/* ============================================================
   HOME CSS - Visualizer & Builder Specific Styles
   ============================================================ */

/* HERO */
.hero {
  position: relative;
  height: 300px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  border-bottom: 1px solid var(--border);
  background: linear-gradient(180deg, var(--bg) 0%, var(--bg2) 100%);
}
.hero-grid {
  position: absolute; inset: 0;
  background-image: linear-gradient(rgba(0,229,204,0.03) 1px, transparent 1px), linear-gradient(90deg, rgba(0,229,204,0.03) 1px, transparent 1px);
  background-size: 50px 50px;
}
.hero-content { position: relative; z-index: 2; text-align: center; }
.hero-label { font-family: var(--mono); font-size: 10px; color: var(--cyan); letter-spacing: 4px; text-transform: uppercase; margin-bottom: 12px; opacity: 0.7; }
.hero-title { font-size: 42px; font-weight: 700; color: var(--text); line-height: 1.1; margin-bottom: 10px; }
.hero-title span { color: var(--cyan); text-shadow: 0 0 20px var(--cyan-glow); }
.hero-sub { font-size: 14px; color: var(--text2); font-weight: 300; max-width: 600px; margin: 0 auto; }

/* MAIN VISUAL PANEL (3 COLUMNS) */
.main-panel {
  display: grid;
  grid-template-columns: 260px 1fr 300px;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  min-height: 500px;
}

.side-panel {
  background: var(--bg2);
  border-right: 1px solid var(--border);
  padding: 30px 20px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.active-mol-display {
  background: var(--surface);
  border: 1px solid var(--border2);
  border-radius: 16px;
  padding: 30px 20px;
  text-align: center;
  box-shadow: 0 10px 30px rgba(0,0,0,0.2);
}
#activeMolFormula { font-family: var(--mono); font-size: 40px; font-weight: 700; color: var(--cyan); text-shadow: 0 0 15px var(--cyan-glow); }
#activeMolName { font-size: 16px; color: var(--text2); margin-top: 5px; }

.viewer-section {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(circle at center, #101a2b 0%, var(--bg) 100%);
}
.viewer-bg-grid { position: absolute; inset: 0; background-image: linear-gradient(rgba(0,229,204,0.02) 1px, transparent 1px), linear-gradient(90deg, rgba(0,229,204,0.02) 1px, transparent 1px); background-size: 40px 40px; pointer-events: none; }
#viewerCanvas { width: 100%; height: 500px; cursor: grab; display: block; }
.viewer-hint { position: absolute; bottom: 20px; font-family: var(--mono); font-size: 10px; color: var(--text3); background: rgba(8,12,20,0.7); padding: 6px 16px; border-radius: 30px; backdrop-filter: blur(5px); border: 1px solid var(--border); }

.info-section {
  background: var(--bg2);
  border-left: 1px solid var(--border);
  padding: 30px 20px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.info-geo { 
  background: rgba(13, 20, 32, 0.45); border: 1px solid var(--border); border-radius: 12px; padding: 16px; 
  backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.05);
}
.info-geo-name { font-size: 18px; font-weight: 700; color: var(--cyan); margin-bottom: 4px; }
.info-geo-axe { font-family: var(--mono); font-size: 12px; color: var(--text2); opacity: 0.8; }

.info-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.stat-box { 
  background: rgba(13, 20, 32, 0.45); border: 1px solid var(--border); border-radius: 10px; padding: 12px; text-align: center; transition: all 0.3s; 
  backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.05);
}
.stat-box:hover { border-color: var(--cyan); background: rgba(13, 20, 32, 0.6); box-shadow: 0 0 15px var(--cyan-glow); }
.stat-val { font-family: var(--mono); font-size: 24px; font-weight: 700; color: var(--cyan); line-height: 1; margin-bottom: 4px; }
.stat-lbl { font-size: 10px; color: var(--text2); text-transform: uppercase; letter-spacing: 1px; }

.info-desc { 
  font-size: 13px; color: var(--text2); line-height: 1.6; background: rgba(13, 20, 32, 0.45); border: 1px solid var(--border); border-left: 4px solid var(--cyan); padding: 16px; border-radius: 12px; 
  backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.05);
}

/* SELECTOR SECTION (BOTTOM) */
.selector-section { padding: 40px 40px 60px; background: var(--bg); }
.tab-toggle { display: flex; gap: 10px; margin-bottom: 30px; justify-content: center; }
.tab-btn {
  background: rgba(13, 20, 32, 0.45); border: 1px solid var(--border); border-radius: 12px; padding: 14px 24px;
  cursor: pointer; font-family: var(--mono); font-size: 13px; font-weight: 700; color: var(--text3);
  text-transform: uppercase; transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  min-width: 220px;
  backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.05);
}
.tab-btn:hover { border-color: var(--cyan2); color: var(--text2); background: rgba(13, 20, 32, 0.6); }
.tab-btn.active { background: var(--cyan-dim); border-color: var(--cyan); color: var(--cyan); box-shadow: 0 0 20px var(--cyan-glow); transform: translateY(-2px); }

