/* E-mail AntiSpoofing — postal identity.
   Airmail paper, postal-navy ink, cancellation red, stamp-pad green. */

@font-face {
  font-family: 'Archivo';
  font-style: normal;
  font-display: swap;
  font-weight: 100 900;
  font-stretch: 62% 125%;
  src: url(../fonts/archivo-latin.woff2) format('woff2-variations'), url(../fonts/archivo-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: 'Archivo';
  font-style: normal;
  font-display: swap;
  font-weight: 100 900;
  font-stretch: 62% 125%;
  src: url(../fonts/archivo-latin-ext.woff2) format('woff2-variations'), url(../fonts/archivo-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 {
  --paper: #EEF1F4;
  --paper-2: #E2E7ED;
  --sheet: #F9FBFC;
  --ink: #15233F;
  --ink-2: #4A5A75;
  --rule: #C9D2DC;
  --red: #C41E3A;
  --green: #1E6B47;
  --amber: #9A5F0E;
  --neutral: #5A6780;
  --focus: #2457C5;
  --red-wash: #F7E4E7;
  --green-wash: #E1EFE7;
  --amber-wash: #F5EBDC;
  --neutral-wash: #E4E8EE;

  --font: 'Archivo', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --mono: ui-monospace, 'SF Mono', 'Cascadia Mono', Menlo, Consolas, monospace;

  --step--1: 0.875rem;
  --step-0: 1.0625rem;
  --step-1: 1.25rem;
  --step-2: 1.6rem;
  --step-3: 2.1rem;
  --step-4: clamp(2.5rem, 6.2vw, 4.75rem);

  --r-sm: 6px;
  --r-md: 12px;
  --wrap: 1140px;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #0F1A2E;
    --paper-2: #16223A;
    --sheet: #121E34;
    --ink: #E4EAF2;
    --ink-2: #9EACC2;
    --rule: #2B3A57;
    --red: #FF6B80;
    --green: #52C78F;
    --amber: #E6A84A;
    --neutral: #9AA6BA;
    --focus: #7FA7FF;
    --red-wash: #3A1A26;
    --green-wash: #13342A;
    --amber-wash: #382A15;
    --neutral-wash: #1D2943;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --paper: #0F1A2E; --paper-2: #16223A; --sheet: #121E34; --ink: #E4EAF2; --ink-2: #9EACC2;
  --rule: #2B3A57; --red: #FF6B80; --green: #52C78F; --amber: #E6A84A; --neutral: #9AA6BA;
  --focus: #7FA7FF; --red-wash: #3A1A26; --green-wash: #13342A; --amber-wash: #382A15; --neutral-wash: #1D2943;
  color-scheme: dark;
}

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

html { -webkit-text-size-adjust: 100%; scroll-padding-top: 1rem; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font);
  font-size: var(--step-0);
  line-height: 1.6;
  font-stretch: 100%;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* Airmail edge: the one decorative border on the page */
body::before {
  content: '';
  display: block;
  height: 8px;
  background: repeating-linear-gradient(-45deg,
    var(--red) 0 14px, transparent 14px 22px, var(--ink) 22px 36px, transparent 36px 44px);
}

a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }
b { font-weight: 650; }
code { font-family: var(--mono); font-size: 0.9em; }

:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; border-radius: 3px; }

.wrap { width: min(100% - 32px, var(--wrap)); margin-inline: auto; }

.skip {
  position: absolute; left: 16px; top: -100px; z-index: 10;
  background: var(--ink); color: var(--paper); padding: 8px 14px; border-radius: var(--r-sm);
}
.skip:focus { top: 16px; }

/* ---------------------------------------------------------------- masthead */
.masthead { border-bottom: 1px solid var(--rule); }
.masthead__row {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding-block: 14px; flex-wrap: wrap;
}
.logo { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); }
.logo__mark { width: 52px; height: 32px; color: var(--ink); flex: none; }
.logo__name { font-weight: 800; font-stretch: 112%; font-size: 1.05rem; letter-spacing: -0.01em; }
.nav { display: flex; gap: 4px 20px; flex-wrap: wrap; font-size: var(--step--1); font-weight: 550; }
.nav a { text-decoration: none; color: var(--ink-2); padding: 4px 0; }
.nav a:hover, .nav a[aria-current="page"] { color: var(--ink); text-decoration: underline; }

