/**
 * Button Component Styles
 * 
 * Nupukomponendi stiilid.
 */

/* ===== Base Button ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    border: none;
    border-radius: var(--border-radius);
    font-family: var(--font-primary);
    font-size: 1rem;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
    user-select: none;
    outline: none;
}

.btn:focus {
    outline: 2px solid var(--secondary-color);
    outline-offset: 2px;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* ===== Button Variants ===== */
.btn-primary {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    gap: 6px;
    background: linear-gradient(135deg, var(--secondary-color), var(--secondary-color));
    color: white;
    padding: 12px 18px;
    border-radius: 25px;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
    position: relative;
    overflow: hidden;
    cursor: pointer;
  
    /* Smooth and specific transitions (no "all") */
    transition: background 0.3s ease, box-shadow 0.3s ease, transform 0.3s ease;
  
    /* GPU optimization – prevents flicker */
    will-change: background, box-shadow, transform;
  
    /* Optional pulse animation (keep if you like) */
    animation: subtle-pulse 2s ease-in-out infinite;
  }
  
  .btn-primary:hover {
    /* Smooth hover gradient */
    background: linear-gradient(135deg, #00C9A7, #00E1B4);
  
    /* Consistent shadow + lift */
    box-shadow: 0 8px 20px rgba(0, 201, 167, 0.25);
    transform: translateY(-2px);
  
    /* Keep color stable and remove text underline */
    color: white;
    text-decoration: none;
  }
  
  .btn-primary:active {
    /* Slightly reduced lift on click for realism */
    transform: translateY(-1px);
    box-shadow: 0 4px 10px rgba(0, 201, 167, 0.2);
    background: linear-gradient(135deg, var(--secondary-color), var(--secondary-color));
  }
  

.btn-primary::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(
        45deg,
        transparent 20%,
        rgba(255, 255, 255, 0.3) 50%,
        transparent 80%
    );
    animation: shine 3s ease-in-out infinite;
}

.btn-primary:hover::before {
    left: 100%;
    animation: none;
}

.btn-secondary {
    background: var(--bg-color);
    color: var(--text-color);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--bg-light);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.btn-outline {
    background: transparent;
    color: var(--secondary-color);
    border: 2px solid var(--secondary-color);
}

.btn-outline:hover:not(:disabled) {
    background: var(--secondary-color);
    color: white;
}

.btn-ghost {
    background: transparent;
    color: var(--text-color);
    border: 1px solid transparent;
}

.btn-ghost:hover:not(:disabled) {
    background: var(--bg-light);
    color: var(--primary-color);
}

.btn-danger {
    background: var(--accent-color);
    color: white;
    border: 1px solid var(--accent-color);
}

.btn-danger:hover:not(:disabled) {
    background: #c0392b;
    border-color: #c0392b;
}

/* ===== Button Sizes ===== */
.btn-sm {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.875rem;
}

.btn-lg {
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: 1.125rem;
}

.btn-xl {
    padding: var(--spacing-lg) var(--spacing-xl);
    font-size: 1.25rem;
}

/* ===== Button Groups ===== */
.btn-group {
    display: inline-flex;
    gap: var(--spacing-xs);
}

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

.btn-group .btn:first-child {
    border-top-left-radius: var(--border-radius);
    border-bottom-left-radius: var(--border-radius);
}

.btn-group .btn:last-child {
    border-top-right-radius: var(--border-radius);
    border-bottom-right-radius: var(--border-radius);
}

/* ===== Icon Buttons ===== */
.btn-icon {
    width: 40px;
    height: 40px;
    padding: 0;
    border-radius: 50%;
}

.btn-icon.btn-sm {
    width: 32px;
    height: 32px;
}

.btn-icon.btn-lg {
    width: 48px;
    height: 48px;
}

/* ===== Loading State ===== */
.btn-loading {
    position: relative;
    color: transparent;
}

.btn-loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 16px;
    height: 16px;
    border: 2px solid transparent;
    border-top: 2px solid currentColor;
    border-radius: 50%;
    animation: btn-spin 1s linear infinite;
}

.btn-loading.btn-primary::after {
    border-top-color: white;
}

.btn-loading.btn-secondary::after,
.btn-loading.btn-outline::after,
.btn-loading.btn-ghost::after {
    border-top-color: var(--text-color);
}

@keyframes btn-spin {
    0% { transform: translate(-50%, -50%) rotate(0deg); }
    100% { transform: translate(-50%, -50%) rotate(360deg); }
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    .btn-group {
        width: 100%;
    }
    
    .btn-group .btn {
        flex: 1;
    }
}

/* Desktop btn-primary styles */
@media (min-width: 1024px) {
    .btn-primary {
        gap: 8px;
        padding: 13px 28px; /* larger desktop padding */
        border-radius: 25px;
        font-size: 1rem;
    }
}

/* ===== Animations ===== */
@keyframes subtle-pulse {
    0%, 100% {
        box-shadow: 0 4px 12px rgba(0, 212, 170, 0.4);
    }
    50% {
        box-shadow: 0 8px 20px rgba(0, 212, 170, 0.7);
    }
}

@keyframes shine {
    0% {
        transform: translateX(-100%) translateY(-100%);
    }
    100% {
        transform: translateX(100%) translateY(100%);
    }
}

/* ===== Accessibility ===== */
@media (prefers-reduced-motion: reduce) {
    .btn {
        transition: none;
    }
    
    .btn-loading::after {
        animation: none;
    }
    
    .btn-primary {
        animation: none;
    }
    
    .btn-primary::before {
        animation: none;
    }
}