:root {
      --bg: #0f1219;
      --surface: #181c27;
      --text: #e8eaef;
      --muted: #8b92a8;
      --accent: #6c9eff;
      --accent-dim: #4a7ae0;
      --radius: 14px;
      --max: 960px;
    }

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

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: "DM Sans", system-ui, sans-serif;
      background: var(--bg);
      color: var(--text);
      line-height: 1.6;
      min-height: 100vh;
    }

    .noise {
      pointer-events: none;
      position: fixed;
      inset: 0;
      opacity: 0.035;
      background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
      z-index: 0;
    }

    .glow {
      position: fixed;
      width: 60vw;
      height: 60vw;
      max-width: 720px;
      max-height: 720px;
      border-radius: 50%;
      background: radial-gradient(circle, rgba(108, 158, 255, 0.12) 0%, transparent 70%);
      top: -20%;
      right: -15%;
      pointer-events: none;
      z-index: 0;
    }

    header {
      position: sticky;
      top: 0;
      z-index: 10;
      border-bottom: 1px solid rgba(255, 255, 255, 0.06);
      background: rgba(15, 18, 25, 0.75);
      backdrop-filter: blur(12px);
    }

    .nav-inner {
      max-width: var(--max);
      margin: 0 auto;
      padding: 1rem 1.5rem;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 1rem;
    }

    .logo {
      font-weight: 700;
      font-size: 1.1rem;
      letter-spacing: -0.02em;
      color: var(--text);
      text-decoration: none;
    }

    nav ul {
      list-style: none;
      display: flex;
      gap: 1.5rem;
    }

    nav a {
      color: var(--muted);
      text-decoration: none;
      font-size: 0.95rem;
      transition: color 0.2s;
    }

    nav a:hover {
      color: var(--text);
    }

    nav a[aria-current="page"] {
      color: var(--text);
      font-weight: 600;
    }

    main {
      position: relative;
      z-index: 1;
      max-width: var(--max);
      margin: 0 auto;
      padding: 0 1.5rem 4rem;
    }

    .hero {
      padding: 4.5rem 0 3.5rem;
    }

    .hero h1 {
      font-size: clamp(2.25rem, 5vw, 3.25rem);
      font-weight: 700;
      letter-spacing: -0.03em;
      line-height: 1.15;
      margin-bottom: 1rem;
    }

    .hero p.lead {
      font-size: 1.15rem;
      color: var(--muted);
      max-width: 32rem;
      margin-bottom: 2rem;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      gap: 0.5rem;
      padding: 0.75rem 1.35rem;
      border-radius: 10px;
      font-weight: 600;
      font-size: 0.95rem;
      text-decoration: none;
      transition: transform 0.15s, background 0.2s, box-shadow 0.2s;
    }

    .btn-primary {
      background: linear-gradient(135deg, var(--accent), var(--accent-dim));
      color: #fff;
      box-shadow: 0 4px 24px rgba(108, 158, 255, 0.35);
    }

    .btn-primary:hover {
      transform: translateY(-1px);
      box-shadow: 0 8px 32px rgba(108, 158, 255, 0.45);
    }

    .btn-ghost {
      background: transparent;
      color: var(--muted);
      border: 1px solid rgba(255, 255, 255, 0.12);
      margin-left: 0.75rem;
    }

    .btn-ghost:hover {
      color: var(--text);
      border-color: rgba(255, 255, 255, 0.2);
    }

    section {
      padding: 3rem 0;
      border-top: 1px solid rgba(255, 255, 255, 0.06);
    }

    section h2 {
      font-size: 1.5rem;
      font-weight: 700;
      letter-spacing: -0.02em;
      margin-bottom: 1.25rem;
    }

    #calc-heading {
      text-align: center;
    }

    #contact-heading {
      text-align: center;
    }

    #text-heading {
      text-align: center;
      margin-bottom: 0.08rem;
    }

    .text-page-kbd-hint {
      text-align: center;
      font-size: 0.7rem;
      font-weight: 400;
      letter-spacing: 0.03em;
      line-height: 1.25;
      color: #2e323c;
      color: color-mix(in srgb, var(--bg) 75%, var(--muted) 25%);
      margin: 0 auto 1.35rem;
      max-width: 56rem;
    }

    .text-tool-title {
      font-size: 0.78rem;
      font-weight: 600;
      letter-spacing: 0.12em;
      text-transform: uppercase;
      color: var(--muted);
      text-align: center;
      margin: 0 0 1.25rem;
    }

    .text-case-tool {
      position: relative;
      max-width: 56rem;
      margin: 0 auto;
      padding: 1.5rem 1.35rem 1.65rem;
      padding-top: 2.35rem;
      background: var(--surface);
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: var(--radius);
      display: grid;
      grid-template-columns: 1fr 1fr;
      grid-template-rows: auto auto;
      grid-template-areas:
        "actions actions"
        "source result";
      gap: 1rem 1.25rem;
    }

    .text-case-chain-toggle {
      position: absolute;
      top: 0.55rem;
      right: 0.55rem;
      z-index: 6;
      overflow: visible;
      width: 1.85rem;
      height: 1.85rem;
      padding: 0;
      margin: 0;
      border: 1px solid rgba(139, 146, 168, 0.45);
      border-radius: 10px;
      background: rgba(0, 0, 0, 0.28);
      color: var(--muted);
      font-family: inherit;
      font-size: 1.05rem;
      font-weight: 600;
      line-height: 1;
      cursor: pointer;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      transition: border-color 0.15s ease, color 0.15s ease, background 0.15s ease, box-shadow 0.15s ease;
    }

    .text-case-chain-toggle:hover {
      border-color: rgba(148, 163, 184, 0.55);
      color: #cbd5e1;
      background: rgba(255, 255, 255, 0.05);
    }

