/**
 * GAMMA - Responsive Styles
 * Breakpoints: 900px tablet, 600px mobile, 380px small
 */

/* Tablet (<=900px) */
@media (max-width: 900px) {
  .container, .container--narrow { padding: 0 24px; }
  nav { padding: 0 20px; }
  nav .nav-links { display: none; }
  .nav-cta { font-size: 12px; padding: 8px 14px; }
  .nav-burger { display: flex; }

  .hero { padding-top: 100px; padding-bottom: 60px; }
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .hero-title { font-size: 44px; }

  .mechanism { padding: 72px 0; }
  .mechanism-grid { grid-template-columns: 1fr; }
  .mechanism-binaural { grid-template-columns: 1fr; gap: 40px; }

  .tech-manifesto-bg { padding: 72px 0; }
  .tech-pillars { grid-template-columns: 1fr; }
  .tech-ai-process { grid-template-columns: 1fr; gap: 40px; }

  .profiles { padding: 72px 0; }
  .profiles-tabs { flex-wrap: wrap; }
  .profile-tab { font-size: 12px; padding: 11px 14px; }
  .profile-inner { grid-template-columns: 1fr; }
  .profile-main { border-right: none; border-bottom: 1px solid var(--rule); }
  .profile-conversion { grid-template-columns: 1fr; }
  .profile-conversion-left { border-right: none; border-bottom: 1px solid rgba(255,255,255,0.06); padding: 40px 28px; }
  .profile-conversion-right { padding: 40px 28px; }

  .program { padding: 72px 0; }

  .evidence { padding: 72px 0; }
  .evidence-grid { grid-template-columns: 1fr; }

  .safety { padding: 72px 0; }
  .safety-grid { grid-template-columns: 1fr; gap: 40px; }

  .pricing-card { grid-template-columns: 1fr; }
  .pricing-divider { width: 100%; height: 1px; }
  .pricing-left, .pricing-right { padding: 40px 28px; }
  .pricing-meta { font-size: 12px; line-height: 1.5; }

  .cta-section { padding: 80px 0; }
  .cta-section::before { font-size: 40vw; }
}

/* Mobile (<=600px) */
@media (max-width: 600px) {
  html, body { max-width: 100vw; }

  nav { height: 54px; padding: 0 16px; }
  .nav-cta { display: none; }
  .nav-brand { font-size: 13px; letter-spacing: 0.06em; }

  .container, .container--narrow { padding: 0 18px; max-width: 100%; }
  .wrap { padding: 0 20px; }

  .hero { padding-top: 80px; padding-bottom: 44px; }
  .hero-title { font-size: clamp(32px, 10vw, 46px); }
  .hero-subtitle { font-size: 17px; }
  .hero-meta { gap: 12px; font-size: 12px; }
  .hero-actions { flex-direction: column; gap: 10px; }
  .btn-primary, .btn-secondary {
    width: 100%;
    justify-content: center;
    font-size: 12px;
    padding: 14px 16px;
    letter-spacing: 0.06em;
    box-sizing: border-box;
  }
  .hero-meta { flex-direction: column; align-items: flex-start; gap: 8px; }

  .eeg-container { padding: 20px 18px; }
  .eeg-legend { flex-wrap: wrap; gap: 8px; }
  .eeg-legend-item { font-size: 11px; }
  .eeg-state-name { font-size: 17px; }

  .section-label { font-size: 11px; }
  .section-title { font-size: clamp(24px, 8vw, 36px); }
  .section-intro { font-size: 17px; }

  .mechanism { padding: 52px 0; }
  .mechanism-card { padding: 28px 22px; }
  .card-hz { font-size: 34px; }
  .binaural-diagram { padding: 24px 18px; }
  .bin-freq-val { font-size: 22px; }
  .bin-result-val { font-size: 22px; }

  .tech-manifesto-bg { padding: 52px 0; }
  .tech-title { font-size: clamp(28px, 9vw, 42px); }
  .tech-intro { font-size: 17px; }
  .tech-headline { margin-bottom: 48px; }
  .tech-pillar { padding: 30px 22px; }
  .tech-pillar-title { font-size: 22px; }
  .tech-pillar-desc { font-size: 15px; }
  .tech-stat-val { font-size: 16px; }
  .tech-pillars { margin-bottom: 48px; }

  .profiles { padding: 52px 0; }
  .profiles-tabs { display: grid; grid-template-columns: 1fr 1fr; border: 1px solid var(--rule); }
  .profile-tab { font-size: 11px; padding: 10px 8px; border-right: 1px solid var(--rule); border-bottom: 1px solid var(--rule); text-align: center; }
  .profile-main { padding: 28px 18px; }
  .profile-side { padding: 24px 18px; }
  .profile-name { font-size: 28px; }
  .profile-desc { font-size: 16px; }
  .profile-protocol { padding: 16px 18px; }
  .profile-conversion-left { padding: 32px 18px; }
  .profile-conversion-right { padding: 32px 18px; }
  .profile-conversion-title { font-size: 28px; }
  .profile-conversion-desc { font-size: 15px; }
  .profile-conversion-feature { font-size: 12px; }
  .conversion-amount { font-size: 48px; }
  .conversion-currency { font-size: 18px; }
  .conversion-currency-code { font-size: 12px; }
  .profile-conversion-meta { font-size: 11px; line-height: 1.5; }
  .profile-conversion-btn { font-size: 12px; padding: 14px; letter-spacing: 0.06em; }
  .profile-conversion-guarantee { font-size: 10px; line-height: 1.5; }

