/* 
 * ATFA Unified Design System
 * All Teens Financial Academy Brand Guidelines
 * Version 2.0 - Unified Brand Experience
 */

/* ==========================================
   CSS CUSTOM PROPERTIES - MASTER VARIABLES
   ========================================== */

:root {
    /* ATFA Brand Colors - Primary System */
    --atfa-primary: #1B5E20;           /* Deep Forest Green - Money/Growth/Stability */
    --atfa-primary-light: #2E7D32;     /* Medium Green - Success */
    --atfa-primary-dark: #1B4B1F;      /* Dark Green - Trust */
    
    --atfa-secondary: #FF8F00;         /* Rich Gold - Wealth/Achievement */
    --atfa-secondary-light: #FFA726;   /* Light Gold - Prosperity */
    --atfa-secondary-dark: #E65100;    /* Deep Orange - Energy */
    
    --atfa-accent: #0D47A1;            /* Deep Blue - Education/Trust */
    --atfa-accent-light: #1976D2;      /* Medium Blue - Innovation */
    --atfa-accent-dark: #0D47A1;       /* Navy Blue - Authority */
    
    /* Neutral Color System */
    --atfa-white: #FFFFFF;
    --atfa-light: #F8F9FA;
    --atfa-gray-50: #FAFAFA;
    --atfa-gray-100: #F5F5F5;
    --atfa-gray-200: #EEEEEE;
    --atfa-gray-300: #E0E0E0;
    --atfa-gray-400: #BDBDBD;
    --atfa-gray-500: #9E9E9E;
    --atfa-gray-600: #757575;
    --atfa-gray-700: #616161;
    --atfa-gray-800: #424242;
    --atfa-gray-900: #212121;
    --atfa-black: #000000;
    
    /* Status Colors */
    --atfa-success: #4CAF50;
    --atfa-warning: #FF9800;
    --atfa-error: #F44336;
    --atfa-info: #2196F3;
    
    /* Typography System */
    --atfa-font-heading: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --atfa-font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --atfa-font-mono: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, 'Courier New', monospace;
    
    /* Font Weights */
    --atfa-weight-light: 300;
    --atfa-weight-normal: 400;
    --atfa-weight-medium: 500;
    --atfa-weight-semibold: 600;
    --atfa-weight-bold: 700;
    --atfa-weight-extrabold: 800;
    --atfa-weight-black: 900;
    
    /* Font Sizes - Consistent Scale */
    --atfa-text-xs: 0.75rem;      /* 12px */
    --atfa-text-sm: 0.875rem;     /* 14px */
    --atfa-text-base: 1rem;       /* 16px */
    --atfa-text-lg: 1.125rem;     /* 18px */
    --atfa-text-xl: 1.25rem;      /* 20px */
    --atfa-text-2xl: 1.5rem;      /* 24px */
    --atfa-text-3xl: 1.875rem;    /* 30px */
    --atfa-text-4xl: 2.25rem;     /* 36px */
    --atfa-text-5xl: 3rem;        /* 48px */
    --atfa-text-6xl: 3.75rem;     /* 60px */
    --atfa-text-7xl: 4.5rem;      /* 72px */
    
    /* Line Heights */
    --atfa-leading-tight: 1.25;
    --atfa-leading-snug: 1.375;
    --atfa-leading-normal: 1.5;
    --atfa-leading-relaxed: 1.625;
    --atfa-leading-loose: 2;
    
