/* ==========================================================================
   CHEMMOD 3D - FUTURISTIC CHEMISTRY LAB STYLESHEET
   ========================================================================== */

:root {
  --bg-dark: #0f172a;
  --card-bg: rgba(30, 41, 59, 0.75);
  --accent-cyan: #06b6d4;
  --accent-green: #10b981;
  --accent-blue: #3b82f6;
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --border-color: rgba(255, 255, 255, 0.1);
  --carbon-color: #334155;
  --hydrogen-color: #e2e8f0;
  --oxygen-color: #ef4444;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
  background-color: var(--bg-dark);
  background-image: 
    radial-gradient(circle at 15% 15%, rgba(6, 182, 212, 0.15) 0%, transparent 40%),
    radial-gradient(circle at 85% 85%, rgba(16, 185, 129, 0.12) 0%, transparent 40%);
  color: var(--text-main);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* NAVBAR */
.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  background: rgba(15, 23, 42, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-brand {
  font-size: 1.4rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.logo-icon {
  color: var(--accent-cyan);
  font-size: 1.6rem;
}

.text-accent { color: var(--accent-cyan); }
.gradient-text {
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-green));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

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

.nav-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  padding: 0.6rem 1rem;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.3s;
  font-size: 0.95rem;
}

.nav-btn:hover, .nav-btn.active {
  color: #fff;
  background: rgba(6, 182, 212, 0.15);
  border-bottom: 2px solid var(--accent-cyan);
}

.user-badge {
  background: rgba(255, 255, 255, 0.08);
  padding: 0.4rem 0.8rem;
  border-radius: 20px;
  font-size: 0.85rem;
  margin-right: 0.5rem;
}

/* LAYOUT & CARDS */
.main-container {
  flex: 1;
  padding: 2rem;
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
  animation: fadeIn 0.4s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.card-glass {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 1.5rem;
  backdrop-filter: blur(12px);
  margin-bottom: 1.5rem;
}

/* HERO SECTION */
.hero-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  align-items: center;
  background: var(--card-bg);
  padding: 2.5rem;
  border-radius: 20px;
  border: 1px solid var(--border-color);
  margin-bottom: 2rem;
}

.badge-fase {
  background: rgba(16, 185, 129, 0.2);
  color: var(--accent-green);
  padding: 0.3rem 0.8rem;
  border-radius: 6px;
  font-size: 0.8rem;
  font-weight: 600;
}

.hero-text h1 {
  font-size: 2.2rem;
  margin: 0.8rem 0;
  line-height: 1.2;
}

.hero-sub {
  color: var(--text-muted);
  margin-bottom: 1.5rem;
  line-height: 1.5;
}

.hero-actions { display: flex; gap: 1rem; }

.btn-hero, .btn-pri {
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
  color: #fff;
  border: none;
  padding: 0.8rem 1.5rem;
  border-radius: 10px;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
}

.btn-hero:hover, .btn-pri:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(6, 182, 212, 0.4);
}

.btn-hero-outline, .btn-sec {
  background: transparent;
  border: 1px solid var(--accent-cyan);
  color: var(--accent-cyan);
  padding: 0.8rem 1.5rem;
  border-radius: 10px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-hero-outline:hover, .btn-sec:hover {
  background: rgba(6, 182, 212, 0.1);
}

/* VIRTUAL MOLYMOD 3D VISUAL */
.hero-visual {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.molymod-container-3d {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.3rem;
  padding: 2rem;
  background: rgba(0,0,0,0.3);
  border-radius: 16px;
  width: 100%;
}

.atom {
  width: 45px;
  height: 45px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  color: #fff;
  box-shadow: inset -4px -4px 8px rgba(0,0,0,0.6), 0 4px 10px rgba(0,0,0,0.4);
}

.atom.carbon { background: #475569; border: 1px solid #64748b; }
.atom.oxygen { background: #ef4444; border: 1px solid #f87171; }
.atom.hydrogen { background: #f8fafc; color: #0f172a; border: 1px solid #cbd5e1; }

.bond {
  width: 25px;
  height: 6px;
  background: #94a3b8;
  border-radius: 3px;
}

.caption-3d { font-size: 0.85rem; color: var(--text-muted); margin-top: 0.8rem; }

/* LEGEND & TP CARDS */
.tp-card, .legend-card {
  background: var(--card-bg);
  padding: 1.5rem;
  border-radius: 12px;
  border: 1px solid var(--border-color);
  margin-bottom: 1.5rem;
}

.color-grid {
  display: flex;
  gap: 1.5rem;
  margin-top: 0.8rem;
}

.dot {
  display: inline-block;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  margin-right: 4px;
}

/* MATERI SIDEBAR LAYOUT */
.materi-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 1.5rem;
}

.materi-sidebar {
  background: var(--card-bg);
  padding: 1.2rem;
  border-radius: 16px;
  border: 1px solid var(--border-color);
  height: fit-content;
}

.materi-menu { list-style: none; margin: 1rem 0; }
.materi-item {
  padding: 0.8rem;
  border-radius: 8px;
  cursor: pointer;
  margin-bottom: 0.4rem;
  color: var(--text-muted);
  transition: all 0.2s;
}

.materi-item:hover, .materi-item.active {
  background: rgba(6, 182, 212, 0.2);
  color: #fff;
  font-weight: 600;
}

