:root {
  --brand: #a14d53;
  --brand-dark: #8a3f44;
  --brand-soft: rgba(161, 77, 83, 0.08);
  --bg: #faf9f7;
  --bg-white: #ffffff;
  --text: #141414;
  --text-muted: #5c5c5c;
  --border: #e8e6e3;
  --font: 'Space Grotesk', system-ui, sans-serif;
  --max: 1120px;
  --pad: clamp(1.25rem, 4vw, 2.5rem);
  --header: 72px;
  --radius: 6px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --dur: 0.7s;
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
}

body.loaded .header {
  transform: translateY(0);
  opacity: 1;
}

::selection {
  background: var(--brand-soft);
  color: var(--brand-dark);
}

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

img {
  display: block;
  max-width: 100%;
}

button, input {
  font: inherit;
  border: none;
  background: none;
}

.container {
  width: min(var(--max), 100% - var(--pad) * 2);
  margin-inline: auto;
}

/* Progress bar */

.progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 200;
  height: 2px;
  width: 0%;
  background: var(--brand);
  transition: width 0.1s linear;
}

/* Reveal animations */

.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition:
    opacity var(--dur) var(--ease),
    transform var(--dur) var(--ease);
}

.reveal[data-direction="right"] {
  transform: translateX(40px);
}

.reveal[data-direction="left"] {
  transform: translateX(-40px);
}

.reveal.visible {
  opacity: 1;
  transform: translate(0);
}

/* Header */

.header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  height: var(--header);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-inline: var(--pad);
  background: rgba(250, 249, 247, 0.88);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transform: translateY(-100%);
  opacity: 0;
  transition:
    transform 0.6s var(--ease),
    opacity 0.6s var(--ease),
    border-color 0.25s,
    background 0.25s,
    box-shadow 0.25s;
}

.header.scrolled {
  border-color: var(--border);
  background: rgba(250, 249, 247, 0.96);
  box-shadow: 0 4px 24px rgba(20, 20, 20, 0.04);
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  transition: opacity 0.2s;
}

.logo:hover {
  opacity: 0.75;
}

.logo-img {
  height: 28px;
  width: 28px;
  object-fit: contain;
  flex-shrink: 0;
  transition: transform 0.4s var(--ease);
}

.logo:hover .logo-img {
  transform: rotate(-6deg) scale(1.05);
}

.logo-name {
  font-size: 1.0625rem;
  font-weight: 600;
  letter-spacing: -0.03em;
  color: var(--text);
}

.footer-brand .logo-name {
  font-size: 0.9375rem;
}

.nav {
  display: flex;
  gap: 2.25rem;
}

.nav a {
  position: relative;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: color 0.25s;
}

.nav a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 100%;
  height: 1.5px;
  background: var(--brand);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.35s var(--ease);
}

.nav a:hover,
.nav a.active {
  color: var(--brand);
}

.nav a:hover::after,
.nav a.active::after {
  transform: scaleX(1);
  transform-origin: left;
}

.menu-btn {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  width: 32px;
  height: 32px;
  cursor: pointer;
}

.menu-btn span {
  display: block;
  height: 1.5px;
  background: var(--text);
  transition: transform 0.3s var(--ease), opacity 0.3s;
}

.menu-btn[aria-expanded="true"] span:first-child {
  transform: translateY(3.75px) rotate(45deg);
}

.menu-btn[aria-expanded="true"] span:last-child {
  transform: translateY(-3.75px) rotate(-45deg);
}

.mobile-menu {
  position: fixed;
  inset: var(--header) 0 auto;
  z-index: 99;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  padding: 2rem var(--pad);
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  transform: translateY(-12px);
  opacity: 0;
  transition: transform 0.35s var(--ease), opacity 0.35s var(--ease);
}

.mobile-menu.open {
  transform: translateY(0);
  opacity: 1;
}

.mobile-menu[hidden] {
  display: none;
}

.mobile-menu:not([hidden]) {
  display: flex;
}

.mobile-menu a {
  font-size: 1.125rem;
  font-weight: 500;
  transform: translateX(-12px);
  opacity: 0;
  transition: transform 0.4s var(--ease), opacity 0.4s var(--ease), color 0.2s;
}

.mobile-menu.open a {
  transform: translateX(0);
  opacity: 1;
}

.mobile-menu.open a:nth-child(1) { transition-delay: 0.05s; }
.mobile-menu.open a:nth-child(2) { transition-delay: 0.1s; }
.mobile-menu.open a:nth-child(3) { transition-delay: 0.15s; }
.mobile-menu.open a:nth-child(4) { transition-delay: 0.2s; }