/* -------------------------------------------------------------------- hero */
.hero { padding-block: clamp(36px, 7vw, 76px) 40px; }
.hero__intro { max-width: 52rem; }
.hero__title {
  margin: 0 0 18px;
  font-size: var(--step-4);
  font-weight: 850;
  font-stretch: 118%;
  line-height: 0.98;
  letter-spacing: -0.025em;
  text-wrap: balance;
}
.lead { margin: 0; max-width: 40rem; font-size: var(--step-1); line-height: 1.5; color: var(--ink-2); text-wrap: pretty; }

/* -------------------------------------------------------------------- tool */
.tool { margin-top: clamp(28px, 4vw, 44px); }

.tabs { display: flex; gap: 6px; border-bottom: 2px solid var(--ink); flex-wrap: wrap; }
.tab {
  appearance: none; border: 2px solid transparent; border-bottom: 0;
  background: transparent; color: var(--ink-2);
  font: inherit; font-weight: 700; font-stretch: 105%; font-size: var(--step-0);
  padding: 10px 18px 9px; margin-bottom: -2px; border-radius: var(--r-sm) var(--r-sm) 0 0; cursor: pointer;
}
.tab:hover { color: var(--ink); }
.tab[aria-selected="true"] { color: var(--ink); background: var(--sheet); border-color: var(--ink); }

.panel { background: var(--sheet); border: 2px solid var(--ink); border-top: 0; border-radius: 0 0 var(--r-md) var(--r-md); padding: clamp(18px, 3vw, 30px); }
.panel[hidden] { display: none; }
.panel__grid { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: 32px; align-items: start; }

.field { display: flex; flex-direction: column; gap: 8px; min-width: 0; }
.field__label { font-weight: 700; font-size: var(--step--1); }
.optional { font-weight: 400; color: var(--ink-2); }
.field__help { margin: 0; font-size: var(--step--1); color: var(--ink-2); }

textarea, input[type="text"], input[type="email"] {
  width: 100%;
  font: inherit;
  color: var(--ink);
  background: var(--paper);
  border: 1.5px solid var(--rule);
  border-radius: var(--r-sm);
  padding: 12px 14px;
}
textarea {
  font-family: var(--mono);
  font-size: 0.82rem;
  line-height: 1.55;
  min-height: 280px;
  resize: vertical;
  white-space: pre;
  overflow-wrap: normal;
  overflow-x: auto;
  tab-size: 4;
}
textarea:focus, input:focus { border-color: var(--ink); outline: 3px solid color-mix(in srgb, var(--focus) 35%, transparent); outline-offset: 0; }
::placeholder { color: color-mix(in srgb, var(--ink-2) 75%, transparent); }

.actions { display: flex; align-items: center; gap: 8px 14px; flex-wrap: wrap; margin-top: 8px; }
.actions__or { color: var(--ink-2); font-size: var(--step--1); }

.btn {
  appearance: none; font: inherit; font-weight: 700; font-stretch: 105%; cursor: pointer;
  border-radius: 999px; padding: 12px 22px; border: 2px solid var(--ink); line-height: 1.2;
  text-decoration: none; display: inline-flex; align-items: center; gap: 8px;
}
.btn--primary { background: var(--ink); color: var(--paper); }
.btn--primary:hover { background: color-mix(in srgb, var(--ink) 86%, var(--paper)); }
.btn--primary:active { transform: translateY(1px); }
.btn--primary[disabled] { opacity: 0.7; cursor: progress; }
.btn--ghost { background: transparent; color: var(--ink); }
.btn--ghost:hover { background: var(--paper-2); }
.btn--link {
  border: 0; padding: 4px 2px; background: none; color: var(--ink); font-weight: 600; border-radius: 3px;
  text-decoration: underline; text-decoration-style: dotted; text-underline-offset: 4px; font-size: var(--step--1);
}
.btn--link:hover { text-decoration-style: solid; }

