/* Reset e configurações básicas */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #fff;
}

/* Utilitários */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

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

.mb-4 {
    margin-bottom: 1rem;
}

.mb-6 {
    margin-bottom: 1.5rem;
}

.mb-8 {
    margin-bottom: 2rem;
}

.mt-8 {
    margin-top: 2rem;
}

.py-4 {
    padding: 1rem 0;
}

.py-8 {
    padding: 2rem 0;
}

.py-12 {
    padding: 3rem 0;
}

.py-20 {
    padding: 5rem 0;
}

.px-4 {
    padding: 0 1rem;
}

.px-6 {
    padding: 0 1.5rem;
}

.px-8 {
    padding: 0 2rem;
}

.p-6 {
    padding: 1.5rem;
}

.p-8 {
    padding: 2rem;
}

/* Grid */
.grid {
    display: grid;
}

.grid-cols-1 {
    grid-template-columns: repeat(1, 1fr);
}

.grid-cols-2 {
    grid-template-columns: repeat(2, 1fr);
}

.grid-cols-3 {
    grid-template-columns: repeat(3, 1fr);
}

.grid-cols-4 {
    grid-template-columns: repeat(4, 1fr);
}

.gap-4 {
    gap: 1rem;
}

.gap-6 {
    gap: 1.5rem;
}

.gap-8 {
    gap: 2rem;
}

/* Flexbox */
.flex {
    display: flex;
}

.flex-col {
    flex-direction: column;
}

.items-center {
    align-items: center;
}

.justify-center {
    justify-content: center;
}

.justify-between {
    justify-content: space-between;
}

.space-x-4 > * + * {
    margin-left: 1rem;
}

.space-x-8 > * + * {
    margin-left: 2rem;
}

.space-y-4 > * + * {
    margin-top: 1rem;
}

.space-y-6 > * + * {
    margin-top: 1.5rem;
}

.space-y-8 > * + * {
    margin-top: 2rem;
}

/* Tipografia */
.text-sm {
    font-size: 0.875rem;
}

.text-base {
    font-size: 1rem;
}

.text-lg {
    font-size: 1.125rem;
}

.text-xl {
    font-size: 1.25rem;
}

.text-2xl {
    font-size: 1.5rem;
}

.text-3xl {
    font-size: 1.875rem;
}

.text-4xl {
    font-size: 2.25rem;
}

.text-5xl {
    font-size: 3rem;
}

.text-6xl {
    font-size: 3.75rem;
}

.font-medium {
    font-weight: 500;
}

.font-semibold {
    font-weight: 600;
}

.font-bold {
    font-weight: 700;
}

.leading-tight {
    line-height: 1.25;
}

.leading-relaxed {
    line-height: 1.625;
}

/* Cores */
.text-white {
    color: #fff;
}

.text-gray-600 {
    color: #6b7280;
}

.text-gray-700 {
    color: #374151;
}

.text-gray-900 {
    color: #111827;
}

.text-blue-600 {
    color: #2563eb;
}

.text-purple-600 {
    color: #9333ea;
}

.text-green-600 {
    color: #059669;
}

.text-yellow-400 {
    color: #fbbf24;
}

.bg-white {
    background-color: #fff;
}

.bg-gray-50 {
    background-color: #f9fafb;
}

.bg-gray-900 {
    background-color: #111827;
}

.bg-blue-50 {
    background-color: #eff6ff;
}

.bg-purple-50 {
    background-color: #faf5ff;
}

/* Gradientes */
.gradient-text {
    background: linear-gradient(135deg, #3b82f6, #8b5cf6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.btn-gradient {
    background: linear-gradient(135deg, #3b82f6, #8b5cf6);
}

.btn-gradient:hover {
    background: linear-gradient(135deg, #2563eb, #7c3aed);
}

.section-bg {
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
}

/* Header */
.header {
    background: #fff;
    box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 50;
}

.nav-link {
    color: #374151;
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 0.375rem;
    transition: all 0.3s ease;
}

.nav-link:hover,
.nav-link.active {
    color: #2563eb;
    background-color: #eff6ff;
}

/* Botões */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
    font-size: 1rem;
}

.btn-primary {
    background: linear-gradient(135deg, #3b82f6, #8b5cf6);
    color: #fff;
}

.btn-primary:hover {
    background: linear-gradient(135deg, #2563eb, #7c3aed);
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(59, 130, 246, 0.3);
}

.btn-secondary {
    background: #fff;
    color: #374151;
    border: 2px solid #d1d5db;
}

.btn-secondary:hover {
    background: #f9fafb;
    border-color: #9ca3af;
}

.btn-outline {
    background: transparent;
    color: #fff;
    border: 2px solid #fff;
}

.btn-outline:hover {
    background: #fff;
    color: #2563eb;
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

/* Cards */
.card {
    background: #fff;
    border-radius: 0.75rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    overflow: hidden;
}

.card:hover {
    transform: translateY(-8px);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
}

