/* ═══════════════════════════════════════════════════════════════════════
   SpectralAnalyzer — Space theme stylesheet
   ═══════════════════════════════════════════════════════════════════════ */

/* ── Variables ──────────────────────────────────────────────────────── */
:root {
  --bg:        #030812;
  --bg2:       #070F22;
  --glass:     rgba(8, 18, 48, 0.72);
  --glass2:    rgba(12, 24, 60, 0.55);
  --blue:      #4FC3F7;
  --purple:    #7B61FF;
  --gold:      #FFD54F;
  --green:     #69F0AE;
  --pink:      #FF80AB;
  --cyan:      #80D8FF;
  --text:      #E2E8F4;
  --muted:     #8892B0;
  --border:    rgba(79,195,247,.14);
  --glow-b:    0 0 24px rgba(79,195,247,.28);
  --glow-p:    0 0 24px rgba(123,97,255,.28);
  --r:         12px;
  --r-lg:      20px;
  --tr:        .3s cubic-bezier(.4,0,.2,1);
  --font:      'Segoe UI', system-ui, -apple-system, sans-serif;
  --mono:      'Consolas', 'Courier New', monospace;
}

/* ── Reset ───────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: var(--blue); text-decoration: none; transition: color var(--tr); }
a:hover { color: #fff; }

/* ── Canvas starfield ────────────────────────────────────────────────── */
#starfield {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}
.page-content { position: relative; z-index: 1; }

/* ── Navigation ─────────────────────────────────────────────────────── */
#main-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: .9rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  transition: background var(--tr), backdrop-filter var(--tr), border var(--tr);
}
#main-nav.scrolled {
  background: rgba(3,8,18,.92);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--border);
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: .55rem;
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: .03em;
  color: var(--text);
}
.nav-logo .logo-icon { font-size: 1.5rem; }
.nav-logo span.accent { color: var(--blue); }
#nav-menu {
  display: flex;
  align-items: center;
  gap: 1.8rem;
  list-style: none;
}
#nav-menu a {
  font-size: .9rem;
  font-weight: 500;
  color: var(--muted);
  letter-spacing: .02em;
  padding-bottom: 2px;
  border-bottom: 2px solid transparent;
  transition: color var(--tr), border-color var(--tr);
}
#nav-menu a:hover, #nav-menu a.active {
  color: var(--text);
  border-color: var(--blue);
}
#nav-cta {
  background: var(--blue);
  color: #000 !important;
  padding: .42rem 1.1rem;
  border-radius: 6px;
  font-weight: 700 !important;
  border: none !important;
  transition: background var(--tr), transform var(--tr) !important;
}
#nav-cta:hover { background: #8dd6f7 !important; transform: translateY(-1px); }
#nav-burger { display: none; background: none; border: none; cursor: pointer; padding: 4px; }
.nav-burger-lines { display: flex; flex-direction: column; }
#nav-burger .nav-burger-lines span {
  display: block; width: 22px; height: 2px;
  background: var(--text); margin: 5px 0;
  transition: transform var(--tr), opacity var(--tr);
}
.nav-burger-label {
  font-size: .65rem;
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--text);
}
#nav-burger.open .nav-burger-lines span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
#nav-burger.open .nav-burger-lines span:nth-child(2) { opacity: 0; }
#nav-burger.open .nav-burger-lines span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ── Hero ────────────────────────────────────────────────────────────── */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 7rem 2rem 5rem;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  border: 1px solid var(--border);
  background: var(--glass);
  backdrop-filter: blur(8px);
  padding: .35rem 1rem;
  border-radius: 999px;
  font-size: .8rem;
  font-weight: 600;
  letter-spacing: .05em;
  color: var(--blue);
  text-transform: uppercase;
  margin-bottom: 2rem;
  animation: fadeDown .8s ease both;
}
.hero-badge .dot {
  width: 6px; height: 6px;
  background: var(--blue);
  border-radius: 50%;
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%,100% { box-shadow: 0 0 0 0 rgba(79,195,247,.5); }
  50%      { box-shadow: 0 0 0 5px rgba(79,195,247,0); }
}
.hero h1 {
  font-size: clamp(2.6rem, 6vw, 5.2rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -.02em;
  background: linear-gradient(135deg, var(--blue) 0%, var(--purple) 45%, var(--gold) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: fadeUp .8s .1s ease both;
}
.hero-sub {
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  color: var(--muted);
  max-width: 600px;
  margin: 1.2rem auto;
  animation: fadeUp .8s .2s ease both;
}
.hero-ctas {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  justify-content: center;
  margin-top: 2.5rem;
  animation: fadeUp .8s .3s ease both;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .75rem 1.8rem;
  border-radius: var(--r);
  font-weight: 700;
  font-size: .95rem;
  cursor: pointer;
  transition: transform var(--tr), box-shadow var(--tr), background var(--tr);
  border: none;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary {
  background: linear-gradient(135deg, var(--blue), var(--purple));
  color: #fff;
  box-shadow: var(--glow-b);
}
.btn-primary:hover { box-shadow: 0 0 32px rgba(79,195,247,.5), 0 0 16px rgba(123,97,255,.3); }
.btn-ghost {
  background: var(--glass);
  color: var(--text);
  border: 1px solid var(--border);
  backdrop-filter: blur(8px);
}
.btn-ghost:hover { background: var(--glass2); border-color: var(--blue); }
.btn-cta {
  background: linear-gradient(135deg, var(--green), var(--cyan));
  color: #06121b;
  font-size: 1.05rem;
  padding: .9rem 2.4rem;
  box-shadow: 0 0 28px rgba(105,240,174,.45);
  animation: ctaPulse 2.4s ease-in-out infinite;
}
.btn-cta:hover {
  box-shadow: 0 0 40px rgba(105,240,174,.7), 0 0 20px rgba(128,216,255,.5);
}
@keyframes ctaPulse {
  0%, 100% { box-shadow: 0 0 22px rgba(105,240,174,.35); }
  50%      { box-shadow: 0 0 36px rgba(105,240,174,.65); }
}
.hero-scroll {
  margin-top: 4rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .4rem;
  color: var(--muted);
  font-size: .78rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  animation: fadeUp .8s .5s ease both;
}
.hero-scroll .arrow { animation: bounce 1.6s infinite; font-size: 1.2rem; }
@keyframes bounce { 0%,100%{transform:translateY(0)} 50%{transform:translateY(6px)} }