    /* Spacing System - Consistent Scale */
    --atfa-space-0: 0;
    --atfa-space-px: 1px;
    --atfa-space-0-5: 0.125rem;   /* 2px */
    --atfa-space-1: 0.25rem;      /* 4px */
    --atfa-space-1-5: 0.375rem;   /* 6px */
    --atfa-space-2: 0.5rem;       /* 8px */
    --atfa-space-2-5: 0.625rem;   /* 10px */
    --atfa-space-3: 0.75rem;      /* 12px */
    --atfa-space-3-5: 0.875rem;   /* 14px */
    --atfa-space-4: 1rem;         /* 16px */
    --atfa-space-5: 1.25rem;      /* 20px */
    --atfa-space-6: 1.5rem;       /* 24px */
    --atfa-space-7: 1.75rem;      /* 28px */
    --atfa-space-8: 2rem;         /* 32px */
    --atfa-space-9: 2.25rem;      /* 36px */
    --atfa-space-10: 2.5rem;      /* 40px */
    --atfa-space-11: 2.75rem;     /* 44px */
    --atfa-space-12: 3rem;        /* 48px */
    --atfa-space-14: 3.5rem;      /* 56px */
    --atfa-space-16: 4rem;        /* 64px */
    --atfa-space-20: 5rem;        /* 80px */
    --atfa-space-24: 6rem;        /* 96px */
    --atfa-space-28: 7rem;        /* 112px */
    --atfa-space-32: 8rem;        /* 128px */
    --atfa-space-36: 9rem;        /* 144px */
    --atfa-space-40: 10rem;       /* 160px */
    --atfa-space-44: 11rem;       /* 176px */
    --atfa-space-48: 12rem;       /* 192px */
    --atfa-space-52: 13rem;       /* 208px */
    --atfa-space-56: 14rem;       /* 224px */
    --atfa-space-60: 15rem;       /* 240px */
    --atfa-space-64: 16rem;       /* 256px */
    --atfa-space-72: 18rem;       /* 288px */
    --atfa-space-80: 20rem;       /* 320px */
    --atfa-space-96: 24rem;       /* 384px */
    
    /* Border Radius System */
    --atfa-radius-none: 0;
    --atfa-radius-sm: 0.125rem;    /* 2px */
    --atfa-radius-base: 0.25rem;   /* 4px */
    --atfa-radius-md: 0.375rem;    /* 6px */
    --atfa-radius-lg: 0.5rem;      /* 8px */
    --atfa-radius-xl: 0.75rem;     /* 12px */
    --atfa-radius-2xl: 1rem;       /* 16px */
    --atfa-radius-3xl: 1.5rem;     /* 24px */
    --atfa-radius-full: 9999px;
    
    /* Shadow System */
    --atfa-shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --atfa-shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --atfa-shadow-base: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --atfa-shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --atfa-shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --atfa-shadow-xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    --atfa-shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    --atfa-shadow-inner: inset 0 2px 4px 0 rgba(0, 0, 0, 0.06);
    
    /* ATFA Gradient System */
    --atfa-gradient-primary: linear-gradient(135deg, var(--atfa-primary) 0%, var(--atfa-primary-light) 100%);
    --atfa-gradient-secondary: linear-gradient(135deg, var(--atfa-secondary) 0%, var(--atfa-secondary-light) 100%);
    --atfa-gradient-accent: linear-gradient(135deg, var(--atfa-accent) 0%, var(--atfa-accent-light) 100%);
    --atfa-gradient-hero: linear-gradient(135deg, var(--atfa-primary) 0%, var(--atfa-accent) 50%, var(--atfa-secondary) 100%);
    --atfa-gradient-card: linear-gradient(135deg, var(--atfa-white) 0%, var(--atfa-light) 100%);
    --atfa-gradient-success: linear-gradient(135deg, var(--atfa-success) 0%, #66BB6A 100%);
    
    /* Animation & Transitions */
    --atfa-transition-fast: 150ms ease-out;
    --atfa-transition-base: 200ms ease-out;
    --atfa-transition-slow: 300ms ease-out;
    --atfa-transition-slower: 500ms ease-out;
    
    /* Z-Index Scale */
    --atfa-z-0: 0;
    --atfa-z-10: 10;
    --atfa-z-20: 20;
    --atfa-z-30: 30;
    --atfa-z-40: 40;
    --atfa-z-50: 50;
    --atfa-z-auto: auto;
    --atfa-z-dropdown: 1000;
    --atfa-z-sticky: 1020;
    --atfa-z-fixed: 1030;
    --atfa-z-modal-backdrop: 1040;
    --atfa-z-modal: 1050;
    --atfa-z-popover: 1060;
    --atfa-z-tooltip: 1070;
    
