/* =================================================================
   COCHLEA CAP — marketing.css
   Modern White + Deep Forest Green (#0F382C) Design System
   Hardware-Accelerated & Fully Responsive
   ================================================================= */

@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:ital,wght@0,300;0,400;0,500;0,600;0,700;0,800;1,400;1,600&family=Inter:ital,opsz,wght@0,14..32,300;0,14..32,400;0,14..32,500;0,14..32,600;0,14..32,700;0,14..32,800;0,14..32,900&display=swap');

/* ── 1. Reset & Global Box Sizing ─────────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* ── 2. Design Tokens ─────────────────────────────────────── */
:root {
  /* Brand Palette — Crisp White & Deep Forest Green (#0F382C) */
  --bg:             #FFFFFF;
  --bg-subtle:      #F8FAF9;
  --surface:        #F4F8F5;
  --surface-alt:    #ECF3EF;
  --card:           #FFFFFF;
  --card-hover:     #F9FCFA;

  /* Primary Green Accents */
  --accent:         #0F382C;          /* Deep Forest / Emerald Green */
  --accent-h:       #185543;          /* Hover State */
  --accent-deep:    #09241C;          /* Deepest Green */
  --accent-light:   #237A5F;          /* Medium Vibrant Emerald */
  --accent-mint:    #56C596;          /* Mint / Highlight Green */
  --accent-mint-bg: #E8F6F0;          /* Mint Tinted Badge Bg */
  --accent-dim:     rgba(15, 56, 44, 0.07);
  --accent-glow:    rgba(15, 56, 44, 0.16);

  /* Alert / Threshold Colors */
  --alert-red:      #D9383A;
  --alert-red-bg:   #FDECEC;

  /* High-Contrast Typography */
  --text:           #0B1B15;          /* Near-black forest green */
  --text-body:      #2A4238;          /* High readability dark slate green */
  --text-sec:       #48685B;          /* Secondary descriptive text */
  --text-muted:     #739286;          /* Muted meta labels */

  /* Borders & Dividers */
  --border:         rgba(15, 56, 44, 0.08);
  --border-s:       rgba(15, 56, 44, 0.14);
  --border-a:       rgba(15, 56, 44, 0.28);
  --border-focus:   #0F382C;

  /* Elevations & Shadows */
  --shadow-subtle:  0 2px 10px rgba(15, 56, 44, 0.04);
  --shadow-sm:      0 4px 18px rgba(15, 56, 44, 0.06);
  --shadow-md:      0 10px 30px rgba(15, 56, 44, 0.09);
  --shadow-lg:      0 20px 50px rgba(15, 56, 44, 0.13);

  /* Layout */
  --nav-h:          80px;
  --max-w:          1240px;
  --gutter:         clamp(20px, 4.5vw, 64px);

  /* Responsive Typography Scale */
  --fs-hero:        clamp(40px, 6.5vw, 84px);
  --fs-disp:        clamp(32px, 4.2vw, 56px);
  --fs-title:       clamp(26px, 3vw, 40px);
  --fs-head:        clamp(20px, 2vw, 26px);
  --fs-lg:          clamp(16px, 1.4vw, 19px);
  --fs-body:        16px;
  --fs-sm:          14px;
  --fs-xs:          12px;
  --fs-label:       11.5px;

  /* Border Radius */
  --r-xs:           6px;
  --r-sm:           10px;
  --r-md:           16px;
  --r-lg:           22px;
  --r-xl:           30px;
  --r-full:         9999px;

  /* Physics & Transitions */
  --ease-expo:      cubic-bezier(0.16, 1, 0.3, 1);
  --ease-smooth:    cubic-bezier(0.25, 0.1, 0.25, 1);
  --ease-spring:    cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* ── 3. Base Elements ─────────────────────────────────────── */
html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: 'Plus Jakarta Sans', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background-color: var(--bg);
  color: var(--text-body);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
}

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

a {
  text-decoration: none;
  color: inherit;
  transition: color 0.2s var(--ease-smooth);
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

