:root {
    --bg-color: #000000;
    --card-bg: #1c1c21;
    --card-border: #333333;
    --text-main: #ffffff;
    --text-muted: #888888;
    --accent-color: #ffea00; /* Yellow/Neon */
    --accent-hover: #e6d300;
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

/* Typography */
h1.title-text {
    font-size: 20px;
    font-weight: 700;
    text-align: center;
    letter-spacing: 1.5px;
    line-height: 1.4;
    margin-bottom: 40px;
    color: var(--text-muted);
}
.uppercase {
    text-transform: uppercase;
}

/* Screens */
.screen {
    display: none;
    min-height: 100vh;
    width: 100%;
    position: absolute;
    top: 0;
    left: 0;
    animation: fadeIn 0.3s ease-in-out;
}
.screen.active {
    display: block;
}

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

/* Layout */
header {
    padding: 20px;
}
.content {
    padding: 0 20px;
    max-width: 600px;
    margin: 0 auto;
}
.center-content {
    display: flex;
    flex-direction: column;
    justify-content: center;
    min-height: 70vh;
}
footer {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: 20px;
    background: linear-gradient(to top, rgba(0,0,0,1) 50%, rgba(0,0,0,0));
    text-align: center;
    z-index: 10;
}

/* Buttons */
.back-btn {
    background: none;
    border: none;
    color: var(--accent-color);
    font-weight: 700;
    font-size: 14px;
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: 1px;
}
.back-btn.hidden {
    visibility: hidden;
}

.primary-btn {
    background-color: var(--accent-color);
    color: #000;
    font-size: 16px;
    font-weight: 800;
    padding: 16px 40px;
    border: none;
    border-radius: 30px;
    width: 100%;
    max-width: 300px;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(255, 234, 0, 0.3);
    transition: all 0.2s;
}
.primary-btn:active {
    transform: scale(0.98);
}

/* Tela 1: Opções de Veículo */
.vehicle-options {
    display: flex;
    flex-direction: column;
    gap: 15px;
    align-items: center;
}
@media (min-width: 400px) {
    .vehicle-options {
        flex-direction: row;
        justify-content: center;
        flex-wrap: wrap;
    }
}
.option-card {
    background-color: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    width: 140px;
    height: 120px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s;
    position: relative;
}
.option-card span {
    font-weight: 600;
    font-size: 16px;
    color: var(--text-muted);
}
.option-card .dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background-color: transparent;
    position: absolute;
    top: 15px;
    left: 15px;
}
.option-card.active {
    border-color: var(--accent-color);
    box-shadow: 0 0 10px rgba(255, 234, 0, 0.1);
}
.option-card.active span {
    color: var(--accent-color);
}
.option-card.active .dot {
    background-color: var(--accent-color);
}

/* Tela 2: Formulário */
.form-group {
    margin-bottom: 20px;
}
.form-group label {
    display: block;
    color: var(--accent-color);
    font-weight: 600;
    font-size: 14px;
    margin-bottom: 8px;
}
.form-group input, .form-group select {
    width: 100%;
    background-color: var(--card-bg);
    border: 1px solid var(--card-border);
    color: var(--text-main);
    padding: 15px;
    border-radius: 8px;
    font-size: 16px;
    outline: none;
    transition: border-color 0.2s;
}
.form-group input:focus, .form-group select:focus {
    border-color: var(--accent-color);
}
.form-group input::placeholder {
    color: #444;
}

/* Tooltip (interrogação) */
.tooltip {
    display: inline-block;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    border: 1px solid var(--accent-color);
    text-align: center;
    line-height: 14px;
    font-size: 12px;
    cursor: help;
    margin-left: 5px;
}

/* Tela 3: Resultados */
.summary-box {
    background-color: var(--card-bg);
    border: 1px solid var(--accent-color);
    border-radius: 12px;
    padding: 20px;
    font-size: 15px;
    line-height: 1.5;
    margin-bottom: 20px;
}
.highlight {
    color: var(--accent-color);
    font-weight: 700;
}

.totals-grid {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-bottom: 30px;
}
.card-total {
    background-color: var(--card-bg);
    border-radius: 12px;
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 15px;
}
.icon-circle {
    width: 40px;
    height: 40px;
    background-color: var(--accent-color);
    border-radius: 50%;
    color: #000;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 20px;
}
.card-info {
    display: flex;
    flex-direction: column;
}
.card-info .label {
    color: var(--text-muted);
    font-size: 12px;
    text-transform: uppercase;
    font-weight: 600;
    letter-spacing: 0.5px;
}
.card-info .value {
    color: var(--accent-color);
    font-size: 22px;
    font-weight: 700;
}

.section-title {
    font-size: 16px;
    text-align: center;
    color: var(--text-muted);
    letter-spacing: 1.5px;
    margin: 30px 0 20px 0;
}

/* Categorias de Custo */
.category-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.category-card {
    background-color: var(--card-bg);
    border-radius: 12px;
    padding: 15px 20px;
    display: flex;
    align-items: center;
    gap: 15px;
}
.category-info {
    display: flex;
    flex-direction: column;
}
.category-info .label {
    color: #fff;
    font-size: 15px;
    font-weight: 600;
}
.category-info .value {
    color: var(--accent-color);
    font-size: 18px;
    font-weight: 700;
    margin-top: 4px;
}
.category-info .sub-value {
    color: var(--accent-color);
    font-size: 12px;
    font-weight: 600;
}

/* Gráfico */
.chart-container {
    background-color: var(--card-bg);
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 20px;
    width: 100%;
}