/* ==========================================================================
   OsdagBridge Documentation Site — shared styles
   ========================================================================== */

:root {
  --color-bg: #f7f8fb;
  --color-bg-alt: #ffffff;
  --color-surface: #ffffff;
  --color-border: #e2e5ec;
  --color-text: #1c2230;
  --color-text-muted: #5b6273;
  --color-brand: #2f5fd6;
  --color-brand-dark: #1f3f9c;
  --color-brand-contrast: #ffffff;
  --color-accent: #16a085;
  --color-code-bg: #eef1f8;
  --color-header-bg: rgba(255, 255, 255, 0.9);
  --shadow-sm: 0 1px 2px rgba(20, 24, 38, 0.06);
  --shadow-md: 0 8px 24px rgba(20, 24, 38, 0.08);
  --radius: 10px;
  --max-width: 1120px;
}

:root[data-theme="dark"] {
  --color-bg: #10131c;
  --color-bg-alt: #161a26;
  --color-surface: #1a1f2c;
  --color-border: #2a2f3d;
  --color-text: #e8eaf1;
  --color-text-muted: #a3a9bb;
  --color-brand: #6c8fff;
  --color-brand-dark: #97afff;
  --color-brand-contrast: #0c0e14;
  --color-accent: #2ed3a8;
  --color-code-bg: #1f2430;
  --color-header-bg: rgba(16, 19, 28, 0.85);
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.45);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --color-bg: #10131c;
    --color-bg-alt: #161a26;
    --color-surface: #1a1f2c;
    --color-border: #2a2f3d;
    --color-text: #e8eaf1;
    --color-text-muted: #a3a9bb;
    --color-brand: #6c8fff;
    --color-brand-dark: #97afff;
    --color-brand-contrast: #0c0e14;
    --color-accent: #2ed3a8;
    --color-code-bg: #1f2430;
    --color-header-bg: rgba(16, 19, 28, 0.85);
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.45);
  }
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Segoe UI", -apple-system, BlinkMacSystemFont, Roboto, Helvetica, Arial, sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  transition: background-color 0.2s ease, color 0.2s ease;
  line-height: 1.6;
}

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

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

a:hover {
  text-decoration: underline;
}

code, pre {
  font-family: "Cascadia Code", "Fira Code", Consolas, Menlo, monospace;
}

code {
  background: var(--color-code-bg);
  padding: 0.15em 0.4em;
  border-radius: 5px;
  font-size: 0.92em;
}

pre {
  background: var(--color-code-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1rem 1.1rem;
  overflow-x: auto;
}

pre code {
  background: none;
  padding: 0;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ---------------------------------- Navbar -------------------------------- */

.navbar {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(8px);
  background: var(--color-header-bg);
  border-bottom: 1px solid var(--color-border);
}

.nav-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0.75rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--color-text);
}

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

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  font-weight: 500;
}

.nav-links a {
  color: var(--color-text-muted);
  white-space: nowrap;
}

.nav-links a.active,
.nav-links a:hover {
  color: var(--color-brand);
  text-decoration: none;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.icon-btn {
  background: none;
  border: 1px solid var(--color-border);
  color: var(--color-text);
  border-radius: 8px;
  width: 2.25rem;
  height: 2.25rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1rem;
  transition: background-color 0.15s ease, transform 0.15s ease;
}

.icon-btn:hover {
  background: var(--color-code-bg);
}

.nav-toggle {
  display: none;
}

/* --------------------------------- Buttons -------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.7rem 1.4rem;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.95rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.12s ease, box-shadow 0.12s ease, background-color 0.12s ease;
}

.btn:hover {
  text-decoration: none;
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--color-brand);
  color: var(--color-brand-contrast);
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  background: var(--color-brand-dark);
}

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

.btn-secondary:hover {
  border-color: var(--color-brand);
}

.btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
}

/* ---------------------------------- Hero ---------------------------------- */

.hero {
  padding: 4.5rem 0 3.5rem;
  text-align: center;
}

.hero .eyebrow {
  display: inline-block;
  background: var(--color-code-bg);
  color: var(--color-brand);
  padding: 0.3rem 0.85rem;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: 1.25rem;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3.1rem);
  margin: 0 0 1rem;
  letter-spacing: -0.02em;
}

.hero p.lead {
  font-size: 1.15rem;
  color: var(--color-text-muted);
  max-width: 640px;
  margin: 0 auto 2rem;
}

.hero .btn-group {
  justify-content: center;
}

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

.page-header {
  padding: 3rem 0 1rem;
  text-align: center;
}

.page-header h1 {
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  margin: 0 0 0.75rem;
}