/* KATALOG */
.mol-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 15px; }
.mol-card {
  background: rgba(13, 20, 32, 0.45); border: 1px solid var(--border); border-radius: 14px; padding: 20px 15px;
  cursor: pointer; transition: all 0.3s; text-align: center;
  backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.05);
}
.mol-card:hover { border-color: var(--cyan); background: rgba(13, 20, 32, 0.6); transform: translateY(-3px); box-shadow: 0 10px 20px rgba(0, 0, 0, 0.4), 0 0 15px var(--cyan-glow); }
.mol-card.active { border-color: var(--cyan); background: var(--cyan-dim); box-shadow: 0 10px 20px rgba(0,0,0,0.3); }

/* PERIODIC TABLE (PREMIUM LOOK) */
.periodic-table-wrapper { 
  background: rgba(13, 20, 32, 0.45); border: 1px solid var(--border); border-radius: 20px; padding: 25px; overflow-x: auto; margin-bottom: 25px; 
  backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.05);
}
.periodic-table-title { font-family: var(--mono); font-size: 11px; color: var(--text3); letter-spacing: 3px; text-transform: uppercase; margin-bottom: 20px; text-align: center; }
.periodic-table { display: grid; grid-template-columns: repeat(18, 1fr); gap: 8px; min-width: 900px; padding: 10px; }

.pt-element {
  background: rgba(13, 20, 32, 0.3); border: 1px solid var(--border); border-radius: 8px; padding: 12px 5px;
  cursor: pointer; text-align: center; transition: all 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275); min-height: 70px;
  display: flex; flex-direction: column; align-items: center; justify-content: center; position: relative;
  backdrop-filter: blur(5px); -webkit-backdrop-filter: blur(5px);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.03);
}
.pt-element:hover { border-color: var(--cyan); background: var(--cyan-dim); box-shadow: 0 0 15px var(--cyan-glow); transform: scale(1.15) translateY(-5px); z-index: 10; }
.pt-element .pt-number { font-size: 8px; color: var(--text3); position: absolute; top: 4px; left: 5px; font-weight: 700; }
.pt-element .pt-symbol { font-family: var(--mono); font-size: 16px; font-weight: 700; color: var(--text); margin-bottom: 2px; }
.pt-element .pt-name { font-size: 7px; color: var(--text3); font-weight: 400; text-transform: uppercase; letter-spacing: 0.5px; }

/* Categories */
.pt-element.nonmetal { border-top: 3px solid var(--cyan); }
.pt-element.noble-gas { border-top: 3px solid #9b59b6; }
.pt-element.alkali-metal { border-top: 3px solid #e74c3c; }
.pt-element.alkaline-earth { border-top: 3px solid #e67e22; }
.pt-element.metalloid { border-top: 3px solid #1abc9c; }
.pt-element.halogen { border-top: 3px solid #f1c40f; }
.pt-element.post-transition { border-top: 3px solid #2ecc71; }

/* FORMULA BUILDER UI */
.formula-section { 
  background: var(--surface); 
  border: 1px solid var(--border); 
  border-radius: 16px; 
  padding: 15px 20px; 
  display: flex; 
  flex-direction: column; 
  align-items: center;
  margin-bottom: 25px;
}
.formula-label { 
  font-family: var(--mono); 
  font-size: 11px; 
  color: var(--text3); 
  text-transform: uppercase; 
  margin-bottom: 8px; 
  letter-spacing: 2px; 
}
#formulaDisplay {
  background: rgba(8, 12, 20, 0.6); 
  border: 1px solid var(--border2); 
  border-radius: 12px; 
  padding: 10px 25px;
  font-family: var(--mono); 
  font-size: 26px; 
  font-weight: 700; 
  color: var(--cyan); 
  text-align: center;
  min-height: 55px; 
  display: flex; 
  align-items: center; 
  justify-content: center; 
  margin-bottom: 15px;
  text-shadow: 0 0 15px var(--cyan-glow); 
  width: 100%; 
  max-width: 600px;
}
.formula-actions {
  display: flex;
  gap: 15px;
  width: 100%;
  max-width: 600px;
  justify-content: center;
}
.formula-btn {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: bold;
  padding: 10px 20px;
  border-radius: 30px;
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  border: 1px solid transparent;
  outline: none;
  letter-spacing: 1px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.3);
}
.clear-btn {
  background: rgba(231, 76, 60, 0.1);
  border-color: rgba(231, 76, 60, 0.3);
  color: #e74c3c;
}
.clear-btn:hover {
  background: #e74c3c;
  color: #fff;
  box-shadow: 0 0 15px rgba(231, 76, 60, 0.4);
  transform: translateY(-2px);
}
.clear-btn:active {
  transform: translateY(0) scale(0.97);
}
.render-btn {
  background: rgba(0, 210, 255, 0.1);
  border-color: rgba(0, 210, 255, 0.3);
  color: #00d2ff;
}
.render-btn:hover {
  background: #00d2ff;
  color: #080c14;
  box-shadow: 0 0 15px rgba(0, 210, 255, 0.4);
  transform: translateY(-2px);
}
.render-btn:active {
  transform: translateY(0) scale(0.97);
}