    .text-case-chain-toggle:focus-visible {
      outline: none;
      box-shadow: 0 0 0 2px rgba(108, 158, 255, 0.45);
    }

    .text-case-chain-toggle[aria-pressed="true"] {
      border-color: rgba(94, 214, 189, 0.55);
      background: rgba(94, 214, 189, 0.15);
      color: #7ee3c8;
    }

    .text-case-chain-toggle[aria-pressed="true"]:hover {
      border-color: rgba(126, 227, 200, 0.7);
      background: rgba(94, 214, 189, 0.22);
      color: #c6f5e8;
    }

    .text-case-chain-toggle .text-case-chain-toggle__tooltip {
      top: calc(100% + 8px);
      right: auto;
      bottom: auto;
      left: 50%;
      transform: translate(-50%, 6px);
    }

    .text-case-chain-toggle:hover .text-case-chain-toggle__tooltip,
    .text-case-chain-toggle:focus-visible .text-case-chain-toggle__tooltip {
      opacity: 1;
      visibility: visible;
      transform: translate(-50%, 0);
      transition-delay: 500ms;
    }

    .text-case-pane--in {
      grid-area: source;
      min-width: 0;
    }

    .text-case-pane--out {
      grid-area: result;
      min-width: 0;
    }

    .text-case-out-field {
      position: relative;
      display: block;
      min-width: 0;
    }

    .text-case-copy {
      position: absolute;
      top: 0.5rem;
      right: 0.5rem;
      z-index: 2;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 2.25rem;
      height: 2.25rem;
      padding: 0;
      border: 1px solid rgba(255, 255, 255, 0.14);
      border-radius: 8px;
      background: rgba(22, 26, 38, 0.92);
      color: var(--muted);
      cursor: pointer;
      transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
      box-shadow: 0 1px 3px rgba(0, 0, 0, 0.35);
    }

    .text-case-copy:hover {
      color: #9ee9d4;
      border-color: rgba(94, 214, 189, 0.38);
      background: rgba(94, 214, 189, 0.1);
    }

    .text-case-copy:focus-visible {
      outline: none;
      box-shadow: 0 0 0 2px rgba(94, 214, 189, 0.25);
    }

    .text-case-copy:active {
      transform: scale(0.96);
    }

    .text-case-copy__icon--check {
      display: none;
    }

    .text-case-copy--done {
      color: #7ee3c8;
      border-color: rgba(94, 214, 189, 0.45);
      background: rgba(94, 214, 189, 0.12);
    }

    .text-case-copy--done .text-case-copy__icon--copy {
      display: none;
    }

    .text-case-copy--done .text-case-copy__icon--check {
      display: block;
    }

    .text-case-pane__label {
      display: block;
      font-size: 0.72rem;
      font-weight: 600;
      letter-spacing: 0.1em;
      text-transform: uppercase;
      color: var(--muted);
      margin-bottom: 0.45rem;
    }

    .text-case-pane textarea {
      width: 100%;
      min-height: 16rem;
      padding: 0.85rem 0.95rem;
      border-radius: 12px;
      border: 1px solid rgba(255, 255, 255, 0.12);
      background: rgba(0, 0, 0, 0.28);
      color: var(--text);
      font-family: inherit;
      font-size: 0.95rem;
      line-height: 1.5;
      resize: vertical;
      box-sizing: border-box;
    }

    .text-case-pane textarea:focus {
      outline: none;
      border-color: rgba(94, 214, 189, 0.45);
      box-shadow: 0 0 0 2px rgba(94, 214, 189, 0.1);
    }

    .text-case-pane--out textarea {
      cursor: default;
      color: hsl(355 42% 82%);
    }

    .text-case-pane--out .text-case-out-field textarea {
      padding-right: 2.85rem;
    }

    .text-case-actions {
      grid-area: actions;
      display: flex;
      flex-direction: column;
      flex-wrap: nowrap;
      justify-content: flex-start;
      align-items: center;
      gap: 0;
    }

    .text-case-actions > .text-case-actions__converter-title {
      width: 100%;
      margin: 0 0 0.85rem;
    }

    .text-case-actions-row {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      align-items: stretch;
      width: 100%;
    }

    .text-case-titres {
      display: flex;
      flex-direction: column;
      align-items: center;
      width: 100%;
      margin-top: 1.35rem;
      padding-top: 1.25rem;
      border-top: 1px solid rgba(255, 255, 255, 0.06);
    }

    .text-case-join-wrap,
    .text-case-split-wrap {
      position: relative;
      display: flex;
      flex: 0 1 auto;
      min-width: 0;
      align-self: stretch;
    }

    .text-case-join-wrap > .text-case-segmented__btn {
      padding-left: 0.85rem;
    }

    .text-case-split-wrap > .text-case-segmented__btn {
      padding-right: 0.85rem;
    }

    .text-case-titres__help {
      position: absolute;
      top: 0;
      right: 0;
      transform: translate(50%, -50%);
      z-index: 5;
      width: 1.125rem;
      height: 1.125rem;
      padding: 0;
      margin: 0;
      border: 1px solid rgba(94, 214, 189, 0.45);
      border-radius: 50%;
      background: rgba(94, 214, 189, 0.12);
      color: #7ee3c8;
      font-family: inherit;
      font-size: 0.62rem;
      font-weight: 700;
      line-height: 1;
      cursor: help;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      transition: border-color 0.15s ease, color 0.15s ease, background 0.15s ease, box-shadow 0.15s ease;
    }

    .text-case-titres__help:hover,
    .text-case-titres__help:focus-visible {
      border-color: rgba(126, 227, 200, 0.65);
      color: #c6f5e8;
      background: rgba(94, 214, 189, 0.22);
    }

