/* ==========================================================================
   COMPREHENSIVE RESPONSIVE SYSTEM - TradeSignals
   Mobile-First Approach: 320px → 1920px+
   ========================================================================== */

/* ==========================================================================
   RESPONSIVE BREAKPOINTS - Mobile First
   ========================================================================== */
:root {
  /* Breakpoint Variables */
  --breakpoint-xs: 320px;   /* Small Mobile */
  --breakpoint-sm: 480px;   /* Large Mobile */
  --breakpoint-md: 768px;   /* Tablet */
  --breakpoint-lg: 1024px;  /* Laptop */
  --breakpoint-xl: 1440px;  /* Desktop */
  --breakpoint-2xl: 1920px; /* Large Desktop */

  /* Container Max Widths */
  --container-xs: 100%;
  --container-sm: 100%;
  --container-md: 100%;
  --container-lg: 960px;
  --container-xl: 1140px;
  --container-2xl: 1320px;

  /* Responsive Spacing - Mobile First */
  --container-padding-xs: 1rem;    /* 16px */
  --container-padding-sm: 1.25rem; /* 20px */
  --container-padding-md: 1.5rem;  /* 24px */
  --container-padding-lg: 2rem;    /* 32px */
  --container-padding-xl: 2.5rem;  /* 40px */
  --container-padding-2xl: 3rem;   /* 48px */

  /* Fluid Spacing with clamp() */
  --spacing-fluid-xs: clamp(0.25rem, 2vw, 0.5rem);
  --spacing-fluid-sm: clamp(0.5rem, 3vw, 1rem);
  --spacing-fluid-md: clamp(1rem, 4vw, 1.5rem);
  --spacing-fluid-lg: clamp(1.5rem, 5vw, 2rem);
  --spacing-fluid-xl: clamp(2rem, 6vw, 3rem);
  --spacing-fluid-2xl: clamp(3rem, 8vw, 4rem);

  /* Fluid Typography with clamp() */
  --text-fluid-xs: clamp(0.75rem, 2vw, 0.875rem);
  --text-fluid-sm: clamp(0.875rem, 2.5vw, 1rem);
  --text-fluid-base: clamp(1rem, 3vw, 1.125rem);
  --text-fluid-lg: clamp(1.125rem, 3.5vw, 1.25rem);
  --text-fluid-xl: clamp(1.25rem, 4vw, 1.5rem);
  --text-fluid-2xl: clamp(1.5rem, 5vw, 2rem);
  --text-fluid-3xl: clamp(2rem, 6vw, 3rem);
  --text-fluid-4xl: clamp(2.5rem, 7vw, 4rem);
  --text-fluid-5xl: clamp(3rem, 8vw, 5rem);

  /* Responsive Grid Gaps */
  --grid-gap-xs: 0.75rem;
  --grid-gap-sm: 1rem;
  --grid-gap-md: 1.5rem;
  --grid-gap-lg: 2rem;
  --grid-gap-xl: 2.5rem;
}

/* ==========================================================================
   RESPONSIVE CONTAINER SYSTEM
   ========================================================================== */
.container,
.responsive-container {
  width: 100%;
  max-width: var(--container-xs);
  margin: 0 auto;
  padding: 0 var(--container-padding-xs);
  box-sizing: border-box;
}

.container-fluid,
.container-full {
  width: 100%;
  padding: 0 var(--container-padding-xs);
  box-sizing: border-box;
}

/* Mobile First Container Breakpoints */
@media (min-width: 480px) {
  .container,
  .responsive-container {
    max-width: var(--container-sm);
    padding: 0 var(--container-padding-sm);
  }
  
  .container-fluid,
  .container-full {
    padding: 0 var(--container-padding-sm);
  }
}

@media (min-width: 768px) {
  .container,
  .responsive-container {
    max-width: var(--container-md);
    padding: 0 var(--container-padding-md);
  }
  
  .container-fluid,
  .container-full {
    padding: 0 var(--container-padding-md);
  }
}

@media (min-width: 1024px) {
  .container,
  .responsive-container {
    max-width: var(--container-lg);
    padding: 0 var(--container-padding-lg);
  }
  
  .container-fluid,
  .container-full {
    padding: 0 var(--container-padding-lg);
  }
}

@media (min-width: 1440px) {
  .container,
  .responsive-container {
    max-width: var(--container-xl);
    padding: 0 var(--container-padding-xl);
  }
  
  .container-fluid,
  .container-full {
    padding: 0 var(--container-padding-xl);
  }
}

@media (min-width: 1920px) {
  .container,
  .responsive-container {
    max-width: var(--container-2xl);
    padding: 0 var(--container-padding-2xl);
  }
  
  .container-fluid,
  .container-full {
    padding: 0 var(--container-padding-2xl);
  }
}

/* ==========================================================================
   RESPONSIVE GRID SYSTEM
   ========================================================================== */
.responsive-grid {
  display: grid;
  gap: var(--grid-gap-xs);
  grid-template-columns: 1fr;
}

/* Two Column Grid */
.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(min(280px, 100%), 1fr));
}

/* Three Column Grid */
.grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(min(250px, 100%), 1fr));
}

/* Four Column Grid */
.grid-4 {
  grid-template-columns: repeat(auto-fit, minmax(min(220px, 100%), 1fr));
}

/* Auto Grid with Minmax */
.grid-auto {
  grid-template-columns: repeat(auto-fit, minmax(min(300px, 100%), 1fr));
}

