:root {
  --charcoal: #2C3238;
  --charcoal-soft: #3D4550;
  --steel: #4A6B8A;
  --steel-light: #6B8AA8;
  --walnut: #5C4A3A;
  --silver: #C8CDD4;
  --silver-bg: #E8EBEF;
  --white: #F9FAFB;
  --font-display: "Instrument Serif", Georgia, serif;
  --font-body: "IBM Plex Sans", system-ui, sans-serif;
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --wrap: min(92%, 1140px);
  --radius: 4px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--charcoal-soft);
  background: var(--white);
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }

:focus-visible { outline: 2px solid var(--steel); outline-offset: 3px; }

.wrap { width: var(--wrap); margin-inline: auto; padding-inline: clamp(1.25rem, 4vw, 2rem); }

/* Header */
.header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.1rem clamp(1.25rem, 4vw, 2.5rem);
  transition: background 0.35s, box-shadow 0.35s;
}
.header.scrolled {
  background: rgba(249, 250, 251, 0.96);
  backdrop-filter: blur(10px);
  box-shadow: 0 1px 0 var(--silver);
}

.logo {
  font-family: var(--font-display);
  font-size: 1.35rem;
  color: var(--charcoal);
  z-index: 2;
}
.logo span { color: var(--steel); }

.menu-btn {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 8px;
  z-index: 2;
}
.menu-btn span {
  width: 22px;
  height: 2px;
  background: var(--charcoal);
  transition: transform 0.3s, opacity 0.3s;
}
.menu-btn[aria-expanded="true"] span:first-child { transform: translateY(4px) rotate(45deg); }
.menu-btn[aria-expanded="true"] span:last-child { transform: translateY(-4px) rotate(-45deg); }

.nav {
  display: none;
  position: fixed;
  inset: 0;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1.25rem;
  background: var(--white);
}
.nav.open { display: flex; }
.nav a {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--charcoal);
}
.nav a:hover { color: var(--steel); }

.lang-btn {
  margin-top: 0.5rem;
  font-size: 0.72rem;
  font-weight: 600;
  padding: 0.4rem 1rem;
  border: 1px solid var(--charcoal);
  color: var(--charcoal);
}
.lang-btn:hover { background: var(--charcoal); color: var(--white); }

/* Hero */
.hero {
  padding-top: 88px;
  background: linear-gradient(135deg, var(--silver-bg) 0%, var(--white) 50%);
  border-bottom: 1px solid var(--silver);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  max-width: 1280px;
  margin-inline: auto;
  padding: clamp(2rem, 6vw, 4rem) clamp(1.25rem, 4vw, 2.5rem);
  align-items: center;
}

.eyebrow {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--steel);
  margin-bottom: 1rem;
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.25rem);
  font-weight: 400;
  line-height: 1.15;
  color: var(--charcoal);
  margin-bottom: 1.25rem;
}

.hero-lead {
  font-size: 1.05rem;
  max-width: 44ch;
  margin-bottom: 2rem;
  color: var(--charcoal-soft);
}

.hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem 2.5rem;
  margin-bottom: 2rem;
  padding: 1.5rem 0;
  border-top: 1px solid var(--silver);
  border-bottom: 1px solid var(--silver);
}
.hero-stats strong {
  display: block;
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--steel);
  line-height: 1.2;
}
.hero-stats span {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--walnut);
}

.btn {
  display: inline-block;
  padding: 0.85rem 1.85rem;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  background: var(--charcoal);
  color: var(--white);
  border-radius: var(--radius);
  transition: background 0.25s, transform 0.25s;
}
.btn:hover {
  background: var(--steel);
  transform: translateY(-2px);
}
.btn-outline {
  background: transparent;
  border: 1px solid var(--silver);
  color: var(--charcoal);
  margin-left: 0.5rem;
}
.btn-outline:hover { border-color: var(--steel); color: var(--steel); }

.hero-img {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 20px 50px rgba(44, 50, 56, 0.12);
}
.hero-img img {
  width: 100%;
  height: clamp(280px, 42vh, 440px);
  object-fit: cover;
}

/* Sections */
.section { padding-block: clamp(4rem, 9vh, 6rem); }
.section-alt { background: var(--silver-bg); }

.label {
  display: block;
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--steel);
  margin-bottom: 0.6rem;
}
.label.center, .center { text-align: center; }

h2 {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 400;
  color: var(--charcoal);
  line-height: 1.2;
  margin-bottom: 1rem;
}

