/* =========================================================
   b-oss website — shared styles
   Pulls from the app's design tokens: green-800 top bar,
   Helvetica, clean white surfaces, subtle borders.
   ========================================================= */

:root {
  --green-900: #143729;
  --green-800: #1f4d3a;
  --green-700: #2a6347;
  --green-100: #eef2ee;
  --green-50: #f6f8f6;
  --ink: #111111;
  --ink-2: #2a2a2a;
  --muted: #6b7280;
  --muted-2: #9ca3af;
  --line: #e5e7eb;
  --line-2: #eeeeee;
  --bg: #ffffff;
  --bg-alt: #fafafa;
  --radius: 6px;
  --radius-lg: 10px;
  --shadow-soft: 0 1px 2px rgba(15, 23, 32, 0.04), 0 8px 24px rgba(15, 23, 32, 0.06);
  --font: 'Helvetica Neue', Helvetica, Arial, sans-serif;
}

* {
  box-sizing: border-box;
}
html,
body {
  margin: 0;
  padding: 0;
}
body {
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  font-size: 15px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--green-800);
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}

img {
  max-width: 100%;
  display: block;
}

/* ---------- Top bar (matches the app) ---------- */
.topbar {
  height: 56px;
  background: var(--green-800);
  color: #fff;
  display: flex;
  align-items: center;
  padding: 0 28px;
  position: sticky;
  top: 0;
  z-index: 10;
}
.topbar-inner {
  width: 100%;
  max-width: 1080px;
  margin: 0 auto;
  display: flex;
  align-items: center;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: #fff;
  font-weight: 700;
  font-size: 17px;
  letter-spacing: -0.01em;
}
.brand:hover {
  text-decoration: none;
}
.brand img {
  width: 28px;
  height: 28px;
  border-radius: 6px;
}

.nav {
  margin-left: auto;
  display: flex;
  gap: 4px;
  align-items: center;
}
.nav a {
  color: rgba(255, 255, 255, 0.82);
  font-size: 13.5px;
  padding: 8px 14px;
  border-radius: 7px;
  transition:
    background 120ms,
    color 120ms;
}
.nav a:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.08);
  text-decoration: none;
}
.nav a.active {
  color: #fff;
  background: rgba(255, 255, 255, 0.12);
}

/* ---------- Page container ---------- */
.page {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 28px;
}
.page.narrow {
  max-width: 720px;
}

/* ---------- Hero ---------- */
.hero {
  padding: 44px 0 28px;
  text-align: center;
}
.hero-icon {
  width: 64px;
  height: 64px;
  border-radius: 14px;
  margin: 0 auto 14px;
  display: block;
}
.hero h1 {
  margin: 0 0 8px;
  font-size: 38px;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.1;
}
.hero .lead {
  margin: 0 auto;
  max-width: 620px;
  font-size: 16px;
  color: var(--muted);
  line-height: 1.5;
}

/* ---------- Section ---------- */
section.block {
  padding: 32px 0;
  border-top: 1px solid var(--line-2);
}
section.block:first-of-type {
  border-top: none;
}

.section-eyebrow {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 600;
  color: var(--muted);
  margin: 0 0 10px;
}
.section-title {
  margin: 0 0 14px;
  font-size: 30px;
  font-weight: 700;
  letter-spacing: -0.015em;
  line-height: 1.15;
}
.section-lead {
  margin: 0;
  color: var(--muted);
  font-size: 16px;
  max-width: 640px;
}

/* ---------- App card (homepage) ---------- */
.app-card {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 44px;
  align-items: center;
  padding: 32px 0;
  border-top: 1px solid var(--line-2);
}
.app-card-meta {
  min-width: 0;
}
.app-card-head {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 12px;
}
.app-card-head img {
  width: 56px;
  height: 56px;
  border-radius: 12px;
}
.app-card-head h2 {
  margin: 0;
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -0.015em;
}
.app-card-head .tagline {
  font-size: 13px;
  color: var(--muted);
  margin-top: 2px;
}
.app-card p.summary {
  margin: 0 0 14px;
  color: var(--ink-2);
  font-size: 15.5px;
  line-height: 1.55;
}
.feature-list {
  list-style: none;
  padding: 0;
  margin: 0 0 18px;
  display: grid;
  gap: 7px;
}
.feature-list li {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  font-size: 14.5px;
  color: var(--ink-2);
}
.feature-list .tick {
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background-color: var(--green-100);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='10' viewBox='0 0 10 10'%3E%3Cpath d='M1.5 5.2 4 7.7l4.5-5' stroke='%231f4d3a' stroke-width='1.6' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: center;
  background-size: 10px 10px;
  margin-top: 2px;
}

