/*
╔═══════════════════════════════════════════════════════════════════╗
║ IO BUTTON CSS - Enhanced with animation variations              ║
╚═══════════════════════════════════════════════════════════════════╝
*/

/* ====================================================================
   BASE BUTTON STYLES
   ==================================================================== */

.io-button {
    /* Reset default button styles */
    all: unset;
    
    /* Core styles */
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--io-space-sm);
    font-family: var(--io-font-primary);
    font-size: var(--io-text-sm);
    font-weight: 500;
    text-align: center;
    text-decoration: none;
    white-space: nowrap;
    cursor: pointer;
    user-select: none;
    outline: none;
    transition: all var(--io-transition-base);
    position: relative;
    overflow: hidden;
    
    /* Ensure proper sizing */
    box-sizing: border-box;
}

.io-button:focus-visible {
    outline: 2px solid var(--io-accent);
    outline-offset: 2px;
}

/* ====================================================================
   SIZE VARIANTS
   ==================================================================== */

.io-button-sm {
    height: var(--io-button-height-sm);
    padding: 0 var(--io-space-sm);
    font-size: var(--io-text-xs);
    gap: var(--io-space-xs);
}

.io-button-md {
    height: var(--io-button-height);
    padding: 0 var(--io-space-md);
    font-size: var(--io-text-sm);
    gap: var(--io-space-sm);
}

.io-button-lg {
    height: var(--io-button-height-lg);
    padding: 0 var(--io-space-lg);
    font-size: var(--io-text-base);
    gap: var(--io-space-md);
}

/* ====================================================================
   VARIANT STYLES
   ==================================================================== */

/* Primary */
.io-button-primary {
    background: var(--io-accent);
    color: var(--io-on-accent);
    border: 1px solid var(--io-accent);
}

.io-button-primary:hover {
    background: var(--io-accent-bright);
    border-color: var(--io-accent-bright);
}

.io-button-primary:active {
    background: var(--io-accent-dim);
    border-color: var(--io-accent-dim);
}

/* Secondary */
.io-button-secondary {
    background: var(--io-surface-raised);
    color: var(--io-text-primary);
    border: 1px solid var(--io-border);
}

.io-button-secondary:hover {
    background: var(--io-surface-hover);
    border-color: var(--io-accent);
    color: var(--io-accent);
}

.io-button-secondary:active {
    background: var(--io-surface-sunken);
}

/* Danger */
.io-button-danger {
    background: var(--io-error);
    color: var(--io-on-accent);
    border: 1px solid var(--io-error);
}

.io-button-danger:hover {
    background: var(--io-error-dim);
    border-color: var(--io-error-dim);
}

.io-button-danger:active {
    background: var(--io-error-subtle);
    color: var(--io-error);
}

/* Ghost */
.io-button-ghost {
    background: transparent;
    color: var(--io-text-secondary);
    border: 1px solid transparent;
}

.io-button-ghost:hover {
    background: var(--io-surface-hover);
    color: var(--io-text-primary);
    border-color: var(--io-border);
}

.io-button-ghost:active {
    background: var(--io-surface-sunken);
}

/* ====================================================================
   DISABLED STATE
   ==================================================================== */

.io-button-disabled {
    opacity: var(--io-disabled-opacity);
    cursor: not-allowed;
    pointer-events: none;
}

/* ====================================================================
   ANIMATION STYLES
   ==================================================================== */

/* Swift - Clean, fast transitions */
.io-button-swift {
    transition: all var(--io-transition-fast);
}

.io-button-swift:hover {
    transform: translateY(-1px);
}

.io-button-swift:active {
    transform: translateY(0);
}

/* SVG - Scalable vector graphics style */
.io-button-svg {
    transition: all var(--io-transition-base);
    position: relative;
}

.io-button-svg::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: conic-gradient(from 0deg, transparent, var(--io-accent), transparent);
    border-radius: inherit;
    opacity: 0;
    transition: opacity var(--io-transition-base);
    z-index: -1;
}

.io-button-svg:hover::before {
    opacity: 0.7;
    animation: io-button-svg-rotate 2s linear infinite;
}

