/* Base — Tipografia e utilitários */

body {
    font-family: var(--font-body);
    font-size: var(--font-body-size);
    color: var(--color-text);
    background-color: var(--color-white);
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    color: var(--color-heading);
    letter-spacing: -0.02em;
}

h1 { font-size: var(--font-h1); font-weight: 700; }
h2 { font-size: var(--font-h2); font-weight: 700; }
h3 { font-size: var(--font-h3); font-weight: 600; }

p { color: var(--color-text); }

strong { font-weight: 600; color: var(--color-heading); }

a { color: var(--color-blue-steel); transition: color var(--transition); }
a:hover { color: var(--color-red); }

::selection { background: var(--color-red); color: var(--color-white); }

:focus-visible {
    outline: 3px solid var(--color-blue-light);
    outline-offset: 3px;
    border-radius: var(--radius-sm);
}

/* Container */
.container {
    width: 100%;
    max-width: var(--container);
    margin-inline: auto;
    padding-inline: clamp(1rem, 4vw, 2rem);
}

.container-narrow {
    max-width: var(--container-narrow);
}

/* Seções */
.section {
    padding-block: clamp(4rem, 10vw, 8rem);
    position: relative;
}

.section--gray { background: var(--color-gray-bg); }
.section--white { background: var(--color-white); }
.section--dark {
    background: linear-gradient(135deg, var(--color-blue-steel) 0%, var(--color-blue-steel-dark) 100%);
    color: var(--color-white);
}
.section--dark h1,
.section--dark h2,
.section--dark h3 { color: var(--color-white); }

/* Cabeçalho de seção (eyebrow + título + lead) */
.section-head {
    text-align: center;
    margin-bottom: clamp(2rem, 5vw, 4rem);
}

.section-head__eyebrow {
    display: inline-block;
    font-family: var(--font-heading);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-red);
    text-transform: uppercase;
    letter-spacing: 0.12em;
    margin-bottom: var(--space-3);
}

.section-head__title {
    margin-bottom: var(--space-4);
}

.section-head__lead {
    max-width: 60ch;
    margin-inline: auto;
    color: var(--color-text-muted);
}

/* Botões */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-4) var(--space-8);
    border-radius: var(--radius-full);
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 1rem;
    letter-spacing: -0.01em;
    cursor: pointer;
    transition: all var(--transition);
    white-space: nowrap;
    line-height: 1;
    border: 2px solid transparent;
}

.btn--primary {
    background: var(--color-red);
    color: var(--color-white);
    box-shadow: var(--shadow-red);
}
.btn--primary:hover {
    background: var(--color-red-dark);
    color: var(--color-white);
    transform: translateY(-2px);
    box-shadow: 0 16px 36px rgba(89, 2, 2, 0.35);
}

.btn--secondary {
    background: transparent;
    color: var(--color-blue-steel);
    border-color: var(--color-blue-steel);
}
.btn--secondary:hover {
    background: var(--color-blue-steel);
    color: var(--color-white);
    transform: translateY(-2px);
}

.btn--ghost-white {
    background: transparent;
    color: var(--color-white);
    border-color: rgba(255, 255, 255, 0.4);
}
.btn--ghost-white:hover {
    background: var(--color-white);
    color: var(--color-blue-steel);
    border-color: var(--color-white);
}

.btn--lg {
    padding: var(--space-6) var(--space-12);
    font-size: 1.125rem;
}

.btn--sm {
    padding: var(--space-3) var(--space-6);
    font-size: 0.875rem;
}

.btn svg { width: 1.1em; height: 1.1em; }

.btn[aria-disabled="true"],
.btn.is-disabled {
    opacity: 0.62;
    cursor: not-allowed;
    box-shadow: none;
}

.btn[aria-disabled="true"]:hover,
.btn.is-disabled:hover {
    transform: none;
    box-shadow: none;
}

/* Animações on-scroll */
.reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 600ms cubic-bezier(0.4, 0, 0.2, 1),
                transform 600ms cubic-bezier(0.4, 0, 0.2, 1);
}
.reveal.is-visible {
    opacity: 1;
    transform: translateY(0);
}
.reveal[data-delay="100"] { transition-delay: 100ms; }
.reveal[data-delay="200"] { transition-delay: 200ms; }
.reveal[data-delay="300"] { transition-delay: 300ms; }
.reveal[data-delay="400"] { transition-delay: 400ms; }

/* Sr-only (acessibilidade) */
.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;
}

/* Skip link */
.skip-link {
    position: absolute;
    top: -100px;
    left: var(--space-4);
    background: var(--color-blue-steel);
    color: var(--color-white);
    padding: var(--space-3) var(--space-6);
    border-radius: var(--radius-sm);
    z-index: 1000;
    transition: top var(--transition);
}
.skip-link:focus { top: var(--space-4); color: var(--color-white); }