/* ============================================================
   BASE — reset, tipografia, animações, utilitários
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-size-adjust: 100%;
    scroll-behavior: smooth;
    transition: background-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

body {
    font-family: var(--font);
    font-size: var(--fs-base);
    line-height: 1.6;
    color: var(--text);
    background: var(--bg);
    min-height: 100vh;
    min-height: 100dvh;
    overflow-x: hidden;
    transition: background-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

a { color: var(--primary-text); text-decoration: none; transition: color var(--dur-fast) var(--ease); }
a:hover { color: var(--primary-300); }
[data-theme="light"] a:hover { color: var(--primary-800); }

img, svg, video { max-width: 100%; height: auto; display: block; }
button { font: inherit; color: inherit; cursor: pointer; border: 0; background: none; }
input, textarea, select { font: inherit; color: inherit; outline: 0; }
ul, ol { list-style: none; }
h1, h2, h3, h4 { font-weight: 700; line-height: 1.25; letter-spacing: -.01em; color: var(--text); }
h1 { font-size: var(--fs-3xl); }
h2 { font-size: var(--fs-2xl); }
h3 { font-size: var(--fs-xl); }
h4 { font-size: var(--fs-lg); }
strong { font-weight: 600; }
[hidden] { display: none !important; }
.is-hidden { display: none !important; }

::selection { background: var(--primary-600); color: #fff; }
:focus-visible { outline: 2px solid var(--primary-500); outline-offset: 2px; border-radius: 4px; }

::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: var(--r-full); }
::-webkit-scrollbar-thumb:hover { background: var(--text-soft); }

.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; }
.text-muted { color: var(--text-muted); }
.text-gradient { background: var(--heading-gradient); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }

/* — Animações — */
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes fadeUp { from { opacity: 0; transform: translateY(14px); } to { opacity: 1; transform: none; } }
@keyframes fadeDown { from { opacity: 0; transform: translateY(-10px); } to { opacity: 1; transform: none; } }
@keyframes scaleIn { from { opacity: 0; transform: scale(.94); } to { opacity: 1; transform: scale(1); } }
@keyframes popIn { from { opacity: 0; transform: scale(.6); } to { opacity: 1; transform: scale(1); } }
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: .55; } }
@keyframes float { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-8px); } }
@keyframes shimmer { 0% { background-position: -600px 0; } 100% { background-position: 600px 0; } }
@keyframes shake { 0%, 100% { transform: translateX(0); } 20% { transform: translateX(-6px); } 40% { transform: translateX(6px); } 60% { transform: translateX(-4px); } 80% { transform: translateX(4px); } }
@keyframes glowPulse { 0%, 100% { box-shadow: 0 0 0 0 rgba(var(--primary-rgb), .45); } 60% { box-shadow: 0 0 0 10px rgba(var(--primary-rgb), 0); } }

[data-animate] { animation: fadeUp .5s var(--ease-out) both; }
.anim-fade-up { animation: fadeUp .45s var(--ease-out) both; }
.anim-scale-in { animation: scaleIn .35s var(--ease-out) both; }

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; scroll-behavior: auto !important; }
}