/* Modern HubSpot-Inspired Design */
/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* HubSpot-inspired color palette */
    --primary-blue: #ff7a59;
    --primary-blue-dark: #e85d3a;
    --secondary-blue: #1e3a5f;
    --accent-blue: #4c9aff;
    --text-primary: #33475b;
    --text-secondary: #6c757d;
    --text-light: #8a9ba8;
    --background-white: #ffffff;
    --background-light: #f8f9fa;
    --background-gray: #f5f6f7;
    --border-light: #e1e5e9;
    --border-medium: #cbd2d9;
    --shadow-light: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-medium: 0 4px 16px rgba(0, 0, 0, 0.15);
    --shadow-heavy: 0 8px 32px rgba(0, 0, 0, 0.2);
    --radius-small: 6px;
    --radius-medium: 12px;
    --radius-large: 16px;
    --transition-fast: 0.2s ease;
    --transition-medium: 0.3s ease;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--background-light);
    min-height: 100vh;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Header */
.header {
    background: var(--background-white);
    border-bottom: 1px solid var(--border-light);
    padding: 16px 0;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
}

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

.logo {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-blue);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    transition: opacity var(--transition-fast);
}

.logo:hover {
    opacity: 0.8;
}

.logo-icon {
    width: 32px;
    height: 32px;
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-blue-dark));
    border-radius: var(--radius-small);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 700;
}

.nav-links {
    display: flex;
    gap: 32px;
    align-items: center;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition-fast);
}

.nav-link:hover {
    color: var(--primary-blue);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--background-white) 0%, var(--background-light) 100%);
    padding: 40px 0 20px 0;
    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="%23e1e5e9" 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;
    max-width: 800px;
    margin: 0 auto;
}

.hero h1 {
    font-size: 42px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 16px;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 32px;
    line-height: 1.5;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 32px;
    margin-top: 32px;
}

.stat {
    text-align: center;
}

.stat-number {
    font-size: 32px;
    font-weight: 700;
    color: var(--primary-blue);
    display: block;
}

.stat-label {
    font-size: 14px;
    color: var(--text-light);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-top: 4px;
}

/* Form Section */
.form-section {
    background: var(--background-white);
    padding: 20px 0 60px 0;
}

.form-container {
    max-width: 600px;
    margin: 0 auto;
    background: var(--background-white);
    border-radius: var(--radius-large);
    box-shadow: var(--shadow-medium);
    padding: 32px;
    border: 1px solid var(--border-light);
}

.form-title {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-primary);
    text-align: center;
    margin-bottom: 12px;
}

.form-description {
    font-size: 16px;
    color: var(--text-secondary);
    text-align: center;
    margin-bottom: 32px;
    line-height: 1.6;
}

/* Form Styles */
.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
    font-size: 14px;
}

.form-input {
    width: 100%;
    padding: 16px;
    border: 2px solid var(--border-light);
    border-radius: var(--radius-medium);
    font-size: 16px;
    transition: all var(--transition-fast);
    background: var(--background-white);
}

.form-input:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(255, 122, 89, 0.1);
}

.form-input::placeholder {
    color: var(--text-light);
}

/* Category Selection */
.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-top: 16px;
}

.category-card {
    background: var(--background-white);
    border: 2px solid var(--border-light);
    border-radius: var(--radius-medium);
    padding: 20px;
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
}

.category-card:hover {
    border-color: var(--primary-blue);
    transform: translateY(-2px);
    box-shadow: var(--shadow-light);
}

.category-card.selected {
    border-color: var(--primary-blue);
    background: rgba(255, 122, 89, 0.05);
}

.category-card input[type="checkbox"] {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.category-icon {
    font-size: 24px;
    margin-bottom: 12px;
    display: block;
}

.category-name {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 14px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 16px 32px;
    border: none;
    border-radius: var(--radius-medium);
    font-size: 16px;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    gap: 8px;
}

.btn-primary {
    background: var(--primary-blue);
    color: white;
    width: 100%;
    font-size: 18px;
    padding: 20px 32px;
}

.btn-primary:hover {
    background: var(--primary-blue-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-medium);
}

