-size: 1.2rem; }
.code-line { font-family: var(--mono); color: var(--accent); font-size: .9rem; margin-bottom: 1.5rem; }
.code-line .cursor { display: inline-block; width: 9px; background: var(--accent); margin-left: 2px; animation: blink 1.1s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0; } }

.btn {
  display: inline-flex; align-items: center; gap: .5rem; cursor: pointer;
  font-weight: 600; font-size: 1rem; padding: .8rem 1.5rem; border-radius: 12px;
  border: 1px solid transparent; transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}
.btn-primary { background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #04121d; box-shadow: 0 12px 30px -12px var(--accent-glow); }
.btn-primary:hover { transform: translateY(-2px); color: #04121d; box-shadow: 0 18px 40px -14px var(--accent-glow); }
.btn-ghost { background: var(--surface); border-color: var(--border); color: var(--text); }
.btn-ghost:hover { border-color: var(--accent); color: var(--text); transform: translateY(-2px); }
.hero-actions { display: flex; gap: 1rem; flex-wrap: wrap; margin-top: 2rem; }

.hero-stats { display: flex; gap: 2.5rem; margin-top: 3.5rem; flex-wrap: wrap; }
.stat .num { font-size: 2rem; font-weight: 800; color: var(--text); }
.stat .num .accent { color: var(--accent); }
.stat .label { color: var(--muted); font-size: .9rem; }

/* ===== Cards / grids ===== */
.grid { display: grid; gap: 1.5rem; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }

.card {
  background: linear-gradient(180deg, var(--surface), var(--bg-2));
  border: 1px solid var(--border); border-radius: var(--radius); padding: 1.8rem;
  transition: transform .25s ease, border-color .25s ease, box-shadow .25s ease;
  position: relative; overflow: hidden;
}
.card::before {
  content: ''; position: absolute; inset: 0 0 auto 0; height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2)); transform: scaleX(0); transform-origin: left; transition: transform .3s ease;
}
.card:hover { transform: translateY(-6px); border-color: #26407a; box-shadow: var(--shadow); }
.card:hover::before { transform: scaleX(1); }
.card .icon {
  width: 46px; height: 46px; display: grid; place-items: center; border-radius: 12px;
  background: var(--surface-2); border: 1px solid var(--border); color: var(--accent);
  font-family: var(--mono); font-size: 1.1rem; margin-bottom: 1.1rem;
}
.card h3 { color: var(--text); }
.card p { margin-bottom: 0; font-size: .96rem; }
.card ul { margin: .8rem 0 0; padding-left: 1.1rem; color: var(--muted); font-size: .92rem; }
.card ul li { margin-bottom: .35rem; }

/* ===== Tech tags ===== */
.tags { display: flex; flex-wrap: wrap; gap: .6rem; margin-top: 1.2rem; }
.tag {
  font-family: var(--mono); font-size: .82rem; color: var(--muted);
  background: var(--surface); border: 1px solid var(--border); padding: .35rem .7rem; border-radius: 8px;
  transition: color .2s ease, border-color .2s ease;
}
.tag:hover { color: var(--accent); border-color: var(--accent); }

/* ===== Project cards ===== */
.project { display: flex; flex-direction: column; padding: 2.2rem 1.9rem; }
.project .sector { font-family: var(--mono); font-size: .78rem; color: var(--accent); text-transform: uppercase; letter-spacing: .1em; }
.project h3 { margin-top: .5rem; margin-bottom: .7rem; }
.project p { line-height: 1.6; }

/* ===== Hero pill (positionnement freelance) ===== */
.hero-pill {
  display: inline-flex; align-items: center; gap: .55rem; margin-bottom: 1.3rem;
  font-size: .85rem; font-weight: 500; color: var(--text);
  background: rgba(56,189,248,0.08); border: 1px solid var(--border);
  padding: .4rem .9rem; border-radius: 999px;
}
.hero-pill .dot { width: 8px; height: 8px; border-radius: 50%; background: #34d399; box-shadow: 0 0 10px #34d399; }

