// _buttons.scss
// Gumi.css v1.0.0

// Base button
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    white-space: nowrap;
    border-radius: var(--gumi-radius-md);
    font-size: var(--gumi-text-sm);
    font-weight: var(--gumi-font-medium);
    font-family: inherit;
    line-height: 1;
    height: 2.5rem;
    padding: 0 1rem;
    border: 1px solid transparent;
    cursor: pointer;
    text-decoration: none;
    transition: all 150ms cubic-bezier(0.4, 0, 0.2, 1);
    
    @include focus-ring;
    
    &:disabled {
        pointer-events: none;
        opacity: 0.5;
        cursor: not-allowed;
    }
    
    // Default style - foreground bg with background text (inverted)
    background-color: var(--gumi-foreground);
    color: var(--gumi-background);
    box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    
    &:hover:not(:disabled) {
        opacity: 0.9;
    }
    
    &:active:not(:disabled) {
        opacity: 0.8;
    }
}

// Size modifiers
.btn.btn-sm {
    height: 2rem;
    padding: 0 0.75rem;
    font-size: var(--gumi-text-xs);
}

.btn.btn-lg {
    height: 3rem;
    padding: 0 1.5rem;
    font-size: var(--gumi-text-base);
}

// Icon button
.btn.btn-icon {
    width: 2.5rem;
    padding: 0;
    
    &.btn-sm {
        width: 2rem;
        height: 2rem;
    }
    
    &.btn-lg {
        width: 3rem;
        height: 3rem;
    }
}

// Secondary variant
.btn.btn-secondary {
    background-color: var(--gumi-bg-secondary);
    color: var(--gumi-foreground);
    box-shadow: none;
    
    &:hover:not(:disabled) {
        background-color: var(--gumi-bg-tertiary);
    }
    
    &:active:not(:disabled) {
        background-color: var(--gumi-bg-tertiary);
        opacity: 0.9;
    }
}

// Outline variant
.btn.btn-outline {
    background-color: transparent;
    color: var(--gumi-foreground);
    border: 2px solid var(--gumi-foreground);
    box-shadow: none;
    
    &:hover:not(:disabled) {
        background-color: var(--gumi-hover-darken);
    }
    
    &:active:not(:disabled) {
        background-color: var(--gumi-active-darken);
    }
}

// Ghost variant
.btn.btn-ghost {
    background-color: transparent;
    color: var(--gumi-foreground);
    border: 1px solid transparent;
    box-shadow: none;
    
    &:hover:not(:disabled) {
        background-color: var(--gumi-bg-secondary);
    }
    
    &:active:not(:disabled) {
        background-color: var(--gumi-bg-tertiary);
    }
}

// Link variant
.btn.btn-link {
    background-color: transparent;
    color: var(--gumi-primary);
    border: 1px solid transparent;
    text-decoration: underline;
    text-underline-offset: 4px;
    height: auto;
    box-shadow: none;
    
    &:hover:not(:disabled) {
        opacity: 0.8;
    }
    
    &:active:not(:disabled) {
        opacity: 0.6;
    }
}

// Destructive variant
.btn.btn-destructive {
    background-color: var(--gumi-error);
    color: white;
    box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    
    &:hover:not(:disabled) {
        opacity: 0.9;
    }
    
    &:active:not(:disabled) {
        opacity: 0.8;
    }
}

// Success variant
.btn.btn-success {
    background-color: var(--gumi-success);
    color: white;
    box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    
    &:hover:not(:disabled) {
        opacity: 0.9;
    }
    
    &:active:not(:disabled) {
        opacity: 0.8;
    }
}

// Warning variant
.btn.btn-warning {
    background-color: var(--gumi-warning);
    color: white;
    box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    
    &:hover:not(:disabled) {
        opacity: 0.9;
    }
    
    &:active:not(:disabled) {
        opacity: 0.8;
    }
}

// Loading state
.btn[data-loading="true"] {
    position: relative;
    color: transparent !important;
    pointer-events: none;
    
