:root {
    --color-background: #101820;
    --color-background-alt: #1A2633;
    --color-primary: #00D1C1;
    --color-primary-dark: #00a699;
    --color-primary-light: #33eadd;
    --color-text-heading: #F0F4F8;
    --color-text-body: #e2e8f0;
    --color-text-muted: #A0AEC0;
    --color-border: #2d3748;
    --color-success: #00D1C1;
    --color-error: #ff6b6b;
    --space-xs: 8px;
    --space-sm: 16px;
    --space-md: 24px;
    --space-lg: 32px;
    --space-xl: 48px;
    --space-2xl: 64px;
    --space-3xl: 80px;
    --container-width: 1160px;
    --container-padding: 24px;
    --font-heading: 'Sora', sans-serif;
    --font-body: 'Inter', sans-serif;
    --text-h1: clamp(2.5rem, 5vw, 3.5rem);
    --text-h2: clamp(1.75rem, 3vw, 2.25rem);
    --text-h3: 1.25rem;
    --text-body: 1.125rem;
}

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

body {
    font-family: var(--font-body);
    font-size: var(--text-body);
    line-height: 1.5;
    color: var(--color-text-body);
    background-color: var(--color-background);
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
    font-family: var(--font-heading);
    color: var(--color-text-heading);
    font-weight: 700;
    line-height: 1.2;
}

h1 { margin-bottom: var(--space-md); font-size: var(--text-h1); }
h2 { margin-bottom: var(--space-sm); font-size: var(--text-h2); }
h3 { margin-bottom: var(--space-xs); font-size: var(--text-h3); }
p { margin-bottom: var(--space-md); max-width: 75ch; }
a { text-decoration: none; color: inherit; }

.container {
    width: 100%;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0 var(--space-md);
    height: 48px;
    border-radius: 12px;
    font-weight: 700;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: none;
    letter-spacing: 0.5px;
}

.btn-primary {
    background-color: var(--color-primary);
    color: #0f172a;
    box-shadow: 0 4px 14px rgba(0, 209, 193, 0.4);
}

.btn-primary:hover {
    background-color: var(--color-primary-light);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 209, 193, 0.6);
}

.btn-outline {
    background-color: transparent;
    border: 2px solid var(--color-primary);
    color: var(--color-primary);
}

.btn-outline:hover {
    background-color: var(--color-primary);
    color: #0f172a;
    box-shadow: 0 4px 14px rgba(0, 209, 193, 0.3);
}

.btn-full {
    width: 100%;
}

.btn-large {
    height: 56px;
    font-size: 1.125rem;
    padding: 0 var(--space-lg);
    gap: 8px;
}

@keyframes fadeUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease-out;
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

.hero-section {
    background-color: var(--color-background);
    padding: var(--space-3xl) 0;
    min-height: 90vh;
    width: 100%;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('images/hero_image.webp');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    opacity: 0.7;
    z-index: 0;
    pointer-events: none;
}

.hero-section::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to right, var(--color-background) 0%, rgba(16, 24, 32, 0.85) 35%, rgba(16, 24, 32, 0.4) 70%, transparent 100%);
    z-index: 1;
    pointer-events: none;
}

.hero-container {
    position: relative;
    z-index: 2;
    width: 100%;
}

.hero-content {
    max-width: 650px;
    animation: fadeUp 1s ease-out;
}

.hero-badge {
    display: inline-block;
    background: rgba(0, 209, 193, 0.15);
    border: 1px solid var(--color-primary);
    color: var(--color-primary);
    padding: 8px 16px;
    border-radius: 50px;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: var(--space-md);
}

.hero-stats {
    display: flex;
    gap: var(--space-lg);
    margin-bottom: var(--space-lg);
}

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

.stat-number {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-primary);
    font-family: var(--font-heading);
    line-height: 1;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-top: 4px;
}

.hero-cta-note {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-top: var(--space-sm);
    margin-bottom: 0;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--color-text-body);
    margin-bottom: var(--space-lg);
}

.authority-section {
    padding: var(--space-3xl) 0;
    background-color: var(--color-background);
}

.authority-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
    align-items: center;
}

.authority-description {
    color: var(--color-text-muted);
    font-size: 1.125rem;
    margin-top: var(--space-sm);
}

.mockup-container {
    display: flex;
    justify-content: center;
    align-items: center;
}

.mockup-image {
    width: 100%;
    max-width: 380px;
    height: auto;
    filter: drop-shadow(0 20px 40px rgba(0, 0, 0, 0.3));
    transition: transform 0.3s ease;
}

.mockup-image:hover {
    transform: scale(1.02);
}

.enemy-section {
    padding: var(--space-3xl) 0;
    background-color: var(--color-background-alt);
}

.section-badge {
    display: inline-block;
    background: rgba(0, 209, 193, 0.1);
    border: 1px solid rgba(0, 209, 193, 0.3);
    color: var(--color-primary);
    padding: 6px 16px;
    border-radius: 50px;
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: var(--space-sm);
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto var(--space-xl);
}

.section-description {
    color: var(--color-text-muted);
    font-size: 1.125rem;
    margin-top: var(--space-sm);
}

.comparison-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
}

.card {
    background-color: var(--color-background-alt);
    padding: var(--space-lg);
    border-radius: 16px;
    border: 1px solid var(--color-border);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.15);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.25);
}

.card h3 {
    text-align: center;
    margin-bottom: var(--space-md);
    padding-bottom: var(--space-sm);
    border-bottom: 2px solid var(--color-border);
}

