@layer reset, tokens, base, layout, components, states;

@layer reset {
  *, *::before, *::after { box-sizing: border-box; }
  * { margin: 0; }
  html { -webkit-text-size-adjust: 100%; }
  body { min-block-size: 100svh; }
  img, svg { display: block; max-inline-size: 100%; }
  button, input, textarea { font: inherit; color: inherit; }
  button { border: 0; background: none; cursor: pointer; }
  fieldset { min-inline-size: 0; border: 0; padding: 0; }
  ul { list-style: none; padding: 0; }
  a { color: inherit; }
  [hidden] { display: none !important; }
}

@layer tokens {
  :root {
    --surface: #fff;
    --surface-tint: #f7efec;
    --surface-soft: #f5f2ef;
    --surface-invert: #342a22;
    --ink: #342a22;
    --ink-strong: #231f20;
    --ink-muted: #6b6058;
    --ink-invert: #f7efec;
    --line: #ded5ce;
    --line-strong: #b4ada7;
    --danger: #9f342c;
    --danger-soft: #fff1ef;
    --success: #2f6751;
    --success-soft: #edf7f1;
    --font-display: "Playfair Display", "Times New Roman", Georgia, serif;
    --font-text: "Manrope", system-ui, -apple-system, "Segoe UI", sans-serif;
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-pill: 999px;
    --shell: 1200px;
    --ease: cubic-bezier(.2, .7, .3, 1);
    --focus: #895f4c;
  }
}

@layer base {
  html { scroll-behavior: smooth; }

  body {
    background: var(--surface);
    color: var(--ink);
    font-family: var(--font-text);
    font-size: 1rem;
    line-height: 1.55;
    font-synthesis-weight: none;
  }

  h1, h2 { font-family: var(--font-display); font-weight: 400; line-height: 1.04; }
  h1 { font-size: clamp(2.6rem, 2rem + 3vw, 5.75rem); letter-spacing: -.035em; }
  h2 { font-size: clamp(1.75rem, 1.5rem + 1vw, 2.65rem); letter-spacing: -.025em; }
  h3 { line-height: 1.25; }
  :where(h1, h2, h3, legend, summary) { text-wrap: balance; }
  p { text-wrap: pretty; }

  :where(a, button, input, textarea, summary):focus-visible {
    outline: 2px solid var(--focus);
    outline-offset: 3px;
  }

  .shell { inline-size: min(calc(100% - 3rem), var(--shell)); margin-inline: auto; }
  .overline { font-size: .78rem; font-weight: 700; letter-spacing: .11em; line-height: 1.3; text-transform: uppercase; }

  .skip {
    position: fixed;
    inset-block-start: -5rem;
    inset-inline-start: 1rem;
    z-index: 100;
    padding: .75rem 1rem;
    background: var(--surface);
    color: var(--ink);
    border-radius: var(--radius-sm);
    text-decoration: none;
    box-shadow: 0 8px 30px rgb(0 0 0 / .18);
  }

  .skip:focus { inset-block-start: 1rem; }

  @media (width < 40rem) {
    .shell { inline-size: min(calc(100% - 2rem), var(--shell)); }
  }
}

@layer layout {
  .channel-header {
    background: var(--surface-invert);
    color: var(--ink-invert);
    border-block-end: 1px solid rgb(247 239 236 / .15);
  }

  .channel-header__inner {
    min-block-size: 5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
  }

  .logo { flex: none; inline-size: clamp(7.75rem, 11vw, 9.875rem); }
  .logo img { inline-size: 100%; block-size: auto; filter: brightness(0) invert(1); }

  .channel-header__actions { display: flex; align-items: center; gap: clamp(1rem, 3vw, 2.5rem); }

  .channel-intro {
    background: var(--surface-invert);
    color: var(--ink-invert);
    padding-block: clamp(3rem, 6vw, 5.5rem) clamp(3.5rem, 7vw, 6rem);
  }

  .channel-intro__grid {
    display: grid;
    grid-template-columns: minmax(0, 1.45fr) minmax(17rem, .55fr);
    gap: clamp(2.5rem, 7vw, 7rem);
    align-items: end;
  }