/* ---------- Shot (app screenshot placeholder) ---------- */
.shot {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--bg-alt);
  overflow: hidden;
  box-shadow: var(--shadow-soft);
  aspect-ratio: 16 / 10;
  position: relative;
}
.shot img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top left;
  display: block;
}
.shot.placeholder {
  background-image: repeating-linear-gradient(135deg, #f3f5f3 0 12px, #fafbfa 12px 24px);
  display: flex;
  align-items: center;
  justify-content: center;
}
.shot.placeholder .label {
  font-family: ui-monospace, 'SF Mono', Menlo, monospace;
  font-size: 12px;
  color: var(--muted);
  background: #fff;
  padding: 6px 12px;
  border: 1px solid var(--line);
  border-radius: 6px;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 38px;
  padding: 0 18px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
  font-family: inherit;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  text-decoration: none;
  transition:
    background 120ms,
    border-color 120ms,
    color 120ms;
}
.btn:hover {
  background: var(--green-50);
  border-color: rgba(31, 77, 58, 0.25);
  text-decoration: none;
}
.btn.primary {
  background: var(--green-800);
  border-color: var(--green-800);
  color: #fff;
}
.btn.primary:hover {
  background: var(--green-700);
  border-color: var(--green-700);
}
.btn.disabled,
.btn[aria-disabled='true'] {
  opacity: 0.45;
  pointer-events: none;
  cursor: default;
}
.btn-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

/* ---------- App page: three big links ---------- */
.tri-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 16px;
  padding: 8px 0 20px;
}
.tri-link {
  flex: 0 0 calc((100% - 32px) / 3);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 26px 22px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fff;
  color: var(--ink);
  transition:
    transform 160ms cubic-bezier(0.22, 0.61, 0.36, 1),
    border-color 160ms,
    box-shadow 160ms,
    background 160ms;
}
.tri-link:hover {
  border-color: rgba(31, 77, 58, 0.3);
  background: var(--green-50);
  box-shadow: var(--shadow-soft);
  transform: translateY(-2px);
  text-decoration: none;
}
.tri-link .ico {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: var(--green-100);
  color: var(--green-800);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 12px;
}
.tri-link h3 {
  margin: 0 0 6px;
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -0.01em;
}
.tri-link p {
  margin: 0;
  color: var(--muted);
  font-size: 13.5px;
  line-height: 1.5;
}

/* ---------- Form ---------- */
.form {
  display: grid;
  gap: 16px;
  margin: 28px 0 0;
}
.form-row {
  display: grid;
  gap: 6px;
}
.form-row label {
  font-size: 13px;
  font-weight: 600;
  color: var(--ink-2);
}
.form-row .hint {
  font-size: 12px;
  color: var(--muted);
  font-weight: 400;
}
.input,
.textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 12px;
  background: #fff;
  font-family: inherit;
  font-size: 14px;
  color: var(--ink);
  outline: none;
  transition:
    border-color 120ms,
    box-shadow 120ms;
}
.textarea {
  resize: vertical;
  min-height: 140px;
  line-height: 1.55;
}
.input:focus,
.textarea:focus {
  border-color: var(--green-700);
  box-shadow: 0 0 0 3px rgba(31, 77, 58, 0.12);
}
.form-status {
  font-size: 13.5px;
  padding: 10px 14px;
  border-radius: 8px;
  display: none;
}
.form-status.ok {
  display: block;
  background: #eaf6ef;
  color: #1b6b46;
  border: 1px solid #cfe7d8;
}
.form-status.err {
  display: block;
  background: #fdf1f0;
  color: #8a2b2b;
  border: 1px solid #f3d3d0;
}
.form-status.sending {
  display: block;
  background: var(--green-50);
  color: var(--ink-2);
  border: 1px solid var(--line);
}

/* ---------- Prose (intro paragraphs, user guide) ---------- */
.prose {
  font-size: 16px;
  line-height: 1.65;
  color: var(--ink-2);
}
.prose p {
  margin: 0 0 16px;
}
.prose h2 {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin: 36px 0 12px;
  color: var(--ink);
}
.prose h3 {
  font-size: 17px;
  font-weight: 600;
  margin: 28px 0 8px;
  color: var(--ink);
}
.prose ul,
.prose ol {
  padding-left: 22px;
  margin: 0 0 16px;
}
.prose li {
  margin: 4px 0;
}
.prose code {
  font-family: ui-monospace, 'SF Mono', Menlo, monospace;
  font-size: 13.5px;
  background: var(--green-50);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 1px 6px;
}

