/* ═══════════════════════════════════════════════════════════
   BASE — Tipografia, Utilitários e Componentes Globais
   COMSAF
═══════════════════════════════════════════════════════════ */

/* Conteúdo principal: evita faixa a mais entre header e hero */
.site-main {
    margin: 0;
    padding: 0;
}

/* ── Container ── */
.container {
    width: 100%;
    max-width: var(--container-xl);
    margin-inline: auto;
    padding-inline: var(--space-6);
}

/* ── Botões ── */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-8);
    font-size: var(--fs-sm);
    font-weight: var(--fw-semibold);
    line-height: 1;
    border-radius: var(--radius-full);
    border: 2px solid transparent;
    cursor: pointer;
    transition: var(--transition-base);
    white-space: nowrap;
    letter-spacing: 0.02em;
    text-transform: uppercase;
}

.btn i {
    font-size: 0.9em;
    transition: transform var(--duration-fast) var(--ease-spring);
}

.btn:hover i {
    transform: translateX(3px);
}

/* Botão Primário */
.btn-primary {
    background: var(--gradient-primary);
    color: var(--white);
    box-shadow: var(--shadow-green);
}

.btn-primary:hover {
    background: var(--gradient-dark);
    box-shadow: 0 12px 40px rgba(67, 160, 71, 0.45);
    transform: translateY(-2px);
}

.btn-primary:active {
    transform: translateY(0);
    box-shadow: var(--shadow-sm);
}

/* Botão Outline */
.btn-outline {
    background: transparent;
    color: var(--green-700);
    border-color: var(--green-600);
}

.btn-outline:hover {
    background: var(--green-600);
    color: var(--white);
    transform: translateY(-2px);
}

/* Botão Outline Verde */
.btn-outline-green {
    background: transparent;
    color: var(--green-700);
    border-color: var(--green-500);
    font-weight: var(--fw-semibold);
}

.btn-outline-green:hover {
    background: var(--green-600);
    color: var(--white);
    border-color: var(--green-600);
    transform: translateY(-2px);
    box-shadow: var(--shadow-green);
}

/* Botão Full Width */
.btn-full {
    width: 100%;
    justify-content: center;
}

/* Botão CTA Primário */
.btn-cta-primary {
    background: var(--white);
    color: var(--green-800);
    border-color: transparent;
    font-weight: var(--fw-bold);
    font-size: var(--fs-base);
    padding: var(--space-4) var(--space-10);
    box-shadow: 0 4px 20px rgba(0,0,0,0.2);
}

.btn-cta-primary:hover {
    background: var(--green-50);
    transform: translateY(-3px);
    box-shadow: 0 8px 32px rgba(0,0,0,0.3);
}

/* Botão CTA Secundário */
.btn-cta-secondary {
    background: transparent;
    color: var(--white);
    border-color: rgba(255,255,255,0.6);
    font-size: var(--fs-base);
    padding: var(--space-4) var(--space-10);
}

.btn-cta-secondary:hover {
    background: rgba(255,255,255,0.15);
    border-color: var(--white);
    transform: translateY(-3px);
}

/* ── Barra de Progresso ── */
.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 0%;
    height: 3px;
    background: var(--gradient-primary);
    z-index: var(--z-top);
    transition: width 50ms linear;
    border-radius: 0 var(--radius-full) var(--radius-full) 0;
}

/* ── Section Headers ── */
.section-header {
    text-align: center;
    margin-bottom: var(--space-12);
}

.section-tag {
    display: inline-block;
    font-size: var(--fs-xs);
    font-weight: var(--fw-bold);
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--green-600);
    background: var(--green-50);
    border: 1px solid var(--green-200);
    padding: var(--space-1) var(--space-4);
    border-radius: var(--radius-full);
    margin-bottom: var(--space-4);
}

.section-tag-light {
    color: var(--green-200);
    background: rgba(255,255,255,0.08);
    border-color: rgba(255,255,255,0.2);
}

.section-title {
    font-size: clamp(var(--fs-2xl), 3.5vw, var(--fs-4xl));
    font-weight: var(--fw-extrabold);
    color: var(--text-primary);
    line-height: var(--lh-tight);
    margin-bottom: var(--space-4);
}

