.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    min-height: 48px;
    padding: 12px 18px;
    border-radius: 14px;
    border: 1px solid transparent;
    font-weight: 650;
    transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn:focus-visible {
    outline: 2px solid var(--color-focus-ring);
    outline-offset: 2px;
}
.btn:disabled,
.btn[aria-disabled="true"] {
    color: var(--color-disabled-text);
    cursor: not-allowed;
    opacity: .62;
    pointer-events: none;
    transform: none;
}
.btn-small { min-height: 38px; padding: 9px 13px; font-size: 13px; }
.btn-gold {
    color: var(--color-text-on-accent);
    background: var(--gradient-button-primary);
    box-shadow: var(--shadow-button-primary);
}
.btn-gold:hover { box-shadow: var(--shadow-button-primary-hover); }
.btn-outline {
    color: var(--color-accent-text-strong);
    border-color: var(--color-border);
    background: var(--color-control-surface);
}
.premium-card {
    position: relative;
    overflow: hidden;
    padding: 22px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    background: var(--background-card);
    box-shadow: var(--shadow-card);
}
.premium-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--background-card-accent);
    pointer-events: none;
}
.premium-card > * { position: relative; }
.eyebrow {
    margin: 0 0 10px;
    color: var(--color-accent-text);
    text-transform: uppercase;
    letter-spacing: .18em;
    font-size: 12px;
    font-weight: 700;
}
.card-icon {
    display: inline-grid;
    place-items: center;
    width: 38px;
    height: 38px;
    margin-bottom: 16px;
    border: 1px solid var(--color-border);
    border-radius: 999px;
    color: var(--color-accent-text-strong);
}
.flash {
    width: min(var(--container), calc(100% - 32px));
    margin: 14px auto;
    padding: 14px 16px;
    border-radius: 14px;
    border: 1px solid var(--color-border);
    background: var(--color-surface-accent);
}
.language-switcher {
    display: inline-flex;
    border: 1px solid var(--color-border);
    border-radius: 999px;
    overflow: hidden;
}
.language-switcher a { padding: 7px 9px; color: var(--color-text-secondary); font-size: 12px; }
.language-switcher a.active { color: var(--color-text-on-accent); background: var(--color-accent); }
.theme-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 9px;
    min-width: 44px;
    min-height: 44px;
    padding: 8px 11px;
    border: 1px solid var(--color-border-control);
    border-radius: 14px;
    color: var(--color-accent-text-strong);
    background: var(--color-control-surface);
    box-shadow: inset 0 1px 0 var(--color-border-subtle);
    cursor: pointer;
    appearance: none;
    transition:
        color 180ms ease,
        border-color 180ms ease,
        background-color 180ms ease,
        box-shadow 180ms ease,
        transform 180ms ease;
}
.theme-toggle:hover {
    border-color: var(--color-border-control-hover);
    background: var(--color-control-surface-hover);
    transform: translateY(-1px);
}
.theme-toggle:focus-visible {
    outline: 2px solid var(--color-focus-ring);
    outline-offset: 2px;
}
.theme-toggle[aria-pressed="true"] {
    border-color: var(--color-border-strong);
    background: var(--color-surface-accent-soft);
    box-shadow: var(--shadow-nav-control-active);
}
.theme-toggle__icons {
    position: relative;
    display: inline-grid;
    flex: 0 0 20px;
    width: 20px;
    height: 20px;
    place-items: center;
}
.theme-toggle__icon {
    width: 20px;
    height: 20px;
}
.theme-toggle__icon--moon {
    fill: currentColor;
}
.theme-toggle__icon--sun {
    display: none;
    fill: none;
    stroke: currentColor;
    stroke-linecap: round;
    stroke-linejoin: round;
    stroke-width: 1.8;
}
.theme-toggle[aria-pressed="true"] .theme-toggle__icon--moon {
    display: none;
}
.theme-toggle[aria-pressed="true"] .theme-toggle__icon--sun {
    display: block;
}
.theme-toggle__text {
    color: var(--color-text-secondary);
    font-size: 13px;
    font-weight: 650;
    line-height: 1.2;
    white-space: nowrap;
}
.theme-toggle--compact .theme-toggle__text {
    position: absolute;
    width: 1px;
    height: 1px;
    margin: -1px;
    padding: 0;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
    white-space: nowrap;
}
.theme-toggle.theme-toggle-desktop {
    display: none;
}
.menu-toggle {
    display: inline-grid;
    gap: 4px;
    width: 44px;
    height: 44px;
    place-content: center;
    border: 1px solid var(--color-border);
    border-radius: 12px;
    background: var(--color-control-surface);
    color: var(--color-accent-text-strong);
    cursor: pointer;
}
.menu-toggle span:not(.sr-only) { display: block; width: 18px; height: 2px; background: currentColor; border-radius: 2px; }

@media (forced-colors: active) {
    .theme-toggle {
        border-color: ButtonText;
    }

    .theme-toggle:focus-visible {
        outline-color: Highlight;
    }
}