  .program { padding: 52px 0; }
  .program-header { margin-bottom: 40px; }
  .phase-row { grid-template-columns: 52px 1fr; }
  .phase-number { padding: 20px 8px; }
  .phase-num-val { font-size: 13px; }
  .phase-body { padding: 18px 16px; }
  .phase-name { font-size: 13px; }
  .phase-goal { font-size: 15px; }
  .phase-meta { gap: 8px; }
  .phase-meta-item { font-size: 11px; }

  .evidence { padding: 52px 0; }
  .evidence-header { margin-bottom: 36px; }
  .ref-card { padding: 22px 18px; }
  .ref-title { font-size: 16px; }
  .ref-finding { font-size: 15px; }

  .safety { padding: 52px 0; }
  .safety-col-title { font-size: 13px; }
  .safety-label { font-size: 15px; }
  .safety-sub { font-size: 14px; }

  .cta-section { padding: 60px 0; }
  .cta-title { font-size: clamp(26px, 8vw, 40px); }
  .cta-subtitle { font-size: 17px; }
  .pricing-card { margin-top: 40px; }
  .pricing-left { padding: 32px 18px; }
  .pricing-right { padding: 28px 18px; }
  .pricing-number { font-size: 48px; }
  .pricing-currency { font-size: 18px; margin-top: 6px; }
  .pricing-currency-code { font-size: 12px; margin-top: 8px; }
  .pricing-meta { font-size: 11px; margin-bottom: 24px; line-height: 1.6; }
  .pricing-cta-btn { font-size: 12px; padding: 14px 12px; letter-spacing: 0.06em; }
  .pricing-guarantee { font-size: 10px; line-height: 1.5; text-align: center; }
  .pricing-feature { gap: 12px; margin-bottom: 16px; padding-bottom: 16px; }
  .pricing-feature-title { font-size: 14px; }
  .pricing-feature-desc { font-size: 12px; }
  .pricing-section-title { font-size: 11px; margin-bottom: 18px; }
  .pricing-exclusions { font-size: 11px; gap: 8px; }
  .pricing-exclusions-title { font-size: 10px; }
  .cta-footer-note { font-size: 11px; margin-top: 20px; line-height: 1.5; }

  footer { padding: 32px 18px; }
  .footer-inner { flex-direction: column; align-items: flex-start; gap: 14px; }
  .footer-disclaimer { font-size: 11px; max-width: 100%; }

  .form-grid { grid-template-columns: 1fr; }
  .dim-row { grid-template-columns: 110px 1fr 36px; }
}

/* ── Video player responsive ── */
@media (max-width: 900px) {
  .gamma-video-wrap { padding: 0 24px; }
}
@media (max-width: 600px) {
  .gamma-video-wrap { padding: 0; }
  .gv-controls { padding: 8px 12px 10px; }
  .gv-btn { padding: 10px 12px; }
  #gvBtnFs { padding: 10px 14px; }
  .gv-vol-wrap { display: none; }          /* device controls volume on mobile */
  .gv-progress-bg { height: 4px; }
  .gv-progress-bg:hover { height: 4px; }
  .gv-time { font-size: 9px; }
  .gv-label { font-size: 8px; letter-spacing: 0.12em; }
}

/* Touch devices: controls always visible when paused or touch-active */
@media (hover: none) {
  .gv-controls { opacity: 0; pointer-events: none; transition: opacity 0.2s; }
  .gamma-video-inner.gv-paused .gv-controls,
  .gamma-video-inner.gv-touch .gv-controls { opacity: 1; pointer-events: auto; }
}

/* Very small (<=380px) */
@media (max-width: 380px) {
  .hero-title { font-size: 30px; }
  .btn-primary, .btn-secondary {
    font-size: 11px;
    padding: 12px 12px;
    letter-spacing: 0.04em;
  }
  .hero-meta { font-size: 11px; }
  .pricing-number { font-size: 36px; }
  .pricing-left { padding: 24px 14px; }
  .pricing-right { padding: 24px 14px; }
  .pricing-cta-btn { font-size: 11px; padding: 13px 10px; }
  .pricing-meta { font-size: 10px; }
  .pricing-guarantee { font-size: 9px; }
  .pricing-feature-title { font-size: 13px; }
  .pricing-feature-desc { font-size: 11px; }
  .pricing-exclusions { font-size: 10px; }
  .cta-footer-note { font-size: 10px; }
  .profile-conversion-left { padding: 24px 14px; }
  .profile-conversion-right { padding: 24px 14px; }
  .profile-conversion-title { font-size: 24px; }
  .profile-conversion-btn { font-size: 11px; padding: 13px 10px; }
  .conversion-amount { font-size: 40px; }
  .profiles-tabs { grid-template-columns: 1fr; }
  .profile-tab { border-right: none; }
  .tech-title { font-size: 28px; }
  .section-title { font-size: 26px; }
}