@font-face {
  font-family: "IBM Plex Sans";
  font-style: normal;
  font-weight: 400 700;
  font-display: swap;
  src: url(../fonts/ibm-plex-sans-latin.woff2) format("woff2");
  unicode-range:
    U+0000-00FF,
    U+0131,
    U+0152-0153,
    U+02BB-02BC,
    U+02C6,
    U+02DA,
    U+02DC,
    U+0304,
    U+0308,
    U+0329,
    U+2000-206F,
    U+20AC,
    U+2122,
    U+2191,
    U+2193,
    U+2212,
    U+2215,
    U+FEFF,
    U+FFFD;
}

@font-face {
  font-family: "IBM Plex Sans";
  font-style: normal;
  font-weight: 400 700;
  font-display: swap;
  src: url(../fonts/ibm-plex-sans-latin-ext.woff2) format("woff2");
  unicode-range:
    U+0100-02BA,
    U+02BD-02C5,
    U+02C7-02CC,
    U+02CE-02D7,
    U+02DD-02FF,
    U+0304,
    U+0308,
    U+0329,
    U+1D00-1DBF,
    U+1E00-1E9F,
    U+1EF2-1EFF,
    U+2020,
    U+20A0-20AB,
    U+20AD-20C0,
    U+2113,
    U+2C60-2C7F,
    U+A720-A7FF;
}

:root {
  --color-bg: #fafaf5;
  --color-indigo: #1b1464;
  --color-gold: #c2760a;
  --color-text: #1a1a2e;
  --color-body: #3d3d3d;
  --color-muted: #8c8c8c;
  --color-subtle: #5c5c5c;
  --color-border: #e8e4de;
  --color-cream: #f4f1ec;

  --font-sans:
    "IBM Plex Sans",
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    Roboto,
    sans-serif;

  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.85rem);
  --text-sm: clamp(0.8rem, 0.76rem + 0.2vw, 0.9rem);
  --text-base: clamp(0.95rem, 0.9rem + 0.25vw, 1.1rem);
  --text-lg: clamp(1.05rem, 1rem + 0.3vw, 1.2rem);
  --text-xl: clamp(1.4rem, 1.2rem + 0.8vw, 1.8rem);
  --text-2xl: clamp(1.8rem, 1.4rem + 1.5vw, 2.6rem);
  --text-3xl: clamp(2.2rem, 1.7rem + 2vw, 3.4rem);

  --leading-tight: 1.15;
  --leading-normal: 1.6;
  --leading-relaxed: 1.7;

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 2.5rem;
  --space-8: 3rem;
  --space-9: 4rem;
  --space-10: 5rem;
  --space-11: 6.5rem;
  --space-12: 8rem;

  --container: 900px;
  --container-narrow: 640px;
  --radius: 6px;
}

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

* {
  margin: 0;
  padding: 0;
}

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

p, h1, h2, h3 {
  overflow-wrap: break-word;
}

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

ul {
  list-style: none;
}

::selection {
  background: rgba(27, 20, 100, 0.12);
  color: var(--color-text);
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  min-height: 100svh;
  font-family: var(--font-sans);
  font-size: var(--text-base);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: var(--leading-normal);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

.skip-link:focus-visible {
  position: fixed;
  top: var(--space-4);
  left: var(--space-4);
  z-index: 100;
  padding: var(--space-2) var(--space-4);
  background: var(--color-indigo);
  color: var(--color-bg);
  border-radius: var(--radius);
  clip: auto;
  width: auto;
  height: auto;
  overflow: visible;
  white-space: normal;
}

.container {
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--space-5);
}

nav {
  padding: var(--space-4) 0;
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  background: var(--color-bg);
  z-index: 10;
}

nav .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: var(--text-xl);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-indigo);
  text-decoration: none;
  min-height: 44px;
  display: inline-block;
  line-height: 44px;
}

.logo:focus-visible {
  outline: 2px solid var(--color-gold);
  outline-offset: 2px;
}

.logo span {
  display: inline-block;
  width: 10px;
  height: 10px;
  background: var(--color-gold);
  border-radius: 50%;
  margin-left: 2px;
  vertical-align: baseline;
  position: relative;
  top: -1px;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: var(--space-5);
}

.lang-nav {
  display: flex;
  gap: var(--space-3);
}

.lang-link {
  font-size: var(--text-xs);
  font-weight: 400;
  color: var(--color-muted);
  text-decoration: none;
  letter-spacing: 0.05em;
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  font-family: inherit;
}

.lang-sep {
  color: var(--color-muted);
}

.lang-link--active {
  color: var(--color-text);
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.lang-link:hover {
  color: var(--color-text);
}

