/* ===== RESET & BASE ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:          #0d0d0d;
  --bg-2:        #141414;
  --bg-3:        #1a1a1a;
  --bg-4:        #222;
  --border:      #2a2a2a;
  --border-2:    #333;
  --text:        #e8e8e8;
  --text-2:      #999;
  --text-3:      #666;
  --accent:      #00d4ff;
  --accent-dim:  rgba(0,212,255,0.12);
  --accent-dim2: rgba(0,212,255,0.06);
  --green:       #4ade80;
  --green-dim:   rgba(74,222,128,0.12);
  --amber:       #fbbf24;
  --amber-dim:   rgba(251,191,36,0.12);
  --red:         #f87171;
  --red-dim:     rgba(248,113,113,0.12);
  --violet:      #a78bfa;
  --violet-dim:  rgba(167,139,250,0.12);
  --radius:      8px;
  --radius-lg:   12px;
  --radius-full: 999px;
  --shadow:      0 4px 24px rgba(0,0,0,0.5);
  --transition:  0.15s ease;
}

html { font-size: 15px; scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ===== NAV ===== */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(13,13,13,0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 1.5rem;
  height: 52px;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.nav-logo {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--text);
  text-decoration: none;
  white-space: nowrap;
}
.nav-logo:hover { color: var(--accent); text-decoration: none; }

.nav-sep { color: var(--text-3); font-size: 1.1rem; }

.nav-title {
  color: var(--text-2);
  font-size: 0.9rem;
  flex: 1;
}

.nav-actions {
  display: flex;
  gap: 0.5rem;
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.4rem 0.9rem;
  border-radius: var(--radius);
  font-family: inherit;
  font-size: 0.82rem;
  font-weight: 500;
  cursor: pointer;
  border: 1px solid transparent;
  transition: var(--transition);
  white-space: nowrap;
}

.btn-ghost {
  background: transparent;
  color: var(--text-2);
  border-color: var(--border-2);
}
.btn-ghost:hover {
  background: var(--bg-4);
  color: var(--text);
  border-color: var(--border-2);
}

.btn-primary {
  background: var(--accent);
  color: #000;
  border-color: var(--accent);
  font-weight: 600;
}
.btn-primary:hover { opacity: 0.88; }

.btn-add {
  background: var(--accent-dim);
  color: var(--accent);
  border-color: rgba(0,212,255,0.2);
  padding: 0.25rem 0.6rem;
  font-size: 0.78rem;
  flex-shrink: 0;
}
.btn-add:hover { background: rgba(0,212,255,0.2); }
.btn-add.in-stack {
  background: var(--accent);
  color: #000;
  border-color: var(--accent);
}
.btn-add.in-stack:hover { background: var(--red); border-color: var(--red); color: #fff; }

/* ===== HERO ===== */
.hero {
  text-align: center;
  padding: 3rem 1.5rem 2.5rem;
  max-width: 1400px;
  margin: 0 auto;
}

.hero-title {
  font-family: 'Playfair Display', Georgia, serif;
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 0.75rem;
  color: var(--text);
}

.accent { color: var(--accent); }

.hero-sub {
  color: var(--text-2);
  font-size: 1rem;
  max-width: 520px;
  margin: 0 auto;
}

/* ===== LAYOUT ===== */
.layout {
  display: grid;
  grid-template-columns: 380px 1fr;
  gap: 1.5rem;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 1.5rem 4rem;
  align-items: start;
}

@media (max-width: 900px) {
  .layout {
    grid-template-columns: 1fr;
  }
}

/* ===== PANELS ===== */
.panel {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.panel-browser {
  position: sticky;
  top: 64px;
  max-height: calc(100vh - 80px);
  display: flex;
  flex-direction: column;
}

@media (max-width: 900px) {
  .panel-browser {
    position: static;
    max-height: 480px;
  }
}

.panel-stack {
  min-height: 400px;
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.25rem 0.75rem;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.panel-title {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.compound-count,
.stack-count {
  font-size: 0.78rem;
  color: var(--text-3);
  background: var(--bg-4);
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-full);
}

/* ===== SEARCH ===== */
.search-wrap {
  position: relative;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.search-icon {
  position: absolute;
  left: 1.75rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-3);
  pointer-events: none;
}

.search-input {
  width: 100%;
  background: var(--bg-3);
  border: 1px solid var(--border-2);
  border-radius: var(--radius);
  padding: 0.5rem 0.75rem 0.5rem 2.2rem;
  font-family: inherit;
  font-size: 0.88rem;
  color: var(--text);
  outline: none;
  transition: var(--transition);
}

