/* ===== RESET MODERNO ===== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-family-primary);
    font-weight: var(--font-weight-regular);
    line-height: var(--line-height-normal);
    color: var(--color-text);
    background-color: var(--color-background);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ===== ESTRUTURA PRINCIPAL ===== */
html, body {
    height: 100%;
}

body {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

main {
    flex: 1;
    width: 100%;
}

/* ===== TIPOGRAFIA ===== */
h1, h2, h3, h4, h5, h6 {
    font-weight: var(--font-weight-bold);
    line-height: var(--line-height-tight);
    margin-bottom: var(--space-4);
}

h1 { font-size: var(--font-size-5xl); }
h2 { font-size: var(--font-size-4xl); }
h3 { font-size: var(--font-size-3xl); }
h4 { font-size: var(--font-size-2xl); }
h5 { font-size: var(--font-size-xl); }
h6 { font-size: var(--font-size-lg); }

p {
    margin-bottom: var(--space-4);
    line-height: var(--line-height-relaxed);
}

/* ===== LINKS ===== */
a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-primary);
}

/* ===== LISTAS ===== */
ul, ol {
    list-style: none;
}

/* ===== IMAGENS ===== */
img, picture, video, canvas, svg {
    display: block;
    max-width: 100%;
    height: auto;
}

/* ===== FORMULÁRIOS ===== */
input, button, textarea, select {
    font: inherit;
    border: none;
    background: none;
}

button {
    cursor: pointer;
}

/* ===== UTILITÁRIOS ===== */
.hidden {
    display: none !important;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.loading {
    text-align: center;
    padding: var(--space-8);
    font-size: var(--font-size-lg);
    color: var(--color-text-light);
}