    .text-case-titres__help:focus-visible {
      outline: none;
      box-shadow: 0 0 0 2px rgba(94, 214, 189, 0.35);
    }

    .text-case-titres__help--tl {
      right: auto;
      left: 0;
      transform: translate(-50%, -50%);
    }

    .text-case-titres__tooltip {
      position: absolute;
      top: 50%;
      right: calc(100% + 8px);
      left: auto;
      width: max-content;
      max-width: min(16rem, calc(100vw - 2.5rem));
      padding: 0.55rem 0.65rem;
      border-radius: 8px;
      border: 1px solid rgba(255, 255, 255, 0.1);
      background: var(--surface);
      color: var(--text);
      font-size: 0.78rem;
      font-weight: 400;
      letter-spacing: 0.02em;
      line-height: 1.45;
      text-align: left;
      text-transform: none;
      white-space: normal;
      box-shadow: 0 8px 24px rgba(0, 0, 0, 0.45);
      z-index: 30;
      pointer-events: none;
      opacity: 0;
      visibility: hidden;
      transform: translate(6px, -50%);
      transition:
        opacity 0.2s ease,
        visibility 0.2s ease,
        transform 0.2s ease;
    }

    .text-case-titres__tooltip--right {
      left: calc(100% + 8px);
      right: auto;
      transform: translate(-6px, -50%);
    }

    .text-case-titres__help:hover .text-case-titres__tooltip,
    .text-case-titres__help:focus-visible .text-case-titres__tooltip {
      opacity: 1;
      visibility: visible;
      transform: translate(0, -50%);
      transition-delay: 500ms;
    }

    .text-case-titres__title {
      margin: 0 0 0.85rem;
    }

    .text-case-segmented {
      display: inline-flex;
      flex-wrap: nowrap;
      max-width: 100%;
      border-radius: 10px;
      border: 1px solid rgba(51, 65, 85, 0.75);
      background: rgba(10, 14, 22, 0.98);
      overflow: visible;
      box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
    }

    .text-case-segmented__btn {
      font-family: inherit;
      font-size: 0.8rem;
      font-weight: 500;
      letter-spacing: 0.02em;
      margin: 0;
      padding: 0.55rem 1.1rem;
      border: none;
      border-radius: 0;
      cursor: pointer;
      background: transparent;
      color: #94a3b8;
      white-space: nowrap;
      flex: 0 1 auto;
      min-width: 0;
      transition: background 0.15s ease, color 0.15s ease;
    }

    .text-case-segmented__btn + .text-case-segmented__btn,
    .text-case-segmented > .text-case-segmented__btn + .text-case-translit-wrap,
    .text-case-segmented > .text-case-join-wrap + .text-case-split-wrap {
      border-left: 1px solid rgba(51, 65, 85, 0.65);
    }

    .text-case-translit-wrap {
      position: relative;
      display: flex;
      align-items: stretch;
      flex: 0 1 auto;
      min-width: 0;
      align-self: stretch;
    }

    .text-case-translit-wrap__main {
      padding-right: 2.1rem;
      min-width: 6.25rem;
    }

    .text-case-translit-g {
      position: absolute;
      top: 50%;
      right: 0.28rem;
      z-index: 5;
      transform: translateY(-50%);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 1.5rem;
      height: 1.5rem;
      padding: 0;
      margin: 0;
      overflow: visible;
      border: 1px solid rgba(94, 214, 189, 0.45);
      border-radius: 6px;
      background: rgba(94, 214, 189, 0.12);
      color: #7ee3c8;
      font-family: inherit;
      font-size: 0.72rem;
      font-weight: 700;
      line-height: 1;
      letter-spacing: 0.02em;
      cursor: pointer;
      transition: border-color 0.15s ease, color 0.15s ease, background 0.15s ease, box-shadow 0.15s ease;
    }

    .text-case-translit-g__mark {
      display: block;
      line-height: 1;
    }

    .text-case-translit-g__tooltip {
      top: calc(100% + 8px);
      right: auto;
      bottom: auto;
      left: 50%;
      transform: translate(-50%, 6px);
    }

    .text-case-translit-g:hover .text-case-translit-g__tooltip,
    .text-case-translit-g:focus-visible .text-case-translit-g__tooltip {
      opacity: 1;
      visibility: visible;
      transform: translate(-50%, 0);
      transition-delay: 500ms;
    }

    .text-case-translit-g:hover,
    .text-case-translit-g:focus-visible {
      border-color: rgba(126, 227, 200, 0.65);
      color: #c6f5e8;
      background: rgba(94, 214, 189, 0.22);
    }

    .text-case-translit-g:focus-visible {
      outline: none;
      box-shadow: 0 0 0 2px rgba(94, 214, 189, 0.35);
    }

    .text-case-translit-g:active {
      transform: translateY(-50%) scale(0.96);
    }

    .text-case-segmented__btn:hover:not([aria-pressed="true"]) {
      background: rgba(255, 255, 255, 0.04);
      color: #cbd5e1;
    }

    .text-case-segmented__btn[aria-pressed="true"] {
      background: #2d3a54;
      color: #ffffff;
      font-weight: 600;
    }

    .text-case-segmented__btn:focus-visible {
      outline: none;
      box-shadow: inset 0 0 0 2px rgba(108, 158, 255, 0.55);
      z-index: 1;
    }

    .text-case-segmented__btn:active {
      filter: brightness(0.97);
    }

    .text-case-titres-actions {
      align-self: center;
      overflow: visible;
    }

    @media (max-width: 640px) {
      .text-case-segmented {
        flex-wrap: wrap;
        overflow: visible;
        width: 100%;
      }

      .text-case-segmented__btn {
        font-size: 0.72rem;
        padding: 0.5rem 0.55rem;
        flex: 1 1 42%;
        text-align: center;
        border-left: none;
      }