/* ---------- Guide-specific prose extras ---------- */
.prose table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0 24px;
  font-size: 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
}
.prose table th,
.prose table td {
  text-align: left;
  vertical-align: top;
  padding: 10px 14px;
  border-bottom: 1px solid var(--line-2);
  line-height: 1.5;
}
.prose table th {
  background: var(--green-50);
  font-weight: 600;
  color: var(--ink);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.prose table tr:last-child td {
  border-bottom: none;
}
.prose table td:first-child {
  white-space: nowrap;
  font-weight: 500;
  color: var(--ink);
}

.prose blockquote {
  margin: 18px 0;
  padding: 12px 16px;
  border-left: 3px solid var(--green-700);
  background: var(--green-50);
  border-radius: 0 8px 8px 0;
  color: var(--ink-2);
  font-size: 14.5px;
}
.prose blockquote p {
  margin: 0;
}
.prose blockquote strong {
  color: var(--green-900);
}

.prose figure {
  margin: 18px 0 24px;
  padding: 0;
}
.prose figure img {
  width: auto;
  max-width: 100%;
  margin-left: auto;
  margin-right: auto;
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow-soft);
  background: var(--bg-alt);
  cursor: pointer;
}

/* ---------- Image lightbox ---------- */
#img-lightbox {
  padding: 0;
  border: none;
  border-radius: 12px;
  background: transparent;
  max-width: 92vw;
  max-height: 92vh;
  box-shadow: 0 8px 48px rgba(0, 0, 0, 0.45);
}
#img-lightbox::backdrop {
  background: rgba(0, 0, 0, 0.72);
}
#img-lightbox img {
  display: block;
  max-width: 92vw;
  max-height: 88vh;
  border-radius: 10px;
  object-fit: contain;
}
#img-lightbox .lightbox-close {
  position: absolute;
  top: 10px;
  right: 12px;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: none;
  background: rgba(0, 0, 0, 0.55);
  color: #fff;
  font-size: 18px;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}
#img-lightbox .lightbox-close:hover {
  background: rgba(0, 0, 0, 0.8);
}
.prose figure figcaption {
  margin-top: 8px;
  font-size: 12.5px;
  color: var(--muted);
  text-align: center;
  font-style: italic;
}

/* TOC */
.toc {
  margin: 24px 0 36px;
  padding: 18px 22px;
  background: var(--green-50);
  border: 1px solid var(--line);
  border-radius: 10px;
}
.toc-title {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 600;
  color: var(--muted);
  margin: 0 0 10px;
}
.toc ol {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: toc;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4px 24px;
}
.toc ol li {
  counter-increment: toc;
  font-size: 14px;
  line-height: 1.6;
}
.toc ol li::before {
  content: counter(toc) '.';
  color: var(--muted);
  margin-right: 8px;
  font-variant-numeric: tabular-nums;
}
.toc a {
  color: var(--ink-2);
}
.toc a:hover {
  color: var(--green-800);
}

@media (max-width: 640px) {
  .toc ol {
    grid-template-columns: 1fr;
  }
}

/* ---------- CTA band ---------- */
.cta-band {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
  background: var(--green-50);
  border: 1px solid var(--line-2);
  border-radius: var(--radius-lg);
  padding: 28px 32px;
  margin: 8px 0 48px;
}
.cta-band p {
  margin: 0;
  font-size: 16px;
  font-weight: 500;
  color: var(--ink);
}

/* ---------- Footer ---------- */
.footer {
  margin-top: 48px;
  border-top: 1px solid var(--line-2);
  padding: 20px 0;
  color: var(--muted);
  font-size: 12.5px;
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.footer a {
  color: var(--muted);
}
.footer a:hover {
  color: var(--ink-2);
}

/* ---------- Responsive ---------- */
@media (max-width: 820px) {
  .hero {
    padding: 32px 0 20px;
  }
  .hero h1 {
    font-size: 30px;
  }
  .app-card {
    grid-template-columns: 1fr;
    gap: 22px;
    padding: 28px 0;
  }
  .tri-link {
    flex: 0 0 100%;
  }
  .cta-band {
    flex-direction: column;
    align-items: flex-start;
  }
  .section-title {
    font-size: 22px;
  }
}
@media (max-width: 520px) {
  .topbar {
    padding: 0 16px;
  }
  .page {
    padding: 0 16px;
  }
  .nav a {
    padding: 8px 10px;
    font-size: 13px;
  }
}