.search-input::placeholder { color: var(--text-3); }

.search-input:focus {
  border-color: var(--accent);
  background: var(--bg-4);
  box-shadow: 0 0 0 3px var(--accent-dim);
}

/* ===== CATEGORY FILTER ===== */
.cat-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  padding: 0.65rem 1rem;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.cat-btn {
  background: transparent;
  border: 1px solid var(--border-2);
  border-radius: var(--radius-full);
  padding: 0.2rem 0.6rem;
  font-family: inherit;
  font-size: 0.75rem;
  color: var(--text-3);
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}

.cat-btn:hover {
  color: var(--text);
  border-color: var(--border-2);
  background: var(--bg-4);
}

.cat-btn.active {
  background: var(--accent-dim);
  color: var(--accent);
  border-color: rgba(0,212,255,0.25);
}

/* ===== COMPOUND GRID ===== */
.compound-grid {
  overflow-y: auto;
  flex: 1;
  padding: 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.compound-grid::-webkit-scrollbar { width: 4px; }
.compound-grid::-webkit-scrollbar-track { background: transparent; }
.compound-grid::-webkit-scrollbar-thumb { background: var(--border-2); border-radius: 2px; }

.compound-card {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.6rem 0.75rem;
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  transition: var(--transition);
  position: relative;
}

.compound-card:hover {
  border-color: var(--border-2);
  background: var(--bg-4);
}

.compound-card.in-stack {
  border-color: rgba(0,212,255,0.25);
  background: var(--accent-dim2);
}

.compound-card.hidden { display: none; }

.compound-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}

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

.compound-name {
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.compound-dose {
  font-size: 0.75rem;
  color: var(--text-3);
  margin-top: 0.1rem;
}

/* category dot colors */
.cat-racetam    { background: #818cf8; }
.cat-choline    { background: #34d399; }
.cat-adaptogen  { background: #f472b6; }
.cat-amino      { background: #fb923c; }
.cat-herb       { background: #a3e635; }
.cat-vitamin    { background: #facc15; }
.cat-peptide    { background: #22d3ee; }
.cat-other      { background: #94a3b8; }

/* ===== STACK LIST ===== */
.stack-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  padding: 4rem 2rem;
  color: var(--text-3);
  font-size: 0.9rem;
  text-align: center;
}

.stack-list {
  padding: 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.stack-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.8rem 1rem;
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  animation: fadeIn 0.2s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-4px); }
  to   { opacity: 1; transform: translateY(0); }
}

.stack-item-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}

.stack-item-info { flex: 1; min-width: 0; }

.stack-item-name {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text);
}

.stack-item-details {
  font-size: 0.76rem;
  color: var(--text-3);
  margin-top: 0.1rem;
}

.stack-item-benefits {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem;
  margin-top: 0.3rem;
}

.benefit-tag {
  font-size: 0.7rem;
  padding: 0.1rem 0.4rem;
  border-radius: var(--radius-full);
  background: var(--bg-4);
  color: var(--text-3);
  border: 1px solid var(--border-2);
}

.btn-remove {
  background: transparent;
  border: none;
  color: var(--text-3);
  cursor: pointer;
  padding: 0.25rem;
  border-radius: var(--radius);
  transition: var(--transition);
  font-size: 1rem;
  line-height: 1;
  flex-shrink: 0;
}

.btn-remove:hover { color: var(--red); background: var(--red-dim); }

/* ===== INTERACTIONS ===== */
.section-label {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--text-3);
  padding: 0.75rem 1rem 0.4rem;
}

.interaction-section {
  border-top: 1px solid var(--border);
}

.interaction-list {
  padding: 0 0.75rem 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.interaction-item {
  display: flex;
  gap: 0.6rem;
  align-items: flex-start;
  padding: 0.65rem 0.75rem;
  border-radius: var(--radius);
  font-size: 0.83rem;
}

.interaction-item.synergy {
  background: var(--green-dim);
  border: 1px solid rgba(74,222,128,0.2);
}

.interaction-item.caution {
  background: var(--amber-dim);
  border: 1px solid rgba(251,191,36,0.2);
}

.interaction-icon {
  flex-shrink: 0;
  font-size: 0.9rem;
  margin-top: 0.05rem;
}

.interaction-text { flex: 1; }

.interaction-compounds {
  font-weight: 600;
  color: var(--text);
}

.interaction-note {
  color: var(--text-2);
  margin-top: 0.1rem;
}

/* ===== SUMMARY ===== */
.summary-section {
  border-top: 1px solid var(--border);
  padding-bottom: 1rem;
}

.summary-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.5rem;
  padding: 0 0.75rem;
}

@media (max-width: 600px) {
  .summary-grid { grid-template-columns: repeat(2, 1fr); }
}