.mobile-menu a:hover {
  color: var(--brand);
}

/* Hero */

.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: calc(var(--header) + 3rem) 0 5rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
}

.hero-copy {
  max-width: 480px;
}

.label {
  display: inline-block;
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--brand);
  margin-bottom: 1.75rem;
  padding-bottom: 0.5rem;
  position: relative;
}

.label::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 1px;
  background: var(--brand);
  transition: width 0.8s var(--ease);
}

.label.visible::after {
  width: 100%;
}

.hero h1 {
  font-size: clamp(2.75rem, 6vw, 4.25rem);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.04em;
  margin-bottom: 1.75rem;
}

.translation-container {
  position: relative;
  display: inline-block;
  vertical-align: baseline;
  margin-inline: 0.15em;
  cursor: help;
}

.translation-word {
  display: inline-block;
  padding: 0.05em 0.2em;
  border-radius: 4px;
  transition: background 0.25s, transform 0.25s var(--ease);
}

.highlight-block {
  background: #fde047;
  color: var(--text);
}

.translation-container:hover .translation-word,
.translation-container:focus-within .translation-word {
  background: #facc15;
  transform: translateY(-2px);
}

.translation-tooltip {
  position: absolute;
  left: 50%;
  bottom: calc(100% + 10px);
  transform: translateX(-50%) translateY(6px);
  padding: 0.35rem 0.65rem;
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: #fff;
  background: var(--brand);
  border-radius: 4px;
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.25s, transform 0.25s var(--ease), visibility 0.25s;
}

.translation-tooltip::after {
  content: '';
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  border: 5px solid transparent;
  border-top-color: var(--brand);
}

.translation-container:hover .translation-tooltip,
.translation-container:focus-within .translation-tooltip {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.lead {
  font-size: 1.0625rem;
  color: var(--text-muted);
  line-height: 1.75;
  margin-bottom: 2.5rem;
}

.hero-visual {
  margin: 0;
}

.hero-visual img {
  width: 100%;
  height: auto;
  object-fit: contain;
  animation: float 6s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}


.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.8125rem 1.625rem;
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: #fff;
  background: var(--brand);
  border-radius: var(--radius);
  cursor: pointer;
  transition:
    background 0.25s,
    transform 0.25s var(--ease),
    box-shadow 0.25s,
    gap 0.25s var(--ease);
  box-shadow: 0 2px 8px rgba(161, 77, 83, 0.2);
  overflow: hidden;
  position: relative;
}

.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, transparent 30%, rgba(255,255,255,0.15) 50%, transparent 70%);
  transform: translateX(-100%);
  transition: transform 0.5s;
}

.btn:hover::before {
  transform: translateX(100%);
}

.btn:hover {
  background: var(--brand-dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(161, 77, 83, 0.3);
  gap: 0.75rem;
}

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

.btn-arrow {
  transition: transform 0.3s var(--ease);
}

.btn:hover .btn-arrow {
  transform: translateX(3px);
}

.btn-spinner {
  display: none;
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

.form.loading .btn-label { display: none; }
.form.loading .btn-spinner { display: block; }
.form.loading .btn { pointer-events: none; }

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Sections */

.section {
  padding: clamp(4rem, 10vw, 6rem) 0;
  position: relative;
}

.section-border::before {
  content: '';
  position: absolute;
  top: 0;
  left: var(--pad);
  right: var(--pad);
  max-width: var(--max);
  margin-inline: auto;
  height: 1px;
  background: var(--border);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 1s var(--ease);
}

.section-border.in-view::before {
  transform: scaleX(1);
}

.section-label {
  margin-bottom: 1rem;
}

.section-title + .section-desc {
  margin-top: -0.25rem;
}

.split {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: clamp(2rem, 5vw, 4rem);
}

.split-label p {
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  transition: color 0.3s, transform 0.5s var(--ease);
}

.split-label.visible p:first-child {
  color: var(--text);
}

.split-label p + p {
  margin-top: 0.35rem;
  color: var(--brand);
}

.split-body {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  max-width: 540px;
}

.split-body p {
  font-size: 1.0625rem;
  color: var(--text-muted);
  line-height: 1.8;
  padding-left: 1rem;
  border-left: 2px solid transparent;
  transition: border-color 0.4s, color 0.4s, padding-left 0.4s var(--ease);
}

.split-body p.visible {
  border-left-color: var(--brand-soft);
  padding-left: 1.25rem;
}

.split-body p:hover {
  color: var(--text);
  border-left-color: var(--brand);
}

/* List - legacy removed, using feature-grid */

.section-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 0.75rem;
}

.section-desc {
  max-width: 520px;
  font-size: 1.0625rem;
  color: var(--text-muted);
  line-height: 1.75;
  margin-bottom: 3rem;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.research-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
}

