/* ── Variables ─────────────────────────────────────────── */
:root {
  --bg: #0c0a1a;
  --surface: rgba(255, 255, 255, 0.04);
  --glass: rgba(255, 255, 255, 0.06);
  --glass-border: rgba(255, 255, 255, 0.1);
  --ink: #e8e6f0;
  --muted: #9e9ab8;
  --accent: #7c6cf0;
  --accent-light: #a78bfa;
  --glow: rgba(124, 108, 240, 0.35);
  --heading: #ffffff;
  --topbar-bg: rgba(12, 10, 26, 0.7);
  --topbar-mobile-bg: rgba(12, 10, 26, 0.95);
  --hero-overlay: linear-gradient(180deg, transparent 0%, rgba(12, 10, 26, 0.7) 100%);
  --nav-hover-ink: #ffffff;
  --hero-grad-start: #ffffff;
  --hero-grad-end: #e040fb;
  --h4: #c4b5fd;
  --card-hover-shadow: 0 12px 40px rgba(124, 108, 240, 0.15);
  --page-nav-hover-bg: rgba(124, 108, 240, 0.15);
  --info-bg: rgba(0, 188, 212, 0.1);
  --info-border: rgba(0, 188, 212, 0.25);
  --info-ink: #80deea;
  --note-bg: rgba(124, 108, 240, 0.1);
  --note-border: rgba(124, 108, 240, 0.2);
  --note-ink: #c4b5fd;
  --success-bg: rgba(76, 175, 80, 0.12);
  --success-border: rgba(76, 175, 80, 0.25);
  --success-ink: #a5d6a7;
  --grain-opacity: 0.04;
  --orb-opacity: 0.5;
  --orb4-opacity: 0.3;
  --radius: 20px;
  --shadow: 0 24px 64px rgba(0, 0, 0, 0.4);
}

body.light-mode {
  --bg: #f3f5fb;
  --surface: rgba(255, 255, 255, 0.7);
  --glass: rgba(255, 255, 255, 0.82);
  --glass-border: rgba(67, 56, 202, 0.2);
  --ink: #1f2441;
  --muted: #5d6389;
  --accent: #4f46e5;
  --accent-light: #4338ca;
  --glow: rgba(79, 70, 229, 0.3);
  --heading: #171c35;
  --topbar-bg: rgba(243, 245, 251, 0.8);
  --topbar-mobile-bg: rgba(243, 245, 251, 0.95);
  --hero-overlay: linear-gradient(180deg, transparent 0%, rgba(243, 245, 251, 0.62) 100%);
  --nav-hover-ink: #171c35;
  --hero-grad-start: #10152f;
  --hero-grad-end: #4f46e5;
  --h4: #3d43b6;
  --card-hover-shadow: 0 14px 34px rgba(61, 67, 182, 0.18);
  --page-nav-hover-bg: rgba(79, 70, 229, 0.18);
  --info-bg: rgba(14, 165, 233, 0.12);
  --info-border: rgba(14, 165, 233, 0.26);
  --info-ink: #0f4f69;
  --note-bg: rgba(79, 70, 229, 0.12);
  --note-border: rgba(79, 70, 229, 0.26);
  --note-ink: #2f348a;
  --success-bg: rgba(22, 163, 74, 0.12);
  --success-border: rgba(22, 163, 74, 0.26);
  --success-ink: #155f35;
  --grain-opacity: 0.02;
  --orb-opacity: 0.35;
  --orb4-opacity: 0.22;
  --shadow: 0 20px 56px rgba(39, 45, 82, 0.18);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: "Poppins", "Segoe UI", sans-serif;
  color: var(--ink);
  background: var(--bg);
  overflow-x: hidden;
  min-height: 100vh;
  transition: background-color 0.35s ease, color 0.35s ease;
}

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

ul { list-style: none; }

/* ── Radiant animated background ──────────────────────── */
.radiant {
  position: fixed;
  inset: 0;
  z-index: -2;
  overflow: hidden;
}

.radiant .orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  opacity: var(--orb-opacity);
  will-change: transform;
}

.orb-1 {
  width: 600px; height: 600px;
  background: radial-gradient(circle, #7c6cf0 0%, transparent 70%);
  top: -15%; left: -10%;
  animation: orbit1 22s ease-in-out infinite alternate;
}

.orb-2 {
  width: 500px; height: 500px;
  background: radial-gradient(circle, #e040fb 0%, transparent 70%);
  bottom: -10%; right: -8%;
  animation: orbit2 18s ease-in-out infinite alternate;
}

.orb-3 {
  width: 400px; height: 400px;
  background: radial-gradient(circle, #00bcd4 0%, transparent 70%);
  top: 40%; left: 50%;
  animation: orbit3 25s ease-in-out infinite alternate;
}