      .text-case-join-wrap > .text-case-segmented__btn,
      .text-case-split-wrap > .text-case-segmented__btn,
      .text-case-translit-wrap > .text-case-segmented__btn {
        flex: 1 1 auto;
        min-width: 0;
      }

      .text-case-segmented > .text-case-segmented__btn:nth-child(even),
      .text-case-segmented > .text-case-join-wrap:nth-child(even),
      .text-case-segmented > .text-case-split-wrap:nth-child(even),
      .text-case-segmented > .text-case-translit-wrap:nth-child(even) {
        border-left: 1px solid rgba(51, 65, 85, 0.55);
      }

      .text-case-segmented > .text-case-segmented__btn:nth-child(n + 3),
      .text-case-segmented > .text-case-join-wrap:nth-child(n + 3),
      .text-case-segmented > .text-case-split-wrap:nth-child(n + 3),
      .text-case-segmented > .text-case-translit-wrap:nth-child(n + 3) {
        border-top: 1px solid rgba(51, 65, 85, 0.55);
      }

      .text-case-titres-actions {
        flex-wrap: nowrap;
        overflow: hidden;
        width: auto;
        max-width: 100%;
      }

      .text-case-titres-actions > .text-case-join-wrap,
      .text-case-titres-actions > .text-case-split-wrap {
        flex: 1 1 auto;
        min-width: 0;
      }
    }

    @media (max-width: 720px) {
      .text-case-tool {
        grid-template-columns: 1fr;
        grid-template-areas:
          "actions"
          "source"
          "result";
      }
    }

    .cards {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
      gap: 1.25rem;
    }

    .card {
      background: var(--surface);
      border: 1px solid rgba(255, 255, 255, 0.06);
      border-radius: var(--radius);
      padding: 1.5rem;
      transition: border-color 0.2s, transform 0.2s;
    }

    .card:hover {
      border-color: rgba(108, 158, 255, 0.25);
      transform: translateY(-2px);
    }

    .card h3 {
      font-size: 1.1rem;
      margin-bottom: 0.5rem;
    }

    .card p {
      color: var(--muted);
      font-size: 0.95rem;
    }

    .contact-box {
      background: var(--surface);
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: var(--radius);
      padding: 2rem;
      max-width: 34rem;
      margin-left: auto;
      margin-right: auto;
    }

    .contact-box a {
      color: var(--accent);
      text-decoration: none;
    }

    .contact-box a:hover {
      text-decoration: underline;
    }

    .contact-box__lead {
      color: var(--muted);
      margin-bottom: 1.25rem;
      line-height: 1.55;
    }

    .contact-form {
      display: flex;
      flex-direction: column;
      gap: 1rem;
    }

    .contact-form__row label {
      display: block;
      font-size: 0.875rem;
      color: var(--muted);
      margin-bottom: 0.35rem;
    }

    .contact-form__input,
    .contact-form__textarea {
      width: 100%;
      padding: 0.65rem 0.75rem;
      border-radius: 10px;
      border: 1px solid rgba(255, 255, 255, 0.12);
      background: rgba(15, 18, 25, 0.85);
      color: var(--text);
      font-family: inherit;
      font-size: 0.95rem;
    }

    .contact-form__input:focus,
    .contact-form__textarea:focus {
      outline: none;
      border-color: rgba(94, 214, 189, 0.45);
      box-shadow: 0 0 0 2px rgba(94, 214, 189, 0.12);
    }

    .contact-form__textarea {
      min-height: 8rem;
      resize: vertical;
    }

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

    .contact-form__status {
      font-size: 0.875rem;
      min-height: 1.35rem;
      color: var(--muted);
    }

    .contact-form__status.is-ok {
      color: #7ee3c8;
    }

    .contact-form__status.is-err {
      color: hsl(355 55% 72%);
    }

    .contact-form__submit {
      margin-top: 0.25rem;
      align-self: flex-start;
      border: none;
      cursor: pointer;
      font-family: inherit;
    }

    #contact {
      display: flex;
      flex-direction: column;
      align-items: center;
    }

    /* Блок по центру страницы; строки внутри — с левого края блока */
    .contact-quote {
      align-self: center;
      width: min(100%, 36rem);
      max-width: 36rem;
      margin: 2.25rem 0 0;
      padding: 0 1rem 2rem;
      box-sizing: border-box;
      border: none;
      text-align: left;
    }

    .contact-quote__text {
      margin: 0;
      font-family: "Marck Script", cursive;
      font-size: clamp(1.15rem, 3.5vw, 1.65rem);
      font-weight: 400;
      line-height: 1.6;
      letter-spacing: 0.03em;
      color: color-mix(in srgb, var(--muted) 72%, transparent);
      text-shadow: 0 1px 24px color-mix(in srgb, var(--bg) 40%, transparent);
    }

    .contact-quote__author-foot {
      margin: 0.75rem 0 0;
      width: 100%;
    }

    .contact-quote__author.contact-quote__easter-btn {
      display: block;
      width: 100%;
      margin: 0;
      padding: 0;
      border: none;
      background: none;
      font: inherit;
      font-family: "Marck Script", cursive;
      font-size: clamp(0.95rem, 2.6vw, 1.25rem);
      font-weight: 400;
      color: color-mix(in srgb, var(--muted) 58%, transparent);
      text-align: right;
      cursor: pointer;
      text-shadow: inherit;
      transition: color 0.15s ease;
    }

    .contact-quote__easter-btn:hover {
      color: color-mix(in srgb, var(--muted) 78%, var(--text) 22%);
    }

    .contact-quote__easter-btn:focus-visible {
      outline: none;
      box-shadow: 0 0 0 2px rgba(126, 227, 200, 0.45);
      border-radius: 6px;
    }