.stat-card {
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.75rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
  text-align: center;
}

.stat-value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
}

.stat-label {
  font-size: 0.72rem;
  color: var(--text-3);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ===== BENEFIT BARS ===== */
.benefit-bars {
  padding: 0 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.benefit-row {
  display: grid;
  grid-template-columns: 100px 1fr 28px;
  align-items: center;
  gap: 0.6rem;
}

.benefit-label {
  font-size: 0.78rem;
  color: var(--text-2);
  text-align: right;
  text-transform: capitalize;
}

.benefit-track {
  height: 6px;
  background: var(--bg-4);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.benefit-fill {
  height: 100%;
  border-radius: var(--radius-full);
  transition: width 0.4s ease;
}

.benefit-pct {
  font-size: 0.72rem;
  color: var(--text-3);
}

/* benefit colors */
.benefit-focus         { background: #818cf8; }
.benefit-memory        { background: #34d399; }
.benefit-mood          { background: #f472b6; }
.benefit-sleep         { background: #60a5fa; }
.benefit-anxiety       { background: #a78bfa; }
.benefit-energy        { background: #fbbf24; }
.benefit-neuroprotection { background: #22d3ee; }

/* ===== DISCLAIMER ===== */
.disclaimer {
  margin: 1.25rem 0.75rem 0;
  padding: 0.75rem 1rem;
  background: var(--bg-4);
  border: 1px solid var(--border-2);
  border-radius: var(--radius);
  font-size: 0.78rem;
  color: var(--text-3);
  line-height: 1.5;
}

/* ===== MODAL ===== */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.7);
  backdrop-filter: blur(4px);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}

.modal {
  background: var(--bg-2);
  border: 1px solid var(--border-2);
  border-radius: var(--radius-lg);
  padding: 2rem;
  max-width: 480px;
  width: 100%;
  position: relative;
  box-shadow: var(--shadow);
}

.modal-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: transparent;
  border: none;
  color: var(--text-3);
  font-size: 1rem;
  cursor: pointer;
  padding: 0.25rem 0.4rem;
  border-radius: var(--radius);
  transition: var(--transition);
  line-height: 1;
}

.modal-close:hover { color: var(--text); background: var(--bg-4); }

.modal-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 0.35rem;
}

.modal-sub {
  font-size: 0.85rem;
  color: var(--text-2);
  margin-bottom: 1.25rem;
}

.copy-row {
  display: flex;
  gap: 0.5rem;
  align-items: stretch;
}

.copy-input {
  flex: 1;
  background: var(--bg-3);
  border: 1px solid var(--border-2);
  border-radius: var(--radius);
  padding: 0.5rem 0.75rem;
  font-family: 'Courier New', monospace;
  font-size: 0.8rem;
  color: var(--text);
  outline: none;
  resize: none;
}

.embed-textarea {
  line-height: 1.5;
}

.embed-note {
  font-size: 0.78rem;
  color: var(--text-3);
  margin-top: 0.75rem;
  text-align: center;
}

/* ===== TOOLTIP ===== */
.tooltip {
  position: fixed;
  z-index: 300;
  background: var(--bg-2);
  border: 1px solid var(--border-2);
  border-radius: var(--radius);
  padding: 0.75rem 1rem;
  max-width: 280px;
  font-size: 0.8rem;
  color: var(--text-2);
  line-height: 1.5;
  box-shadow: var(--shadow);
  pointer-events: none;
}

.tooltip-name {
  font-weight: 600;
  color: var(--text);
  margin-bottom: 0.3rem;
  font-size: 0.88rem;
}

.tooltip-mechanism {
  color: var(--text-2);
  margin-bottom: 0.4rem;
}

.tooltip-meta {
  display: flex;
  gap: 1rem;
  margin-top: 0.4rem;
  padding-top: 0.4rem;
  border-top: 1px solid var(--border);
  font-size: 0.75rem;
  color: var(--text-3);
}

/* ===== TOAST ===== */
.toast {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  background: var(--bg-2);
  border: 1px solid var(--border-2);
  border-radius: var(--radius);
  padding: 0.75rem 1.25rem;
  font-size: 0.85rem;
  color: var(--text);
  box-shadow: var(--shadow);
  z-index: 400;
  animation: slideUp 0.2s ease, fadeOut 0.3s ease 1.7s forwards;
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

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

/* ===== SCROLLBAR (global) ===== */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-2); border-radius: 3px; }

/* ===== EMBED MODE ===== */
body.embed-mode .nav { display: none; }
body.embed-mode .hero { display: none; }
body.embed-mode .layout { padding-top: 1rem; padding-bottom: 1rem; }