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

:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --background-color: #ecf0f1;
    --danger-color: #e74c3c;
    --success-color: #2ecc71;
    --text-color: #2c3e50;
    --light-text: #7f8c8d;
    --white: #ffffff;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    --border-radius: 12px;
    --paper-texture: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="100" height="100" viewBox="0 0 100 100"><defs><pattern id="paper" x="0" y="0" width="100" height="100" patternUnits="userSpaceOnUse"><rect width="100" height="100" fill="%23ecf0f1"/><circle cx="20" cy="20" r="1" fill="%23bdc3c7" opacity="0.3"/><circle cx="80" cy="40" r="1" fill="%23bdc3c7" opacity="0.2"/><circle cx="40" cy="80" r="1" fill="%23bdc3c7" opacity="0.3"/></pattern></defs><rect width="100" height="100" fill="url(%23paper)"/></svg>');
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: var(--background-color);
    background-image: var(--paper-texture);
    color: var(--text-color);
    line-height: 1.6;
    padding-bottom: 80px;
}

/* Header */
header {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
    padding: 1rem;
    text-align: center;
    box-shadow: var(--shadow);
    position: relative;
    overflow: hidden;
}

header::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 1px, transparent 1px);
    background-size: 20px 20px;
    animation: float 20s infinite linear;
}

@keyframes float {
    0% { transform: translate(-50%, -50%) rotate(0deg); }
    100% { transform: translate(-50%, -50%) rotate(360deg); }
}

.header-content {
    position: relative;
    z-index: 2;
}

.header-content h1 {
    font-size: 1.8rem;
    margin-bottom: 0.5rem;
    font-weight: 700;
}

.header-content p {
    opacity: 0.9;
    font-size: 0.9rem;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem;
}

/* Seções */
.section {
    display: none;
    min-height: calc(100vh - 200px);
    padding: 1rem 0;
}

.section.active {
    display: block;
}

.section h2 {
    text-align: center;
    margin-bottom: 2rem;
    color: var(--primary-color);
    font-size: 1.5rem;
}

/* Formulários */
.route-form, .carpool-form {
    background: var(--white);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    margin-bottom: 2rem;
}

.input-group {
    margin-bottom: 1rem;
    position: relative;
}

.input-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--primary-color);
}

.input-group input,
.input-group select {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid #ddd;
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.input-group input:focus,
.input-group select:focus {
    outline: none;
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

.location-btn {
    position: absolute;
    right: 8px;
    top: 32px;
    background: var(--secondary-color);
    color: var(--white);
    border: none;
    border-radius: 6px;
    padding: 0.5rem;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.location-btn:hover {
    background: #2980b9;
}

/* Opções de Transporte */
.transport-options {
    margin: 1.5rem 0;
}

.transport-options h3 {
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.transport-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 1rem;
}

.transport-option {
    cursor: pointer;
}

.transport-option input {
    display: none;
}

.option-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 1rem;
    background: var(--white);
    border: 2px solid #ddd;
    border-radius: var(--border-radius);
    transition: all 0.3s ease;
    text-align: center;
}

.option-card i {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--secondary-color);
}

.transport-option input:checked + .option-card {
    border-color: var(--success-color);
    background: rgba(46, 204, 113, 0.1);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

/* Botões */
.btn-primary {
    width: 100%;
    padding: 0.875rem 1.5rem;
    background: linear-gradient(135deg, var(--success-color), #27ae60);
    color: var(--white);
    border: none;
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.btn-primary:hover {
    background: linear-gradient(135deg, #27ae60, var(--success-color));
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(46, 204, 113, 0.3);
}

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

/* Loading */
.loading {
    text-align: center;
    padding: 2rem;
    background: var(--white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
}

.loading i {
    font-size: 2rem;
    color: var(--secondary-color);
    margin-bottom: 1rem;
}

.hidden {
    display: none !important;
}

/* Resultados das Rotas */
.route-results {
    background: var(--white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    padding: 1.5rem;
    margin-top: 2rem;
}

.route-card {
    background: #f8f9fa;
    border-radius: 8px;
    padding: 1rem;
    margin-bottom: 1rem;
    border-left: 4px solid var(--success-color);
    transition: transform 0.3s ease;
}

.route-card:hover {
    transform: translateX(5px);
}

.route-card.high-carbon {
    border-left-color: var(--danger-color);
}

.route-card.medium-carbon {
    border-left-color: #f39c12;
}

.route-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.transport-type {
    font-weight: 600;
    color: var(--primary-color);
}

.carbon-badge {
    background: var(--success-color);
    color: var(--white);
    padding: 0.25rem 0.5rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
}

.carbon-badge.high {
    background: var(--danger-color);
}

.carbon-badge.medium {
    background: #f39c12;
}

.route-details {
    font-size: 0.9rem;
    color: var(--light-text);
}

/* Mapa */
#map-container {
    background: var(--white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    overflow: hidden;
    margin-bottom: 2rem;
}

#map-placeholder {
    height: 300px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--light-text);
    text-align: center;
}

