/* Custom CSS for futuristic design and animations */

/* Animation delays */
@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-20px); }
}

@keyframes pulse-glow {
    0%, 100% { box-shadow: 0 0 20px rgba(168, 85, 247, 0.5); }
    50% { box-shadow: 0 0 40px rgba(168, 85, 247, 0.8); }
}

@keyframes slide-in-up {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes gradient-shift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

/* Utility classes */
.animation-delay-2000 {
    animation-delay: 2s;
}

.animation-delay-4000 {
    animation-delay: 4s;
}

.animate-float {
    animation: float 6s ease-in-out infinite;
}

.animate-pulse-glow {
    animation: pulse-glow 2s ease-in-out infinite;
}

.animate-slide-in {
    animation: slide-in-up 0.6s ease-out;
}

/* Custom scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.1);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(135deg, #5a67d8 0%, #6b46c1 100%);
}

/* Glassmorphism effects */
.glass {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.glass-heavy {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

/* Gradient text */
.gradient-text {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Hover effects */
.hover-lift {
    transition: all 0.3s ease;
}

.hover-lift:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

/* Button styles */
.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    position: relative;
    overflow: hidden;
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.btn-primary:hover::before {
    left: 100%;
}

/* Drop zone styles */
.drop-zone {
    border: 2px dashed #667eea;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.drop-zone::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: -1;
}

.drop-zone.dragover {
    border-color: #764ba2;
    background: rgba(102, 126, 234, 0.1);
    transform: scale(1.02);
}

.drop-zone.dragover::before {
    opacity: 0.1;
}

/* Progress bar animations */
.progress-bar {
    position: relative;
    overflow: hidden;
}

.progress-bar::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255, 255, 255, 0.3),
        transparent
    );
    transform: translateX(-100%);
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    100% {
        transform: translateX(100%);
    }
}

/* Card animations */
.card-entrance {
    animation: slide-in-up 0.6s ease-out;
    animation-fill-mode: both;
}

.card-entrance:nth-child(1) { animation-delay: 0.1s; }
.card-entrance:nth-child(2) { animation-delay: 0.2s; }
.card-entrance:nth-child(3) { animation-delay: 0.3s; }
.card-entrance:nth-child(4) { animation-delay: 0.4s; }

/* Keyword tags */
.keyword-tag {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    margin: 0.25rem;
    border-radius: 9999px;
    font-size: 0.875rem;
    font-weight: 500;
    transition: all 0.2s ease;
    cursor: default;
}

.keyword-tag.matched {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    color: white;
}

.keyword-tag.missing {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    color: white;
}

.keyword-tag:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

/* Loading states */
.loading-dots {
    display: inline-flex;
    gap: 0.25rem;
}

.loading-dot {
    width: 0.5rem;
    height: 0.5rem;
    border-radius: 50%;
    background: currentColor;
    animation: bounce 1.4s infinite ease-in-out both;
}

.loading-dot:nth-child(1) { animation-delay: -0.32s; }
.loading-dot:nth-child(2) { animation-delay: -0.16s; }

@keyframes bounce {
    0%, 80%, 100% {
        transform: scale(0);
    }
    40% {
        transform: scale(1);
    }
}

/* Toast notifications */
.toast-enter {
    animation: slide-in-up 0.3s ease-out;
}

.toast-exit {
    animation: slide-in-up 0.3s ease-out reverse;
}

/* Score animations */
.score-pop {
    animation: score-pop 0.6s ease-out;
}

@keyframes score-pop {
    0% {
        transform: scale(0.5);
        opacity: 0;
    }
    50% {
        transform: scale(1.1);
    }
    100% {
        transform: scale(1);
        opacity: 1;
    }
}

/* Responsive design */
@media (max-width: 768px) {
    .gradient-text {
        font-size: 2rem;
    }
    
    .card-entrance {
        animation-delay: 0s !important;
    }
}

/* Focus states for accessibility */
.focus-ring:focus {
    outline: 2px solid #667eea;
    outline-offset: 2px;
}

/* Dark mode toggle animation */
.theme-toggle {
    position: relative;
    width: 3rem;
    height: 1.5rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 9999px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.theme-toggle::after {
    content: '';
    position: absolute;
    top: 0.125rem;
    left: 0.125rem;
    width: 1.25rem;
    height: 1.25rem;
    background: white;
    border-radius: 50%;
    transition: all 0.3s ease;
}

.theme-toggle.active::after {
    transform: translateX(1.5rem);
}

/* Particle background effect */
.particles {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
}

.particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: rgba(255, 255, 255, 0.5);
    border-radius: 50%;
    animation: float-particle 20s infinite linear;
}

@keyframes float-particle {
    0% {
        transform: translateY(100vh) rotate(0deg);
        opacity: 0;
    }
    10% {
        opacity: 1;
    }
    90% {
        opacity: 1;
    }
    100% {
        transform: translateY(-100vh) rotate(360deg);
        opacity: 0;
    }
}

/* Custom animations for results */
.result-card {
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.6s ease;
}

.result-card.show {
    opacity: 1;
    transform: translateY(0);
}

/* Pulse animation for CTA buttons */
.cta-pulse {
    animation: cta-pulse 2s infinite;
}

@keyframes cta-pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(102, 126, 234, 0.7);
    }
    70% {
        box-shadow: 0 0 0 10px rgba(102, 126, 234, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(102, 126, 234, 0);
    }
}