/* MCP Desk — marketing site
   Dark tech aesthetic, responsive, accessible basics */

:root {
  --bg: #070b14;
  --bg-elevated: #0d1424;
  --bg-card: #111a2e;
  --border: rgba(148, 163, 184, 0.14);
  --border-strong: rgba(148, 163, 184, 0.28);
  --text: #e8eef9;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  --accent: #22d3ee;
  --accent-dim: rgba(34, 211, 238, 0.12);
  --accent-hover: #67e8f9;
  --accent-2: #818cf8;
  --success: #34d399;
  --danger: #f87171;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.45);
  --font: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: "JetBrains Mono", "SF Mono", ui-monospace, Menlo, Consolas, monospace;
  --max: 1100px;
  --header-h: 68px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text);
  background:
    radial-gradient(1200px 600px at 80% -10%, rgba(34, 211, 238, 0.08), transparent 60%),
    radial-gradient(900px 500px at -10% 20%, rgba(129, 140, 248, 0.1), transparent 55%),
    var(--bg);
  -webkit-font-smoothing: antialiased;
}

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

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

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

a:focus-visible,
button:focus-visible,
input:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -3rem;
  background: var(--accent);
  color: #041018;
  padding: 0.5rem 0.85rem;
  border-radius: var(--radius-sm);
  z-index: 100;
  font-weight: 600;
}

.skip-link:focus {
  top: 1rem;
}

.container {
  width: min(100% - 2rem, var(--max));
  margin-inline: auto;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--header-h);
  backdrop-filter: blur(14px);
  background: rgba(7, 11, 20, 0.78);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--text);
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: -0.02em;
}

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

.logo-mark {
  width: 32px;
  height: 32px;
  border-radius: 9px;
  display: block;
  flex-shrink: 0;
  object-fit: cover;
  object-position: center 28%;
  box-shadow: 0 0 24px rgba(34, 211, 238, 0.35);
}

.logo-word {
  line-height: 1;
}

.logo:hover .logo-mark {
  box-shadow: 0 0 28px rgba(34, 211, 238, 0.5);
  filter: brightness(1.06);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.35rem 1.25rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  color: var(--text-muted);
  font-size: 0.95rem;
  font-weight: 500;
}

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

.nav-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: var(--radius-sm);
  padding: 0.4rem 0.65rem;
  cursor: pointer;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.7rem 1.15rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font: inherit;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease,
    transform 0.15s ease;
  text-decoration: none;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), #06b6d4);
  color: #041018;
}

.btn-primary:hover {
  color: #041018;
  background: linear-gradient(135deg, var(--accent-hover), var(--accent));
}

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

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

.btn-download {
  background: var(--bg-card);
  border: 1px solid var(--border-strong);
  color: var(--text);
  min-width: 11rem;
  border-radius: var(--radius);
}

.btn-download:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-dim);
}

.btn-download .platform {
  font-size: 0.8rem;
  color: var(--text-dim);
  font-weight: 500;
}

.btn-sm {
  padding: 0.45rem 0.9rem;
  font-size: 0.875rem;
}

/* Hero */
.hero {
  padding: 4.5rem 0 3.5rem;
}

.hero-grid {
  display: grid;
  gap: 2.5rem;
  align-items: center;
}

@media (min-width: 900px) {
  .hero-grid {
    grid-template-columns: 1.15fr 0.85fr;
  }
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.3rem 0.75rem;
  border-radius: 999px;
  background: var(--accent-dim);
  border: 1px solid rgba(34, 211, 238, 0.25);
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  margin-bottom: 1.1rem;
}

.hero h1 {
  margin: 0 0 1rem;
  font-size: clamp(2.2rem, 5vw, 3.35rem);
  line-height: 1.12;
  letter-spacing: -0.035em;
}

.hero h1 .accent {
  background: linear-gradient(120deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.lead {
  margin: 0 0 1.75rem;
  color: var(--text-muted);
  font-size: 1.125rem;
  max-width: 36rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.hero-meta {
  color: var(--text-dim);
  font-size: 0.875rem;
}

/* Code card preview */
.preview-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: calc(var(--radius) + 4px);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.preview-bar {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.02);
}

.dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--text-dim);
}

.dot:nth-child(1) {
  background: #f87171;
}
.dot:nth-child(2) {
  background: #fbbf24;
}
.dot:nth-child(3) {
  background: #34d399;
}

.preview-title {
  margin-left: 0.5rem;
  font-size: 0.8rem;
  color: var(--text-dim);
}

.preview-body {
  padding: 1.5rem 1.35rem 1.75rem;
}

.code-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-dim);
  margin-bottom: 0.65rem;
}