.orb-4 {
  width: 350px; height: 350px;
  background: radial-gradient(circle, #ff6f00 0%, transparent 70%);
  top: 10%; right: 25%;
  animation: orbit4 20s ease-in-out infinite alternate;
  opacity: var(--orb4-opacity);
}

@keyframes orbit1 {
  0%   { transform: translate(0, 0) scale(1); }
  100% { transform: translate(120px, 80px) scale(1.15); }
}
@keyframes orbit2 {
  0%   { transform: translate(0, 0) scale(1); }
  100% { transform: translate(-100px, -60px) scale(1.2); }
}
@keyframes orbit3 {
  0%   { transform: translate(0, 0) scale(1); }
  100% { transform: translate(-80px, 50px) scale(0.9); }
}
@keyframes orbit4 {
  0%   { transform: translate(0, 0) scale(1); }
  100% { transform: translate(60px, -70px) scale(1.1); }
}

.grain {
  position: fixed;
  inset: 0;
  z-index: -1;
  opacity: var(--grain-opacity);
  pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-repeat: repeat;
  background-size: 180px;
}

/* ── Page transition ──────────────────────────────────── */
.page-enter {
  animation: pageIn 0.65s cubic-bezier(0.22, 1, 0.36, 1) both;
}

@keyframes pageIn {
  from { opacity: 0; transform: translateY(24px) scale(0.98); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

/* ── Topbar ───────────────────────────────────────────── */
.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 14px 28px;
  background: var(--topbar-bg);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--glass-border);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-right: auto;
}

.brand-dot {
  width: 10px; height: 10px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 12px var(--glow);
}

.brand h1 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--heading);
}

.brand-sub {
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--muted);
}

.main-nav ul {
  display: flex;
  gap: 6px;
}

.main-nav a {
  display: inline-block;
  padding: 9px 16px;
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--muted);
  border: 1px solid transparent;
  transition: all 0.25s ease;
}

.main-nav a:hover {
  color: var(--nav-hover-ink);
  border-color: var(--glass-border);
  background: var(--glass);
}

.main-nav a.active {
  color: #fff;
  background: var(--accent);
  border-color: transparent;
  box-shadow: 0 0 20px var(--glow);
}

.menu-toggle {
  display: none;
  width: 40px; height: 40px;
  border-radius: 12px;
  border: 1px solid var(--glass-border);
  background: var(--glass);
  cursor: pointer;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
}

.menu-toggle span {
  display: block;
  width: 18px; height: 2px;
  background: var(--heading);
  border-radius: 2px;
  transition: 0.3s ease;
}

/* ── Theme switch (night / light) ────────────────────── */
.theme-switch-wrap {
  display: inline-flex;
  align-items: center;
}

.switch {
  position: relative;
  display: inline-block;
  width: 60px;
  height: 34px;
}

.switch .theme-input {
  opacity: 0;
  width: 0;
  height: 0;
}

.switch .slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: #2196f3;
  transition: 0.4s;
  z-index: 0;
  overflow: hidden;
}

.switch .sun-moon {
  position: absolute;
  height: 26px;
  width: 26px;
  left: 4px;
  bottom: 4px;
  background-color: yellow;
  transition: 0.4s;
}

.switch .theme-input:checked + .slider {
  background-color: #08080d;
}

.switch .theme-input:focus + .slider {
  box-shadow: 0 0 1px #2196f3;
}

.switch .theme-input:checked + .slider .sun-moon {
  transform: translateX(26px);
  background-color: white;
}

.moon-dot {
  opacity: 0;
  transition: 0.4s;
  fill: gray;
}

.switch .theme-input:checked + .slider .sun-moon .moon-dot {
  opacity: 1;
}

.switch .slider.round {
  border-radius: 34px;
}

.switch .slider.round .sun-moon {
  border-radius: 50%;
}

#moon-dot-1 {
  left: 10px;
  top: 3px;
  position: absolute;
  width: 6px;
  height: 6px;
  z-index: 4;
}

#moon-dot-2 {
  left: 2px;
  top: 10px;
  position: absolute;
  width: 10px;
  height: 10px;
  z-index: 4;
}

#moon-dot-3 {
  left: 16px;
  top: 18px;
  position: absolute;
  width: 3px;
  height: 3px;
  z-index: 4;
}

#light-ray-1 {
  left: -8px;
  top: -8px;
  position: absolute;
  width: 43px;
  height: 43px;
  z-index: -1;
  fill: white;
  opacity: 0.1;
}

#light-ray-2 {
  left: -50%;
  top: -50%;
  position: absolute;
  width: 55px;
  height: 55px;
  z-index: -1;
  fill: white;
  opacity: 0.1;
}

