/* Tide to Knowledge — Premium Design System */
/* Sourced from peptideinitiative.com and site best practices */

:root {
  --navy: #050d1a;
  --deep: #071424;
  --dark: #0a1f35;
  --mid: #0e2a44;
  --teal-deep: #006d8f;
  --teal: #0096b4;
  --teal-bright: #00b8d9;
  --teal-light: #4dd9f5;
  --accent: #00e5ff;
  --gold: #f0b429;
  --green: #22c55e;
  --amber: #f59e0b;
  --purple: #8b5cf6;
  --red: #ef4444;
  --text-primary: #f0f6fc;
  --text-secondary: #8ba8c0;
  --text-muted: #4a6a82;
  --glass: rgba(14,42,68,0.6);
  --glass-border: rgba(0,180,220,0.15);
  --glass-hover: rgba(0,180,220,0.08);
  --card: rgba(10,31,53,0.8);
  --radius: 12px;
  --radius-lg: 18px;
  --shadow: 0 4px 24px rgba(0,0,0,0.4);
  --shadow-glow: 0 0 30px rgba(0,180,220,0.15);
}

* { margin:0; padding:0; box-sizing:border-box; }
html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--navy);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
}

/* Background */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse at 20% 20%, rgba(0,150,180,0.08) 0%, transparent 60%),
    radial-gradient(ellipse at 80% 80%, rgba(0,109,143,0.06) 0%, transparent 60%),
    linear-gradient(180deg, #050d1a 0%, #071424 40%, #050d1a 100%);
  z-index: -1;
  pointer-events: none;
}

/* Typography */
h1 { font-size: clamp(2rem, 5vw, 3.5rem); font-weight: 700; line-height: 1.1; }
h2 { font-size: clamp(1.5rem, 3vw, 2.2rem); font-weight: 700; }
h3 { font-size: 1.2rem; font-weight: 600; }
p { line-height: 1.7; color: var(--text-secondary); }

/* Scrollbar */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--deep); }
::-webkit-scrollbar-thumb { background: var(--teal-deep); border-radius: 3px; }

/* ─── NAV ─── */
nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(5,13,26,0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--glass-border);
  padding: 0 2rem;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  cursor: pointer;
}

.nav-logo-wave {
  width: 44px;
  height: 44px;
}

.nav-brand {
  display: flex;
  flex-direction: column;
}

.nav-brand-name {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
  line-height: 1.1;
}

.nav-brand-sub {
  font-size: 0.65rem;
  color: var(--teal-bright);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-weight: 500;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
}

.nav-links a, .nav-links button {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.82rem;
  font-weight: 500;
  padding: 6px 10px;
  border-radius: 8px;
  transition: all 0.2s;
  background: none;
  border: none;
  cursor: pointer;
  white-space: nowrap;
}

.nav-links a:hover, .nav-links button:hover,
.nav-links a.active, .nav-links button.active {
  color: var(--teal-bright);
  background: rgba(0,184,217,0.1);
}

/* ─── MAIN CONTENT ─── */
#app {
  padding-top: 64px;
  min-height: 100vh;
}

/* ─── HERO ─── */
.hero {
  padding: 80px 2rem 60px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero-bg-wave {
  position: absolute;
  inset: 0;
  background: url('hero-bg.jpg') center/cover no-repeat;
  opacity: 0.18;
  pointer-events: none;
  z-index: 0;
}

.hero > *:not(.hero-bg-wave) {
  position: relative;
  z-index: 1;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: 100px;
  border: 1px solid rgba(0,184,217,0.3);
  background: rgba(0,184,217,0.08);
  color: var(--teal-bright);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 24px;
}

.hero h1 {
  background: linear-gradient(135deg, #ffffff 0%, #a0d4e8 50%, var(--teal-bright) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 20px;
}

.hero p {
  font-size: 1.1rem;
  max-width: 600px;
  margin: 0 auto 36px;
  color: var(--text-secondary);
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 40px;
  flex-wrap: wrap;
  margin-bottom: 44px;
}