.howto { border-left: 2px solid var(--rule); padding-left: 22px; font-size: var(--step--1); }
.howto__title { font-size: var(--step-0); font-weight: 750; margin: 0 0 8px; }
.howto details { border-bottom: 1px solid var(--rule); }
.howto summary { cursor: pointer; padding: 9px 0; font-weight: 650; list-style-position: outside; }
.howto ol { margin: 0 0 12px; padding-left: 1.2em; color: var(--ink-2); }
.howto li + li { margin-top: 3px; }

.domainform { display: grid; grid-template-columns: minmax(0, 1fr) 240px auto; gap: 18px 20px; align-items: start; }
.domainform input { font-size: var(--step-1); padding: 12px 14px; }
.field--selector input { font-size: var(--step-0); padding: 15px 14px; }
.actions--domain { margin-top: 27px; }

.tool__error {
  margin: 14px 0 0; padding: 12px 16px; border-radius: var(--r-sm);
  background: var(--red-wash); color: var(--ink); border-left: 4px solid var(--red); font-weight: 550;
}
.noscript { margin-top: 16px; padding: 12px 16px; background: var(--amber-wash); border-radius: var(--r-sm); }

/* ------------------------------------------------------------------ result */
.result { padding-block: 24px 64px; outline: none; }
.result[hidden] { display: none; }

.verdict {
  display: grid; grid-template-columns: auto minmax(0, 1fr); gap: clamp(20px, 4vw, 48px); align-items: center;
  padding: clamp(22px, 4vw, 40px); border-radius: var(--r-md);
  border: 2px solid var(--tone); background: var(--wash);
}
.verdict--pass { --tone: var(--green); --wash: var(--green-wash); }
.verdict--fail { --tone: var(--red); --wash: var(--red-wash); }
.verdict--warn { --tone: var(--amber); --wash: var(--amber-wash); }
.verdict--neutral { --tone: var(--neutral); --wash: var(--neutral-wash); }

.verdict__title {
  margin: 0 0 10px; font-size: var(--step-3); font-weight: 850; font-stretch: 112%;
  line-height: 1.05; letter-spacing: -0.02em; text-wrap: balance; overflow-wrap: anywhere;
}
.verdict__explain { margin: 0; max-width: 38rem; font-size: var(--step-1); line-height: 1.5; text-wrap: pretty; }
.verdict__from { margin: 14px 0 0; color: var(--ink-2); font-size: var(--step--1); overflow-wrap: anywhere; }
.verdict__from span { color: var(--ink); font-weight: 650; }

/* The postmark — the one bold element */
.stamp { position: relative; width: clamp(170px, 24vw, 230px); aspect-ratio: 1; color: var(--tone); transform: rotate(-9deg); }
.stamp__svg { width: 100%; height: 100%; overflow: visible; display: block; }
.stamp__ink { stroke: currentColor; fill: currentColor; }
.stamp__ink circle, .stamp__ink line, .stamp__ink path { fill: none; }
.stamp__ink text { stroke: none; font-family: var(--font); }
.stamp__rim { font-size: 14px; font-weight: 750; font-stretch: 72%; letter-spacing: 0.07em; }
.stamp__word { font-size: 40px; font-weight: 900; font-stretch: 62%; letter-spacing: 0.02em; }
.stamp__small { font-size: 12px; font-weight: 700; font-stretch: 80%; letter-spacing: 0.3em; }
.stamp__grade { font-size: 86px; font-weight: 900; font-stretch: 70%; }
.stamp__waves {
  position: absolute; width: 44%; left: 72%; top: 26%; color: var(--tone); opacity: 0.8;
  transform: rotate(9deg); pointer-events: none; z-index: 0;
}

.stamp.is-pressing { animation: press 520ms cubic-bezier(.2, .9, .25, 1.2) both; }
.stamp.is-pressing .stamp__waves { animation: waves 620ms ease-out both; }
@keyframes press {
  0% { transform: rotate(-16deg) scale(1.9); opacity: 0; filter: blur(3px); }
  55% { transform: rotate(-8deg) scale(0.94); opacity: 1; filter: blur(0); }
  100% { transform: rotate(-9deg) scale(1); opacity: 1; }
}
@keyframes waves {
  0%, 45% { clip-path: inset(0 100% 0 0); }
  100% { clip-path: inset(0 0 0 0); }
}