.progress-box { margin-top: 1.5rem; font-size: 0.85rem; }
.progress-bar-bg {
  background: rgba(255,255,255,0.1);
  height: 8px;
  border-radius: 4px;
  margin: 0.4rem 0;
  overflow: hidden;
}
.progress-bar-fill {
  background: var(--accent-green);
  height: 100%;
  transition: width 0.3s;
}

.materi-nav-controls {
  display: flex;
  justify-content: space-between;
  margin-top: 2rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-color);
}

/* SIMULASI INTERAKTIF STYLES */
.simulasi-tabs {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.sim-tab-btn {
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  padding: 0.6rem 1.2rem;
  border-radius: 8px;
  cursor: pointer;
}

.sim-tab-btn.active {
  background: var(--accent-cyan);
  color: #fff;
}

.drag-zone {
  display: flex;
  justify-content: space-between;
  margin: 1.5rem 0;
  gap: 1rem;
}

.drag-items { display: flex; flex-direction: column; gap: 0.8rem; width: 40%; }
.draggable {
  background: rgba(6, 182, 212, 0.2);
  border: 1px dashed var(--accent-cyan);
  padding: 0.8rem;
  border-radius: 8px;
  cursor: grab;
  text-align: center;
}

.drop-target {
  width: 55%;
  background: rgba(0,0,0,0.3);
  padding: 1rem;
  border-radius: 12px;
  text-align: center;
}

.drop-box {
  border: 2px dashed var(--accent-green);
  padding: 2rem;
  border-radius: 8px;
  margin-top: 1rem;
  color: var(--accent-green);
}

.puzzle-pool, .puzzle-droparea {
  display: flex;
  gap: 0.5rem;
  padding: 1rem;
  background: rgba(0,0,0,0.2);
  border-radius: 8px;
  margin: 1rem 0;
  min-height: 50px;
  align-items: center;
}

.puzzle-piece {
  background: var(--accent-blue);
  padding: 0.5rem 0.8rem;
  border-radius: 6px;
  cursor: pointer;
}

.match-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; margin: 1rem 0; }
.match-card {
  background: rgba(255,255,255,0.05);
  padding: 1rem;
  border-radius: 8px;
  cursor: pointer;
  border: 1px solid transparent;
}
.match-card.selected { border-color: var(--accent-cyan); background: rgba(6,182,212,0.2); }

.feedback-msg { margin-top: 1rem; font-weight: 600; min-height: 24px; }
.feedback-msg.success { color: var(--accent-green); }
.feedback-msg.error { color: #f87171; }

/* FORMS & EVALUATION */
.form-group { margin-bottom: 1.2rem; }
.form-group label { display: block; margin-bottom: 0.4rem; font-size: 0.9rem; }
.form-input {
  width: 100%;
  padding: 0.7rem;
  border-radius: 8px;
  background: rgba(15, 23, 42, 0.8);
  border: 1px solid var(--border-color);
  color: #fff;
}

.options-group label {
  display: block;
  background: rgba(255,255,255,0.03);
  padding: 0.7rem 1rem;
  border-radius: 8px;
  margin-bottom: 0.5rem;
  cursor: pointer;
  border: 1px solid transparent;
}

.options-group label:hover { border-color: var(--accent-cyan); }

.score-display-card {
  text-align: center;
  background: var(--card-bg);
  padding: 3rem;
  border-radius: 20px;
  border: 1px solid var(--accent-green);
}

.score-icon { font-size: 4rem; color: var(--accent-green); margin-bottom: 1rem; }
.score-badge-large h1 { font-size: 3.5rem; color: var(--accent-cyan); margin: 0.5rem 0; }
.security-note { font-size: 0.85rem; color: var(--text-muted); margin: 1.5rem 0; }

/* MODALS & TABLES */
.modal-overlay {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.8);
  backdrop-filter: blur(5px);
  z-index: 200;
  justify-content: center;
  align-items: center;
}

.modal-card {
  background: var(--bg-dark);
  border: 1px solid var(--border-color);
  padding: 2rem;
  border-radius: 16px;
  width: 90%;
  max-width: 450px;
}

.modal-large { max-width: 750px; }
.modal-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 1.5rem; }
.close-btn { background: none; border: none; color: #fff; font-size: 1.5rem; cursor: pointer; }

.role-switcher { display: flex; gap: 0.5rem; margin-bottom: 1.5rem; }
.role-btn { flex: 1; padding: 0.6rem; border-radius: 8px; border: none; cursor: pointer; background: rgba(255,255,255,0.05); color: #fff; }
.role-btn.active { background: var(--accent-cyan); }

.password-wrapper { position: relative; }
.toggle-pass-btn { position: absolute; right: 10px; top: 50%; transform: translateY(-50%); background: none; border: none; color: var(--text-muted); cursor: pointer; }

.data-table { width: 100%; border-collapse: collapse; margin-top: 1rem; }
.data-table th, .data-table td { padding: 0.8rem; text-align: left; border-bottom: 1px solid var(--border-color); font-size: 0.9rem; }
.data-table th { background: rgba(255,255,255,0.05); color: var(--accent-cyan); }

.filter-bar { display: flex; gap: 1rem; }
.filter-item { flex: 1; display: flex; align-items: center; gap: 0.5rem; }

/* RESPONSIVE DESIGN */
@media (max-width: 768px) {
  .hero-card { grid-template-columns: 1fr; }
  .materi-layout { grid-template-columns: 1fr; }
  .drag-zone { flex-direction: column; }
  .drag-items, .drop-target { width: 100%; }
  .nav-links { display: none; }
}