.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-xl);
    font-weight: 600;
    font-size: 1rem;
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
    cursor: pointer;
    text-decoration: none;
    border: none;
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.btn-primary {
    background: var(--button-primary);
    color: var(--text-on-accent);
    box-shadow: var(--shadow-primary);
}

.btn-primary:visited {
    color: var(--text-on-accent);
}

.btn-primary::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.18) 0%, transparent 100%);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.btn-primary:hover {
    transform: none;
    background: var(--button-primary-hover);
    color: var(--text-on-accent);
}

.btn-primary:active {
    background: var(--button-primary-active);
    color: var(--text-on-accent);
}

.btn-primary:hover::after {
    opacity: 1;
}

.btn-premium {
    padding: 0.75rem 1.5rem;
    font-weight: 600;
    font-size: 0.95rem;
    border-radius: var(--radius-md);
    transition: all 0.2s ease;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.btn-primary-premium {
    background: var(--surface);
    color: var(--text-primary);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
}

.btn-primary-premium:visited {
    color: var(--text-primary);
}

.btn-primary-premium:hover {
    background: var(--surface-hover);
    border-color: var(--border-light);
    color: var(--text-primary);
}

.btn-outline-premium {
    background: transparent;
    color: var(--primary);
    border: 1px solid var(--border-light);
}

.btn-outline-premium:visited {
    color: var(--primary);
}

.btn-outline-premium:hover {
    background: var(--overlay-accent);
    border-color: var(--primary);
    color: var(--primary-hover);
}

/* === Tertiary action — text link with trailing arrow ===
   Used for in-flow secondary actions next to a primary/ghost button pair
   (e.g. hero "Read the docs →"). Intentionally not a `.btn` so it
   inherits typographic rhythm and never competes with a real CTA. */
.ak-action-link {
    display: inline-flex;
    align-items: baseline;
    gap: 0.4rem;
    color: var(--primary);
    font-weight: 600;
    font-size: 0.95rem;
    text-decoration: none;
    border-bottom: 1px solid color-mix(in srgb, var(--primary) 35%, transparent);
    padding-bottom: 0.1rem;
    line-height: 1.3;
}

.ak-action-link:visited {
    color: var(--primary);
}

.ak-action-link:hover,
.ak-action-link:focus-visible {
    color: var(--primary-hover);
    border-bottom-color: var(--primary-hover);
}

.ak-action-link__arrow {
    font-weight: 500;
    transition: transform var(--transition-fast);
    transform: translateX(0);
    display: inline-block;
}

.ak-action-link:hover .ak-action-link__arrow,
.ak-action-link:focus-visible .ak-action-link__arrow {
    transform: translateX(2px);
}