/* Asadin Edu Physics · Components & Interactive Elements */

/* ========================================================
   HERO SECTION
   ======================================================== */
.hero-section {
  position: relative;
  padding: 80px 0 60px;
  overflow: hidden;
  text-align: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: rgba(0, 242, 254, 0.08);
  border: 1px solid rgba(0, 242, 254, 0.25);
  border-radius: var(--radius-full);
  color: var(--cyan-bright);
  font-size: 0.84rem;
  font-weight: 600;
  margin-bottom: 24px;
}

.hero-title {
  font-size: clamp(2.5rem, 5.5vw, 4.2rem);
  font-weight: 900;
  letter-spacing: -0.03em;
  max-width: 900px;
  margin: 0 auto 20px;
  background: linear-gradient(135deg, #ffffff 30%, #e0f2fe 70%, var(--azure-glow) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-desc {
  font-size: 1.15rem;
  max-width: 680px;
  margin: 0 auto 36px;
  color: var(--text-secondary);
  line-height: 1.7;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 50px;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: linear-gradient(135deg, var(--cyan-bright) 0%, var(--azure-glow) 100%);
  color: #05070e;
  padding: 13px 28px;
  border-radius: var(--radius-full);
  font-weight: 700;
  font-size: 0.96rem;
  border: none;
  cursor: pointer;
  box-shadow: 0 4px 20px rgba(0, 242, 254, 0.35);
  transition: all var(--trans-smooth);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(0, 242, 254, 0.5);
  color: #05070e;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  padding: 13px 26px;
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: 0.96rem;
  cursor: pointer;
  transition: all var(--trans-fast);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-2px);
}

/* Quick Stats Bar */
.hero-stats-row {
  display: flex;
  justify-content: center;
  gap: 36px;
  flex-wrap: wrap;
  padding: 24px 32px;
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  max-width: 980px;
  margin: 0 auto;
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.stat-num {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--cyan-bright);
}

.stat-label {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  font-weight: 600;
}

/* ========================================================
   DOMAIN CARDS GRID
   ======================================================== */
.domains-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 290px), 1fr));
  gap: 22px;
  margin-top: 28px;
}

.domain-card {
  position: relative;
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 24px;
  transition: all var(--trans-smooth);
  display: flex;
  flex-direction: column;
  cursor: pointer;
  overflow: hidden;
  text-decoration: none;
}

.domain-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--card-accent, var(--cyan-bright));
  opacity: 0.6;
  transition: opacity var(--trans-fast);
}

.domain-card:hover {
  transform: translateY(-4px);
  border-color: rgba(255, 255, 255, 0.2);
  background: var(--bg-card-hover);
  box-shadow: 0 12px 30px -10px rgba(0, 0, 0, 0.6), 0 0 20px rgba(0, 242, 254, 0.15);
}

.domain-card:hover::before {
  opacity: 1;
  height: 4px;
}

.domain-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.domain-card-icon {
  font-size: 2rem;
  line-height: 1;
}

.domain-scale-tag {
  font-size: 0.72rem;
  padding: 3px 8px;
  background: rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.domain-card-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.domain-card-indo {
  font-size: 0.85rem;
  color: var(--cyan-bright);
  font-weight: 500;
  margin-bottom: 12px;
}

.domain-card-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 16px;
  flex-grow: 1;
}

.domain-subtags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.subtag {
  font-size: 0.74rem;
  padding: 2px 8px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.07);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
}

/* ========================================================
   ENTITY CARDS
   ======================================================== */
.entities-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 320px), 1fr));
  gap: 20px;
}

.entity-card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 22px;
  transition: all var(--trans-smooth);
  display: flex;
  flex-direction: column;
  text-decoration: none;
  position: relative;
}

.entity-card:hover {
  transform: translateY(-3px);
  border-color: rgba(0, 242, 254, 0.35);
  background: var(--bg-card-hover);
  box-shadow: 0 10px 25px -8px rgba(0, 0, 0, 0.5);
}

.entity-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.entity-type-badge {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 3px 9px;
  border-radius: var(--radius-full);
}

.badge-concept { background: rgba(0, 242, 254, 0.15); color: var(--cyan-bright); }
.badge-law { background: rgba(246, 211, 101, 0.15); color: var(--amber-solar); }
.badge-principle { background: rgba(56, 239, 125, 0.15); color: var(--emerald-neon); }
.badge-quantity { background: rgba(79, 172, 254, 0.15); color: var(--azure-glow); }
.badge-unit { background: rgba(130, 204, 221, 0.15); color: #82ccdd; }
.badge-constant { background: rgba(250, 177, 160, 0.15); color: #fab1a0; }
.badge-equation { background: rgba(162, 155, 254, 0.15); color: #a29bfe; }
.badge-particle { background: rgba(179, 136, 255, 0.15); color: var(--violet-quantum); }
.badge-theory { background: rgba(255, 65, 108, 0.15); color: var(--rose-relativity); }
.badge-phenomenon { background: rgba(255, 154, 68, 0.15); color: var(--orange-thermo); }
.badge-field { background: rgba(0, 198, 255, 0.15); color: #00c6ff; }
.badge-experiment { background: rgba(240, 147, 251, 0.15); color: #f093fb; }
.badge-instrument { background: rgba(255, 234, 167, 0.15); color: #ffeaa7; }
.badge-system { background: rgba(85, 239, 196, 0.15); color: #55efc4; }