.hero-stat {
  text-align: center;
}

.hero-stat-num {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--teal-bright);
  display: block;
  line-height: 1;
}

.hero-stat-label {
  font-size: 0.78rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-top: 4px;
}

.hero-nav-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 12px;
  max-width: 900px;
  margin: 0 auto;
}

.hero-nav-card {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 20px 16px;
  cursor: pointer;
  transition: all 0.25s;
  text-align: center;
}

.hero-nav-card:hover {
  background: rgba(0,184,217,0.1);
  border-color: rgba(0,184,217,0.4);
  transform: translateY(-3px);
  box-shadow: var(--shadow-glow);
}

.hero-nav-card-icon { font-size: 1.8rem; margin-bottom: 8px; }
.hero-nav-card-label { font-size: 0.82rem; font-weight: 600; color: var(--text-primary); }
.hero-nav-card-count { font-size: 0.72rem; color: var(--teal); margin-top: 2px; }

/* ─── SECTIONS ─── */
.section {
  max-width: 1200px;
  margin: 0 auto;
  padding: 40px 2rem 60px;
}

.section-header {
  margin-bottom: 32px;
}

.section-header h2 {
  margin-bottom: 8px;
}

.section-header p {
  font-size: 0.95rem;
}

/* ─── SEARCH BAR ─── */
.search-row {
  display: flex;
  gap: 12px;
  margin-bottom: 24px;
  flex-wrap: wrap;
  align-items: center;
}

.search-input-wrap {
  position: relative;
  flex: 1;
  min-width: 220px;
}

.search-input-wrap svg {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
}

.search-input {
  width: 100%;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 11px 16px 11px 42px;
  color: var(--text-primary);
  font-size: 0.9rem;
  outline: none;
  transition: border-color 0.2s;
}

.search-input:focus { border-color: var(--teal); }
.search-input::placeholder { color: var(--text-muted); }

.filter-chips {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}

.chip {
  padding: 6px 14px;
  border-radius: 100px;
  border: 1px solid var(--glass-border);
  background: var(--glass);
  color: var(--text-secondary);
  font-size: 0.78rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  white-space: nowrap;
}

.chip:hover { border-color: var(--teal); color: var(--teal-bright); }
.chip.active {
  background: rgba(0,184,217,0.15);
  border-color: var(--teal);
  color: var(--teal-bright);
}

/* ─── PEPTIDE GRID ─── */
.peptide-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 16px;
}

.peptide-card {
  background: var(--card);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 20px;
  cursor: pointer;
  transition: all 0.25s;
  position: relative;
  overflow: hidden;
}

.peptide-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--teal-deep), var(--teal-bright));
  opacity: 0;
  transition: opacity 0.25s;
}

.peptide-card:hover {
  border-color: rgba(0,184,217,0.35);
  transform: translateY(-2px);
  box-shadow: var(--shadow), var(--shadow-glow);
}

.peptide-card:hover::before { opacity: 1; }

.peptide-card-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 10px;
  gap: 8px;
}

.peptide-card-name {
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.2;
}

.peptide-card-tag {
  font-size: 0.68rem;
  font-weight: 600;
  color: var(--teal);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  white-space: nowrap;
  flex-shrink: 0;
}

.peptide-card-cats {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  margin-bottom: 10px;
}

.cat-pill {
  font-size: 0.7rem;
  padding: 2px 10px;
  border-radius: 100px;
  background: rgba(0,150,180,0.15);
  border: 1px solid rgba(0,150,180,0.25);
  color: var(--teal-light);
  font-weight: 500;
}

.peptide-card-desc {
  font-size: 0.82rem;
  line-height: 1.6;
  color: var(--text-secondary);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 12px;
}

.peptide-card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* Evidence Badges */
.evidence-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.68rem;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 100px;
  letter-spacing: 0.03em;
}

