/* ============================================================
   Buttons — the ONE place button look-and-feel lives.
   Consumes semantic tokens only; themed automatically.
   ============================================================ */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    border: 1px solid transparent;
    border-radius: 10px;
    font-family: 'Nunito', sans-serif;
    font-size: 0.95rem;
    font-weight: 700;
    line-height: 1.2;
    cursor: pointer;
    text-decoration: none;
    transition: background-color 0.15s ease, color 0.15s ease,
                border-color 0.15s ease, box-shadow 0.15s ease,
                transform 0.15s ease;
}

.btn:focus-visible {
    outline: none;
    box-shadow: 0 0 0 3px var(--focus-ring);
}

.btn:disabled,
.btn[aria-disabled="true"] {
    opacity: 0.55;
    cursor: not-allowed;
    transform: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-hover) 100%);
    color: var(--accent-contrast);
    box-shadow: 0 4px 14px var(--accent-soft);
}

.btn-primary:hover:not(:disabled) {
    filter: brightness(1.05);
    transform: translateY(-1px);
    color: var(--accent-contrast);
}

.btn-secondary {
    background: var(--surface-raised);
    color: var(--text);
    border-color: var(--border-strong);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--surface-sunken);
    color: var(--text);
}

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

.btn-ghost:hover:not(:disabled) {
    background: var(--accent-soft);
    color: var(--accent);
}

.btn-danger {
    background: var(--danger);
    color: #FFFFFF;
}

.btn-danger:hover:not(:disabled) {
    filter: brightness(1.08);
    color: #FFFFFF;
}

.btn-sm {
    padding: 6px 14px;
    font-size: 0.85rem;
    border-radius: 8px;
}

.btn-pill {
    border-radius: 999px;
}