.card-header {
    padding: 1.5rem 1.5rem 1rem;
}

.card-content {
    padding: 0 1.5rem 1.5rem;
}

/* Ícones de matérias */
.subject-icon {
    width: 4rem;
    height: 4rem;
    border-radius: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
    transition: transform 0.3s ease;
}

.subject-icon:hover {
    transform: scale(1.1);
}

.subject-icon.math {
    background: linear-gradient(135deg, #3b82f6, #2563eb);
}

.subject-icon.portuguese {
    background: linear-gradient(135deg, #10b981, #059669);
}

.subject-icon.physics {
    background: linear-gradient(135deg, #8b5cf6, #7c3aed);
}

.subject-icon.chemistry {
    background: linear-gradient(135deg, #ef4444, #dc2626);
}

.subject-icon.english {
    background: linear-gradient(135deg, #f59e0b, #d97706);
}

.subject-icon.history {
    background: linear-gradient(135deg, #6366f1, #4f46e5);
}

/* Features */
.feature-icon {
    width: 4rem;
    height: 4rem;
    border-radius: 1rem;
    background: linear-gradient(135deg, #3b82f6, #8b5cf6);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    transition: transform 0.3s ease;
}

.feature-icon:hover {
    transform: scale(1.1);
}

/* Testimonials */
.testimonial {
    background: #fff;
    border-radius: 0.75rem;
    padding: 1.5rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    transition: box-shadow 0.3s ease;
}

.testimonial:hover {
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

.stars {
    display: flex;
    margin-bottom: 1rem;
}

.star {
    width: 1.25rem;
    height: 1.25rem;
    color: #fbbf24;
    fill: currentColor;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    padding: 5rem 0;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: 3rem;
    align-items: center;
}

.hero-stats {
    display: flex;
    gap: 2rem;
    margin-top: 2rem;
}

.hero-stat {
    text-align: center;
}

.hero-stat-number {
    font-size: 1.875rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.hero-stat-label {
    font-size: 0.875rem;
    color: #6b7280;
}

/* Animações */
.animate-float {
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-20px);
    }
}

/* Footer */
.footer {
    background: #111827;
    color: #fff;
    padding: 3rem 0;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3,
.footer-section h4 {
    margin-bottom: 1rem;
}

.footer-section p {
    color: #d1d5db;
    margin-bottom: 0.5rem;
}

.footer-bottom {
    border-top: 1px solid #374151;
    padding-top: 2rem;
    text-align: center;
    color: #9ca3af;
}

/* Privacy Page */
.privacy-hero {
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    padding: 5rem 0;
}

.privacy-icon {
    width: 5rem;
    height: 5rem;
    border-radius: 1.5rem;
    background: linear-gradient(135deg, #3b82f6, #8b5cf6);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
}

.privacy-section {
    background: #fff;
    border-radius: 0.75rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    padding: 1.5rem;
    margin-bottom: 2rem;
    transition: box-shadow 0.3s ease;
}

.privacy-section:hover {
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

.privacy-section-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.privacy-section-icon {
    width: 3rem;
    height: 3rem;
    border-radius: 0.5rem;
    background: linear-gradient(135deg, #3b82f6, #8b5cf6);
    display: flex;
    align-items: center;
    justify-content: center;
}

.privacy-list {
    list-style: none;
    padding: 0;
}

.privacy-list li {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
}

.privacy-list li::before {
    content: '';
    width: 0.5rem;
    height: 0.5rem;
    background: #2563eb;
    border-radius: 50%;
    margin-top: 0.5rem;
    flex-shrink: 0;
}

.intro-card {
    background: #fff;
    border-radius: 0.75rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    padding: 2rem;
    margin-bottom: 3rem;
    border-left: 4px solid #2563eb;
}

.contact-card {
    background: linear-gradient(135deg, #eff6ff, #faf5ff);
    border-radius: 0.75rem;
    padding: 2rem;
    margin-top: 3rem;
}

.contact-info {
    background: #fff;
    border-radius: 0.5rem;
    padding: 1.5rem;
    border: 1px solid #e5e7eb;
    margin: 1rem 0;
}

.legal-card {
    background: #fff;
    border-radius: 0.75rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    padding: 2rem;
    margin-top: 2rem;
    border-left: 4px solid #8b5cf6;
}

/* Responsividade */
@media (min-width: 768px) {
    .grid-cols-md-2 {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .grid-cols-md-3 {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .hero-content {
        grid-template-columns: 1fr 1fr;
    }
    
    .flex-md-row {
        flex-direction: row;
    }
}

@media (min-width: 1024px) {
    .grid-cols-lg-3 {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .grid-cols-lg-4 {
        grid-template-columns: repeat(4, 1fr);
    }
}

@media (max-width: 767px) {
    .text-4xl {
        font-size: 2rem;
    }
    
    .text-5xl {
        font-size: 2.5rem;
    }
    
    .text-6xl {
        font-size: 3rem;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 1rem;
    }
    
    .btn-lg {
        padding: 0.875rem 1.5rem;
        font-size: 1rem;
    }
}