.evidence-badge.fda { background: rgba(34,197,94,0.15); color: #22c55e; border: 1px solid rgba(34,197,94,0.3); }
.evidence-badge.moderate { background: rgba(245,158,11,0.15); color: #f59e0b; border: 1px solid rgba(245,158,11,0.3); }
.evidence-badge.strong { background: rgba(59,130,246,0.15); color: #60a5fa; border: 1px solid rgba(59,130,246,0.3); }
.evidence-badge.emerging { background: rgba(139,92,246,0.15); color: #a78bfa; border: 1px solid rgba(139,92,246,0.3); }

.peptide-card-admin {
  font-size: 0.72rem;
  color: var(--text-muted);
}

/* ─── PEPTIDE MODAL / DETAIL ─── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.75);
  backdrop-filter: blur(8px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  animation: fadeIn 0.2s ease;
}

@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

.peptide-modal {
  background: var(--dark);
  border: 1px solid rgba(0,184,217,0.25);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 720px;
  max-height: 88vh;
  overflow-y: auto;
  box-shadow: 0 24px 80px rgba(0,0,0,0.6), 0 0 60px rgba(0,150,180,0.1);
  animation: slideUp 0.25s ease;
}

@keyframes slideUp { from { transform: translateY(30px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }

.modal-header {
  position: sticky;
  top: 0;
  background: var(--dark);
  border-bottom: 1px solid var(--glass-border);
  padding: 20px 24px 16px;
  z-index: 10;
}

.modal-title-row {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 8px;
}

.modal-title {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-primary);
}

.modal-close {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: rgba(255,255,255,0.08);
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all 0.2s;
  font-size: 1.1rem;
}

.modal-close:hover { background: rgba(255,255,255,0.15); color: var(--text-primary); }

.modal-aliases {
  font-size: 0.78rem;
  color: var(--teal);
  margin-bottom: 10px;
}

/* Tabs */
.tab-nav {
  display: flex;
  gap: 4px;
  border-bottom: 1px solid var(--glass-border);
  padding: 0 24px;
  background: var(--deep);
  overflow-x: auto;
}

.tab-btn {
  padding: 10px 16px;
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 0.82rem;
  font-weight: 500;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: all 0.2s;
  white-space: nowrap;
}

.tab-btn:hover { color: var(--text-secondary); }
.tab-btn.active { color: var(--teal-bright); border-bottom-color: var(--teal-bright); }

.tab-content {
  padding: 24px;
}

.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* Modal data sections */
.modal-section { margin-bottom: 22px; }
.modal-section-title {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--teal);
  font-weight: 700;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.modal-section-title::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--glass-border);
}

.modal-text { font-size: 0.88rem; line-height: 1.7; color: var(--text-secondary); }

/* Dosing tiers */
.dosing-tiers {
  display: grid;
  gap: 10px;
}

.dosing-tier {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 14px;
  position: relative;
}

.dosing-tier-label {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 6px;
}

.dosing-tier.beginner .dosing-tier-label { color: var(--green); }
.dosing-tier.standard .dosing-tier-label { color: var(--amber); }
.dosing-tier.advanced .dosing-tier-label { color: var(--teal-bright); }

.dosing-tier-dose {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 2px;
}

.dosing-tier-details {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.dosing-tier-note {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 6px;
  font-style: italic;
}

/* Timeline */
.timeline {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.timeline-item {
  display: flex;
  gap: 16px;
  position: relative;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: 11px;
  top: 24px;
  bottom: -8px;
  width: 1px;
  background: var(--glass-border);
}

.timeline-item:last-child::before { display: none; }

.timeline-dot {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--teal-deep);
  border: 2px solid var(--teal);
  flex-shrink: 0;
  margin-top: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.timeline-dot::after {
  content: '';
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--teal-bright);
}

.timeline-body {
  padding: 12px 0 20px;
}

.timeline-period {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--teal);
  margin-bottom: 4px;
}

.timeline-text {
  font-size: 0.83rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Research citations */
.research-list { display: flex; flex-direction: column; gap: 10px; }