    .contact-easter-quote {
      align-self: center;
      width: min(100%, 36rem);
      max-width: 36rem;
      margin: 0.85rem 0 0;
      padding: 0 1rem 1.5rem;
      box-sizing: border-box;
      text-align: left;
      animation: contact-easter-in 0.4s ease;
    }

    .contact-easter-quote[hidden] {
      display: none !important;
    }

    @media (prefers-reduced-motion: reduce) {
      .contact-easter-quote {
        animation: none;
      }
    }

    @keyframes contact-easter-in {
      from {
        opacity: 0;
        transform: translateY(-0.35rem);
      }

      to {
        opacity: 1;
        transform: translateY(0);
      }
    }

    .contact-easter-quote__text {
      margin: 0;
      font-family: "Nunito", system-ui, sans-serif;
      font-weight: 700;
      font-size: clamp(1.05rem, 2.9vw, 1.38rem);
      line-height: 1.5;
      letter-spacing: 0.01em;
      color: #f0d090;
      text-shadow: 0 0 20px rgba(240, 208, 144, 0.2);
    }

    .contact-easter-quote__author {
      margin: 0.45rem 0 0;
      font-family: "Nunito", system-ui, sans-serif;
      font-weight: 600;
      font-size: clamp(0.95rem, 2.4vw, 1.12rem);
      text-align: right;
      color: color-mix(in srgb, #f0d090 55%, var(--muted) 45%);
    }

    .calc-wrap {
      background: var(--surface);
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: var(--radius);
      padding: 1.5rem 1.35rem 1.65rem;
      display: flex;
      flex-direction: column;
      gap: 0;
      width: 100%;
    }

    .calc-panel {
      padding: 1.35rem 0 1.5rem;
      border-bottom: 1px solid rgba(255, 255, 255, 0.07);
    }

    .calc-panel:last-of-type {
      border-bottom: none;
      padding-bottom: 0.35rem;
    }

    .calc-panel-title {
      font-size: 1rem;
      font-weight: 700;
      letter-spacing: -0.02em;
      color: var(--text);
      margin: 0 0 1.1rem;
      line-height: 1.3;
      text-align: center;
    }

    .calc-panel-sub {
      font-size: 0.72rem;
      font-weight: 600;
      letter-spacing: 0.12em;
      text-transform: uppercase;
      color: var(--muted);
      margin: 1rem 0 0.45rem;
      text-align: center;
    }

    .calc-panel-sub:first-child {
      margin-top: 0;
    }

    .calc-advanced {
      margin-top: 0.5rem;
      padding-top: 1.1rem;
      border-top: 1px solid rgba(255, 255, 255, 0.1);
    }

    .calc-advanced-head {
      margin-bottom: 0.85rem;
    }

    .calc-advanced-title {
      font-size: 0.78rem;
      font-weight: 600;
      letter-spacing: 0.04em;
      text-transform: uppercase;
      color: var(--muted);
      margin: 0 0 0.4rem;
    }

    .calc-advanced-desc {
      font-size: 0.875rem;
      color: var(--muted);
      line-height: 1.45;
      max-width: 38rem;
      margin: 0;
    }

    .calc-advanced .calc-geeks {
      margin-top: 0;
    }

    .calc-extras {
      margin-top: 1.5rem;
      padding-top: 1.5rem;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      display: flex;
      flex-direction: column;
      gap: 0.75rem;
    }

    .calc-extras .calc-geeks {
      margin-top: 0;
    }

    .calc-preview {
      background: rgba(0, 0, 0, 0.42);
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: 14px;
      display: flex;
      align-items: center;
      justify-content: center;
      padding: 1rem 1rem 1.15rem;
    }

    .calc-preview--top {
      margin: 0 0 0.35rem;
    }

    .calc-preview__stack {
      --preview-caption: hsl(355 42% 78%);
      display: flex;
      flex-direction: column;
      align-items: center;
      width: 100%;
    }

    /* Высота = maxBoxH в JS (260px), иначе скачет вёрстка под превью */
    .calc-preview__frame {
      display: flex;
      align-items: center;
      justify-content: center;
      width: 100%;
      height: 16.25rem;
      min-height: 16.25rem;
      box-sizing: border-box;
    }

    .calc-preview-inner {
      background: linear-gradient(145deg, hsl(165 48% 34%), hsl(158 52% 28%));
      border: 2px solid var(--preview-caption);
      border-radius: 8px;
      box-shadow: 0 0 0 1px color-mix(in srgb, var(--preview-caption) 28%, transparent), 0 12px 40px rgba(0, 0, 0, 0.35);
      transition: width 0.2s ease, height 0.2s ease;
    }

    .calc-preview-label {
      margin-top: 0.65rem;
      min-height: 3.65rem;
      display: flex;
      align-items: center;
      justify-content: center;
      text-align: center;
      font-size: clamp(1.95rem, 5.5vw, 2.5rem);
      font-weight: 700;
      font-variant-numeric: tabular-nums;
      letter-spacing: 0.03em;
      color: var(--preview-caption);
    }

    .calc-dim-block {
      display: flex;
      flex-direction: column;
      align-items: center;
      width: 100%;
      margin: 0 auto 1.15rem;
    }

    .calc-dim-grid {
      --calc-dim-lock-size: 2.1rem;
      --calc-dim-chain-col: 2.85rem;
      --calc-dim-cell-gap: 0.8rem;
      /* от правого/левого края ячейки замка до края кнопки цепочки (зазор + половина свободы в колонке цепи) */
      --calc-dim-line-extend: calc(var(--calc-dim-cell-gap) + (var(--calc-dim-chain-col) - var(--calc-dim-lock-size)) / 2);
      --calc-dim-line-icon-gap: 0.4rem;
      display: grid;
      grid-template-columns: min(7.75rem, 34vw) 2.85rem min(7.75rem, 34vw);
      grid-template-rows: auto auto;
      gap: var(--calc-dim-cell-gap);
      width: 100%;
      max-width: fit-content;
      margin: 0 auto;
      justify-content: center;
      justify-items: center;
      align-items: center;
    }

