/* ================================================================
   Brokertricks Modern Base Stylesheet
   Mobile-first, clean, modern UI defaults and utilities.
   ================================================================ */

/* --- Modern Box Sizing & Fluid Reset --- */
*, *::before, *::after {
  box-sizing: border-box;
}

body {
  font-family: var(--btx-font-sans);
  color: var(--btx-text-main);
  background-color: var(--btx-bg-page);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  line-height: 1.5;
  margin: 0;
}

/* --- Responsive Containers --- */
.btx-container {
  width: 100%;
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--btx-space-4);
  padding-right: var(--btx-space-4);
}

@media (min-width: 640px) {
  .btx-container {
    padding-left: var(--btx-space-6);
    padding-right: var(--btx-space-6);
  }
}

.btx-container--sm { max-width: var(--btx-container-sm); }
.btx-container--md { max-width: var(--btx-container-md); }
.btx-container--lg { max-width: var(--btx-container-lg); }
.btx-container--xl { max-width: var(--btx-container-xl); }
.btx-container--full { max-width: 100%; }

/* --- Modern Card System --- */
.btx-card {
  background: var(--btx-bg-surface);
  border: 1px solid var(--btx-border-color);
  border-radius: var(--btx-radius-md);
  box-shadow: var(--btx-shadow-sm);
  padding: var(--btx-space-4);
  transition: transform var(--btx-transition-fast), box-shadow var(--btx-transition-fast);
}

@media (min-width: 640px) {
  .btx-card {
    padding: var(--btx-space-6);
  }
}

.btx-card--interactive:hover {
  transform: translateY(-2px);
  box-shadow: var(--btx-shadow-md);
}

/* --- Modern Responsive Grid --- */
.btx-grid {
  display: grid;
  gap: var(--btx-space-4);
  grid-template-columns: 1fr;
}

@media (min-width: 640px) {
  .btx-grid--cols-2 { grid-template-columns: repeat(2, 1fr); }
  .btx-grid--cols-3 { grid-template-columns: repeat(2, 1fr); }
  .btx-grid--cols-4 { grid-template-columns: repeat(2, 1fr); }
  .btx-grid { gap: var(--btx-space-6); }
}

@media (min-width: 1024px) {
  .btx-grid--cols-3 { grid-template-columns: repeat(3, 1fr); }
  .btx-grid--cols-4 { grid-template-columns: repeat(4, 1fr); }
}

/* --- Modern Flex Utilities --- */
.btx-flex { display: flex; }
.btx-flex-col { display: flex; flex-direction: column; }
.btx-items-center { align-items: center; }
.btx-justify-between { justify-content: space-between; }
.btx-justify-center { justify-content: center; }
.btx-gap-2 { gap: var(--btx-space-2); }
.btx-gap-3 { gap: var(--btx-space-3); }
.btx-gap-4 { gap: var(--btx-space-4); }
.btx-gap-6 { gap: var(--btx-space-6); }

/* --- Button Styling --- */
.btx-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--btx-space-2);
  padding: 0.625rem 1.25rem;
  font-size: var(--btx-text-sm);
  font-weight: 600;
  border-radius: var(--btx-radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none !important;
  transition: all var(--btx-transition-fast);
  line-height: 1.25;
  white-space: nowrap;
}

.btx-btn--primary {
  background-color: var(--btx-color-brand);
  color: var(--btx-text-inverse) !important;
}

.btx-btn--primary:hover {
  background-color: var(--btx-color-brand-dark);
}

.btx-btn--secondary {
  background-color: var(--btx-bg-surface);
  border-color: var(--btx-border-color);
  color: var(--btx-gray-700) !important;
}

.btx-btn--secondary:hover {
  background-color: var(--btx-gray-50);
  border-color: var(--btx-gray-400);
  color: var(--btx-gray-900) !important;
}

.btx-btn--block {
  display: flex;
  width: 100%;
}

/* --- Mobile Visibility Helpers --- */
@media (max-width: 639px) {
  .btx-hide-mobile { display: none !important; }
}

@media (min-width: 640px) {
  .btx-hide-desktop { display: none !important; }
}

/* --- Typography Utilities --- */
.btx-heading-1 {
  font-size: var(--btx-text-4xl);
  font-weight: 700;
  line-height: 1.2;
  color: var(--btx-gray-900);
  margin-top: 0;
  margin-bottom: var(--btx-space-4);
}

.btx-heading-2 {
  font-size: var(--btx-text-3xl);
  font-weight: 700;
  line-height: 1.25;
  color: var(--btx-gray-900);
  margin-top: 0;
  margin-bottom: var(--btx-space-3);
}

.btx-heading-3 {
  font-size: var(--btx-text-2xl);
  font-weight: 600;
  line-height: 1.3;
  color: var(--btx-gray-800);
  margin-top: 0;
  margin-bottom: var(--btx-space-2);
}

.btx-text-muted {
  color: var(--btx-text-muted);
}