/* ============================================================
   Calliope AI — static site styles
   Design tokens: adjust brand colors here in one place.
   ============================================================ */

:root {
  --color-bg: #ffffff;
  --color-bg-soft: #f6f6f9;
  --color-text: #0a0a14;
  --color-muted: #5c5c6e;
  --color-accent: #5b4cf5;
  --color-accent-dark: #4438d6;
  --color-accent-soft: #eceaff;
  --color-heading-accent: #262063;
  --color-border: #e6e6ee;

  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-heading: "Lexend", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-label: "Be Vietnam Pro", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-display: "Poppins", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  --radius: 14px;
  --radius-lg: 24px;
  --container: 1200px;
  --shadow: 0 10px 40px rgba(10, 10, 20, .08);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

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

h1, h2, h3, h4, h5, h6, .logo {
  font-family: var(--font-heading);
  font-weight: 700;
  letter-spacing: -.02em;
}

img { max-width: 100%; height: auto; }

a { color: inherit; text-decoration: none; }

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  padding: 12px 24px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 15px;
  white-space: nowrap;
  transition: background .2s, transform .2s;
}
.btn-primary { background: var(--color-accent); color: #fff; }
.btn-primary:hover { background: var(--color-accent-dark); transform: translateY(-1px); }
.btn-lg { padding: 16px 36px; font-size: 17px; }

/* ---------- Header ---------- */
.header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, .85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}
.header-inner {
  display: flex;
  align-items: center;
  gap: 32px;
  height: 72px;
}
.logo { display: flex; align-items: center; font-weight: 800; font-size: 22px; flex: none; }
.logo img { height: 32px; width: auto; display: block; }
.logo-mark { color: var(--color-accent); }
.nav { display: flex; gap: 28px; margin-left: auto; }
.nav a {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-accent);
  transition: color .2s;
  white-space: nowrap;
}
.nav a:hover, .nav a.active { color: var(--color-text); }
.nav-toggle { display: none; }
.lang-switch {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-muted);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 6px 14px;
  transition: color .2s, border-color .2s;
}
.lang-switch:hover { color: var(--color-text); border-color: var(--color-muted); }

/* ---------- Hero ---------- */
.hero {
  padding: 96px 0 64px;
  text-align: center;
  position: relative;
  background:
    radial-gradient(55% 45% at 50% 0%, rgba(91, 76, 245, .14), transparent 70%),
    radial-gradient(35% 35% at 82% 18%, rgba(236, 72, 153, .09), transparent 70%),
    radial-gradient(35% 35% at 15% 25%, rgba(56, 189, 248, .08), transparent 70%);
}
.badge {
  display: inline-block;
  padding: 6px 16px;
  border-radius: 999px;
  background: var(--color-accent-soft);
  color: var(--color-accent);
  font-family: var(--font-label);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .04em;
  text-transform: uppercase;
  margin-bottom: 24px;
}
.hero h1 {
  font-size: clamp(40px, 6vw, 72px);
  line-height: 1.05;
  letter-spacing: -.02em;
  font-weight: 700;
  margin: 0 0 24px;
}
.hero .subtitle {
  font-size: 19px;
  color: var(--color-muted);
  max-width: 640px;
  margin: 0 auto 32px;
}
.hero-image {
  margin-top: 56px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

/* ---------- Logos band ---------- */
.logos {
  padding: 40px 0 64px;
  border-bottom: 1px solid var(--color-border);
}
.logos-track {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: 48px;
  opacity: .55;
  filter: grayscale(1);
}
.logos-track img { height: 28px; width: auto; }

