/* Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-50: #EFF6FF;
    --primary-100: #DBEAFE;
    --primary-200: #BFDBFE;
    --primary-300: #93C5FD;
    --primary-400: #60A5FA;
    --primary-500: #3B82F6;
    --primary-600: #2563EB;
    --primary-700: #1D4ED8;
    --primary-800: #1E40AF;
    --primary-900: #1E3A8A;
    
    --gray-50: #F9FAFB;
    --gray-100: #F3F4F6;
    --gray-200: #E5E7EB;
    --gray-300: #D1D5DB;
    --gray-400: #9CA3AF;
    --gray-500: #6B7280;
    --gray-600: #4B5563;
    --gray-700: #374151;
    --gray-800: #1F2937;
    --gray-900: #111827;
    
    --success: #10B981;
    --warning: #F59E0B;
    --error: #EF4444;
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    
    --transition: all 0.2s ease;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(135deg, #F8FAFC 0%, #EFF6FF 100%);
    min-height: 100vh;
    color: var(--gray-800);
    line-height: 1.6;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Header */
.header {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--gray-200);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 20px;
    font-weight: 700;
    color: var(--gray-900);
}

.nav-links {
    display: flex;
    gap: 8px;
}

.nav-link {
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    text-decoration: none;
    color: var(--gray-600);
    font-weight: 500;
    transition: var(--transition);
}

.nav-link:hover {
    background: var(--gray-100);
    color: var(--gray-900);
}

.nav-link.active {
    background: var(--primary-50);
    color: var(--primary-600);
}

/* Main */
.main {
    padding: 48px 0;
}

.hero {
    text-align: center;
    margin-bottom: 48px;
}

.hero-title {
    font-size: 40px;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.hero-subtitle {
    font-size: 18px;
    color: var(--gray-600);
    max-width: 600px;
    margin: 0 auto;
}

/* Content Grid */
.content-grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 32px;
    align-items: start;
}

/* Cards */
.card {
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    padding: 32px;
    border: 1px solid var(--gray-200);
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--gray-200);
}

.card-title {
    font-size: 20px;
    font-weight: 600;
    color: var(--gray-900);
}

.card-description {
    color: var(--gray-600);
    margin-bottom: 24px;
    font-size: 14px;
}

/* Form Styles */
.form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-label {
    font-size: 14px;
    font-weight: 500;
    color: var(--gray-700);
}

.form-input,
.form-select {
    padding: 12px 16px;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-family: inherit;
    transition: var(--transition);
    background: white;
}

.form-input:focus,
.form-select:focus {
    outline: none;
    border-color: var(--primary-500);
    box-shadow: 0 0 0 3px var(--primary-100);
}

.form-input::placeholder {
    color: var(--gray-400);
}

/* Checkbox Group */
.checkbox-group {
    gap: 8px;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    font-weight: 500;
}

.checkbox-label input[type="checkbox"] {
    display: none;
}

.checkbox-custom {
    width: 20px;
    height: 20px;
    border: 2px solid var(--gray-300);
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    flex-shrink: 0;
}

.checkbox-label input[type="checkbox"]:checked + .checkbox-custom {
    background: var(--primary-600);
    border-color: var(--primary-600);
}

.checkbox-label input[type="checkbox"]:checked + .checkbox-custom::after {
    content: '';
    width: 12px;
    height: 12px;
    background-image: url("data:image/svg+xml,%3Csvg width='12' height='12' viewBox='0 0 12 12' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M10 3L4.5 8.5L2 6' stroke='white' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
    background-size: contain;
}

.checkbox-help {
    font-size: 12px;
    color: var(--gray-500);
    margin-left: 30px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 20px;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 500;
    font-family: inherit;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-600) 0%, var(--primary-700) 100%);
    color: white;
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-700) 0%, var(--primary-800) 100%);
    transform: translateY(-1px);
    box-shadow: 0 6px 16px rgba(37, 99, 235, 0.4);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-secondary {
    background: var(--gray-100);
    color: var(--gray-700);
    border: 1px solid var(--gray-200);
}

