/**
 * Hello Middleton - Button System
 * Unified button components with variants and states.
 * Uses BEM naming convention.
 *
 * @requires critical/tokens.css
 */

/* =========================================================================
   BASE BUTTON - .hm-btn
   ========================================================================= */

.hm-btn {
    /* Reset */
    appearance: none;
    border: none;
    background: none;
    font: inherit;
    cursor: pointer;

    /* Base styles */
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-2-5) var(--space-4);
    font-family: var(--font-body);
    font-size: var(--text-sm);
    font-weight: var(--font-semibold);
    line-height: 1;
    text-decoration: none;
    white-space: nowrap;
    border-radius: var(--radius-md);
    transition:
        background var(--duration-fast) var(--ease-out),
        color var(--duration-fast) var(--ease-out),
        border-color var(--duration-fast) var(--ease-out),
        box-shadow var(--duration-fast) var(--ease-out),
        transform var(--duration-fast) var(--ease-out);

    /* Default variant (same as secondary) */
    background: var(--hm-bg-elevated);
    color: var(--hm-text);
    border: 1px solid var(--hm-border);
}

.hm-btn:hover {
    background: var(--hm-bg-subtle);
    border-color: var(--hm-border-strong);
}

.hm-btn:focus-visible {
    outline: none;
    box-shadow: var(--shadow-glow);
}

.hm-btn:active {
    transform: scale(0.98);
}

.hm-btn:disabled,
.hm-btn.disabled {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}

/* =========================================================================
   BUTTON VARIANTS
   ========================================================================= */

/* Primary Button - Main CTA */
.hm-btn--primary {
    background: var(--hm-primary);
    color: var(--hm-text-inverse);
    border-color: var(--hm-primary);
}

.hm-btn--primary:hover {
    background: var(--hm-primary-hover);
    border-color: var(--hm-primary-hover);
}

/* Secondary Button - Default, outlined */
.hm-btn--secondary {
    background: var(--hm-bg-elevated);
    color: var(--hm-text);
    border: 1px solid var(--hm-border);
}

.hm-btn--secondary:hover {
    background: var(--hm-bg-subtle);
    border-color: var(--hm-border-strong);
}

/* Accent Button - Trust actions */
.hm-btn--accent {
    background: var(--hm-accent);
    color: var(--hm-text-inverse);
    border-color: var(--hm-accent);
}

.hm-btn--accent:hover {
    background: var(--hm-accent-hover);
    border-color: var(--hm-accent-hover);
}

.hm-btn--accent:focus-visible {
    box-shadow: var(--shadow-glow-accent);
}

/* Ghost Button - Minimal, text-like */
.hm-btn--ghost {
    background: transparent;
    color: var(--hm-text-secondary);
    border-color: transparent;
}

.hm-btn--ghost:hover {
    background: var(--hm-bg-subtle);
    color: var(--hm-text);
}

/* Danger Button - Destructive actions */
.hm-btn--danger {
    background: var(--hm-danger);
    color: var(--hm-text-inverse);
    border-color: var(--hm-danger);
}

.hm-btn--danger:hover {
    background: #B91C1C; /* darker red */
    border-color: #B91C1C;
}

.hm-btn--danger:focus-visible {
    box-shadow: var(--shadow-glow-danger);
}

/* Success Button */
.hm-btn--success {
    background: var(--hm-success);
    color: var(--hm-text-inverse);
    border-color: var(--hm-success);
}

.hm-btn--success:hover {
    background: #166534; /* darker green */
    border-color: #166534;
}

/* Link Button - Looks like a link */
.hm-btn--link {
    background: transparent;
    color: var(--hm-primary);
    border: none;
    padding: 0;
    text-decoration: underline;
    text-underline-offset: 2px;
}

.hm-btn--link:hover {
    color: var(--hm-primary-hover);
    background: transparent;
}

/* =========================================================================
   BUTTON SIZES
   ========================================================================= */

/* Small */
.hm-btn--sm {
    padding: var(--space-1-5) var(--space-3);
    font-size: var(--text-xs);
    border-radius: var(--radius-sm);
}

/* Large */
.hm-btn--lg {
    padding: var(--space-3) var(--space-6);
    font-size: var(--text-base);
    border-radius: var(--radius-lg);
}