.code-display {
  font-family: var(--mono);
  font-size: clamp(1.6rem, 4vw, 2.1rem);
  font-weight: 600;
  letter-spacing: 0.18em;
  color: var(--text);
  margin-bottom: 1.25rem;
}

.code-display span {
  color: var(--accent);
}

.preview-rows {
  display: grid;
  gap: 0.65rem;
}

.preview-row {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.7rem 0.85rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
}

.preview-row strong {
  color: var(--success);
  font-weight: 600;
}

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

/* Sections */
section {
  padding: 3.5rem 0;
}

.section-head {
  max-width: 38rem;
  margin-bottom: 2rem;
}

.section-head h2 {
  margin: 0 0 0.65rem;
  font-size: clamp(1.6rem, 3vw, 2rem);
  letter-spacing: -0.025em;
}

.section-head p {
  margin: 0;
  color: var(--text-muted);
}

.divider {
  border: 0;
  border-top: 1px solid var(--border);
  margin: 0;
}

/* Explainer cards */
.card-grid {
  display: grid;
  gap: 1rem;
}

@media (min-width: 700px) {
  .card-grid.cols-3 {
    grid-template-columns: repeat(3, 1fr);
  }
}

.card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.35rem 1.25rem;
}

.card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.05rem;
}

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

.card-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  background: var(--accent-dim);
  color: var(--accent);
  margin-bottom: 0.9rem;
  font-size: 1.1rem;
}

/* Download */
.download-panel {
  background: linear-gradient(160deg, rgba(34, 211, 238, 0.06), transparent 50%),
    var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: calc(var(--radius) + 4px);
  padding: 2rem 1.5rem;
}

.download-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 1.25rem;
}

.download-note {
  margin-top: 1rem;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  background: rgba(251, 191, 36, 0.08);
  border: 1px solid rgba(251, 191, 36, 0.28);
  color: #fbbf24;
  font-size: 0.9rem;
}

/* How it works */
.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1rem;
}

@media (min-width: 800px) {
  .steps {
    grid-template-columns: repeat(4, 1fr);
  }
}

.step {
  position: relative;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.1rem 1.35rem;
}

.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--accent);
  color: #041018;
  font-size: 0.8rem;
  font-weight: 700;
  margin-bottom: 0.85rem;
}

.step h3 {
  margin: 0 0 0.4rem;
  font-size: 1rem;
}

.step p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* Auth pages */
.auth-wrap {
  min-height: calc(100vh - var(--header-h) - 180px);
  display: grid;
  place-items: center;
  padding: 2.5rem 0;
}

.auth-card {
  width: min(100%, 420px);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: calc(var(--radius) + 4px);
  padding: 2rem 1.5rem;
  box-shadow: var(--shadow);
}

.auth-card h1 {
  margin: 0 0 0.35rem;
  font-size: 1.55rem;
  letter-spacing: -0.02em;
}

.auth-card .sub {
  margin: 0 0 1.5rem;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.form-group {
  margin-bottom: 1rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.4rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-muted);
}

.form-group input {
  width: 100%;
  padding: 0.7rem 0.85rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-strong);
  background: var(--bg);
  color: var(--text);
  font: inherit;
}

.form-group input::placeholder {
  color: var(--text-dim);
}

.form-actions {
  margin-top: 1.25rem;
}

.form-actions .btn {
  width: 100%;
}

.form-status {
  margin-top: 1rem;
  padding: 0.75rem 0.9rem;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
}

.form-status--info {
  background: var(--accent-dim);
  border: 1px solid rgba(34, 211, 238, 0.3);
  color: var(--accent);
}

.form-status--error {
  background: rgba(248, 113, 113, 0.1);
  border: 1px solid rgba(248, 113, 113, 0.35);
  color: var(--danger);
}

.auth-footer {
  margin-top: 1.25rem;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.stub-badge {
  display: inline-block;
  margin-bottom: 0.85rem;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  background: rgba(251, 191, 36, 0.1);
  color: #fbbf24;
  border: 1px solid rgba(251, 191, 36, 0.25);
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 2.25rem 0 2.5rem;
  margin-top: 1rem;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 2rem;
  justify-content: space-between;
  align-items: flex-start;
}

.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.footer-logo {
  width: 22px;
  height: 22px;
  border-radius: 6px;
  flex-shrink: 0;
  object-fit: cover;
  object-position: center 28%;
  box-shadow: 0 0 14px rgba(34, 211, 238, 0.25);
}

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

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-links a {
  color: var(--text-muted);
  font-size: 0.9rem;
}

