/* ============================================================
   CLS — Cameroon Leader Services
   Palette: clashing warm neons on near-black
   Type: oversized display serif + small-set sans
   ============================================================ */

:root {
  --bg: #0a0a0a;
  --bg-soft: #121212;
  --panel: #161616;
  --ink: #ffffff;
  --ink-dim: #c9c9c9;
  --ink-mute: #9a9a9a;
  --accent-a: #ff2f92;
  --accent-b: #ff8a00;
  --accent-c: #f4ff33;
  --line: rgba(255, 255, 255, 0.14);
  --line-strong: rgba(255, 255, 255, 0.28);
  --pattern-ink: rgba(255, 255, 255, 0.055);
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.55);

  --serif: "Fraunces", "Times New Roman", serif;
  --sans: "Bricolage Grotesque", system-ui, -apple-system, sans-serif;

  --pad: clamp(1.25rem, 5vw, 4.5rem);
  --maxw: 1240px;
}

/* Light theme — same neon accents, but on paper so they stay readable */
html[data-theme="light"] {
  --bg: #f7f4ee;
  --bg-soft: #efeae1;
  --panel: #ffffff;
  --ink: #0d0d0d;
  --ink-dim: #2c2c2c;
  --ink-mute: #5c5c5c;
  --accent-a: #c4006a;
  --accent-b: #b85c00;
  --accent-c: #6d7a00;
  --line: rgba(0, 0, 0, 0.16);
  --line-strong: rgba(0, 0, 0, 0.34);
  --pattern-ink: rgba(0, 0, 0, 0.07);
  --shadow: 0 20px 50px rgba(0, 0, 0, 0.12);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
html, body { margin: 0; padding: 0; }

body {
  min-height: 100vh;
  background-color: var(--bg);
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24'><path d='M0 0H24M0 12H24M0 24H24' stroke='%23ffffff' stroke-opacity='0.055' stroke-width='1'/><path d='M0 0V24M12 0V24M24 0V24' stroke='%23ffffff' stroke-opacity='0.055' stroke-width='1'/></svg>");
  background-size: 24px 24px;
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

html[data-theme="light"] body {
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24'><path d='M0 0H24M0 12H24M0 24H24' stroke='%23000000' stroke-opacity='0.07' stroke-width='1'/><path d='M0 0V24M12 0V24M24 0V24' stroke='%23000000' stroke-opacity='0.07' stroke-width='1'/></svg>");
}

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

a { color: var(--accent-c); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--accent-b); }

:focus-visible {
  outline: 3px solid var(--accent-c);
  outline-offset: 3px;
  border-radius: 2px;
}

.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--accent-c);
  color: #0a0a0a;
  padding: 0.75rem 1rem;
  z-index: 100;
}
.skip:focus { left: 0.75rem; top: 0.75rem; }

.muted { color: var(--ink-mute); }

/* ============================ TOPBAR ============================ */

.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  padding: 0.85rem var(--pad);
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}

.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 0.6rem;
  text-decoration: none;
  color: var(--ink);
  margin-right: auto;
}
.brand-mark {
  font-family: var(--serif);
  font-weight: 800;
  font-size: 1.5rem;
  letter-spacing: -0.02em;
  color: var(--accent-a);
}
.brand-full {
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-mute);
}

.nav {
  display: flex;
  gap: 1.4rem;
  flex-wrap: wrap;
}
.nav a {
  color: var(--ink-dim);
  text-decoration: none;
  font-size: 0.82rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.55rem 0;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  border-bottom: 2px solid transparent;
}
.nav a:hover { color: var(--ink); border-bottom-color: var(--accent-a); }

.theme-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  min-height: 44px;
  min-width: 44px;
  padding: 0.4rem 0.85rem;
  background: transparent;
  color: var(--ink-dim);
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  font-family: var(--sans);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  cursor: pointer;
}
.theme-toggle:hover { color: var(--ink); border-color: var(--accent-c); }
.theme-icon { font-size: 1rem; line-height: 1; }

/* ============================ HERO ============================ */

.hero {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: clamp(2.5rem, 7vw, 6rem) var(--pad) clamp(3rem, 8vw, 7rem);
}

