:root {
    --color-primary: #191933;
    --color-accent: #00aadd;
    --color-white: #ffffff;
    --color-gray-100: #f8f9fa;
    --color-gray-200: #e9ecef;
    --color-gray-400: #ced4da;
    --color-gray-600: #6c757d;
    --color-error: #dc3545;
    --color-success: #28a745;
    
    --font-family: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    
    --container-width: 1140px;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-xxl: 5rem;
    
    --transition: 0.3s ease;
    --border-radius: 8px;
    --shadow: 0 4px 20px rgba(25, 25, 51, 0.1);
    --shadow-hover: 0 8px 30px rgba(25, 25, 51, 0.15);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-primary);
    background-color: var(--color-white);
    -webkit-font-smoothing: antialiased;
}

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

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    color: var(--color-primary);
}

h1 { font-size: clamp(2rem, 5vw, 3rem); }
h2 { font-size: clamp(1.5rem, 4vw, 2.25rem); margin-bottom: var(--spacing-xl); text-align: center; }
h3 { font-size: 1.125rem; }

a {
    color: var(--color-accent);
    text-decoration: none;
    transition: color var(--transition);
}

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

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: var(--spacing-xxl) 0;
    background: linear-gradient(180deg, var(--color-white) 0%, var(--color-gray-100) 100%);
}

.hero-content {
    max-width: 800px;
}

.logo {
    height: 60px;
    width: auto;
    margin-bottom: var(--spacing-xl);
}

.hero h1 {
    margin-bottom: var(--spacing-lg);
}

.hero-subtitle {
    font-size: 1.125rem;
    color: var(--color-gray-600);
    max-width: 700px;
    margin: 0 auto;
}

/* For Who Section */
.for-who {
    padding: var(--spacing-xxl) 0;
    background-color: var(--color-white);
}

.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.card {
    background: var(--color-white);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    transition: transform var(--transition), box-shadow var(--transition);
}

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

.card-icon {
    width: 48px;
    height: 48px;
    background: var(--color-accent);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
}

.card-icon svg {
    width: 24px;
    height: 24px;
    stroke: var(--color-white);
}

.card h3 {
    margin-bottom: var(--spacing-xs);
    color: var(--color-primary);
}

.card p {
    color: var(--color-gray-600);
    font-size: 0.9375rem;
}

/* How It Works Section */
.how-it-works {
    padding: var(--spacing-xxl) 0;
    background-color: var(--color-gray-100);
}

.flow-diagram {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
    flex-wrap: wrap;
}

.flow-step {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: var(--spacing-md);
    background: var(--color-white);
    border-radius: var(--border-radius);
    min-width: 140px;
    box-shadow: var(--shadow);
}

.flow-step.highlight {
    background: var(--color-primary);
    color: var(--color-white);
}

.flow-step.highlight span,
.flow-step.highlight small {
    color: var(--color-white);
}

.flow-step.highlight .flow-icon {
    background: var(--color-accent);
}

.flow-icon {
    width: 56px;
    height: 56px;
    background: var(--color-gray-100);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-sm);
}

.flow-icon svg {
    width: 28px;
    height: 28px;
    stroke: var(--color-primary);
}

.flow-step.highlight .flow-icon svg {
    stroke: var(--color-white);
}

.flow-step span {
    font-weight: 600;
    font-size: 0.875rem;
}

.flow-step small {
    font-size: 0.75rem;
    color: var(--color-gray-600);
    margin-top: var(--spacing-xs);
}

.flow-arrow {
    font-size: 1.5rem;
    color: var(--color-accent);
    font-weight: 700;
}

.features-list {
    max-width: 700px;
    margin: 0 auto;
}

.feature {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.feature svg {
    width: 24px;
    height: 24px;
    stroke: var(--color-accent);
    flex-shrink: 0;
    margin-top: 2px;
}

.feature strong {
    display: block;
    margin-bottom: var(--spacing-xs);
}

.feature p {
    color: var(--color-gray-600);
    font-size: 0.9375rem;
}

/* Value Section */
.value {
    padding: var(--spacing-xxl) 0;
    background-color: var(--color-white);
}

.value-table {
    max-width: 900px;
    margin: 0 auto;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow);
}

.value-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
}

.value-row.header {
    background: var(--color-primary);
    color: var(--color-white);
    font-weight: 600;
}

.value-row:not(.header):nth-child(even) {
    background: var(--color-gray-100);
}

.value-cell {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--color-gray-200);
}

.value-row.header .value-cell {
    border-bottom: none;
}

.value-cell.problem {
    color: var(--color-gray-600);
}

.value-cell.solution {
    color: var(--color-primary);
    font-weight: 500;
}

@media (max-width: 600px) {
    .value-row {
        grid-template-columns: 1fr;
    }
    
    .value-row.header {
        display: none;
    }
    
    .value-cell.problem {
        padding-bottom: var(--spacing-xs);
        border-bottom: none;
        font-size: 0.875rem;
    }
    
    .value-cell.problem::before {
        content: "Problem: ";
        font-weight: 600;
        color: var(--color-primary);
    }
    
    .value-cell.solution::before {
        content: "→ ";
        color: var(--color-accent);
    }
}

/* Contact Section */
.contact {
    padding: var(--spacing-xxl) 0;
    background: linear-gradient(180deg, var(--color-gray-100) 0%, var(--color-white) 100%);
}

.contact-form {
    max-width: 700px;
    margin: 0 auto;
    background: var(--color-white);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

@media (max-width: 600px) {
    .form-row {
        grid-template-columns: 1fr;
    }
}