/* ---------- Feature sections ---------- */
.feature {
  padding: 96px 0;
}
.feature-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}
.feature.reverse .feature-inner { direction: rtl; }
.feature.reverse .feature-inner > * { direction: ltr; }
.feature .kicker {
  display: inline-block;
  padding: 6px 16px;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background: #fff;
  color: var(--color-text);
  font-weight: 600;
  font-size: 13px;
  margin: 0 0 20px;
}
.feature h2 {
  font-size: clamp(28px, 4vw, 42px);
  line-height: 1.15;
  letter-spacing: -.02em;
  margin: 0 0 20px;
}
.feature p { color: var(--color-muted); font-size: 17px; }
.feature img {
  display: block;
  margin: 0 auto;
  max-height: 640px;
  width: auto;
  max-width: 100%;
  object-fit: contain;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}
.feature.soft { background: var(--color-bg-soft); }

.ticks {
  list-style: none;
  padding: 0;
  margin: 24px 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 12px 28px;
}
.ticks li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 500;
  font-size: 15px;
}
.ticks li::before {
  content: "";
  width: 20px;
  height: 20px;
  flex: none;
  border-radius: 50%;
  background: var(--color-accent-soft) url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="10" height="8" viewBox="0 0 10 8"><path d="M1 4l2.5 2.5L9 1" stroke="%235b4cf5" stroke-width="2" fill="none" stroke-linecap="round" stroke-linejoin="round"/></svg>') center / 10px no-repeat;
}

/* ---------- Connectors ---------- */
.connectors { padding: 96px 0; background: var(--color-bg-soft); }
.connectors .section-head { text-align: center; max-width: 640px; margin: 0 auto 56px; }
.connectors h2 { font-size: clamp(28px, 4vw, 42px); letter-spacing: -.02em; margin: 0 0 16px; }
.connectors .section-head p { color: var(--color-muted); font-size: 17px; }
.connector-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.connector-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.connector-card img { height: 32px; width: auto; align-self: flex-start; object-fit: contain; }
.connector-card h3 { margin: 0; font-size: 18px; }
.connector-card p { margin: 0; color: var(--color-muted); font-size: 14px; flex: 1; }
.connector-card .tag {
  align-self: flex-start;
  font-size: 12px;
  font-weight: 600;
  color: var(--color-accent);
  background: var(--color-accent-soft);
  padding: 4px 12px;
  border-radius: 999px;
}
.connectors .more {
  text-align: center;
  margin-top: 40px;
  color: var(--color-muted);
  font-weight: 500;
}

/* ---------- Stats (about) ---------- */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  padding: 64px 0;
}
.stat h3 { font-size: 40px; margin: 0 0 8px; color: var(--color-accent); }
.stat strong { display: block; margin-bottom: 6px; }
.stat p { margin: 0; color: var(--color-muted); font-size: 14px; }

/* ---------- Prose (legal, posts, about text) ---------- */
.prose {
  max-width: 760px;
  margin: 0 auto;
  padding: 64px 24px 96px;
}
.prose h1 { font-size: clamp(32px, 5vw, 48px); letter-spacing: -.02em; line-height: 1.1; }
.prose h2 { margin-top: 2.2em; letter-spacing: -.01em; }
.prose h5, .prose h2.legal { font-size: 20px; }
.prose .meta { color: var(--color-muted); font-size: 14px; margin-bottom: 2em; }
.prose img { border-radius: var(--radius); margin: 1.5em 0; }
.prose blockquote {
  border-left: 3px solid var(--color-accent);
  margin: 1.5em 0;
  padding: .2em 0 .2em 1.2em;
  color: var(--color-muted);
}

