/* ═══════════════════════════════════════════
   NUMENS Signum — layout.css
   ═══════════════════════════════════════════ */

:root {
  --black:      #080808;
  --near-black: #111111;
  --border:     #2a2a2a;
  --silver:     #8a8a8a;
  --light:      #d0d0d0;
  --white:      #ffffff;
}

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

body {
  background: var(--black);
  color: var(--white);
  font-family: 'DM Sans', sans-serif;
  font-weight: 300;
  line-height: 1.7;
  overflow-x: hidden;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  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)' opacity='0.04'/%3E%3C/svg%3E");
  pointer-events: none;
  z-index: 1000;
  opacity: .4;
}

/* ── NAV ── */
.numens-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 900;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.1rem 3.5rem;
  border-bottom: 1px solid var(--border);
  background: rgba(8,8,8,.88);
  backdrop-filter: blur(18px);
  gap: 1.5rem;
}

.nav-logo { display: flex; align-items: center; gap: .9rem; flex-shrink: 0; }
.logo-mark { display: flex; flex-direction: column; gap: 3px; }
.logo-mark span { display: block; width: 26px; height: 6px; border: 1px solid var(--white); }
.logo-text { font-family: 'Bebas Neue', sans-serif; font-size: 1.25rem; letter-spacing: .25em; color: var(--white); line-height: 1; }
.logo-text sub { font-family: 'DM Sans', sans-serif; font-size: .5rem; letter-spacing: .15em; color: var(--silver); display: block; margin-top: 2px; }

.numens-nav ul { list-style: none; display: flex; gap: 2rem; flex: 1; justify-content: center; }
.numens-nav a { color: var(--silver); text-decoration: none; font-size: .73rem; letter-spacing: .12em; text-transform: uppercase; transition: color .25s; }
.numens-nav a:hover { color: var(--white); }

.nav-right { display: flex; align-items: center; gap: 1.2rem; flex-shrink: 0; }
.nav-cta {
  background: var(--white); color: var(--black) !important;
  padding: .4rem 1.2rem;
  font-weight: 500 !important; font-size: .72rem !important;
  letter-spacing: .1em; text-transform: uppercase;
  text-decoration: none; border: 1px solid var(--white);
  transition: background .25s, color .25s !important;
  white-space: nowrap;
}
.nav-cta:hover { background: transparent !important; color: var(--white) !important; }

/* ── LANG SWITCHER ── */
.lang-switcher { display: flex; align-items: center; gap: .4rem; }
.lang-btn {
  background: none; border: 1px solid transparent;
  cursor: pointer; padding: 2px 3px; border-radius: 2px;
  font-size: 1.15rem; line-height: 1;
  transition: border-color .2s, transform .15s;
  opacity: .5;
}
.lang-btn:hover { opacity: .85; transform: scale(1.1); }
.lang-btn.active { opacity: 1; border-color: var(--border); background: rgba(255,255,255,.07); }

/* ── HERO ── */
.numens-hero {
  min-height: 100vh;
  display: grid; grid-template-columns: 1fr 1fr;
  align-items: center;
  padding: 8rem 4rem 4rem;
  position: relative; overflow: hidden;
}
.numens-hero::after {
  content: '';
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.03) 1px, transparent 1px);
  background-size: 80px 80px;
  pointer-events: none;
}
.hero-content { position: relative; z-index: 2; }
.hero-eyebrow {
  font-family: 'DM Mono', monospace; font-size: .7rem;
  letter-spacing: .2em; color: var(--silver);
  text-transform: uppercase; margin-bottom: 1.5rem;
  display: flex; align-items: center; gap: .8rem;
}
.hero-eyebrow::before { content: ''; display: inline-block; width: 32px; height: 1px; background: var(--silver); }

h1.numens-h1 {
  font-family: 'Bebas Neue', sans-serif;
  font-size: clamp(4rem, 8vw, 7rem);
  line-height: .95; letter-spacing: .04em;
  margin-bottom: 1.5rem; color: var(--white);
}
h1.numens-h1 em { font-style: normal; color: var(--silver); }

.hero-desc { font-size: 1rem; color: var(--light); max-width: 480px; margin-bottom: 2.5rem; line-height: 1.8; }
.hero-actions { display: flex; gap: 1rem; flex-wrap: wrap; }

