/* Slingshot website styles. No external fonts or trackers: system fonts only. */
:root {
  --bg: #f6f6fb;
  --surface: #ffffff;
  --surface-2: #f0f0f7;
  --text: #14142b;
  --muted: #55556d;
  --border: #e2e2ee;
  --accent: #5b4bff;
  --accent-hover: #4a3be6;
  --accent-text: #ffffff;
  --accent-soft: #eeebff;
  --ok: #0b7a55;
  --ok-soft: #e3f6ee;
  --danger: #c4261b;
  --danger-soft: #fdecea;
  --warn-soft: #fff6e0;
  --warn-text: #7a5300;
  --shadow: 0 1px 2px rgba(20, 20, 43, 0.06), 0 8px 24px rgba(20, 20, 43, 0.06);
  --radius: 16px;
  --radius-sm: 10px;
  --focus: 0 0 0 3px #ffffff, 0 0 0 5px #5b4bff;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d0d17;
    --surface: #171726;
    --surface-2: #1f1f33;
    --text: #f2f2fa;
    --muted: #a8a8c0;
    --border: #2c2c44;
    --accent: #8b7fff;
    --accent-hover: #a097ff;
    --accent-text: #0d0d17;
    --accent-soft: #24214a;
    --ok: #4ad6a0;
    --ok-soft: #12302a;
    --danger: #ff8a80;
    --danger-soft: #3a1717;
    --warn-soft: #33290f;
    --warn-text: #ffd27a;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 8px 24px rgba(0, 0, 0, 0.3);
    --focus: 0 0 0 3px #0d0d17, 0 0 0 5px #8b7fff;
    color-scheme: dark;
  }
}

* {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  font-size: 16px;
  line-height: 1.55;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: var(--accent);
  text-underline-offset: 2px;
}

a:hover {
  color: var(--accent-hover);
}

:focus-visible {
  outline: none;
  box-shadow: var(--focus);
  border-radius: 6px;
}

.skip {
  position: absolute;
  left: -9999px;
  top: 8px;
  background: var(--surface);
  padding: 8px 12px;
  border-radius: 8px;
  z-index: 10;
}

.skip:focus {
  left: 8px;
}

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

/* ---------- header / footer ---------- */
.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  max-width: 1080px;
  width: 100%;
  margin: 0 auto;
  padding: 18px 20px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 750;
  font-size: 20px;
  letter-spacing: -0.01em;
  color: var(--text);
  text-decoration: none;
}

.brand:hover {
  color: var(--text);
}

.brand svg {
  width: 32px;
  height: 32px;
  flex: none;
}

.nav {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.nav a {
  color: var(--muted);
  text-decoration: none;
  padding: 8px 10px;
  border-radius: 8px;
  font-weight: 550;
  font-size: 15px;
}

.nav a:hover,
.nav a[aria-current='page'] {
  color: var(--text);
  background: var(--surface-2);
}

.nav a.donate {
  color: var(--text);
  border: 1px solid var(--border);
  background: var(--surface);
}

.nav a.donate .heart {
  color: #e5484d;
}

main {
  flex: 1;
  width: 100%;
  max-width: 1080px;
  margin: 0 auto;
  padding: 8px 20px 48px;
}

.site-footer {
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 14px;
}

.site-footer .inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 24px 20px 32px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  justify-content: space-between;
  align-items: center;
}

.site-footer nav {
  display: flex;
  gap: 6px 16px;
  flex-wrap: wrap;
}

.site-footer a {
  color: var(--muted);
}

/* ---------- hero ---------- */
.hero {
  display: grid;
  grid-template-columns: 1fr minmax(320px, 480px);
  gap: 40px;
  align-items: start;
  padding-top: 24px;
}

.hero h1 {
  font-size: clamp(34px, 5vw, 52px);
  line-height: 1.08;
  letter-spacing: -0.03em;
  margin: 12px 0 16px;
}

.hero .lead {
  font-size: 19px;
  color: var(--muted);
  max-width: 34em;
  margin: 0 0 24px;
}

.pills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 28px;
  padding: 0;
  list-style: none;
}

.pills li {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 6px 12px;
  font-size: 14px;
  font-weight: 550;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.pills svg {
  width: 16px;
  height: 16px;
  color: var(--ok);
}

.eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 650;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-soft);
  padding: 4px 10px;
  border-radius: 999px;
}

/* ---------- cards ---------- */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 22px;
}

.card h2 {
  margin: 0 0 4px;
  font-size: 20px;
  letter-spacing: -0.01em;
}

.card .sub {
  margin: 0 0 16px;
  color: var(--muted);
  font-size: 15px;
}

/* ---------- drop zone ---------- */
.drop {
  border: 2px dashed var(--border);
  border-radius: var(--radius-sm);
  padding: 28px 16px;
  text-align: center;
  background: var(--surface-2);
  transition: border-color 0.15s, background 0.15s;
}

.drop.over {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.drop .icon {
  width: 44px;
  height: 44px;
  color: var(--accent);
  margin: 0 auto 8px;
  display: block;
}

