/* ============================================
   WALLS BASE - CSS VARIABLES SYSTEM
   ============================================
   সহজেই পরিবর্তনযোগ্য CSS Variables
   Root variables দিয়ে সব কিছু customize করা যাবে
   Margin এবং Padding 0% (আপাতত)
   ============================================ */

:root {
    /* ========== Layout Control ========== */
    --walls-max-width: 100%;
    --walls-container-padding: 20px 5%;
    --walls-gap: 20px;
    
    /* Colors */
    --walls-bg: #ffffff;
    --walls-card-bg: #ffffff;
    --walls-border: #e9ecef;
    --walls-text-primary: #2c3e50;
    --walls-text-secondary: #6c757d;
    --walls-text-muted: #95a5a6;
    --walls-primary: #667eea;
    --walls-primary-hover: #5568d3;
    --walls-success: #4caf50;
    --walls-danger: #e74c3c;
    --walls-warning: #f59e0b;
    --walls-info: #3b82f6;
    --walls-gradient-start: #667eea;
    --walls-gradient-end: #764ba2;
    
    /* Spacing */
    --walls-padding: 20px;
    --walls-padding-lg: 30px;
    --walls-padding-md: 20px;
    --walls-padding-sm: 15px;
    --walls-padding-xs: 10px;
    --walls-margin: 20px;
    --walls-margin-lg: 30px;
    --walls-margin-md: 20px;
    --walls-margin-sm: 15px;
    --walls-margin-xs: 10px;
    
    /* Border Radius */
    --walls-radius: 12px;
    --walls-radius-lg: 16px;
    --walls-radius-md: 12px;
    --walls-radius-sm: 8px;
    --walls-radius-xs: 6px;
    --walls-radius-full: 50%;
    
    /* Shadows */
    --walls-shadow: 0 2px 8px rgba(0,0,0,0.1);
    --walls-shadow-hover: 0 4px 12px rgba(0,0,0,0.15);
    --walls-shadow-lg: 0 6px 20px rgba(102, 126, 234, 0.4);
    
    /* Typography */
    --walls-font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    --walls-font-family-bangla: 'Noto Sans Bengali', 'Kalpurush', 'SolaimanLipi', sans-serif;
    --walls-font-size-base: 1rem;
    --walls-font-size-lg: 1.25rem;
    --walls-font-size-xl: 1.5rem;
    --walls-font-size-xxl: 2rem;
    --walls-font-size-sm: 0.875rem;
    --walls-font-size-xs: 0.75rem;
    --walls-line-height: 1.5;
    --walls-font-weight-normal: 400;
    --walls-font-weight-medium: 500;
    --walls-font-weight-semibold: 600;
    --walls-font-weight-bold: 700;
    
    /* Form Elements */
    --walls-input-height: 48px;
    --walls-input-padding: 12px 16px;
    --walls-input-border-width: 2px;
    --walls-button-height: 48px;
    --walls-button-padding: 12px 28px;
    
    /* Z-index */
    --walls-z-base: 1;
    --walls-z-dropdown: 10;
    --walls-z-sticky: 100;
    --walls-z-modal: 1000;
    --walls-z-overlay: 9999;
    
    /* Transitions */
    --walls-transition-fast: 0.15s ease;
    --walls-transition-base: 0.3s ease;
    --walls-transition-slow: 0.5s ease;
    
    /* Breakpoints (for reference) */
    --walls-breakpoint-xs: 0;
    --walls-breakpoint-sm: 576px;
    --walls-breakpoint-md: 768px;
    --walls-breakpoint-lg: 992px;
    --walls-breakpoint-xl: 1200px;
    --walls-breakpoint-xxl: 1400px;
}

/* ============================================
   BANGLA FONT SUPPORT - GLOBAL
   ============================================ */

[lang="bn"],
.bangla-text,
.bn {
    font-family: var(--walls-font-family-bangla), var(--walls-font-family);
}

/* ============================================
   BASE RESET - ZERO MARGIN & PADDING
   ============================================ */

.walls-base-container {
    max-width: var(--walls-max-width);
    margin: 0 auto;
    padding: var(--walls-container-padding);
}