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

/* ── 4. Skip Link for Accessibility ───────────────────────── */
.skip-link {
  position: fixed;
  top: -120px;
  left: 20px;
  z-index: 9999;
  padding: 12px 22px;
  background: var(--accent);
  color: #FFFFFF;
  font-weight: 700;
  font-size: var(--fs-sm);
  border-radius: var(--r-sm);
  box-shadow: var(--shadow-md);
  transition: top 0.25s var(--ease-expo);
}
.skip-link:focus {
  top: 20px;
}

/* ── 5. Navigation Bar ────────────────────────────────────── */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-h);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--gutter);
  background: transparent;
  transition: background 0.4s var(--ease-smooth),
              backdrop-filter 0.4s var(--ease-smooth),
              border-color 0.4s var(--ease-smooth),
              box-shadow 0.4s var(--ease-smooth);
}

.nav.scrolled {
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow-subtle);
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: 13px;
  text-decoration: none;
  flex-shrink: 0;
}

.nav__logo-img {
  height: 52px;
  width: 52px;
  aspect-ratio: 1 / 1;
  object-fit: contain;
  display: block;
  border-radius: var(--r-full);
  box-shadow: 0 4px 14px rgba(15, 56, 44, 0.16);
  transition: transform 0.3s var(--ease-spring);
}

.nav__logo:hover .nav__logo-img {
  transform: scale(1.05);
}

.nav__logo-text {
  font-size: 1.22rem;
  font-weight: 800;
  letter-spacing: -0.025em;
  color: #FFFFFF;
  display: flex;
  align-items: center;
  gap: 4px;
  transition: color 0.4s var(--ease-smooth);
}

.nav.scrolled .nav__logo-text {
  color: var(--accent);
}

.nav__logo-text span {
  color: var(--accent-mint);
  transition: color 0.4s var(--ease-smooth);
}

.nav.scrolled .nav__logo-text span {
  color: var(--accent-light);
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 34px;
}

.nav__link {
  font-size: var(--fs-sm);
  font-weight: 600;
  color: rgba(255, 255, 255, 0.88);
  letter-spacing: 0.01em;
  position: relative;
  padding: 6px 0;
  transition: color 0.25s var(--ease-smooth);
}

.nav.scrolled .nav__link {
  color: var(--text-sec);
}

.nav__link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--accent-mint);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.28s var(--ease-expo);
  border-radius: 2px;
}

.nav.scrolled .nav__link::after {
  background: var(--accent);
}

.nav__link:hover {
  color: #FFFFFF;
}

.nav.scrolled .nav__link:hover {
  color: var(--accent);
}

.nav__link:hover::after {
  transform: scaleX(1);
}

.nav__cta {
  font-size: var(--fs-sm);
  font-weight: 700;
  padding: 10px 22px;
  background: #FFFFFF;
  color: var(--accent);
  border: 1.5px solid transparent;
  border-radius: var(--r-full);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
  transition: all 0.25s var(--ease-smooth);
  letter-spacing: 0.01em;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.nav.scrolled .nav__cta {
  background: var(--accent);
  color: #FFFFFF;
  box-shadow: 0 4px 16px rgba(15, 56, 44, 0.2);
}

.nav__cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 22px rgba(15, 56, 44, 0.28);
}

.nav.scrolled .nav__cta:hover {
  background: var(--accent-h);
}

.nav__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  padding: 10px;
  border-radius: var(--r-sm);
  color: #FFFFFF;
  z-index: 1001;
}

.nav.scrolled .nav__toggle {
  color: var(--accent);
}

.nav__toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
  transition: transform 0.3s var(--ease-expo), opacity 0.2s;
}

.nav__toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}
.nav__toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}
.nav__toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

.nav__mobile {
  display: none;
  position: fixed;
  top: var(--nav-h);
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-s);
  padding: 30px var(--gutter) 40px;
  flex-direction: column;
  gap: 22px;
  z-index: 999;
  box-shadow: var(--shadow-lg);
}

.nav__mobile.open {
  display: flex;
}

.nav__mobile .nav__link {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text);
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
}

.nav__mobile .nav__cta {
  align-self: flex-start;
  margin-top: 10px;
  background: var(--accent);
  color: #FFFFFF;
}