.drop p {
  margin: 0 0 14px;
  color: var(--muted);
}

.drop strong {
  color: var(--text);
}

.row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: center;
}

/* ---------- buttons ---------- */
.btn {
  appearance: none;
  border: 1px solid transparent;
  border-radius: 10px;
  padding: 11px 18px;
  font: inherit;
  font-weight: 650;
  font-size: 15px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  text-decoration: none;
  min-height: 44px;
  line-height: 1.2;
}

.btn svg {
  width: 18px;
  height: 18px;
  flex: none;
}

.btn-primary {
  background: var(--accent);
  color: var(--accent-text);
}

.btn-primary:hover {
  background: var(--accent-hover);
  color: var(--accent-text);
}

.btn-secondary {
  background: var(--surface);
  color: var(--text);
  border-color: var(--border);
}

.btn-secondary:hover {
  background: var(--surface-2);
  color: var(--text);
}

.btn-ghost {
  background: transparent;
  color: var(--muted);
  padding: 8px 10px;
  min-height: 36px;
}

.btn-ghost:hover {
  color: var(--text);
  background: var(--surface-2);
}

.btn-danger {
  background: var(--danger-soft);
  color: var(--danger);
}

.btn-block {
  width: 100%;
}

.btn-big {
  font-size: 17px;
  padding: 14px 22px;
  min-height: 52px;
}

.btn[disabled] {
  opacity: 0.55;
  cursor: not-allowed;
}

/* ---------- file list ---------- */
.files {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  max-height: 260px;
  overflow: auto;
}

.files li {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  border-bottom: 1px solid var(--border);
  min-width: 0;
}

.files li:last-child {
  border-bottom: 0;
}

.files .ficon {
  width: 20px;
  height: 20px;
  color: var(--muted);
  flex: none;
}

.files .name {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.files .size {
  color: var(--muted);
  font-size: 14px;
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
}

.files button.remove,
.files button.get {
  flex: none;
}

.summary {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 12px;
  font-weight: 600;
  gap: 10px;
  flex-wrap: wrap;
}

.summary .muted {
  font-weight: 450;
}

.muted {
  color: var(--muted);
}

/* ---------- options ---------- */
.options {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin: 16px 0;
}

label.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
}

select,
input[type='text'],
input[type='url'],
textarea {
  font: inherit;
  font-size: 15px;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 12px;
  min-height: 44px;
  width: 100%;
}

textarea {
  min-height: 90px;
  resize: vertical;
}

/* ---------- progress ---------- */
.progress-wrap {
  margin: 8px 0 0;
}

.bar {
  height: 10px;
  background: var(--surface-2);
  border-radius: 999px;
  overflow: hidden;
  border: 1px solid var(--border);
}

.bar > span {
  display: block;
  height: 100%;
  width: 0%;
  background: var(--accent);
  border-radius: 999px;
  transition: width 0.25s ease;
}

.progress-text {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  font-size: 14px;
  color: var(--muted);
  margin-top: 8px;
  font-variant-numeric: tabular-nums;
  flex-wrap: wrap;
}

.big-number {
  font-size: 30px;
  font-weight: 750;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
}

/* ---------- messages ---------- */
.notice {
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  font-size: 15px;
  margin: 12px 0 0;
}

.notice.error {
  background: var(--danger-soft);
  color: var(--danger);
}

.notice.ok {
  background: var(--ok-soft);
  color: var(--ok);
}

.notice.warn {
  background: var(--warn-soft);
  color: var(--warn-text);
}

.notice.info {
  background: var(--accent-soft);
  color: var(--text);
}

/* ---------- link result ---------- */
.link-box {
  display: flex;
  gap: 8px;
  margin: 12px 0;
}

.link-box input {
  flex: 1;
  min-width: 0;
  font-family: ui-monospace, 'SF Mono', Menlo, Consolas, monospace;
  font-size: 14px;
}

.done-mark {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: var(--ok-soft);
  color: var(--ok);
  display: grid;
  place-items: center;
  margin-bottom: 10px;
}

.done-mark svg {
  width: 28px;
  height: 28px;
}

.facts {
  list-style: none;
  padding: 0;
  margin: 12px 0;
  font-size: 14px;
  color: var(--muted);
  display: grid;
  gap: 4px;
}

/* ---------- sections ---------- */
.section {
  margin-top: 72px;
}

.section h2 {
  font-size: clamp(26px, 3.4vw, 34px);
  letter-spacing: -0.02em;
  margin: 0 0 8px;
}

.section > p.lead {
  color: var(--muted);
  font-size: 18px;
  margin: 0 0 24px;
  max-width: 40em;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.feature {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}

.feature h3 {
  margin: 10px 0 6px;
  font-size: 17px;
}

.feature p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
}

.feature .ficon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--accent-soft);
  color: var(--accent);
  display: grid;
  place-items: center;
}

.feature .ficon svg {
  width: 22px;
  height: 22px;
}

.app-promo {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 32px;
  align-items: center;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 22px;
  padding: 32px;
}

.app-promo ul {
  padding-left: 20px;
  color: var(--muted);
}

.app-promo li {
  margin: 4px 0;
}

.mock {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 16px;
  font-size: 14px;
}