    /* Container & Layout */
    --atfa-container-sm: 640px;
    --atfa-container-md: 768px;
    --atfa-container-lg: 1024px;
    --atfa-container-xl: 1280px;
    --atfa-container-2xl: 1400px;
    --atfa-container-max: 1200px; /* ATFA Standard */
    
    /* Breakpoints */
    --atfa-screen-sm: 640px;
    --atfa-screen-md: 768px;
    --atfa-screen-lg: 1024px;
    --atfa-screen-xl: 1280px;
    --atfa-screen-2xl: 1536px;
}

/* ==========================================
   RESET & BASE STYLES
   ========================================== */

*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    line-height: 1.15;
    -webkit-text-size-adjust: 100%;
    -ms-text-size-adjust: 100%;
    scroll-behavior: smooth;
}

body {
    font-family: var(--atfa-font-body);
    font-size: var(--atfa-text-base);
    line-height: var(--atfa-leading-normal);
    color: var(--atfa-gray-800);
    background-color: var(--atfa-white);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ==========================================
   TYPOGRAPHY SYSTEM
   ========================================== */

h1, h2, h3, h4, h5, h6 {
    font-family: var(--atfa-font-heading);
    font-weight: var(--atfa-weight-bold);
    line-height: var(--atfa-leading-tight);
    color: var(--atfa-gray-900);
    margin-bottom: var(--atfa-space-4);
}

h1 {
    font-size: var(--atfa-text-6xl);
    font-weight: var(--atfa-weight-black);
    line-height: var(--atfa-leading-tight);
}

h2 {
    font-size: var(--atfa-text-5xl);
    font-weight: var(--atfa-weight-extrabold);
}

h3 {
    font-size: var(--atfa-text-4xl);
    font-weight: var(--atfa-weight-bold);
}

h4 {
    font-size: var(--atfa-text-3xl);
    font-weight: var(--atfa-weight-bold);
}

h5 {
    font-size: var(--atfa-text-2xl);
    font-weight: var(--atfa-weight-semibold);
}

h6 {
    font-size: var(--atfa-text-xl);
    font-weight: var(--atfa-weight-semibold);
}

p {
    margin-bottom: var(--atfa-space-4);
    line-height: var(--atfa-leading-relaxed);
}

a {
    color: var(--atfa-primary);
    text-decoration: none;
    transition: color var(--atfa-transition-base);
}

a:hover {
    color: var(--atfa-primary-light);
    text-decoration: underline;
}

/* Text Utility Classes */
.text-xs { font-size: var(--atfa-text-xs); }
.text-sm { font-size: var(--atfa-text-sm); }
.text-base { font-size: var(--atfa-text-base); }
.text-lg { font-size: var(--atfa-text-lg); }
.text-xl { font-size: var(--atfa-text-xl); }
.text-2xl { font-size: var(--atfa-text-2xl); }
.text-3xl { font-size: var(--atfa-text-3xl); }
.text-4xl { font-size: var(--atfa-text-4xl); }
.text-5xl { font-size: var(--atfa-text-5xl); }
.text-6xl { font-size: var(--atfa-text-6xl); }

.font-light { font-weight: var(--atfa-weight-light); }
.font-normal { font-weight: var(--atfa-weight-normal); }
.font-medium { font-weight: var(--atfa-weight-medium); }
.font-semibold { font-weight: var(--atfa-weight-semibold); }
.font-bold { font-weight: var(--atfa-weight-bold); }
.font-extrabold { font-weight: var(--atfa-weight-extrabold); }
.font-black { font-weight: var(--atfa-weight-black); }

/* ==========================================
   LAYOUT & CONTAINER SYSTEM
   ========================================== */

.container {
    width: 100%;
    max-width: var(--atfa-container-max);
    margin: 0 auto;
    padding-left: var(--atfa-space-4);
    padding-right: var(--atfa-space-4);
}

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

@media (min-width: 1024px) {
    .container {
        padding-left: var(--atfa-space-8);
        padding-right: var(--atfa-space-8);
    }
}