/* ── 6. Layout Utilities ──────────────────────────────────── */
.section {
  padding: clamp(80px, 10vw, 140px) var(--gutter);
  position: relative;
}

.container {
  max-width: var(--max-w);
  margin: 0 auto;
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: var(--fs-label);
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-mint-bg);
  padding: 6px 14px;
  border-radius: var(--r-full);
  margin-bottom: 22px;
  border: 1px solid rgba(15, 56, 44, 0.12);
}

.section-label::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

/* ── 7. Buttons ───────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 15px 32px;
  border-radius: var(--r-full);
  font-size: 15.5px;
  font-weight: 700;
  letter-spacing: -0.01em;
  transition: all 0.25s var(--ease-smooth);
  cursor: pointer;
  white-space: nowrap;
  line-height: 1;
  text-align: center;
}

.btn--primary {
  background: var(--accent);
  color: #FFFFFF;
  box-shadow: 0 4px 18px rgba(15, 56, 44, 0.22);
}

.btn--primary:hover {
  background: var(--accent-h);
  box-shadow: 0 8px 28px rgba(15, 56, 44, 0.32);
  transform: translateY(-2px);
}

.btn--ghost {
  background: transparent;
  color: var(--text);
  border: 1.5px solid var(--border-s);
}

.btn--ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-dim);
  transform: translateY(-2px);
}

.btn--white {
  background: #FFFFFF;
  color: var(--accent);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.14);
}

.btn--white:hover {
  background: #F4F8F5;
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.2);
}

.btn--sm {
  padding: 10px 20px;
  font-size: var(--fs-sm);
}

/* ── 8. Hero Section (Hardware-Accelerated Scrubbing) ──────── */
.hero {
  position: relative;
  height: 100dvh;
  min-height: 660px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding: 0 var(--gutter);
  background: #091A14;
  /* contain removed for smooth GSAP pin */
}

.hero__video-wrap {
  position: absolute;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  transform: translate3d(0, 0, 0);
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  will-change: transform;
}

.hero__video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.42;
  transform: translate3d(0, 0, 0);
  will-change: transform, opacity;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
}

.hero__overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(
    180deg,
    rgba(9, 26, 20, 0.72) 0%,
    rgba(9, 26, 20, 0.38) 42%,
    rgba(15, 56, 44, 0.72) 78%,
    #FFFFFF 100%
  );
  pointer-events: none;
}

.hero__content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 880px;
  margin: 0 auto;
  width: 100%;
  will-change: transform, opacity;
}

.hero__tag {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: var(--fs-label);
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent-mint);
  background: rgba(86, 197, 150, 0.14);
  border: 1px solid rgba(86, 197, 150, 0.28);
  padding: 7px 18px;
  border-radius: var(--r-full);
  margin-bottom: 30px;
}

.hero__title {
  font-size: var(--fs-hero);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.04em;
  color: #FFFFFF;
  margin-bottom: 24px;
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.35);
}

.hero__title em {
  font-style: normal;
  color: var(--accent-mint);
  background: linear-gradient(120deg, #6BE2AE, #8CF0C5);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero__sub {
  font-size: var(--fs-lg);
  color: rgba(255, 255, 255, 0.88);
  line-height: 1.68;
  max-width: 600px;
  margin: 0 auto 40px;
  font-weight: 400;
  text-shadow: 0 1px 12px rgba(0, 0, 0, 0.3);
}

.hero__actions {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 16px;
}

.hero__actions .btn--primary {
  background: var(--accent-mint);
  color: #072218;
  box-shadow: 0 4px 20px rgba(86, 197, 150, 0.35);
}

.hero__actions .btn--primary:hover {
  background: #73EBB7;
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(86, 197, 150, 0.45);
}

.hero__actions .btn--ghost {
  color: #FFFFFF;
  border-color: rgba(255, 255, 255, 0.35);
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(8px);
}

.hero__actions .btn--ghost:hover {
  border-color: #FFFFFF;
  background: rgba(255, 255, 255, 0.18);
  color: #FFFFFF;
}

.hero__scroll {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--accent);
  font-size: var(--fs-xs);
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  z-index: 2;
  pointer-events: none;
}

