/*
 * base.css - Estilos base e variáveis de design
 *
 * Paleta de Cores (Gerada Aleatoriamente e Harmônica):
 * Primária: #0077B6 (Azul Institucional)
 * Secundária: #00B4D8 (Ciano Claro)
 * Destaque: #90E0EF (Azul Pastel)
 * Fundo: #F8F9FA (Branco Suave)
 * Texto: #212529 (Preto Quase Total)
 */

:root {
    /* Cores */
    --color-primary: #0077B6;
    --color-secondary: #00B4D8;
    --color-accent: #90E0EF;
    --color-background: #F8F9FA;
    --color-text: #212529;
    --color-text-light: #FFFFFF;
    --color-shadow: rgba(0, 0, 0, 0.1);

    /* Tipografia */
    --font-family-base: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-size-base: 1rem;
    --line-height-base: 1.6;

    /* Espaçamento */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;

    /* Borda e Sombra */
    --border-radius: 0.5rem;
    --box-shadow-sm: 0 1px 3px var(--color-shadow);
    --box-shadow-md: 0 4px 6px var(--color-shadow);
}

/* Reset Básico */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
}

body {
    font-family: var(--font-family-base);
    font-size: var(--font-size-base);
    line-height: var(--line-height-base);
    color: var(--color-text);
    background-color: var(--color-background);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Estilos de Tipografia */
h1, h2, h3, h4, h5, h6 {
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
    color: var(--color-primary);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }

p {
    margin-bottom: var(--spacing-sm);
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: var(--color-secondary);
    text-decoration: underline;
}

/* Layout e Estrutura */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

section {
    padding: var(--spacing-xl) 0;
}

/* Botões */
.btn {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius);
    font-weight: bold;
    text-align: center;
    cursor: pointer;
    transition: background-color 0.3s ease, transform 0.1s ease;
    border: none;
}

.btn-primary {
    background-color: var(--color-primary);
    color: var(--color-text-light);
    box-shadow: var(--box-shadow-md);
}

.btn-primary:hover {
    background-color: var(--color-secondary);
    transform: translateY(-2px);
}

.btn-secondary {
    background-color: transparent;
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
}

.btn-secondary:hover {
    background-color: var(--color-primary);
    color: var(--color-text-light);
}

/* Formulários */
input[type="text"],
input[type="email"],
input[type="tel"],
textarea,
select {
    width: 100%;
    padding: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
    border: 1px solid #ccc;
    border-radius: var(--border-radius);
    font-family: var(--font-family-base);
    font-size: var(--font-size-base);
}

textarea {
    resize: vertical;
}

/* Grid Básico (Flexbox) */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
}

/* Responsividade */
@media (max-width: 768px) {
    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }
    section {
        padding: var(--spacing-lg) 0;
    }
}