.card-bad {
    background-color: rgba(255, 107, 107, 0.05);
}

.card-bad h3 {
    color: var(--color-error);
}

.card-good { 
    border-color: var(--color-primary);
    background-color: rgba(0, 209, 193, 0.05);
}

.card-good h3 { 
    color: var(--color-success); 
}

.card ul {
    list-style: none;
}

.card li {
    margin-bottom: var(--space-sm);
    display: flex;
    align-items: flex-start;
    gap: var(--space-sm);
}

.cross { 
    color: var(--color-error); 
    font-weight: bold; 
}

.check { 
    color: var(--color-success); 
    font-weight: bold; 
}

.differentials-section {
    padding: var(--space-3xl) 0;
}

.differentials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-lg);
}

.differential-card {
    background-color: var(--color-background-alt);
    padding: var(--space-lg);
    border-radius: 16px;
    border: 1px solid var(--color-border);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    text-align: center;
}

.differential-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 20px rgba(0, 209, 193, 0.15);
    border-color: var(--color-primary);
}

.diff-icon {
    font-size: 3rem;
    margin-bottom: var(--space-sm);
}

.technical-section {
    padding: var(--space-3xl) 0;
    background: linear-gradient(180deg, rgba(0, 209, 193, 0.1) 0%, var(--color-background) 100%);
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.technical-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.technical-content h2,
.technical-content p {
    color: var(--color-text-heading);
}

.body-large {
    font-size: 1.25rem;
    font-style: italic;
    opacity: 0.9;
}

.checklist-large {
    list-style: none;
    margin-top: var(--space-lg);
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    align-items: center;
}

.checklist-large li {
    background: rgba(0, 209, 193, 0.1);
    border: 1px solid rgba(0, 209, 193, 0.2);
    color: var(--color-primary);
    padding: var(--space-sm) var(--space-lg);
    border-radius: 50px;
    display: flex;
    align-items: center;
    transition: all 0.3s ease;
}

.checklist-large li:hover {
    background: rgba(0, 209, 193, 0.2);
    transform: scale(1.05);
}

.checklist-large li::before {
    content: '✓';
    margin-right: 10px;
    font-weight: bold;
}

.faq-section {
    padding: var(--space-3xl) 0;
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.faq-item {
    background-color: var(--color-background-alt);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    padding: var(--space-md);
    margin-bottom: var(--space-sm);
}

.faq-question {
    font-weight: 600;
    font-family: var(--font-heading);
    color: var(--color-text-heading);
    margin-bottom: var(--space-sm);
    font-size: 1.1rem;
}

.faq-answer {
    color: var(--color-text-body);
    margin-bottom: 0;
    line-height: 1.6;
}

.contact-footer {
    background-color: var(--color-background-alt);
    padding: var(--space-3xl) 0;
    border-top: 1px solid var(--color-border);
}

.contact-footer h2 {
    color: var(--color-text-heading);
    text-align: center;
}

.footer-container {
    max-width: 600px;
}

.contact-form {
    background-color: var(--color-background);
    padding: var(--space-lg);
    border-radius: 16px;
    margin: var(--space-xl) 0;
    border: 1px solid var(--color-border);
}

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

.form-group label {
    display: block;
    margin-bottom: 4px;
    font-weight: 500;
    font-size: 0.9rem;
    color: var(--color-text-body);
}

.form-group input {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    font-family: var(--font-body);
    font-size: 1rem;
    background-color: var(--color-background-alt);
    color: var(--color-text-heading);
    transition: border-color 0.3s, box-shadow 0.3s;
}

.form-group input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 2px rgba(0, 209, 193, 0.2);
}

.whatsapp-direct {
    text-align: center;
}

.whatsapp-direct p {
    margin-bottom: var(--space-sm);
    color: var(--color-text-muted);
}

.whatsapp-direct .btn-outline {
    border-color: var(--color-text-body);
    color: var(--color-text-body);
}

.whatsapp-direct .btn-outline:hover {
    background-color: var(--color-text-body);
    color: var(--color-background);
}

.btn-whatsapp-highlight {
    font-size: 1.2rem;
    padding: 1rem 2.5rem;
    font-weight: 700;
    box-shadow: 0 4px 14px rgba(255, 255, 255, 0.15);
    animation: pulse 2s infinite;
    border-width: 3px;
}

.btn-whatsapp-highlight:hover {
    transform: scale(1.05);
    box-shadow: 0 6px 20px rgba(255, 255, 255, 0.25);
}

@keyframes pulse {
    0%, 100% {
        box-shadow: 0 4px 14px rgba(255, 255, 255, 0.15);
    }
    50% {
        box-shadow: 0 6px 20px rgba(255, 255, 255, 0.3);
    }
}

@media (max-width: 768px) {
    .hero-section {
        min-height: 70vh;
    }

    .hero-section::before {
        width: 100%;
        opacity: 0.08;
        background-position: center;
    }

    .hero-section::after {
        background: linear-gradient(to top, transparent, var(--color-background) 60%);
        width: 100%;
    }

    .hero-stats {
        flex-wrap: wrap;
    }

    .authority-container {
        grid-template-columns: 1fr;
    }

    .mockup-image {
        max-width: 320px;
    }
    
    .comparison-grid {
        grid-template-columns: 1fr;
    }

    .checklist-large {
        align-items: flex-start;
    }
    
    .checklist-large li {
        width: 100%;
    }

    .testimonials-grid {
        grid-template-columns: 1fr;
    }
}