  .channel-intro__copy h1 { max-inline-size: 50rem; font-size: clamp(2.75rem, 2rem + 3.4vw, 4.85rem); }
  .channel-intro__copy .overline { color: rgb(247 239 236 / .58); margin-block-end: 1.25rem; }
  .channel-intro__lead { max-inline-size: 42rem; margin-block-start: 1.5rem; color: rgb(247 239 236 / .76); font-size: clamp(1.05rem, 1rem + .25vw, 1.25rem); }

  .channel-intro__aside {
    padding-block-start: 1.4rem;
    border-block-start: 1px solid rgb(247 239 236 / .28);
  }

  .channel-intro__aside h2 { font-family: var(--font-text); font-size: .78rem; font-weight: 700; letter-spacing: .09em; line-height: 1.4; text-transform: uppercase; }
  .channel-intro__aside p { margin-block-start: 1rem; color: rgb(247 239 236 / .7); font-size: .95rem; }

  .channel-workspace { background: var(--surface-tint); padding-block: clamp(3.5rem, 7vw, 6.5rem); }
  .channel-workspace__grid { display: grid; grid-template-columns: minmax(17rem, .58fr) minmax(0, 1.42fr); gap: clamp(2rem, 4vw, 3.75rem); align-items: start; }
  .channel-guide { display: grid; position: sticky; inset-block-start: 2rem; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-lg); overflow: hidden; }
  .form-card { background: var(--surface); border-radius: var(--radius-lg); padding: clamp(1.5rem, 3.5vw, 3rem); box-shadow: 0 24px 70px rgb(52 42 34 / .08); }
  .form-card__header { max-inline-size: 40rem; padding-block-end: clamp(1.5rem, 2.4vw, 2rem); border-block-end: 1px solid var(--line); }
  .form-card__header .overline { color: var(--ink-muted); margin-block-end: .75rem; }
  .form-card__header p:last-child { margin-block-start: .75rem; color: var(--ink-muted); }

  .form-section { padding-block: clamp(1.5rem, 2vw, 1.9rem); border-block-end: 1px solid var(--line); }
  .form-section > legend {
    float: left;
    inline-size: 100%;
    padding: 0;
    margin-block-end: .85rem;
    font-size: 1.08rem;
    font-weight: 750;
    line-height: 1.35;
  }
  .form-section > legend + * { clear: both; }
  .form-section__lead { color: var(--ink-muted); margin-block-start: -.25rem; margin-block-end: .9rem; font-size: .94rem; }
  .form-section--fields { display: grid; gap: 1.5rem; }
  .field-row { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.25rem; }
  .form-submit { display: flex; justify-content: space-between; align-items: center; gap: 1.5rem; padding-block-start: 2rem; }
  .form-submit > p { max-inline-size: 21rem; color: var(--ink-muted); font-size: .86rem; }

  .channel-information { scroll-margin-block-start: 2rem; padding-block: clamp(4rem, 7vw, 6.5rem); }
  .channel-information__grid { display: grid; grid-template-columns: minmax(19rem, .68fr) minmax(0, 1.32fr); gap: clamp(2rem, 5vw, 5rem); }
  .channel-information .overline { color: var(--ink-muted); margin-block-end: 1rem; }
  .information-list { border-block-start: 1px solid var(--line-strong); }

  .channel-footer { background: var(--surface-invert); color: rgb(247 239 236 / .62); font-size: .8rem; }
  .channel-footer__inner { min-block-size: 5rem; display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding-block: 1rem; }
  .channel-footer__links { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: .5rem 1.25rem; }
  .channel-footer a { text-underline-offset: 4px; }

  @media (width < 56rem) {
    .channel-intro__grid, .channel-workspace__grid, .channel-information__grid { grid-template-columns: 1fr; }
    .channel-intro__aside { max-inline-size: 34rem; }
    .form-card { order: 1; }
    .channel-guide { order: 2; position: static; grid-template-columns: repeat(3, 1fr); }
    .channel-footer__inner { align-items: flex-start; flex-direction: column; }
    .channel-footer__links { justify-content: flex-start; }
    .channel-guide__header { grid-column: 1 / -1; }
    .guide-card + .guide-card { border-inline-start: 1px solid var(--line); }
  }