    .calc-dim-locks-cell {
      display: flex;
      align-items: center;
      justify-content: center;
      min-width: 0;
      width: 100%;
    }

    .calc-dim-grid__locks-w {
      grid-column: 1;
      grid-row: 1;
      position: relative;
    }

    /* Линия к цепочке: не влияет на раскладку, замок остаётся по центру ячейки */
    .calc-dim-grid__locks-w::after {
      content: "";
      position: absolute;
      pointer-events: none;
      z-index: 0;
      left: calc(50% + var(--calc-dim-lock-size) / 2 + var(--calc-dim-line-icon-gap));
      top: 50%;
      width: calc(50% - var(--calc-dim-lock-size) / 2 + var(--calc-dim-line-extend) - 2 * var(--calc-dim-line-icon-gap));
      height: 2px;
      margin-top: -1px;
      border-radius: 1px;
      background: rgba(255, 255, 255, 0.2);
      box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.15);
    }

    .calc-dim-grid__locks-chain {
      grid-column: 2;
      grid-row: 1;
    }

    .calc-dim-grid__locks-h {
      grid-column: 3;
      grid-row: 1;
      position: relative;
    }

    .calc-dim-grid__locks-h::after {
      content: "";
      position: absolute;
      pointer-events: none;
      z-index: 0;
      right: calc(50% + var(--calc-dim-lock-size) / 2 + var(--calc-dim-line-icon-gap));
      top: 50%;
      width: calc(50% - var(--calc-dim-lock-size) / 2 + var(--calc-dim-line-extend) - 2 * var(--calc-dim-line-icon-gap));
      height: 2px;
      margin-top: -1px;
      border-radius: 1px;
      background: rgba(255, 255, 255, 0.2);
      box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.15);
    }

    .calc-dim-grid__locks-w .calc-dim-lock,
    .calc-dim-grid__locks-h .calc-dim-lock {
      position: relative;
      z-index: 1;
    }

    .calc-dim-grid__card-w {
      grid-column: 1;
      grid-row: 2;
    }

    .calc-dim-grid__swap {
      grid-column: 2;
      grid-row: 2;
      align-self: center;
      width: 2.85rem;
      height: 2.85rem;
      border-radius: 999px;
      transform: none;
      font-size: 1.28rem;
    }

    .calc-dim-grid__swap:hover {
      transform: scale(1.06);
    }

    .calc-dim-grid__card-h {
      grid-column: 3;
      grid-row: 2;
    }

    .calc-dim-lock {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 2.1rem;
      height: 2.1rem;
      padding: 0;
      border: 1px solid rgba(255, 255, 255, 0.14);
      border-radius: 9px;
      background: rgba(255, 255, 255, 0.06);
      color: var(--muted);
      cursor: pointer;
      flex-shrink: 0;
      transition: background 0.15s, border-color 0.15s, color 0.15s;
    }

    .calc-dim-lock:hover {
      color: var(--text);
      border-color: rgba(255, 255, 255, 0.22);
    }

    .calc-dim-lock[aria-pressed="true"] {
      color: #7ee3c8;
      border-color: rgba(94, 214, 189, 0.5);
      background: rgba(94, 214, 189, 0.12);
    }

    .calc-dim-lock:focus-visible {
      outline: none;
      box-shadow: 0 0 0 2px rgba(108, 158, 255, 0.35);
    }

    .calc-dim-lock svg {
      display: block;
      width: 22px;
      height: 22px;
    }

    .calc-dim-chain {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 2.1rem;
      height: 2.1rem;
      min-width: 2.1rem;
      padding: 0;
      border: 1px solid rgba(255, 255, 255, 0.14);
      border-radius: 9px;
      background: rgba(255, 255, 255, 0.06);
      color: var(--muted);
      cursor: pointer;
      transition: background 0.15s, border-color 0.15s, color 0.15s;
    }

    .calc-dim-chain:hover {
      color: var(--text);
      border-color: rgba(255, 255, 255, 0.22);
    }

    .calc-dim-chain[aria-pressed="true"] {
      color: #7ee3c8;
      border-color: rgba(94, 214, 189, 0.5);
      background: rgba(94, 214, 189, 0.12);
    }

    .calc-dim-chain:focus-visible {
      outline: none;
      box-shadow: 0 0 0 2px rgba(108, 158, 255, 0.35);
    }

    .calc-dim-chain__icon {
      display: block;
      flex-shrink: 0;
      transform: rotate(45deg);
      transform-origin: center;
    }

    .calc-dim-grid .calc-dim-layout__card {
      flex: none;
      width: min(7.75rem, 34vw);
      min-width: 0;
      min-height: 0;
      aspect-ratio: 1 / 1;
      box-sizing: border-box;
      padding: 0.65rem 0.55rem;
    }

    .calc-dim-grid .calc-dim-layout__label {
      font-size: 0.86rem;
      letter-spacing: 0.1em;
    }

    .calc-dim-grid .calc-dim-layout__input {
      font-size: clamp(1.35rem, 6.6vw, 1.85rem);
    }

    .calc-dim-grid .calc-dim-layout__unit {
      font-size: 0.9rem;
    }

    .calc-dim-grid .calc-dim-layout__unit--ops {
      font-size: 1rem;
      line-height: 1;
      /* Компенсация высоты: как при 0.58rem, чтобы не сдвигать подпись и поле при justify-content: center */
      margin-top: calc(0.58rem - 1rem);
      font-weight: 600;
      letter-spacing: 0.14em;
      color: #7ee3c8;
      white-space: nowrap;
    }

