/* Variáveis de Cores e Fontes - Design Premium e Dark Mode */
:root {
    --bg-color: #0b0c10; /* Fundo principal muito escuro */
    --surface-color: rgba(31, 40, 51, 0.6); /* Cor dos cartões (Glassmorphism) */
    --surface-border: rgba(102, 252, 241, 0.15); /* Borda sutil dos cartões */
    
    --primary-color: #66fcf1; /* Ciano vibrante para detalhes importantes */
    --primary-glow: rgba(102, 252, 241, 0.4); /* Brilho primário */
    --secondary-color: #45a29e; /* Tom mais suave de ciano */
    
    --text-main: #ffffff; /* Texto principal branco */
    --text-muted: #c5c6c7; /* Texto secundário acinzentado */
    
    --font-heading: 'Outfit', sans-serif; /* Fonte para títulos */
    --font-body: 'Inter', sans-serif; /* Fonte para o corpo do texto */
    
    --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1); /* Transição suave global */
}

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

/* Estilos do Corpo (Body) */
body {
    background-color: var(--bg-color);
    color: var(--text-main);
    font-family: var(--font-body);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 2rem;
    position: relative;
    overflow-x: hidden;
}

/* Efeito de fundo com gradiente e blur para dar um toque moderno */
.background-effect {
    position: fixed;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 50% 50%, rgba(69, 162, 158, 0.08), transparent 60%);
    z-index: -1;
    pointer-events: none;
}

/* Contêiner Principal */
.container {
    max-width: 1200px;
    width: 100%;
    z-index: 1;
}

/* Cabeçalho da Página */
header {
    text-align: center;
    margin-bottom: 3rem;
    animation: fadeInDown 0.8s ease forwards;
}

header h1 {
    font-family: var(--font-heading);
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    background: linear-gradient(to right, #ffffff, var(--primary-color));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -1px;
}

header p {
    color: var(--text-muted);
    font-size: 1.1rem;
}

/* Grid (Grade) das Calculadoras */
.calculators-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

/* Estilo do Cartão de Calculadora (Glassmorphism) */
.calc-card {
    background: var(--surface-color);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--surface-border);
    border-radius: 20px;
    padding: 2rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    transition: var(--transition);
    animation: fadeInUp 0.8s ease forwards;
    opacity: 0;
    transform: translateY(20px);
}

/* Efeito Hover (ao passar o mouse) no cartão */
.calc-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.4), 0 0 15px var(--primary-glow);
}

/* Cascata de animação para os cartões */
.calc-card:nth-child(1) { animation-delay: 0.1s; }
.calc-card:nth-child(2) { animation-delay: 0.2s; }
.calc-card:nth-child(3) { animation-delay: 0.3s; }

/* Título e Ícone dentro do Cartão */
.calc-card h2 {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.icon {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    width: 32px;
    height: 32px;
    background: rgba(102, 252, 241, 0.1);
    color: var(--primary-color);
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: 700;
}

.description {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
    min-height: 22px;
}

/* Grupo de Inputs (Entradas de texto) */
.input-group {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.input-wrapper {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.input-wrapper label {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Campos de Input numérico e texto */
input[type="number"],
input[type="text"] {
    width: 100%;
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: #fff;
    padding: 0.8rem 1rem;
    border-radius: 10px;
    font-family: var(--font-body);
    font-size: 1.1rem;
    transition: var(--transition);
    outline: none;
}

input[type="number"]:focus,
input[type="text"]:focus {
    border-color: var(--primary-color);
    background: rgba(102, 252, 241, 0.05);
    box-shadow: 0 0 0 3px rgba(102, 252, 241, 0.1);
}

/* Remover as setinhas padrão dos inputs numéricos (Spinner) */
input[type="number"]::-webkit-inner-spin-button,
input[type="number"]::-webkit-outer-spin-button {
    -webkit-appearance: none;
    appearance: none;
    margin: 0;
}
input[type="number"] {
    -moz-appearance: textfield;
    appearance: textfield;
}

/* Grade de Resultados */
.results-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    background: rgba(0, 0, 0, 0.15);
    padding: 1.2rem;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.results-grid.single-result {
    grid-template-columns: 1fr;
}

/* Caixinha individual de resultado */
.result-box {
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
}

.result-box .label {
    font-size: 0.75rem;
    color: var(--secondary-color);
    text-transform: uppercase;
    font-weight: 600;
}

.result-box .value {
    font-size: 1.25rem;
    font-family: var(--font-heading);
    font-weight: 700;
    color: #fff;
    word-break: break-all;
}

/* Destaque para resultados mais importantes */
.result-box.highlight .value {
    color: var(--primary-color);
    font-size: 1.4rem;
}

/* Animações (Keyframes) */
@keyframes fadeInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

/* Responsividade para telas menores */
@media (max-width: 768px) {
    header h1 {
        font-size: 2.2rem;
    }
    .input-group {
        flex-direction: column;
    }
}