#light-ray-3 {
  left: -18px;
  top: -18px;
  position: absolute;
  width: 60px;
  height: 60px;
  z-index: -1;
  fill: white;
  opacity: 0.1;
}

.cloud-light {
  position: absolute;
  fill: #eee;
  animation-name: cloud-move;
  animation-duration: 6s;
  animation-iteration-count: infinite;
}

.cloud-dark {
  position: absolute;
  fill: #ccc;
  animation-name: cloud-move;
  animation-duration: 6s;
  animation-iteration-count: infinite;
  animation-delay: 1s;
}

#cloud-1 {
  left: 30px;
  top: 15px;
  width: 40px;
}

#cloud-2 {
  left: 44px;
  top: 10px;
  width: 20px;
}

#cloud-3 {
  left: 18px;
  top: 24px;
  width: 30px;
}

#cloud-4 {
  left: 36px;
  top: 18px;
  width: 40px;
}

#cloud-5 {
  left: 48px;
  top: 14px;
  width: 20px;
}

#cloud-6 {
  left: 22px;
  top: 26px;
  width: 30px;
}

@keyframes cloud-move {
  0% {
    transform: translateX(0px);
  }

  40% {
    transform: translateX(4px);
  }

  80% {
    transform: translateX(-4px);
  }

  100% {
    transform: translateX(0px);
  }
}

.stars {
  transform: translateY(-32px);
  opacity: 0;
  transition: 0.4s;
}

.star {
  fill: white;
  position: absolute;
  transition: 0.4s;
  animation-name: star-twinkle;
  animation-duration: 2s;
  animation-iteration-count: infinite;
}

.switch .theme-input:checked + .slider .stars {
  transform: translateY(0);
  opacity: 1;
}

#star-1 {
  width: 20px;
  top: 2px;
  left: 3px;
  animation-delay: 0.3s;
}

#star-2 {
  width: 6px;
  top: 16px;
  left: 3px;
}

#star-3 {
  width: 12px;
  top: 20px;
  left: 10px;
  animation-delay: 0.6s;
}

#star-4 {
  width: 18px;
  top: 0px;
  left: 18px;
  animation-delay: 1.3s;
}

@keyframes star-twinkle {
  0% {
    transform: scale(1);
  }

  40% {
    transform: scale(1.2);
  }

  80% {
    transform: scale(0.8);
  }

  100% {
    transform: scale(1);
  }
}

/* ── Hero title banner ────────────────────────────────── */
.hero-banner {
  position: relative;
  padding: clamp(48px, 8vw, 100px) 28px clamp(36px, 6vw, 72px);
  text-align: center;
  overflow: hidden;
}

.hero-banner::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--hero-overlay);
  pointer-events: none;
}

.hero-banner .hero-inner {
  position: relative;
  z-index: 1;
  width: min(1200px, 92vw);
  margin: 0 auto;
}

.hero-label {
  display: inline-block;
  font-size: 0.76rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--accent-light);
  border: 1px solid rgba(124, 108, 240, 0.3);
  border-radius: 999px;
  padding: 8px 18px;
  margin-bottom: 18px;
  animation: fadeSlide 0.6s 0.1s both;
}

.hero-title {
  font-size: clamp(2.2rem, 5.5vw, 4.2rem);
  font-weight: 800;
  line-height: 1.08;
  background: linear-gradient(135deg, var(--hero-grad-start) 0%, var(--accent-light) 50%, var(--hero-grad-end) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 14px;
  animation: fadeSlide 0.6s 0.2s both;
}

.hero-sub {
  font-size: clamp(1rem, 1.6vw, 1.2rem);
  color: var(--muted);
  max-width: 640px;
  margin: 0 auto;
  line-height: 1.6;
  animation: fadeSlide 0.6s 0.35s both;
}

.hero-profile .hero-inner.hero-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: clamp(20px, 3vw, 40px);
  text-align: left;
}

.hero-profile .hero-copy {
  justify-self: start;
  transform: translateX(0);
  animation: profileTextShift 0.85s cubic-bezier(0.22, 1, 0.36, 1) both;
}

.hero-profile .hero-sub {
  margin: 0;
  max-width: 620px;
}

.hero-profile .hero-photo-wrap {
  justify-self: end;
  width: min(300px, 31vw);
  aspect-ratio: 3 / 4;
  border-radius: 26px;
  overflow: hidden;
  border: 1px solid var(--glass-border);
  background: linear-gradient(155deg, color-mix(in srgb, var(--accent) 24%, transparent), color-mix(in srgb, var(--accent-light) 16%, transparent));
  box-shadow: 0 24px 54px rgba(0, 0, 0, 0.34);
  transform: translateX(36px) scale(0.96);
  opacity: 0;
  animation: profilePhotoIn 0.9s 0.2s cubic-bezier(0.22, 1, 0.36, 1) both;
}

