/* ============================================================
 * Pukdee Marketing — Landing Pages CSS
 *
 * For: index.php, lobby.php, features.php, faq.php, docs.php, terms.php, privacy.php
 *
 * Load order: tokens.css → base.css → components.css → marketing.css
 *
 * Namespace: .mk-*
 * Reference: DESIGN.md §7 Pattern A (Public Landing)
 *
 * Sections:
 *   1. Container + layout primitives
 *   2. Nav (sticky top)
 *   3. Logo
 *   4. Hero (page title + sub)
 *   5. Sections (vertical rhythm)
 *   6. FAQ accordion (<details>/<summary>)
 *   7. CTA card (highlighted contact card)
 *   8. Footer
 *   9. Mobile bottom nav
 *  10. Responsive
 * ============================================================ */

/* ============================================================
 * 1. CONTAINER
 * ============================================================ */
.mk-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--container-padding-sm);
}
@media (min-width: 768px) {
  .mk-container { padding: 0 var(--container-padding-lg); }
}
.mk-container--narrow { max-width: 880px; }
.mk-container--wide   { max-width: var(--container-max); }

/* ============================================================
 * 2. NAV (sticky top)
 * ============================================================ */
.mk-nav {
  position: sticky;
  top: 0;
  z-index: var(--z-nav);
  background: rgba(250, 250, 247, 0.85); /* bg-canvas with transparency */
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--border);
}

.mk-nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-3) 0;
}

.mk-nav__links {
  display: none;
  align-items: center;
  gap: var(--space-6);
  font-size: var(--text-sm);
  color: var(--text-sub);
}
.mk-nav__links a {
  color: inherit;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: color var(--transition-fast);
}
.mk-nav__links a:hover { color: var(--brand-700); }

@media (min-width: 1024px) {
  .mk-nav__links { display: flex; }
}

.mk-nav__cta {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.mk-nav__mobile-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: var(--radius-md);
  background: var(--bg-surface);
  border: 1px solid var(--border);
  color: var(--text-sub);
  cursor: pointer;
}
@media (min-width: 1024px) {
  .mk-nav__mobile-toggle { display: none; }
}

.mk-nav__mobile-menu {
  display: none;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-4) 0;
  border-top: 1px solid var(--border);
}
.mk-nav__mobile-menu.is-open { display: flex; }
.mk-nav__mobile-menu a {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3);
  border-radius: var(--radius-md);
  color: var(--text-body);
  text-decoration: none;
  font-weight: var(--weight-medium);
}
.mk-nav__mobile-menu a:hover { background: var(--bg-muted); color: var(--brand-700); }
.mk-nav__mobile-menu .ti { color: var(--brand-500); }

@media (min-width: 1024px) {
  .mk-nav__mobile-menu { display: none !important; }
}

/* hide CTA login link on mobile (keep "Free trial" though) */
@media (max-width: 767px) {
  .mk-nav__cta .mk-nav__login { display: none; }
}

/* ============================================================
 * 3. LOGO
 * ============================================================ */
.mk-logo {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  color: var(--text-heading);
  font-weight: var(--weight-medium);
  font-size: var(--text-h3);
  letter-spacing: -0.01em;
  transition: opacity var(--transition-fast);
}
.mk-logo:hover { opacity: 0.85; }
.mk-logo__img {
  width: 32px;
  height: 32px;
  padding: 4px;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-xs);
}
.mk-logo__brand-suffix {
  color: var(--brand-500);
  font-weight: var(--weight-medium);
}

/* ============================================================
 * 4. HERO (page title + sub)
 * ============================================================ */
.mk-hero {
  padding: var(--space-10) 0 var(--space-8);
  text-align: center;
  background: linear-gradient(180deg, var(--brand-50) 0%, var(--bg-canvas) 100%);
  border-bottom: 1px solid var(--border);
}
@media (min-width: 768px) {
  .mk-hero { padding: var(--space-14) 0 var(--space-10); }
}

.mk-hero__eyebrow {
  display: inline-block;
  margin-bottom: var(--space-3);
  padding: 4px var(--space-3);
  font-size: var(--text-mini);
  font-weight: var(--weight-medium);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--brand-700);
  background: var(--brand-50);
  border: 1px solid var(--brand-200);
  border-radius: var(--radius-full);
}

.mk-hero h1 {
  font-size: 28px;
  font-weight: var(--weight-medium);
  color: var(--text-heading);
  margin-bottom: var(--space-3);
  line-height: var(--leading-tight);
}
@media (min-width: 768px) {
  .mk-hero h1 { font-size: 40px; }
}

.mk-hero__sub {
  font-size: var(--text-body);
  color: var(--text-sub);
  max-width: 640px;
  margin: 0 auto;
  line-height: var(--leading-relaxed);
}

/* ============================================================
 * 5. SECTIONS
 * ============================================================ */
.mk-section {
  padding: var(--space-10) 0;
}
@media (min-width: 768px) {
  .mk-section { padding: var(--space-14) 0; }
}

/* ============================================================
 * 6. FAQ ACCORDION (uses <details>/<summary>)
 * ============================================================ */
.mk-faq-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.mk-faq-item {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}
.mk-faq-item[open] {
  border-color: var(--brand-200);
  box-shadow: var(--shadow-sm);
}
.mk-faq-item:hover { border-color: var(--brand-200); }

.mk-faq-item summary {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  cursor: pointer;
  list-style: none;
  user-select: none;
}
.mk-faq-item summary::-webkit-details-marker { display: none; }