/* Section Spacing */
.section {
    padding: var(--atfa-space-20) 0;
}

.section-sm {
    padding: var(--atfa-space-16) 0;
}

.section-lg {
    padding: var(--atfa-space-24) 0;
}

.section-xl {
    padding: var(--atfa-space-32) 0;
}

/* ==========================================
   NAVIGATION COMPONENT
   ========================================== */

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--atfa-gray-200);
    z-index: var(--atfa-z-fixed);
    transition: all var(--atfa-transition-base);
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: var(--atfa-shadow-sm);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
    max-width: var(--atfa-container-max);
    margin: 0 auto;
    padding: 0 var(--atfa-space-4);
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--atfa-space-3);
    font-family: var(--atfa-font-heading);
    font-weight: var(--atfa-weight-extrabold);
    font-size: var(--atfa-text-xl);
    color: var(--atfa-primary);
    text-decoration: none;
    transition: all var(--atfa-transition-base);
}

.nav-logo:hover {
    color: var(--atfa-primary-light);
    text-decoration: none;
}

.logo-icon {
    width: 48px;
    height: 48px;
    background: var(--atfa-gradient-primary);
    border-radius: var(--atfa-radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--atfa-text-2xl);
    box-shadow: var(--atfa-shadow-base);
    transition: all var(--atfa-transition-base);
}

.nav-logo:hover .logo-icon {
    transform: scale(1.05);
    box-shadow: var(--atfa-shadow-md);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--atfa-space-8);
}

.nav-link {
    color: var(--atfa-gray-700);
    font-weight: var(--atfa-weight-medium);
    font-size: var(--atfa-text-base);
    padding: var(--atfa-space-2) var(--atfa-space-4);
    border-radius: var(--atfa-radius-lg);
    transition: all var(--atfa-transition-base);
    text-decoration: none;
}

.nav-link:hover {
    color: var(--atfa-primary);
    background-color: var(--atfa-gray-100);
    text-decoration: none;
}

.nav-link.active {
    color: var(--atfa-primary);
    background-color: var(--atfa-gray-100);
}

/* Mobile Navigation */
.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    padding: var(--atfa-space-2);
}

.hamburger .bar {
    width: 25px;
    height: 3px;
    background-color: var(--atfa-gray-700);
    margin: 3px 0;
    transition: var(--atfa-transition-base);
    border-radius: var(--atfa-radius-base);
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 80px;
        flex-direction: column;
        background: var(--atfa-white);
        width: 100%;
        text-align: center;
        transition: var(--atfa-transition-base);
        box-shadow: var(--atfa-shadow-lg);
        padding: var(--atfa-space-8) 0;
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-link {
        padding: var(--atfa-space-4) var(--atfa-space-6);
        display: block;
        margin: var(--atfa-space-2) 0;
    }

    .hamburger {
        display: flex;
    }

    .hamburger.active .bar:nth-child(2) {
        opacity: 0;
    }

    .hamburger.active .bar:nth-child(1) {
        transform: translateY(9px) rotate(45deg);
    }

    .hamburger.active .bar:nth-child(3) {
        transform: translateY(-9px) rotate(-45deg);
    }
}

/* ==========================================
   BUTTON COMPONENT SYSTEM
   ========================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--atfa-space-2);
    padding: var(--atfa-space-3) var(--atfa-space-6);
    font-family: var(--atfa-font-heading);
    font-weight: var(--atfa-weight-semibold);
    font-size: var(--atfa-text-base);
    line-height: 1;
    border: none;
    border-radius: var(--atfa-radius-xl);
    cursor: pointer;
    transition: all var(--atfa-transition-base);
    text-decoration: none;
    white-space: nowrap;
}

.btn:focus {
    outline: 2px solid var(--atfa-primary);
    outline-offset: 2px;
}

/* Primary Button */
.btn-primary {
    background: var(--atfa-gradient-primary);
    color: var(--atfa-white);
    box-shadow: var(--atfa-shadow-base);
}

.btn-primary:hover {
    transform: translateY(-2px) scale(1.02);
    box-shadow: var(--atfa-shadow-lg);
    color: var(--atfa-white);
}

