@font-face {
  font-family: "Mona Sans";
  src: url("/assets/fonts/MonaSans.woff2") format("woff2 supports variations"),
       url("/assets/fonts/MonaSans.woff2") format("woff2");
  font-weight: 200 900;
  font-style: normal oblique 0deg 20deg;
  font-display: swap;
}

@layer tokens, reset, layout, components;

/* ─── Tokens ─────────────────────────────────────────────────────────────── */

@layer tokens {
  :root {
    color-scheme: light dark;

    --brand-base:  #0b2e33;
    --brand-night: #061a1e;
    --ice:         #b8e3e9;
    --teal-mid:    #4f7c82;
    --mist:        #93b1b5;
    --ink:         #102326;
    --muted:       #53676b;
    --line:        #d8e6e9;
    --paper:       #ffffff;
    --paper-soft:  #f4f9fa;
    --link:        #386c72;
    --link-hover:  #0b2e33;
    --focus:       #4f7c82;
    --radius:      8px;
    --shadow:      0 20px 50px rgb(11 46 51 / 14%);

    --space-xs:  7px;
    --space-sm:  14px;
    --space-md:  22px;
    --space-lg:  32px;
    --space-xl:  48px;
    --space-2xl: 72px;

    font-family: "Mona Sans", ui-sans-serif, system-ui, -apple-system,
      BlinkMacSystemFont, "SF Pro Text", "Segoe UI", sans-serif;
  }

  @media (prefers-color-scheme: dark) {
    :root {
      --ink:        #eef8f9;
      --muted:      #a6b9bd;
      --line:       #27464b;
      --paper:      #061a1e;
      --paper-soft: #0b2e33;
      --link:       #b8e3e9;
      --link-hover: #93b1b5;
      --focus:      #b8e3e9;
      --shadow:     0 20px 50px rgb(0 0 0 / 34%);
    }
  }
}

/* ─── Reset ──────────────────────────────────────────────────────────────── */

@layer reset {
  * {
    box-sizing: border-box;
  }

  html {
    background: var(--paper);
    color: var(--ink);
    scroll-behavior: smooth;
  }

  body {
    margin: 0;
    font-size: 17px;
    line-height: 1.58;
    text-rendering: optimizeLegibility;
  }

  a {
    color: var(--link);
    text-decoration-thickness: 0.08em;
    text-underline-offset: 0.2em;
  }

  a:hover {
    color: var(--link-hover);
  }

  a:focus-visible,
  button:focus-visible {
    outline: 3px solid var(--focus);
    outline-offset: 3px;
  }

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

/* ─── Layout ─────────────────────────────────────────────────────────────── */

@layer layout {
  .site-header {
    border-bottom: 1px solid var(--line);
    background: rgb(255 255 255 / 88%);
    backdrop-filter: saturate(180%) blur(18px);
    position: sticky;
    top: 0;
    z-index: 10;
  }

  .nav {
    align-items: center;
    display: flex;
    gap: 24px;
    justify-content: space-between;
    margin: 0 auto;
    max-width: 1120px;
    padding: var(--space-sm) 24px;
  }

  .brand {
    align-items: center;
    color: var(--ink);
    display: inline-flex;
    font-size: 0.98rem;
    font-weight: 700;
    gap: 10px;
    letter-spacing: 0;
    text-decoration: none;
  }

  .brand img {
    border-radius: 8px;
    height: 34px;
    width: 34px;
  }

  .nav-links {
    align-items: center;
    display: flex;
    flex-wrap: wrap;
    gap: 6px 18px;
    justify-content: flex-end;
  }

  .nav-links a {
    color: var(--muted);
    font-size: 0.92rem;
    font-weight: 600;
    text-decoration: none;
  }

  .nav-links a[aria-current="page"] {
    color: var(--ink);
  }

  .hero {
    background:
      radial-gradient(circle at 84% 10%, rgb(184 227 233 / 46%), transparent 34%),
      radial-gradient(circle at 16% 86%, rgb(147 177 181 / 18%), transparent 30%),
      linear-gradient(180deg, #f6fbfc 0%, #ffffff 72%);
    overflow: hidden;
  }

  .hero-inner {
    display: grid;
    gap: var(--space-xl);
    grid-template-columns: minmax(0, 1.06fr) minmax(280px, 0.94fr);
    margin: 0 auto;
    max-width: 1120px;
    min-height: 680px;
    padding: 86px 24px var(--space-2xl);
  }

  .hero h1,
  .page-hero h1 {
    color: var(--brand-base);
    font-size: clamp(2.75rem, 6vw, 5.4rem);
    font-variation-settings: "wdth" 110;
    letter-spacing: 0;
    line-height: 0.98;
    margin: 0;
  }

  .hero p {
    color: var(--muted);
    font-size: clamp(1.08rem, 2vw, 1.28rem);
    margin: 28px 0 0;
    max-width: 620px;
  }

  .actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 34px;
  }

  .section,
  .page {
    margin: 0 auto;
    max-width: 1120px;
    padding: 76px 24px;
  }

