/* Smooth scrolling */
html {
    scroll-behavior: smooth;
}

/* Loading animation overlay */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, #1f2937 0%, #111827 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity 0.5s ease-out;
}

.loading-overlay.fade-out {
    opacity: 0;
    pointer-events: none;
}

/* Spinner */
.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid rgba(37, 99, 235, 0.2);
    border-top-color: #2563eb;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Gradient text */
.gradient-text {
    background: linear-gradient(135deg, #2563eb 0%, #7c3aed 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Custom scrollbar */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

.dark ::-webkit-scrollbar-track {
    background: #1f2937;
}

::-webkit-scrollbar-thumb {
    background: #2563eb;
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: #7c3aed;
}

/* Scroll reveal animations */
.scroll-reveal {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.4s ease-out, transform 0.4s ease-out;
}

.scroll-reveal.revealed {
    opacity: 1;
    transform: translateY(0);
}

/* Button styles using Tailwind @apply */
.btn-primary {
    @apply px-6 py-3 bg-primary text-white rounded-lg font-semibold
           hover:bg-blue-700 transition-all shadow-lg hover:shadow-xl
           hover:scale-105 active:scale-95;
}

.btn-secondary {
    @apply px-6 py-3 bg-transparent border-2 border-primary text-primary
           rounded-lg font-semibold hover:bg-primary hover:text-white
           transition-all shadow-lg hover:shadow-xl hover:scale-105 active:scale-95;
}

/* Dark mode button styles */
.dark .btn-secondary {
    @apply border-blue-400 text-blue-400 hover:bg-blue-400 hover:text-gray-900;
}

/* Timeline animations */
.timeline-line {
    height: 0;
    transition: height 0.8s ease-out;
}

.timeline-line.active {
    height: 100%;
}

.timeline-dot {
    transform: scale(0);
    transition: transform 0.5s ease-out;
}

.timeline-dot.active {
    transform: scale(1);
}

.timeline-dot::before {
    content: '';
    position: absolute;
    inset: -8px;
    border-radius: 50%;
    background: currentColor;
    opacity: 0;
    animation: pulse-ring 2s ease-out infinite;
}

.timeline-dot.active::before {
    opacity: 0.3;
}

@keyframes pulse-ring {
    0% {
        transform: scale(0.8);
        opacity: 0.3;
    }
    50% {
        transform: scale(1.2);
        opacity: 0.1;
    }
    100% {
        transform: scale(1.4);
        opacity: 0;
    }
}