.form-group {
    position: relative;
}

.form-group.full-width {
    margin-bottom: var(--spacing-md);
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: var(--spacing-md);
    padding-top: calc(var(--spacing-md) + 8px);
    font-family: var(--font-family);
    font-size: 1rem;
    border: 2px solid var(--color-gray-200);
    border-radius: var(--border-radius);
    background: var(--color-white);
    transition: border-color var(--transition), box-shadow var(--transition);
    appearance: none;
}

.form-group select {
    cursor: pointer;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%236c757d' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    background-size: 18px;
    padding-right: 40px;
}

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

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(0, 170, 221, 0.1);
}

.form-group label {
    position: absolute;
    left: var(--spacing-md);
    top: 50%;
    transform: translateY(-50%);
    font-size: 1rem;
    color: var(--color-gray-600);
    pointer-events: none;
    transition: all var(--transition);
    background: var(--color-white);
    padding: 0 4px;
}

.form-group textarea + label {
    top: var(--spacing-md);
    transform: none;
}

.form-group input:focus + label,
.form-group input:not(:placeholder-shown) + label,
.form-group input.has-value + label,
.form-group textarea:focus + label,
.form-group textarea:not(:placeholder-shown) + label,
.form-group textarea.has-value + label,
.form-group select:focus + label,
.form-group select:valid + label,
.form-group select.has-value + label {
    top: 0;
    transform: translateY(-50%);
    font-size: 0.75rem;
    color: var(--color-accent);
}

.form-group select + label {
    top: 0;
    transform: translateY(-50%);
    font-size: 0.75rem;
    color: var(--color-accent);
}

/* Checkbox */
.checkbox-group {
    margin-bottom: var(--spacing-lg);
}

.checkbox-group input[type="checkbox"] {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.checkbox-group > label {
    position: static;
    transform: none;
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    cursor: pointer;
    font-size: 0.875rem;
    color: var(--color-gray-600);
    line-height: 1.5;
}

.checkbox-custom {
    width: 24px;
    height: 24px;
    min-width: 24px;
    border: 2px solid var(--color-gray-400);
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition);
    background: var(--color-white);
}

.checkbox-custom::after {
    content: '';
    width: 12px;
    height: 6px;
    border: 2px solid var(--color-white);
    border-top: none;
    border-right: none;
    transform: rotate(-45deg) scale(0);
    transition: transform var(--transition);
    margin-top: -2px;
}

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

.checkbox-group input[type="checkbox"]:checked + label .checkbox-custom::after {
    transform: rotate(-45deg) scale(1);
}

.checkbox-group input[type="checkbox"]:focus + label .checkbox-custom {
    box-shadow: 0 0 0 3px rgba(0, 170, 221, 0.2);
}

.checkbox-text a {
    text-decoration: underline;
}

/* Submit Button */
.btn-submit {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--color-primary);
    color: var(--color-white);
    font-family: var(--font-family);
    font-size: 1rem;
    font-weight: 600;
    border: 2px solid var(--color-primary);
    border-radius: var(--border-radius);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    transition: all var(--transition);
}

.btn-submit svg {
    width: 20px;
    height: 20px;
    stroke: currentColor;
}

.btn-submit:hover {
    background: var(--color-white);
    color: var(--color-primary);
}

.btn-submit:active {
    transform: scale(0.98);
}

/* Footer */
.footer {
    background: var(--color-primary);
    color: var(--color-white);
    padding: var(--spacing-xl) 0;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-lg);
}

.footer-company {
    font-size: 0.9375rem;
}

.footer-company strong {
    font-size: 1rem;
    display: block;
    margin-bottom: var(--spacing-xs);
}

.footer-company p {
    opacity: 0.8;
    margin: 0;
}

.footer-contact a {
    color: var(--color-accent);
    font-weight: 500;
    font-size: 1.125rem;
}

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

@media (max-width: 600px) {
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
}

/* Thanks Page */
.thanks-page {
    min-height: calc(100vh - 120px);
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: var(--spacing-xxl) 0;
}

.thanks-content {
    max-width: 500px;
}

.thanks-icon {
    width: 80px;
    height: 80px;
    background: var(--color-success);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-lg);
}

.thanks-icon svg {
    width: 40px;
    height: 40px;
    stroke: var(--color-white);
}

.thanks-content h1 {
    margin-bottom: var(--spacing-md);
}

.thanks-content p {
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-xl);
}

.btn-back {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--color-primary);
    color: var(--color-white);
    font-weight: 600;
    border-radius: var(--border-radius);
    transition: all var(--transition);
}

.btn-back svg {
    width: 20px;
    height: 20px;
    stroke: currentColor;
}

.btn-back:hover {
    background: var(--color-accent);
    color: var(--color-white);
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-content,
.card,
.flow-step,
.feature,
.value-row,
.contact-form {
    animation: fadeInUp 0.6s ease forwards;
}

.card:nth-child(2) { animation-delay: 0.1s; }
.card:nth-child(3) { animation-delay: 0.2s; }
.card:nth-child(4) { animation-delay: 0.3s; }
.card:nth-child(5) { animation-delay: 0.4s; }

/* Responsive adjustments */
@media (max-width: 768px) {
    .hero {
        min-height: auto;
        padding: var(--spacing-xl) 0;
    }
    
    .logo {
        height: 48px;
    }
    
    .flow-diagram {
        flex-direction: column;
    }
    
    .flow-arrow {
        transform: rotate(90deg);
    }
    
    .contact-form {
        padding: var(--spacing-lg);
    }
}