/* =========================================================
   s-t-f-u.com
   One stylesheet. No framework. No webfont. Loads instantly.

   Light only, on purpose. Every page here exists to be sent to
   someone and screenshotted, so it should look identical on every
   machine it lands on. color-scheme below stops the browser
   auto-darkening form controls and scrollbars.
   ========================================================= */

:root {
  color-scheme: light;

  --paper: #faf9f7;
  --paper-2: #f2f0ec;
  --ink: #16151a;
  --ink-2: #4a4852;
  --ink-3: #83808d;
  --line: #e3e0da;
  --line-2: #d3cfc7;
  --accent: #e63329;
  --accent-soft: #fdeceb;
  --good: #1f7a5c;
  --good-soft: #e9f5f0;

  --sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto,
    "Helvetica Neue", "Noto Sans", "Noto Sans Devanagari", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas,
    "Liberation Mono", monospace;

  --w: 40rem;
  --r: 12px;
  --pad: clamp(1.25rem, 5vw, 2rem);
}

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1.0625rem;
  line-height: 1.65;
  letter-spacing: -0.005em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

main {
  max-width: var(--w);
  margin: 0 auto;
  padding: 0 var(--pad) 5rem;
}

.skip {
  position: absolute;
  left: -9999px;
}
.skip:focus {
  left: var(--pad);
  top: 0.5rem;
  z-index: 20;
  background: var(--ink);
  color: var(--paper);
  padding: 0.5rem 0.85rem;
  border-radius: 8px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ---------- header ---------- */

header.site {
  max-width: var(--w);
  margin: 0 auto;
  padding: 1.5rem var(--pad) 2.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  font-family: var(--mono);
  font-size: 0.9375rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-decoration: none;
  color: var(--ink);
  display: inline-flex;
  align-items: baseline;
}
.brand i {
  font-style: normal;
  color: var(--accent);
}
.brand-tld {
  color: var(--ink-3);
  font-weight: 400;
}
.brand:hover .brand-mark {
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* language picker */

.lang {
  position: relative;
  font-size: 0.875rem;
}
.lang > summary {
  list-style: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.6rem;
  border: 1px solid var(--line-2);
  border-radius: 999px;
  color: var(--ink-2);
  user-select: none;
}
.lang > summary::-webkit-details-marker {
  display: none;
}
.lang > summary:hover {
  border-color: var(--ink-3);
  color: var(--ink);
}
.lang-code {
  font-family: var(--mono);
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.06em;
}
.lang svg {
  width: 9px;
  height: 6px;
  transition: transform 0.15s;
}
.lang[open] svg {
  transform: rotate(180deg);
}
.lang-menu {
  position: absolute;
  inset-inline-end: 0;
  top: calc(100% + 6px);
  z-index: 10;
  background: var(--paper);
  border: 1px solid var(--line-2);
  border-radius: var(--r);
  padding: 0.35rem;
  min-width: 10rem;
  box-shadow: 0 12px 32px -12px rgb(0 0 0 / 0.28);
  display: grid;
  gap: 1px;
}
.lang-menu a {
  display: block;
  padding: 0.45rem 0.7rem;
  border-radius: 8px;
  text-decoration: none;
  color: var(--ink-2);
}
.lang-menu a:hover {
  background: var(--paper-2);
  color: var(--ink);
}
.lang-menu a[aria-current] {
  color: var(--accent);
  font-weight: 600;
}

/* ---------- type ---------- */

h1 {
  font-size: clamp(2rem, 6.5vw, 2.9rem);
  line-height: 1.08;
  letter-spacing: -0.035em;
  font-weight: 780;
  margin: 0 0 0.85rem;
  text-wrap: balance;
}

h2 {
  font-size: 1.0625rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  margin: 0 0 1rem;
}

h3 {
  font-size: 1rem;
  font-weight: 660;
  margin: 0 0 0.15rem;
  letter-spacing: -0.01em;
}

p {
  margin: 0 0 1.05rem;
}

.lede {
  font-size: clamp(1.125rem, 3.2vw, 1.3125rem);
  line-height: 1.45;
  color: var(--ink-2);
  letter-spacing: -0.017em;
  margin-bottom: 1.5rem;
  text-wrap: pretty;
}

.eyebrow {
  margin: 0 0 1.15rem;
}

.url-chip {
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: -0.01em;
  color: var(--ink-3);
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.28rem 0.7rem;
  display: inline-block;
  white-space: nowrap;
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
}
.url-chip-lg {
  font-size: 0.9375rem;
  padding: 0.5rem 1rem;
  /* It swaps itself out on a timer — don't let it look like stray selected text. */
  user-select: none;
}
.url-chip b {
  color: var(--accent);
  font-weight: 600;
}