/* ── Sections ────────────────────────────────────────────────────────── */
section { padding: 5rem 2rem; }
.section-inner { max-width: 1200px; margin: 0 auto; }
.section-label {
  text-align: center;
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: .75rem;
}
.section-title {
  text-align: center;
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 800;
  letter-spacing: -.02em;
  margin-bottom: .75rem;
}
.section-title .accent-grad {
  background: linear-gradient(135deg, var(--blue), var(--purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.section-desc {
  text-align: center;
  color: var(--muted);
  max-width: 580px;
  margin: 0 auto 3rem;
  font-size: 1.05rem;
}

/* ── Features grid ───────────────────────────────────────────────────── */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
}
.feature-card {
  background: var(--glass);
  border: 1px solid var(--border);
  backdrop-filter: blur(12px);
  border-radius: var(--r-lg);
  padding: 2rem 1.6rem;
  transition: transform var(--tr), border-color var(--tr), box-shadow var(--tr);
}
.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--glow-b);
  border-color: rgba(79,195,247,.35);
}
.feature-icon {
  font-size: 2.2rem;
  margin-bottom: 1rem;
  display: block;
}
.feature-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: .5rem;
}
.feature-card p { color: var(--muted); font-size: .9rem; }

/* ── Gallery grid ────────────────────────────────────────────────────── */
.gallery-filters {
  display: flex;
  flex-wrap: wrap;
  gap: .6rem;
  justify-content: center;
  margin-bottom: 2.5rem;
}
.filter-btn {
  background: var(--glass);
  border: 1px solid var(--border);
  color: var(--muted);
  padding: .4rem 1rem;
  border-radius: 999px;
  font-size: .85rem;
  cursor: pointer;
  transition: all var(--tr);
  font-family: var(--font);
}
.filter-btn:hover, .filter-btn.active {
  background: var(--blue);
  color: #000;
  border-color: var(--blue);
  font-weight: 700;
}
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.5rem;
}
.gallery-card {
  background: var(--glass);
  border: 1px solid var(--border);
  backdrop-filter: blur(12px);
  border-radius: var(--r-lg);
  overflow: hidden;
  transition: transform var(--tr), box-shadow var(--tr), border-color var(--tr);
  display: flex;
  flex-direction: column;
}
.gallery-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0,0,0,.5), var(--glow-b);
  border-color: rgba(79,195,247,.3);
}
.card-img-wrap {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16/10;
  cursor: zoom-in;
}
.card-img-wrap img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform .5s ease;
}
.gallery-card:hover .card-img-wrap img { transform: scale(1.04); }
.card-overlay {
  position: absolute;
  inset: 0;
  background: rgba(3,8,18,.55);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--tr);
}
.card-img-wrap:hover .card-overlay { opacity: 1; }
.card-zoom { font-size: 2rem; }
.card-body { padding: 1.2rem 1.4rem 1.4rem; flex: 1; display: flex; flex-direction: column; gap: .4rem; }
.card-cat {
  font-size: .7rem;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--blue);
}
.card-title { font-size: 1rem; font-weight: 700; line-height: 1.3; }
.card-sub { font-size: .82rem; color: var(--muted); }
.card-desc { font-size: .84rem; color: var(--muted); flex: 1; margin-top: .2rem; }
.card-tags { display: flex; flex-wrap: wrap; gap: .35rem; margin-top: .4rem; }
.tag {
  font-size: .7rem;
  padding: .18rem .55rem;
  border-radius: 4px;
  background: rgba(79,195,247,.1);
  border: 1px solid rgba(79,195,247,.2);
  color: var(--blue);
}
.card-link {
  margin-top: .7rem;
  font-size: .82rem;
  font-weight: 700;
  color: var(--blue);
  align-self: flex-start;
}
.card-link:hover { color: #fff; }

