/* ==========================================================================
   PRIMITIVES — reset, tipografia, layout e componenti di base (.ds-*)
   Mobile-first: gli stili base sono per telefono, i media query li ampliano.
   ========================================================================== */

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

html {
    -webkit-text-size-adjust: 100%;
    text-size-adjust: 100%;
    scroll-behavior: smooth;
    scroll-padding-top: calc(var(--header-h) + var(--space-4));
}

body {
    margin: 0;
    background: var(--color-bg);
    color: var(--color-text-primary);
    font-family: var(--font-sans);
    font-size: var(--fs-body);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-wrap: break-word;
}

img, svg { display: block; max-width: 100%; }
img { height: auto; }
h1, h2, h3, h4, h5, p, ul, ol, dl, dd, figure, blockquote { margin: 0; }
ul, ol { padding: 0; list-style: none; }
a { color: var(--color-primary); text-underline-offset: 0.2em; }
a:hover { text-decoration-thickness: 2px; }
strong { font-weight: var(--font-weight-semibold); }
button, input, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; }

:focus-visible {
    outline: 3px solid var(--color-focus);
    outline-offset: 2px;
}

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

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

.ds-skip-link {
    position: absolute;
    left: var(--space-4);
    top: -100px;
    z-index: 1000;
    padding: var(--space-3) var(--space-5);
    background: var(--color-primary-dark);
    color: #fff;
    border-radius: var(--radius-sm);
    font-weight: var(--font-weight-semibold);
}
.ds-skip-link:focus { top: var(--space-4); }

/* ---------- Tipografia ---------- */
.ds-h1, .ds-h2, .ds-h3 {
    font-family: var(--font-display);
    font-weight: var(--font-weight-bold);
    line-height: 1.15;
    letter-spacing: -0.02em;
    color: var(--color-primary);
    text-wrap: balance;
}
.ds-h1 { font-size: var(--fs-h1); }
.ds-h2 { font-size: var(--fs-h2); }
.ds-h3 { font-size: var(--fs-h3); line-height: 1.25; letter-spacing: -0.01em; }
.ds-h4 {
    font-size: var(--fs-h4);
    font-weight: var(--font-weight-semibold);
    line-height: 1.35;
    color: var(--color-primary-dark);
}
.ds-lead { font-size: var(--fs-lead); line-height: 1.6; color: var(--color-text-secondary); text-wrap: pretty; }
.ds-body { font-size: var(--fs-body); text-wrap: pretty; }
.ds-body-sm { font-size: var(--fs-body-sm); line-height: 1.6; color: var(--color-text-secondary); }
.ds-body-xs { font-size: var(--fs-caption); line-height: 1.55; }

/* Etichetta di sezione sobria */
.ds-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--fs-caption);
    font-weight: var(--font-weight-semibold);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--color-primary);
}
.ds-eyebrow--accent { color: var(--color-accent); }
.ds-eyebrow--mint { color: var(--color-primary); }

/* ---------- Layout ---------- */
.ds-container {
    width: 100%;
    max-width: var(--container-max);
    margin-inline: auto;
    padding-inline: var(--gutter);
}

.ds-section { padding-block: var(--section-y); }
.ds-section--sm { padding-block: calc(var(--section-y) * 0.6); }
.ds-section--alt { background: var(--color-bg-alt); border-block: var(--border-default); }
.ds-section--ink { background: var(--color-primary-dark); color: var(--color-on-ink); }

.ds-stack { display: flex; flex-direction: column; gap: var(--space-4); }
.ds-stack--xs { gap: var(--space-2); }
.ds-stack--sm { gap: var(--space-3); }
.ds-stack--md { gap: var(--space-6); }
.ds-stack--lg { gap: var(--space-10); }

.ds-row { display: flex; align-items: center; gap: var(--space-3); }
.ds-row--start { align-items: flex-start; }
.ds-row--between { justify-content: space-between; }
.ds-row--wrap { flex-wrap: wrap; }

.ds-grid { display: grid; gap: var(--space-4); grid-template-columns: 1fr; }
.ds-grid--gap-lg { gap: var(--space-6); }

@media (min-width: 640px) {
    .ds-grid--2, .ds-grid--3, .ds-grid--4 { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 1024px) {
    .ds-grid--3 { grid-template-columns: repeat(3, 1fr); }
    .ds-grid--4 { grid-template-columns: repeat(4, 1fr); }
}

.ds-split { display: grid; gap: var(--space-8); grid-template-columns: 1fr; align-items: center; }
@media (min-width: 900px) {
    .ds-split { grid-template-columns: 1fr 1fr; gap: var(--space-12); }
    .ds-split--sidebar { grid-template-columns: 330px 1fr; align-items: start; gap: var(--space-10); }
}

.ds-section-head { display: flex; flex-direction: column; gap: var(--space-3); max-width: 46rem; margin-bottom: var(--space-8); }
.ds-section-head--center { margin-inline: auto; text-align: center; align-items: center; }

/* ---------- Bottoni ---------- */
.ds-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    min-height: var(--tap-min);
    padding: 0.7rem 1.25rem;
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    font-family: var(--font-sans);
    font-size: 1rem;
    font-weight: var(--font-weight-semibold);
    line-height: 1.2;
    text-align: center;
    text-decoration: none;
    transition: background-color 0.15s, color 0.15s, border-color 0.15s;
}
.ds-btn:hover { text-decoration: none; }
.ds-btn--sm { min-height: 44px; padding: 0.5rem 1rem; font-size: 0.9375rem; }
.ds-btn--lg { min-height: 52px; padding: 0.8rem 1.5rem; }
.ds-btn--block { width: 100%; }

.ds-btn--primary { background: var(--color-accent); color: #fff; border-color: var(--color-accent); }
.ds-btn--primary:hover { background: #fff; color: var(--color-accent); border-color: var(--color-accent); }

.ds-btn--accent { background: var(--color-accent); color: #fff; border-color: var(--color-accent); }
.ds-btn--accent:hover { background: #fff; color: var(--color-accent); border-color: var(--color-accent); }

.ds-btn--outline { background: #fff; color: var(--color-accent); border-color: var(--color-accent); }
.ds-btn--outline:hover { background: var(--color-accent); color: #fff; border-color: var(--color-accent); }

.ds-btn--light { background: #fff; color: var(--color-primary-dark); }
.ds-btn--light:hover { background: var(--color-accent); color: #fff; border-color: var(--color-accent); }

/* ---------- Badge ---------- */
.ds-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: 0.25rem 0.6rem;
    border-radius: var(--radius-sm);
    font-size: var(--fs-caption);
    font-weight: var(--font-weight-semibold);
    background: var(--color-primary-subtle);
    color: var(--color-primary);
}
.ds-badge--accent { background: #FEF2F2; color: #B91C1C; }
.ds-badge--mint { background: var(--color-primary-subtle); color: var(--color-primary); }
.ds-badge--ink { background: var(--color-primary-dark); color: #fff; }

/* ---------- Card ---------- */
.ds-card {
    background: var(--color-surface);
    border: var(--border-default);
    border-radius: var(--radius-md);
    padding: var(--space-6);
}
.ds-card--elevated { box-shadow: var(--shadow-sm); }
.ds-card--tone-primary { border-top: 3px solid var(--color-primary); }
.ds-card--tone-accent { border-top: 3px solid var(--color-accent); }

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after {
        animation-duration: 0.001ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.001ms !important;
    }
}