/**
 * Reset, Atmosfera Tecnológica, Transições Reveal e Acessibilidade — PROSISCO
 */

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

html {
    font-size: 100%;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    color-scheme: dark;
}

body {
    position: relative;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    font-family: var(--font-sans);
    font-size: var(--text-base);
    line-height: var(--leading-normal);
    color: var(--text-primary);
    background-color: var(--bg-primary);
    /* Malha luminosa atmosférica + micro-grid técnico de Smart City */
    background-image:
        radial-gradient(circle at 12% 8%, rgba(37, 99, 235, 0.24) 0%, transparent 42%),
        radial-gradient(circle at 88% 16%, rgba(14, 165, 233, 0.18) 0%, transparent 38%),
        radial-gradient(circle at 50% 62%, rgba(29, 78, 216, 0.12) 0%, transparent 48%),
        linear-gradient(rgba(148, 197, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(148, 197, 255, 0.03) 1px, transparent 1px);
    background-size: 100% 100%, 100% 100%, 100% 100%, 48px 48px, 48px 48px;
    background-attachment: fixed;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

main {
    flex: 1 0 auto;
    position: relative;
    z-index: 1;
}

img,
svg {
    display: block;
    max-width: 100%;
    height: auto;
}

/* Hierarquia Tipográfica Tecnológica */
h1,
h2,
h3,
h4 {
    font-family: var(--font-display);
    color: var(--text-primary);
    font-weight: 700;
    letter-spacing: -0.024em;
    line-height: var(--leading-tight);
}

h1 {
    font-size: var(--text-3xl);
    letter-spacing: -0.03em;
    background: linear-gradient(180deg, #FFFFFF 0%, #CBE0FF 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

h2 {
    font-size: var(--text-2xl);
}

h3 {
    font-size: var(--text-xl);
    line-height: var(--leading-snug);
}

h4 {
    font-size: var(--text-lg);
    line-height: var(--leading-snug);
}

p {
    max-width: var(--measure-reading);
    color: var(--text-secondary);
}

ul,
ol {
    list-style: none;
}

a {
    color: inherit;
    text-decoration: none;
    transition:
        color var(--transition-fast),
        border-color var(--transition-fast),
        background-color var(--transition-fast),
        box-shadow var(--transition-fast),
        transform var(--transition-fast);
}

button,
input,
select,
textarea {
    font: inherit;
    color: inherit;
}

/* Estados de Foco Visíveis (Acessibilidade por Teclado) */
:focus {
    outline: none;
}

:focus-visible {
    outline: 2px solid var(--accent-cyan);
    outline-offset: 3px;
    box-shadow: 0 0 0 4px rgba(56, 189, 248, 0.2);
}

/* Skip Link para Navegação por Teclado */
.skip-link {
    position: absolute;
    top: -100px;
    left: var(--space-4);
    z-index: 1000;
    padding: var(--space-3) var(--space-5);
    background: var(--accent-gradient);
    color: var(--text-on-dark);
    font-size: var(--text-sm);
    font-weight: 600;
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-glow);
    transition: top var(--transition-fast);
}

.skip-link:focus {
    top: var(--space-3);
    outline: 2px solid #FFFFFF;
    outline-offset: 2px;
}

/* Utilitários */
.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;
}

.tabular-nums {
    font-variant-numeric: tabular-nums;
    font-family: var(--font-mono);
}

/* Transições de Entrada Modernas (Scroll Reveal via IntersectionObserver) */
.js-enabled .reveal {
    opacity: 0;
    transform: translateY(24px) scale(0.985);
    transition:
        opacity var(--transition-smooth),
        transform var(--transition-smooth);
    transition-delay: calc(var(--stagger, 0) * 70ms);
    will-change: opacity, transform;
}

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

/* Respeito integral a prefers-reduced-motion */
@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    .js-enabled .reveal {
        opacity: 1 !important;
        transform: none !important;
        transition: none !important;
    }

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}