@keyframes io-button-svg-rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* Borders - Animated border effects */
.io-button-borders {
    transition: all var(--io-transition-base);
    position: relative;
}

.io-button-borders::before,
.io-button-borders::after {
    content: '';
    position: absolute;
    background: var(--io-accent);
    transition: all var(--io-transition-base);
}

.io-button-borders::before {
    top: 0;
    left: 0;
    width: 0;
    height: 2px;
}

.io-button-borders::after {
    bottom: 0;
    right: 0;
    width: 0;
    height: 2px;
}

.io-button-borders:hover::before,
.io-button-borders:hover::after {
    width: 100%;
}

/* Pretty - Smooth, elegant effects */
.io-button-pretty {
    transition: all var(--io-transition-slow);
    position: relative;
    overflow: hidden;
}

.io-button-pretty::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: radial-gradient(circle, rgba(255,255,255,0.3) 0%, transparent 70%);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width var(--io-transition-slow), height var(--io-transition-slow);
}

.io-button-pretty:hover::before {
    width: 300px;
    height: 300px;
}

.io-button-pretty:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

/* Neon - Glowing cyberpunk style */
.io-button-neon {
    transition: all var(--io-transition-base);
    position: relative;
    text-shadow: 0 0 10px currentColor;
}

.io-button-neon::before {
    content: '';
    position: absolute;
    top: -1px;
    left: -1px;
    right: -1px;
    bottom: -1px;
    background: inherit;
    border-radius: inherit;
    filter: blur(8px);
    opacity: 0;
    transition: opacity var(--io-transition-base);
    z-index: -1;
}

.io-button-neon:hover::before {
    opacity: 0.7;
    animation: io-button-neon-pulse 1.5s ease-in-out infinite alternate;
}

@keyframes io-button-neon-pulse {
    from { filter: blur(8px) brightness(1); }
    to { filter: blur(12px) brightness(1.2); }
}

.io-button-neon:hover {
    transform: translateY(-1px);
    box-shadow: 0 0 20px var(--io-accent-glow);
}

/* ====================================================================
   SPECIAL MODIFIERS
   ==================================================================== */

/* Pill style */
.io-button-pill {
    border-radius: var(--io-radius-full);
}

/* Icon-only buttons */
.io-button:has(.io-button-icon-left:not(:has(.io-button-text))),
.io-button:has(.io-button-icon-right:not(:has(.io-button-text))) {
    width: var(--io-button-height);
    padding: 0;
    justify-content: center;
}

.io-button-sm:has(.io-button-icon-left:not(:has(.io-button-text))),
.io-button-sm:has(.io-button-icon-right:not(:has(.io-button-text))) {
    width: var(--io-button-height-sm);
}

.io-button-lg:has(.io-button-icon-left:not(:has(.io-button-text))),
.io-button-lg:has(.io-button-icon-right:not(:has(.io-button-text))) {
    width: var(--io-button-height-lg);
}

/* Icon spacing */
.io-button-icon-left,
.io-button-icon-right {
    font-size: 1em;
    display: flex;
    align-items: center;
}

.io-button-icon-left {
    margin-right: calc(var(--io-space-sm) * -0.5);
}

.io-button-icon-right {
    margin-left: calc(var(--io-space-sm) * -0.5);
}

/* ====================================================================
   GROUPS AND TOOLBARS
   ==================================================================== */

.io-button-group {
    display: inline-flex;
    gap: 1px;
    background: var(--io-border);
    border-radius: var(--io-radius-md);
    padding: 1px;
}

.io-button-group .io-button {
    border-radius: 0;
    margin: 0;
}

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

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

.io-button-group .io-button:only-child {
    border-radius: var(--io-radius-md);
}

/* ====================================================================
   RESPONSIVE ADJUSTMENTS
   ==================================================================== */

@media (max-width: 768px) {
    .io-button {
        font-size: var(--io-text-xs);
        padding: 0 var(--io-space-sm);
    }
    
    .io-button-lg {
        font-size: var(--io-text-sm);
        padding: 0 var(--io-space-md);
    }
}