/* ==========================================================================
   AUREUS — global base: elements, typography, layout primitives, buttons
   ========================================================================== */

body {
    font-family: var(--font-sans);
    font-size: var(--fs-base);
    color: var(--ink);
    background: var(--paper);
    font-feature-settings: "cv05" 1, "cv09" 1, "ss01" 1, "tnum" 0;
}

/* --- headings ---------------------------------------------------------- */
.h-display {
    font-family: var(--font-display);
    font-weight: 500;
    letter-spacing: var(--tracking-tight);
    line-height: 1.06;
}
h1 { font-size: var(--fs-3xl); letter-spacing: var(--tracking-tight); }
h2 { font-size: var(--fs-2xl); letter-spacing: var(--tracking-tight); }
h3 { font-size: var(--fs-xl); }
h4 { font-size: var(--fs-md); }

p { color: var(--ink-soft); }
strong { font-weight: 650; color: var(--ink); }

a {
    color: var(--gold-strong);
    text-underline-offset: 3px;
    transition: color var(--dur-1) var(--ease);
}
a:hover { color: var(--gold); }

small { font-size: var(--fs-sm); }

code, kbd, samp {
    font-family: var(--font-mono);
    font-size: 0.9em;
}

/* --- helpers: text -------------------------------------------------- */
.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 0.5em;
    font-size: var(--fs-xs);
    font-weight: 600;
    letter-spacing: var(--tracking-caps);
    text-transform: uppercase;
    color: var(--gold-strong);
}
.eyebrow::before {
    content: "";
    width: 26px;
    height: 1px;
    background: currentColor;
    opacity: 0.6;
}
.eyebrow.is-centered::before { display: none; }

.lede { font-size: var(--fs-md); color: var(--ink-soft); line-height: 1.6; }
.text-muted { color: var(--muted); }
.text-mono { font-family: var(--font-mono); font-feature-settings: "tnum" 1; }
.text-center { text-align: center; }
.nowrap { white-space: nowrap; }
.tnum { font-variant-numeric: tabular-nums; }

.text-up   { color: var(--success); }
.text-down { color: var(--danger); }

/* --- layout primitives ------------------------------------------- */
.container {
    width: 100%;
    max-width: var(--container);
    margin-inline: auto;
    padding-inline: var(--gutter);
}
.container--wide   { max-width: var(--container-wide); }
.container--narrow { max-width: var(--container-narrow); }

.section { padding-block: clamp(3.5rem, 8vw, 7rem); }
.section--tight { padding-block: clamp(2.5rem, 5vw, 4rem); }
.section--flush-top { padding-top: 0; }

.section-head {
    max-width: 46rem;
    margin-bottom: clamp(2rem, 4vw, 3.25rem);
}
.section-head.is-centered { margin-inline: auto; text-align: center; }
.section-head h2 { margin-top: 0.6rem; }
.section-head p { margin-top: 0.85rem; }

.stack > * + * { margin-top: var(--flow, 1rem); }
.cluster { display: flex; flex-wrap: wrap; gap: var(--gap, 0.75rem); align-items: center; }
.grid { display: grid; gap: var(--gap, 1.5rem); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.divider { border-top: 1px solid var(--line); }

.invert { background: var(--charcoal); color: var(--ink); }
.invert p { color: var(--ink-soft); }

/* --- scroll reveal: subtle, transform+opacity only, no layout shift --- */
.reveal {
    opacity: 0;
    transform: translateY(14px);
    transition: opacity var(--dur-3) var(--ease-out), transform var(--dur-3) var(--ease-out);
}
.reveal.is-visible { opacity: 1; transform: translateY(0); }
@media (prefers-reduced-motion: reduce) {
    .reveal { opacity: 1; transform: none; transition: none; }
}

/* --- skip link --------------------------------------------------- */
.skip-link {
    position: absolute;
    left: 1rem;
    top: -100px;
    z-index: var(--z-toast);
    background: var(--ink);
    color: #fff;
    padding: 0.7rem 1.1rem;
    border-radius: var(--r-sm);
    transition: top var(--dur-2) var(--ease);
}
.skip-link:focus { top: 1rem; }