.warnings { list-style: none; margin: 18px 0 0; padding: 0; display: grid; gap: 8px; }
.warnings__item {
  position: relative; padding: 12px 16px 12px 46px; border-radius: var(--r-sm);
  background: var(--sheet); border: 1px solid var(--rule); max-width: 60rem;
}
.warnings__item::before {
  content: '!'; position: absolute; left: 14px; top: 12px; width: 20px; height: 20px; border-radius: 50%;
  display: grid; place-items: center; font-weight: 900; font-size: 13px; line-height: 1;
  background: var(--neutral); color: var(--sheet);
}
.warnings__item--high::before { background: var(--red); }
.warnings__item--medium::before { background: var(--amber); }
.warnings__item--info::before { content: 'i'; background: var(--ink-2); }

.section-title { font-size: var(--step-1); font-weight: 800; font-stretch: 108%; margin: 40px 0 6px; }

.checks { margin: 0; border-top: 2px solid var(--ink); }
.checks__row {
  display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: 8px 28px;
  padding: 18px 0; border-bottom: 1px solid var(--rule);
}
.checks__name { margin: 0; display: flex; flex-direction: column; }
.checks__abbr { font-size: var(--step-2); font-weight: 850; font-stretch: 85%; line-height: 1.05; letter-spacing: 0.01em; }
.checks__abbr--long { font-size: var(--step-1); font-stretch: 100%; font-weight: 750; line-height: 1.3; }
.checks__what { color: var(--ink-2); font-size: var(--step--1); }
.checks__body { margin: 0; min-width: 0; }
.checks__body p { margin: 8px 0 0; max-width: 46rem; }
.checks--domain .checks__body p { color: var(--ink); }

.pill {
  display: inline-block; font-size: var(--step--1); font-weight: 750; line-height: 1;
  padding: 6px 11px; border-radius: 999px; border: 1.5px solid var(--tone); color: var(--tone); background: var(--wash);
}
.pill--pass { --tone: var(--green); --wash: var(--green-wash); }
.pill--fail { --tone: var(--red); --wash: var(--red-wash); }
.pill--warn { --tone: var(--amber); --wash: var(--amber-wash); }
.pill--neutral { --tone: var(--neutral); --wash: var(--neutral-wash); }

.record {
  margin: 10px 0 0; padding: 10px 12px; background: var(--paper-2); border-radius: var(--r-sm);
  font-size: 0.8rem; line-height: 1.5; white-space: pre-wrap; overflow-wrap: anywhere; max-width: 46rem;
}

.envelope__list { margin: 0; border-top: 2px solid var(--ink); }
.envelope__row { display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: 4px 28px; padding: 11px 0; border-bottom: 1px solid var(--rule); }
.envelope__row dt { font-weight: 650; color: var(--ink-2); }
.envelope__row dd { margin: 0; overflow-wrap: anywhere; }

.result__actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 32px; }

/* ------------------------------------------------------------------- learn */
.learn { background: var(--ink); color: var(--paper); padding-block: clamp(48px, 8vw, 96px); margin-top: 24px; }
.learn__grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr); gap: clamp(32px, 6vw, 80px); align-items: start; }
.learn h2 { margin: 0 0 18px; font-size: var(--step-3); font-weight: 850; font-stretch: 112%; line-height: 1.05; letter-spacing: -0.02em; }
.learn__intro p { margin: 0 0 16px; max-width: 34rem; color: color-mix(in srgb, var(--paper) 82%, var(--ink)); }
.trio { margin: 0; }
.trio__item { display: grid; grid-template-columns: 120px minmax(0, 1fr); gap: 18px; padding: 20px 0; border-top: 1px solid color-mix(in srgb, var(--paper) 25%, var(--ink)); }
.trio__item:last-child { border-bottom: 1px solid color-mix(in srgb, var(--paper) 25%, var(--ink)); }
.trio dt { font-size: var(--step-2); font-weight: 900; font-stretch: 70%; line-height: 1; letter-spacing: 0.02em; }
.trio dd { margin: 0; color: color-mix(in srgb, var(--paper) 82%, var(--ink)); }
.trio dd b { color: var(--paper); display: block; }
.learn :focus-visible { outline-color: var(--paper); }

