/* =====================================================================
 * buttons.css — canonical button system shared across the portal + tools.
 *
 * Variants: .btn (base), .btn-primary, .btn-secondary, .btn-ghost,
 * .btn-danger. Sizes: default, .btn-sm, .btn-lg.
 *
 * Tools that previously declared their own .btn rules can keep them —
 * this file is intentionally loaded LATE (after tool-local <style>) so
 * shared rules override. To opt a button into the new look without
 * adopting the .btn class, add .btn-primary / .btn-secondary etc. on
 * top of the existing class.
 * =====================================================================*/

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    height: 32px;
    padding: 0 var(--space-3);
    font-family: inherit;
    font-size: 0.85rem;
    font-weight: 600;
    line-height: 1;
    border: 1px solid var(--border-default);
    border-radius: var(--radius-md);
    background: transparent;
    color: var(--text-default);
    cursor: pointer;
    text-decoration: none;
    white-space: nowrap;
    transition: background 0.12s, border-color 0.12s, color 0.12s, box-shadow 0.12s;
}
.btn:hover { border-color: var(--color-accent); color: var(--color-accent); }
.btn:focus-visible { outline: none; box-shadow: 0 0 0 2px rgba(56,189,248,0.35); }
.btn:disabled, .btn[disabled] { opacity: 0.5; cursor: not-allowed; }

/* --- variants ----------------------------------------------------------- */
.btn-primary {
    background: var(--color-accent-soft);
    border-color: rgba(56,189,248,0.45);
    color: var(--color-accent);
}
.btn-primary:hover {
    background: rgba(56,189,248,0.22);
    border-color: var(--color-accent);
    color: var(--color-accent);
}

.btn-secondary {
    /* alias of base .btn, kept for explicit-intent code */
    background: transparent;
    border-color: var(--border-default);
    color: var(--text-default);
}

.btn-ghost {
    background: transparent;
    border-color: transparent;
    color: var(--text-muted);
}
.btn-ghost:hover { color: var(--color-accent); border-color: transparent; background: var(--color-accent-soft); }

.btn-danger {
    background: var(--color-danger-soft);
    border-color: rgba(248,113,113,0.45);
    color: var(--color-danger);
}
.btn-danger:hover { background: rgba(248,113,113,0.22); border-color: var(--color-danger); color: var(--color-danger); }

/* --- sizes -------------------------------------------------------------- */
.btn-sm { height: 26px; padding: 0 var(--space-2); font-size: 0.78rem; }
.btn-lg { height: 40px; padding: 0 var(--space-5); font-size: 0.95rem; }

/* --- link-style button (used heavily by the portal as .mfr-link) ------- */
/* Kept here so light theme & focus-visible behavior live in one place.   */
.btn-link {
    background: none;
    border: none;
    padding: 0;
    height: auto;
    color: var(--color-accent);
    font-family: inherit;
    font-size: 0.88rem;
    cursor: pointer;
}
.btn-link:hover { text-decoration: underline; }