/* Stackbox site — bithard.co/stackbox. No external requests: fonts and images are local. */
@font-face {
  font-family: "Montserrat";
  font-weight: 600;
  font-style: normal;
  font-display: swap;
  src: url("montserrat-semibold.woff2") format("woff2");
}

:root {
  --ink: #111827;
  --ink-2: #374151;
  --muted: #4B5563;
  --line: #E5E7EB;
  --bg: #FFFFFF;
  --soft: #F5F6FD;
  --indigo: #4F46E5;
  --indigo-soft: #EEF2FF;
  --indigo-pale: #E0E7FF;
  --display: "Montserrat", "Segoe UI", Roboto, system-ui, sans-serif;
  --body: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--body);
  font-size: 17px;
  line-height: 1.6;
}
a { color: var(--indigo); text-underline-offset: 2px; }
a:hover { color: #3730A3; }
a:focus-visible, button:focus-visible { outline: 2px solid var(--indigo); outline-offset: 3px; border-radius: 4px; }

.wrap {
  max-width: 1040px;
  margin: 0 auto;
  padding-left: max(20px, env(safe-area-inset-left));
  padding-right: max(20px, env(safe-area-inset-right));
}

/* Header */
.site-header { border-bottom: 1px solid var(--line); }
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding-block: 16px; flex-wrap: wrap; }
.brand { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; color: var(--ink); }
.brand img { width: 40px; height: 40px; border-radius: 10px; display: block; }
.nav { display: flex; gap: 22px; font-size: 15px; }
.nav a { color: var(--ink-2); text-decoration: none; }
.nav a:hover, .nav a[aria-current="page"] { color: var(--indigo); }

/* Wordmark: "Stackb" + mark + "x" */
.wordmark {
  font-family: var(--display);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--ink);
  white-space: nowrap;
  line-height: 1;
}
.wordmark svg { width: 0.62em; height: 0.62em; vertical-align: -0.04em; margin: 0 0.01em; }
.brand .wordmark { font-size: 24px; }

/* Hero */
.hero { padding-block: 72px 56px; background: linear-gradient(var(--soft), var(--soft)); }
.hero .wrap { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr); gap: 48px; align-items: center; }
.hero h1 { font-family: var(--display); font-weight: 600; font-size: clamp(34px, 5vw, 52px); line-height: 1.12; letter-spacing: -0.02em; margin: 0 0 18px; text-wrap: balance; }
.hero p.lead { font-size: 19px; color: var(--ink-2); margin: 0 0 28px; max-width: 34em; }
.appstore-badge { display: inline-block; line-height: 0; }
.appstore-badge img { display: block; height: 52px; width: auto; }
.get { display: flex; flex-wrap: wrap; align-items: center; gap: 14px 18px; }
.availability { display: inline-flex; align-items: center; gap: 10px; background: var(--bg); border: 1px solid var(--line); border-radius: 999px; padding: 8px 16px; font-size: 15px; color: var(--ink-2); }
.availability .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--indigo); }

/* Phone preview (static illustration of the Today screen) */
.phone {
  justify-self: center;
  width: 100%;
  max-width: 320px;
  background: var(--bg);
  border: 1px solid #D1D5DB;
  border-radius: 36px;
  padding: 28px 18px 22px;
  box-shadow: 0 24px 48px -24px rgba(17, 24, 39, 0.25);
}
.phone .wordmark { font-size: 18px; }
.phone h2 { font-family: var(--body); font-size: 26px; margin: 6px 0 14px; letter-spacing: -0.01em; }
.slot { display: flex; justify-content: space-between; font-size: 11px; font-weight: 700; letter-spacing: 0.06em; color: var(--muted); margin: 14px 2px 8px; }
.row { display: flex; align-items: center; gap: 10px; border: 1px solid var(--line); border-radius: 12px; padding: 9px 11px; margin-bottom: 7px; }
.row .pdot { width: 10px; height: 10px; border-radius: 50%; flex: none; }
.row .txt { flex: 1; min-width: 0; line-height: 1.3; }
.row .txt b { display: block; font-size: 13px; }
.row .txt span { font-size: 11px; color: var(--muted); }
.pill { font-size: 11px; font-weight: 600; border-radius: 999px; padding: 3px 9px; white-space: nowrap; }
.pill.taken { background: #ECFDF5; color: #047857; }
.pill.todo { background: var(--indigo); color: #FFFFFF; }