.hero__scroll-chevron {
  animation: scrollBounce 2.2s ease-in-out infinite;
}

@keyframes scrollBounce {
  0%, 100% { transform: translateY(0); opacity: 0.5; }
  50% { transform: translateY(8px); opacity: 1; }
}

/* ── 9. Problem Section ───────────────────────────────────── */
.problem {
  background: var(--bg);
  position: relative;
  overflow: hidden;
}

.problem::before {
  content: "";
  position: absolute;
  top: -120px;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(15, 56, 44, 0.035) 0%, transparent 70%);
  pointer-events: none;
}

.problem__header {
  text-align: center;
  margin-bottom: clamp(56px, 7vw, 92px);
}

.problem__title {
  font-size: var(--fs-disp);
  font-weight: 800;
  letter-spacing: -0.035em;
  line-height: 1.1;
  color: var(--text);
  max-width: 720px;
  margin: 0 auto;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 60px;
}

.stat-block {
  background: var(--card);
  padding: clamp(36px, 4.5vw, 56px) clamp(24px, 3vw, 36px);
  text-align: center;
  border-radius: var(--r-lg);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-subtle);
  transition: transform 0.3s var(--ease-smooth),
              box-shadow 0.3s var(--ease-smooth),
              border-color 0.3s var(--ease-smooth);
}

.stat-block:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--border-a);
}

.stat-block__num {
  font-size: clamp(48px, 6vw, 76px);
  font-weight: 800;
  letter-spacing: -0.045em;
  line-height: 1;
  color: var(--accent);
  display: block;
  margin-bottom: 10px;
  font-variant-numeric: tabular-nums;
}

.stat-block__unit {
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
  display: block;
  margin-bottom: 12px;
}

.stat-block__desc {
  font-size: var(--fs-sm);
  color: var(--text-sec);
  line-height: 1.58;
  max-width: 260px;
  margin: 0 auto;
}

.problem__context {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-xl);
  padding: clamp(36px, 5vw, 64px);
}

.problem__copy {
  font-size: var(--fs-lg);
  color: var(--text-body);
  line-height: 1.74;
}

.problem__copy strong {
  color: var(--accent);
  font-weight: 700;
}

.problem__copy p + p {
  margin-top: 20px;
}

.problem__image-frame {
  background: #FFFFFF;
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 300px;
  box-shadow: var(--shadow-sm);
}

.problem__image-frame img {
  max-height: 240px;
  width: auto;
  object-fit: contain;
}

/* ── 10. How It Works (Pinned Scroll Section) ─────────────── */
.hiw-section {
  position: relative;
  background: var(--bg-subtle);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  overflow: hidden;
}

.hiw-pin {
  height: 100dvh;
  min-height: 600px;
  max-height: 900px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: clamp(20px, 3vh, 40px) var(--gutter);
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  box-sizing: border-box;
}

.hiw-top {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  padding-bottom: 36px;
  flex-shrink: 0;
}

.hiw-top h2 {
  font-size: var(--fs-title);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  color: var(--text);
  max-width: 560px;
}

.hiw-count {
  font-size: clamp(80px, 9vw, 120px);
  font-weight: 900;
  letter-spacing: -0.06em;
  line-height: 1;
  color: rgba(15, 56, 44, 0.08);
  font-variant-numeric: tabular-nums;
  flex-shrink: 0;
  margin-left: 32px;
  user-select: none;
}

.hiw-body {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: clamp(24px, 4vw, 56px);
  align-items: center;
  flex: 1;
  min-height: 0;
  width: 100%;
}

.hiw-steps-wrap {
  position: relative;
  height: 270px;
}

.hiw-step {
  position: absolute;
  top: 0;
  left: 0;
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.55s var(--ease-expo), transform 0.55s var(--ease-expo);
  pointer-events: none;
  width: 100%;
}

.hiw-step.is-active {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.hiw-step__num {
  display: inline-block;
  font-size: var(--fs-xs);
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-mint-bg);
  padding: 4px 12px;
  border-radius: var(--r-full);
  margin-bottom: 18px;
}

.hiw-step h3 {
  font-size: var(--fs-head);
  font-weight: 800;
  letter-spacing: -0.025em;
  color: var(--text);
  margin-bottom: 14px;
  line-height: 1.25;
}