.page-header p {
  color: var(--color-text-muted);
  max-width: 620px;
  margin: 0 auto;
}

/* --------------------------------- Sections -------------------------------- */

section {
  padding: 3rem 0;
}

section.alt {
  background: var(--color-bg-alt);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.section-title {
  text-align: center;
  margin-bottom: 2.5rem;
}

.section-title h2 {
  font-size: clamp(1.6rem, 3.5vw, 2.1rem);
  margin: 0 0 0.6rem;
}

.section-title p {
  color: var(--color-text-muted);
  max-width: 560px;
  margin: 0 auto;
}

/* ----------------------------------- Grid ---------------------------------- */

.grid {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.6rem;
  box-shadow: var(--shadow-sm);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.1rem;
}

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

/* ------------------------------- Screenshots ------------------------------- */

.screenshot-placeholder {
  aspect-ratio: 16 / 10;
  border: 1px dashed var(--color-border);
  border-radius: var(--radius);
  background: var(--color-code-bg);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  color: var(--color-text-muted);
  text-align: center;
  padding: 1rem;
}

.screenshot-placeholder span.label {
  font-weight: 600;
  color: var(--color-text);
}

/* ------------------------------- Install steps ------------------------------ */

.steps {
  counter-reset: step;
  list-style: none;
  padding: 0;
  margin: 0;
}

.steps li {
  position: relative;
  padding: 0 0 1.75rem 3rem;
  border-left: 2px solid var(--color-border);
  margin-left: 1rem;
}

.steps li:last-child {
  border-color: transparent;
  padding-bottom: 0;
}

.steps li::before {
  counter-increment: step;
  content: counter(step);
  position: absolute;
  left: -1.1rem;
  top: 0;
  width: 2.1rem;
  height: 2.1rem;
  border-radius: 50%;
  background: var(--color-brand);
  color: var(--color-brand-contrast);
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
}

.steps h3 {
  margin: 0 0 0.4rem;
  font-size: 1.05rem;
}

.steps p {
  margin: 0 0 0.6rem;
  color: var(--color-text-muted);
}

/* ------------------------------------ Tabs ---------------------------------- */

.tabs {
  display: flex;
  gap: 0.5rem;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

.tab-btn {
  background: none;
  border: none;
  padding: 0.7rem 1.1rem;
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--color-text-muted);
  cursor: pointer;
  border-bottom: 2px solid transparent;
}

.tab-btn.active {
  color: var(--color-brand);
  border-color: var(--color-brand);
}

.tab-panel {
  display: none;
}

.tab-panel.active {
  display: block;
}

/* ------------------------------------ FAQ ------------------------------------ */

.faq-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  margin-bottom: 0.85rem;
  overflow: hidden;
}

.faq-item summary {
  cursor: pointer;
  list-style: none;
  padding: 1.1rem 1.4rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "+";
  font-size: 1.3rem;
  color: var(--color-brand);
  transition: transform 0.15s ease;
  flex-shrink: 0;
}

.faq-item[open] summary::after {
  transform: rotate(45deg);
}

.faq-item .faq-body {
  padding: 0 1.4rem 1.2rem;
  color: var(--color-text-muted);
}

/* ------------------------------ Callout / notes ------------------------------ */

.callout {
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-brand);
  background: var(--color-bg-alt);
  border-radius: 8px;
  padding: 1rem 1.25rem;
  margin: 1.25rem 0;
}

.callout.warning {
  border-left-color: #d68a00;
}

.callout strong {
  display: block;
  margin-bottom: 0.25rem;
}

/* ------------------------------------ Footer ---------------------------------- */

.footer {
  border-top: 1px solid var(--color-border);
  background: var(--color-bg-alt);
  margin-top: 3rem;
  padding: 2.5rem 0 1.5rem;
}

.footer-container {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  justify-content: space-between;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.footer-container p {
  color: var(--color-text-muted);
  max-width: 360px;
  margin: 0.4rem 0 0;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

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

.footer-links a:hover {
  color: var(--color-brand);
}

.footer-note {
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.85rem;
  margin-top: 2rem;
}

/* ------------------------------------ Utility ---------------------------------- */

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

.mt-2 {
  margin-top: 1.5rem;
}

.badge-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  justify-content: center;
  margin-bottom: 1.25rem;
}

.badge-row img {
  height: 20px;
}

/* ------------------------------------ Responsive -------------------------------- */

@media (max-width: 780px) {
  .nav-links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    align-items: flex-start;
    padding: 1rem 1.5rem;
    gap: 1rem;
    display: none;
    box-shadow: var(--shadow-md);
  }

  .nav-links.open {
    display: flex;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .footer-container {
    flex-direction: column;
  }
}