:root {
    --bg: #f4f4f4;
    --text: #333;
    --primary: #4CAF50;
    --primary-hover: #45a049;
    --secondary: #f9f9f9;
    --accent: #e8f5e8;
    --error: #d32f2f;
    --shadow: 0 2px 5px rgba(0,0,0,0.1);
    --border-radius: 8px;
    --border-radius-small: 4px;
    --padding: 1rem;
    --padding-small: 0.5rem;
    --font-family: 'Arial', sans-serif;
    --font-size: 1rem;
    --font-size-large: 2rem;
    --font-size-small: 0.9rem;
}

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

body {
    font-family: var(--font-family);
    line-height: 1.6;
    color: var(--text);
    background-color: var(--bg);
}

header {
    text-align: center;
    padding: var(--padding);
    background-color: var(--primary);
    color: white;
}

header h1 {
    margin-bottom: var(--padding-small);
    font-size: var(--font-size-large);
}

header p {
    font-size: 1.1rem;
}

main {
    padding: var(--padding);
    max-width: 1200px;
    margin: 0 auto;
}

section {
    margin-bottom: 2rem;
}

/* Form */
#trip-form {
    background-color: white;
    padding: 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
}

.input-group {
    margin-bottom: var(--padding);
}

label {
    display: block;
    margin-bottom: var(--padding-small);
    font-weight: bold;
}

input {
    width: 100%;
    padding: var(--padding-small);
    border: 1px solid #ccc;
    border-radius: var(--border-radius-small);
    font-size: var(--font-size);
}

input:focus {
    outline: none;
    border-color: var(--primary);
}

.autocomplete-list {
    list-style: none;
    padding: 0;
    margin: 0;
    border: 1px solid #ccc;
    border-top: none;
    max-height: 150px;
    overflow-y: auto;
    background-color: white;
    position: absolute;
    width: calc(100% - 2px);
    z-index: 1000;
    display: none;
}

.autocomplete-list li {
    padding: var(--padding-small);
    cursor: pointer;
    border-bottom: 1px solid #eee;
}

.autocomplete-list li:hover {
    background-color: var(--secondary);
}

.modal-selection p {
    margin-bottom: var(--padding);
    font-weight: bold;
}

.transport-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(80px, 1fr));
    gap: var(--padding-small);
    justify-items: center;
}

.transport-card {
    background-color: var(--secondary);
    border: 2px solid #ddd;
    border-radius: var(--border-radius);
    padding: var(--padding-small);
    text-align: center;
    cursor: pointer;
    transition: border-color 0.2s, background-color 0.2s;
    font-size: 0.8rem;
}

.transport-card:hover {
    border-color: var(--primary);
}

.transport-card.selected {
    border-color: var(--primary);
    background-color: var(--accent);
}

.transport-card i {
    font-size: 1.5rem;
    color: var(--primary);
    display: block;
    margin-bottom: 0.25rem;
}

button {
    background-color: var(--primary);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius-small);
    cursor: pointer;
    font-size: var(--font-size);
    width: 100%;
    margin-top: var(--padding);
    transition: background-color 0.2s;
}

button:hover, button:focus {
    background-color: var(--primary-hover);
    outline: none;
}

.error {
    color: var(--error);
    margin-top: var(--padding);
    font-weight: bold;
}

/* Resultado */
#result-section h2 {
    text-align: center;
    margin-bottom: var(--padding);
}

#result-content {
    background-color: white;
    padding: 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    border: 2px solid var(--primary);
}

#result-content p {
    margin-bottom: var(--padding-small);
}

/* Comparação */
#comparison-section h2 {
    text-align: center;
    margin-bottom: var(--padding);
}

.comparison-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--padding);
    justify-items: center;
}

.comparison-card {
    background-color: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    padding: var(--padding);
    text-align: center;
}

.comparison-card i {
    font-size: 2rem;
    color: var(--primary);
    margin-bottom: var(--padding-small);
}

.comparison-card h3 {
    font-size: var(--font-size);
    margin-bottom: var(--padding-small);
}

/* Footer */
footer {
    text-align: center;
    padding: var(--padding);
    background-color: var(--text);
    color: white;
    font-size: var(--font-size-small);
}

/* Responsividade */
@media (min-width: 768px) {
    header {
        padding: 2rem;
    }

    header h1 {
        font-size: 2.5rem;
    }

    main {
        padding: 2rem;
    }

    .transport-cards {
        grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
        gap: var(--padding);
    }

    .transport-card {
        font-size: var(--font-size);
    }

    .transport-card i {
        font-size: 2rem;
    }

    button {
        width: auto;
    }

    .comparison-cards {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        gap: 2rem;
    }
}