  @media (width < 44rem) {
    .channel-header__inner { min-block-size: 4.5rem; }
    .logo { inline-size: 6.75rem; }
    .back-link { display: none !important; }
    .channel-guide { grid-template-columns: 1fr; }
    .guide-card + .guide-card { border-inline-start: 0; }
    .field-row { grid-template-columns: 1fr; }
    .form-submit { align-items: stretch; flex-direction: column; }
    .form-submit > p { max-inline-size: none; }
  }
}

@layer components {
  .lang { display: flex; padding: .2rem; border: 1px solid rgb(247 239 236 / .2); border-radius: var(--radius-pill); }
  .lang button { min-inline-size: 2.35rem; min-block-size: 2rem; padding-inline: .55rem; border-radius: var(--radius-pill); color: rgb(247 239 236 / .58); font-size: .72rem; font-weight: 750; }
  .lang button:hover { color: var(--ink-invert); background: rgb(247 239 236 / .08); }
  .lang button[aria-pressed="true"] { background: var(--ink-invert); color: var(--ink); }

  .back-link, .text-link { display: inline-flex; align-items: center; gap: .55rem; font-size: .84rem; font-weight: 650; text-underline-offset: 4px; }
  .back-link svg, .text-link svg { inline-size: 1rem; fill: none; stroke: currentColor; stroke-linecap: round; stroke-linejoin: round; stroke-width: 1.5; }
  .channel-intro__aside .text-link { margin-block-start: 1.25rem; color: var(--ink-invert); }

  .channel-guide__header { padding: 1.5rem; background: var(--surface-soft); }
  .channel-guide__header .overline { color: var(--ink-muted); }
  .channel-guide__header h2 { margin-block-start: .65rem; font-size: 1.8rem; }
  .guide-card { background: var(--surface); padding: 1.35rem 1.5rem 1.5rem; border-block-start: 1px solid var(--line); }
  .guide-card h3 { font-family: var(--font-text); font-size: .96rem; font-weight: 750; letter-spacing: 0; line-height: 1.35; }
  .guide-card p:last-child { margin-block-start: .65rem; color: var(--ink-muted); font-size: .88rem; }

  .mode-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .75rem; }
  .mode-option { display: block; cursor: pointer; }
  .mode-option input { position: absolute; opacity: 0; pointer-events: none; }
  .mode-option__surface { block-size: 100%; display: grid; grid-template-columns: 1.25rem 1fr; gap: .75rem; padding: 1.05rem; border: 1px solid var(--line); border-radius: var(--radius-md); transition: border-color .2s var(--ease), background .2s var(--ease), box-shadow .2s var(--ease); }
  .mode-option:hover .mode-option__surface { border-color: var(--line-strong); }
  .mode-option input:focus-visible + .mode-option__surface { outline: 2px solid var(--focus); outline-offset: 3px; }
  .mode-option input:checked + .mode-option__surface { border-color: var(--ink); background: var(--surface-soft); box-shadow: inset 0 0 0 1px var(--ink); }
  .mode-option__mark { inline-size: 1.15rem; block-size: 1.15rem; margin-block-start: .12rem; border: 1px solid var(--line-strong); border-radius: 50%; background: var(--surface); box-shadow: inset 0 0 0 4px var(--surface); }
  .mode-option input:checked + .mode-option__surface .mode-option__mark { border-color: var(--ink); background: var(--ink); }
  .mode-option strong, .mode-option small { display: block; }
  .mode-option strong { font-size: .94rem; line-height: 1.35; }
  .mode-option small { margin-block-start: .3rem; color: var(--ink-muted); font-size: .8rem; line-height: 1.45; }

  .field { display: grid; align-content: start; gap: .5rem; }
  .field label { font-size: .88rem; font-weight: 700; }
  .field__heading { display: flex; justify-content: space-between; align-items: baseline; gap: 1rem; }
  .required { color: var(--ink-muted); font-size: .72rem; font-weight: 550; }
  .field input, .field textarea {
    inline-size: 100%;
    border: 1px solid var(--line);
    border-radius: var(--radius-sm);
    background: var(--surface);
    transition: border-color .2s var(--ease), box-shadow .2s var(--ease);
  }
  .field input { min-block-size: 3.15rem; padding-inline: .9rem; }
  .field textarea { min-block-size: 7rem; padding: .85rem .9rem; resize: vertical; line-height: 1.55; }
  .field input:hover, .field textarea:hover { border-color: var(--line-strong); }
  .field input:focus, .field textarea:focus { border-color: var(--ink); outline: 0; box-shadow: 0 0 0 3px rgb(137 95 76 / .15); }
  .field input::placeholder, .field textarea::placeholder { color: #948a82; opacity: 1; }
  .field__meta { display: flex; justify-content: space-between; gap: 1rem; color: var(--ink-muted); font-size: .75rem; }
  .field__meta > :first-child { max-inline-size: 36rem; }
  .field__help { color: var(--ink-muted); font-size: .75rem; }
  .counter { white-space: nowrap; font-variant-numeric: tabular-nums; }