/* Responsive Grid Gaps */
@media (min-width: 480px) {
  .responsive-grid {
    gap: var(--grid-gap-sm);
  }
}

@media (min-width: 768px) {
  .responsive-grid {
    gap: var(--grid-gap-md);
  }
}

@media (min-width: 1024px) {
  .responsive-grid {
    gap: var(--grid-gap-lg);
  }
}

@media (min-width: 1440px) {
  .responsive-grid {
    gap: var(--grid-gap-xl);
  }
}

/* ==========================================================================
   RESPONSIVE FLEXBOX SYSTEM
   ========================================================================== */
.flex-responsive {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-fluid-sm);
}

.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

.flex-between {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.flex-column {
  flex-direction: column;
}

.flex-wrap {
  flex-wrap: wrap;
}

/* ==========================================================================
   RESPONSIVE TYPOGRAPHY CLASSES
   ========================================================================== */
.text-responsive-xs { font-size: var(--text-fluid-xs); }
.text-responsive-sm { font-size: var(--text-fluid-sm); }
.text-responsive-base { font-size: var(--text-fluid-base); }
.text-responsive-lg { font-size: var(--text-fluid-lg); }
.text-responsive-xl { font-size: var(--text-fluid-xl); }
.text-responsive-2xl { font-size: var(--text-fluid-2xl); }
.text-responsive-3xl { font-size: var(--text-fluid-3xl); }
.text-responsive-4xl { font-size: var(--text-fluid-4xl); }
.text-responsive-5xl { font-size: var(--text-fluid-5xl); }

/* ==========================================================================
   RESPONSIVE VISIBILITY CLASSES
   ========================================================================== */

/* Hide on specific breakpoints */
.hidden-xs { display: none !important; }
.hidden-sm { display: none !important; }
.hidden-md { display: none !important; }
.hidden-lg { display: none !important; }
.hidden-xl { display: none !important; }

/* Show only on specific breakpoints */
@media (max-width: 479px) {
  .visible-xs { display: block !important; }
  .hidden-xs { display: none !important; }
}

@media (min-width: 480px) and (max-width: 767px) {
  .visible-sm { display: block !important; }
  .hidden-sm { display: none !important; }
}

@media (min-width: 768px) and (max-width: 1023px) {
  .visible-md { display: block !important; }
  .hidden-md { display: none !important; }
}

@media (min-width: 1024px) and (max-width: 1439px) {
  .visible-lg { display: block !important; }
  .hidden-lg { display: none !important; }
}

@media (min-width: 1440px) {
  .visible-xl { display: block !important; }
  .hidden-xl { display: none !important; }
}

/* ==========================================================================
   RESPONSIVE UTILITIES
   ========================================================================== */

/* Responsive Spacing */
.spacing-responsive-xs { padding: var(--spacing-fluid-xs); }
.spacing-responsive-sm { padding: var(--spacing-fluid-sm); }
.spacing-responsive-md { padding: var(--spacing-fluid-md); }
.spacing-responsive-lg { padding: var(--spacing-fluid-lg); }
.spacing-responsive-xl { padding: var(--spacing-fluid-xl); }

/* Responsive Margins */
.margin-responsive-xs { margin: var(--spacing-fluid-xs); }
.margin-responsive-sm { margin: var(--spacing-fluid-sm); }
.margin-responsive-md { margin: var(--spacing-fluid-md); }
.margin-responsive-lg { margin: var(--spacing-fluid-lg); }
.margin-responsive-xl { margin: var(--spacing-fluid-xl); }

/* ==========================================================================
   MOBILE-FIRST RESPONSIVE HELPERS
   ========================================================================== */

/* Touch-friendly tap targets (44px minimum) */
.touch-target {
  min-height: 44px;
  min-width: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

/* Prevent horizontal scroll */
.no-overflow {
  overflow-x: hidden;
}

/* Responsive images */
.img-responsive {
  max-width: 100%;
  height: auto;
}

/* Responsive aspect ratio */
.aspect-responsive {
  position: relative;
  width: 100%;
  padding-bottom: 56.25%; /* 16:9 aspect ratio */
}

.aspect-responsive > * {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ==========================================================================
   SPECIALIZED COMPONENT RESPONSIVENESS
   ========================================================================== */

/* Cards responsive */
.card-responsive {
  background: white;
  border-radius: var(--radius-lg);
  padding: var(--spacing-fluid-md);
  box-shadow: var(--shadow-md);
  width: 100%;
  max-width: 100%;
  box-sizing: border-box;
}

/* Buttons responsive */
.btn-responsive {
  padding: var(--spacing-fluid-sm) var(--spacing-fluid-md);
  font-size: var(--text-fluid-sm);
  border-radius: var(--radius);
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: all var(--transition-smooth);
  white-space: nowrap;
}

/* Forms responsive */
.form-responsive {
  width: 100%;
  max-width: 100%;
}

.form-responsive input,
.form-responsive textarea,
.form-responsive select {
  width: 100%;
  padding: var(--spacing-fluid-sm);
  font-size: var(--text-fluid-base);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  box-sizing: border-box;
  min-height: 44px;
}

/* Navigation responsive */
.nav-responsive {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-fluid-sm);
}

@media (min-width: 768px) {
  .nav-responsive {
    flex-direction: row;
    align-items: center;
  }
}

/* ==========================================================================
   PRINT STYLES
   ========================================================================== */
@media print {
  .container,
  .responsive-container {
    max-width: none;
    padding: 0;
  }
  
  .hidden-print {
    display: none !important;
  }
}