.section-title-light {
    color: var(--white);
}

.text-accent {
    color: var(--green-600);
    position: relative;
}

.text-accent-light {
    color: var(--green-300);
}

.section-desc {
    font-size: var(--fs-md);
    color: var(--text-secondary);
    max-width: 620px;
    margin-inline: auto;
    line-height: var(--lh-relaxed);
}

.section-desc-light {
    color: var(--text-light-muted);
}

/* ── Animações de Reveal ── */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity var(--duration-slower) var(--ease-out),
                transform var(--duration-slower) var(--ease-out);
}

.reveal.is-visible {
    opacity: 1;
    transform: translateY(0);
}

.reveal.delay-1 { transition-delay: 100ms; }
.reveal.delay-2 { transition-delay: 200ms; }
.reveal.delay-3 { transition-delay: 300ms; }
.reveal.delay-4 { transition-delay: 400ms; }

/* ── Carousel Arrows ── */
.carousel-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 48px;
    height: 48px;
    border-radius: var(--radius-full);
    background: var(--white);
    color: var(--green-700);
    border: 2px solid var(--green-200);
    box-shadow: var(--shadow-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--fs-sm);
    cursor: pointer;
    transition: var(--transition-base);
    z-index: 10;
}

.carousel-arrow:hover {
    background: var(--green-600);
    color: var(--white);
    border-color: var(--green-600);
    box-shadow: var(--shadow-green);
    transform: translateY(-50%) scale(1.1);
}

.carousel-prev { left: -24px; }
.carousel-next { right: -24px; }

/* ── Carousel Dots ── */
.carousel-dots {
    display: flex;
    justify-content: center;
    gap: var(--space-2);
    margin-top: var(--space-8);
}

.carousel-dot {
    width: 10px;
    height: 10px;
    border-radius: var(--radius-full);
    background: var(--green-200);
    border: none;
    cursor: pointer;
    transition: var(--transition-base);
}

.carousel-dot.active,
.carousel-dot:hover {
    background: var(--green-600);
    width: 28px;
}

/* ── Back to Top ── */
.back-to-top {
    position: fixed;
    bottom: var(--space-8);
    right: var(--space-8);
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    color: var(--white);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--fs-base);
    box-shadow: var(--shadow-green);
    z-index: var(--z-sticky);
    opacity: 0;
    visibility: hidden;
    transform: translateY(16px);
    transition: var(--transition-base);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(67, 160, 71, 0.5);
}

/* ── Painel Acessibilidade ── */
.a11y-panel {
    position: fixed;
    top: 50%;
    right: 0;
    transform: translateY(-50%) translateX(100%);
    width: 240px;
    background: var(--white);
    border-radius: var(--radius-xl) 0 0 var(--radius-xl);
    box-shadow: var(--shadow-xl);
    z-index: var(--z-modal);
    transition: transform var(--duration-slow) var(--ease-out);
    overflow: hidden;
}

.a11y-panel.open {
    transform: translateY(-50%) translateX(0);
}

.a11y-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-4) var(--space-6);
    background: var(--gradient-primary);
    color: var(--white);
}

.a11y-title {
    font-size: var(--fs-sm);
    font-weight: var(--fw-semibold);
    display: flex;
    align-items: center;
    gap: var(--space-2);
    color: var(--white);
}

.a11y-close {
    color: var(--white);
    font-size: var(--fs-base);
    opacity: 0.8;
    transition: opacity var(--duration-fast) ease;
}

.a11y-close:hover {
    opacity: 1;
}

.a11y-options {
    padding: var(--space-4);
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.a11y-opt {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-4);
    font-size: var(--fs-sm);
    font-weight: var(--fw-medium);
    color: var(--text-primary);
    border-radius: var(--radius-md);
    transition: var(--transition-base);
}

.a11y-opt:hover {
    background: var(--green-50);
    color: var(--green-700);
}

.a11y-opt-reset {
    color: var(--gray-600);
    border-top: var(--border);
    margin-top: var(--space-1);
    padding-top: var(--space-4);
}

/* ── Alto Contraste ── */
body.high-contrast {
    filter: contrast(1.5) brightness(0.9);
}

body.grayscale {
    filter: grayscale(1);
}

/* ── Utilitários ── */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0,0,0,0);
    border: 0;
}

.section-action {
    text-align: center;
    margin-top: var(--space-12);
}