/* ============================================================
   05-buttons.css — Button System
   Classes: .btn-y-primary | .btn-y-secondary | .btn-y-ghost
   Cũng override .wp-block-button__link và .button của Astra/Woo.
   ============================================================ */

/* --- Shared base --- */
.btn-y-primary,
.btn-y-secondary,
.btn-y-ghost,
.wp-block-button__link,
button.ast-button,
input[type="submit"],
.ast-button {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	gap: 0.5rem;
	font-family: var(--y-font-sans);
	font-size: 0.9rem;
	font-weight: 500;
	letter-spacing: 0.04em;
	text-transform: uppercase;
	text-decoration: none;
	line-height: 1;
	padding: 0.9rem 2.2rem;
	border-radius: var(--y-radius-sm);
	border: 1px solid transparent;
	cursor: pointer;
	transition: background-color var(--y-duration) var(--y-ease),
				color var(--y-duration) var(--y-ease),
				border-color var(--y-duration) var(--y-ease),
				transform var(--y-duration-fast) var(--y-ease),
				box-shadow var(--y-duration) var(--y-ease);
	white-space: nowrap;
}

.btn-y-primary:focus-visible,
.btn-y-secondary:focus-visible,
.btn-y-ghost:focus-visible {
	outline: 2px solid var(--y-sage);
	outline-offset: 3px;
}

/* --- Primary (sage filled) --- */
.btn-y-primary,
.wp-block-button:not(.is-style-outline) .wp-block-button__link,
input[type="submit"],
.ast-button {
	background-color: var(--y-sage-deep);
	color: var(--y-cream);
	border-color: var(--y-sage-deep);
}

.btn-y-primary:hover,
.btn-y-primary:focus-visible,
.wp-block-button:not(.is-style-outline) .wp-block-button__link:hover,
.wp-block-button:not(.is-style-outline) .wp-block-button__link:focus-visible,
input[type="submit"]:hover,
.ast-button:hover {
	background-color: #4a5343; /* sage-deep darken ~10% */
	color: var(--y-cream);
	border-color: #4a5343;
	transform: translateY(-1px);
	box-shadow: var(--y-shadow-md);
}

.btn-y-primary:active,
.wp-block-button:not(.is-style-outline) .wp-block-button__link:active {
	transform: translateY(0);
	box-shadow: var(--y-shadow-sm);
}

/* --- Secondary (sage outline) --- */
.btn-y-secondary,
.wp-block-button.is-style-outline .wp-block-button__link {
	background-color: transparent;
	color: var(--y-sage-deep);
	border-color: var(--y-sage-deep);
}

.btn-y-secondary:hover,
.btn-y-secondary:focus-visible,
.wp-block-button.is-style-outline .wp-block-button__link:hover {
	background-color: var(--y-sage-deep);
	color: var(--y-cream);
	border-color: var(--y-sage-deep);
}

/* --- Variant: on dark background (cho hero) --- */
.btn-y-secondary--on-dark,
.y-hero .btn-y-secondary {
	color: var(--y-cream);
	border-color: var(--y-cream);
}

.btn-y-secondary--on-dark:hover,
.y-hero .btn-y-secondary:hover {
	background-color: var(--y-cream);
	color: var(--y-sage-deep);
	border-color: var(--y-cream);
}

.btn-y-primary--on-dark,
.y-hero .btn-y-primary {
	background-color: var(--y-cream);
	color: var(--y-sage-deep);
	border-color: var(--y-cream);
}

.btn-y-primary--on-dark:hover,
.y-hero .btn-y-primary:hover {
	background-color: var(--y-cream-warm);
	color: var(--y-sage-deep);
	border-color: var(--y-cream-warm);
}

/* --- Ghost (text-only with arrow) --- */
.btn-y-ghost {
	background-color: transparent;
	color: var(--y-ink);
	border-color: transparent;
	padding: 0.5rem 0;
	text-transform: none;
	letter-spacing: 0.02em;
	font-size: 1rem;
	text-decoration: underline;
	text-decoration-thickness: 1px;
	text-underline-offset: 6px;
	text-decoration-color: var(--y-line);
}

.btn-y-ghost::after {
	content: '→';
	display: inline-block;
	margin-left: 0.4rem;
	font-size: 1.1em;
	transition: transform var(--y-duration) var(--y-ease);
}

.btn-y-ghost:hover {
	color: var(--y-sage-deep);
	text-decoration-color: var(--y-sage-deep);
}

.btn-y-ghost:hover::after {
	transform: translateX(6px);
}

/* Ghost on dark */
.y-hero .btn-y-ghost,
.btn-y-ghost--on-dark {
	color: var(--y-cream);
	text-decoration-color: rgba(var(--y-cream-rgb), 0.4);
}

.y-hero .btn-y-ghost:hover,
.btn-y-ghost--on-dark:hover {
	color: var(--y-cream);
	text-decoration-color: var(--y-cream);
}

/* --- Size modifiers --- */
.btn-y-small {
	padding: 0.6rem 1.4rem;
	font-size: 0.8rem;
}

.btn-y-large {
	padding: 1.1rem 2.8rem;
	font-size: 1rem;
}

/* --- Disabled --- */
.btn-y-primary[disabled],
.btn-y-secondary[disabled],
.btn-y-ghost[disabled],
.wp-block-button__link[disabled] {
	opacity: 0.5;
	cursor: not-allowed;
	pointer-events: none;
}

/* --- Full-width --- */
.btn-y-block {
	display: flex;
	width: 100%;
}