/* ── Featured grid (homepage) ────────────────────────────────────────── */
.featured-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.2rem;
}
.feat-card {
  position: relative;
  border-radius: var(--r);
  overflow: hidden;
  aspect-ratio: 16/10;
  cursor: zoom-in;
  border: 1px solid var(--border);
  transition: transform var(--tr), box-shadow var(--tr);
}
.feat-card:hover {
  transform: scale(1.02);
  box-shadow: 0 0 30px rgba(79,195,247,.2);
}
.feat-card img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform .5s ease;
}
.feat-card:hover img { transform: scale(1.04); }
.feat-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(2,6,15,.98) 0%, rgba(2,6,15,.90) 45%, rgba(2,6,15,.40) 72%, transparent 100%);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 1rem 1rem .95rem;
  opacity: 0;
  transition: opacity .3s ease;
}
.feat-card:hover .feat-overlay { opacity: 1; }
.feat-subtitle {
  font-size: .72rem;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: .25rem;
  text-shadow: 0 1px 4px rgba(0,0,0,.9);
}
.feat-title {
  font-size: .92rem;
  font-weight: 700;
  color: #fff;
  line-height: 1.35;
  text-shadow: 0 1px 4px rgba(0,0,0,.9);
}
.feat-desc {
  font-size: .78rem;
  color: rgba(226,232,244,.92);
  line-height: 1.55;
  margin-top: .5rem;
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  text-shadow: 0 1px 3px rgba(0,0,0,.9);
  transition: max-height .4s ease, opacity .35s ease .08s;
}
.feat-card:hover .feat-desc {
  max-height: 200px;
  opacity: 1;
}

/* Sur appareils tactiles : overlay visible après 1er tap (classe ajoutée par JS) */
.feat-card.touch-active .feat-overlay { opacity: 1; }
.feat-card.touch-active .feat-desc    { max-height: 200px; opacity: 1; }

/* ── Stats bar ───────────────────────────────────────────────────────── */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1.5rem;
  margin: 3rem 0;
}
.stat-item { text-align: center; }
.stat-num {
  font-size: 2.4rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--blue), var(--purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.stat-label { font-size: .82rem; color: var(--muted); margin-top: .2rem; }

/* ── Showcase (case study) ───────────────────────────────────────────── */
.showcase {
  background: linear-gradient(135deg, rgba(20,40,100,.35) 0%, rgba(60,20,120,.2) 100%);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 3rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
  align-items: center;
}
.showcase-text h2 { font-size: 2rem; font-weight: 800; margin-bottom: 1rem; }
.showcase-text p { color: var(--muted); margin-bottom: 1rem; }
.showcase-imgs { display: grid; grid-template-columns: 1fr 1fr; gap: .8rem; }
.showcase-imgs img {
  border-radius: var(--r);
  border: 1px solid var(--border);
  transition: transform var(--tr), box-shadow var(--tr);
  cursor: zoom-in;
}
.showcase-imgs img:first-child { grid-column: 1/-1; }
.showcase-imgs img:hover { transform: scale(1.03); box-shadow: var(--glow-b); }

/* ── Detail page ─────────────────────────────────────────────────────── */
.detail-wrap {
  max-width: 1000px;
  margin: 0 auto;
  padding-top: 7rem;
}
.breadcrumb { font-size: .82rem; color: var(--muted); margin-bottom: 1.5rem; }
.breadcrumb a { color: var(--blue); }
.detail-hero { text-align: center; margin-bottom: 2rem; }
.detail-img {
  max-height: 65vh;
  margin: 0 auto;
  border-radius: var(--r-lg);
  border: 1px solid var(--border);
  cursor: zoom-in;
  box-shadow: 0 20px 60px rgba(0,0,0,.6);
  transition: box-shadow var(--tr);
}
.detail-img:hover { box-shadow: 0 20px 60px rgba(0,0,0,.8), var(--glow-b); }
.detail-info { margin-bottom: 2.5rem; }
.detail-title { font-size: 2rem; font-weight: 800; margin: .4rem 0 .6rem; }
.detail-sub { font-size: 1.1rem; color: var(--blue); margin-bottom: 1rem; }
.detail-desc { color: var(--muted); font-size: 1rem; max-width: 680px; }
.prevnext {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}
.pn-btn {
  background: var(--glass);
  border: 1px solid var(--border);
  padding: .6rem 1.2rem;
  border-radius: var(--r);
  font-size: .88rem;
  color: var(--text);
  transition: all var(--tr);
}
.pn-btn:hover { background: rgba(79,195,247,.15); border-color: var(--blue); color: var(--blue); }
.pn-center { background: linear-gradient(135deg, var(--blue), var(--purple)); color: #fff; border: none; font-weight: 700; }
.pn-center:hover { color: #fff; transform: translateY(-2px); box-shadow: var(--glow-b); }