/* Extra Large */
.hm-btn--xl {
    padding: var(--space-4) var(--space-8);
    font-size: var(--text-lg);
    border-radius: var(--radius-lg);
}

/* =========================================================================
   BUTTON MODIFIERS
   ========================================================================= */

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

/* Rounded pill */
.hm-btn--pill {
    border-radius: var(--radius-full);
}

/* Icon only */
.hm-btn--icon {
    padding: var(--space-2);
    aspect-ratio: 1;
}

.hm-btn--icon.hm-btn--sm {
    padding: var(--space-1-5);
}

.hm-btn--icon.hm-btn--lg {
    padding: var(--space-3);
}

/* =========================================================================
   BUTTON WITH ICON
   ========================================================================= */

.hm-btn__icon {
    width: 1em;
    height: 1em;
    flex-shrink: 0;
}

.hm-btn__icon--left {
    margin-right: var(--space-1);
}

.hm-btn__icon--right {
    margin-left: var(--space-1);
}

/* =========================================================================
   BUTTON GROUPS
   ========================================================================= */

.hm-btn-group {
    display: inline-flex;
}

.hm-btn-group .hm-btn {
    border-radius: 0;
}

.hm-btn-group .hm-btn:first-child {
    border-radius: var(--radius-md) 0 0 var(--radius-md);
}

.hm-btn-group .hm-btn:last-child {
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.hm-btn-group .hm-btn:not(:first-child) {
    margin-left: -1px;
}

.hm-btn-group .hm-btn:hover,
.hm-btn-group .hm-btn:focus {
    z-index: 1;
}

/* =========================================================================
   WORDPRESS INTEGRATION
   Common button classes used by WordPress/plugins
   ========================================================================= */

/* WP Submit buttons */
.wp-block-button__link,
input[type="submit"],
button[type="submit"],
.button,
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-2-5) var(--space-4);
    font-family: var(--font-body);
    font-size: var(--text-sm);
    font-weight: var(--font-semibold);
    line-height: 1.2;
    text-decoration: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition:
        background var(--duration-fast) var(--ease-out),
        color var(--duration-fast) var(--ease-out),
        border-color var(--duration-fast) var(--ease-out),
        box-shadow var(--duration-fast) var(--ease-out);
}

/* Primary style for main submit buttons */
input[type="submit"],
button[type="submit"],
.wp-block-button__link,
.button-primary {
    background: var(--hm-primary);
    color: var(--hm-text-inverse);
    border: 1px solid var(--hm-primary);
}

input[type="submit"]:hover,
button[type="submit"]:hover,
.wp-block-button__link:hover,
.button-primary:hover {
    background: var(--hm-primary-hover);
    border-color: var(--hm-primary-hover);
}

/* Secondary buttons */
.button-secondary,
.button:not(.button-primary) {
    background: var(--hm-bg-elevated);
    color: var(--hm-text);
    border: 1px solid var(--hm-border);
}

.button-secondary:hover,
.button:not(.button-primary):hover {
    background: var(--hm-bg-subtle);
    border-color: var(--hm-border-strong);
}

/* =========================================================================
   MOBILE TOUCH TARGETS
   Ensure buttons meet 44px minimum touch target
   ========================================================================= */

@media (max-width: 767px) {
    .hm-btn {
        min-height: 44px;
        padding: var(--space-3) var(--space-4);
    }

    .hm-btn--sm {
        min-height: 36px;
        padding: var(--space-2) var(--space-3);
    }

    input[type="submit"],
    button[type="submit"],
    .button {
        min-height: 44px;
        padding: var(--space-3) var(--space-4);
    }
}

/* =========================================================================
   LOADING STATE
   ========================================================================= */

.hm-btn--loading {
    position: relative;
    color: transparent !important;
    pointer-events: none;
}

.hm-btn--loading::after {
    content: '';
    position: absolute;
    width: 1em;
    height: 1em;
    border: 2px solid currentColor;
    border-right-color: transparent;
    border-radius: var(--radius-full);
    animation: btn-spin 0.6s linear infinite;
}

@keyframes btn-spin {
    to { transform: rotate(360deg); }
}