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

.footer-note {
  width: 100%;
  margin-top: 0.5rem;
  color: var(--text-dim);
  font-size: 0.8rem;
}

/* Mobile nav */
@media (max-width: 720px) {
  .nav-toggle {
    display: inline-flex;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0.75rem 1rem 1rem;
    background: rgba(7, 11, 20, 0.96);
    border-bottom: 1px solid var(--border);
  }

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

  .nav-links li {
    border-bottom: 1px solid var(--border);
  }

  .nav-links a {
    display: block;
    padding: 0.75rem 0.25rem;
  }

  .nav-links .btn {
    margin-top: 0.5rem;
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  .btn:hover {
    transform: none;
  }
}

/* ---- Expansion: features, hub, docs ---- */

@media (min-width: 700px) {
  .card-grid.cols-2 {
    grid-template-columns: repeat(2, 1fr);
  }
}

.otp-row {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  margin-bottom: 1.1rem;
  padding: 0.55rem 0.85rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
}

.otp-value {
  font-family: var(--mono);
  letter-spacing: 0.12em;
  color: var(--accent-2);
}

.otp-hint {
  margin-left: auto;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-dim);
}

.hub-panel {
  background: linear-gradient(160deg, rgba(129, 140, 248, 0.08), transparent 55%),
    var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: calc(var(--radius) + 4px);
  padding: 2rem 1.5rem;
}

.hub-cta {
  margin: 1.25rem 0 0;
}

.bullet-list {
  margin: 1.25rem 0 0;
  padding: 0 0 0 1.15rem;
  color: var(--text-muted);
}

.bullet-list li {
  margin-bottom: 0.65rem;
}

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

.card code,
.step code,
.hub-panel code,
.section-head code,
.footer-note code {
  font-family: var(--mono);
  font-size: 0.85em;
  padding: 0.1em 0.35em;
  border-radius: 4px;
  background: rgba(148, 163, 184, 0.12);
  color: var(--accent);
}

/* Docs page */
.docs-main {
  padding: 2.5rem 0 3.5rem;
}

.docs-layout {
  max-width: 720px;
}

.docs-hero {
  margin-bottom: 1.75rem;
}

.docs-hero h1 {
  margin: 0 0 0.65rem;
  font-size: clamp(1.8rem, 4vw, 2.4rem);
  letter-spacing: -0.03em;
}

.docs-toc {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 0.85rem;
  margin-bottom: 2rem;
  padding: 0.85rem 1rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.docs-toc a {
  color: var(--text-muted);
  font-size: 0.875rem;
  font-weight: 500;
}

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

.docs-section {
  padding: 0 0 2rem;
  margin-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
}

.docs-section:last-of-type {
  border-bottom: 0;
}

.docs-section h2 {
  margin: 0 0 0.75rem;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
}

.docs-section p {
  margin: 0 0 0.85rem;
  color: var(--text-muted);
}

.docs-steps {
  margin: 0 0 1rem;
  padding-left: 1.25rem;
  color: var(--text-muted);
}

.docs-steps li {
  margin-bottom: 0.4rem;
}

.code-block {
  margin: 0.75rem 0;
  padding: 0.9rem 1rem;
  overflow-x: auto;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--accent);
}

.code-block code {
  background: none;
  padding: 0;
  color: inherit;
}

.small {
  font-size: 0.875rem;
}


/* ---- PNG marketing assets ---- */

.hero-visual {
  margin: 0;
  border-radius: calc(var(--radius) + 6px);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  background: var(--bg-elevated);
  max-width: 560px;
  justify-self: end;
  width: 100%;
}

.hero-img {
  width: 100%;
  height: auto;
  max-width: 100%;
  display: block;
  object-fit: cover;
  aspect-ratio: 16 / 9;
}

.media-card {
  margin: 1.75rem 0 0;
  border-radius: calc(var(--radius) + 4px);
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.28);
}

.media-card--wide {
  max-width: 920px;
}

.media-card--ui {
  margin-top: 0;
  max-width: 520px;
}

.media-img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  object-position: center;
}

.media-caption {
  margin: 0;
  padding: 0.75rem 1rem 0.9rem;
  font-size: 0.875rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.02);
}

.feature-split {
  display: grid;
  gap: 1.25rem;
  align-items: start;
}

@media (min-width: 960px) {
  .feature-split {
    grid-template-columns: 1.1fr 0.9fr;
    gap: 1.5rem;
  }

  .feature-split .card-grid.cols-2 {
    grid-template-columns: 1fr;
  }
}

@media (min-width: 1100px) {
  .feature-split .card-grid.cols-2 {
    grid-template-columns: repeat(2, 1fr);
  }
}