    /* Ширина и высота: число по центру квадрата, подпись и +−×÷ по той же вертикали */
    .calc-dim-grid .calc-dim-grid__card-w,
    .calc-dim-grid .calc-dim-grid__card-h {
      display: grid;
      grid-template-rows: 1fr auto 1fr;
      grid-template-columns: 1fr;
      justify-items: center;
      align-items: center;
      gap: 0;
    }

    .calc-dim-grid .calc-dim-grid__card-w .calc-dim-layout__label,
    .calc-dim-grid .calc-dim-grid__card-h .calc-dim-layout__label {
      align-self: end;
      margin-bottom: 0.45rem;
      text-align: center;
      width: 100%;
    }

    .calc-dim-grid .calc-dim-grid__card-w .calc-dim-layout__input,
    .calc-dim-grid .calc-dim-grid__card-h .calc-dim-layout__input {
      grid-row: 2;
      justify-self: stretch;
      width: 100%;
      max-width: 100%;
      text-align: center;
    }

    .calc-dim-grid .calc-dim-grid__card-w .calc-dim-layout__unit--ops,
    .calc-dim-grid .calc-dim-grid__card-h .calc-dim-layout__unit--ops {
      grid-row: 3;
      align-self: start;
      margin-top: 0.45rem;
    }

    .calc-presets-res {
      justify-content: center;
    }

    .calc-presets-grid button {
      text-align: center;
      justify-content: center;
    }

    .calc-custom-format {
      margin-top: 1.15rem;
      margin-left: auto;
      margin-right: auto;
      display: flex;
      flex-direction: column;
      align-items: center;
      width: fit-content;
      max-width: 100%;
      padding: 0.85rem 1rem;
      border-radius: 12px;
      background: rgba(0, 0, 0, 0.22);
      border: 1px solid rgba(255, 255, 255, 0.07);
      box-sizing: border-box;
    }

    .calc-custom-format > .calc-panel-sub {
      margin-top: 0;
    }

    .calc-custom-format__row {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      justify-content: center;
      gap: 0.5rem 0.65rem;
    }

    .calc-custom-format__input {
      width: 5.5rem;
      padding: 0.6rem 0.55rem;
      border-radius: 10px;
      border: 1px solid rgba(255, 255, 255, 0.12);
      background: rgba(15, 18, 25, 0.85);
      color: var(--text);
      font-family: inherit;
      font-size: 1rem;
      font-weight: 600;
      font-variant-numeric: tabular-nums;
      text-align: center;
    }

    .calc-custom-format__input:focus {
      outline: none;
      border-color: rgba(94, 214, 189, 0.45);
      box-shadow: 0 0 0 2px rgba(94, 214, 189, 0.15);
    }

    #calc input[type="number"] {
      -moz-appearance: textfield;
    }

    #calc input[type="number"]::-webkit-outer-spin-button,
    #calc input[type="number"]::-webkit-inner-spin-button {
      -webkit-appearance: none;
      margin: 0;
    }

    .calc-swap-asp {
      flex-shrink: 0;
      width: 2.35rem;
      height: 2.35rem;
      padding: 0;
      border-radius: 10px;
      border: 1px solid rgba(255, 255, 255, 0.14);
      background: rgba(255, 255, 255, 0.06);
      color: rgba(126, 227, 200, 0.95);
      font-family: inherit;
      font-size: 1.1rem;
      line-height: 1;
      cursor: pointer;
      transition: background 0.15s, border-color 0.15s, color 0.15s, transform 0.15s;
    }

    .calc-swap-asp:hover {
      background: rgba(94, 214, 189, 0.12);
      border-color: rgba(94, 214, 189, 0.35);
      color: #b8f5e0;
      transform: scale(1.05);
    }

    .calc-swap-asp:focus-visible {
      outline: none;
      box-shadow: 0 0 0 2px rgba(94, 214, 189, 0.35);
    }

    .calc-geeks--bar {
      margin-top: 0;
      border-radius: 12px;
      padding: 0.65rem 1rem 0.75rem;
    }

    .calc-geeks--bar summary {
      font-size: 0.92rem;
      font-weight: 600;
      color: var(--text);
    }

    .calc-row {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 0.75rem 1rem;
    }

    .calc-row label {
      font-size: 0.875rem;
      color: var(--muted);
    }

    .calc-input-group {
      display: inline-flex;
      align-items: center;
      gap: 0.5rem;
    }

    .calc-input-group input[type="number"] {
      width: 6.5rem;
      padding: 0.55rem 0.65rem;
      border-radius: 8px;
      border: 1px solid rgba(255, 255, 255, 0.12);
      background: var(--bg);
      color: var(--text);
      font-family: inherit;
      font-size: 0.95rem;
      font-variant-numeric: tabular-nums;
    }

    .calc-input-group input[type="number"]:disabled {
      opacity: 0.45;
      cursor: not-allowed;
    }

    .calc-input-group input[type="number"]:focus {
      outline: none;
      border-color: var(--accent);
      box-shadow: 0 0 0 2px rgba(108, 158, 255, 0.25);
    }

    .calc-dim-layout__card {
      flex: 1;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 0.45rem;
      min-height: 5.35rem;
      padding: 0.85rem 0.75rem;
      background: rgba(0, 0, 0, 0.32);
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-radius: 14px;
    }

    .calc-dim-layout__label {
      font-size: 0.62rem;
      font-weight: 600;
      letter-spacing: 0.14em;
      text-transform: uppercase;
      color: var(--muted);
      line-height: 1;
      cursor: pointer;
      user-select: none;
    }

    .calc-dim-layout__input {
      width: 100%;
      max-width: 100%;
      border: none;
      background: transparent;
      padding: 0;
      margin: 0;
      text-align: center;
      font-family: inherit;
      font-size: clamp(1.4rem, 4.2vw, 1.85rem);
      font-weight: 700;
      font-variant-numeric: tabular-nums;
      color: var(--text);
      line-height: 1;
    }

