/* ══════════════════════════════════════════
   RheumaScore — Mobile Responsive CSS
   ══════════════════════════════════════════ */

/* ── Hamburger Button ── */
.hamburger-btn {
  display: none;
  background: none;
  border: 1px solid var(--border, #1e293b);
  color: var(--text, #f1f5f9);
  font-size: 1.4rem;
  padding: 6px 10px;
  border-radius: 8px;
  cursor: pointer;
  margin-left: auto;
  line-height: 1;
  z-index: 110;
  transition: background 0.2s, border-color 0.2s;
}
.hamburger-btn:hover {
  background: rgba(59, 130, 246, 0.12);
  border-color: #3b82f6;
}

/* ── Mobile Menu Overlay ── */
.mobile-menu-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  z-index: 199;
  opacity: 0;
  transition: opacity 0.3s ease;
}
.mobile-menu-overlay.active {
  display: block;
  opacity: 1;
}

.mobile-menu {
  display: none;
  position: fixed;
  top: 0;
  right: -280px;
  width: 280px;
  height: 100vh;
  background: var(--card, #111827);
  border-left: 1px solid var(--border, #1e293b);
  z-index: 200;
  padding: 20px;
  transition: right 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  overflow-y: auto;
}
.mobile-menu.active {
  display: block;
  right: 0;
}
.mobile-menu .mobile-menu-close {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  margin-bottom: 20px;
}
.mobile-menu .mobile-menu-close button {
  background: var(--bg2, #0c1018);
  border: 1px solid var(--border, #1e293b);
  color: var(--text, #f1f5f9);
  font-size: 1.2rem;
  width: 36px;
  height: 36px;
  border-radius: 8px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}
.mobile-menu a {
  display: block;
  color: var(--text-secondary, #94a3b8);
  text-decoration: none;
  font-size: 1rem;
  font-weight: 500;
  padding: 14px 16px;
  border-radius: 10px;
  margin-bottom: 4px;
  transition: all 0.2s;
  min-height: 48px;
  display: flex;
  align-items: center;
}
.mobile-menu a:hover,
.mobile-menu a.active {
  color: var(--accent, #3b82f6);
  background: rgba(59, 130, 246, 0.12);
}

/* ══════════════════════════════════
   TABLET — max-width: 768px
   ══════════════════════════════════ */
@media (max-width: 768px) {
  /* Show hamburger, hide nav links */
  .hamburger-btn { display: block; }

  /* Hide desktop nav links — all nav patterns across pages */
  .nav-links,
  .site-nav .nav-links,
  .top-nav .nav-links,
  nav > div > div:last-child {
    display: none !important;
  }

  /* Typography */
  h1, .header h1, .header-logo h1, .hero h1 {
    font-size: 1.6rem !important;
    word-wrap: break-word;
  }
  h2, .section h2, .section-title, .calc-title {
    font-size: 1.2rem !important;
  }
  .hero h1 { font-size: 1.8rem !important; }
  .hero .tagline { font-size: 0.95rem; }

  /* Container padding */
  .container { padding: 16px; }

  /* Stats bar — 2x2 grid */
  .stats-bar {
    display: grid !important;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    padding: 16px;
  }
  .stat .num { font-size: 1.3rem; }

  /* Disease/score cards — 2 columns */
  .disease-grid {
    grid-template-columns: repeat(2, 1fr) !important;
    gap: 10px;
  }
  .disease-card {
    padding: 20px 14px 18px;
    min-height: 44px;
  }
  .disease-card .emoji { font-size: 1.8rem; }
  .disease-card .name { font-size: 0.88rem; }

  .score-grid {
    grid-template-columns: repeat(2, 1fr) !important;
    gap: 10px;
  }
  .score-card { padding: 18px 14px; min-height: 44px; }

  /* Cards grid (criteria page) */
  .cards {
    grid-template-columns: repeat(2, 1fr) !important;
    gap: 12px;
  }
  .card-item { padding: 20px; }

  /* Binary grid */
  .binary-grid { grid-template-columns: 1fr !important; }
  .binary-item { padding: 12px; min-height: 44px; font-size: 0.88rem; }

  /* Calculator panel */
  .calc-panel { padding: 20px; border-radius: 16px; }

  /* Result panel */
  .result-panel { padding: 24px 16px; }
  .result-score { font-size: 2.8rem; }

  /* Modals/Overlays — near full screen */
  .detail-overlay.active { padding: 0.5rem; }
  .detail-panel {
    max-width: 100% !important;
    width: 100% !important;
    border-radius: 16px;
    padding: 20px;
    max-height: 95vh;
    overflow-y: auto;
  }
  .detail-panel .close-btn {
    position: sticky;
    top: 0;
    z-index: 10;
    float: right;
    width: 40px;
    height: 40px;
    font-size: 1.3rem;
  }

  .modal {
    width: 95% !important;
    max-width: 100% !important;
    padding: 20px;
    max-height: 90vh;
    overflow-y: auto;
  }

  /* Form inputs */
  .form-item select,
  .form-item input[type="number"],
  .form-group input,
  .form-group textarea,
  .form-group select,
  select,
  input[type="text"],
  input[type="number"],
  input[type="password"],
  input[type="date"],
  textarea {
    font-size: 16px !important; /* prevent iOS zoom */
    min-height: 44px;
    width: 100%;
  }
  .form-item {
    flex-wrap: wrap;
    gap: 8px;
    padding: 10px 0;
  }
  .form-item label { flex: 1 1 100%; }
  .form-item select { min-width: 100% !important; }