.research-item {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 14px;
}

.research-title {
  font-size: 0.83rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 3px;
  font-style: italic;
}

.research-meta {
  font-size: 0.72rem;
  color: var(--teal);
  margin-bottom: 6px;
}

.research-finding {
  font-size: 0.8rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* Pairs / interactions */
.pairs-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.pair-tag {
  padding: 5px 14px;
  border-radius: 100px;
  background: rgba(0,150,180,0.1);
  border: 1px solid rgba(0,150,180,0.25);
  color: var(--teal-light);
  font-size: 0.78rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
}

.pair-tag:hover {
  background: rgba(0,150,180,0.25);
  border-color: var(--teal);
}

/* Avoid list */
.avoid-list {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.avoid-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.83rem;
  color: var(--text-secondary);
}

.avoid-item::before {
  content: '⚠';
  font-size: 0.8rem;
  color: var(--gold);
}

/* Molecular data */
.mol-data {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 8px;
}

.mol-item {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: 8px;
  padding: 10px;
}

.mol-label {
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 3px;
}

.mol-value {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-primary);
  font-family: 'Courier New', monospace;
}

/* ─── PROTOCOLS ─── */
.protocols-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 16px;
}

.protocol-card {
  background: var(--card);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all 0.25s;
}

.protocol-card:hover {
  border-color: rgba(0,184,217,0.3);
  box-shadow: var(--shadow-glow);
}

.protocol-card-header {
  padding: 18px 20px 14px;
  background: rgba(0,180,220,0.04);
  border-bottom: 1px solid var(--glass-border);
  cursor: pointer;
  display: flex;
  align-items: flex-start;
  gap: 14px;
}

.protocol-icon {
  font-size: 1.8rem;
  flex-shrink: 0;
  line-height: 1;
  margin-top: 2px;
}

.protocol-card-info { flex: 1; min-width: 0; }

.protocol-card-name {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.protocol-card-cat {
  font-size: 0.7rem;
  color: var(--teal);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.protocol-card-desc {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.55;
  margin-top: 8px;
}

.protocol-expand-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px;
  font-size: 1.1rem;
  transition: all 0.2s;
  flex-shrink: 0;
}

.protocol-expand-btn:hover { color: var(--teal-bright); }

.protocol-card-body {
  display: none;
  padding: 0;
}

.protocol-card-body.open { display: block; }

.protocol-tiers {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.protocol-tier {
  padding: 16px 20px;
  border-bottom: 1px solid var(--glass-border);
}

.protocol-tier:last-child { border-bottom: none; }

.protocol-tier-label {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.protocol-tier.beginner .protocol-tier-label { color: var(--green); }
.protocol-tier.standard .protocol-tier-label { color: var(--amber); }
.protocol-tier.advanced .protocol-tier-label { color: var(--teal-bright); }
.protocol-tier.glp1 .protocol-tier-label { color: var(--purple); }

.protocol-tier-label::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
}

.protocol-peptides {
  display: flex;
  flex-direction: column;
  gap: 5px;
  margin-bottom: 10px;
}

.protocol-peptide-item {
  font-size: 0.8rem;
  color: var(--text-secondary);
  display: flex;
  align-items: baseline;
  gap: 6px;
}

.protocol-peptide-item::before {
  content: '→';
  color: var(--teal);
  flex-shrink: 0;
  font-size: 0.75rem;
}

.protocol-meta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: 8px;
}

.protocol-meta-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.protocol-meta-label {
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}

.protocol-meta-val {
  font-size: 0.78rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.protocol-note {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-style: italic;
  margin-top: 8px;
  padding-top: 8px;
  border-top: 1px solid var(--glass-border);
}

.protocol-key-peptides {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  padding: 12px 20px;
  border-top: 1px solid var(--glass-border);
}

.kp-label { font-size: 0.7rem; color: var(--text-muted); line-height: 1.8; }

/* ─── HOW-TO GUIDES ─── */
.guides-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 14px;
  margin-bottom: 40px;
}