/* ---------- Blog index ---------- */
.post-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 48px 32px;
  padding: 32px 0 96px;
}
.post-card { display: block; }
.post-card .cover {
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border-radius: var(--radius);
  margin-bottom: 20px;
}
.post-card .meta {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  font-size: 14px;
  margin-bottom: 14px;
  align-items: center;
}
.post-card .category {
  color: var(--color-accent);
  background: var(--color-accent-soft);
  font-family: var(--font-label);
  font-weight: 700;
  font-size: 12px;
  letter-spacing: .02em;
  text-transform: uppercase;
  padding: 5px 14px;
  border-radius: 999px;
}
.post-card .date { color: var(--color-muted); }
.post-card h2 {
  margin: 0;
  font-size: 24px;
  line-height: 1.25;
  letter-spacing: -.01em;
  color: var(--color-heading-accent);
  transition: color .2s;
}
.post-card:hover h2 { color: var(--color-accent); }
.hero h1.accent { color: var(--color-heading-accent); }
.post-tags { display: flex; gap: 8px; flex-wrap: wrap; margin: -8px 0 24px; }
.post-tags .tag {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-accent);
  background: var(--color-accent-soft);
  padding: 4px 12px;
  border-radius: 999px;
}

/* ---------- Contact ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  padding: 64px 0 96px;
}
.contact-form {
  background: var(--color-bg-soft);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 36px;
}
.contact-form h2 { margin-top: 0; }
.contact-form label { display: block; font-weight: 600; font-size: 14px; margin: 18px 0 6px; }
.contact-form input, .contact-form textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  font: inherit;
  background: #fff;
}
.contact-form button { margin-top: 24px; border: 0; cursor: pointer; width: 100%; }

.contact-booking h2 { margin-top: 0; }
.contact-booking .tidycal-embed {
  min-height: 600px;
  width: 100%;
}
.contact-booking .tidycal-embed iframe { width: 100%; border: 0; }

.faq h2 { margin-top: 0; }
.faq details {
  border-bottom: 1px solid var(--color-border);
  padding: 16px 0;
}
.faq summary { font-weight: 600; cursor: pointer; }
.faq details p { color: var(--color-muted); }

/* ---------- Final CTA ---------- */
.cta-final {
  background:
    radial-gradient(50% 60% at 50% 100%, rgba(91, 76, 245, .12), transparent 70%),
    linear-gradient(180deg, var(--color-bg-soft), #fff);
  border-top: 1px solid var(--color-border);
  padding: 96px 0 0;
  text-align: center;
}
.cta-final h2 { font-size: clamp(32px, 5vw, 56px); letter-spacing: -.02em; margin: 0 0 16px; }
.cta-final p { color: var(--color-muted); font-size: 18px; margin: 0 0 32px; }
.cta-final img {
  display: block;
  margin: 64px auto 0;
  max-width: 900px;
  width: 100%;
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  box-shadow: var(--shadow);
}

/* ---------- Footer ---------- */
.footer {
  border-top: 1px solid var(--color-border);
  padding: 48px 0;
}
.footer-inner {
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
}
.footer-nav { display: flex; gap: 24px; flex-wrap: wrap; }
.footer-nav a { color: var(--color-muted); font-size: 14px; }
.footer-nav a:hover { color: var(--color-text); }
.logo-footer { margin-left: auto; }
.copyright { color: var(--color-muted); font-size: 14px; margin: 0; }

/* ---------- Scroll reveal ---------- */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity .7s cubic-bezier(.2, .6, .2, 1), transform .7s cubic-bezier(.2, .6, .2, 1);
  transition-delay: var(--reveal-delay, 0s);
}
.reveal.visible { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .feature-inner, .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .connector-grid, .post-grid { grid-template-columns: repeat(2, 1fr); }
  .stats { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
  .nav, .header-cta { display: none; }
  .nav-toggle {
    display: flex;
    flex-direction: column;
    gap: 5px;
    margin-left: auto;
    background: none;
    border: 0;
    cursor: pointer;
    padding: 8px;
  }
  .nav-toggle span { width: 22px; height: 2px; background: var(--color-text); }
  body.nav-open .nav {
    display: flex;
    flex-direction: column;
    position: fixed;
    inset: 72px 0 auto 0;
    background: #fff;
    padding: 24px;
    border-bottom: 1px solid var(--color-border);
  }
  .connector-grid, .post-grid { grid-template-columns: 1fr; }
  .hero { padding-top: 64px; }
}