  .contact-fields { background: var(--surface-soft); margin-inline: clamp(-1rem, -2vw, -2rem); padding-inline: clamp(1rem, 2vw, 2rem); }

  .file-picker { display: flex; align-items: center; gap: 1rem; padding: 1.1rem; border: 1px dashed var(--line-strong); border-radius: var(--radius-md); cursor: pointer; transition: background .2s var(--ease), border-color .2s var(--ease); }
  .file-picker:hover { background: var(--surface-soft); border-color: var(--ink); }
  .file-picker:focus-within { outline: 2px solid var(--focus); outline-offset: 3px; }
  .file-picker input { position: absolute; opacity: 0; inline-size: 1px; block-size: 1px; }
  .file-picker svg { inline-size: 1.7rem; flex: none; fill: none; stroke: currentColor; stroke-linecap: round; stroke-linejoin: round; stroke-width: 1.5; }
  .file-picker strong, .file-picker small { display: block; }
  .file-picker strong { font-size: .9rem; }
  .file-picker small { margin-block-start: .2rem; color: var(--ink-muted); font-size: .76rem; }

  .file-list { display: grid; gap: .5rem; margin-block-start: .75rem; }
  .file-item { display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: center; gap: 1rem; padding: .75rem .85rem; background: var(--surface-soft); border-radius: var(--radius-sm); }
  .file-item__name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: .82rem; font-weight: 650; }
  .file-item__size { color: var(--ink-muted); font-size: .72rem; }
  .file-item button { min-inline-size: 2rem; min-block-size: 2rem; display: grid; place-items: center; border-radius: 50%; color: var(--ink-muted); }
  .file-item button:hover { background: var(--surface); color: var(--ink); }
  .file-item button svg { inline-size: .95rem; fill: none; stroke: currentColor; stroke-linecap: round; stroke-width: 1.6; }

  .privacy-check { display: grid; gap: 1rem; }
  .privacy-check__notice { color: var(--ink-muted); font-size: .84rem; }
  .privacy-check__notice a { color: var(--ink); text-underline-offset: 4px; }
  .check-option { display: grid; grid-template-columns: 1.25rem 1fr; gap: .8rem; align-items: start; cursor: pointer; font-size: .86rem; }
  .check-option input { position: absolute; opacity: 0; pointer-events: none; }
  .check-option__box { inline-size: 1.2rem; block-size: 1.2rem; display: grid; place-items: center; margin-block-start: .08rem; border: 1px solid var(--line-strong); border-radius: 4px; background: var(--surface); }
  .check-option__box svg { inline-size: .9rem; fill: none; stroke: var(--surface); stroke-linecap: round; stroke-linejoin: round; stroke-width: 2; opacity: 0; }
  .check-option input:checked + .check-option__box { border-color: var(--ink); background: var(--ink); }
  .check-option input:checked + .check-option__box svg { opacity: 1; }
  .check-option input:focus-visible + .check-option__box { outline: 2px solid var(--focus); outline-offset: 3px; }

  .submit-button { min-block-size: 3.4rem; display: inline-flex; align-items: center; justify-content: center; gap: .8rem; padding-inline: 1.35rem; border-radius: var(--radius-pill); background: var(--ink); color: var(--ink-invert); font-size: .9rem; font-weight: 700; transition: background .2s var(--ease), transform .2s var(--ease); }
  .submit-button:hover { background: var(--ink-strong); transform: translateY(-1px); }
  .submit-button:disabled { cursor: wait; opacity: .66; transform: none; }
  .submit-button__arrow { inline-size: 1rem; fill: none; stroke: currentColor; stroke-linecap: round; stroke-linejoin: round; stroke-width: 1.5; }
  .spinner { inline-size: 1rem; block-size: 1rem; display: none; border: 2px solid rgb(247 239 236 / .35); border-block-start-color: currentColor; border-radius: 50%; animation: spin .8s linear infinite; }
  .submit-button[data-loading="true"] .spinner { display: block; }
  .submit-button[data-loading="true"] .submit-button__arrow { display: none; }