.btn-secondary {
    background: var(--background-white);
    color: var(--text-primary);
    border: 2px solid var(--border-medium);
}

.btn-secondary:hover {
    border-color: var(--primary-blue);
    color: var(--primary-blue);
}

/* Sponsored Products */
.sponsored-section {
    background: var(--background-gray);
    padding: 40px 0;
}

.sponsored-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
    text-align: center;
    margin-bottom: 12px;
}

.sponsored-description {
    font-size: 16px;
    color: var(--text-secondary);
    text-align: center;
    margin-bottom: 32px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.sponsored-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin-top: 32px;
}

.sponsored-card {
    background: var(--background-white);
    border-radius: var(--radius-large);
    box-shadow: var(--shadow-light);
    overflow: hidden;
    transition: all var(--transition-medium);
    border: 1px solid var(--border-light);
}

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

.sponsored-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    background: var(--background-light);
}

.sponsored-content {
    padding: 24px;
}

.sponsored-name {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
    line-height: 1.4;
}

.sponsored-price {
    font-size: 20px;
    font-weight: 700;
    color: var(--primary-blue);
    margin-bottom: 4px;
}

.sponsored-original-price {
    font-size: 14px;
    color: var(--text-light);
    text-decoration: line-through;
    margin-bottom: 12px;
}

.sponsored-discount {
    display: inline-block;
    background: rgba(255, 122, 89, 0.1);
    color: var(--primary-blue);
    padding: 4px 12px;
    border-radius: var(--radius-small);
    font-size: 12px;
    font-weight: 600;
    margin-bottom: 16px;
}

.sponsored-link {
    display: inline-flex;
    align-items: center;
    color: var(--primary-blue);
    text-decoration: none;
    font-weight: 600;
    font-size: 14px;
    gap: 4px;
    transition: color var(--transition-fast);
}

.sponsored-link:hover {
    color: var(--primary-blue-dark);
}

/* Success Message */
.success-message {
    background: linear-gradient(135deg, #10b981, #059669);
    color: white;
    padding: 24px;
    border-radius: var(--radius-medium);
    text-align: center;
    margin-top: 24px;
    box-shadow: var(--shadow-light);
}

.success-icon {
    font-size: 32px;
    margin-bottom: 12px;
    display: block;
}

.success-title {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 8px;
}

.success-description {
    font-size: 14px;
    opacity: 0.9;
}

/* Footer */
.footer {
    background: var(--text-primary);
    color: white;
    padding: 60px 0 40px;
    text-align: center;
}

.footer-content {
    max-width: 800px;
    margin: 0 auto;
}

.footer-logo {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-blue);
    margin-bottom: 16px;
}

.footer-description {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 32px;
    line-height: 1.6;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 32px;
    margin-bottom: 32px;
}

.footer-link {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition-fast);
}

.footer-link:hover {
    color: var(--primary-blue);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 32px;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 0 16px;
    }
    
    .hero {
        padding: 24px 0 16px 0;
    }
    
    .hero h1 {
        font-size: 32px;
    }
    
    .hero-subtitle {
        font-size: 16px;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 16px;
        margin-top: 24px;
    }
    
    .form-section {
        padding: 16px 0 40px 0;
    }
    
    .form-container {
        padding: 24px 20px;
        margin: 0 16px;
    }
    
    .categories-grid {
        grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
        gap: 10px;
    }
    
    .sponsored-section {
        padding: 24px 0;
    }
    
    .sponsored-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    
    .nav-links {
        display: none;
    }
    
    .footer-links {
        flex-direction: column;
        gap: 16px;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 20px 0 12px 0;
    }
    
    .hero h1 {
        font-size: 28px;
    }
    
    .form-container {
        padding: 20px 16px;
    }
    
    .categories-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Loading States */
.loading {
    opacity: 0.6;
    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(--primary-blue);
    border-top: 2px solid transparent;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Accessibility */
.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;
}

/* Focus styles */
*:focus {
    outline: 2px solid var(--primary-blue);
    outline-offset: 2px;
}

/* Smooth scrolling */
html {
    scroll-behavior: smooth;
}