/* --- buttons --------------------------------------------------- */
.btn {
    --btn-bg: var(--ink);
    --btn-fg: #fff;
    --btn-bd: var(--ink);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.55em;
    padding: 0.85em 1.5em;
    font-size: var(--fs-sm);
    font-weight: 600;
    letter-spacing: 0.02em;
    line-height: 1;
    color: var(--btn-fg);
    background: var(--btn-bg);
    border: 1px solid var(--btn-bd);
    border-radius: var(--r-sm);
    cursor: pointer;
    transition: transform var(--dur-1) var(--ease), box-shadow var(--dur-2) var(--ease),
                background var(--dur-1) var(--ease), border-color var(--dur-1) var(--ease), opacity var(--dur-1);
    white-space: nowrap;
}
.btn:hover { transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn:active { transform: translateY(0); box-shadow: var(--shadow-xs); }
.btn:disabled, .btn[aria-disabled="true"] { opacity: 0.55; pointer-events: none; }
.btn .icon { flex: none; }

.btn--gold {
    --btn-bg: linear-gradient(135deg, #d8b25a 0%, #b98f34 100%);
    --btn-fg: #1c1500;
    --btn-bd: #b98f34;
    box-shadow: var(--shadow-gold);
}
.btn--gold:hover { box-shadow: 0 22px 48px -14px rgba(169, 130, 43, 0.5); }

.btn--ghost {
    --btn-bg: transparent;
    --btn-fg: var(--ink);
    --btn-bd: var(--line-strong);
}
.btn--ghost:hover { --btn-bg: var(--surface-2); box-shadow: var(--shadow-sm); }

.btn--quiet {
    --btn-bg: transparent;
    --btn-fg: var(--ink-soft);
    --btn-bd: transparent;
    padding-inline: 0.6em;
}
.btn--quiet:hover { --btn-fg: var(--ink); box-shadow: none; transform: none; text-decoration: underline; }

.btn--on-dark {
    --btn-bg: rgba(255,255,255,0.06);
    --btn-fg: #fff;
    --btn-bd: rgba(255,255,255,0.28);
}
.btn--on-dark:hover { --btn-bg: rgba(255,255,255,0.12); }

.btn--sm { padding: 0.6em 1em; font-size: var(--fs-xs); }
.btn--lg { padding: 1em 1.9em; font-size: var(--fs-base); }
.btn--block { display: flex; width: 100%; }

.btn--buy  { --btn-bg: var(--success); --btn-bd: var(--success); --btn-fg: #fff; }
.btn--sell { --btn-bg: var(--danger);  --btn-bd: var(--danger);  --btn-fg: #fff; }

.link-arrow {
    display: inline-flex;
    align-items: center;
    gap: 0.4em;
    font-weight: 600;
    font-size: var(--fs-sm);
    color: var(--gold-strong);
}
.link-arrow .icon { transition: transform var(--dur-2) var(--ease); }
.link-arrow:hover .icon { transform: translateX(4px); }

/* --- icon sizing ---------------------------------------------- */
.icon { flex: none; vertical-align: middle; }
.icon--lg { width: 24px; height: 24px; }

/* --- utility ------------------------------------------------- */
.visually-hidden {
    position: absolute !important;
    width: 1px; height: 1px;
    padding: 0; margin: -1px;
    overflow: hidden; clip: rect(0 0 0 0);
    white-space: nowrap; border: 0;
}
[hidden] { display: none !important; }
.u-mt-0 { margin-top: 0 !important; }
.u-mt-2 { margin-top: var(--sp-2); }
.u-mt-4 { margin-top: var(--sp-4); }
.u-mt-6 { margin-top: var(--sp-6); }
.u-mb-4 { margin-bottom: var(--sp-4); }
.u-fill { width: 100%; }
.u-relative { position: relative; }

/* --- print ------------------------------------------------- */
@media print {
    .site-header, .site-footer, .mobile-nav, .toast-stack, .no-print { display: none !important; }
    body { background: #fff; }
}