.btn-primary {
  background: var(--white); color: var(--black);
  padding: .8rem 2rem;
  font-family: 'DM Sans', sans-serif; font-size: .82rem; font-weight: 500;
  letter-spacing: .1em; text-transform: uppercase;
  text-decoration: none; border: 1px solid var(--white);
  cursor: pointer; transition: background .25s, color .25s; display: inline-block;
}
.btn-primary:hover { background: transparent; color: var(--white); }
.btn-ghost {
  background: transparent; color: var(--white);
  padding: .8rem 2rem;
  font-family: 'DM Sans', sans-serif; font-size: .82rem; font-weight: 500;
  letter-spacing: .1em; text-transform: uppercase;
  text-decoration: none; border: 1px solid var(--border);
  cursor: pointer; transition: border-color .25s; display: inline-block;
}
.btn-ghost:hover { border-color: var(--silver); }

/* Hero diagram */
.hero-visual { position: relative; z-index: 2; display: flex; align-items: center; justify-content: center; }
.hero-diagram {
  width: 100%; max-width: 480px;
  border: 1px solid var(--border); padding: 2rem;
  background: var(--near-black); position: relative;
}
.hero-diagram::before {
  content: 'NUMENS SRC 1.0.1';
  position: absolute; top: -1px; left: 1.5rem;
  font-family: 'DM Mono', monospace; font-size: .65rem;
  letter-spacing: .15em; color: var(--silver);
  background: var(--near-black); padding: 0 .5rem;
  transform: translateY(-50%);
}
.diagram-row { display: grid; grid-template-columns: 100px 1fr; gap: .5rem; align-items: center; margin-bottom: .8rem; }
.diagram-label { font-family: 'DM Mono', monospace; font-size: .65rem; color: var(--silver); letter-spacing: .08em; }
.diagram-bar-wrap { height: 28px; border: 1px solid var(--border); background: var(--black); position: relative; overflow: hidden; }
.diagram-bar {
  height: 100%; background: var(--white); opacity: .9;
  animation: barLoad 1.8s ease-out forwards;
  transform-origin: left; transform: scaleX(0);
}
.diagram-bar.b1 { animation-delay: .2s; width: 88%; }
.diagram-bar.b2 { animation-delay: .5s; width: 72%; }
.diagram-bar.b3 { animation-delay: .8s; width: 95%; }
@keyframes barLoad { to { transform: scaleX(1); } }
.diagram-tag { position: absolute; right: .5rem; top: 50%; transform: translateY(-50%); font-family: 'DM Mono', monospace; font-size: .6rem; color: var(--black); }
.diagram-footer { margin-top: 1.5rem; padding-top: 1rem; border-top: 1px solid var(--border); display: flex; justify-content: space-between; }
.diagram-stat { display: flex; flex-direction: column; gap: .2rem; }
.stat-val { font-family: 'Bebas Neue', sans-serif; font-size: 1.4rem; color: var(--white); letter-spacing: .05em; }
.stat-lbl { font-family: 'DM Mono', monospace; font-size: .6rem; color: var(--silver); letter-spacing: .1em; }

/* ── STRIP ── */
.numens-strip {
  border-top: 1px solid var(--border); border-bottom: 1px solid var(--border);
  padding: 1rem 4rem; display: flex; gap: 4rem; overflow: hidden;
  background: var(--near-black);
}
.strip-item { font-family: 'DM Mono', monospace; font-size: .7rem; letter-spacing: .15em; color: var(--silver); text-transform: uppercase; white-space: nowrap; display: flex; align-items: center; gap: .8rem; }
.strip-item::before { content: '◆'; font-size: .4rem; color: var(--silver); }

/* ── SECTION BASE ── */
.numens-section { padding: 6rem 4rem; }
.section-eyebrow { font-family: 'DM Mono', monospace; font-size: .68rem; letter-spacing: .2em; color: var(--silver); text-transform: uppercase; margin-bottom: 1rem; display: flex; align-items: center; gap: .8rem; }
.section-eyebrow::before { content: ''; display: inline-block; width: 24px; height: 1px; background: var(--silver); }
h2.numens-h2 { font-family: 'Bebas Neue', sans-serif; font-size: clamp(2.5rem, 5vw, 4rem); letter-spacing: .04em; line-height: 1; margin-bottom: 1.5rem; color: var(--white); }