/* Secondary Button */
.btn-secondary {
    background: var(--atfa-gradient-secondary);
    color: var(--atfa-white);
    box-shadow: var(--atfa-shadow-base);
}

.btn-secondary:hover {
    transform: translateY(-2px) scale(1.02);
    box-shadow: var(--atfa-shadow-lg);
    color: var(--atfa-white);
}

/* EARN Button - Special ATFA Button */
.btn-earn {
    background: var(--atfa-gradient-secondary);
    color: var(--atfa-white);
    padding: var(--atfa-space-4) var(--atfa-space-8);
    font-weight: var(--atfa-weight-bold);
    font-size: var(--atfa-text-lg);
    box-shadow: var(--atfa-shadow-base);
}

.btn-earn:hover {
    transform: translateY(-3px) scale(1.05);
    box-shadow: var(--atfa-shadow-xl);
    color: var(--atfa-white);
}

/* Outline Buttons */
.btn-outline {
    background: transparent;
    color: var(--atfa-primary);
    border: 2px solid var(--atfa-primary);
}

.btn-outline:hover {
    background: var(--atfa-primary);
    color: var(--atfa-white);
    transform: translateY(-2px);
    box-shadow: var(--atfa-shadow-md);
}

/* Ghost Button */
.btn-ghost {
    background: transparent;
    color: var(--atfa-gray-700);
    border: 2px solid var(--atfa-gray-300);
}

.btn-ghost:hover {
    background: var(--atfa-gray-100);
    border-color: var(--atfa-gray-400);
    color: var(--atfa-gray-900);
}

/* Button Sizes */
.btn-sm {
    padding: var(--atfa-space-2) var(--atfa-space-4);
    font-size: var(--atfa-text-sm);
}

.btn-lg {
    padding: var(--atfa-space-4) var(--atfa-space-8);
    font-size: var(--atfa-text-lg);
}

.btn-xl {
    padding: var(--atfa-space-5) var(--atfa-space-12);
    font-size: var(--atfa-text-xl);
}

/* ==========================================
   CARD COMPONENT SYSTEM
   ========================================== */

.card {
    background: var(--atfa-white);
    border-radius: var(--atfa-radius-2xl);
    box-shadow: var(--atfa-shadow-base);
    overflow: hidden;
    transition: all var(--atfa-transition-base);
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--atfa-shadow-lg);
}

.card-header {
    padding: var(--atfa-space-6);
    border-bottom: 1px solid var(--atfa-gray-200);
}

.card-body {
    padding: var(--atfa-space-6);
}

.card-footer {
    padding: var(--atfa-space-6);
    background: var(--atfa-gray-50);
    border-top: 1px solid var(--atfa-gray-200);
}

/* Featured Card */
.card-featured {
    border: 2px solid var(--atfa-secondary);
    background: linear-gradient(135deg, var(--atfa-white) 0%, #FFF8E1 100%);
}

/* ==========================================
   FORM COMPONENT SYSTEM
   ========================================== */

.form-group {
    margin-bottom: var(--atfa-space-6);
}

.form-label {
    display: block;
    font-weight: var(--atfa-weight-semibold);
    color: var(--atfa-gray-800);
    margin-bottom: var(--atfa-space-2);
    font-size: var(--atfa-text-sm);
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: var(--atfa-space-3) var(--atfa-space-4);
    border: 2px solid var(--atfa-gray-300);
    border-radius: var(--atfa-radius-xl);
    font-family: var(--atfa-font-body);
    font-size: var(--atfa-text-base);
    transition: all var(--atfa-transition-base);
    background: var(--atfa-white);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--atfa-primary);
    box-shadow: 0 0 0 3px rgba(27, 94, 32, 0.1);
}

.form-textarea {
    resize: vertical;
    min-height: 120px;
}

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

/* Spacing Utilities */
.m-0 { margin: 0; }
.m-1 { margin: var(--atfa-space-1); }
.m-2 { margin: var(--atfa-space-2); }
.m-3 { margin: var(--atfa-space-3); }
.m-4 { margin: var(--atfa-space-4); }
.m-5 { margin: var(--atfa-space-5); }
.m-6 { margin: var(--atfa-space-6); }
.m-8 { margin: var(--atfa-space-8); }
.m-10 { margin: var(--atfa-space-10); }
.m-12 { margin: var(--atfa-space-12); }