/* ── Install section ─────────────────────────────────────────────────── */
.install-box {
  background: var(--glass);
  border: 1px solid var(--border);
  backdrop-filter: blur(12px);
  border-radius: var(--r-lg);
  padding: 2.5rem 3rem;
  max-width: 760px;
  margin: 0 auto;
}
.install-steps { counter-reset: step; list-style: none; margin-top: 1.5rem; }
.install-steps li {
  counter-increment: step;
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: .9rem 0;
  border-bottom: 1px solid var(--border);
}
.install-steps li:last-child { border-bottom: none; }
.install-steps li::before {
  content: counter(step);
  min-width: 28px; height: 28px;
  background: linear-gradient(135deg, var(--blue), var(--purple));
  color: #fff;
  border-radius: 50%;
  font-weight: 700;
  font-size: .8rem;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.install-steps li span { color: var(--muted); font-size: .9rem; }
code {
  font-family: var(--mono);
  font-size: .82em;
  background: rgba(79,195,247,.12);
  padding: .15em .45em;
  border-radius: 4px;
  color: var(--blue);
}

/* ── Footer ──────────────────────────────────────────────────────────── */
footer {
  border-top: 1px solid var(--border);
  padding: 2.5rem 2rem;
  text-align: center;
  color: var(--muted);
  font-size: .82rem;
}
footer a { color: var(--blue); }
.footer-inner { max-width: 1200px; margin: 0 auto; display: flex; flex-wrap: wrap; gap: 1rem; justify-content: space-between; align-items: center; }

/* ── Lightbox ────────────────────────────────────────────────────────── */
#lightbox {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: rgba(2,5,15,.94);
  backdrop-filter: blur(6px);
  display: none;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 1rem;
  padding: 2rem;
}
#lightbox.open { display: flex; }
#lb-img {
  max-width: min(90vw, 1200px);
  max-height: 82vh;
  object-fit: contain;
  border-radius: var(--r);
  box-shadow: 0 0 80px rgba(0,0,0,.8);
}
#lb-caption { color: var(--muted); font-size: .85rem; }
.lb-close {
  position: absolute;
  top: 1.5rem; right: 2rem;
  font-size: 1.8rem;
  color: var(--muted);
  background: none;
  border: none;
  cursor: pointer;
  transition: color var(--tr);
  line-height: 1;
}
.lb-close:hover { color: var(--text); }

/* ── Scroll-reveal ───────────────────────────────────────────────────── */
.reveal { opacity: 0; transform: translateY(20px); transition: opacity .55s ease, transform .55s ease; }
.reveal.visible { opacity: 1; transform: none; }

/* ── Animations ──────────────────────────────────────────────────────── */
@keyframes fadeUp   { from { opacity:0; transform:translateY(24px); } to { opacity:1; transform:none; } }
@keyframes fadeDown { from { opacity:0; transform:translateY(-16px);} to { opacity:1; transform:none; } }

/* ── Divider ─────────────────────────────────────────────────────────── */
.divider {
  max-width: 60px; height: 3px;
  background: linear-gradient(90deg, var(--blue), var(--purple));
  border-radius: 2px;
  margin: 0 auto 2.5rem;
}

/* ── Page header (sub-pages) ─────────────────────────────────────────── */
.page-header {
  padding: 8rem 2rem 4rem;
  text-align: center;
}
.page-header h1 { font-size: clamp(2rem, 5vw, 3.5rem); font-weight: 800; margin-bottom: .7rem; }
.page-header p  { color: var(--muted); font-size: 1.1rem; max-width: 580px; margin: 0 auto; }

/* ── Principe section ────────────────────────────────────────────────── */
#principe { background: linear-gradient(180deg, var(--bg) 0%, rgba(7,15,34,.6) 100%); }

.principe-text {
  max-width: 820px;
  margin: 0 auto;
}
.principe-text h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--blue);
  margin: 1.6rem 0 .55rem;
  letter-spacing: .02em;
}
.principe-text h3:first-child { margin-top: 0; }
.principe-text p {
  color: var(--muted);
  font-size: .97rem;
  line-height: 1.75;
  margin-bottom: .7rem;
}
.principe-text p strong { color: var(--text); }
.principe-text em { color: var(--text); font-style: italic; }