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

@keyframes profileTextShift {
  from {
    opacity: 0;
    transform: translateX(28px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes profilePhotoIn {
  from {
    opacity: 0;
    transform: translateX(42px) scale(0.94);
  }
  to {
    opacity: 1;
    transform: translateX(0) scale(1);
  }
}

@keyframes fadeSlide {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── Content layout ───────────────────────────────────── */
.content {
  width: min(1200px, 92vw);
  margin: 0 auto;
  padding: 0 0 80px;
}

.sheet {
  background: var(--surface);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: clamp(22px, 3.5vw, 38px);
  margin-bottom: 20px;
  backdrop-filter: blur(6px);
  box-shadow: var(--shadow);
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.sheet.revealed {
  opacity: 1;
  transform: translateY(0);
}

.sheet h2 {
  font-size: clamp(1.5rem, 2.8vw, 2.2rem);
  font-weight: 700;
  margin-bottom: 14px;
  color: var(--heading);
}

.sheet h3 {
  font-size: clamp(1.05rem, 1.6vw, 1.3rem);
  font-weight: 700;
  color: var(--accent-light);
  margin-bottom: 8px;
}

.sheet h4 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--h4);
  margin-bottom: 6px;
}

.sheet p, .sheet li, .sheet blockquote {
  font-size: clamp(0.92rem, 1.15vw, 1.05rem);
  line-height: 1.65;
  color: var(--ink);
}

/* Aere les textes longs avec un leger alinea et plus d'espace entre paragraphes */
.sheet > p {
  max-width: 82ch;
  text-indent: 1.1em;
}

.sheet > p + p {
  margin-top: 0.9em;
}

.sheet ul { padding-left: 20px; }
.sheet li { list-style: disc; margin-bottom: 4px; }

.eyebrow {
  display: inline-block;
  background: rgba(124, 108, 240, 0.15);
  border: 1px solid rgba(124, 108, 240, 0.25);
  color: var(--accent-light);
  border-radius: 10px;
  padding: 8px 14px;
  font-size: 0.88rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 14px;
}

/* ── Grid layouts ─────────────────────────────────────── */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; align-items: start; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.timeline { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 16px; }
.full { grid-column: 1 / -1; }

/* ── Cards ────────────────────────────────────────────── */
.soft-card, .line-card, .cert-card, .timeline article, .stats article {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: 14px;
  padding: 16px 18px;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.cert-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.cert-card p {
  flex: 1;
}

.soft-card:hover, .line-card:hover, .cert-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--card-hover-shadow);
}

.cert-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 6px;
}

.cert-icon {
  width: 44px;
  height: 44px;
  object-fit: contain;
  flex: 0 0 44px;
  padding: 7px;
  border-radius: 12px;
  background: color-mix(in srgb, var(--accent) 12%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent) 28%, transparent);
}

.stage-icon {
  width: 70px;
  height: 70px;
  object-fit: contain;
  flex: 0 0 70px;
  padding: 10px;
  border-radius: 12px;
  background: color-mix(in srgb, var(--accent) 12%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent) 28%, transparent);
}

.cert-head h3 {
  margin-bottom: 0;
}

.cert-doc-link {
  --transition: 350ms;
  --folder-W: 56px;
  --folder-H: 38px;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  align-self: flex-start;
  margin-top: 4px;
  padding: 8px 11px;
  border-radius: 10px;
  border: 1px solid color-mix(in srgb, var(--accent) 34%, transparent);
  background: color-mix(in srgb, var(--accent) 12%, transparent);
  color: var(--heading);
  font-size: 0.82rem;
  font-weight: 600;
  white-space: nowrap;
  transition: transform var(--transition) ease, box-shadow var(--transition) ease, background-color var(--transition) ease;
}

.cert-doc-link:hover {
  transform: translateY(-1px);
  box-shadow: 0 10px 20px color-mix(in srgb, var(--accent) 25%, transparent);
  background: color-mix(in srgb, var(--accent) 20%, transparent);
}

.cert-doc-container {
  display: inline-flex;
  align-items: flex-end;
  justify-content: center;
  width: calc(var(--folder-W) + 10px);
  height: calc(var(--folder-H) + 14px);
  position: relative;
  overflow: hidden;
  border-radius: 8px;
}

.cert-doc-folder {
  position: relative;
  display: block;
  width: var(--folder-W);
  height: var(--folder-H);
  animation: certDocFloat 2.5s infinite ease-in-out;
  transition: transform var(--transition) ease;
}

.cert-doc-link:hover .cert-doc-folder {
  transform: scale(1.05);
}

.cert-doc-folder .front-side,
.cert-doc-folder .back-side {
  display: block;
  position: absolute;
  left: 0;
  bottom: 0;
  width: var(--folder-W);
  height: var(--folder-H);
  transform-origin: bottom center;
  transition: transform var(--transition);
}