.hiw-step p {
  font-size: var(--fs-lg);
  color: var(--text-sec);
  line-height: 1.68;
  max-width: 460px;
}

.hiw-visual {
  display: flex;
  align-items: center;
  justify-content: center;
}

.compass-wrap {
  width: clamp(200px, 22vw, 290px);
  height: clamp(200px, 22vw, 290px);
  max-width: 100%;
  aspect-ratio: 1 / 1;
  background: #FFFFFF;
  border-radius: 50%;
  padding: 14px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border);
  margin: 0 auto;
}

.compass-svg {
  width: 100%;
  height: 100%;
  overflow: visible;
}

.compass-sector {
  fill: var(--surface-alt);
  stroke: #FFFFFF;
  stroke-width: 4;
  transition: fill 0.4s var(--ease-expo), filter 0.4s;
}

.compass-sector.is-active {
  fill: var(--accent);
  filter: drop-shadow(0 0 16px rgba(15, 56, 44, 0.38));
}

.compass-label {
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  fill: var(--text-muted);
  transition: fill 0.35s;
}

.compass-label.is-active {
  fill: var(--accent);
  font-weight: 900;
}

.compass-center {
  fill: #FFFFFF;
  stroke: var(--border-s);
  stroke-width: 2;
  filter: drop-shadow(0 2px 6px rgba(0,0,0,0.06));
}

.compass-icon {
  color: var(--accent);
}

.hiw-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  flex-shrink: 0;
}

.hiw-dots {
  display: flex;
  gap: 10px;
}

.hiw-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--border-s);
  transition: background 0.3s, transform 0.3s var(--ease-spring);
}

.hiw-dot.is-active {
  background: var(--accent);
  transform: scale(1.5);
}

.hiw-footer-label {
  font-size: var(--fs-xs);
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: 0.08em;
}

/* ── 11. Research Section ─────────────────────────────────── */
.research {
  background: var(--bg);
}

.research__layout {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 72px;
  align-items: start;
}

.research__copy {
  position: sticky;
  top: calc(var(--nav-h) + 36px);
}

.research__copy h2 {
  font-size: var(--fs-title);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  color: var(--text);
  margin-bottom: 32px;
}

.findings {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.finding {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: 24px 28px;
  border-left: 4px solid transparent;
  transition: border-left-color 0.3s, background 0.3s, transform 0.3s;
}

.finding:hover {
  background: #FFFFFF;
  border-left-color: var(--accent);
  transform: translateX(4px);
  box-shadow: var(--shadow-sm);
}

.finding__label {
  font-size: var(--fs-xs);
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 8px;
}

.finding__text {
  font-size: var(--fs-sm);
  color: var(--text-sec);
  line-height: 1.62;
}

.finding__text strong {
  color: var(--text);
  font-weight: 700;
}

.chart-card {
  background: #FFFFFF;
  border: 1px solid var(--border);
  border-radius: var(--r-xl);
  padding: clamp(28px, 4vw, 44px);
  box-shadow: var(--shadow-sm);
}

.chart-header {
  margin-bottom: 24px;
}

.chart-title {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--text);
  margin-bottom: 6px;
}

.chart-subtitle {
  font-size: var(--fs-xs);
  color: var(--text-muted);
}

.chart-legend {
  display: flex;
  gap: 22px;
  margin-bottom: 24px;
  flex-wrap: wrap;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: var(--fs-xs);
  font-weight: 600;
  color: var(--text-sec);
}

.legend-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
}

.legend-dot--a {
  background: var(--accent);
}

.legend-dot--b {
  background: var(--accent-light);
}

.legend-line {
  width: 22px;
  height: 2px;
  border-top: 2px dashed var(--alert-red);
}

.sound-chart-svg {
  width: 100%;
  height: auto;
  overflow: visible;
}

.chart-grid-line {
  stroke: rgba(15, 56, 44, 0.08);
  stroke-width: 1;
}

.chart-axis-label {
  font-size: 10px;
  fill: var(--text-muted);
  font-family: inherit;
  font-weight: 600;
}

#chart-line-a {
  fill: none;
  stroke: var(--accent);
  stroke-width: 2.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}