/* --------------------------------------------------------------------- faq */
.faq { padding-block: clamp(48px, 8vw, 88px); }
.faq h2 { margin: 0 0 18px; font-size: var(--step-3); font-weight: 850; font-stretch: 112%; letter-spacing: -0.02em; }
.faq__list { border-top: 2px solid var(--ink); max-width: 52rem; }
.faq__item { border-bottom: 1px solid var(--rule); }
.faq__item summary { cursor: pointer; padding: 16px 0; font-weight: 700; font-size: var(--step-1); line-height: 1.35; }
.faq__item p { margin: 0 0 18px; max-width: 44rem; color: var(--ink-2); }

/* ------------------------------------------------------------------ pages */
.page { padding-block: clamp(36px, 7vw, 72px) 72px; }
.page h1 { font-size: var(--step-3); font-weight: 850; font-stretch: 112%; line-height: 1.05; letter-spacing: -0.02em; margin: 0 0 12px; }
.prose { max-width: 42rem; }
.prose h2 { font-size: var(--step-1); font-weight: 800; margin: 32px 0 6px; }
.prose p, .prose li { color: var(--ink); }
.muted { color: var(--ink-2); }
.notice p { margin: 0; }
.notice p + p { margin-top: 4px; }

.contact { display: grid; gap: 18px; max-width: 36rem; margin-top: 28px; }
.contact textarea { font-family: var(--font); font-size: var(--step-0); white-space: pre-wrap; min-height: 180px; }
.hp { position: absolute !important; left: -9999px !important; width: 1px; height: 1px; overflow: hidden; }
.notice { padding: 14px 18px; border-radius: var(--r-sm); border-left: 4px solid var(--tone); background: var(--wash); max-width: 36rem; margin-top: 20px; }
.notice--ok { --tone: var(--green); --wash: var(--green-wash); }
.notice--err { --tone: var(--red); --wash: var(--red-wash); }

.ad { width: min(100% - 32px, var(--wrap)); margin: 24px auto; min-height: 100px; }

/* ------------------------------------------------------------------ footer */
.footer { border-top: 1px solid var(--rule); padding-block: 28px 40px; font-size: var(--step--1); color: var(--ink-2); }
.footer__row { display: flex; gap: 12px 28px; flex-wrap: wrap; align-items: center; }
.footer__by { margin: 0; display: flex; align-items: center; gap: 10px; flex: 1 1 320px; }
.footer__mark { width: 40px; height: 25px; color: var(--ink-2); flex: none; }
.footer__nav { display: flex; gap: 18px; }
.footer__copy { margin: 0; }

/* -------------------------------------------------------------- responsive */
@media (max-width: 900px) {
  .panel__grid { grid-template-columns: minmax(0, 1fr); }
  .howto { border-left: 0; border-top: 2px solid var(--rule); padding: 18px 0 0; }
  .domainform { grid-template-columns: minmax(0, 1fr); }
  .actions--domain { margin-top: 0; }
  .learn__grid { grid-template-columns: minmax(0, 1fr); }
}
@media (max-width: 680px) {
  .verdict { grid-template-columns: minmax(0, 1fr); justify-items: start; }
  .stamp { width: 168px; margin: 6px 0 0 6px; }
  .checks__row, .envelope__row { grid-template-columns: minmax(0, 1fr); }
  .checks__name { flex-direction: row; align-items: baseline; gap: 10px; }
  .trio__item { grid-template-columns: minmax(0, 1fr); gap: 6px; }
  .tab { padding: 9px 12px 8px; font-size: var(--step--1); }
  textarea { min-height: 220px; }
  .nav { gap: 2px 14px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
}

.verdict__text { position: relative; z-index: 1; }