/* ==========================================================================
   ThunderboltX Homepage - Phase 1 Complete Structure Stylesheet
   Color Palette: Deep black background (#080909), subtle borders, soft white/gray typography, restrained copper accents (#9E735B, #B3856D, #C58A4B).
   ========================================================================== */

:root {
  --tbx-bg-main: #080909;
  --tbx-bg-card: #0D0F12;
  --tbx-bg-card-hover: #13171C;
  --tbx-bg-subtle: #161A20;
  --tbx-border: rgba(255, 255, 255, 0.08);
  --tbx-border-hover: rgba(158, 115, 91, 0.45);
  --tbx-copper: #9E735B;
  --tbx-copper-light: #B3856D;
  --tbx-copper-accent: #C58A4B;
  --tbx-copper-glow: rgba(158, 115, 91, 0.15);
  --tbx-text-main: #FFFFFF;
  --tbx-text-secondary: #9CA3AF;
  --tbx-text-dim: #6B7280;
}

/* Base Utility Classes */
.tbx-section-container {
  max-width: 1280px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

@media (min-width: 640px) {
  .tbx-section-container {
    padding-left: 2rem;
    padding-right: 2rem;
  }
}

@media (min-width: 1024px) {
  .tbx-section-container {
    padding-left: 2.5rem;
    padding-right: 2.5rem;
  }
}

/* Badge styling */
.tbx-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.85rem;
  border-radius: 9999px;
  font-family: var(--font-lausanne, 'Lausanne', sans-serif);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  background-color: rgba(158, 115, 91, 0.12);
  border: 1px solid rgba(158, 115, 91, 0.3);
  color: #C58A4B;
}

.tbx-badge-neutral {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.85rem;
  border-radius: 9999px;
  font-family: var(--font-lausanne, 'Lausanne', sans-serif);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  background-color: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: #9CA3AF;
}

/* Standard Section Cards */
.tbx-card {
  background-color: var(--tbx-bg-card);
  border: 1px solid var(--tbx-border);
  border-radius: 0.75rem;
  padding: 1.75rem;
  transition: all 0.25s ease-in-out;
  position: relative;
  overflow: hidden;
}

.tbx-card:hover {
  background-color: var(--tbx-bg-card-hover);
  border-color: var(--tbx-border-hover);
  transform: translateY(-2px);
  box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.5), 0 0 20px -2px var(--tbx-copper-glow);
}

/* Tab Filter Buttons */
.tbx-tab-btn {
  padding: 0.6rem 1.25rem;
  border-radius: 0.5rem;
  font-family: var(--font-lausanne, 'Lausanne', sans-serif);
  font-size: 0.875rem;
  font-weight: 600;
  color: #9CA3AF;
  background-color: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.07);
  transition: all 0.2s ease;
  cursor: pointer;
  white-space: nowrap;
}

.tbx-tab-btn:hover {
  color: #FFFFFF;
  background-color: rgba(255, 255, 255, 0.07);
  border-color: rgba(255, 255, 255, 0.15);
}

.tbx-tab-btn.active {
  color: #FFFFFF;
  background-color: rgba(158, 115, 91, 0.18);
  border-color: rgba(158, 115, 91, 0.6);
  box-shadow: 0 0 12px rgba(158, 115, 91, 0.2);
}

/* Icon Box */
.tbx-icon-container {
  width: 2.75rem;
  height: 2.75rem;
  border-radius: 0.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(158, 115, 91, 0.12);
  border: 1px solid rgba(158, 115, 91, 0.25);
  color: #C58A4B;
  flex-shrink: 0;
}

/* Feature Item Group */
.tbx-feature-check-item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  margin-top: 0.75rem;
}

.tbx-feature-check-bullet {
  width: 1.25rem;
  height: 1.25rem;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(158, 115, 91, 0.15);
  color: #C58A4B;
  font-size: 0.75rem;
  flex-shrink: 0;
  margin-top: 0.125rem;
}

/* Code / Tech Pill */
.tbx-tech-pill {
  font-family: var(--font-lausanne, 'Lausanne', sans-serif);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  padding: 0.2rem 0.5rem;
  border-radius: 0.25rem;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: #D1D5DB;
}

/* Section divider line removed per design */
.tbx-section-divider {
  display: none !important;
  height: 0 !important;
  margin: 0 !important;
  padding: 0 !important;
  border: none !important;
}

/* Back to Top button */
.tbx-back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 2.75rem;
  height: 2.75rem;
  border-radius: 50%;
  background-color: #0E1013;
  border: 1px solid rgba(158, 115, 91, 0.4);
  color: #C58A4B;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 40;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: all 0.25s ease;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.5);
}

.tbx-back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.tbx-back-to-top:hover {
  background-color: #1A1E24;
  border-color: #C58A4B;
  transform: translateY(-2px);
}