/* ═══════════════════════════════════════════════════
   PHASE 6 — POLISH & QA
   Breadcrumbs, Empty States, Accessibility, Animations
   ═══════════════════════════════════════════════════ */

/* ── Breadcrumbs ── */
.kn-breadcrumb {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.75rem;
    color: var(--kanien-text-muted);
    margin-bottom: 2rem;
    padding-top: 2rem;
    /* Add breathing room below header */
}

.kn-breadcrumb a {
    color: var(--kanien-text-muted);
    text-decoration: none;
    transition: color 200ms ease;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 500;
}

.kn-breadcrumb a:hover {
    color: var(--kanien-primary);
}

.kn-breadcrumb__sep {
    font-size: 0.625rem;
    opacity: 0.4;
}

.kn-breadcrumb__current {
    color: var(--kanien-text);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ── Empty States ── */
.kn-empty {
    text-align: center;
    padding: 6rem 1rem;
    max-width: 480px;
    margin: 0 auto;
}

.kn-empty svg {
    color: var(--kanien-text-muted);
    margin-bottom: 1.5rem;
    opacity: 0.3;
}

.kn-empty h3 {
    font-family: var(--kanien-font-display);
    font-size: 1.75rem;
    margin-bottom: 0.75rem;
    color: var(--kanien-text);
}

.kn-empty p {
    color: var(--kanien-text-muted);
    margin-bottom: 2rem;
    line-height: 1.6;
}

/* ── Buttons: Outline Dark ── */
.kn-btn--outline-dark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 3.25rem;
    padding: 0 2rem;
    background: transparent;
    border: 1px solid var(--kanien-border);
    color: var(--kanien-text);
    font-weight: 700;
    font-size: 0.9375rem;
    text-decoration: none;
    transition: all 300ms cubic-bezier(0.16, 1, 0.3, 1);
    border-radius: 0;
    /* Sharp */
}

.kn-btn--outline-dark:hover {
    border-color: var(--kanien-text);
    background: var(--kanien-text);
    color: var(--kanien-bg);
}

/* ── Animation: Shake (Form Error) ── */
@keyframes kn-shake {

    0%,
    100% {
        transform: translateX(0);
    }

    10%,
    30%,
    50%,
    70%,
    90% {
        transform: translateX(-4px);
    }

    20%,
    40%,
    60%,
    80% {
        transform: translateX(4px);
    }
}

/* ── Accessibility: Focus Styles (Keyboard Only) ── */
body.kanien-keyboard-nav :focus-visible {
    outline: 2px solid var(--kanien-primary);
    outline-offset: 4px;
}

body.kanien-keyboard-nav .kn-btn:focus-visible,
body.kanien-keyboard-nav a:focus-visible,
body.kanien-keyboard-nav button:focus-visible,
body.kanien-keyboard-nav input:focus-visible,
body.kanien-keyboard-nav textarea:focus-visible,
body.kanien-keyboard-nav select:focus-visible {
    outline: 2px solid var(--kanien-primary);
    outline-offset: 2px;
}