.p-0 { padding: 0; }
.p-1 { padding: var(--atfa-space-1); }
.p-2 { padding: var(--atfa-space-2); }
.p-3 { padding: var(--atfa-space-3); }
.p-4 { padding: var(--atfa-space-4); }
.p-5 { padding: var(--atfa-space-5); }
.p-6 { padding: var(--atfa-space-6); }
.p-8 { padding: var(--atfa-space-8); }
.p-10 { padding: var(--atfa-space-10); }
.p-12 { padding: var(--atfa-space-12); }

/* Text Alignment */
.text-left { text-align: left; }
.text-center { text-align: center; }
.text-right { text-align: right; }

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

/* Flexbox Utilities */
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.justify-around { justify-content: space-around; }
.align-center { align-items: center; }
.align-start { align-items: flex-start; }
.align-end { align-items: flex-end; }

/* Grid Utilities */
.grid-cols-1 { grid-template-columns: repeat(1, 1fr); }
.grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid-cols-4 { grid-template-columns: repeat(4, 1fr); }

.gap-1 { gap: var(--atfa-space-1); }
.gap-2 { gap: var(--atfa-space-2); }
.gap-3 { gap: var(--atfa-space-3); }
.gap-4 { gap: var(--atfa-space-4); }
.gap-6 { gap: var(--atfa-space-6); }
.gap-8 { gap: var(--atfa-space-8); }

/* Color Utilities */
.text-primary { color: var(--atfa-primary); }
.text-secondary { color: var(--atfa-secondary); }
.text-accent { color: var(--atfa-accent); }
.text-gray-600 { color: var(--atfa-gray-600); }
.text-gray-700 { color: var(--atfa-gray-700); }
.text-gray-800 { color: var(--atfa-gray-800); }
.text-gray-900 { color: var(--atfa-gray-900); }

.bg-primary { background-color: var(--atfa-primary); }
.bg-secondary { background-color: var(--atfa-secondary); }
.bg-light { background-color: var(--atfa-light); }
.bg-white { background-color: var(--atfa-white); }

/* Border Radius */
.rounded-none { border-radius: var(--atfa-radius-none); }
.rounded-sm { border-radius: var(--atfa-radius-sm); }
.rounded { border-radius: var(--atfa-radius-base); }
.rounded-md { border-radius: var(--atfa-radius-md); }
.rounded-lg { border-radius: var(--atfa-radius-lg); }
.rounded-xl { border-radius: var(--atfa-radius-xl); }
.rounded-2xl { border-radius: var(--atfa-radius-2xl); }
.rounded-3xl { border-radius: var(--atfa-radius-3xl); }
.rounded-full { border-radius: var(--atfa-radius-full); }

/* Shadow Utilities */
.shadow-xs { box-shadow: var(--atfa-shadow-xs); }
.shadow-sm { box-shadow: var(--atfa-shadow-sm); }
.shadow { box-shadow: var(--atfa-shadow-base); }
.shadow-md { box-shadow: var(--atfa-shadow-md); }
.shadow-lg { box-shadow: var(--atfa-shadow-lg); }
.shadow-xl { box-shadow: var(--atfa-shadow-xl); }
.shadow-2xl { box-shadow: var(--atfa-shadow-2xl); }

/* ==========================================
   RESPONSIVE DESIGN SYSTEM
   ========================================== */

@media (max-width: 640px) {
    .container {
        padding-left: var(--atfa-space-4);
        padding-right: var(--atfa-space-4);
    }
    
    h1 { font-size: var(--atfa-text-4xl); }
    h2 { font-size: var(--atfa-text-3xl); }
    h3 { font-size: var(--atfa-text-2xl); }
    
    .section {
        padding: var(--atfa-space-16) 0;
    }
    
    .btn-earn {
        padding: var(--atfa-space-3) var(--atfa-space-6);
        font-size: var(--atfa-text-base);
    }
}

