/* Custom Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    overflow-x: hidden;
}

/* Custom Animations */
@keyframes fade-in-down {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fade-in-up {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse-slow {
    0%, 100% {
        opacity: 0.2;
    }
    50% {
        opacity: 0.4;
    }
}

.animate-fade-in-down {
    animation: fade-in-down 1s ease-out;
}

.animate-fade-in-up {
    animation: fade-in-up 1s ease-out 0.2s both;
}

.animate-pulse-slow {
    animation: pulse-slow 4s ease-in-out infinite;
}

/* Navigation Active State */
.nav-link {
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(to right, #3b82f6, #9333ea);
    transition: width 0.3s ease;
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

/* Smooth Scroll Offset for Fixed Nav */
section {
    scroll-margin-top: 80px;
}

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

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

::-webkit-scrollbar-thumb {
    background: linear-gradient(to bottom, #3b82f6, #9333ea);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(to bottom, #2563eb, #7c3aed);
}

/* Loading Animation */
@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.fa-spin {
    animation: spin 1s linear infinite;
}

/* Form Validation States */
input:invalid:not(:placeholder-shown),
textarea:invalid:not(:placeholder-shown) {
    border-color: #ef4444;
}

input:valid:not(:placeholder-shown),
textarea:valid:not(:placeholder-shown) {
    border-color: #10b981;
}

/* Gradient Text */
.gradient-text {
    background: linear-gradient(to right, #3b82f6, #9333ea);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Project Cards Hover Effect */
.project-card {
    transition: all 0.3s ease;
}

.project-card:hover {
    transform: translateY(-10px);
}

/* Skill Cards Animation */
@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

/* Button Ripple Effect */
button {
    position: relative;
    overflow: hidden;
}

button::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

button:active::before {
    width: 300px;
    height: 300px;
}

/* Responsive Design Adjustments */
@media (max-width: 768px) {
    .text-5xl {
        font-size: 2.5rem;
    }
    
    .text-7xl {
        font-size: 3.5rem;
    }
}

/* Loading Spinner for Form */
.spinner {
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-top: 3px solid white;
    border-radius: 50%;
    width: 20px;
    height: 20px;
    animation: spin 1s linear infinite;
}

/* Success and Error Messages */
.success-message {
    background-color: rgba(16, 185, 129, 0.1);
    border: 1px solid #10b981;
    color: #10b981;
    padding: 1rem;
    border-radius: 0.5rem;
    margin-top: 1rem;
}

.error-message {
    background-color: rgba(239, 68, 68, 0.1);
    border: 1px solid #ef4444;
    color: #ef4444;
    padding: 1rem;
    border-radius: 0.5rem;
    margin-top: 1rem;
}

/* Particle Background Effect (Optional) */
.particle {
    position: absolute;
    border-radius: 50%;
    pointer-events: none;
}

/* Smooth Transitions */
* {
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

/* Hide elements until ready */
.fade-in-element {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in-element.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Scroll Progress Bar */
#scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    height: 3px;
    background: linear-gradient(to right, #3b82f6, #9333ea);
    z-index: 9999;
    transition: width 0.1s ease;
}