.guide-card {
  background: var(--card);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  cursor: pointer;
  transition: all 0.25s;
}

.guide-card:hover {
  border-color: rgba(0,184,217,0.35);
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

.guide-card-inner { padding: 20px; }

.guide-icon {
  font-size: 2rem;
  margin-bottom: 12px;
  display: block;
}

.guide-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.guide-summary {
  font-size: 0.8rem;
  color: var(--text-secondary);
  line-height: 1.55;
}

.guide-detail {
  display: none;
  border-top: 1px solid var(--glass-border);
  padding: 20px;
}

.guide-detail.open { display: block; }

.guide-step { margin-bottom: 16px; }
.guide-step-heading {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--teal-bright);
  margin-bottom: 4px;
}
.guide-step-text {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Video section */
.video-section {
  background: var(--card);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  margin-top: 8px;
}

.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 12px;
  margin-top: 16px;
}

.video-card {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.video-card-thumb {
  width: 100%;
  aspect-ratio: 16/9;
  background: rgba(0,100,130,0.2);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
}

.video-card-title {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-primary);
}

.video-card-dur {
  font-size: 0.72rem;
  color: var(--teal);
}

/* ─── CALCULATOR ─── */
.calculator-wrap {
  max-width: 680px;
  margin: 0 auto;
}

.calc-card {
  background: var(--card);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 32px;
}

.calc-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 20px;
  margin-bottom: 28px;
}

.calc-field label {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 8px;
}

.calc-input {
  width: 100%;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 12px 16px;
  color: var(--text-primary);
  font-size: 1.1rem;
  font-weight: 600;
  outline: none;
  transition: border-color 0.2s;
  text-align: center;
}

.calc-input:focus { border-color: var(--teal); }

.calc-input-unit {
  text-align: center;
  font-size: 0.72rem;
  color: var(--text-muted);
  margin-top: 5px;
}

.calc-result {
  background: rgba(0,180,220,0.06);
  border: 1px solid rgba(0,180,220,0.2);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 24px;
}

.calc-result-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  text-align: center;
}

.calc-result-item .calc-result-num {
  font-size: 2rem;
  font-weight: 800;
  color: var(--teal-bright);
  display: block;
  line-height: 1.1;
}

.calc-result-item .calc-result-label {
  font-size: 0.72rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-top: 4px;
}

.calc-highlight {
  text-align: center;
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--glass-border);
}

.calc-highlight-num {
  font-size: 3.5rem;
  font-weight: 900;
  color: var(--accent);
  line-height: 1;
}

.calc-highlight-label {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-top: 6px;
}

.calc-ref {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 16px;
}

.calc-ref-title {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--teal);
  margin-bottom: 10px;
}

.calc-ref-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: 6px;
}

.calc-ref-item {
  font-size: 0.75rem;
  color: var(--text-secondary);
  padding: 5px 10px;
  background: rgba(0,0,0,0.2);
  border-radius: 6px;
}

.calc-ref-item span {
  color: var(--teal-light);
  font-weight: 600;
}

/* ─── BLOG ─── */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 16px;
}

.blog-card {
  background: var(--card);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  cursor: pointer;
  transition: all 0.25s;
}

.blog-card:hover {
  border-color: rgba(0,184,217,0.3);
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

.blog-card-header {
  background: linear-gradient(135deg, rgba(0,80,110,0.5), rgba(0,40,70,0.5));
  padding: 24px;
  min-height: 120px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
}

.blog-cat {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 3px 10px;
  border-radius: 100px;
  width: fit-content;
  margin-bottom: 10px;
}

.blog-cat.NEWS { background: rgba(34,197,94,0.2); color: #22c55e; }
.blog-cat.RESEARCH { background: rgba(59,130,246,0.2); color: #60a5fa; }
.blog-cat.COMPARISON { background: rgba(245,158,11,0.2); color: #f59e0b; }
.blog-cat.GUIDE { background: rgba(139,92,246,0.2); color: #a78bfa; }