.cert-doc-folder .back-side::before,
.cert-doc-folder .back-side::after {
  content: "";
  display: block;
  background-color: #fff;
  opacity: 0.5;
  z-index: 0;
  width: var(--folder-W);
  height: var(--folder-H);
  position: absolute;
  transform-origin: bottom center;
  border-radius: 10px;
  transition: transform var(--transition);
  z-index: 0;
}

.cert-doc-link:hover .cert-doc-folder .back-side::before {
  transform: rotateX(-5deg) skewX(5deg);
}

.cert-doc-link:hover .cert-doc-folder .back-side::after {
  transform: rotateX(-15deg) skewX(12deg);
}

.cert-doc-folder .front-side {
  z-index: 2;
}

.cert-doc-link:hover .cert-doc-folder .front-side {
  transform: rotateX(-40deg) skewX(15deg);
}

.cert-doc-folder .tip {
  position: absolute;
  top: -5px;
  left: 0;
  width: 37px;
  height: 10px;
  border-radius: 10px 10px 0 0;
  background: linear-gradient(135deg, #ff9a56, #ff6f56);
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
  z-index: 3;
}

.cert-doc-folder .cover {
  display: block;
  width: var(--folder-W);
  height: var(--folder-H);
  border-radius: 10px;
  background: linear-gradient(135deg, #ffe563, #ffc663);
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.28);
}

@keyframes certDocFloat {
  0% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
  100% { transform: translateY(0); }
}

/* ══════════════════════════════════════════════════════
   Certification PDF Modal (folder open animation)
   ══════════════════════════════════════════════════════ */
.cert-modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: rgba(0, 0, 0, 0);
  backdrop-filter: blur(0);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: background 0.5s ease, backdrop-filter 0.5s ease, opacity 0.4s ease, visibility 0s 0.5s;
}

.cert-modal-overlay.is-opening,
.cert-modal-overlay.is-open {
  opacity: 1;
  visibility: visible;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(8px);
  transition: background 0.5s ease, backdrop-filter 0.5s ease, opacity 0.4s ease;
}

/* Giant animated folder */
.cert-modal-folder {
  --modal-folder-W: 140px;
  --modal-folder-H: 95px;
  --transition: 450ms;
  position: absolute;
  width: var(--modal-folder-W);
  height: var(--modal-folder-H);
  transform: scale(0.4);
  opacity: 0;
  transition: transform 0.6s cubic-bezier(0.34, 1.56, 0.64, 1), opacity 0.4s ease;
  z-index: 10;
}

.cert-modal-overlay.is-opening .cert-modal-folder {
  transform: scale(1);
  opacity: 1;
}

.cert-modal-overlay.is-open .cert-modal-folder {
  transform: scale(1.1);
  opacity: 0;
  pointer-events: none;
  transition: transform 0.4s ease, opacity 0.3s ease 0.2s;
}

.cert-modal-folder .front-side,
.cert-modal-folder .back-side {
  display: block;
  position: absolute;
  left: 0;
  bottom: 0;
  width: var(--modal-folder-W);
  height: var(--modal-folder-H);
  transform-origin: bottom center;
  transition: transform var(--transition) ease;
}

.cert-modal-folder .back-side::before,
.cert-modal-folder .back-side::after {
  content: "";
  display: block;
  background-color: #fff;
  opacity: 0.5;
  width: var(--modal-folder-W);
  height: var(--modal-folder-H);
  position: absolute;
  transform-origin: bottom center;
  border-radius: 12px;
  transition: transform var(--transition) ease;
}

.cert-modal-overlay.is-open .cert-modal-folder .back-side::before {
  transform: rotateX(-5deg) skewX(5deg);
}

.cert-modal-overlay.is-open .cert-modal-folder .back-side::after {
  transform: rotateX(-15deg) skewX(12deg);
}

.cert-modal-folder .front-side {
  z-index: 2;
}

.cert-modal-overlay.is-open .cert-modal-folder .front-side {
  transform: rotateX(-50deg) skewX(18deg);
}

.cert-modal-folder .tip {
  display: block;
  position: absolute;
  top: -12px;
  left: 0;
  width: 90px;
  height: 24px;
  border-radius: 12px 12px 0 0;
  background: linear-gradient(135deg, #ff9a56, #ff6f56);
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
  z-index: 3;
}

.cert-modal-folder .cover {
  display: block;
  width: var(--modal-folder-W);
  height: var(--modal-folder-H);
  border-radius: 12px;
  background: linear-gradient(135deg, #ffe563, #ffc663);
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.3);
}

