/* ============================================================
   Base reset + tipografia
   ============================================================ */
*,*::before,*::after { box-sizing: border-box; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
    margin: 0;
    font-family: 'Titillium Web', -apple-system, BlinkMacSystemFont, 'Segoe UI', Arial, sans-serif;
    font-size: 15px;
    line-height: 1.6;
    color: var(--fg);
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
    overflow-x: hidden;
}

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

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); text-decoration: underline; }

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.25;
    margin: 1.6em 0 0.6em;
    color: var(--heading);
}
h1 { font-size: clamp(1.75rem, 1.4rem + 1.6vw, 2.5rem); }
h2 { font-size: clamp(1.4rem, 1.2rem + 1vw, 1.875rem); }
h3 { font-size: 1.375rem; }
h4 { font-size: 1.125rem; }

p { margin: 0 0 1em; }

ul, ol { padding-left: 1.4em; }

hr {
    border: 0;
    border-top: 1px solid var(--border);
    margin: 2.5rem 0;
}

blockquote {
    margin: 1.5rem 0;
    padding: 0.75rem 1rem;
    border-left: 4px solid var(--accent);
    background: var(--surface-2);
    border-radius: 0 8px 8px 0;
    color: var(--muted);
    font-style: italic;
}

code {
    font-family: 'JetBrains Mono', 'Fira Code', Consolas, Menlo, monospace;
    font-size: 0.92em;
    background: var(--code-inline-bg);
    color: var(--code-inline-fg);
    padding: 0.12em 0.35em;
    border-radius: 4px;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.25rem 0;
    font-size: 0.95rem;
}
th, td {
    padding: 0.6rem 0.8rem;
    border-bottom: 1px solid var(--border);
    text-align: left;
}
th { background: var(--surface-2); font-weight: 600; }

button { font-family: inherit; cursor: pointer; }

/* Back to top */
#back-to-top {
    position: fixed;
    bottom: 2rem;
    left: calc(var(--sb-width, 320px) + 1.25rem);
    z-index: 500;
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 50%;
    border: 1px solid var(--border);
    background: var(--surface);
    color: var(--fg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    box-shadow: 0 2px 8px rgba(0,0,0,.15);
    opacity: 0;
    pointer-events: none;
    transition: opacity .25s, transform .25s, background .15s;
    transform: translateY(6px);
}
#back-to-top.is-visible {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
}
#back-to-top:hover {
    background: var(--accent);
    color: #fff;
    border-color: var(--accent);
}
@media (max-width: 768px) {
    #back-to-top {
        left: auto;
        right: 1rem;
        bottom: 1.25rem;
    }
}
input, select, textarea { font-family: inherit; }

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

.skip-link {
    position: absolute;
    top: -40px; left: 8px;
    background: var(--accent); color: #fff;
    padding: 6px 10px; border-radius: 6px;
    z-index: 10000;
    transition: top .15s;
}
.skip-link:focus { top: 8px; }

.muted { color: var(--muted); }

.btn {
    display: inline-flex;
    align-items: center;
    gap: .5rem;
    padding: .6rem 1.1rem;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: var(--surface);
    color: var(--fg);
    font-weight: 500;
    transition: background .15s, transform .15s, border-color .15s;
}
.btn:hover { background: var(--surface-2); text-decoration: none; }
.btn-primary {
    background: var(--accent);
    border-color: var(--accent);
    color: #fff;
}
.btn-primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); color: #fff; }

.btn:active { transform: translateY(1px); }

input[type="email"],
input[type="text"],
input[type="password"],
input[type="url"],
textarea,
select {
    width: 100%;
    padding: .6rem .8rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--surface);
    color: var(--fg);
    transition: border-color .15s, box-shadow .15s;
}
input:focus, textarea:focus, select:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-ring);
}

::selection { background: var(--accent); color: #fff; }

.hp { position: absolute; left: -9999px; width: 1px; height: 1px; }