.blog-card-title {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.35;
}

.blog-card-body {
  padding: 16px 20px 20px;
}

.blog-card-excerpt {
  font-size: 0.8rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 12px;
}

.blog-card-date {
  font-size: 0.72rem;
  color: var(--text-muted);
}

.blog-full {
  display: none;
  padding: 20px;
  border-top: 1px solid var(--glass-border);
}

.blog-full.open { display: block; }

.blog-full-text {
  font-size: 0.85rem;
  line-height: 1.8;
  color: var(--text-secondary);
}

/* ─── FAQ ─── */
.faq-list { display: flex; flex-direction: column; gap: 8px; }

.faq-item {
  background: var(--card);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color 0.2s;
}

.faq-item:hover { border-color: rgba(0,184,217,0.3); }
.faq-item.open { border-color: rgba(0,184,217,0.3); }

.faq-q {
  width: 100%;
  background: none;
  border: none;
  padding: 16px 20px;
  text-align: left;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  gap: 12px;
}

.faq-q-text {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.4;
}

.faq-arrow {
  color: var(--teal);
  font-size: 1rem;
  flex-shrink: 0;
  transition: transform 0.2s;
}

.faq-item.open .faq-arrow { transform: rotate(180deg); }

.faq-a {
  display: none;
  padding: 0 20px 16px;
}

.faq-item.open .faq-a { display: block; }

.faq-a p {
  font-size: 0.85rem;
  line-height: 1.75;
  color: var(--text-secondary);
}

/* ─── GLOSSARY ─── */
.glossary-list { display: flex; flex-direction: column; gap: 0; }

.glossary-item {
  padding: 14px 0;
  border-bottom: 1px solid var(--glass-border);
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.glossary-item:last-child { border-bottom: none; }

.glossary-term {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--teal-bright);
  min-width: 180px;
  flex-shrink: 0;
}

.glossary-def {
  font-size: 0.83rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ─── RESULTS COUNT ─── */
.results-count {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.results-count span { color: var(--teal); font-weight: 600; }

/* ─── FOOTER ─── */
footer {
  background: var(--deep);
  border-top: 1px solid var(--glass-border);
  padding: 40px 2rem 30px;
  margin-top: 60px;
}

.footer-grid {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 32px;
}

.footer-brand p {
  font-size: 0.82rem;
  line-height: 1.7;
  color: var(--text-muted);
  margin-top: 12px;
}

.footer-col h4 {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--teal);
  margin-bottom: 14px;
  font-weight: 700;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-links a, .footer-links button {
  font-size: 0.82rem;
  color: var(--text-muted);
  text-decoration: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  text-align: left;
  transition: color 0.2s;
}

.footer-links a:hover, .footer-links button:hover { color: var(--teal-bright); }

.footer-bottom {
  max-width: 1200px;
  margin: 0 auto;
  padding-top: 20px;
  border-top: 1px solid var(--glass-border);
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 20px;
  flex-wrap: wrap;
}

.footer-disclaimer {
  font-size: 0.73rem;
  color: var(--text-muted);
  line-height: 1.6;
  max-width: 680px;
}

.footer-copy {
  font-size: 0.73rem;
  color: var(--text-muted);
  white-space: nowrap;
}

/* ─── UTILITY ─── */
.hidden { display: none !important; }
.text-teal { color: var(--teal-bright); }
.text-muted { color: var(--text-muted); }

.divider {
  height: 1px;
  background: var(--glass-border);
  margin: 24px 0;
}

.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-muted);
}

.empty-state-icon { font-size: 3rem; margin-bottom: 12px; }
.empty-state p { font-size: 0.9rem; }

/* ─── RESPONSIVE ─── */
@media (max-width: 900px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 24px; }
  .calc-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 640px) {
  nav { padding: 0 1rem; }
  .nav-links { display: none; }

  /* Hero */
  .hero { padding: 50px 1rem 32px; }
  .hero h1 { font-size: 2rem; }
  .hero p { font-size: 0.9rem; }
  .hero-stats { gap: 24px; }
  .hero-stat-num { font-size: 1.8rem; }