/* PDF viewer container */
.cert-modal-content {
  position: relative;
  width: 90%;
  max-width: 900px;
  height: 85vh;
  max-height: 700px;
  background: var(--bg);
  border-radius: 16px;
  box-shadow: 0 25px 80px rgba(0, 0, 0, 0.5);
  overflow: hidden;
  transform: translateY(60px) scale(0.85);
  opacity: 0;
  transition: transform 0.55s cubic-bezier(0.34, 1.2, 0.64, 1) 0.35s, opacity 0.45s ease 0.35s;
}

.cert-modal-overlay.is-open .cert-modal-content {
  transform: translateY(0) scale(1);
  opacity: 1;
}

.cert-modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  background: color-mix(in srgb, var(--accent) 15%, var(--bg));
  border-bottom: 1px solid color-mix(in srgb, var(--accent) 30%, transparent);
}

.cert-modal-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--heading);
  margin: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 70%;
}

.cert-modal-close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: none;
  border-radius: 50%;
  background: color-mix(in srgb, var(--accent) 20%, transparent);
  color: var(--heading);
  font-size: 1.4rem;
  cursor: pointer;
  transition: background 0.25s ease, transform 0.25s ease;
}

.cert-modal-close:hover {
  background: color-mix(in srgb, var(--accent) 35%, transparent);
  transform: rotate(90deg);
}

.cert-modal-body {
  height: calc(100% - 64px);
  background: #f5f5f5;
}

.cert-pdf-loading {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  color: #2a2a2a;
  font-size: 1rem;
  font-weight: 600;
}

.cert-pdf-viewer {
  height: 100%;
  overflow: auto;
  padding: 16px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.94), rgba(246, 246, 246, 0.92)),
    repeating-linear-gradient(
      45deg,
      rgba(0, 0, 0, 0.015),
      rgba(0, 0, 0, 0.015) 10px,
      transparent 10px,
      transparent 20px
    );
}

.cert-pdf-page {
  display: flex;
  justify-content: center;
  margin: 0 auto 16px;
}

.cert-pdf-page canvas {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: 8px;
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.2);
  background: #fff;
}

.cert-pdf-error {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 14px;
  height: 100%;
  text-align: center;
  padding: 20px;
  color: #2f2f2f;
}

.cert-pdf-error p {
  margin: 0;
}

.cert-pdf-error a {
  color: var(--accent);
  font-weight: 700;
  text-decoration: underline;
}

/* Closing animation */
.cert-modal-overlay.is-closing .cert-modal-content {
  transform: translateY(40px) scale(0.95);
  opacity: 0;
  transition: transform 0.35s ease, opacity 0.3s ease;
}

.cert-modal-overlay.is-closing .cert-modal-folder {
  transform: scale(0.5);
  opacity: 0;
  transition: transform 0.4s ease 0.1s, opacity 0.3s ease 0.1s;
}

.primary-card {
  background: linear-gradient(145deg, rgba(124, 108, 240, 0.2), rgba(224, 64, 251, 0.1));
  border: 1px solid rgba(124, 108, 240, 0.3);
  border-radius: 14px;
  padding: 18px 20px;
}

.primary-card h3, .primary-card strong { color: var(--heading); }
.primary-card li, .primary-card p { color: var(--ink); }

.os-showcase {
  margin-top: 16px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.os-family {
  background: color-mix(in srgb, var(--bg) 70%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent) 28%, transparent);
  border-radius: 12px;
  padding: 14px;
}

.os-family-head {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}

.os-family-head h4 {
  margin-bottom: 0;
  color: var(--heading);
}

.os-family-icon {
  width: 34px;
  height: 34px;
  object-fit: contain;
  padding: 4px;
  border-radius: 10px;
  background: color-mix(in srgb, var(--accent) 12%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent) 28%, transparent);
}

.os-carousel {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 10px;
  align-items: center;
}

.os-nav {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid var(--glass-border);
  background: color-mix(in srgb, var(--accent) 18%, transparent);
  color: var(--heading);
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.os-nav:hover {
  transform: scale(1.08);
  box-shadow: 0 0 18px var(--glow);
  background: color-mix(in srgb, var(--accent) 28%, transparent);
}

.os-carousel-viewport {
  overflow-x: auto;
  overflow-y: visible;
  scrollbar-width: none;
  -ms-overflow-style: none;
  border-radius: 12px;
  padding: 8px 0;
  perspective: 900px;
}

.os-carousel-viewport::-webkit-scrollbar {
  display: none;
}

.os-logo-track {
  display: flex;
  gap: 10px;
  padding: 4px;
}

.os-logo-item {
  --card-size: 120px;
  margin: 0;
  position: relative;
  overflow: hidden;
  width: var(--card-size);
  min-width: var(--card-size);
  max-width: var(--card-size);
  flex: 0 0 var(--card-size);
  min-height: 108px;
  padding: 12px 8px 10px;
  border-radius: 10px;
  border: 1px solid var(--glass-border);
  background: var(--glass);
  text-align: center;
  transform: scale(1);
  transform-origin: center center;
  z-index: 1;
  transition: transform 0.32s cubic-bezier(0.22, 1, 0.36, 1), margin 0.32s cubic-bezier(0.22, 1, 0.36, 1), border-color 0.3s ease, box-shadow 0.3s ease, background-color 0.3s ease;
}