/* ===== Carte mise en avant (spécialisation) ===== */
.feature-card {
  display: grid; grid-template-columns: auto 1fr; gap: 1.6rem; align-items: start;
  background: linear-gradient(135deg, rgba(56,189,248,0.10), var(--surface));
  border: 1px solid #26407a; border-radius: 20px; padding: 2.4rem;
}
.feature-card .big-icon {
  width: 60px; height: 60px; display: grid; place-items: center; border-radius: 16px;
  background: var(--surface-2); border: 1px solid var(--border); color: var(--accent); font-size: 1.6rem;
}
.feature-card h3 { color: var(--text); font-size: 1.4rem; }

/* ===== Témoignages ===== */
.testimonial { display: flex; flex-direction: column; gap: 1rem; }
.testimonial .quote { font-size: 1.05rem; line-height: 1.6; }
.testimonial .quote::before { content: '“'; font-size: 2.4rem; line-height: 0; color: #1d4ed8; margin-right: .2rem; vertical-align: -0.35em; }
.testimonial .author { display: flex; align-items: center; gap: .8rem; margin-top: auto; }
.testimonial .avatar { width: 42px; height: 42px; border-radius: 50%; background: linear-gradient(135deg, #38bdf8, #4361ee); color: #fff; display: grid; place-items: center; font-weight: 700; }
.testimonial .who strong { display: block; color: #0e1722; }
.testimonial .who span { font-size: .85rem; color: #64748b; }

/* ===== Études de cas ===== */
.case-study { padding: 2.6rem; margin-bottom: 2rem; }
.case-head { display: flex; flex-wrap: wrap; align-items: baseline; gap: .8rem 1.2rem; margin-bottom: 1.6rem; }
.case-head .sector { font-family: var(--mono); font-size: .78rem; color: var(--accent); text-transform: uppercase; letter-spacing: .1em; }
.case-head h3 { margin: 0; font-size: 1.5rem; }
.case-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; }
.case-block .label {
  display: flex; align-items: center; gap: .5rem; font-family: var(--mono); font-size: .72rem;
  text-transform: uppercase; letter-spacing: .12em; color: var(--muted); margin-bottom: .5rem;
}
.case-block .label .n { color: var(--accent); }
.case-block p { font-size: .95rem; margin: 0; }
.case-block.result p { color: var(--text); }
.case-block.result .label { color: var(--accent); }

/* ===== About ===== */
.about-grid { display: grid; grid-template-columns: 1.2fr 1fr; gap: 3rem; align-items: start; }
.timeline { border-left: 2px solid var(--border); padding-left: 1.5rem; margin-top: 1rem; }
.timeline-item { position: relative; margin-bottom: 1.6rem; }
.timeline-item::before { content: ''; position: absolute; left: -1.95rem; top: .4rem; width: 12px; height: 12px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 12px var(--accent-glow); }
.timeline-item .year { font-family: var(--mono); font-size: .85rem; color: var(--accent); }
.timeline-item h4 { margin: .2rem 0; color: var(--text); }
.timeline-item p { margin: 0; font-size: .92rem; }
.values li { color: var(--muted); margin-bottom: .8rem; padding-left: 1.6rem; position: relative; }
.values li::before { content: '▸'; position: absolute; left: 0; color: var(--accent); }

/* ===== CTA band ===== */
.cta-band {
  background: linear-gradient(135deg, var(--surface), var(--bg-2));
  border: 1px solid var(--border); border-radius: 20px; padding: 3rem; text-align: center;
  position: relative; overflow: hidden;
}
.cta-band::after { content: ''; position: absolute; inset: 0; background: radial-gradient(60% 120% at 50% 0%, var(--accent-glow), transparent 60%); opacity: .25; pointer-events: none; }
.cta-band h2, .cta-band p, .cta-band .btn { position: relative; z-index: 1; }