  /* Hero nav cards — 2-column, equal rows */
  .hero-nav-cards {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
  }
  .hero-nav-card { padding: 16px 12px; }
  .hero-nav-card-icon { font-size: 1.5rem; margin-bottom: 6px; }
  .hero-nav-card-label { font-size: 0.78rem; }

  /* Fix the large gap below hero disclaimer */
  .hero > div[style*="margin-top:36px"] {
    margin-top: 20px !important;
    margin-bottom: 0 !important;
  }

  /* Sections */
  .section { padding: 24px 1rem 32px; }

  /* Footer — tighter on mobile */
  footer { padding: 28px 1rem 20px; margin-top: 32px; }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 20px;
    margin-bottom: 20px;
  }
  .footer-bottom { flex-direction: column; gap: 12px; }
  .footer-disclaimer { font-size: 0.72rem; }

  /* Other */
  .calc-grid { grid-template-columns: 1fr; }
  .calc-result-grid { grid-template-columns: 1fr; gap: 12px; }
  .glossary-item { flex-direction: column; gap: 4px; }
  .glossary-term { min-width: 0; }
  .mol-data { grid-template-columns: repeat(2, 1fr); }
  .protocols-grid { grid-template-columns: 1fr; }
  .peptide-grid { grid-template-columns: 1fr; }
  .blog-grid { grid-template-columns: 1fr; }
  .guides-grid { grid-template-columns: 1fr; }
  .video-grid { grid-template-columns: 1fr; }
  .peptide-modal { max-height: 95vh; }
  .tab-nav { padding: 0 12px; }
  .tab-content { padding: 16px; }
  .filter-chips { gap: 6px; }
  .chip { font-size: 0.72rem; padding: 5px 10px; }
  .calc-tab-btn { font-size: 0.72rem; padding: 6px 10px; }
}

/* ─── MOBILE NAV TOGGLE ─── */
.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 1.4rem;
  cursor: pointer;
}

@media (max-width: 640px) {
  .mobile-menu-btn { display: flex; align-items: center; }
}

.mobile-nav {
  display: none;
  position: fixed;
  top: 64px;
  left: 0;
  right: 0;
  background: rgba(5,13,26,0.97);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--glass-border);
  padding: 12px;
  z-index: 999;
  flex-direction: column;
  gap: 4px;
}

.mobile-nav.open { display: flex; }

.mobile-nav button {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 0.9rem;
  padding: 10px 14px;
  text-align: left;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s;
}

.mobile-nav button:hover, .mobile-nav button.active {
  color: var(--teal-bright);
  background: rgba(0,184,217,0.1);
}

/* Calculator tab buttons */
.calc-tab-btn {
  padding: 8px 16px;
  border-radius: 100px;
  border: 1px solid var(--glass-border);
  background: var(--glass);
  color: var(--text-secondary);
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  white-space: nowrap;
}

.calc-tab-btn:hover {
  border-color: var(--teal);
  color: var(--teal-bright);
}

.calc-tab-btn.active {
  background: rgba(0,184,217,0.15);
  border-color: var(--teal);
  color: var(--teal-bright);
}

.calc-tab-desc {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--glass-border);
}

.calc-key-ref {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 6px;
  margin-top: 16px;
  padding: 14px;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.calc-warning {
  margin-top: 12px;
  padding: 10px 14px;
  background: rgba(245,158,11,0.1);
  border: 1px solid rgba(245,158,11,0.3);
  border-radius: 8px;
  font-size: 0.78rem;
  color: #f59e0b;
}

.calc-info-box {
  margin-top: 12px;
  padding: 10px 14px;
  background: rgba(0,184,217,0.08);
  border: 1px solid rgba(0,184,217,0.25);
  border-radius: 8px;
  font-size: 0.78rem;
  color: var(--teal-light);
  line-height: 1.5;
}