#chart-line-b {
  fill: none;
  stroke: var(--accent-light);
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  opacity: 0.7;
}

#chart-threshold {
  stroke: var(--alert-red);
  stroke-width: 2;
  stroke-dasharray: 6 4;
  fill: none;
}

.chart-threshold-label {
  font-size: 9.5px;
  fill: var(--alert-red);
  font-family: inherit;
  font-weight: 800;
  letter-spacing: 0.06em;
}

/* ── 12. Progress Section ─────────────────────────────────── */
.progress-section {
  background: var(--surface);
  border-top: 1px solid var(--border);
}

.progress-section h2 {
  font-size: var(--fs-title);
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text);
  text-align: center;
  margin-bottom: clamp(48px, 6vw, 76px);
}

.stats-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 40px;
}

.stat-cell {
  background: #FFFFFF;
  padding: clamp(32px, 4vw, 48px) clamp(20px, 3vw, 32px);
  text-align: center;
  border-radius: var(--r-lg);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-subtle);
  transition: transform 0.3s, box-shadow 0.3s;
}

.stat-cell:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-sm);
}

.stat-cell__num {
  font-size: clamp(52px, 7vw, 84px);
  font-weight: 800;
  letter-spacing: -0.05em;
  line-height: 1;
  color: var(--accent);
  display: block;
  margin-bottom: 12px;
  font-variant-numeric: tabular-nums;
}

.stat-cell__label {
  font-size: 15px;
  font-weight: 800;
  color: var(--text);
  display: block;
  margin-bottom: 8px;
}

.stat-cell__desc {
  font-size: 13.5px;
  color: var(--text-sec);
  line-height: 1.52;
}

.devices-gallery {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  align-items: start;
  gap: clamp(20px, 3vw, 32px);
  max-width: 1000px;
  margin: 0 auto;
}

.device-card {
  background: #FFFFFF;
  padding: clamp(16px, 2vw, 24px);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  border-radius: var(--r-lg);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-subtle);
  transition: transform 0.3s, box-shadow 0.3s, border-color 0.3s;
}

.device-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--border-a);
}

.device-card img {
  display: block;
  width: 100%;
  height: clamp(260px, 32vw, 380px);
  object-fit: cover;
  object-position: center;
  border-radius: calc(var(--r-lg) - 4px);
  transition: transform 0.45s var(--ease-expo);
}

/* Version 4 uses the supplied portrait photograph, so retain its full composition. */
.device-card--v4 img {
  height: auto;
  aspect-ratio: 405 / 590;
  object-fit: contain;
}

.device-card:hover img {
  transform: scale(1.05);
}

.device-card__version {
  font-size: var(--fs-xs);
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-mint-bg);
  padding: 5px 14px;
  border-radius: var(--r-full);
}

/* ── 13. Roadmap / Future Plans Section (Reliable Visibility) */
.roadmap {
  background: var(--bg);
  display: block !important;
  visibility: visible !important;
  overflow: visible;
  position: relative;
}

.roadmap h2 {
  font-size: var(--fs-title);
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text);
  text-align: center;
  margin-bottom: 16px;
}

.roadmap__sub {
  text-align: center;
  color: var(--text-sec);
  font-size: var(--fs-lg);
  margin-bottom: clamp(48px, 6vw, 76px);
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
}

.roadmap-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.roadmap-card {
  background: #FFFFFF;
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: clamp(32px, 3.8vw, 46px) clamp(24px, 3vw, 36px);
  display: flex;
  flex-direction: column;
  gap: 16px;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-subtle);
  transition: transform 0.3s var(--ease-smooth),
              box-shadow 0.3s var(--ease-smooth),
              border-color 0.3s var(--ease-smooth);
  opacity: 1;
  visibility: visible;
}

.roadmap-card::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  height: 3px;
  width: 0%;
  background: var(--accent);
  transition: width 0.4s var(--ease-expo);
}

.roadmap-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
  border-color: var(--border-a);
}

.roadmap-card:hover::after {
  width: 100%;
}

.roadmap-card__icon {
  width: 48px;
  height: 48px;
  background: var(--accent-mint-bg);
  border: 1px solid rgba(15, 56, 44, 0.12);
  border-radius: var(--r-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
}

