/* style.css - Design Premium */
:root {
    --bg-color: #0f172a;       /* Azul Escuro Profundo */
    --card-bg: #1e293b;        /* Azul Petróleo */
    --text-color: #e2e8f0;     /* Cinza Claro */
    --accent-color: #3b82f6;   /* Azul Vibrante (Botões) */
    --accent-hover: #2563eb;   /* Azul Escuro (Hover) */
    --success-color: #10b981;  /* Verde Esmeralda */
    --danger-color: #ef4444;   /* Vermelho Suave */
    --gold-color: #f59e0b;     /* Dourado para detalhes */
}

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

body {
    font-family: 'Segoe UI', system-ui, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    display: flex;
    justify-content: center;
    min-height: 100vh;
    padding: 20px;
}

.container {
    background-color: var(--card-bg);
    width: 100%;
    max-width: 550px; /* Largura ideal para não ficar esticado */
    padding: 2rem;
    border-radius: 16px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

h1 {
    text-align: center;
    color: white;
    margin-bottom: 1.5rem;
    font-weight: 700;
    border-bottom: 2px solid var(--accent-color);
    padding-bottom: 10px;
    display: inline-block; /* Centraliza a borda com o texto */
}

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

/* Centralização dos Inputs */
form {
    display: flex;
    flex-direction: column;
    gap: 15px; /* Espaço entre os campos */
}

.input-group {
    display: flex;
    flex-direction: column;
}

label {
    font-size: 0.9rem;
    margin-bottom: 5px;
    color: #94a3b8;
    font-weight: 600;
}

input, select {
    width: 100%;
    padding: 12px 15px;
    background-color: #334155;
    border: 1px solid #475569;
    border-radius: 8px;
    color: white;
    font-size: 1rem;
    transition: all 0.3s ease;
}

input:focus, select:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
    background-color: #405069;
}

/* Campos lado a lado */
.row {
    display: flex;
    gap: 15px;
}
.col {
    flex: 1;
}

/* Botões */
button {
    background-color: var(--accent-color);
    color: white;
    padding: 14px;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: bold;
    cursor: pointer;
    transition: background 0.3s;
    margin-top: 10px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

button:hover {
    background-color: var(--accent-hover);
    transform: translateY(-1px);
}

.btn-pdf {
    background-color: #fff;
    color: var(--bg-color);
    border: 1px solid #ccc;
}
.btn-pdf:hover {
    background-color: #f1f1f1;
}

/* Resultado */
.resultado-box {
    margin-top: 30px;
    padding: 20px;
    border-radius: 12px;
    text-align: center;
    background-color: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255,255,255,0.1);
}

.resultado-box.lucro {
    border-left: 5px solid var(--success-color);
}
.resultado-box.prejuizo {
    border-left: 5px solid var(--danger-color);
}

.big-number {
    font-size: 2.5rem;
    font-weight: 800;
    margin: 10px 0;
    color: white;
}

.lucro .big-number { color: var(--success-color); }
.prejuizo .big-number { color: var(--danger-color); }

small {
    color: #64748b;
    display: block;
    margin-top: 5px;
}