.lead {
  font-size: 1.08rem;
  max-width: 56ch;
  margin-bottom: 2rem;
}

/* Cards */
.card-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}
.card {
  padding: 1.75rem;
  background: var(--white);
  border: 1px solid var(--silver);
  border-radius: var(--radius);
  transition: border-color 0.3s, box-shadow 0.3s;
}
.card:hover {
  border-color: var(--steel-light);
  box-shadow: 0 8px 24px rgba(74, 107, 138, 0.1);
}
.card-num {
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--steel);
  letter-spacing: 0.1em;
  display: block;
  margin-bottom: 0.75rem;
}
.card h3 {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--charcoal);
  margin-bottom: 0.4rem;
}
.card p { font-size: 0.9rem; }

/* Split */
.split {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  align-items: center;
}
.split p { max-width: 48ch; }
.split img,
.full-img {
  width: 100%;
  border-radius: var(--radius);
  object-fit: cover;
}
.split img { height: clamp(260px, 38vh, 380px); }
.full-img {
  height: clamp(280px, 40vh, 400px);
  margin-top: 1rem;
  box-shadow: 0 12px 40px rgba(44, 50, 56, 0.08);
}

.mini-stats {
  display: flex;
  gap: 2rem;
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--silver);
}
.mini-stats strong {
  display: block;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--steel);
}
.mini-stats span {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Acoustic */
.acoustic-box {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  padding: clamp(2rem, 5vw, 3rem);
  background: var(--charcoal);
  color: var(--silver-bg);
  border-radius: var(--radius);
}
.acoustic-box h2 { color: var(--white); }
.acoustic-box .label { color: var(--steel-light); }
.acoustic-box p { opacity: 0.9; max-width: 48ch; }

.ac-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}
.ac-list li {
  font-size: 0.95rem;
  font-weight: 500;
  padding: 0.75rem 1rem;
  background: var(--charcoal-soft);
  border-left: 3px solid var(--steel);
}

/* Timeline */
.process { background: var(--white); }
.timeline {
  list-style: none;
  max-width: 640px;
  margin: 2.5rem auto 0;
  position: relative;
  padding-left: 2rem;
}
.timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(var(--steel), var(--silver));
}
.timeline li {
  position: relative;
  padding-bottom: 2.5rem;
}
.timeline li:last-child { padding-bottom: 0; }
.time-dot {
  position: absolute;
  left: -2rem;
  top: 0.35rem;
  width: 12px;
  height: 12px;
  margin-left: -1px;
  background: var(--steel);
  border: 3px solid var(--white);
  border-radius: 50%;
  box-shadow: 0 0 0 2px var(--steel);
}
.timeline time {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--steel);
}
.timeline h3 {
  font-family: var(--font-display);
  font-size: 1.35rem;
  color: var(--charcoal);
  margin: 0.35rem 0 0.25rem;
}
.timeline p { font-size: 0.92rem; }

/* CTA */
.cta {
  background: linear-gradient(135deg, var(--steel) 0%, var(--charcoal) 100%);
  color: var(--white);
  text-align: center;
}
.cta-inner h2 {
  font-family: var(--font-display);
  color: var(--white);
  max-width: 22ch;
  margin-inline: auto;
  margin-bottom: 1rem;
}
.cta-inner p {
  opacity: 0.92;
  max-width: 46ch;
  margin-inline: auto;
  margin-bottom: 2rem;
}
.cta-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem;
}
.cta .btn { background: var(--white); color: var(--charcoal); }
.cta .btn:hover { background: var(--silver-bg); }
.cta .btn-outline {
  border-color: rgba(255,255,255,0.5);
  color: var(--white);
}
.cta .btn-outline:hover { background: rgba(255,255,255,0.1); }

.footer {
  text-align: center;
  padding: 1.75rem;
  font-size: 0.85rem;
  color: var(--charcoal-soft);
  background: var(--silver-bg);
  border-top: 1px solid var(--silver);
}

/* Reveal */
.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.65s var(--ease), transform 0.65s var(--ease);
}
.reveal.visible { opacity: 1; transform: none; }

@media (min-width: 768px) {
  .menu-btn { display: none; }
  .nav {
    display: flex !important;
    position: static;
    flex-direction: row;
    align-items: center;
    gap: 1.25rem;
    background: none;
    inset: auto;
  }
  .lang-btn { margin-top: 0; }

  .hero-grid { grid-template-columns: 1fr 1.05fr; }
  .card-row { grid-template-columns: repeat(3, 1fr); }
  .split { grid-template-columns: 1fr 1fr; gap: 3.5rem; }
  .split.reverse img { order: -1; }
  .acoustic-box { grid-template-columns: 1.2fr 1fr; align-items: center; }
}

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