.kicker {
  margin: 0 0 0.5rem;
  font-size: 0.78rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--accent-b);
}

.display {
  font-family: var(--serif);
  font-weight: 900;
  font-size: clamp(4rem, 18vw, 22rem);
  line-height: 0.85;
  letter-spacing: -0.04em;
  margin: 0 0 0.35rem;
  color: var(--ink);
  text-wrap: balance;
}

.hero-sub {
  position: relative;
  z-index: 2;
  margin: 0 0 1.5rem;
  font-family: var(--serif);
  font-style: italic;
  font-weight: 400;
  font-size: clamp(1.15rem, 3vw, 2rem);
  line-height: 1.2;
  color: var(--accent-a);
  max-width: 22ch;
}

.hero-lede {
  max-width: 62ch;
  font-size: clamp(0.98rem, 1.4vw, 1.1rem);
  color: var(--ink-dim);
  margin: 0 0 2rem;
  text-wrap: pretty;
}
.hero-lede strong { color: var(--ink); }

.hero-actions {
  display: flex;
  gap: 0.85rem;
  flex-wrap: wrap;
  margin-bottom: 2.25rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0.85rem 1.6rem;
  font-family: var(--sans);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  border-radius: 2px;
  border: 2px solid transparent;
  cursor: pointer;
}
.btn-a {
  background: var(--accent-a);
  color: #ffffff;
  border-color: var(--accent-a);
}
.btn-a:hover { background: var(--accent-b); border-color: var(--accent-b); color: #0a0a0a; }
.btn-ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--line-strong);
}
.btn-ghost:hover { border-color: var(--accent-c); color: var(--accent-c); }

.hero-tags {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0;
  padding: 0;
}
.hero-tags li {
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  padding: 0.4rem 0.8rem;
  border: 1px solid var(--line-strong);
  color: var(--ink-dim);
}

/* ==================== DIAGONAL SPLIT ==================== */

.split {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  max-width: var(--maxw);
  margin: 0 auto clamp(3rem, 8vw, 6rem);
  padding: 0 var(--pad);
  gap: 1.5rem;
}

.split-panel {
  position: relative;
  padding: clamp(1.5rem, 4vw, 3rem);
  background: var(--panel);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.split-panel::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(135deg, color-mix(in srgb, var(--accent-a) 16%, transparent), transparent 55%);
}
.split-b::before {
  background: linear-gradient(135deg, color-mix(in srgb, var(--accent-b) 16%, transparent), transparent 55%);
}

.split-inner { position: relative; z-index: 1; }

.split-head {
  font-family: var(--serif);
  font-weight: 700;
  font-size: clamp(1.4rem, 3vw, 2.1rem);
  line-height: 1.05;
  margin: 0 0 1rem;
  color: var(--ink);
}

.split-panel p {
  font-size: 0.95rem;
  color: var(--ink-dim);
  margin: 0 0 0.9rem;
  text-wrap: pretty;
}
.split-panel p:last-child { margin-bottom: 0; }

/* ============================ SECTIONS ============================ */

section { scroll-margin-top: 90px; }

.section-title {
  font-family: var(--serif);
  font-weight: 800;
  font-size: clamp(2rem, 6vw, 4.2rem);
  line-height: 0.95;
  letter-spacing: -0.03em;
  margin: 0 0 1rem;
  color: var(--ink);
  text-wrap: balance;
}

.section-lede {
  max-width: 68ch;
  font-size: clamp(0.95rem, 1.4vw, 1.08rem);
  color: var(--ink-dim);
  margin: 0 0 2.5rem;
  text-wrap: pretty;
}

.expertises,
.methode,
.apropos,
.contact {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: clamp(2.5rem, 7vw, 5.5rem) var(--pad);
  border-top: 1px solid var(--line);
}

/* ============================ CARDS ============================ */

.cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.card {
  position: relative;
  background: var(--bg-soft);
  padding: clamp(1.4rem, 3vw, 2.2rem);
  transition: background 180ms ease;
}
.card:hover { background: var(--panel); }

.card-num {
  display: block;
  font-family: var(--serif);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--accent-b);
  margin-bottom: 0.6rem;
}