.btn-secondary:hover {
    background: var(--gray-200);
}

.btn-sm {
    padding: 8px 12px;
    font-size: 12px;
}

.btn-full {
    width: 100%;
}

.action-buttons {
    display: flex;
    gap: 8px;
}

/* Output Section */
.output-placeholder {
    text-align: center;
    padding: 60px 20px;
    color: var(--gray-500);
}

.output-placeholder svg {
    margin-bottom: 20px;
}

.output-placeholder h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: 8px;
}

.tos-output {
    max-height: 700px;
    overflow-y: auto;
    padding-right: 8px;
}

/* TOS Content Styling */
#tosContent {
    font-size: 14px;
    line-height: 1.8;
    color: var(--gray-800);
}

#tosContent h1 {
    font-size: 24px;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--primary-200);
}

#tosContent h2 {
    font-size: 18px;
    font-weight: 600;
    color: var(--gray-900);
    margin: 24px 0 12px;
    color: var(--primary-700);
}

#tosContent h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--gray-800);
    margin: 16px 0 8px;
}

#tosContent p {
    margin-bottom: 12px;
}

#tosContent ul {
    margin: 8px 0 16px 24px;
}

#tosContent li {
    margin-bottom: 8px;
}

#tosContent strong {
    color: var(--gray-900);
}

#tosContent hr {
    border: none;
    border-top: 1px solid var(--gray-200);
    margin: 24px 0;
}

/* Scrollbar Styling */
.tos-output::-webkit-scrollbar {
    width: 6px;
}

.tos-output::-webkit-scrollbar-track {
    background: var(--gray-100);
    border-radius: 3px;
}

.tos-output::-webkit-scrollbar-thumb {
    background: var(--gray-300);
    border-radius: 3px;
}

.tos-output::-webkit-scrollbar-thumb:hover {
    background: var(--gray-400);
}

/* Disclaimer Card */
.disclaimer-card {
    margin-top: 24px;
    background: linear-gradient(135deg, #FEF3C7 0%, #FDE68A 100%);
    border: 1px solid #F59E0B;
}

.disclaimer-content {
    display: flex;
    gap: 12px;
    align-items: flex-start;
    font-size: 13px;
    color: #78350F;
}

.disclaimer-content strong {
    font-weight: 600;
}

/* Footer */
.footer {
    background: var(--gray-900);
    color: var(--gray-400);
    padding: 32px 0;
    margin-top: 48px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 14px;
}

.footer-links {
    display: flex;
    gap: 24px;
}

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

.footer-links a:hover {
    color: white;
}

/* Toast Notification */
.toast {
    position: fixed;
    bottom: 24px;
    right: 24px;
    background: var(--gray-900);
    color: white;
    padding: 14px 20px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-xl);
    display: flex;
    align-items: center;
    gap: 10px;
    transform: translateY(100px);
    opacity: 0;
    transition: var(--transition);
    z-index: 1000;
}

.toast.show {
    transform: translateY(0);
    opacity: 1;
}

.toast.success {
    background: var(--success);
}

/* Responsive Design */
@media (max-width: 1024px) {
    .content-grid {
        grid-template-columns: 1fr;
    }
    
    .form-section {
        order: 1;
    }
    
    .output-section {
        order: 2;
    }
}

@media (max-width: 768px) {
    .hero-title {
        font-size: 28px;
    }
    
    .hero-subtitle {
        font-size: 16px;
    }
    
    .card {
        padding: 20px;
    }
    
    .card-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }
    
    .action-buttons {
        width: 100%;
        justify-content: flex-start;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 12px;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }
    
    .nav-links {
        display: none;
    }
    
    .tos-output {
        max-height: 500px;
    }
}