/* ── FEATURES ── */
.section-features { background: var(--near-black); border-top: 1px solid var(--border); }
.features-header { display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; align-items: end; margin-bottom: 4rem; }
.features-header p { color: var(--light); font-size: .95rem; line-height: 1.8; }
.features-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; border: 1px solid var(--border); }
.feature-card { padding: 2.2rem 1.8rem; border-right: 1px solid var(--border); position: relative; transition: background .3s; }
.feature-card:last-child { border-right: none; }
.feature-card:hover { background: rgba(255,255,255,.03); }
.feature-icon { width: 36px; height: 36px; border: 1px solid var(--border); display: flex; align-items: center; justify-content: center; margin-bottom: 1.5rem; }
.feature-icon svg { width: 16px; height: 16px; stroke: var(--white); fill: none; stroke-width: 1.5; }
.feature-card h3 { font-size: .9rem; font-weight: 500; letter-spacing: .05em; margin-bottom: .8rem; color: var(--white); font-family: 'DM Sans', sans-serif; }
.feature-card p { font-size: .82rem; color: var(--silver); line-height: 1.7; }
.feature-num { position: absolute; top: 1.2rem; right: 1.4rem; font-family: 'DM Mono', monospace; font-size: .6rem; color: var(--border); }

/* ── HOW ── */
.how-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 6rem; align-items: center; margin-top: 3rem; }
.steps { display: flex; flex-direction: column; }
.step { display: grid; grid-template-columns: 48px 1fr; gap: 1.5rem; align-items: start; padding: 1.8rem 0; border-bottom: 1px solid var(--border); }
.step:first-child { border-top: 1px solid var(--border); }
.step-num { font-family: 'Bebas Neue', sans-serif; font-size: 1.8rem; color: var(--border); line-height: 1; padding-top: .1rem; }
.step h4 { font-size: .9rem; font-weight: 500; margin-bottom: .4rem; color: var(--white); font-family: 'DM Sans', sans-serif; }
.step p { font-size: .82rem; color: var(--silver); line-height: 1.7; }

.ui-mock { border: 1px solid var(--border); background: var(--near-black); padding: 1.5rem; }
.mock-titlebar { display: flex; align-items: center; gap: .5rem; margin-bottom: 1.2rem; padding-bottom: .8rem; border-bottom: 1px solid var(--border); }
.mock-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--border); }
.mock-title { font-family: 'DM Mono', monospace; font-size: .65rem; color: var(--silver); letter-spacing: .1em; margin-left: .5rem; }
.mock-section-label { font-family: 'DM Mono', monospace; font-size: .6rem; color: var(--silver); letter-spacing: .12em; text-transform: uppercase; margin-bottom: .6rem; }
.mock-row { display: flex; align-items: center; gap: .6rem; padding: .45rem .6rem; border: 1px solid var(--border); margin-bottom: .4rem; font-family: 'DM Mono', monospace; font-size: .7rem; color: var(--light); }
.mock-check { width: 14px; height: 14px; border: 1px solid var(--silver); display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.mock-check.on { background: var(--white); border-color: var(--white); }
.mock-check.on::after { content: '✓'; font-size: 9px; color: var(--black); }
.mock-filter-row { display: grid; grid-template-columns: 1fr 80px 1fr; gap: .4rem; margin-top: 1rem; }
.mock-input { background: var(--black); border: 1px solid var(--border); padding: .35rem .5rem; font-family: 'DM Mono', monospace; font-size: .65rem; color: var(--silver); }
.mock-select { background: var(--black); border: 1px solid var(--border); padding: .35rem .5rem; font-family: 'DM Mono', monospace; font-size: .65rem; color: var(--silver); text-align: center; }

/* ── PERFORMANCE ── */
.section-performance { background: var(--near-black); border-top: 1px solid var(--border); }
.perf-grid { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 0; border: 1px solid var(--border); margin-top: 3rem; }
.perf-card { padding: 3rem 2rem; border-right: 1px solid var(--border); text-align: center; }
.perf-card:last-child { border-right: none; }
.perf-val { font-family: 'Bebas Neue', sans-serif; font-size: 3.5rem; letter-spacing: .05em; color: var(--white); line-height: 1; display: block; }
.perf-unit { font-family: 'DM Mono', monospace; font-size: .7rem; color: var(--silver); letter-spacing: .15em; display: block; margin-top: .5rem; margin-bottom: .8rem; }
.perf-desc { font-size: .8rem; color: var(--silver); }

/* ── COMPAT ── */
.compat-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; margin-top: 3rem; }
.compat-col h3 { font-family: 'DM Mono', monospace; font-size: .7rem; letter-spacing: .15em; color: var(--silver); text-transform: uppercase; margin-bottom: 1rem; padding-bottom: .8rem; border-bottom: 1px solid var(--border); }
.compat-item { display: flex; align-items: center; gap: 1rem; padding: .9rem 0; border-bottom: 1px solid var(--border); font-size: .85rem; color: var(--light); }
.compat-badge { width: 6px; height: 6px; border-radius: 50%; background: var(--white); flex-shrink: 0; }