.mk-faq-q {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-md);
  background: var(--bg-muted);
  border: 1px solid var(--border);
  color: var(--text-sub);
  font-size: 13px;
  font-weight: var(--weight-medium);
  transition: all var(--transition-fast);
}
.mk-faq-item[open] .mk-faq-q {
  background: var(--brand-50);
  border-color: var(--brand-200);
  color: var(--brand-700);
}

.mk-faq-question {
  flex: 1;
  margin: 0;
  padding-top: 6px;
  font-size: var(--text-h3);
  font-weight: var(--weight-medium);
  color: var(--text-body);
  line-height: var(--leading-snug);
  transition: color var(--transition-fast);
}
.mk-faq-item[open] .mk-faq-question { color: var(--brand-700); }

.mk-faq-chevron {
  flex-shrink: 0;
  margin-top: 8px;
  color: var(--text-mute);
  transition: transform var(--transition-base);
}
.mk-faq-item[open] .mk-faq-chevron {
  transform: rotate(180deg);
  color: var(--brand-500);
}

.mk-faq-answer {
  padding: 0 var(--space-5) var(--space-5) calc(var(--space-5) + 32px + var(--space-3));
  font-size: var(--text-sm);
  color: var(--text-sub);
  line-height: var(--leading-relaxed);
}

/* ============================================================
 * 7. CTA CARD (highlighted "still have questions" block)
 * ============================================================ */
.mk-cta-card {
  margin-top: var(--space-10);
  padding: var(--space-8) var(--space-6);
  background: var(--brand-50);
  border: 1px solid var(--brand-200);
  border-radius: var(--radius-xl);
  text-align: center;
}
@media (min-width: 768px) {
  .mk-cta-card { padding: var(--space-10) var(--space-8); }
}

.mk-cta-card h4 {
  font-size: 22px;
  font-weight: var(--weight-medium);
  color: var(--brand-900);
  margin-bottom: var(--space-3);
}
.mk-cta-card p {
  color: var(--text-sub);
  margin-bottom: var(--space-6);
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

.mk-cta-actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  align-items: center;
  justify-content: center;
}
@media (min-width: 640px) {
  .mk-cta-actions { flex-direction: row; }
}
.mk-cta-actions .btn { min-width: 220px; }

/* LINE brand button (use platform color) */
.btn-line {
  background: var(--platform-line);
  color: #fff;
  border-color: var(--platform-line);
}
.btn-line:hover {
  filter: brightness(0.95);
  background: var(--platform-line);
  color: #fff;
}

/* ============================================================
 * 8. FOOTER
 * ============================================================ */
.mk-footer {
  padding: var(--space-10) 0 calc(var(--space-14) + env(safe-area-inset-bottom, 0));
  border-top: 1px solid var(--border);
  background: var(--bg-subtle);
  text-align: center;
}
@media (min-width: 768px) {
  .mk-footer { padding: var(--space-14) 0; }
}

.mk-footer__brand {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
}
.mk-footer__brand-logo {
  width: 48px;
  height: 48px;
  padding: 6px;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xs);
}
.mk-footer__brand-name {
  font-size: 22px;
  font-weight: var(--weight-medium);
  letter-spacing: -0.02em;
  color: var(--text-heading);
}
.mk-footer__brand-name .mk-logo__brand-suffix { color: var(--brand-500); }

.mk-footer__tagline {
  font-size: var(--text-sm);
  color: var(--text-mute);
  font-style: italic;
  margin-bottom: var(--space-2);
}
.mk-footer__desc {
  font-size: var(--text-sm);
  color: var(--text-sub);
  margin-bottom: var(--space-6);
}

.mk-footer__contacts {
  display: inline-flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: var(--space-3) var(--space-5);
  padding: var(--space-3) var(--space-5);
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  font-size: var(--text-sm);
  color: var(--text-sub);
}
.mk-footer__contacts a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--text-sub);
  text-decoration: none;
  transition: color var(--transition-fast);
}
.mk-footer__contacts a:hover { color: var(--brand-700); }
.mk-footer__contacts img {
  width: 16px;
  height: 16px;
  opacity: 0.8;
}
.mk-footer__contacts .mk-divider {
  display: none;
  width: 1px;
  height: 16px;
  background: var(--border);
}
@media (min-width: 768px) {
  .mk-footer__contacts .mk-divider { display: inline-block; }
}

.mk-footer__copyright {
  margin-top: var(--space-8);
  font-size: var(--text-mini);
  color: var(--text-mute);
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

/* ============================================================
 * 9. MOBILE BOTTOM NAV (sticky bottom bar)
 * ============================================================ */
.mk-mobile-bottom {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: var(--z-sticky);
  padding: var(--space-3) var(--space-4) calc(var(--space-3) + env(safe-area-inset-bottom, 0));
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-top: 1px solid var(--border);
  box-shadow: 0 -8px 30px rgba(0, 0, 0, 0.05);
}
@media (min-width: 768px) {
  .mk-mobile-bottom { display: none; }
}

.mk-mobile-bottom__item {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  min-width: 56px;
  padding: 6px;
  text-decoration: none;
  color: var(--text-sub);
  font-size: 10px;
  font-weight: var(--weight-medium);
  transition: color var(--transition-fast);
}
.mk-mobile-bottom__item:hover { color: var(--brand-700); }
.mk-mobile-bottom__item .ti { font-size: 18px; }

.mk-mobile-bottom__cta {
  flex: 1;
}

/* leave space at the bottom of the page for mobile bottom bar */
@media (max-width: 767px) {
  body.has-mobile-bottom { padding-bottom: 80px; }
}