  .form-status { margin-block-start: 1.5rem; padding: 1rem; border: 1px solid #dfaaa5; border-radius: var(--radius-sm); background: var(--danger-soft); color: #6f241e; }
  .form-status h3 { font-size: .9rem; }
  .form-status p { margin-block-start: .3rem; font-size: .82rem; }
  .secure-preview-notice { margin-block-start: 1.5rem; padding: 1rem; border: 1px solid var(--line); border-radius: var(--radius-sm); background: var(--surface-soft); }
  .secure-preview-notice h3 { font-size: .9rem; }
  .secure-preview-notice p { margin-block-start: .3rem; color: var(--ink-muted); font-size: .82rem; }
  form[data-preview-only="true"] :is(input, textarea, button, .file-picker, .check-option, .mode-option) { cursor: not-allowed; }
  .field-error { color: var(--danger); font-size: .76rem; line-height: 1.45; }

  .success-panel { padding-block: clamp(2rem, 5vw, 4rem) 1rem; }
  .success-panel__mark { inline-size: 3rem; block-size: 3rem; display: grid; place-items: center; margin-block-end: 2rem; border-radius: 50%; background: var(--success-soft); color: var(--success); }
  .success-panel__mark svg { inline-size: 1.5rem; fill: none; stroke: currentColor; stroke-linecap: round; stroke-linejoin: round; stroke-width: 1.8; }
  .success-panel .overline { color: var(--success); margin-block-end: .8rem; }
  .success-panel > p:not(.overline) { max-inline-size: 38rem; margin-block-start: 1rem; color: var(--ink-muted); }
  .reference-box { display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: center; gap: .35rem 1rem; margin-block-start: 2rem; padding: 1rem 1.1rem; border: 1px solid var(--line); border-radius: var(--radius-md); background: var(--surface-soft); }
  .reference-box > span { grid-column: 1 / -1; color: var(--ink-muted); font-size: .72rem; }
  .reference-box strong { font-size: clamp(1.05rem, 3vw, 1.45rem); letter-spacing: .06em; }
  .copy-button, .secondary-button { text-decoration: underline; text-underline-offset: 4px; font-size: .8rem; font-weight: 650; }
  .secondary-button { margin-block-start: 1.5rem; color: var(--ink-muted); }

  .information-list details { border-block-end: 1px solid var(--line); }
  .information-list summary { display: flex; justify-content: space-between; align-items: center; gap: 2rem; padding-block: 1.25rem; cursor: pointer; list-style: none; font-weight: 700; }
  .information-list summary::-webkit-details-marker { display: none; }
  .information-list summary::after { content: "+"; font-size: 1.35rem; font-weight: 400; }
  .information-list details[open] summary::after { content: "−"; }
  .information-list__body { display: grid; gap: 1rem; max-inline-size: 48rem; padding-block: 0 1.5rem; color: var(--ink-muted); font-size: .92rem; }
  .information-list__body .text-link { color: var(--ink); }

  .honeypot { position: absolute; inset-inline-start: -10000px; inline-size: 1px; block-size: 1px; overflow: hidden; }

  @media (width < 38rem) {
    .mode-grid { grid-template-columns: 1fr; }
    .form-card { border-radius: var(--radius-md); }
    .field__meta { align-items: flex-start; flex-direction: column; gap: .25rem; }
    .field__meta .counter { align-self: flex-end; }
    .reference-box { grid-template-columns: 1fr; }
    .copy-button { justify-self: start; margin-block-start: .4rem; }
  }
}

@layer states {
  [aria-invalid="true"] { border-color: var(--danger) !important; box-shadow: 0 0 0 2px rgb(159 52 44 / .1); }
  [data-field-group][data-invalid="true"] > legend { color: var(--danger); }
  .mode-section[data-invalid="true"] .mode-option__surface { border-color: #d88e88; }
  .privacy-check[data-invalid="true"] .check-option__box { border-color: var(--danger); }
  @keyframes spin { to { transform: rotate(360deg); } }

  @media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  }
}