/* ── CONTACT ── */
.section-contact { background: var(--near-black); border-top: 1px solid var(--border); text-align: center; }
.section-contact h2.numens-h2 { font-size: clamp(3rem, 6vw, 5.5rem); margin-bottom: 1rem; }
.section-contact .contact-desc { color: var(--silver); max-width: 520px; margin: 0 auto 2.5rem; }
.contact-cards { display: flex; gap: 0; justify-content: center; border: 1px solid var(--border); max-width: 600px; margin: 3rem auto 0; }
.contact-card { flex: 1; padding: 2rem; border-right: 1px solid var(--border); text-align: left; }
.contact-card:last-child { border-right: none; }
.cc-label { font-family: 'DM Mono', monospace; font-size: .65rem; color: var(--silver); letter-spacing: .15em; text-transform: uppercase; margin-bottom: .5rem; }
.cc-link { color: var(--white); text-decoration: none; font-size: .85rem; transition: color .2s; }
.cc-link:hover { color: var(--light); }

/* ── FOOTER ── */
.numens-footer { border-top: 1px solid var(--border); padding: 2rem 4rem; display: flex; align-items: center; justify-content: space-between; }
.numens-footer p { font-family: 'DM Mono', monospace; font-size: .65rem; color: var(--silver); letter-spacing: .08em; }
.numens-footer a { color: var(--silver); text-decoration: none; transition: color .2s; }
.numens-footer a:hover { color: var(--white); }

/* ── LANG TRANSITION ── */
[data-i18n] { transition: opacity .15s ease; }
.lang-fade { opacity: 0; }

/* ── ANIMATIONS ── */
@keyframes fadeUp { from { opacity: 0; transform: translateY(24px); } to { opacity: 1; transform: translateY(0); } }
.fade-up { animation: fadeUp .9s ease-out forwards; opacity: 0; }
.delay-1 { animation-delay: .15s; }
.delay-2 { animation-delay: .3s; }
.delay-3 { animation-delay: .5s; }
.delay-4 { animation-delay: .7s; }

/* ══════════════════════════════════════════
   HAMBURGER MENU
   ══════════════════════════════════════════ */
.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
  margin-left: .5rem;
  flex-shrink: 0;
  -webkit-tap-highlight-color: transparent;
}
.nav-hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--white);
  transition: transform .3s, opacity .3s;
  transform-origin: center;
}
.nav-hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-hamburger.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.nav-hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile nav drawer */
.nav-drawer {
  display: none;
  position: fixed;
  top: 57px; left: 0; right: 0;
  background: rgba(8,8,8,.97);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  z-index: 850;
  padding: 1.5rem 1.5rem 2rem;
  flex-direction: column;
  gap: 0;
}
.nav-drawer.open { display: flex; }
.nav-drawer a {
  display: block;
  color: var(--light);
  text-decoration: none;
  font-size: .85rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  padding: 1rem 0;
  border-bottom: 1px solid var(--border);
  transition: color .2s;
}
.nav-drawer a:last-child { border-bottom: none; }
.nav-drawer a:hover { color: var(--white); }
.nav-drawer .drawer-cta {
  margin-top: 1.5rem;
  background: var(--white);
  color: var(--black) !important;
  text-align: center;
  padding: .9rem;
  font-weight: 500;
  border-bottom: none !important;
}

/* ══════════════════════════════════════════
   TABLET  ≤ 960px
   ══════════════════════════════════════════ */
@media (max-width: 960px) {
  /* Nav */
  .numens-nav { padding: 1rem 1.5rem; }
  .numens-nav ul { display: none; }
  .nav-hamburger { display: flex; }
  .nav-right .nav-cta { display: none; }  /* shown in drawer instead */

  /* Hero */
  .numens-hero { grid-template-columns: 1fr; padding: 6rem 1.5rem 3rem; }
  .hero-visual { margin-top: 2.5rem; }

  /* Sections */
  .numens-section { padding: 4rem 1.5rem; }
  .features-header { grid-template-columns: 1fr; gap: 1rem; }
  .features-grid { grid-template-columns: 1fr 1fr; }
  .feature-card:nth-child(2) { border-right: none; }
  .feature-card:nth-child(1),
  .feature-card:nth-child(2) { border-bottom: 1px solid var(--border); }