.principe-fig {
  margin: 2rem 0 2.2rem;
  text-align: center;
}
.principe-fig img {
  width: 100%;
  max-width: 780px;
  border-radius: var(--r-lg);
  border: 1px solid var(--border);
  box-shadow: 0 8px 40px rgba(0,0,0,.5);
  cursor: zoom-in;
  transition: transform var(--tr), box-shadow var(--tr);
}
.principe-fig img:hover {
  transform: scale(1.01);
  box-shadow: 0 12px 50px rgba(0,0,0,.6), var(--glow-b);
}
.principe-fig figcaption {
  margin-top: .75rem;
  font-size: .78rem;
  color: var(--muted);
  line-height: 1.6;
}

/* ── Responsive mobile ───────────────────────────────────────────────── */
@media (max-width: 768px) {
  #nav-menu {
    position: fixed;
    top: 0; left: 0; right: 0;
    height: 100vh;
    background: rgba(3,8,18,.97);
    flex-direction: column;
    justify-content: center;
    gap: 2rem;
    overflow-y: auto;
    z-index: 200;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity var(--tr), visibility var(--tr);
  }
  #nav-menu.open {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
  }
  #nav-menu a { font-size: 1.2rem; }
  #nav-burger { display: flex; align-items: center; gap: .45rem; z-index: 300; }
  .showcase { grid-template-columns: 1fr; }

  .install-box { padding: 1.8rem; }
  section { padding: 3.5rem 1.2rem; }
}

/* ── Spectra viewer ──────────────────────────────────────────────────── */
.sv-section { margin-top: 2rem; }

.sv-container {
  display: flex;
  gap: 0;
  height: 440px;
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  overflow: hidden;
  background: var(--glass);
  backdrop-filter: blur(12px);
}

.sv-sidebar {
  width: 220px;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  border-right: 1px solid var(--border);
}

.sv-controls {
  display: flex;
  gap: .4rem;
  padding: .7rem;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.sv-btn {
  flex: 1;
  padding: .38rem .5rem;
  border-radius: 6px;
  font-size: .75rem;
  font-weight: 700;
  cursor: pointer;
  border: 1px solid rgba(79,195,247,.35);
  background: rgba(79,195,247,.15);
  color: var(--blue);
  font-family: var(--font);
  transition: all var(--tr);
}
.sv-btn:hover { background: rgba(79,195,247,.28); }
.sv-btn-ghost {
  background: var(--glass);
  color: var(--muted);
  border-color: var(--border);
}
.sv-btn-ghost:hover { color: var(--text); border-color: var(--blue); }

.sv-list {
  flex: 1;
  overflow-y: auto;
  padding: .3rem;
}
.sv-list::-webkit-scrollbar { width: 4px; }
.sv-list::-webkit-scrollbar-track { background: transparent; }
.sv-list::-webkit-scrollbar-thumb { background: rgba(79,195,247,.25); border-radius: 2px; }

.sv-row {
  display: flex;
  align-items: center;
  gap: .55rem;
  padding: .38rem .5rem;
  border-radius: 6px;
  cursor: pointer;
  transition: background var(--tr);
  border: 1px solid transparent;
}
.sv-row:hover { background: rgba(79,195,247,.07); }
.sv-row.sv-active {
  background: rgba(79,195,247,.1);
  border-color: rgba(79,195,247,.18);
}
.sv-row.sv-loading { opacity: .5; }
.sv-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
  opacity: .55;
}
.sv-row.sv-active .sv-dot { opacity: 1; }
.sv-row-info { flex: 1; min-width: 0; }
.sv-row-date { font-size: .78rem; font-weight: 600; color: var(--text); }
.sv-row-meta { font-size: .68rem; color: var(--muted); }
.sv-check {
  font-size: .65rem;
  color: var(--blue);
  opacity: 0;
  flex-shrink: 0;
}
.sv-row.sv-active .sv-check { opacity: 1; }

.sv-plot {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.sv-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: .5rem .8rem;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
  gap: .5rem;
}
.sv-readout {
  font-family: var(--mono);
  font-size: .8rem;
  color: var(--blue);
  min-width: 120px;
}
#sv-reset-btn { flex-shrink: 0; }

#sv-canvas {
  flex: 1;
  display: block;
  cursor: crosshair;
  width: 100%;
}

.sv-hint {
  padding: .28rem .8rem;
  font-size: .68rem;
  color: var(--muted);
  border-top: 1px solid var(--border);
  flex-shrink: 0;
  text-align: center;
}

@media (max-width: 768px) {
  .sv-container { height: auto; flex-direction: column; }
  .sv-sidebar { width: 100%; height: 130px; border-right: none; border-bottom: 1px solid var(--border); }
  .sv-list { flex-direction: row; display: flex; flex-wrap: wrap; gap: .2rem; padding: .3rem; }
  .sv-row { flex-direction: column; align-items: center; gap: .15rem; padding: .3rem .4rem; }
  .sv-row-meta { display: none; }
  #sv-canvas { height: 220px; flex: none; }
}

/* ── Phase diagram ───────────────────────────────────────────────────── */
.pd-layout {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 0;
  height: 740px;
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  overflow: hidden;
  background: var(--glass);
  backdrop-filter: blur(12px);
}

