:root {
      color-scheme: light dark;
      --forest: #123d2a;
      --forest-deep: #0c2b1d;
      --moss: #2f704a;
      --gold: #d7a928;
      --gold-soft: #f5e6b4;
      --paper: #fbf8ef;
      --surface: #fffdf7;
      --ink: #1d2b24;
      --muted: #5d6b60;
      --line: #ded8c4;
      --focus: #f2bf2f;
      --radius: 14px;
    }

    @media (prefers-color-scheme: dark) {
      :root {
        --paper: #101914;
        --surface: #18251c;
        --ink: #f4edda;
        --muted: #c1cbbd;
        --line: #3a4b3b;
        --gold-soft: #3a321b;
      }
    }

    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; scroll-padding-top: 5.5rem; }
    body {
      margin: 0;
      background: var(--paper);
      color: var(--ink);
      font: 1.05rem/1.6 "Nunito Sans", system-ui, sans-serif;
    }
    img { display: block; max-width: 100%; }
    a { color: inherit; }
    .sr-only {
      position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
      overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0;
    }
    :focus-visible { outline: 3px solid var(--focus); outline-offset: 3px; }
    .wrap { width: min(1120px, calc(100% - 2.5rem)); margin-inline: auto; }
    .skip-link {
      position: absolute; left: 1rem; top: -4rem; z-index: 3;
      padding: .6rem .9rem; background: var(--gold); color: var(--forest-deep);
      border-radius: 0 0 8px 8px; font-weight: 700;
    }
    .skip-link:focus { top: 0; }
    .topbar {
      position: sticky; top: 0; z-index: 2;
      background: color-mix(in srgb, var(--forest) 96%, transparent);
      color: #fff8df; border-bottom: 3px solid var(--gold);
    }
    .topbar .wrap {
      min-height: 72px; display: flex; align-items: center;
      justify-content: space-between; gap: 1rem;
    }
    .brand {
      display: inline-flex; align-items: center; gap: .7rem;
      color: #fff8df; text-decoration: none;
      font-size: 1.02rem; line-height: 1.15;
    }
    .brand img { width: 48px; height: 48px; object-fit: cover; border-radius: 8px; }
    .menu-toggle { display: none; }
    nav { display: flex; align-items: center; gap: .25rem; }
    nav a { padding: .55rem .75rem; border-radius: 8px; color: #fff8df; text-decoration: none; font-weight: 600; }
    nav a:hover { background: var(--gold); color: var(--forest-deep); }
    .hero {
      overflow: hidden; color: #fff8df;
      background:
        radial-gradient(circle at 84% 12%, rgba(215, 169, 40, .24), transparent 28rem),
        var(--forest);
    }
    .hero .wrap {
      min-height: min(640px, calc(100svh - 72px));
      display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(280px, .9fr);
      align-items: center; gap: 4rem; padding-block: 4rem;
    }
    .assamese { color: var(--gold); font-size: 1.45rem; line-height: 1.35; margin: 0 0 .75rem; font-weight: 700; }
    h1, h2, h3 { font-weight: 700; line-height: 1.2; }
    h1 { max-width: 12ch; margin: 0 0 1.1rem; font-size: clamp(2.7rem, 6vw, 5rem); }
    .hero-copy { max-width: 35rem; margin: 0 0 1.7rem; color: #f0e6c6; font-size: 1.15rem; }
    .actions { display: flex; flex-wrap: wrap; align-items: center; gap: .75rem; }
    .button {
      display: inline-flex; align-items: center; justify-content: center;
      min-height: 48px; padding: .7rem 1.15rem; border: 2px solid var(--gold);
      border-radius: 999px; background: var(--gold); color: var(--forest-deep);
      text-decoration: none; font: inherit; font-weight: 700; cursor: pointer;
      transition: transform .2s ease, background-color .2s ease;
    }
    .button:hover { transform: translateY(-2px); background: #f2cf60; }
    .button.secondary { background: transparent; color: #fff8df; }
    .hero-art { position: relative; justify-self: center; max-width: 430px; }
    .hero-art img {
      width: min(100%, 400px); aspect-ratio: 1; object-fit: contain;
      border-radius: 16px;
    }
    section { padding-block: 5.5rem; }
    .section-heading { max-width: 720px; margin-bottom: 2rem; }
    h2 { margin: 0 0 .7rem; color: var(--moss); font-size: clamp(2rem, 4vw, 3rem); }
    .section-heading p { max-width: 65ch; margin: 0; color: var(--muted); }
    .gold-rule { width: 5rem; height: 4px; margin: 1rem 0 1.25rem; background: var(--gold); border-radius: 999px; }
    .about-grid { display: grid; grid-template-columns: 1.2fr .8fr; gap: 1.25rem; align-items: stretch; }
    .about-card { padding: 1.75rem; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
    .about-card.feature { background: var(--forest); color: #fff8df; }
    .about-card h3 { margin: 0 0 .5rem; font-size: 1.65rem; color: var(--gold); }
    .about-card p { margin: 0; color: var(--muted); }
    .about-card.feature p { color: #f0e6c6; }
    .tinted { background: var(--gold-soft); }
    .objective-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: .85rem; }
    .objective {
      padding: 1.15rem; border: 1px solid var(--line);
      border-radius: var(--radius); background: var(--surface);
    }
    .objective-icon {
      display: grid; place-items: center; width: 2rem; height: 2rem;
      margin-bottom: .8rem; border-radius: 50%; background: var(--gold-soft);