.prose p {
  color: var(--ink-2);
}
.prose strong {
  color: var(--ink);
  font-weight: 660;
}

code {
  font-family: var(--mono);
  font-size: 0.9em;
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-radius: 5px;
  padding: 0.08em 0.34em;
}

.text-link {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
  padding-bottom: 1px;
}
.text-link:hover {
  color: var(--ink);
}

/* ---------- rule ---------- */

.rule {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin: 2rem 0 2.25rem;
  color: var(--line-2);
}
.rule::before,
.rule::after {
  content: "";
  height: 1px;
  background: var(--line);
  flex: 1;
}
.rule span {
  font-size: 0.9rem;
  color: var(--accent);
  line-height: 1;
}
.rule-plain {
  border: 0;
  border-top: 1px solid var(--line);
  margin: 2rem 0 2.25rem;
}

/* ---------- home ---------- */

.hero {
  margin-bottom: 3rem;
}
.hero h1 {
  font-size: clamp(2.1rem, 7.5vw, 3.2rem);
}
.hero-demo {
  margin-top: 1.75rem;
}

.cat {
  margin: 0 0 2.75rem;
}
.cat-h {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.13em;
  color: var(--ink-3);
  font-weight: 640;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid var(--line);
  margin-bottom: 0.35rem;
}

.card-list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.card-list > li {
  border-bottom: 1px solid var(--line);
}
.card-list a {
  display: grid;
  grid-template-columns: 1.75rem 1fr auto;
  align-items: baseline;
  gap: 0 0.75rem;
  padding: 0.95rem 0.5rem 1rem 0.35rem;
  text-decoration: none;
  color: inherit;
  border-radius: 10px;
  transition: background 0.12s;
}
.card-list a:hover {
  background: var(--paper-2);
}
.glyph {
  font-family: var(--mono);
  color: var(--accent);
  font-size: 0.95rem;
  line-height: 1.4;
  text-align: center;
}
.card-t {
  font-weight: 640;
  letter-spacing: -0.015em;
}
.card-d {
  grid-column: 2 / -1;
  color: var(--ink-3);
  font-size: 0.9375rem;
  line-height: 1.45;
  margin-top: 0.1rem;
}
.card-u {
  font-family: var(--mono);
  font-size: 0.6875rem;
  color: var(--ink-3);
  opacity: 0;
  transition: opacity 0.12s;
  white-space: nowrap;
}
.card-list a:hover .card-u {
  opacity: 1;
}
@media (max-width: 30rem) {
  .card-u { display: none; }
}

.card-list-plain a {
  grid-template-columns: 1fr;
}
.card-list-plain .card-d {
  grid-column: 1;
}

.card-list-sm a {
  padding: 0.8rem 0.35rem;
}

/* ---------- article blocks ---------- */

.block {
  margin: 2.5rem 0;
  padding-top: 1.75rem;
  border-top: 1px solid var(--line);
}
.block > h2 {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.13em;
  color: var(--ink-3);
  font-weight: 640;
  margin-bottom: 1.25rem;
}

.reasons {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1.35rem;
}
.reasons li {
  padding-inline-start: 1rem;
  border-inline-start: 2px solid var(--line-2);
}
.reasons p {
  margin: 0;
  color: var(--ink-2);
  font-size: 0.9875rem;
}
.block-do .reasons li {
  border-inline-start-color: var(--good);
}

.block-fine {
  background: var(--good-soft);
  border: 1px solid transparent;
  border-radius: var(--r);
  padding: 1.4rem 1.5rem 0.6rem;
  border-top: 1px solid var(--line);
}
.block-fine > h2 {
  color: var(--good);
  margin-bottom: 0.7rem;
}
.block-fine p {
  color: var(--ink-2);
  font-size: 0.9875rem;
}

.block-faq dl {
  margin: 0;
  display: grid;
  gap: 1.35rem;
}
.block-faq dt {
  font-weight: 640;
  letter-spacing: -0.01em;
  margin-bottom: 0.15rem;
}
.block-faq dd {
  margin: 0;
  color: var(--ink-2);
  font-size: 0.9875rem;
}

