/* ── Button ─────────────────────────────────────────────── */
.gs-button {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    border-radius: var(--gs-radius-sm, 4px);
    font-size: var(--gs-font-size-sm, 0.875rem);
    font-weight: 500;
    border: 1px solid transparent;
    cursor: pointer;
    transition: background-color 0.15s ease;
}

.gs-button--primary {
    background: var(--color-primary);
    color: #fff;
}

.gs-button--primary:hover {
    background: var(--color-primary-hover);
}

.gs-button--secondary {
    background: transparent;
    border-color: var(--color-border);
    color: var(--color-text);
}

.gs-button--danger {
    background: var(--color-danger);
    color: #fff;
}

.gs-button--ghost {
    background: transparent;
    color: var(--color-text-muted);
}

.gs-button--ghost:hover {
    background: var(--color-surface-hover);
}

.gs-button--sm {
    padding: 0.3rem 0.75rem;
    font-size: 0.8rem;
}

.gs-button--lg {
    padding: 0.875rem 1.5rem;
    font-size: 1rem;
}

.gs-button--full {
    width: 100%;
    justify-content: center;
}

.gs-button--ghost-danger {
    border-color: transparent;
    background: transparent;
    color: var(--color-danger);
}

.gs-button.is-disabled {
    opacity: 0.45;
    pointer-events: none;
}

/* ── Input ──────────────────────────────────────────────── */
.gs-input {
    display: block;
    width: 100%;
    padding: 0.6rem 0.75rem;
    border: 1px solid var(--color-border);
    border-radius: var(--gs-radius-md, 0.5rem);
    background: var(--color-surface);
    color: var(--color-text);
    font: inherit;
    outline: none;
    box-sizing: border-box;
    transition: border-color 0.15s;
}

.gs-input:focus {
    border-color: var(--color-primary);
}

.gs-input::placeholder {
    color: var(--color-text-muted);
}

/* ── Alert ──────────────────────────────────────────────── */
.gs-alert {
    margin: 1rem;
    padding: 0.75rem 1rem;
    border-radius: var(--gs-radius-md, 0.5rem);
}

.gs-alert--success {
    background: #dcfce7;
    color: #166534;
}

.gs-alert--error,
.gs-validation {
    color: var(--color-danger);
}

.gs-alert--error {
    background: var(--color-danger-bg);
}

/* ── Back link ──────────────────────────────────────────── */
.gs-back-link {
    display: inline-block;
    margin-bottom: 0.5rem;
    color: var(--color-primary);
    text-decoration: none;
}

/* ── Utilities ──────────────────────────────────────────── */
.gs-visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ── Bootstrap overrides ────────────────────────────────── */
.btn:focus,
.btn:active:focus,
.btn-link.nav-link:focus,
.form-control:focus,
.form-check-input:focus {
    box-shadow: 0 0 0 0.1rem white, 0 0 0 0.25rem #258cfb;
}