/* Scroll Animation Styles */

/* Base animation states */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.animate-on-scroll.animated {
    opacity: 1;
    transform: translateY(0);
}

/* Fade in from left */
.fade-in-left {
    opacity: 0;
    transform: translateX(-50px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.fade-in-left.animated {
    opacity: 1;
    transform: translateX(0);
}

/* Fade in from right */
.fade-in-right {
    opacity: 0;
    transform: translateX(50px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.fade-in-right.animated {
    opacity: 1;
    transform: translateX(0);
}

/* Scale up animation */
.scale-in {
    opacity: 0;
    transform: scale(0.9);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.scale-in.animated {
    opacity: 1;
    transform: scale(1);
}

/* Stagger delay for multiple items */
.animate-on-scroll:nth-child(1) { transition-delay: 0.1s; }
.animate-on-scroll:nth-child(2) { transition-delay: 0.2s; }
.animate-on-scroll:nth-child(3) { transition-delay: 0.3s; }
.animate-on-scroll:nth-child(4) { transition-delay: 0.4s; }
.animate-on-scroll:nth-child(5) { transition-delay: 0.5s; }
.animate-on-scroll:nth-child(6) { transition-delay: 0.6s; }

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

/* Enhanced header animations */
header {
    position: relative;
    overflow: hidden;
}

header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(44, 62, 80, 0.95) 0%, rgba(52, 73, 94, 0.95) 100%);
    z-index: 0;
}

header .container {
    position: relative;
    z-index: 1;
}

/* Profile image animation */
header .img-circle {
    transition: transform 0.5s ease, box-shadow 0.5s ease;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

header .img-circle:hover {
    transform: scale(1.05) rotate(2deg);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.4);
}

/* Social buttons enhanced animation */
.btn-social {
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.btn-social::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 0.3s ease, height 0.3s ease;
}

.btn-social:hover::before {
    width: 100%;
    height: 100%;
}

.btn-social:hover {
    transform: translateY(-3px) scale(1.1);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
}

/* Section title animations */
section h2 {
    position: relative;
    display: inline-block;
    padding-bottom: 15px;
}

section h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 3px;
    background: linear-gradient(90deg, #18bc9c, #2c3e50);
    transition: width 0.6s ease;
}

section h2.animated::after {
    width: 80%;
}

/* Project/Publication item hover effects */
.row:has(.project-thumb) {
    transition: all 0.4s ease;
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 10px;
}

.row:has(.project-thumb):hover {
    background: rgba(24, 188, 156, 0.05);
    transform: translateX(10px);
    box-shadow: -5px 0 0 #18bc9c;
}

.row:has(.publication-thumb) {
    transition: all 0.4s ease;
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 10px;
}

.row:has(.publication-thumb):hover {
    background: rgba(44, 62, 80, 0.05);
    transform: translateX(10px);
    box-shadow: -5px 0 0 #2c3e50;
}

/* Image zoom on hover */
.project-thumb, .publication-thumb, .internship-logo {
    transition: transform 0.4s ease, filter 0.4s ease;
    filter: grayscale(0%);
}

.project-thumb:hover, .publication-thumb:hover {
    transform: scale(1.08);
    filter: brightness(1.1);
}

.internship-logo:hover {
    transform: scale(1.6);
}

/* Navbar scroll effect enhancement */
.navbar {
    transition: all 0.4s ease;
}

.navbar-shrink {
    background: rgba(44, 62, 80, 0.98) !important;
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.1);
}

/* Section transitions */
section {
    position: relative;
    transition: all 0.3s ease;
}

section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, rgba(24, 188, 156, 0.3), transparent);
    opacity: 0;
    transition: opacity 0.5s ease;
}

section:hover::before {
    opacity: 1;
}

/* News items animation */
.about_me ul li {
    transition: all 0.3s ease;
    padding-left: 10px;
    border-left: 3px solid transparent;
}

.about_me ul li:hover {
    padding-left: 20px;
    border-left-color: #18bc9c;
    background: rgba(24, 188, 156, 0.05);
}

/* Link hover effects */
a {
    transition: color 0.3s ease, transform 0.2s ease;
    display: inline-block;
}

section a:not(.btn-social):not(.btn):hover {
    color: #18bc9c !important;
    transform: translateX(2px);
}

/* HR dividers animation */
hr {
    opacity: 0.3;
    transition: opacity 0.5s ease, transform 0.5s ease;
}

hr:hover {
    opacity: 1;
    transform: scaleX(1.02);
}

/* Skill tags and buttons */
.publ li {
    transition: all 0.3s ease;
    border-radius: 3px;
}

.publ li:hover {
    background: #2c3e50;
    border-color: #2c3e50;
    transform: translateY(-2px);
    box-shadow: 0 3px 8px rgba(0, 0, 0, 0.2);
}

.publ li:hover a {
    color: white !important;
}

/* Success section link styling */
section.success a {
    position: relative;
}

section.success a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: #2c3e50;
    transition: width 0.3s ease;
}

section.success a:hover::after {
    width: 100%;
}

/* Contact section social icons */
.social-dark-bg {
    transition: all 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

.social-dark-bg:hover {
    transform: translateY(-5px) rotate(5deg) scale(1.1);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
}

/* Responsive animations - reduce on mobile */
@media (max-width: 768px) {
    .animate-on-scroll,
    .fade-in-left,
    .fade-in-right,
    .scale-in {
        opacity: 1;
        transform: none;
    }
    
    .row:has(.project-thumb):hover,
    .row:has(.publication-thumb):hover {
        transform: none;
    }
}

/* Subtle pulse animation for important elements */
@keyframes subtle-pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.02);
    }
}

/* Gradient text animation */
@keyframes gradient-shift {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}

.intro-text .name {
    background: linear-gradient(45deg, #fff, #18bc9c, #fff, #18bc9c);
    background-size: 300% 300%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: gradient-shift 8s ease infinite;
}

/* Loading state for images */
img {
    transition: opacity 0.3s ease;
}

img:not([src]) {
    opacity: 0;
}

/* Smooth opacity transitions */
.about_me p,
.pubt,
.puba,
.pubv {
    transition: opacity 0.3s ease;
}

section:hover .about_me p,
section:hover .pubt {
    opacity: 0.95;
}