  .how-grid { grid-template-columns: 1fr; gap: 2.5rem; }

  .perf-grid { grid-template-columns: 1fr; }
  .perf-card { border-right: none; border-bottom: 1px solid var(--border); }
  .perf-card:last-child { border-bottom: none; }

  .compat-grid { grid-template-columns: 1fr; gap: 2rem; }

  .contact-cards { flex-direction: column; max-width: 100%; }
  .contact-card { border-right: none; border-bottom: 1px solid var(--border); }
  .contact-card:last-child { border-bottom: none; }

  .numens-strip { padding: 1rem 1.5rem; gap: 2.5rem; overflow-x: auto; -webkit-overflow-scrolling: touch; }
  .numens-footer { flex-direction: column; gap: 1rem; text-align: center; padding: 1.5rem; }
}

/* ══════════════════════════════════════════
   MOBILE  ≤ 480px
   ══════════════════════════════════════════ */
@media (max-width: 480px) {
  /* Typography — fluid scaling */
  h1.numens-h1 { font-size: clamp(3rem, 14vw, 5rem); }
  h2.numens-h2 { font-size: clamp(2rem, 10vw, 3rem); }
  .section-contact h2.numens-h2 { font-size: clamp(2.2rem, 11vw, 3.5rem); }

  /* Nav */
  .numens-nav { padding: .85rem 1rem; }
  .logo-text { font-size: 1.1rem; }
  .logo-mark span { width: 22px; height: 5px; }
  .lang-switcher { gap: .25rem; }
  .lang-btn { font-size: 1rem; padding: 1px 2px; }

  /* Hero */
  .numens-hero { padding: 5.5rem 1rem 2.5rem; min-height: auto; }
  .hero-eyebrow { font-size: .62rem; }
  .hero-desc { font-size: .9rem; }
  .btn-primary,
  .btn-ghost {
    width: 100%;
    text-align: center;
    padding: .9rem 1rem;
    font-size: .78rem;
  }
  .hero-actions { flex-direction: column; gap: .75rem; }

  /* Diagram */
  .hero-diagram { padding: 1.5rem 1rem; }
  .diagram-row { grid-template-columns: 70px 1fr; }
  .stat-val { font-size: 1.1rem; }
  .stat-lbl { font-size: .55rem; }

  /* Strip */
  .numens-strip { gap: 1.8rem; padding: .8rem 1rem; }
  .strip-item { font-size: .62rem; }

  /* Sections */
  .numens-section { padding: 3rem 1rem; }
  .section-eyebrow { font-size: .62rem; }

  /* Features — single column on small phones */
  .features-grid { grid-template-columns: 1fr; }
  .feature-card { border-right: none; border-bottom: 1px solid var(--border); }
  .feature-card:last-child { border-bottom: none; }
  .feature-card { padding: 1.8rem 1.2rem; }

  /* How */
  .step { grid-template-columns: 36px 1fr; gap: 1rem; padding: 1.4rem 0; }
  .step-num { font-size: 1.4rem; }
  .step h4 { font-size: .85rem; }
  .step p { font-size: .78rem; }
  .ui-mock { padding: 1.2rem 1rem; }
  .mock-filter-row { grid-template-columns: 1fr; gap: .3rem; }

  /* Performance */
  .perf-card { padding: 2rem 1.2rem; }
  .perf-val { font-size: 2.8rem; }
  .perf-unit { font-size: .62rem; }
  .perf-desc { font-size: .75rem; }

  /* Compatibility */
  .compat-col h3 { font-size: .62rem; }
  .compat-item { font-size: .8rem; padding: .8rem 0; }

  /* Contact */
  .section-contact .contact-desc { font-size: .88rem; }
  .contact-card { padding: 1.5rem 1.2rem; }
  .cc-link { font-size: .8rem; word-break: break-all; }

  /* Footer */
  .numens-footer { padding: 1.2rem 1rem; gap: .75rem; }
  .numens-footer p { font-size: .6rem; }
}

/* ══════════════════════════════════════════
   VERY SMALL  ≤ 360px  (Galaxy S, iPhone SE)
   ══════════════════════════════════════════ */
@media (max-width: 360px) {
  h1.numens-h1 { font-size: clamp(2.6rem, 15vw, 3.5rem); }
  .numens-nav { padding: .75rem .85rem; }
  .lang-btn { font-size: .9rem; }
  .numens-section { padding: 2.5rem .85rem; }
  .numens-hero { padding: 5rem .85rem 2rem; }
  .hero-diagram { padding: 1.2rem .85rem; }
  .diagram-row { grid-template-columns: 60px 1fr; gap: .3rem; }
}