/* Sections */
section { padding-block: 64px; }
.section-title { font-family: var(--display); font-weight: 600; font-size: clamp(26px, 3.4vw, 34px); letter-spacing: -0.02em; margin: 0 0 10px; }
.section-intro { color: var(--muted); margin: 0 0 36px; max-width: 40em; }

.features { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.feature { border: 1px solid var(--line); border-radius: 16px; padding: 22px; }
.feature h3 { font-size: 18px; margin: 12px 0 6px; }
.feature p { margin: 0; color: var(--muted); font-size: 16px; }
.feature .icon { width: 40px; height: 40px; border-radius: 10px; background: var(--indigo-soft); display: grid; place-items: center; }
.feature .icon svg { width: 22px; height: 22px; stroke: var(--indigo); fill: none; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }

.slots { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.slots span { font-size: 14px; background: var(--soft); border: 1px solid var(--line); border-radius: 999px; padding: 4px 12px; color: var(--ink-2); }

.privacy-band { background: var(--ink); color: #F9FAFB; }
.privacy-band .section-title { color: #FFFFFF; }
.privacy-band p { color: #D1D5DB; max-width: 44em; }
.privacy-band ul { margin: 18px 0 0; padding: 0; list-style: none; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px 32px; }
.privacy-band li { padding-left: 26px; position: relative; color: #F3F4F6; }
.privacy-band li::before { content: ""; position: absolute; left: 0; top: 0.55em; width: 12px; height: 12px; border-radius: 50%; background: var(--indigo); box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.35); }
.privacy-band a { color: #C7D2FE; }

.disclaimer { background: var(--soft); border-radius: 16px; padding: 20px 22px; color: var(--ink-2); font-size: 16px; }

/* Text pages (privacy, support) */
.page { padding-block: 48px 72px; }
.page .wrap { max-width: 760px; }
.page h1 { font-family: var(--display); font-weight: 600; font-size: clamp(30px, 4vw, 40px); letter-spacing: -0.02em; margin: 0 0 6px; line-height: 1.15; }
.page .updated { color: var(--muted); margin: 0 0 32px; font-size: 15px; }
.page h2 { font-size: 21px; margin: 36px 0 8px; letter-spacing: -0.01em; }
.page p { margin: 0 0 14px; }
.page .note { color: var(--muted); font-size: 15px; border-top: 1px solid var(--line); padding-top: 18px; margin-top: 40px; }
.contact-card { border: 1px solid var(--line); border-radius: 16px; padding: 22px; margin: 8px 0 28px; }
.contact-card .email { font-size: 20px; font-weight: 600; }
details.faq { border-bottom: 1px solid var(--line); padding-block: 14px; }
details.faq summary { cursor: pointer; font-weight: 600; font-size: 17px; list-style: none; display: flex; justify-content: space-between; gap: 16px; }
details.faq summary::-webkit-details-marker { display: none; }
details.faq summary::after { content: "+"; color: var(--indigo); font-weight: 700; }
details.faq[open] summary::after { content: "–"; }
details.faq p { margin: 10px 0 0; color: var(--ink-2); }

/* Footer */
.site-footer { border-top: 1px solid var(--line); padding-block: 28px; font-size: 14px; color: var(--muted); }
.site-footer .wrap { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px 24px; }
.site-footer nav { display: flex; gap: 18px; flex-wrap: wrap; }
.site-footer a { color: var(--muted); }

@media (max-width: 860px) {
  .hero .wrap { grid-template-columns: minmax(0, 1fr); }
  .features { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 560px) {
  body { font-size: 16px; }
  .hero { padding-block: 48px 40px; }
  .features { grid-template-columns: minmax(0, 1fr); }
  .privacy-band ul { grid-template-columns: minmax(0, 1fr); }
  section { padding-block: 48px; }
}