/* ===== MAIN STYLES ===== */

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

/* CSS Custom Properties */
:root {
    /* Vibrant Multi-Color Palette */
    --primary: #7C3AED;
    --primary-light: #F3E8FF;
    --accent-green: #10B981;
    --accent-orange: #F59E0B;
    --accent-pink: #EC4899;
    --accent-cyan: #06B6D4;
    --accent-yellow: #FCD34D;
    --accent-red: #EF4444;
    --accent-purple: #8B5CF6;
    --accent-blue: #3B82F6;
    --accent-lime: #84CC16;
    --accent-indigo: #6366F1;
    
    /* Playful Background Gradients */
    --background: linear-gradient(135deg, #667eea 0%, #764ba2 25%, #f093fb 50%, #f5576c 75%, #4facfe 100%);
    --hero-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
    --tool-card-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --surface: #FFFFFF;
    --surface-gradient: linear-gradient(135deg, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0.05) 100%);
    --border: #E2E8F0;
    --text-primary: #1E293B;
    --text-secondary: #64748B;
    --text-tertiary: #94A3B8;
    --error: #EF4444;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    
    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-xxl: 48px;
    --spacing-xxxl: 64px;
    --spacing-xxxxl: 96px;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(30, 41, 59, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(30, 41, 59, 0.1), 0 2px 4px -2px rgba(30, 41, 59, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(30, 41, 59, 0.1), 0 4px 6px -4px rgba(30, 41, 59, 0.1);
    
    /* Transitions */
    --transition-fast: 0.2s ease-out;
    --transition-normal: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.3s ease-in-out;
}

/* Typography Scale */
.text-display {
    font-size: 48px;
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.025em;
}

.text-h1 {
    font-size: 32px;
    font-weight: 700;
    line-height: 1.3;
    letter-spacing: -0.025em;
}

.text-h2 {
    font-size: 24px;
    font-weight: 600;
    line-height: 1.4;
}

.text-h3 {
    font-size: 18px;
    font-weight: 600;
    line-height: 1.4;
}

.text-large {
    font-size: 18px;
    font-weight: 400;
    line-height: 1.6;
}

.text-body {
    font-size: 16px;
    font-weight: 400;
    line-height: 1.7;
}

.text-small {
    font-size: 14px;
    font-weight: 400;
    line-height: 1.5;
}

/* Base Styles */
html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: 16px;
    line-height: 1.7;
    color: var(--text-primary);
    background: var(--background);
    background-attachment: fixed;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    position: relative;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(circle at 20% 20%, rgba(124, 58, 237, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(236, 72, 153, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 40% 60%, rgba(16, 185, 129, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 60% 40%, rgba(6, 182, 212, 0.1) 0%, transparent 50%);
    pointer-events: none;
    z-index: -1;
}

/* Floating Animation */
@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-10px);
    }
}

@keyframes bounce {
    0%, 20%, 53%, 80%, 100% {
        animation-timing-function: cubic-bezier(0.215, 0.610, 0.355, 1.000);
        transform: translate3d(0, 0, 0);
    }
    40%, 43% {
        animation-timing-function: cubic-bezier(0.755, 0.050, 0.855, 0.060);
        transform: translate3d(0, -30px, 0);
    }
    70% {
        animation-timing-function: cubic-bezier(0.755, 0.050, 0.855, 0.060);
        transform: translate3d(0, -15px, 0);
    }
    90% {
        transform: translate3d(0, -4px, 0);
    }
}

/* Apply animations to specific elements */
.logo-icon {
    animation: bounce 2s infinite;
}

.tool-card:nth-child(even) {
    animation: float 3s ease-in-out infinite;
}

.tool-card:nth-child(odd) {
    animation: float 3s ease-in-out infinite;
    animation-delay: 1s;
}

/* Container */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Links */
a {
    color: var(--primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--text-primary);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: 16px;
    font-weight: 600;
    line-height: 1;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
    min-height: 48px;
    gap: var(--spacing-sm);
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s;
}

.btn:hover::before {
    left: 100%;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-primary {
    background: linear-gradient(45deg, var(--primary), var(--accent-pink));
    color: var(--surface);
    box-shadow: 0 4px 15px rgba(124, 58, 237, 0.3);
}

.btn-primary:hover:not(:disabled) {
    background: linear-gradient(45deg, var(--accent-pink), var(--primary));
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(124, 58, 237, 0.4);
}

.btn-secondary {
    background: linear-gradient(45deg, var(--accent-green), var(--accent-cyan));
    color: var(--surface);
    box-shadow: 0 4px 15px rgba(16, 185, 129, 0.3);
}

.btn-secondary:hover:not(:disabled) {
    background: linear-gradient(45deg, var(--accent-cyan), var(--accent-green));
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(16, 185, 129, 0.4);
}

.btn-outline {
    background: transparent;
    color: var(--primary);
    border: 2px solid;
    border-image: linear-gradient(45deg, var(--primary), var(--accent-pink)) 1;
    box-shadow: 0 2px 10px rgba(124, 58, 237, 0.2);
}

.btn-outline:hover:not(:disabled) {
    background: linear-gradient(45deg, var(--primary), var(--accent-pink));
    color: var(--surface);
    transform: translateY(-1px);
    box-shadow: 0 4px 15px rgba(124, 58, 237, 0.3);
}

.btn:active:not(:disabled) {
    transform: scale(0.98);
}

/* Form Elements */
.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: var(--spacing-md);
    font-size: 16px;
    line-height: 1.5;
    color: var(--text-primary);
    background-color: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-input::placeholder,
.form-textarea::placeholder {
    color: var(--text-tertiary);
}

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

/* Cards */
.card {
    background-color: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
}

.card:hover {
    box-shadow: var(--shadow-md);
}

/* Utility Classes */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.hidden { display: none; }
.visible { display: block; }

.flex { display: flex; }
.inline-flex { display: inline-flex; }
.grid { display: grid; }

.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.items-end { align-items: flex-end; }

.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.justify-end { justify-content: flex-end; }

.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }
.gap-lg { gap: var(--spacing-lg); }

.w-full { width: 100%; }
.h-full { height: 100%; }

.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }

.p-sm { padding: var(--spacing-sm); }
.p-md { padding: var(--spacing-md); }
.p-lg { padding: var(--spacing-lg); }

.rounded { border-radius: var(--radius-md); }
.rounded-lg { border-radius: var(--radius-lg); }

.shadow { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }

/* Loading States */
.loading {
    position: relative;
    pointer-events: none;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid var(--border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.loading-spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid var(--border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

/* Responsive Typography */
@media (max-width: 768px) {
    .text-display {
        font-size: 36px;
    }
    
    .text-h1 {
        font-size: 28px;
    }
    
    .container {
        padding: 0 var(--spacing-sm);
    }
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
    :root {
        --background: #0F172A;
        --surface: #1E293B;
        --border: #334155;
        --text-primary: #F1F5F9;
        --text-secondary: #94A3B8;
        --text-tertiary: #64748B;
    }
}

/* Print Styles */
@media print {
    .header,
    .footer,
    .modal-overlay {
        display: none;
    }
    
    body {
        background: white;
        color: black;
    }
    
    .container {
        max-width: none;
        padding: 0;
    }
}