.walls-base-container * {
    box-sizing: border-box;
}

/* ============================================
   UTILITY CLASSES
   ============================================ */

/* Spacing Utilities (currently 0) */
.walls-p-0 { padding: var(--walls-padding); }
.walls-m-0 { margin: var(--walls-margin); }
.walls-pt-0 { padding-top: var(--walls-padding); }
.walls-pb-0 { padding-bottom: var(--walls-padding); }
.walls-pl-0 { padding-left: var(--walls-padding); }
.walls-pr-0 { padding-right: var(--walls-padding); }
.walls-mt-0 { margin-top: var(--walls-margin); }
.walls-mb-0 { margin-bottom: var(--walls-margin); }
.walls-ml-0 { margin-left: var(--walls-margin); }
.walls-mr-0 { margin-right: var(--walls-margin); }

/* Text Utilities */
.walls-text-primary { color: var(--walls-text-primary); }
.walls-text-secondary { color: var(--walls-text-secondary); }
.walls-text-muted { color: var(--walls-text-muted); }
.walls-text-center { text-align: center; }
.walls-text-left { text-align: left; }
.walls-text-right { text-align: right; }

/* Font Weight */
.walls-fw-normal { font-weight: var(--walls-font-weight-normal); }
.walls-fw-medium { font-weight: var(--walls-font-weight-medium); }
.walls-fw-semibold { font-weight: var(--walls-font-weight-semibold); }
.walls-fw-bold { font-weight: var(--walls-font-weight-bold); }

/* Font Size */
.walls-fs-xs { font-size: var(--walls-font-size-xs); }
.walls-fs-sm { font-size: var(--walls-font-size-sm); }
.walls-fs-base { font-size: var(--walls-font-size-base); }
.walls-fs-lg { font-size: var(--walls-font-size-lg); }
.walls-fs-xl { font-size: var(--walls-font-size-xl); }
.walls-fs-xxl { font-size: var(--walls-font-size-xxl); }

/* Background Colors */
.walls-bg-primary { background-color: var(--walls-primary); }
.walls-bg-success { background-color: var(--walls-success); }
.walls-bg-danger { background-color: var(--walls-danger); }
.walls-bg-warning { background-color: var(--walls-warning); }
.walls-bg-info { background-color: var(--walls-info); }
.walls-bg-white { background-color: #ffffff; }
.walls-bg-light { background-color: #f8f9fa; }
.walls-bg-dark { background-color: #343a40; }

/* Border Radius */
.walls-rounded { border-radius: var(--walls-radius); }
.walls-rounded-lg { border-radius: var(--walls-radius-lg); }
.walls-rounded-md { border-radius: var(--walls-radius-md); }
.walls-rounded-sm { border-radius: var(--walls-radius-sm); }
.walls-rounded-xs { border-radius: var(--walls-radius-xs); }
.walls-rounded-full { border-radius: var(--walls-radius-full); }
.walls-rounded-0 { border-radius: 0; }

/* Display Utilities */
.walls-d-none { display: none; }
.walls-d-block { display: block; }
.walls-d-inline { display: inline; }
.walls-d-inline-block { display: inline-block; }
.walls-d-flex { display: flex; }
.walls-d-grid { display: grid; }

/* Flex Utilities */
.walls-flex-row { flex-direction: row; }
.walls-flex-column { flex-direction: column; }
.walls-flex-wrap { flex-wrap: wrap; }
.walls-flex-nowrap { flex-wrap: nowrap; }
.walls-justify-start { justify-content: flex-start; }
.walls-justify-end { justify-content: flex-end; }
.walls-justify-center { justify-content: center; }
.walls-justify-between { justify-content: space-between; }
.walls-justify-around { justify-content: space-around; }
.walls-align-start { align-items: flex-start; }
.walls-align-end { align-items: flex-end; }
.walls-align-center { align-items: center; }
.walls-align-stretch { align-items: stretch; }

/* Width Utilities */
.walls-w-100 { width: 100%; }
.walls-w-75 { width: 75%; }
.walls-w-50 { width: 50%; }
.walls-w-25 { width: 25%; }
.walls-w-auto { width: auto; }

/* Height Utilities */
.walls-h-100 { height: 100%; }
.walls-h-auto { height: auto; }
.walls-vh-100 { height: 100vh; }