.os-logo-item img {
  width: 50px;
  height: 50px;
  object-fit: contain;
  display: block;
  margin: 4px auto 0;
  transform: scale(1);
  transition: transform 0.35s cubic-bezier(0.22, 1, 0.36, 1), filter 0.35s ease;
}

.os-logo-item figcaption {
  margin-top: 9px;
  font-size: 0.8rem;
  color: var(--ink);
  font-weight: 600;
  line-height: 1.25;
  opacity: 1;
  transform: none;
  text-shadow: none;
  transition: color 0.25s ease, text-shadow 0.25s ease;
}

.os-logo-item:hover,
.os-logo-item:focus-within,
.os-logo-item.is-active {
  transform: scale(1.16);
  z-index: 8;
  border-color: color-mix(in srgb, var(--neon, var(--accent-light)) 65%, var(--glass-border));
  background: color-mix(in srgb, var(--neon, var(--accent-light)) 8%, var(--glass));
  box-shadow: 0 0 22px color-mix(in srgb, var(--neon, var(--accent-light)) 35%, transparent);
}

.os-logo-item:hover + .os-logo-item,
.os-logo-item:focus-within + .os-logo-item,
.os-logo-item.is-active + .os-logo-item {
  transform: translateX(16px);
}

.os-logo-item:hover + .os-logo-item + .os-logo-item,
.os-logo-item:focus-within + .os-logo-item + .os-logo-item,
.os-logo-item.is-active + .os-logo-item + .os-logo-item {
  transform: translateX(8px);
}

.os-logo-item:has(+ .os-logo-item:hover),
.os-logo-item:has(+ .os-logo-item:focus-within),
.os-logo-item:has(+ .os-logo-item.is-active) {
  transform: translateX(-16px);
}

.os-logo-item:has(+ .os-logo-item + .os-logo-item:hover),
.os-logo-item:has(+ .os-logo-item + .os-logo-item:focus-within),
.os-logo-item:has(+ .os-logo-item + .os-logo-item.is-active) {
  transform: translateX(-8px);
}

.os-logo-item:hover img,
.os-logo-item:focus-within img {
  transform: scale(1.2);
  filter: drop-shadow(0 0 14px color-mix(in srgb, var(--neon, var(--accent-light)) 60%, transparent));
}

.os-logo-item:hover figcaption,
.os-logo-item:focus-within figcaption {
  color: var(--neon, var(--accent-light));
  animation: neonPulse 1.6s ease-in-out infinite alternate;
}

@keyframes neonPulse {
  from {
    text-shadow: 0 0 6px color-mix(in srgb, var(--neon, var(--accent-light)) 58%, transparent), 0 0 14px color-mix(in srgb, var(--neon, var(--accent-light)) 36%, transparent);
  }
  to {
    text-shadow: 0 0 10px color-mix(in srgb, var(--neon, var(--accent-light)) 75%, transparent), 0 0 22px color-mix(in srgb, var(--neon, var(--accent-light)) 52%, transparent), 0 0 32px color-mix(in srgb, var(--neon, var(--accent-light)) 30%, transparent);
  }
}

.line-card {
  border-left: 4px solid var(--accent);
}

.timeline article { text-align: center; }

.stats article { text-align: center; }
.stats strong {
  display: block;
  font-size: clamp(2rem, 4vw, 3.2rem);
  color: var(--accent-light);
  line-height: 1;
}
.stats span { color: var(--muted); font-weight: 600; font-size: 0.9rem; }

/* ── Tags ─────────────────────────────────────────────── */
.tags { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 14px; }
.tags span {
  background: rgba(124, 108, 240, 0.12);
  border: 1px solid rgba(124, 108, 240, 0.25);
  color: var(--accent-light);
  border-radius: 8px;
  padding: 7px 14px;
  font-size: 0.88rem;
  font-weight: 500;
}

/* ── Info boxes ───────────────────────────────────────── */
.info-box {
  background: var(--info-bg);
  border: 1px solid var(--info-border);
  border-radius: 12px;
  padding: 14px 16px;
  margin-top: 10px;
  color: var(--info-ink);
}

.note-box {
  margin-top: 12px;
  background: var(--note-bg);
  border: 1px solid var(--note-border);
  border-radius: 12px;
  padding: 14px 16px;
  color: var(--note-ink);
}