@media (min-width: 641px) and (max-width: 768px) {
    .container {
        padding-left: var(--atfa-space-6);
        padding-right: var(--atfa-space-6);
    }
}

@media (min-width: 769px) and (max-width: 1024px) {
    .container {
        padding-left: var(--atfa-space-8);
        padding-right: var(--atfa-space-8);
    }
}

/* ==========================================
   FOOTER COMPONENT
   ========================================== */

.footer {
    background: var(--atfa-gray-900);
    color: var(--atfa-white);
    padding: var(--atfa-space-24) 0 var(--atfa-space-8);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--atfa-space-8);
    margin-bottom: var(--atfa-space-8);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--atfa-space-3);
    font-family: var(--atfa-font-heading);
    font-weight: var(--atfa-weight-extrabold);
    font-size: var(--atfa-text-xl);
    margin-bottom: var(--atfa-space-4);
}

.footer-description {
    color: var(--atfa-gray-400);
    line-height: var(--atfa-leading-relaxed);
    margin-bottom: var(--atfa-space-6);
}

.footer-title {
    font-weight: var(--atfa-weight-bold);
    margin-bottom: var(--atfa-space-4);
    color: var(--atfa-white);
}

.footer-links {
    list-style: none;
    margin: 0;
    padding: 0;
}

.footer-links li {
    margin-bottom: var(--atfa-space-3);
}

.footer-links a {
    color: var(--atfa-gray-400);
    text-decoration: none;
    transition: color var(--atfa-transition-base);
}

.footer-links a:hover {
    color: var(--atfa-white);
}

.social-links {
    display: flex;
    gap: var(--atfa-space-4);
}

.social-link {
    display: flex;
    align-items: center;
    gap: var(--atfa-space-2);
    color: var(--atfa-gray-400);
    text-decoration: none;
    padding: var(--atfa-space-3);
    border-radius: var(--atfa-radius-lg);
    transition: all var(--atfa-transition-base);
}

.social-link:hover {
    color: var(--atfa-white);
    background: var(--atfa-gray-800);
}

.footer-bottom {
    border-top: 1px solid var(--atfa-gray-700);
    padding-top: var(--atfa-space-6);
    text-align: center;
    color: var(--atfa-gray-400);
}

@media (max-width: 768px) {
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: var(--atfa-space-8);
    }
    
    .social-links {
        justify-content: center;
    }
}

/* ==========================================
   HERO SECTIONS
   ========================================== */

.hero {
    padding: var(--atfa-space-32) 0 var(--atfa-space-20);
    background: var(--atfa-gradient-hero);
    color: var(--atfa-white);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    opacity: 0.3;
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: var(--atfa-text-7xl);
    font-weight: var(--atfa-weight-black);
    margin-bottom: var(--atfa-space-6);
    line-height: var(--atfa-leading-tight);
}

.hero-subtitle {
    font-size: var(--atfa-text-xl);
    opacity: 0.9;
    max-width: 600px;
    margin: 0 auto var(--atfa-space-8);
    line-height: var(--atfa-leading-relaxed);
}

@media (max-width: 768px) {
    .hero {
        padding: var(--atfa-space-24) 0 var(--atfa-space-16);
    }
    
    .hero-title {
        font-size: var(--atfa-text-5xl);
    }
    
    .hero-subtitle {
        font-size: var(--atfa-text-lg);
    }
}

/* ==========================================
   SPECIAL ATFA COMPONENTS
   ========================================== */

/* Highlight Text */
.highlight {
    background: linear-gradient(135deg, var(--atfa-secondary) 0%, var(--atfa-secondary-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: var(--atfa-weight-extrabold);
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--atfa-space-8);
    text-align: center;
}

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

.stat-number {
    font-family: var(--atfa-font-heading);
    font-size: var(--atfa-text-5xl);
    font-weight: var(--atfa-weight-black);
    color: var(--atfa-primary);
    display: block;
    margin-bottom: var(--atfa-space-2);
}