.pd-params-card {
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  padding: .8rem 0 0;
}
.pd-card-title {
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--blue);
  padding: 0 .9rem .55rem;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.pd-params-list {
  flex: 1;
  overflow-y: auto;
  padding: .4rem .5rem;
}
.pd-params-list::-webkit-scrollbar { width: 4px; }
.pd-params-list::-webkit-scrollbar-thumb { background: rgba(79,195,247,.2); border-radius: 2px; }

.pd-param-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: .28rem .4rem;
  border-radius: 5px;
  font-size: .78rem;
  transition: background var(--tr);
}
.pd-param-row:hover { background: rgba(79,195,247,.07); }
.pd-param-key {
  color: var(--muted);
  font-family: var(--mono);
  flex-shrink: 0;
  margin-right: .4rem;
}
.pd-param-val {
  color: var(--text);
  font-weight: 700;
  font-family: var(--mono);
  font-size: .76rem;
  text-align: right;
}

.pd-legend {
  display: flex;
  align-items: center;
  gap: .4rem;
  padding: .6rem .8rem;
  font-size: .72rem;
  color: var(--muted);
  border-top: 1px solid var(--border);
  flex-shrink: 0;
}
.pd-leg-dot { width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0; }

.pd-canvas-wrap {
  display: flex;
  flex-direction: column;
}
#pd-canvas {
  flex: 1;
  display: block;
  cursor: crosshair;
  width: 100%;
}

@media (max-width: 768px) {
  .pd-layout { height: auto; grid-template-columns: 1fr; }
  .pd-params-card { border-right: none; border-bottom: 1px solid var(--border); height: 380px; }
  #pd-canvas { height: 280px; }
}

/* ── Orbital diagram ─────────────────────────────────────────────────── */
.od-layout {
  display: grid;
  grid-template-columns: 220px 1fr;
  height: 480px;
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  overflow: hidden;
  background: var(--glass);
  backdrop-filter: blur(12px);
}
.od-controls {
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  padding: .8rem .7rem .7rem;
  overflow-y: auto;
}
.od-ctrl-group {
  margin-top: 1rem;
}
.od-label {
  display: block;
  font-size: .72rem;
  color: var(--muted);
  margin-bottom: .35rem;
  font-family: var(--mono);
}
.od-slider-row {
  display: flex;
  align-items: center;
  gap: .3rem;
}
.od-slider {
  flex: 1;
  accent-color: var(--blue);
  height: 3px;
  cursor: pointer;
}
.od-range-lim {
  font-size: .68rem;
  color: var(--muted);
  white-space: nowrap;
  font-family: var(--mono);
}
.od-val {
  display: block;
  text-align: right;
  font-family: var(--mono);
  font-size: .78rem;
  font-weight: 700;
  color: var(--blue);
  margin-top: .2rem;
}
.od-legend { margin-top: auto; padding-top: .8rem; border-top: 1px solid var(--border); }
.od-leg-row {
  display: flex;
  align-items: center;
  gap: .45rem;
  font-size: .72rem;
  color: var(--muted);
  margin-bottom: .3rem;
}
.od-leg-dot { width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0; }
.od-note {
  font-size: .66rem;
  color: var(--muted);
  margin-top: .5rem;
  line-height: 1.4;
  opacity: .7;
}
.od-canvas-wrap {
  display: flex;
  flex-direction: column;
}
.showcase-sub {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text);
  margin: .3rem 0 .6rem;
}
.showcase-desc {
  color: var(--muted);
  font-size: .9rem;
  margin-bottom: 1.2rem;
  line-height: 1.6;
}
.disclaimer {
  color: var(--muted);
  font-size: .82rem;
  border-left: 3px solid rgba(255,160,80,.4);
  padding-left: .75rem;
  line-height: 1.55;
}
/* ── Feature card — état actif (clic) ───────────────────────────── */
.feature-card {
  transition: transform var(--tr), box-shadow var(--tr), border-color var(--tr);
}
.feature-card.feat-active {
  border-color: rgba(79,195,247,.55) !important;
  box-shadow: 0 0 0 2px rgba(79,195,247,.25), var(--glow-b);
  transform: translateY(-3px);
}

/* ── Prévisualisation feature ────────────────────────────────────── */
#feat-preview {
  display: none;
  margin-top: 2.5rem;
  text-align: center;
  animation: featFadeIn .35s ease;
}
#feat-preview.feat-preview-visible { display: block; }
@keyframes featFadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}
#feat-preview-img {
  width: 100%;
  max-width: 860px;
  border-radius: var(--r-lg);
  border: 1px solid var(--border);
  box-shadow: 0 8px 48px rgba(0,0,0,.55);
  cursor: zoom-in;
  transition: transform var(--tr), box-shadow var(--tr);
}
#feat-preview-img:hover {
  transform: scale(1.01);
  box-shadow: 0 12px 56px rgba(0,0,0,.65), var(--glow-b);
}
#feat-preview-title {
  margin-top: .75rem;
  font-size: .82rem;
  color: var(--muted);
}