/* Position Utilities */
.walls-position-relative { position: relative; }
.walls-position-absolute { position: absolute; }
.walls-position-fixed { position: fixed; }
.walls-position-sticky { position: sticky; }

/* Overflow Utilities */
.walls-overflow-hidden { overflow: hidden; }
.walls-overflow-auto { overflow: auto; }
.walls-overflow-scroll { overflow: scroll; }
.walls-overflow-x-hidden { overflow-x: hidden; }
.walls-overflow-y-hidden { overflow-y: hidden; }
.walls-overflow-x-auto { overflow-x: auto; }
.walls-overflow-y-auto { overflow-y: auto; }

/* Shadow Utilities */
.walls-shadow { box-shadow: var(--walls-shadow); }
.walls-shadow-hover:hover { box-shadow: var(--walls-shadow-hover); }
.walls-shadow-lg { box-shadow: var(--walls-shadow-lg); }
.walls-shadow-none { box-shadow: none; }

/* Transition Utilities */
.walls-transition-fast { transition: all var(--walls-transition-fast); }
.walls-transition-base { transition: all var(--walls-transition-base); }
.walls-transition-slow { transition: all var(--walls-transition-slow); }

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

/* Small devices (landscape phones, 576px and up) */
@media (min-width: 576px) {
    .walls-d-sm-none { display: none; }
    .walls-d-sm-block { display: block; }
    .walls-d-sm-flex { display: flex; }
}

/* Medium devices (tablets, 768px and up) */
@media (min-width: 768px) {
    .walls-d-md-none { display: none; }
    .walls-d-md-block { display: block; }
    .walls-d-md-flex { display: flex; }
}

/* Large devices (desktops, 992px and up) */
@media (min-width: 992px) {
    .walls-d-lg-none { display: none; }
    .walls-d-lg-block { display: block; }
    .walls-d-lg-flex { display: flex; }
}

/* Extra large devices (large desktops, 1200px and up) */
@media (min-width: 1200px) {
    .walls-d-xl-none { display: none; }
    .walls-d-xl-block { display: block; }
    .walls-d-xl-flex { display: flex; }
}

/* ============================================
   EXAMPLE: HOW TO CUSTOMIZE
   ============================================
   
   আপনি যেকোনো সময় root variables পরিবর্তন করতে পারবেন:
   
   :root {
       --walls-padding: 20px;        // Padding যোগ করতে চাইলে
       --walls-margin: 15px;         // Margin যোগ করতে চাইলে
       --walls-radius: 12px;         // Border radius যোগ করতে চাইলে
       --walls-shadow: 0 2px 8px rgba(0,0,0,0.1);  // Shadow যোগ করতে চাইলে
       --walls-primary: #your-color; // Primary color পরিবর্তন করতে চাইলে
   }
   
   অথবা specific element এর জন্য:
   
   .my-custom-container {
       padding: var(--walls-padding-lg);
       margin: var(--walls-margin-md);
       border-radius: var(--walls-radius);
       box-shadow: var(--walls-shadow);
   }
   
   ============================================ */

/* ============================================
   PRINT STYLES
   ============================================ */

@media print {
    .walls-base-container {
        margin: 0;
        padding: 0;
    }
    
    .walls-shadow,
    .walls-shadow-hover,
    .walls-shadow-lg {
        box-shadow: none !important;
    }
}

/* ============================================
   ACCESSIBILITY
   ============================================ */

/* Focus visible for keyboard navigation */
.walls-base-container *:focus-visible {
    outline: 2px solid var(--walls-primary);
    outline-offset: 2px;
}

/* Reduced motion for users who prefer it */
@media (prefers-reduced-motion: reduce) {
    .walls-transition-fast,
    .walls-transition-base,
    .walls-transition-slow {
        transition: none !important;
    }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --walls-border: #000000;
        --walls-text-primary: #000000;
        --walls-text-secondary: #333333;
    }
}

/* Dark mode support (optional - can be enabled later) */
@media (prefers-color-scheme: dark) {
    /* Uncomment when ready for dark mode
    :root {
        --walls-bg: #1a1a1a;
        --walls-card-bg: #2d2d2d;
        --walls-border: #404040;
        --walls-text-primary: #ffffff;
        --walls-text-secondary: #b0b0b0;
        --walls-text-muted: #808080;
    }
    */
}