      color: var(--moss); font-size: 1.25rem; line-height: 1; font-weight: 700;
    }
    .objective strong { display: block; margin-bottom: .35rem; color: var(--moss); }
    .objective p { margin: 0; color: var(--muted); font-size: .94rem; line-height: 1.45; }
    .principles { display: grid; grid-template-columns: .8fr 1.2fr; gap: 3rem; align-items: start; }
    .principle-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0; border-top: 1px solid var(--line); }
    .principle-list div { padding: 1rem .25rem; border-bottom: 1px solid var(--line); font-weight: 600; }
    .join-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 3rem; align-items: start; }
    .contact-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
    .contact-card {
      display: grid; gap: .35rem; padding: 1.35rem; border: 1px solid var(--line);
      border-radius: var(--radius); background: var(--surface); color: var(--ink);
      text-decoration: none;
    }
    .contact-card:hover { border-color: var(--gold); }
    .contact-card strong { color: var(--moss); }
    .contact-card span { color: var(--muted); }
    form { display: grid; gap: 1rem; padding: 1.5rem; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
    label { display: grid; gap: .35rem; font-weight: 600; }
    input, select {
      width: 100%; padding: .7rem .8rem; border: 2px solid var(--line); border-radius: 8px;
      background: var(--paper); color: var(--ink); font: inherit;
    }
    input:focus-visible, select:focus-visible { outline: 3px solid var(--focus); outline-offset: 1px; }
    .form-note { margin: 0; color: var(--muted); font-size: .9rem; }
    .success { display: none; padding: 1rem; border-left: 4px solid var(--moss); background: var(--surface); }
    .success.is-visible { display: block; }
    footer { padding-block: 2.5rem; background: var(--forest-deep); color: #f0e6c6; text-align: center; }
    footer .assamese { margin-bottom: .2rem; }
    footer p { margin: .25rem 0 0; }
    @media (max-width: 850px) {
      .hero .wrap, .about-grid, .principles, .join-grid { grid-template-columns: 1fr; gap: 2rem; }
      .hero .wrap { min-height: auto; padding-block: 3.5rem; }
      .hero-art { order: -1; max-width: 300px; }
      .objective-grid { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 620px) {
      body { font-size: 1rem; line-height: 1.65; }
      .wrap { width: min(100% - 2rem, 1120px); }
      .topbar .wrap { min-height: 64px; padding-block: .65rem; align-items: center; }
      .brand { max-width: 15rem; font-size: .88rem; }
      .brand img { width: 40px; height: 40px; }
      .menu-toggle {
        display: inline-grid; place-items: center; width: 42px; height: 42px;
        padding: .5rem; border: 0; background: transparent; color: #fff8df;
        cursor: pointer;
      }
      .menu-toggle:hover, .menu-toggle:focus-visible { color: var(--gold); }
      .menu-icon { display: grid; gap: 5px; width: 24px; }
      .menu-icon span {
        display: block; height: 2px; border-radius: 2px; background: currentColor;
        transform-origin: center; transition: transform .22s ease, opacity .18s ease;
      }
      .menu-toggle[aria-expanded="true"] .menu-icon span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
      .menu-toggle[aria-expanded="true"] .menu-icon span:nth-child(2) { opacity: 0; transform: scaleX(0); }
      .menu-toggle[aria-expanded="true"] .menu-icon span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
      nav {
        display: none; position: absolute; top: 100%; left: 0; right: 0;
        padding: .65rem 1rem .85rem; border-top: 1px solid rgba(255, 248, 223, .18);
        background: var(--forest-deep); box-shadow: 0 .75rem 1.5rem rgba(0, 0, 0, .18);
      }
      nav.is-open { display: grid; gap: .25rem; }
      nav a { padding: .75rem .8rem; font-size: 1rem; }
      nav a:hover { background: rgba(215, 169, 40, .18); color: #fff8df; }
      section { padding-block: 3.5rem; }
      .hero .wrap { padding-block: 2.75rem 3.5rem; gap: 2rem; }
      .hero-art { width: 100%; max-width: 280px; }
      .hero-art img { width: 100%; height: auto; object-fit: contain; }
      .hero .wrap > div:first-child { text-align: center; }
      .assamese { font-size: 1.15rem; }
      h1 { max-width: 14ch; margin-bottom: .9rem; font-size: clamp(2.35rem, 12vw, 3.5rem); line-height: 1.12; }
      h2 { font-size: clamp(1.9rem, 9vw, 2.6rem); }
      h3 { font-size: 1.35rem; }
      .hero-copy { font-size: 1.05rem; line-height: 1.55; }
      .section-heading { margin-bottom: 1.5rem; }
      .section-heading p { font-size: 1rem; }
      .about-card { padding: 1.35rem; }
      .objective-grid, .principle-list { grid-template-columns: 1fr; }
      .objective { padding: 1rem; }
      .objective p { font-size: .98rem; }
      .principles, .join-grid { gap: 1.75rem; }
      .contact-grid { grid-template-columns: 1fr; }
      form { padding: 1.2rem; }
      .actions { justify-content: center; }
      .actions, .button { width: 100%; }
    }
    @media (prefers-reduced-motion: reduce) {
      html { scroll-behavior: auto; }
      .button, .menu-icon span { transition: none; }
      .button:hover { transform: none; }
    }