/* ── Info tooltip (data-tooltip) ─────────────────────────────────── */
[data-tooltip] {
  position: relative;
  cursor: help;
}
[data-tooltip]::after {
  content: attr(data-tooltip);
  position: absolute;
  left: 0;
  top: calc(100% + 8px);
  z-index: 200;
  width: 340px;
  background: rgba(7, 17, 45, 0.97);
  border: 1px solid rgba(79,195,247,.25);
  border-radius: 8px;
  padding: .65rem .85rem;
  font-size: .80rem;
  font-weight: 400;
  color: var(--muted);
  line-height: 1.6;
  box-shadow: 0 8px 32px rgba(0,0,0,.55);
  pointer-events: none;
  opacity: 0;
  transform: translateY(-4px);
  transition: opacity .22s, transform .22s;
  white-space: normal;
}
[data-tooltip]:hover::after {
  opacity: 1;
  transform: translateY(0);
}

/* ── Warning marker ⚠ (tooltip géré en JS) ─────────────────────── */
.pd-warn {
  cursor: help;
  color: #FFD54F;
  font-size: .72rem;
  vertical-align: super;
  margin-left: 2px;
}
@media (max-width: 768px) {
  .od-layout { height: auto; grid-template-columns: 1fr; }
  .od-controls { border-right: none; border-bottom: 1px solid var(--border); }
  #od-canvas  { height: 300px; }
}

/* ── Desktop dropdown menu (≥1024px) ─────────────────────────────────── */
.dm-wrap { display: none; }

@media (min-width: 1024px) {
  #main-nav { display: none; }
  footer    { display: none; }

  /* ── Dropdown wrapper ── */
  .dm-wrap {
    display: block;
    position: fixed;
    top: 1.2rem;
    left: 1.2rem;
    z-index: 200;
  }

  /* Toggle button */
  .dm-toggle {
    display: flex;
    align-items: center;
    gap: .55rem;
    background: rgba(3,8,18,.96);
    border: 1px solid var(--border);
    border-radius: var(--r-lg);
    padding: .62rem 1.1rem;
    cursor: pointer;
    color: var(--text);
    font-size: .92rem;
    font-weight: 700;
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    transition: border-color var(--tr), box-shadow var(--tr);
    user-select: none;
    white-space: nowrap;
  }
  .dm-toggle:hover {
    border-color: rgba(79,195,247,.4);
    box-shadow: 0 0 18px rgba(79,195,247,.15);
  }
  .dm-toggle .logo-icon { color: var(--blue); font-size: 1.05rem; }
  .dm-toggle .accent    { color: var(--blue); }
  .dm-burger {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 4px;
    margin-left: .5rem;
  }
  .dm-burger span {
    display: block;
    width: 16px;
    height: 2px;
    background: currentColor;
    border-radius: 1px;
    opacity: .55;
    transition: opacity .22s, transform .22s, width .22s;
  }
  .dm-toggle:hover .dm-burger span { opacity: 1; }
  .dm-menu-label {
    font-size: .62rem;
    font-weight: 700;
    letter-spacing: .1em;
    color: var(--text);
    opacity: .75;
    transition: opacity var(--tr);
  }
  .dm-toggle:hover .dm-menu-label { opacity: 1; }
  .dm-wrap.open .dm-burger span:nth-child(1) { transform: translateY(6px) rotate(45deg); opacity: 1; }
  .dm-wrap.open .dm-burger span:nth-child(2) { width: 0; opacity: 0; }
  .dm-wrap.open .dm-burger span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); opacity: 1; }
  .dm-wrap.open .dm-toggle  { border-color: rgba(79,195,247,.4); }

  /* Dropdown panel */
  .dm-panel {
    position: absolute;
    top: calc(100% + .55rem);
    left: 0;
    min-width: 218px;
    background: rgba(3,8,18,.97);
    border: 1px solid var(--border);
    border-radius: var(--r-lg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: .45rem;
    display: flex;
    flex-direction: column;
    gap: .12rem;
    opacity: 0;
    pointer-events: none;
    transform: translateY(-10px);
    transition: opacity .22s ease, transform .22s ease;
    box-shadow: 0 16px 48px rgba(0,0,0,.55);
  }
  .dm-wrap.open .dm-panel {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
  }