.roadmap-card__label {
  font-size: var(--fs-xs);
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-light);
  margin-top: 4px;
}

.roadmap-card h3 {
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text);
  line-height: 1.25;
}

.roadmap-card p {
  font-size: 14.5px;
  color: var(--text-sec);
  line-height: 1.68;
  flex: 1;
}

/* ── 14. Closing Call to Action ───────────────────────────── */
.closing {
  text-align: center;
  background: linear-gradient(180deg, var(--bg) 0%, var(--surface) 100%);
  border-top: 1px solid var(--border);
}

.closing h2 {
  font-size: var(--fs-disp);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1.06;
  color: var(--text);
  margin-bottom: 24px;
}

.closing p {
  font-size: var(--fs-lg);
  color: var(--text-sec);
  line-height: 1.72;
  max-width: 540px;
  margin: 0 auto 44px;
}

/* ── 15. Footer ───────────────────────────────────────────── */
.footer {
  padding: 56px var(--gutter);
  border-top: 1px solid var(--border);
  background: #FFFFFF;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 24px;
}

.footer__brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.footer__logo-img {
  height: 52px;
  width: 52px;
  aspect-ratio: 1 / 1;
  object-fit: contain;
  border-radius: var(--r-full);
  box-shadow: 0 2px 10px rgba(15, 56, 44, 0.12);
}

.footer__brand-text {
  font-size: 1.15rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--accent);
}

.footer__nav {
  display: flex;
  flex-wrap: wrap;
  gap: 28px;
}

.footer__link {
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--text-sec);
  transition: color 0.2s;
}

.footer__link:hover {
  color: var(--accent);
}

.footer__copy {
  font-size: var(--fs-xs);
  font-weight: 500;
  color: var(--text-muted);
}

/* ── 16. Scroll Reveal States ─────────────────────────────── */
.will-reveal {
  opacity: 1;
  transform: none;
}

@media (scripting: none) {
  .will-reveal {
  opacity: 1;
  transform: none;
}
}

/* ── 17. Responsive Breakpoints ───────────────────────────── */
@media (max-width: 1080px) {
  .problem__context {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .problem__copy p {
    margin: 0 auto;
    max-width: 620px;
  }
  .research__layout {
    grid-template-columns: 1fr;
    gap: 48px;
  }
  .research__copy {
    position: relative;
    top: auto;
  }
}

@media (max-width: 900px) {
  .nav {
    height: 68px;
  }
  .nav__logo-img {
    height: 42px;
    width: 42px;
  }
  .nav__links {
    display: none;
  }
  .nav__toggle {
    display: flex;
  }
  .stats-grid,
  .stats-row,
  .devices-gallery,
  .roadmap-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .hiw-section {
    padding: 60px 0;
  }
  .hiw-pin {
    height: auto;
    max-height: none;
    padding: 0 var(--gutter);
  }
  .hiw-top {
    flex-direction: column;
    align-items: flex-start;
    padding-bottom: 24px;
  }
  .hiw-count {
    display: none;
  }
  .hiw-body {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .hiw-steps-wrap {
    position: static;
    height: auto;
    display: flex;
    flex-direction: column;
    gap: 20px;
  }
  .hiw-step {
    position: static;
    opacity: 1;
    transform: none;
    pointer-events: auto;
    background: #FFFFFF;
    border: 1px solid var(--border);
    border-radius: var(--r-md);
    padding: 24px 20px;
    box-shadow: var(--shadow-subtle);
  }
  .hiw-visual {
    margin: 20px auto 0;
  }
  .hiw-footer {
    display: none;
  }
  .footer {
    flex-direction: column;
    align-items: center;
    text-align: center;
    justify-content: center;
    gap: 20px;
  }
  .footer__nav {
    gap: 16px;
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .hero__tag {
    display: none;
  }
  .hero__actions {
    flex-direction: column;
    width: 100%;
  }
  .hero__actions .btn {
    width: 100%;
  }
}

/* ── 18. Motion & Performance ─────────────────────────────── */
/* Smooth hardware-accelerated transitions enabled */