#map-placeholder i {
    font-size: 3rem;
    margin-bottom: 1rem;
    color: var(--secondary-color);
}

/* Caronas */
.carpooling-tabs {
    display: flex;
    background: var(--white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    margin-bottom: 2rem;
    overflow: hidden;
}

.tab-btn {
    flex: 1;
    padding: 1rem;
    background: transparent;
    border: none;
    font-size: 1rem;
    font-weight: 600;
    color: var(--light-text);
    cursor: pointer;
    transition: all 0.3s ease;
}

.tab-btn.active {
    background: var(--secondary-color);
    color: var(--white);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

.carpool-results {
    background: var(--white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    padding: 1.5rem;
    margin-top: 2rem;
}

.carpool-card {
    background: #f8f9fa;
    border-radius: 8px;
    padding: 1rem;
    margin-bottom: 1rem;
    border-left: 4px solid var(--secondary-color);
}

.carpool-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.carpool-route {
    font-weight: 600;
    color: var(--primary-color);
}

.seats-available {
    background: var(--success-color);
    color: var(--white);
    padding: 0.25rem 0.5rem;
    border-radius: 20px;
    font-size: 0.8rem;
}

.carpool-details {
    font-size: 0.9rem;
    color: var(--light-text);
}

/* Perfil */
.profile-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    padding: 1.5rem;
    text-align: center;
    transition: transform 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-5px);
}

.stat-card i {
    font-size: 2rem;
    color: var(--success-color);
    margin-bottom: 1rem;
}

.stat-number {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--light-text);
}

.profile-form {
    background: var(--white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    padding: 1.5rem;
}

.checkbox-group {
    margin: 1rem 0;
}

.checkbox-group label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    font-weight: 600;
    color: var(--primary-color);
}

/* FAQ */
.faq-container {
    background: var(--white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    overflow: hidden;
}

.faq-item {
    border-bottom: 1px solid #eee;
}

.faq-item:last-child {
    border-bottom: none;
}

.faq-question {
    width: 100%;
    padding: 1.5rem;
    background: transparent;
    border: none;
    text-align: left;
    font-size: 1rem;
    font-weight: 600;
    color: var(--primary-color);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background-color 0.3s ease;
}

.faq-question:hover {
    background: rgba(52, 152, 219, 0.05);
}

.faq-icon {
    font-size: 1.2rem;
    color: var(--secondary-color);
    transition: transform 0.3s ease;
}

.faq-question[aria-expanded="true"] .faq-icon {
    transform: rotate(45deg);
}

.faq-answer {
    padding: 0 1.5rem 1.5rem;
    color: var(--light-text);
    line-height: 1.6;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Navegação Inferior */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--white);
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
    display: flex;
    padding: 0.5rem 0;
    z-index: 1000;
}

.nav-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-decoration: none;
    color: var(--light-text);
    padding: 0.5rem;
    transition: all 0.3s ease;
    border-radius: 8px;
    margin: 0 0.25rem;
}

.nav-item:hover {
    background: rgba(52, 152, 219, 0.1);
}

.nav-item.active {
    color: var(--secondary-color);
    background: rgba(52, 152, 219, 0.1);
}

.nav-item i {
    font-size: 1.2rem;
    margin-bottom: 0.25rem;
}

.nav-item span {
    font-size: 0.7rem;
    font-weight: 600;
}

/* Footer */
footer {
    text-align: center;
    padding: 2rem 1rem 1rem;
    color: var(--light-text);
    font-size: 0.9rem;
    margin-top: 3rem;
}

/* Responsividade */
@media (min-width: 768px) {
    .header-content h1 {
        font-size: 2.5rem;
    }
    
    .header-content p {
        font-size: 1.1rem;
    }
    
    .section h2 {
        font-size: 2rem;
    }
    
    .transport-grid {
        grid-template-columns: repeat(4, 1fr);
    }
    
    .profile-stats {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .carpooling-tabs {
        max-width: 400px;
        margin: 0 auto 2rem;
    }
    
    .bottom-nav {
        max-width: 600px;
        left: 50%;
        transform: translateX(-50%);
        border-radius: var(--border-radius) var(--border-radius) 0 0;
    }
    
    body {
        padding-bottom: 100px;
    }
}

@media (min-width: 1024px) {
    .container {
        padding: 2rem;
    }
    
    .route-form, .carpool-form, .profile-form {
        padding: 2rem;
    }
    
    .transport-grid {
        max-width: 600px;
        margin: 0 auto;
    }
}

/* Animações */
.fade-in {
    animation: fadeIn 0.5s ease;
}

.slide-up {
    animation: slideUp 0.3s ease;
}

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

/* Estados de erro */
.error {
    color: var(--danger-color);
    font-size: 0.9rem;
    margin-top: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.success {
    color: var(--success-color);
    font-size: 0.9rem;
    margin-top: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* Melhorias de acessibilidade */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Focus styles */
button:focus,
input:focus,
select:focus,
.nav-item:focus {
    outline: 2px solid var(--secondary-color);
    outline-offset: 2px;
}