  /* Links */
  .dm-link {
    display: flex;
    align-items: center;
    gap: .65rem;
    padding: .58rem .82rem;
    border-radius: var(--r);
    font-size: .875rem;
    color: var(--muted);
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    user-select: none;
    border: 1px solid transparent;
    transition: all var(--tr);
  }
  .dm-link:hover {
    background: var(--glass);
    color: var(--text);
    border-color: var(--border);
  }
  .dm-link.active {
    background: rgba(79,195,247,.12);
    color: var(--blue);
    border-color: rgba(79,195,247,.25);
    font-weight: 700;
  }
  .dm-icon { font-size: .88rem; width: 1.1rem; text-align: center; flex-shrink: 0; opacity: .55; }
  .dm-link.active .dm-icon { opacity: 1; }
  .dm-link:hover   .dm-icon { opacity: .82; }

  .dm-divider { height: 1px; background: var(--border); margin: .3rem .4rem; }
  .dm-cta {
    display: flex; align-items: center; justify-content: center; gap: .4rem;
    padding: .52rem 1rem;
    background: linear-gradient(135deg, var(--blue), var(--purple));
    color: #fff; border-radius: var(--r);
    font-size: .82rem; font-weight: 700; text-decoration: none;
    margin: .2rem .3rem .1rem; transition: transform var(--tr), box-shadow var(--tr);
  }
  .dm-cta:hover { color: #fff; transform: translateY(-1px); box-shadow: var(--glow-b); }
  .dm-version { text-align: center; font-size: .67rem; color: var(--muted); padding: .25rem .5rem .45rem; }

  /* ── Main content area (full width — no sidebar offset) ── */
  .page-content { margin-left: 0; }

  /* All sections hidden by default; only active one shown */
  .page-content > section                { display: none !important; }
  .page-content > section.section-active { display: block !important; min-height: 100vh; }
  .hero.section-active {
    display: flex !important;
    min-height: 0;
    padding: 5rem 4rem 2.5rem;
  }
  #stats.section-active { min-height: 0 !important; padding: 1.5rem 2rem 3rem; }
  .hero-scroll { display: none; }

  /* Trigger reveal immediately on desktop */
  .section-active .reveal { opacity: 1; transform: none; }
}

/* ── Language switcher ──────────────────────────────────────────── */
.lang-switcher {
  display: flex;
  align-items: center;
  gap: .25rem;
  margin-left: auto;
  flex-shrink: 0;
}
.lang-btn {
  background: none;
  border: 1px solid rgba(79,195,247,.25);
  border-radius: 4px;
  color: var(--muted);
  cursor: pointer;
  font-family: var(--font);
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .08em;
  padding: .22rem .44rem;
  transition: all var(--tr);
  line-height: 1;
}
.lang-btn:hover {
  border-color: var(--blue);
  color: var(--blue);
}
.lang-btn.active {
  background: rgba(79,195,247,.15);
  border-color: var(--blue);
  color: var(--blue);
}

/* Fixed desktop lang switcher (top-right, always visible ≥1024px) */
.lang-switcher-fixed {
  display: none;
}
@media (min-width: 1024px) {
  .lang-switcher-fixed {
    display: flex;
    position: fixed;
    top: .85rem;
    right: 1.5rem;
    z-index: 200;
    gap: .25rem;
  }
}

@media (max-width: 1023px) {
  .lang-switcher {
    margin-left: 0;
    order: -1;
  }
  #main-nav {
    flex-wrap: wrap;
    gap: .5rem;
  }
}

/* ── Dataset tabs (showcase section) ─────────────────────────────── */
.ds-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  margin-bottom: 0;
}
.ds-tab {
  background: rgba(8,18,48,.8);
  border: 1px solid rgba(79,195,247,.2);
  color: var(--muted);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  font-family: var(--font);
  font-size: .87rem;
  font-weight: 600;
  gap: .08rem;
  line-height: 1.2;
  padding: .65rem 1.3rem;
  transition: all var(--tr);
  margin-right: -1px;
  margin-bottom: -1px;
}
.ds-tab:first-child { border-radius: var(--r) 0 0 0; }
.ds-tab:last-child  { border-radius: 0 var(--r) 0 0; }
.ds-tab:hover { color: var(--text); border-color: rgba(79,195,247,.45); }
.ds-tab.active {
  background: rgba(79,195,247,.1);
  border-color: var(--blue);
  border-bottom-color: transparent;
  color: var(--blue);
  z-index: 1;
}
.ds-tab-sub {
  display: block;
  font-size: .72rem;
  font-weight: 400;
  letter-spacing: .02em;
  color: var(--muted);
}
.ds-tab.active .ds-tab-sub { color: rgba(79,195,247,.75); }

.ds-card {
  background: rgba(8,18,48,.7);
  border: 1px solid var(--blue);
  border-radius: 0 var(--r) var(--r) var(--r);
  min-height: 4.5rem;
  padding: 1.4rem 1.8rem;
  margin-bottom: 2.5rem;
  position: relative;
  z-index: 0;
}
.ds-card h4 {
  color: var(--blue);
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: .7rem;
}
.ds-card p {
  color: var(--text);
  font-size: .9rem;
  line-height: 1.75;
  margin-bottom: .6rem;
}
.ds-card p:last-child { margin-bottom: 0; }