.feature-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition:
    border-color 0.35s,
    box-shadow 0.35s var(--ease),
    transform 0.35s var(--ease);
}

.feature-card:hover {
  border-color: rgba(161, 77, 83, 0.25);
  box-shadow: 0 12px 32px rgba(20, 20, 20, 0.06);
  transform: translateY(-4px);
}

.feature-img {
  margin: 0;
  aspect-ratio: 1;
  overflow: hidden;
  background: var(--bg);
}

.feature-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s var(--ease);
}

.feature-card:hover .feature-img img {
  transform: scale(1.04);
}

.feature-body {
  padding: 1.25rem 1.35rem 1.5rem;
}

.feature-body h3 {
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 0.4rem;
  transition: color 0.3s;
}

.feature-card:hover .feature-body h3 {
  color: var(--brand);
}

.feature-body p {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.65;
}

.research {
  background: var(--bg-white);
}

/* Notify */

.notify {
  border-top: 1px solid var(--border);
  background: var(--bg-white);
  overflow: hidden;
}

.notify::after {
  content: '';
  position: absolute;
  right: -10%;
  bottom: -30%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, var(--brand-soft) 0%, transparent 70%);
  pointer-events: none;
  opacity: 0;
  transition: opacity 1s var(--ease);
}

.notify.in-view::after {
  opacity: 1;
}

.notify-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: end;
  position: relative;
  z-index: 1;
}

.notify h2 {
  font-size: clamp(1.875rem, 4vw, 2.5rem);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin: 0.5rem 0 0.75rem;
}

.muted {
  color: var(--text-muted);
  font-size: 0.9375rem;
}

.form {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  padding: 1.5rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color 0.35s, box-shadow 0.35s var(--ease), transform 0.5s var(--ease);
}

.form:focus-within {
  border-color: rgba(161, 77, 83, 0.35);
  box-shadow: 0 8px 32px rgba(161, 77, 83, 0.08);
}

.form input {
  flex: 1;
  min-width: 200px;
  padding: 0.8125rem 1rem;
  font-size: 0.875rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-white);
  outline: none;
  transition: border-color 0.25s, box-shadow 0.25s, transform 0.25s var(--ease);
}

.form input:focus {
  border-color: var(--brand);
  box-shadow: 0 0 0 3px var(--brand-soft);
  transform: translateY(-1px);
}

.form .btn {
  min-width: 124px;
}

.form-msg {
  width: 100%;
  font-size: 0.8125rem;
  min-height: 1.2em;
  padding-left: 0.25rem;
  transition: opacity 0.3s, transform 0.3s var(--ease);
}

.form-msg:empty {
  opacity: 0;
}

.form-msg.ok {
  color: var(--brand);
  animation: msgIn 0.4s var(--ease);
}

.form-msg.err {
  color: #b33a3a;
  animation: msgIn 0.4s var(--ease);
}

@keyframes msgIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Footer */

.footer {
  padding: clamp(3rem, 8vw, 4.5rem) 0 2rem;
  border-top: 1px solid var(--border);
  background: var(--bg);
}

.footer-top {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  padding-bottom: 2.5rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 1.5rem;
}

.footer-brand-block {
  max-width: 280px;
}

.footer-tagline {
  margin-top: 0.75rem;
  font-size: 0.9375rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.footer-links {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  justify-items: end;
}

.footer-col {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  min-width: 140px;
}

.footer-heading {
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text);
  margin-bottom: 0.35rem;
}

.footer-col a,
.footer-col span {
  font-size: 0.875rem;
  color: var(--text-muted);
  transition: color 0.2s;
}

.footer-col a:hover {
  color: var(--brand);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.footer-bottom p {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.footer-brand .logo-img {
  height: 22px;
  width: 22px;
}

/* Responsive */

@media (max-width: 900px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }

  .hero-visual {
    order: -1;
    max-width: 520px;
  }

  .hero-copy {
    max-width: none;
  }

  .feature-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .nav { display: none; }
  .menu-btn { display: flex; }

  .split {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .split-body p {
    padding-left: 0;
    border-left: none;
  }

  .split-body p.visible {
    padding-left: 0;
  }

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

  .form {
    flex-direction: column;
    padding: 1.25rem;
  }

  .form .btn {
    width: 100%;
  }

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

  .footer-links {
    justify-items: start;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }

  .feature-grid,
  .research-grid {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .header {
    transform: none;
    opacity: 1;
  }

  .hero-visual img,
  .btn::before {
    animation: none;
  }

  *, *::before, *::after {
    transition-duration: 0.01ms !important;
  }

  .btn:hover { transform: none; }
  .feature-card:hover { transform: none; }
}