.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    gap: 0.5rem;
    padding: 0.8rem 1.25rem;
    border-radius: var(--radius-sm);
    border: 1px solid transparent;
    font: inherit;
    font-weight: 700;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    box-shadow: var(--shadow-sm);
    text-decoration: none;
}

.btn:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow);
}

.btn:active {
    transform: translateY(0);
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.btn--disabled,
.btn[aria-disabled='true'] {
    opacity: 0.6;
    cursor: not-allowed;
    pointer-events: none;
    transform: none;
}

.btn--primary {
    background: linear-gradient(180deg, var(--copper), #c9721d);
    color: #fff;
    border-color: rgba(161, 88, 20, 0.28);
}

.btn--primary:hover {
    background: linear-gradient(180deg, var(--copper), #c9721d);
}

.btn--secondary {
    background: rgba(255, 255, 255, 0.94);
    border-color: var(--line);
    color: var(--navy);
    box-shadow: none;
}

.btn--ghost {
    background: transparent;
    border-color: var(--line);
    color: var(--ink);
    box-shadow: none;
}

.btn--ghost-danger {
    background: rgba(255, 255, 255, 0.84);
    color: #a53d3d;
    border: 1px solid rgba(165, 61, 61, 0.16);
    box-shadow: none;
}

.btn--ghost-danger:hover {
    background: var(--rose-soft);
    border-color: var(--rose-border);
    color: #8f2f2f;
    box-shadow: none;
}

.btn--ghost:hover,
.btn--secondary:hover {
    border-color: rgba(207, 122, 37, 0.4);
    color: var(--copper);
    box-shadow: none;
}

.btn--secondary.btn--icon {
    background: var(--sky-soft);
    border-color: var(--sky-border);
}

.btn--ghost-danger.btn--icon {
    background: var(--rose-soft);
    border-color: var(--rose-border);
}

.btn--full {
    width: 100%;
}

.btn--with-icon {
    gap: 0.65rem;
}

.btn--small {
    min-height: 34px;
    padding: 0.45rem 0.8rem;
    font-size: 0.88rem;
    box-shadow: none;
}

.btn--icon {
    width: 42px;
    min-width: 42px;
    min-height: 42px;
    padding: 0;
    border-radius: var(--radius-sm);
    overflow: visible;
}

.btn__icon-svg {
    width: 18px;
    height: 18px;
    display: block;
    flex: none;
    stroke: currentColor;
    fill: none;
    vector-effect: non-scaling-stroke;
}

.btn--small.btn--icon {
    width: 34px;
    min-width: 34px;
    min-height: 34px;
    border-radius: 10px;
}

.btn--small .btn__icon-svg,
.btn--small.btn--icon .btn__icon-svg {
    width: 15px;
    height: 15px;
}