.lang-link:focus-visible {
  outline: 2px solid var(--color-gold);
  outline-offset: 2px;
}

.nav-cta {
  padding: var(--space-2) var(--space-5);
  background: var(--color-indigo);
  color: var(--color-bg);
  text-decoration: none;
  font-weight: 600;
  font-size: var(--text-sm);
  border-radius: var(--radius);
  transition: background 0.2s;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}

.nav-cta:hover {
  background: #3f51b5;
}

.nav-cta:focus-visible {
  outline: 2px solid var(--color-gold);
  outline-offset: 2px;
}

.hero {
  padding: var(--space-12) 0 var(--space-11);
  text-align: center;
}

.hero h1 {
  font-size: var(--text-3xl);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: var(--leading-tight);
  color: var(--color-indigo);
  margin-bottom: var(--space-5);
  max-width: 780px;
  margin-inline: auto;
  text-wrap: balance;
}

.hero h1 em {
  font-style: normal;
  color: var(--color-gold);
}

.hero .subtitle {
  font-size: var(--text-lg);
  color: var(--color-body);
  max-width: 600px;
  margin: 0 auto var(--space-7);
  line-height: var(--leading-relaxed);
}

.hero__diagram {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  margin-top: var(--space-8);
}

.hero__diagram-box {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-bg);
}

.hero__diagram-label {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-indigo);
  white-space: nowrap;
}

.hero__diagram-arrow {
  color: var(--color-muted);
  flex-shrink: 0;
}

.solution {
  padding: var(--space-9) 0;
  background: var(--color-cream);
  border-top: 1px solid var(--color-border);
}

.solution .container {
  max-width: var(--container-narrow);
}

.section-label {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-gold);
  font-weight: 700;
  margin-bottom: var(--space-4);
}

li {
  font-size: var(--text-base);
  color: var(--color-body);
  line-height: var(--leading-relaxed);
  padding: var(--space-4) var(--space-3);
  border-bottom: 1px solid var(--color-border);
  transition: background 0.15s, padding-left 0.15s;
  border-radius: var(--radius);
}

li:first-child {
  border-top: 1px solid var(--color-border);
}

li:hover {
  background: rgba(27, 20, 100, 0.03);
  padding-left: var(--space-5);
}

.product {
  padding: 0 0 var(--space-9);
}

.product .container {
  max-width: var(--container-narrow);
}

.product-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: var(--space-6) var(--space-6) var(--space-5);
  background: var(--color-bg);
}

.product .subtitle {
  font-size: var(--text-base);
  color: var(--color-body);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-5);
}

.product-link {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-indigo);
  text-decoration: none;
  transition: color 0.2s;
}

.product-link:hover {
  color: var(--color-gold);
}

.product-link:focus-visible {
  outline: 2px solid var(--color-gold);
  outline-offset: 2px;
}

.product-cta {
  margin-top: var(--space-5);
  padding-top: var(--space-5);
  border-top: 1px solid var(--color-border);
  font-size: var(--text-sm);
  color: var(--color-body);
}

.product-cta a {
  font-weight: 600;
  color: var(--color-indigo);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.product-cta a:hover {
  color: var(--color-gold);
}

.product-cta a:focus-visible {
  outline: 2px solid var(--color-gold);
  outline-offset: 2px;
}

footer {
  padding: var(--space-9) 0 var(--space-7);
  border-top: 1px solid var(--color-border);
}

footer .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-left {
  font-size: var(--text-xs);
  color: var(--color-muted);
}

.footer-meta {
  font-size: var(--text-xs);
  color: var(--color-muted);
  margin-top: var(--space-1);
}

.footer-links {
  display: flex;
  gap: var(--space-5);
}

.footer-links a {
  font-size: var(--text-sm);
  color: var(--color-subtle);
  text-decoration: none;
}

.footer-links a:hover {
  color: var(--color-indigo);
}

.footer-links a:focus-visible {
  outline: 2px solid var(--color-gold);
  outline-offset: 2px;
}

@media (max-width: 48em) {
  .hero {
    padding: var(--space-10) 0 var(--space-9);
  }
  .solution .container,
  .product .container {
    max-width: none;
  }
  footer {
    padding: var(--space-7) 0 var(--space-5);
  }
  footer .container {
    flex-direction: column;
    gap: var(--space-3);
    text-align: center;
  }
}

@media (max-width: 30em) {
  .container {
    padding-inline: var(--space-4);
  }
  nav {
    padding: var(--space-3) 0;
  }
  .logo span {
    width: 8px;
    height: 8px;
  }
  .nav-cta {
    padding: var(--space-2) var(--space-4);
  }
  .hero {
    padding: var(--space-9) 0 var(--space-7);
  }
  .footer-links {
    gap: var(--space-3);
  }
}