.success-box {
  margin-top: 14px;
  background: var(--success-bg);
  border: 1px solid var(--success-border);
  border-radius: 12px;
  padding: 14px 16px;
  color: var(--success-ink);
}

/* ── Contact form ─────────────────────────────────────── */
.contact-form {
  margin-top: 8px;
  display: grid;
  gap: 14px;
}

.field-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.field {
  display: grid;
  gap: 7px;
}

.field span {
  font-size: 0.84rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  color: var(--muted);
}

.field input,
.field select,
.field textarea {
  width: 100%;
  border-radius: 12px;
  border: 1px solid var(--glass-border);
  background: var(--glass);
  color: var(--ink);
  font: inherit;
  padding: 12px 14px;
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
}

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

.field input::placeholder,
.field textarea::placeholder {
  color: var(--muted);
  opacity: 0.75;
}

.field input:focus,
.field select:focus,
.field textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 24%, transparent);
}

.consent {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-size: 0.9rem;
}

.consent input {
  accent-color: var(--accent);
  width: 16px;
  height: 16px;
}

.submit-btn {
  justify-self: start;
  border: 1px solid transparent;
  background: linear-gradient(135deg, var(--accent), var(--accent-light));
  color: #fff;
  border-radius: 12px;
  padding: 12px 18px;
  font-size: 0.92rem;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, filter 0.2s ease;
}

.submit-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 10px 28px var(--glow);
  filter: saturate(1.08);
}

.submit-btn:active {
  transform: translateY(0);
}

blockquote {
  margin: 18px 0 0;
  border-left: 3px solid var(--accent);
  padding: 12px 18px;
  color: var(--muted);
  font-style: italic;
}

/* ── Page nav arrows (bottom) ─────────────────────────── */
.page-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 32px;
  gap: 16px;
}

.page-nav a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 22px;
  border-radius: 14px;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--heading);
  background: var(--glass);
  border: 1px solid var(--glass-border);
  transition: all 0.25s ease;
}

.page-nav a:hover {
  background: var(--page-nav-hover-bg);
  border-color: var(--accent);
  box-shadow: 0 0 24px var(--glow);
  transform: translateY(-2px);
}

.page-nav .spacer { flex: 1; }

/* ── Back to top ──────────────────────────────────────── */
.to-top {
  position: fixed;
  right: 20px;
  bottom: 20px;
  width: 44px; height: 44px;
  border-radius: 50%;
  border: 1px solid var(--glass-border);
  background: rgba(124, 108, 240, 0.2);
  backdrop-filter: blur(8px);
  color: var(--heading);
  font-size: 1.1rem;
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px);
  transition: opacity 0.3s, transform 0.3s;
}
.to-top.visible { opacity: 1; pointer-events: auto; transform: translateY(0); }
.to-top:hover { background: var(--accent); box-shadow: 0 0 20px var(--glow); }

/* ── Footer ───────────────────────────────────────────── */
.site-footer {
  text-align: center;
  padding: 28px 20px;
  color: var(--muted);
  font-size: 0.8rem;
  border-top: 1px solid var(--glass-border);
}

/* ── Responsive ───────────────────────────────────────── */
@media (max-width: 980px) {
  .menu-toggle { display: flex; }
  .main-nav {
    position: absolute;
    top: 100%;
    left: 0; right: 0;
    background: var(--topbar-mobile-bg);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--glass-border);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease;
  }
  .main-nav.open { max-height: 300px; }
  .main-nav ul { flex-direction: column; padding: 12px 20px; gap: 4px; }
  .main-nav a { display: block; }
  .split, .grid-2, .grid-3, .timeline { grid-template-columns: 1fr; }
  .stats { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; }
  .field-grid { grid-template-columns: 1fr; }

  .stats article {
    padding: 12px 10px;
  }

  .stats strong {
    font-size: clamp(1.6rem, 4vw, 2.2rem);
  }

  .stats span {
    font-size: 0.78rem;
  }

  .os-logo-item { min-height: 102px; }
}

@media (max-width: 640px) {
  .topbar { padding: 10px 14px; }
  .hero-banner { padding: 36px 16px 28px; }
  .content { width: 96vw; }
  .page-nav { flex-direction: column; }
  .page-nav a { width: 100%; justify-content: center; }

  .os-nav {
    width: 32px;
    height: 32px;
  }

  .os-logo-item { min-height: 100px; }

  .os-logo-item img {
    width: 40px;
    height: 40px;
  }
}

@media (max-width: 980px) {
  .hero-profile .hero-inner.hero-split {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-profile .hero-copy {
    justify-self: center;
  }

  .hero-profile .hero-sub {
    margin: 0 auto;
  }

  .hero-profile .hero-photo-wrap {
    justify-self: center;
    width: min(250px, 62vw);
  }
}