  .section h2,
  .page h2 {
    color: var(--brand-base);
    font-size: clamp(2rem, 4vw, 3.2rem);
    letter-spacing: 0;
    line-height: 1.08;
    margin: 0 0 18px;
  }

  .section-intro,
  .page-intro {
    color: var(--muted);
    font-size: 1.13rem;
    margin: 0;
    max-width: 760px;
  }

  .band {
    background: var(--paper-soft);
    border-block: 1px solid var(--line);
  }

  .page-hero {
    background:
      radial-gradient(circle at 88% 0%, rgb(184 227 233 / 34%), transparent 30%),
      linear-gradient(180deg, #f6fbfc 0%, #ffffff 100%);
    border-bottom: 1px solid var(--line);
  }

  .page-hero .page {
    padding-bottom: 58px;
    padding-top: var(--space-2xl);
  }

  .site-footer {
    border-top: 1px solid var(--line);
    color: var(--muted);
    margin: 0 auto;
    max-width: 1120px;
    padding: var(--space-lg) 24px 46px;
  }

  .footer-groups {
    display: grid;
    gap: var(--space-md);
    grid-template-columns: repeat(4, minmax(0, 1fr));
    margin-bottom: var(--space-md);
  }
}

/* ─── Components ─────────────────────────────────────────────────────────── */

@layer components {
  .button {
    align-items: center;
    border: 1px solid transparent;
    border-radius: var(--radius);
    display: inline-flex;
    font-size: 0.98rem;
    font-weight: 700;
    justify-content: center;
    min-height: 44px;
    padding: 11px 18px;
    text-decoration: none;
  }

  .button.primary {
    background: var(--brand-base);
    color: #ffffff;
  }

  .button.secondary {
    background: #ffffff;
    border-color: var(--line);
    color: var(--brand-base);
  }

  .visual {
    align-self: center;
    min-height: 430px;
    position: relative;
  }

  .icon-plate {
    background: #ffffff;
    border: 1px solid rgb(216 230 233 / 82%);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    left: -70px;
    padding: 20px;
    position: absolute;
    top: 0;
    width: min(190px, 48vw);
    z-index: 2;
  }

  .icon-plate img {
    border-radius: 18%;
    display: block;
    height: auto;
    width: 100%;
  }

  .device {
    background: linear-gradient(145deg, var(--brand-base), var(--brand-night));
    border: 1px solid rgb(255 255 255 / 22%);
    border-radius: var(--radius);
    bottom: 0;
    box-shadow: var(--shadow);
    color: #ffffff;
    overflow: hidden;
    position: absolute;
    right: 0;
    width: min(360px, 78vw);
    z-index: 1;
  }

  .device-header {
    align-items: center;
    border-bottom: 1px solid rgb(255 255 255 / 14%);
    display: flex;
    gap: 8px;
    padding: var(--space-sm);
  }

  .dot {
    background: rgb(255 255 255 / 36%);
    border-radius: 999px;
    display: block;
    height: 10px;
    width: 10px;
  }

  .screen {
    padding: 82px var(--space-md) var(--space-md);
  }

  .hero .screen-title {
    color: #ffffff;
    font-size: 1.16rem;
    font-weight: 800;
    margin: 0 0 18px;
  }

  .library-row {
    align-items: center;
    border-top: 1px solid rgb(255 255 255 / 12%);
    display: flex;
    justify-content: space-between;
    padding: var(--space-sm) 0;
  }

  .library-row span {
    color: rgb(255 255 255 / 70%);
    font-size: 0.86rem;
  }

  .feature-grid {
    display: grid;
    gap: 18px;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    margin-top: 34px;
  }

  .feature {
    border-top: 1px solid var(--line);
    padding-top: 20px;
  }

  .feature h3,
  .callout h3,
  .content-block h3,
  .faq h3 {
    color: var(--brand-base);
    font-size: 1.14rem;
    line-height: 1.2;
    margin: 0 0 8px;
  }

  .feature p,
  .callout p,
  .content-block p,
  .faq p,
  .content-block li {
    color: var(--muted);
    margin: 0;
  }

  .callout {
    background: #ffffff;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 24px;
  }

  .callout-row {
    display: grid;
    gap: 18px;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    margin-top: 34px;
  }

  .content-grid {
    display: grid;
    gap: 28px;
    grid-template-columns: minmax(0, 0.72fr) minmax(260px, 0.28fr);
  }

  .content-block {
    border-top: 1px solid var(--line);
    padding-top: 24px;
  }

  .content-block:first-child {
    border-top: 0;
    padding-top: 0;
  }

  .content-block + .content-block {
    margin-top: 34px;
  }

  .content-block p + p,
  .content-block p + ul,
  .content-block ul + p {
    margin-top: var(--space-sm);
  }

  .content-block ul {
    margin: 12px 0 0;
    padding-left: 1.2rem;
  }

  .side-panel {
    align-self: start;
    background: var(--paper-soft);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: var(--space-md);
  }

