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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: #333;
}

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

.navbar {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
}

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

.nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: bold;
    color: #667eea;
}

.nav-brand a {
    color: inherit;
    text-decoration: none;
}

.icon-brand {
    width: 32px;
    height: 32px;
    color: #667eea;
}

.nav-links {
    display: flex;
    gap: 15px;
    align-items: center;
}

.user-greeting {
    display: flex;
    align-items: center;
    gap: 8px;
    color: #555;
    font-weight: 500;
}

.user-greeting i {
    width: 20px;
    height: 20px;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    color: inherit;
}

.btn i {
    width: 18px;
    height: 18px;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

.btn-outline {
    background: transparent;
    border: 2px solid #667eea;
    color: #667eea;
}

.btn-outline:hover {
    background: #667eea;
    color: white;
}

.btn-large {
    padding: 15px 30px;
    font-size: 1.1rem;
}

.btn-block {
    width: 100%;
    justify-content: center;
}

.btn-white {
    background: white;
    color: #667eea;
}

.btn-white:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.btn-success {
    background: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
    color: white;
}

.btn-success:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(17, 153, 142, 0.4);
}

.btn-danger {
    background: linear-gradient(135deg, #eb3349 0%, #f45c43 100%);
    color: white;
}

.btn-danger:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(235, 51, 73, 0.4);
}

.hero {
    padding: 100px 0;
    text-align: center;
    color: white;
}

.hero-content h1 {
    font-size: 3rem;
    margin-bottom: 20px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
}

.hero-content p {
    font-size: 1.3rem;
    margin-bottom: 40px;
    opacity: 0.95;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

.features {
    background: white;
    padding: 80px 0;
}

.features h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 60px;
    color: #333;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.feature-card {
    text-align: center;
    padding: 30px;
    border-radius: 12px;
    background: #f8f9fa;
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.feature-icon {
    width: 50px;
    height: 50px;
    color: #667eea;
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 1.3rem;
    margin-bottom: 15px;
    color: #333;
}

.feature-card p {
    color: #666;
    line-height: 1.6;
}

.cta {
    padding: 80px 0;
    text-align: center;
    color: white;
}

.cta h2 {
    font-size: 2.5rem;
    margin-bottom: 20px;
}

.cta p {
    font-size: 1.2rem;
    margin-bottom: 40px;
    opacity: 0.95;
}

.footer {
    background: rgba(0, 0, 0, 0.2);
    color: white;
    text-align: center;
    padding: 30px 0;
}

.form-section {
    min-height: calc(100vh - 80px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px 0;
}

.form-container {
    background: white;
    border-radius: 16px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
    padding: 40px;
    width: 100%;
    max-width: 500px;
    margin: 0 20px;
}

.form-header {
    text-align: center;
    margin-bottom: 30px;
}

.form-icon {
    width: 60px;
    height: 60px;
    color: #667eea;
    margin-bottom: 20px;
}

.form-header h2 {
    font-size: 2rem;
    color: #333;
    margin-bottom: 10px;
}

.form-header p {
    color: #666;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 500;
    color: #333;
    margin-bottom: 8px;
}

.form-group label i {
    width: 18px;
    height: 18px;
    color: #667eea;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.error-message {
    background: #fee;
    color: #c33;
    padding: 12px;
    border-radius: 8px;
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.success-message {
    background: #efe;
    color: #3c3;
    padding: 12px;
    border-radius: 8px;
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.form-footer {
    text-align: center;
    margin-top: 20px;
    color: #666;
}

.form-footer a {
    color: #667eea;
    text-decoration: none;
    font-weight: 500;
}

.form-footer a:hover {
    text-decoration: underline;
}

.dashboard-section {
    min-height: calc(100vh - 80px);
    padding: 40px 0;
}

.dashboard-header {
    background: white;
    border-radius: 12px;
    padding: 30px;
    margin-bottom: 30px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.dashboard-header h1 {
    display: flex;
    align-items: center;
    gap: 15px;
    font-size: 2rem;
    color: #333;
}

.dashboard-header h1 i {
    width: 40px;
    height: 40px;
    color: #667eea;
}

.dashboard-actions {
    margin-bottom: 30px;
    display: flex;
    gap: 15px;
    justify-content: center;
}

.section-title {
    background: white;
    border-radius: 12px;
    padding: 20px 30px;
    margin-bottom: 20px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.section-title h2 {
    display: flex;
    align-items: center;
    gap: 15px;
    font-size: 1.5rem;
    color: #333;
}

.section-title h2 i {
    width: 30px;
    height: 30px;
    color: #667eea;
}

.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
}

.instructor-card,
.booking-card,
.profile-card {
    background: white;
    border-radius: 12px;
    padding: 25px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.instructor-card:hover,
.booking-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.card-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 2px solid #f0f0f0;
}

.card-icon {
    width: 30px;
    height: 30px;
    color: #667eea;
}

.card-header h3 {
    font-size: 1.3rem;
    color: #333;
}

.card-body {
    margin-bottom: 20px;
}

.card-body p {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
    color: #555;
}

.card-body p i {
    width: 18px;
    height: 18px;
    color: #667eea;
    flex-shrink: 0;
}

.card-footer {
    padding-top: 15px;
    border-top: 2px solid #f0f0f0;
}

.card-actions {
    display: flex;
    gap: 10px;
    padding-top: 15px;
    border-top: 2px solid #f0f0f0;
}

.status-badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
}

.status-pendente {
    background: #fff3cd;
    color: #856404;
}

.status-confirmado {
    background: #d4edda;
    color: #155724;
}

.status-concluido {
    background: #d1ecf1;
    color: #0c5460;
}

.status-recusado {
    background: #f8d7da;
    color: #721c24;
}

.search-box {
    background: white;
    border-radius: 12px;
    padding: 25px;
    margin-bottom: 30px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.search-input-group {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.search-input-group input {
    flex: 1;
    min-width: 200px;
}

.empty-message {
    background: white;
    border-radius: 12px;
    padding: 40px;
    text-align: center;
    color: #666;
    font-size: 1.1rem;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 2000;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background: white;
    border-radius: 16px;
    padding: 30px;
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 2px solid #f0f0f0;
}

.modal-header h3 {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    color: #333;
}

.modal-header h3 i {
    width: 28px;
    height: 28px;
    color: #667eea;
}

.modal-close {
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all 0.3s ease;
}

.modal-close:hover {
    background: #f0f0f0;
}

.modal-close i {
    width: 24px;
    height: 24px;
    color: #666;
}

@media (max-width: 768px) {
    .hero-content h1 {
        font-size: 2rem;
    }
    
    .hero-content p {
        font-size: 1rem;
    }
    
    .features h2,
    .cta h2 {
        font-size: 1.8rem;
    }
    
    .cards-grid {
        grid-template-columns: 1fr;
    }
    
    .nav-links {
        flex-direction: column;
        gap: 10px;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .search-input-group {
        flex-direction: column;
    }
    
    .search-input-group input {
        width: 100%;
    }
    
    .card-actions {
        flex-direction: column;
    }
}