.mock .dev {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 12px;
  margin-top: 8px;
}

.mock .dev svg {
  width: 22px;
  height: 22px;
  color: var(--accent);
}

.mock .dev .grow {
  flex: 1;
}

.mock .tag {
  font-size: 12px;
  color: var(--muted);
}

.steps {
  counter-reset: step;
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.steps li {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}

.steps li::before {
  counter-increment: step;
  content: counter(step);
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--accent);
  color: var(--accent-text);
  font-weight: 750;
  margin-bottom: 10px;
}

.steps h3 {
  margin: 0 0 4px;
  font-size: 17px;
}

.steps p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
}

.faq details {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  margin-bottom: 10px;
}

.faq summary {
  cursor: pointer;
  font-weight: 650;
}

.faq details p {
  color: var(--muted);
  margin: 10px 0 0;
}

.donate-band {
  margin-top: 72px;
  text-align: center;
  color: var(--muted);
  font-size: 15px;
}

/* ---------- article pages ---------- */
.prose {
  max-width: 720px;
  margin: 0 auto;
}

.prose h1 {
  font-size: clamp(30px, 4vw, 40px);
  letter-spacing: -0.02em;
  margin: 24px 0 8px;
}

.prose h2 {
  margin-top: 36px;
  font-size: 22px;
}

.prose p,
.prose li {
  color: var(--text);
}

.prose .updated {
  color: var(--muted);
  font-size: 14px;
}

.prose table {
  border-collapse: collapse;
  width: 100%;
  font-size: 15px;
  margin: 12px 0;
}

.prose th,
.prose td {
  text-align: left;
  border-bottom: 1px solid var(--border);
  padding: 8px 6px;
  vertical-align: top;
}

/* ---------- download page ---------- */
.dl-hero {
  text-align: center;
  max-width: 720px;
  margin: 24px auto 0;
}

.dl-hero h1 {
  font-size: clamp(32px, 4.5vw, 46px);
  letter-spacing: -0.03em;
  margin: 12px 0 8px;
}

.dl-hero .lead {
  color: var(--muted);
  font-size: 18px;
  margin: 0 0 24px;
}

.dl-main {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

.dl-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 40px;
}

.os-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.os-card.current {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent);
}

.os-card h2 {
  margin: 0;
  font-size: 19px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.os-card .meta {
  color: var(--muted);
  font-size: 13px;
  word-break: break-all;
}

.help {
  margin-top: 40px;
}

.help ol {
  padding-left: 22px;
}

.help li {
  margin: 6px 0;
}

kbd {
  font-family: ui-monospace, Menlo, Consolas, monospace;
  font-size: 0.9em;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 1px 6px;
}

code {
  font-family: ui-monospace, Menlo, Consolas, monospace;
  font-size: 0.92em;
  background: var(--surface-2);
  border-radius: 6px;
  padding: 1px 5px;
  word-break: break-word;
}

/* ---------- receive page ---------- */
.receive {
  max-width: 620px;
  margin: 24px auto 0;
}

.receive h1 {
  font-size: clamp(26px, 4vw, 34px);
  letter-spacing: -0.02em;
  margin: 0 0 4px;
}

.report-box {
  margin-top: 16px;
}

.hidden {
  display: none !important;
}

/* small helpers (inline styles are blocked by the security policy) */
.row.start {
  justify-content: flex-start;
}

.small-note {
  font-size: 14px;
  margin: 14px 0 0;
}

.inline-icon {
  vertical-align: -2px;
}

.mt {
  margin-top: 18px;
}

.mt-s {
  margin-top: 12px;
}

.mb {
  margin: 0 0 12px;
}

.h-sm {
  font-size: 22px !important;
}

.muted.big {
  font-size: 17px;
}

.mock .btn {
  min-height: 34px;
  padding: 6px 12px;
}

.center {
  text-align: center;
}

.qr-box {
  margin: 4px 0 14px;
  font-size: 14px;
}

.qr-box summary {
  cursor: pointer;
  color: var(--accent);
  font-weight: 600;
}

.qr-box img {
  display: block;
  margin-top: 10px;
  width: 200px;
  height: 200px;
  background: #fff;
  border-radius: 10px;
  padding: 6px;
  image-rendering: pixelated;
}

.spinner {
  width: 22px;
  height: 22px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  display: inline-block;
  vertical-align: middle;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    transition: none !important;
    animation-duration: 2s !important;
  }
}

/* ---------- responsive ---------- */
@media (max-width: 880px) {
  .hero,
  .app-promo {
    grid-template-columns: 1fr;
  }
  .grid-3,
  .steps,
  .dl-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 520px) {
  .site-header {
    padding: 14px 16px;
  }
  main {
    padding: 4px 16px 40px;
  }
  .nav a.hide-sm {
    display: none;
  }
  .options {
    grid-template-columns: 1fr;
  }
  .card {
    padding: 18px;
  }
  .app-promo {
    padding: 20px;
  }
  .link-box {
    flex-direction: column;
  }
  .hero .lead {
    font-size: 17px;
  }
}