  .side-panel h2,
  .side-panel h3 {
    font-size: 1.05rem;
    margin: 0 0 10px;
  }

  .side-panel p,
  .side-panel li {
    color: var(--muted);
    font-size: 0.95rem;
  }

  .side-panel ul {
    margin: 0;
    padding-left: 1.1rem;
  }

  .faq {
    border-top: 1px solid var(--line);
    padding: var(--space-md) 0;
  }

  .footer-group {
    align-content: start;
    display: grid;
    gap: var(--space-xs);
  }

  .footer-group h2 {
    color: var(--brand-base);
    font-size: 0.78rem;
    letter-spacing: 0.06em;
    line-height: 1.2;
    margin: 0 0 2px;
    text-transform: uppercase;
  }

  .footer-group a {
    color: var(--muted);
    font-size: 0.94rem;
    font-weight: 650;
    text-decoration: none;
  }

  .site-footer p {
    font-size: 0.92rem;
    margin: 0;
  }
}

/* ─── Responsive ─────────────────────────────────────────────────────────── */

@media (max-width: 820px) {
  .nav {
    align-items: flex-start;
    flex-direction: column;
  }

  .nav-links {
    justify-content: flex-start;
  }

  .hero-inner,
  .content-grid,
  .callout-row {
    grid-template-columns: 1fr;
  }

  .hero-inner {
    gap: 28px;
    min-height: auto;
    padding: 56px 24px 60px;
  }

  .visual {
    display: grid;
    justify-items: center;
    margin-top: 16px;
    min-height: 0;
    padding-top: var(--space-xl);
  }

  .icon-plate {
    left: max(12px, calc(50% - 178px));
    padding: 10px;
    top: 0;
    width: 104px;
  }

  .device {
    bottom: auto;
    max-width: 100%;
    min-width: 0;
    position: relative;
    right: auto;
    width: min(100%, 340px);
  }

  .screen {
    padding: 70px 18px 18px;
  }

  .screen-title {
    font-size: 1rem;
  }

  .library-row {
    align-items: flex-start;
    gap: 16px;
  }

  .library-row span {
    text-align: right;
  }

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

  .footer-groups {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 821px) and (max-width: 1100px) {
  .hero-inner {
    gap: var(--space-lg);
    grid-template-columns: minmax(0, 1fr) minmax(300px, 0.82fr);
  }

  .icon-plate {
    left: 0;
    top: -72px;
    width: 150px;
  }

  .device {
    width: min(340px, 100%);
  }

  .screen {
    padding-top: 82px;
  }
}

@media (max-width: 520px) {
  body {
    font-size: 16px;
  }

  .nav {
    gap: 18px;
    padding: 18px 20px;
  }

  .brand {
    font-size: 1rem;
  }

  .brand img {
    height: 42px;
    width: 42px;
  }

  .nav-links {
    display: grid;
    gap: 8px 18px;
    grid-template-columns: repeat(2, minmax(0, max-content));
  }

  .nav-links a {
    font-size: 0.98rem;
  }

  .hero-inner {
    padding: var(--space-xl) 20px 56px;
  }

  .hero h1,
  .page-hero h1 {
    font-size: clamp(2.6rem, 13vw, 4rem);
    line-height: 1.04;
  }

  .hero p {
    font-size: 1.1rem;
    line-height: 1.62;
    margin-top: 26px;
  }

  .actions {
    align-items: stretch;
    display: grid;
    grid-template-columns: 1fr;
    margin-top: 28px;
  }

  .button {
    width: 100%;
  }

  .visual {
    margin-top: 28px;
    padding-top: 44px;
  }

  .icon-plate {
    left: 16px;
  }

  .device {
    width: 100%;
  }

  .section,
  .page {
    padding: 56px 20px;
  }

  .page-hero .page {
    padding-bottom: var(--space-xl);
    padding-top: var(--space-xl);
  }

  .content-block + .content-block {
    margin-top: 28px;
  }

  .side-panel {
    padding: 18px;
  }

  .footer-groups {
    grid-template-columns: 1fr;
  }
}

/* ─── Dark mode component overrides ─────────────────────────────────────── */

@media (prefers-color-scheme: dark) {
  .site-header {
    background: rgb(6 26 30 / 88%);
  }

  .hero,
  .page-hero {
    background:
      radial-gradient(circle at 84% 10%, rgb(184 227 233 / 16%), transparent 34%),
      radial-gradient(circle at 16% 86%, rgb(79 124 130 / 16%), transparent 30%),
      linear-gradient(180deg, #0b2e33 0%, #061a1e 72%);
  }

  .hero h1,
  .page-hero h1,
  .section h2,
  .page h2,
  .feature h3,
  .callout h3,
  .content-block h3,
  .faq h3,
  .brand {
    color: #ffffff;
  }

  .footer-group h2 {
    color: #ffffff;
  }

  .button.secondary,
  .callout,
  .icon-plate {
    background: #0b2e33;
  }

  .button.secondary {
    border-color: #4f7c82;
    color: #b8e3e9;
  }
}