/* SISR GitHub Pages — aligns with app GUI accents */
:root {
  --bg: #0f1114;
  --surface: #1a1a1a;
  --border: #2d2d2d;
  --text: #f4f4f5;
  --muted: #a8a8a8;
  --accent: #2563eb;
  --accent-dim: #1d4ed8;
  --danger: #f87171;
  --ok: #34d399;
  --font: "Segoe UI", system-ui, -apple-system, sans-serif;
  --mono: ui-monospace, "Cascadia Code", "SF Mono", Menlo, monospace;
  --radius: 10px;
  --max: 920px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(15, 17, 20, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.site-header__inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0.85rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--text);
  text-decoration: none;
}

.brand:hover {
  text-decoration: none;
  color: var(--text);
}

.brand__logo {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  display: block;
  flex-shrink: 0;
  object-fit: cover;
}

.hero__logo-wrap {
  margin: 0 0 1rem;
}

.hero__logo {
  width: 96px;
  height: 96px;
  border-radius: 20px;
  display: block;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  font-size: 0.95rem;
}

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

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

.nav a.nav__download {
  color: #2dd4bf;
  font-weight: 600;
}

.nav a.nav__download:hover {
  color: #5eead4;
}

main {
  max-width: var(--max);
  margin: 0 auto;
  padding: 2rem 1.25rem 4rem;
}

.hero {
  padding: 2.5rem 0 2rem;
}

.hero h1 {
  font-size: clamp(1.75rem, 4vw, 2.35rem);
  line-height: 1.2;
  margin: 0 0 0.75rem;
  font-weight: 800;
}

.lead {
  font-size: 1.125rem;
  color: var(--muted);
  max-width: 52ch;
  margin: 0 0 1.5rem;
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
}

.download-hint {
  margin: 0.65rem 0 0;
  font-size: 0.88rem;
  color: var(--muted);
  max-width: 52ch;
}

.get-started-advanced {
  margin: 1.25rem 0 0;
  font-size: 0.95rem;
  color: var(--muted);
  max-width: 60ch;
}

.download-inline {
  margin: 1rem 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
}

.download-inline .download-hint {
  margin: 0;
  flex: 1;
  min-width: min(100%, 16rem);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.65rem 1.1rem;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
}

.btn:hover {
  text-decoration: none;
}

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

.btn--primary:hover {
  background: var(--accent-dim);
  color: #fff;
}

.btn--download {
  background: linear-gradient(180deg, #14b8a6 0%, #0d9488 100%);
  color: #fff;
  border-color: #0f766e;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.35);
}

.btn--download:hover {
  background: linear-gradient(180deg, #2dd4bf 0%, #14b8a6 100%);
  color: #fff;
}

.btn--ghost {
  background: transparent;
  border-color: var(--border);
  color: var(--text);
}

.btn--ghost:hover {
  border-color: var(--accent);
  color: var(--text);
}

section {
  margin-top: 2.75rem;
}

section h2 {
  font-size: 1.35rem;
  margin: 0 0 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
}

section h3 {
  font-size: 1.1rem;
  margin: 1.5rem 0 0.5rem;
}

p {
  margin: 0.65rem 0;
}

ul {
  margin: 0.5rem 0 0.5rem 1.1rem;
  padding: 0;
}

li {
  margin: 0.35rem 0;
}

.card-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.1rem 1.15rem;
}

.card h3 {
  margin-top: 0;
  font-size: 1.05rem;
}

.card p {
  color: var(--muted);
  font-size: 0.95rem;
  margin: 0.5rem 0 0;
}

.callout {
  border-left: 4px solid var(--accent);
  background: var(--surface);
  padding: 0.85rem 1rem;
  border-radius: 0 var(--radius) var(--radius) 0;
  margin: 1rem 0;
  color: var(--muted);
  font-size: 0.95rem;
}

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

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
  margin: 1rem 0;
}

th,
td {
  border: 1px solid var(--border);
  padding: 0.55rem 0.65rem;
  text-align: left;
  vertical-align: top;
}

th {
  background: var(--surface);
  color: var(--muted);
  font-weight: 600;
}

code,
kbd {
  font-family: var(--mono);
  font-size: 0.88em;
  background: #111827;
  padding: 0.12em 0.35em;
  border-radius: 4px;
  border: 1px solid var(--border);
}

pre {
  background: #111827;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  overflow-x: auto;
  font-size: 0.85rem;
  line-height: 1.45;
}

pre code {
  border: 0;
  padding: 0;
  background: transparent;
}

.figure {
  margin: 1.25rem 0;
  padding: 1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.figure__title {
  font-weight: 700;
  margin: 0 0 0.75rem;
  font-size: 1rem;
}

.figure__caption {
  margin: 0.75rem 0 0;
  font-size: 0.9rem;
  color: var(--muted);
}

.figure__intro {
  margin: 0 0 1rem;
  font-size: 0.95rem;
  color: var(--muted);
}

.diagram-row {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  align-items: start;
}

.diagram-box {
  text-align: center;
}

.diagram-box svg {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 0 auto;
}

.diagram-label {
  font-size: 0.82rem;
  color: var(--muted);
  margin-top: 0.5rem;
}

.app-map {
  font-size: 0.8rem;
  color: var(--muted);
  display: inline-block;
  margin-top: 0.2rem;
  line-height: 1.45;
}

.badge {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 0.2rem 0.45rem;
  border-radius: 4px;
  background: #1e3a5f;
  color: #93c5fd;
  vertical-align: middle;
}

/* Sample output screenshots (marketing / guide) */
.samples-showcase {
  margin-top: 2.5rem;
}

.samples-showcase__lead {
  color: var(--muted);
  font-size: 1.05rem;
  max-width: 62ch;
  margin: 0 0 1.25rem;
}

.sample-grid {
  display: grid;
  gap: 1.25rem 1.5rem;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  align-items: start;
}

.sample-figure {
  margin: 0;
  padding: 0;
}

.sample-figure img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: #111827;
}

.sample-figure figcaption {
  margin: 0.55rem 0 0;
  font-size: 0.88rem;
  color: var(--muted);
  line-height: 1.45;
}

.sample-figure figcaption strong {
  color: var(--text);
  display: block;
  font-size: 0.92rem;
  margin-bottom: 0.2rem;
}

.sample-grid--compact {
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  max-width: 100%;
}

.sample-realshot {
  margin-top: 1.5rem;
}

.site-footer {
  max-width: var(--max);
  margin: 0 auto;
  padding: 2rem 1.25rem 3rem;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.9rem;
}

@media (max-width: 520px) {
  .site-header__inner {
    flex-direction: column;
    align-items: flex-start;
  }
}