/* Calc button */
.calc-btn {
  width: 100%;
  padding: 14px;
  background: linear-gradient(135deg, var(--teal-deep), var(--teal));
  border: none;
  border-radius: var(--radius);
  color: white;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s;
  letter-spacing: 0.02em;
  margin-bottom: 20px;
}

.calc-btn:hover {
  background: linear-gradient(135deg, var(--teal), var(--teal-bright));
  transform: translateY(-1px);
}

/* ─── PARTNERS ─── */
.partners-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 20px;
  margin-bottom: 8px;
}

.partner-card {
  background: var(--card);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: all 0.25s;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.partner-card:hover {
  border-color: rgba(0,184,217,0.35);
  box-shadow: var(--shadow-glow);
  transform: translateY(-2px);
}

.partner-featured {
  border-color: rgba(0,184,217,0.3);
  background: linear-gradient(135deg, rgba(0,150,180,0.08) 0%, var(--card) 60%);
}

.partner-card-top {
  display: flex;
  align-items: center;
  gap: 14px;
}

.partner-icon {
  font-size: 2.2rem;
  flex-shrink: 0;
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,150,180,0.12);
  border-radius: 12px;
  border: 1px solid rgba(0,150,180,0.2);
}

.partner-info { flex: 1; }

.partner-name {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 3px;
}

.partner-category {
  font-size: 0.72rem;
  color: var(--teal);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.partner-badge {
  font-size: 0.65rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 100px;
  background: rgba(0,184,217,0.15);
  border: 1px solid rgba(0,184,217,0.35);
  color: var(--teal-bright);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  flex-shrink: 0;
}

.partner-desc {
  font-size: 0.85rem;
  line-height: 1.7;
  color: var(--text-secondary);
  margin: 0;
}

.partner-code-block {
  background: rgba(0,0,0,0.25);
  border: 1px solid rgba(0,184,217,0.2);
  border-radius: var(--radius);
  padding: 14px 16px;
}

.partner-code-label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--teal);
  font-weight: 700;
  margin-bottom: 10px;
}

.partner-code-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
}

.partner-code {
  font-size: 1.6rem;
  font-weight: 900;
  color: var(--accent);
  letter-spacing: 0.12em;
  font-family: 'Courier New', monospace;
  flex: 1;
}

.partner-copy-btn {
  padding: 7px 16px;
  border-radius: 8px;
  background: rgba(0,184,217,0.12);
  border: 1px solid rgba(0,184,217,0.3);
  color: var(--teal-bright);
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  white-space: nowrap;
}

.partner-copy-btn:hover {
  background: rgba(0,184,217,0.25);
  border-color: var(--teal);
}

.partner-discount {
  font-size: 0.8rem;
  color: var(--green);
  font-weight: 600;
}

.partner-visit-btn {
  display: block;
  text-align: center;
  padding: 11px 20px;
  background: linear-gradient(135deg, var(--teal-deep), var(--teal));
  border-radius: var(--radius);
  color: white;
  font-size: 0.88rem;
  font-weight: 700;
  text-decoration: none;
  transition: all 0.2s;
  margin-top: auto;
  letter-spacing: 0.02em;
}

.partner-visit-btn:hover {
  background: linear-gradient(135deg, var(--teal), var(--teal-bright));
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(0,180,220,0.3);
}

@media (max-width: 640px) {
  .partners-grid { grid-template-columns: 1fr; }
  .partner-code { font-size: 1.3rem; }
}

/* Source attribution */
.source-attr {
  font-size: 0.7rem;
  color: var(--text-muted);
  margin-top: 8px;
  font-style: italic;
}

.source-attr a { color: var(--teal); text-decoration: none; }
.source-attr a:hover { text-decoration: underline; }

/* Tags on protocol cards */
.protocol-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  padding: 10px 20px 14px;
}

.protocol-tag {
  font-size: 0.68rem;
  padding: 2px 9px;
  border-radius: 100px;
  background: rgba(0,100,130,0.15);
  border: 1px solid rgba(0,100,130,0.2);
  color: var(--text-muted);
}