/* Scientific Demarcation Status Badges */
.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  padding: 3px 8px;
  border-radius: var(--radius-full);
  text-transform: uppercase;
}
.status-established-science {
  background: rgba(56, 239, 125, 0.12);
  color: #38ef7d;
  border: 1px solid rgba(56, 239, 125, 0.3);
}
.status-active-research {
  background: rgba(246, 211, 101, 0.12);
  color: #f6d365;
  border: 1px solid rgba(246, 211, 101, 0.3);
}
.status-speculative---hypothetical,
.status-speculative-hypothetical {
  background: rgba(255, 65, 108, 0.12);
  color: #ff416c;
  border: 1px solid rgba(255, 65, 108, 0.35);
}

.entity-symbol {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.07);
  padding: 2px 8px;
  border-radius: 4px;
}

.entity-card-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 2px;
}

.entity-card-indo {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.entity-card-summary {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.5;
  flex-grow: 1;
  margin-bottom: 16px;
}

/* ========================================================
   MULTI-LAYER DEPTH SWITCHER (SIMPLE -> STANDARD -> ADVANCED -> DEEP DIVE)
   ======================================================== */
.layer-switcher-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  background: rgba(0, 0, 0, 0.35);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 12px 18px;
  margin: 24px 0;
}

.layer-switcher-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.layer-tabs {
  display: flex;
  background: rgba(255, 255, 255, 0.04);
  padding: 3px;
  border-radius: var(--radius-full);
  gap: 4px;
}

.layer-tab-btn {
  padding: 6px 16px;
  border-radius: var(--radius-full);
  font-size: 0.82rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  background: transparent;
  color: var(--text-muted);
  transition: all var(--trans-fast);
}

.layer-tab-btn:hover {
  color: var(--text-primary);
}

.layer-tab-btn.active {
  background: linear-gradient(135deg, var(--cyan-bright) 0%, var(--azure-glow) 100%);
  color: #05070e;
  box-shadow: 0 0 12px rgba(0, 242, 254, 0.4);
}

.layer-content-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 28px;
  margin-bottom: 24px;
  position: relative;
  overflow: hidden;
}

.layer-badge-indicator {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  margin-bottom: 16px;
}

/* ========================================================
   EQUATION INSPECTOR & SOLVER
   ======================================================== */
.equation-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 28px;
  margin-bottom: 24px;
}

.equation-display-box {
  background: rgba(0, 0, 0, 0.45);
  border: 1px solid rgba(0, 242, 254, 0.25);
  border-radius: var(--radius-md);
  padding: 22px;
  text-align: center;
  margin: 18px 0;
  box-shadow: inset 0 0 20px rgba(0, 242, 254, 0.05);
}

.equation-math {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  color: #fff;
}

.variables-inspector-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 260px), 1fr));
  gap: 14px;
  margin: 20px 0;
}

.variable-pill {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  transition: all var(--trans-fast);
}

.variable-pill:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(0, 242, 254, 0.3);
}

.variable-sym {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--cyan-bright);
  margin-bottom: 2px;
}

.variable-name {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-primary);
}

.variable-unit {
  font-size: 0.78rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.variable-role {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-top: 6px;
  line-height: 1.4;
}

/* Live Equation Solver Sandbox */
.equation-solver-box {
  background: rgba(0, 0, 0, 0.35);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 20px;
  margin-top: 20px;
}

.solver-inputs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 200px), 1fr));
  gap: 16px;
  margin-bottom: 18px;
}

.solver-input-group label {
  display: block;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.solver-input {
  width: 100%;
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  color: #fff;
  font-family: var(--font-mono);
  font-size: 0.95rem;
}

.solver-input:focus {
  outline: none;
  border-color: var(--cyan-bright);
  box-shadow: 0 0 10px rgba(0, 242, 254, 0.3);
}

.solver-result-box {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(0, 242, 254, 0.08);
  border: 1px solid rgba(0, 242, 254, 0.3);
  padding: 14px 20px;
  border-radius: var(--radius-sm);
}

.solver-result-val {
  font-family: var(--font-mono);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--cyan-bright);
}

/* ========================================================
   GLOBAL SEARCH MODAL & PALETTE
   ======================================================== */
.search-modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(4, 7, 14, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  z-index: 2000;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 80px 20px 20px;
  opacity: 0;
  visibility: hidden;
  transition: all var(--trans-fast);
}

.search-modal-backdrop.open {
  opacity: 1;
  visibility: visible;
}

.search-modal-box {
  width: 100%;
  max-width: 680px;
  background: #0d1322;
  border: 1px solid rgba(0, 242, 254, 0.35);
  border-radius: var(--radius-lg);
  box-shadow: 0 25px 60px -15px rgba(0, 0, 0, 0.8), 0 0 30px rgba(0, 242, 254, 0.15);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  max-height: 80vh;
}

.search-input-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 18px 24px;
  border-bottom: 1px solid var(--border-subtle);
}

.search-main-input {
  flex: 1;
  background: transparent;
  border: none;
  font-family: var(--font-body);
  font-size: 1.15rem;
  color: #fff;
  outline: none;
}

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

.search-results-list {
  overflow-y: auto;
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.search-result-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  text-decoration: none;
  transition: all var(--trans-fast);
  cursor: pointer;
}

.search-result-item:hover, .search-result-item.selected {
  background: rgba(0, 242, 254, 0.1);
  color: var(--cyan-bright);
}

.search-item-left {
  display: flex;
  flex-direction: column;
}

.search-item-title {
  font-weight: 600;
  font-size: 0.95rem;
}

.search-item-sub {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.search-item-badge {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-secondary);
}

/* ========================================================
   TOAST NOTIFICATION
   ======================================================== */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 3000;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.toast {
  background: #0f172a;
  border: 1px solid var(--cyan-bright);
  color: #fff;
  padding: 12px 20px;
  border-radius: var(--radius-sm);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
  font-size: 0.88rem;
  animation: slideIn 0.25s ease-out;
}

@keyframes slideIn {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}