    &::after {
        content: "";
        position: absolute;
        width: 1rem;
        height: 1rem;
        top: 50%;
        left: 50%;
        margin-left: -0.5rem;
        margin-top: -0.5rem;
        border: 2px solid rgba(255, 255, 255, 0.3);
        border-radius: 50%;
        animation: button-loading-spinner 0.8s linear infinite;
    }
    
    &::before {
        content: "";
        position: absolute;
        width: 1rem;
        height: 1rem;
        top: 50%;
        left: 50%;
        margin-left: -0.5rem;
        margin-top: -0.5rem;
        border: 2px solid transparent;
        border-top-color: currentColor;
        border-radius: 50%;
        animation: button-loading-spinner 0.8s linear infinite;
    }
}

// Loading colors for default button
.btn[data-loading="true"]:not(.btn-secondary):not(.btn-outline):not(.btn-ghost):not(.btn-link):not(.btn-destructive):not(.btn-success):not(.btn-warning) {
    &::before {
        border-top-color: var(--gumi-background);
    }
}

// Loading colors for light background buttons
.btn.btn-secondary[data-loading="true"],
.btn.btn-ghost[data-loading="true"] {
    &::after {
        border-color: rgba(0, 0, 0, 0.1);
    }
    
    &::before {
        border-top-color: var(--gumi-foreground);
    }
}

// Loading colors for outline button
.btn.btn-outline[data-loading="true"] {
    &::after {
        border-color: transparent;
    }
    
    &::before {
        border-top-color: var(--gumi-foreground);
    }
}

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

// Button group
.btn-group {
    display: inline-flex;
    
    > .btn {
        &:not(:first-child) {
            margin-left: -1px;
            border-top-left-radius: 0;
            border-bottom-left-radius: 0;
        }
        
        &:not(:last-child) {
            border-top-right-radius: 0;
            border-bottom-right-radius: 0;
        }
        
        &:hover,
        &:focus {
            z-index: 1;
        }
    }
}

// Icon in button
.btn svg {
    width: 1rem;
    height: 1rem;
    fill: none;
    stroke: currentColor;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.btn.btn-sm svg {
    width: 0.875rem;
    height: 0.875rem;
}

.btn.btn-lg svg {
    width: 1.125rem;
    height: 1.125rem;
}

// With icon
.btn-with-icon {
    gap: 0.5rem;
}

// Full width
.btn-block {
    width: 100%;
}

// Dark mode adjustments
[data-theme="dark"] {
    // Outline in dark mode - use hover lighten effect
    .btn.btn-outline {
        &:hover:not(:disabled) {
            background-color: var(--gumi-hover-lighten);
        }
        
        &:active:not(:disabled) {
            background-color: var(--gumi-active-lighten);
        }
    }
}

// FAB
.fab {
    position: fixed;
    bottom: var(--gumi-space-6);
    right: var(--gumi-space-6);
    width: 3.5rem;
    height: 3.5rem;
    border-radius: var(--gumi-radius-full);
    background-color: var(--gumi-foreground);
    color: var(--gumi-background);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--gumi-shadow-lg);
    z-index: var(--gumi-z-fixed);
    transition: all 150ms ease;
    
    &:hover {
        opacity: 0.9;
        box-shadow: var(--gumi-shadow-xl);
    }
    
    &.fab-sm {
        width: 2.5rem;
        height: 2.5rem;
    }
    
    &.fab-extended {
        width: auto;
        padding: 0 var(--gumi-space-6);
        gap: var(--gumi-space-2);
    }
}

// Close button
.btn-close {
    background: transparent;
    border: none;
    width: 2rem;
    height: 2rem;
    padding: 0;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--gumi-radius-sm);
    color: var(--gumi-muted);
    transition: all 150ms ease;
    
    &:hover {
        background-color: var(--gumi-bg-secondary);
        color: var(--gumi-foreground);
    }
    
    svg {
        width: 1.25rem;
        height: 1.25rem;
    }
}