/* ---------- send ---------- */

.send {
  margin: 3rem 0 2rem;
  padding: 1.6rem 1.6rem 1.7rem;
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-radius: var(--r);
}
.send h2 {
  font-size: 1.0625rem;
  margin-bottom: 0.3rem;
}
.send-lede {
  color: var(--ink-3);
  font-size: 0.9375rem;
  margin-bottom: 1.1rem;
}
.send-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.btn {
  font: inherit;
  font-size: 0.9375rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  padding: 0.6rem 1.05rem;
  border-radius: 999px;
  border: 1px solid var(--line-2);
  background: var(--paper);
  color: var(--ink);
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
  transition: transform 0.08s, border-color 0.12s, background 0.12s;
}
.btn:hover {
  border-color: var(--ink-3);
}
.btn:active {
  transform: translateY(1px);
}
.btn-primary {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--paper);
}
.btn-primary:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.btn.is-done {
  background: var(--good);
  border-color: var(--good);
  color: #fff;
}

/* ---------- anon dialog ---------- */

dialog.anon {
  width: min(30rem, calc(100vw - 2rem));
  border: 1px solid var(--line-2);
  border-radius: var(--r);
  background: var(--paper);
  color: var(--ink);
  padding: 1.6rem;
  position: relative;
}
dialog.anon::backdrop {
  background: rgb(10 10 12 / 0.55);
  backdrop-filter: blur(3px);
}
.anon-close-form {
  position: absolute;
  inset-inline-end: 0.6rem;
  top: 0.5rem;
  margin: 0;
}
.anon-close {
  background: none;
  border: 0;
  font-size: 1.5rem;
  line-height: 1;
  color: var(--ink-3);
  cursor: pointer;
  padding: 0.25rem 0.4rem;
}
.anon-close:hover {
  color: var(--ink);
}
.anon h2 {
  font-size: 1.125rem;
  margin-bottom: 0.3rem;
}
.anon-lede {
  color: var(--ink-3);
  font-size: 0.9375rem;
  margin-bottom: 1rem;
}
.anon textarea,
.anon-out {
  width: 100%;
  font: inherit;
  font-size: 0.9375rem;
  color: var(--ink);
  background: var(--paper-2);
  border: 1px solid var(--line-2);
  border-radius: 10px;
  padding: 0.7rem 0.85rem;
  resize: vertical;
}
.anon-out {
  font-family: var(--mono);
  font-size: 0.8125rem;
  margin-bottom: 0.85rem;
}
.anon-count {
  font-size: 0.75rem;
  color: var(--ink-3);
  margin: 0.4rem 0 0.9rem;
}
.anon-status {
  font-size: 0.9375rem;
  color: var(--ink-2);
}
.anon-status-bad {
  color: var(--accent);
}

/* ---------- "someone sent you this" ---------- */

.from-someone {
  background: var(--accent-soft);
  border: 1px solid var(--accent);
  border-radius: var(--r);
  padding: 1.15rem 1.35rem 0.6rem;
  margin-bottom: 2.25rem;
}
.from-kicker {
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.13em;
  font-weight: 660;
  color: var(--accent);
  margin-bottom: 0.4rem;
}
.from-note {
  font-size: 1.0625rem;
  line-height: 1.45;
  letter-spacing: -0.015em;
  margin-bottom: 0.4rem;
}
.from-note:empty {
  display: none;
}
.from-sub {
  font-size: 0.875rem;
  color: var(--ink-3);
}

/* ---------- related / footer ---------- */

.related {
  margin-top: 3rem;
  padding-top: 1.75rem;
  border-top: 1px solid var(--line);
}
.related > h2 {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.13em;
  color: var(--ink-3);
  font-weight: 640;
}
.related-all {
  margin-top: 1.1rem;
  font-size: 0.9375rem;
}

footer.site {
  max-width: var(--w);
  margin: 0 auto;
  padding: 2rem var(--pad) 4rem;
  border-top: 1px solid var(--line);
  font-size: 0.875rem;
  color: var(--ink-3);
}
.footer-note {
  margin-bottom: 0.6rem;
}
.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1.1rem;
}
.footer-nav a {
  color: var(--ink-3);
  text-decoration: none;
  border-bottom: 1px solid var(--line-2);
}
.footer-nav a:hover {
  color: var(--ink);
}

/* ---------- misc ---------- */

.page-404 h1 {
  font-family: var(--mono);
  font-size: 3.5rem;
  color: var(--accent);
}
.page-404 .card-list {
  margin-top: 2.5rem;
}

[dir="rtl"] .reasons li {
  border-inline-start: 2px solid var(--line-2);
}