/* ===== Forms ===== */
.form-wrap { max-width: 640px; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1.2rem; }
.field { display: flex; flex-direction: column; gap: .4rem; margin-bottom: 1.2rem; }
.field.full { grid-column: 1 / -1; }
.field label { font-size: .9rem; color: var(--text); font-weight: 500; }
.field input, .field textarea {
  background: var(--surface); border: 1px solid var(--border); border-radius: 10px;
  color: var(--text); padding: .8rem 1rem; font-family: var(--font); font-size: 1rem; transition: border-color .2s ease, box-shadow .2s ease;
}
.field input:focus, .field textarea:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-glow); }
.field textarea { resize: vertical; min-height: 140px; }
.honeypot { position: absolute; left: -9999px; opacity: 0; }
.field-validation-error, .text-danger { color: #fca5a5; font-size: .85rem; }
.validation-summary-errors { color: #fca5a5; background: rgba(252,165,165,.08); border: 1px solid rgba(252,165,165,.3); border-radius: 10px; padding: .8rem 1rem; margin-bottom: 1rem; }
.validation-summary-errors ul { margin: 0; padding-left: 1.2rem; }

.contact-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 3rem; align-items: start; }
.contact-info .info-item { margin-bottom: 1.5rem; }
.contact-info .info-item .k { font-family: var(--mono); font-size: .8rem; color: var(--accent); text-transform: uppercase; letter-spacing: .1em; }
.contact-info .info-item .v { color: var(--text); }

.alert-success {
  background: rgba(56,189,248,.08); border: 1px solid var(--border); border-radius: 14px; padding: 2.5rem; text-align: center;
}
.alert-success .check { font-size: 2.5rem; color: var(--accent); }

/* ===== Reveal animations ===== */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s cubic-bezier(.16,1,.3,1), transform .7s cubic-bezier(.16,1,.3,1); }
.reveal.visible { opacity: 1; transform: none; }
.reveal-delay-1 { transition-delay: .08s; }
.reveal-delay-2 { transition-delay: .16s; }
.reveal-delay-3 { transition-delay: .24s; }

/* ===== Footer ===== */
.site-footer { border-top: 1px solid var(--border); background: var(--bg-2); padding: 3.5rem 0 1.5rem; margin-top: 3rem; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.2fr; gap: 2rem; }
.footer-col h4 { color: var(--text); font-size: .95rem; margin-bottom: 1rem; }
.footer-col a, .footer-col span { display: block; color: var(--muted); font-size: .92rem; margin-bottom: .5rem; }
.footer-col a:hover { color: var(--accent); }
.footer-brand { margin-bottom: 1rem; }
.footer-baseline { font-size: .92rem; }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; border-top: 1px solid var(--border); margin-top: 2.5rem; padding-top: 1.5rem; }
.footer-bottom span { color: var(--muted); font-size: .85rem; }

/* ===== Responsive ===== */
@media (max-width: 900px) {
  .grid-3 { grid-template-columns: 1fr 1fr; }
  .about-grid, .contact-layout { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .case-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 720px) {
  .nav-toggle { display: flex; }
  .site-nav {
    position: fixed; inset: 70px 0 auto 0; flex-direction: column; align-items: flex-start; gap: 0;
    background: var(--bg-2); border-bottom: 1px solid var(--border); padding: 0 1.5rem 1rem;
    transform: translateY(-120%);
    visibility: hidden;
    transition: transform .3s ease, visibility 0s linear .3s;
  }
  .site-nav.open {
    transform: translateY(0);
    visibility: visible;
    box-shadow: var(--shadow);
    transition: transform .3s ease, visibility 0s linear 0s;
  }
  .site-nav a { padding: .9rem 0; width: 100%; border-bottom: 1px solid var(--border); }
  .site-nav a:first-child { padding-top: 0; }
  .site-nav a.nav-cta {
    margin-top: 1.25rem;
    padding: .9rem 1.1rem;
    border-bottom: 0;
    text-align: center;
  }
  .grid-3, .grid-2, .form-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  section { padding: 4rem 0; }
  .feature-card { grid-template-columns: 1fr; padding: 1.8rem; }
  .case-grid { grid-template-columns: 1fr; }
  .case-study { padding: 1.8rem; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
  .reveal { opacity: 1; transform: none; }
}