.card h3 {
  font-family: var(--serif);
  font-weight: 700;
  font-size: clamp(1.25rem, 2.4vw, 1.65rem);
  line-height: 1.1;
  margin: 0 0 0.4rem;
  color: var(--ink);
}

.card-tag {
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-a);
  margin: 0 0 0.9rem;
}

.card p {
  font-size: 0.92rem;
  color: var(--ink-dim);
  margin: 0 0 1rem;
  text-wrap: pretty;
}

.card-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
  padding-top: 0.85rem;
}
.card-list li {
  font-size: 0.82rem;
  color: var(--ink-mute);
  padding-left: 1rem;
  position: relative;
  margin-bottom: 0.3rem;
}
.card-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 6px;
  height: 6px;
  background: var(--accent-c);
}

/* ============================ MÉTHODE ============================ */

.steps {
  list-style: none;
  counter-reset: step;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

.steps li {
  counter-increment: step;
  position: relative;
  padding-left: 3.2rem;
  border-left: 2px solid var(--line-strong);
  padding-bottom: 0.5rem;
}
.steps li::before {
  content: "0" counter(step);
  position: absolute;
  left: -0.05rem;
  top: -0.35rem;
  transform: translateX(-50%);
  background: var(--bg);
  padding: 0.15rem 0.35rem;
  font-family: var(--serif);
  font-weight: 800;
  font-size: 1.1rem;
  color: var(--accent-b);
}

.steps h3 {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 1.25rem;
  margin: 0 0 0.5rem;
  color: var(--ink);
}
.steps p {
  font-size: 0.93rem;
  color: var(--ink-dim);
  margin: 0;
  max-width: 60ch;
  text-wrap: pretty;
}

/* ============================ À PROPOS ============================ */

.apropos-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.5rem, 4vw, 3rem);
}
.apropos-grid p {
  font-size: 0.97rem;
  color: var(--ink-dim);
  margin: 0 0 1rem;
  max-width: 66ch;
  text-wrap: pretty;
}
.apropos-grid strong { color: var(--ink); }

.apropos-side {
  background: var(--panel);
  border: 1px solid var(--line);
  border-left: 4px solid var(--accent-a);
  padding: clamp(1.25rem, 3vw, 2rem);
}
.apropos-side h3 {
  font-family: var(--serif);
  font-size: 1.2rem;
  margin: 0 0 1rem;
  color: var(--ink);
}
.engagements {
  list-style: none;
  margin: 0 0 1rem;
  padding: 0;
}
.engagements li {
  font-size: 0.88rem;
  color: var(--ink-dim);
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--line);
}
.engagements li:last-child { border-bottom: 0; }
.engagements strong { color: var(--accent-c); }

.side-note {
  font-size: 0.8rem;
  color: var(--ink-mute);
  margin: 0;
}

/* ============================ CONTACT ============================ */

.contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.5rem, 4vw, 3rem);
}

.contact-direct h3,
.contact-form h3 {
  font-family: var(--serif);
  font-size: 1.25rem;
  margin: 0 0 1.25rem;
  color: var(--ink);
}

.contact-list { margin: 0; }
.contact-list > div {
  padding: 0.9rem 0;
  border-bottom: 1px solid var(--line);
}
.contact-list dt {
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent-b);
  margin-bottom: 0.35rem;
}
.contact-list dd {
  margin: 0;
  font-size: 0.98rem;
  color: var(--ink);
  line-height: 1.6;
}
.contact-list a { color: var(--ink); }
.contact-list a:hover { color: var(--accent-c); }

.contact-form {
  display: flex;
  flex-direction: column;
  background: var(--panel);
  border: 1px solid var(--line);
  padding: clamp(1.25rem, 3vw, 2rem);
}

.contact-form label {
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin-bottom: 0.4rem;
}

.contact-form input,
.contact-form select,
.contact-form textarea {
  font-family: var(--sans);
  font-size: 1rem;
  color: var(--ink);
  background: var(--bg);
  border: 1px solid var(--line-strong);
  border-radius: 2px;
  padding: 0.75rem 0.85rem;
  margin-bottom: 1.1rem;
  min-height: 44px;
  width: 100%;
}
.contact-form textarea { resize: vertical; }
.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
  border-color: var(--accent-c);
  outline: 2px solid var(--accent-c);
  outline-offset: 1px;
}
.contact-form ::placeholder { color: var(--ink-mute); opacity: 1; }