    .calc-dim-layout__input:disabled {
      opacity: 0.45;
      cursor: not-allowed;
    }

    .calc-dim-layout__input:focus {
      outline: none;
    }

    .calc-dim-layout__card:focus-within {
      border-color: rgba(94, 214, 189, 0.4);
      box-shadow: 0 0 0 2px rgba(94, 214, 189, 0.12);
    }

    .calc-dim-layout__unit {
      font-size: 0.65rem;
      color: var(--muted);
      font-variant-numeric: tabular-nums;
      line-height: 1;
    }

    .calc-dim-layout__unit--ops {
      font-variant-numeric: normal;
      letter-spacing: 0.12em;
      user-select: none;
    }

    .calc-swap-wh {
      flex-shrink: 0;
      width: 2rem;
      height: 2rem;
      padding: 0;
      border-radius: 10px;
      border: 1px solid rgba(255, 255, 255, 0.14);
      background: rgba(255, 255, 255, 0.06);
      color: rgba(126, 227, 200, 0.95);
      font-family: inherit;
      font-size: 1.15rem;
      line-height: 1;
      cursor: pointer;
      transform: none;
      transition: background 0.15s, border-color 0.15s, color 0.15s, transform 0.15s;
    }

    .calc-swap-wh:hover {
      background: rgba(94, 214, 189, 0.12);
      border-color: rgba(94, 214, 189, 0.35);
      color: #b8f5e0;
      transform: scale(1.05);
    }

    .calc-swap-wh:focus-visible {
      outline: none;
      box-shadow: 0 0 0 2px rgba(108, 158, 255, 0.35);
    }

    .presets {
      display: flex;
      flex-wrap: wrap;
      gap: 0.5rem;
    }

    .presets button {
      font-family: inherit;
      font-size: 0.8rem;
      padding: 0.4rem 0.75rem;
      border-radius: 8px;
      border: 1px solid rgba(255, 255, 255, 0.1);
      background: rgba(255, 255, 255, 0.04);
      color: var(--muted);
      cursor: pointer;
      transition: border-color 0.15s, color 0.15s, background 0.15s;
    }

    .presets button:hover {
      color: var(--text);
      border-color: rgba(255, 255, 255, 0.18);
    }

    .presets button[aria-pressed="true"] {
      border-color: rgba(108, 158, 255, 0.45);
      color: var(--accent);
      background: rgba(108, 158, 255, 0.08);
    }

    .presets-res button {
      border-color: rgba(94, 214, 189, 0.15);
      background: rgba(94, 214, 189, 0.06);
    }

    .presets-res button:hover {
      border-color: rgba(94, 214, 189, 0.28);
    }

    .presets-res button[aria-pressed="true"] {
      border-color: rgba(94, 214, 189, 0.55);
      color: #7ee3c8;
      background: rgba(94, 214, 189, 0.12);
    }

    #presets-wrap .calc-presets-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(5.25rem, auto));
      justify-content: center;
      gap: 0.5rem;
    }

    #presets-wrap #presets-main.calc-presets-grid,
    #presets-wrap #presets-anam.calc-presets-grid {
      grid-template-columns: repeat(auto-fit, minmax(3.85rem, max-content));
      justify-content: center;
      justify-items: stretch;
    }

    #presets-wrap #presets-main button,
    #presets-wrap #presets-anam button {
      padding-left: 0.3rem;
      padding-right: 0.3rem;
    }

    .calc-meta {
      font-size: 0.85rem;
      color: var(--muted);
      font-variant-numeric: tabular-nums;
    }

    .calc-meta strong {
      color: var(--text);
      font-weight: 600;
    }

    .calc-check {
      display: flex;
      align-items: center;
      gap: 0.5rem;
      font-size: 0.875rem;
      color: var(--muted);
      cursor: pointer;
      user-select: none;
    }

    .calc-check input {
      width: 1rem;
      height: 1rem;
      accent-color: var(--accent);
    }

    .calc-geeks {
      margin-top: 1rem;
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: 10px;
      padding: 0.55rem 0.85rem 0.65rem;
      background: rgba(0, 0, 0, 0.22);
    }

    .calc-geeks summary {
      font-size: 0.875rem;
      font-weight: 600;
      color: var(--muted);
      cursor: pointer;
      user-select: none;
      list-style: none;
    }

    .calc-geeks summary::-webkit-details-marker {
      display: none;
    }

    .calc-geeks summary::before {
      content: "▸ ";
      display: inline-block;
      margin-right: 0.25rem;
      color: var(--accent);
      transition: transform 0.15s ease;
    }

    .calc-geeks[open] summary::before {
      transform: rotate(90deg);
    }

    .calc-geeks summary:hover {
      color: var(--text);
    }

    .calc-geeks-body {
      padding-top: 0.65rem;
    }

    .calc-geeks-body .calc-meta {
      margin-top: 0.85rem;
      margin-bottom: 0;
    }

    .calc-useful-links-list {
      list-style: none;
      padding: 0;
      margin: 0;
    }

    .calc-useful-links-list li {
      font-size: 0.875rem;
      margin-bottom: 0.35rem;
    }

    .calc-useful-links-list a {
      color: var(--accent);
      text-decoration: none;
    }

    .calc-useful-links-list a:hover {
      text-decoration: underline;
    }

    @media (max-width: 640px) {
      nav ul {
        gap: 1rem;
      }

      .btn-ghost {
        margin-left: 0;
        margin-top: 0.75rem;
        display: inline-flex;
      }

      .hero .actions {
        display: flex;
        flex-direction: column;
        align-items: flex-start;
      }
    }