.stat-label {
    color: var(--atfa-gray-600);
    font-weight: var(--atfa-weight-semibold);
    font-size: var(--atfa-text-sm);
}

/* Course Grid */
.course-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--atfa-space-6);
}

.course-card {
    background: var(--atfa-white);
    border-radius: var(--atfa-radius-2xl);
    box-shadow: var(--atfa-shadow-base);
    overflow: hidden;
    transition: all var(--atfa-transition-base);
    border: 1px solid var(--atfa-gray-200);
}

.course-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--atfa-shadow-xl);
    border-color: var(--atfa-primary);
}

.course-header {
    padding: var(--atfa-space-6);
    background: var(--atfa-gradient-primary);
    color: var(--atfa-white);
    text-align: center;
}

.course-icon {
    font-size: var(--atfa-text-5xl);
    margin-bottom: var(--atfa-space-4);
}

.course-title {
    font-size: var(--atfa-text-2xl);
    font-weight: var(--atfa-weight-bold);
    margin-bottom: var(--atfa-space-2);
}

.course-subtitle {
    opacity: 0.9;
    font-size: var(--atfa-text-sm);
}

.course-body {
    padding: var(--atfa-space-6);
}

.course-description {
    color: var(--atfa-gray-600);
    margin-bottom: var(--atfa-space-6);
    line-height: var(--atfa-leading-relaxed);
}

/* Team Grid */
.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--atfa-space-8);
}

.team-member {
    background: var(--atfa-white);
    border-radius: var(--atfa-radius-2xl);
    padding: var(--atfa-space-8);
    box-shadow: var(--atfa-shadow-base);
    text-align: center;
    transition: all var(--atfa-transition-base);
}

.team-member:hover {
    transform: translateY(-6px);
    box-shadow: var(--atfa-shadow-lg);
}

.member-photo {
    width: 120px;
    height: 120px;
    border-radius: var(--atfa-radius-full);
    margin: 0 auto var(--atfa-space-6);
    background: var(--atfa-gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--atfa-white);
    font-size: var(--atfa-text-3xl);
    font-weight: var(--atfa-weight-bold);
}

.member-name {
    font-size: var(--atfa-text-2xl);
    font-weight: var(--atfa-weight-bold);
    margin-bottom: var(--atfa-space-2);
}

.member-role {
    color: var(--atfa-primary);
    font-weight: var(--atfa-weight-semibold);
    margin-bottom: var(--atfa-space-4);
}

.member-bio {
    color: var(--atfa-gray-600);
    line-height: var(--atfa-leading-relaxed);
    margin-bottom: var(--atfa-space-6);
}

.member-email {
    background: var(--atfa-gray-100);
    padding: var(--atfa-space-3) var(--atfa-space-4);
    border-radius: var(--atfa-radius-lg);
    font-family: var(--atfa-font-mono);
    color: var(--atfa-gray-700);
    font-size: var(--atfa-text-sm);
    border: 1px solid var(--atfa-gray-300);
}

.member-email:hover {
    background: var(--atfa-gray-200);
    cursor: pointer;
}

/* ==========================================
   ACCESSIBILITY & FOCUS STATES
   ========================================== */

/* Focus visible for better accessibility */
*:focus-visible {
    outline: 2px solid var(--atfa-primary);
    outline-offset: 2px;
}

/* Reduced motion for accessibility */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --atfa-primary: #000000;
        --atfa-secondary: #000000;
        --atfa-gray-600: #000000;
        --atfa-gray-700: #000000;
        --atfa-gray-800: #000000;
    }
    
    .btn {
        border: 2px solid currentColor;
    }
}

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

@media print {
    .navbar,
    .hamburger,
    .btn,
    .footer {
        display: none !important;
    }
    
    body {
        font-size: 12pt;
        line-height: 1.5;
        color: #000000;
        background: #ffffff;
    }
    
    h1, h2, h3, h4, h5, h6 {
        page-break-after: avoid;
        color: #000000;
    }
    
    .card,
    .course-card,
    .team-member {
        box-shadow: none;
        border: 1px solid #000000;
        page-break-inside: avoid;
    }
}