.contact-form .btn { align-self: flex-start; margin-top: 0.25rem; }

.form-status {
  margin: 1rem 0 0;
  font-size: 0.9rem;
  color: var(--accent-c);
}
.form-status.is-error { color: var(--accent-a); }

/* ============================ FOOTER ============================ */

.site-footer {
  border-top: 1px solid var(--line);
  background: var(--bg-soft);
  padding: clamp(2rem, 5vw, 3.5rem) var(--pad) 4rem;
}
.footer-inner {
  max-width: var(--maxw);
  margin: 0 auto;
}
.footer-brand {
  font-family: var(--serif);
  font-weight: 800;
  font-size: clamp(1.3rem, 3vw, 1.9rem);
  margin: 0 0 0.5rem;
  color: var(--ink);
}
.footer-line {
  font-size: 0.85rem;
  color: var(--ink-mute);
  margin: 0 0 0.4rem;
}
.footer-line a { color: var(--ink-dim); }

.attribution {
  margin: 1.5rem 0 0;
  font-size: 0.72rem;
  color: var(--ink-mute);
}
.attribution a { color: var(--ink-mute); text-decoration: underline; }
.attribution a:hover { color: var(--ink); }

/* ==================== PAGE-LOAD ORCHESTRATION ==================== */

@keyframes riseIn {
  from { opacity: 0; transform: translateY(18px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes slideDown {
  from { opacity: 0; transform: translateY(-14px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes typeIn {
  from { opacity: 0; clip-path: inset(0 100% 0 0); }
  to   { opacity: 1; clip-path: inset(0 0 0 0); }
}

.reveal {
  animation: riseIn 700ms cubic-bezier(0.22, 1, 0.36, 1) both;
}
.r1 { animation-delay: 0ms; }
.r2 { animation: typeIn 900ms cubic-bezier(0.22, 1, 0.36, 1) 120ms both; }
.r3 { animation-delay: 240ms; }
.r4 { animation-delay: 360ms; }
.r5 { animation-delay: 480ms; }
.r6 { animation-delay: 600ms; }

.topbar { animation: slideDown 600ms cubic-bezier(0.22, 1, 0.36, 1) both; }

/* ==================== RESPONSIVE ==================== */

@media (min-width: 700px) {
  .cards { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr 1.15fr; }
  .apropos-grid { grid-template-columns: 1.4fr 1fr; }
}

@media (min-width: 1000px) {
  .cards { grid-template-columns: repeat(4, 1fr); }

  /* Diagonal split: two panels clipped along a diagonal, offset vertically */
  .split {
    grid-template-columns: 1fr 1fr;
    gap: 0;
    align-items: start;
  }
  .split-panel {
    clip-path: polygon(0 0, 100% 6%, 100% 100%, 0 94%);
    padding: clamp(3rem, 5vw, 5rem) clamp(2rem, 4vw, 3.5rem);
  }
  .split-a { margin-top: 0; }
  .split-b { margin-top: 4rem; }

  /* Opposing scroll: each panel drifts in the opposite direction */
  @supports (animation-timeline: view()) {
    .split-a .split-inner {
      animation: driftUp linear both;
      animation-timeline: view();
      animation-range: entry 0% exit 100%;
    }
    .split-b .split-inner {
      animation: driftDown linear both;
      animation-timeline: view();
      animation-range: entry 0% exit 100%;
    }
  }
}

@keyframes driftUp {
  from { transform: translateY(38px); }
  to   { transform: translateY(-38px); }
}
@keyframes driftDown {
  from { transform: translateY(-38px); }
  to   { transform: translateY(38px); }
}

@media (min-width: 1100px) {
  .hero-lede { font-size: 1.12rem; }
}

/* ==================== REDUCED MOTION ==================== */

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-delay: 0ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .reveal, .topbar { opacity: 1 !important; transform: none !important; clip-path: none !important; }
  .split-a .split-inner, .split-b .split-inner { animation: none !important; transform: none !important; }
}