@media (max-width: 1200px) {
  .main-panel { grid-template-columns: 240px 1fr; }
  .info-section { grid-column: 1 / -1; border-left: none; border-top: 1px solid var(--border); display: grid; grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .hero { height: 100px; }
  .hero-label { font-size: 8px; margin-bottom: 6px; letter-spacing: 2px; }
  .hero-title { font-size: 18px; margin-bottom: 4px; }
  .hero-sub { display: none !important; }
  
  .main-panel { display: flex; flex-direction: column; min-height: auto; }
  
  /* 1. Formula & Notation Cards Side-by-Side (50/50) at the very top */
  .side-panel {
    order: 1;
    border-right: none;
    border-bottom: 1px solid var(--border);
    padding: 12px 10px;
    display: flex;
    flex-direction: row !important;
    gap: 10px;
    width: 100%;
    box-sizing: border-box;
    align-items: stretch;
  }
  .side-panel .section-label {
    display: none !important;
  }
  .side-panel h3 {
    display: none !important;
  }
  .active-mol-display, .info-geo {
    flex: 1;
    min-width: 0;
    margin: 0 !important;
    padding: 6px 8px !important;
    border-radius: 10px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 60px;
    box-sizing: border-box;
    background: var(--surface);
    border: 1px solid var(--border2);
  }
  #activeMolFormula { font-size: 18px; font-weight: bold; margin-bottom: 2px; color: var(--cyan); text-shadow: 0 0 10px var(--cyan-glow); }
  #activeMolName { font-size: 10px; color: var(--text2); }
  .info-geo-name { font-size: 11px; font-weight: bold; margin-bottom: 2px; text-align: center; color: var(--cyan); }
  .info-geo-axe { font-size: 10px; color: var(--text2); }
  
  /* 2. 3D Viewer Canvas in the middle */
  .viewer-section { order: 2; min-height: 240px; }
  #viewerCanvas { height: 240px; }
  .viewer-hint { font-size: 8px; padding: 4px 12px; bottom: 10px; }
  
  /* 3. Detailed Explanation Section at the bottom of panel, matching SS exactly */
  .info-section {
    order: 3;
    border-left: none;
    border-top: 1px solid var(--border);
    padding: 20px 15px;
    gap: 0;
    display: flex;
    flex-direction: column;
  }
  .info-section .section-label {
    font-size: 10px;
    margin-bottom: 12px;
    justify-content: center !important;
    text-align: center !important;
    width: 100% !important;
  }
  .info-section .section-label::after { display: none !important; }
  
  .info-stats {
    display: flex;
    flex-direction: row !important;
    gap: 12px;
    width: 100%;
    margin-bottom: 12px;
  }
  .stat-box {
    flex: 1;
    padding: 10px 8px;
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.05);
    text-align: center;
    box-sizing: border-box;
  }
  .stat-val {
    font-size: 22px;
    font-weight: bold;
    font-family: 'Space Mono', monospace;
    color: var(--cyan);
    margin-bottom: 2px;
    text-shadow: 0 0 10px var(--cyan-glow);
  }
  .stat-lbl {
    font-size: 9px;
    font-family: 'Space Mono', monospace;
    color: #a0aab8;
    text-transform: uppercase;
    letter-spacing: 2px;
  }
  
  .info-angles {
    font-size: 18px;
    font-weight: 700;
    color: #fff;
    text-align: center !important;
    margin-top: 10px;
    margin-bottom: 10px;
    font-family: 'Sora', sans-serif;
  }
  
  .info-desc {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-left: 4px solid var(--cyan);
    border-right: 4px solid var(--cyan);
    border-radius: 12px;
    padding: 12px 14px;
    color: #a0aab8;
    font-size: 12px;
    line-height: 1.5;
    text-align: center;
    margin: 0;
    font-family: 'Sora', sans-serif;
  }
  
  /* 4. Selector Tabs side-by-side in one row */
  .selector-section { padding: 15px 8px 25px; }
  .tab-toggle {
    flex-direction: row !important;
    width: 100%;
    align-items: center;
    gap: 10px;
  }
  .tab-btn {
    flex: 1;
    min-width: 0;
    max-width: none;
    padding: 10px;
    font-size: 10px;
    text-align: center;
  }
  .mol-grid { grid-template-columns: repeat(auto-fill, minmax(110px, 1fr)); gap: 8px; }
  .mol-card { padding: 10px 8px; border-radius: 10px; }
  .mol-name { font-size: 11px; }
  .mol-formula { font-size: 10px; }
  
  .periodic-table-wrapper { padding: 8px; border-radius: 10px; margin-top: 15px; }
  .formula-section { padding: 12px 10px; border-radius: 12px; margin-bottom: 0; }
  #formulaDisplay { font-size: 18px; min-height: 40px; padding: 6px 12px; margin-bottom: 10px; }
  .formula-actions { gap: 10px; width: 100%; }
  .formula-btn { flex: 1; padding: 8px 10px; font-size: 11px; border-radius: 15px; }
}