  /* Sliders — touch friendly */
  .range-row input[type=range] { height: 8px; }
  .range-row input[type=range]::-webkit-slider-thumb {
    width: 28px !important;
    height: 28px !important;
  }

  /* Buttons */
  .compute-btn,
  .btn-primary,
  .pay-btn {
    min-height: 48px;
    font-size: 1rem;
  }
  .paywall-buttons {
    flex-direction: column !important;
  }
  .pay-btn { width: 100%; justify-content: center; }

  /* Upload zone */
  .upload-zone {
    padding: 36px 16px;
    width: 100%;
  }
  .upload-zone .icon { font-size: 2.5rem; }

  /* Values grid (analyze page) */
  .values-grid {
    grid-template-columns: 1fr 1fr !important;
    gap: 8px;
  }

  /* Score items (analyze page) */
  .score-item { flex-wrap: wrap; gap: 8px; padding: 14px; }

  /* About page grids */
  .fhe-diagram { flex-direction: column; gap: 8px; }
  .fhe-step { max-width: 100%; min-width: auto; }
  .fhe-arrow { transform: rotate(90deg); }

  .compliance-grid { grid-template-columns: 1fr !important; }
  .tech-grid { grid-template-columns: 1fr 1fr !important; }
  .score-grid:not(.disease-grid) { grid-template-columns: 1fr !important; }

  /* About page score cards spanning fix */
  .score-card[style*="grid-column: span 2"] {
    grid-column: span 1 !important;
  }

  /* Dashboard */
  .dash-grid { grid-template-columns: 1fr !important; }
  .header { flex-wrap: wrap; gap: 8px; }
  .header-right { width: 100%; justify-content: space-between; }
  .nav-links { display: none !important; }

  .patient-card { padding: 12px 16px; }
  .score-field-row { grid-template-columns: 1fr !important; gap: 4px; }

  .filter-bar { flex-wrap: wrap; }

  /* Trust bar */
  .trust-bar { gap: 4px; }
  .trust-badge { font-size: 0.62rem; padding: 3px 8px; }

  /* About links */
  .about-links { flex-direction: column; }
  .about-links a { width: 100%; text-align: center; min-height: 44px; display: flex; align-items: center; justify-content: center; }

  /* Footer */
  .footer-links { flex-wrap: wrap; gap: 12px; justify-content: center; }

  /* Prevent horizontal scroll */
  html, body { overflow-x: hidden; }
  * { max-width: 100vw; }
}

/* ══════════════════════════════════
   PHONE — max-width: 480px
   ══════════════════════════════════ */
@media (max-width: 480px) {
  h1, .header h1, .header-logo h1, .hero h1 {
    font-size: 1.4rem !important;
  }
  .hero h1 { font-size: 1.5rem !important; }

  .stats-bar { gap: 12px; padding: 12px; }
  .stat .num { font-size: 1.1rem; }
  .stat .label { font-size: 0.6rem; }

  /* Disease cards — still 2 col but tighter */
  .disease-grid {
    gap: 8px;
  }
  .disease-card {
    padding: 16px 10px 14px;
  }
  .disease-card .emoji { font-size: 1.5rem; margin-bottom: 8px; }
  .disease-card .name { font-size: 0.82rem; }
  .disease-card .desc { font-size: 0.68rem; }
  .disease-card .tag { font-size: 0.5rem; padding: 1px 6px; }

  .score-grid { gap: 8px; }

  /* Cards (criteria) — 1 column */
  .cards {
    grid-template-columns: 1fr !important;
  }

  .values-grid { grid-template-columns: 1fr !important; }

  .result-score { font-size: 2.2rem; }

  .calc-panel { padding: 16px; }

  /* Buttons full width */
  .compute-btn { padding: 14px; }
  .btn { width: 100%; justify-content: center; }

  .tech-grid { grid-template-columns: 1fr !important; }

  .login-box { padding: 24px 16px; }
  #login-section h1 { font-size: 1.8rem !important; }

  .privacy-badges { flex-direction: column; align-items: stretch; }
  .badge { text-align: center; }

  .about { padding: 20px; }
  .disclaimer { padding: 12px; font-size: 0.72rem; }
}

/* ══════════════════════════════════
   SMALL PHONE — max-width: 360px
   ══════════════════════════════════ */
@media (max-width: 360px) {
  .container { padding: 10px; }

  h1, .header h1, .header-logo h1, .hero h1 {
    font-size: 1.2rem !important;
  }

  .header-logo .icon { width: 40px; height: 40px; font-size: 1.2rem; }
  .header-logo { gap: 8px; }

  .disease-grid {
    grid-template-columns: 1fr 1fr;
    gap: 6px;
  }
  .disease-card { padding: 12px 8px 10px; }
  .disease-card .emoji { font-size: 1.3rem; }
  .disease-card .name { font-size: 0.76rem; }
  .disease-card .count { font-size: 0.6rem; padding: 2px 6px; }

  .trust-badge { font-size: 0.58rem; padding: 2px 6px; }

  .score-card .name { font-size: 0.82rem; }

  .mobile-menu { width: 260px; }
}