/* ===================================
   Animations & Transitions
   =================================== */

/* ---------- Fade-in on scroll (IntersectionObserver) ---------- */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1),
                transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

.reveal-left {
    opacity: 0;
    transform: translateX(-40px);
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1),
                transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal-left.visible {
    opacity: 1;
    transform: translateX(0);
}

.reveal-right {
    opacity: 0;
    transform: translateX(40px);
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1),
                transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal-right.visible {
    opacity: 1;
    transform: translateX(0);
}

.reveal-scale {
    opacity: 0;
    transform: scale(0.9);
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1),
                transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal-scale.visible {
    opacity: 1;
    transform: scale(1);
}

/* Stagger children */
.stagger-children > *:nth-child(1) { transition-delay: 0s; }
.stagger-children > *:nth-child(2) { transition-delay: 0.1s; }
.stagger-children > *:nth-child(3) { transition-delay: 0.2s; }
.stagger-children > *:nth-child(4) { transition-delay: 0.3s; }
.stagger-children > *:nth-child(5) { transition-delay: 0.4s; }
.stagger-children > *:nth-child(6) { transition-delay: 0.5s; }

/* ---------- Hero entry animations ---------- */
.animate-fade-up {
    opacity: 0;
    transform: translateY(30px);
    animation: fadeUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.delay-1 { animation-delay: 0.15s; }
.delay-2 { animation-delay: 0.3s; }
.delay-3 { animation-delay: 0.45s; }
.delay-4 { animation-delay: 0.6s; }
.delay-5 { animation-delay: 0.75s; }

@keyframes fadeUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ---------- Glow pulse for cards ---------- */
@keyframes glowPulse {
    0%, 100% {
        box-shadow: 0 0 20px rgba(108, 92, 231, 0.05);
    }
    50% {
        box-shadow: 0 0 40px rgba(108, 92, 231, 0.15),
                    0 0 80px rgba(108, 92, 231, 0.05);
    }
}

.glow-pulse {
    animation: glowPulse 4s ease-in-out infinite;
}

/* ---------- Gradient border animation ---------- */
@keyframes gradientRotate {
    0% { --angle: 0deg; }
    100% { --angle: 360deg; }
}

@property --angle {
    syntax: "<angle>";
    initial-value: 0deg;
    inherits: false;
}

.gradient-border {
    position: relative;
}

.gradient-border::before {
    content: '';
    position: absolute;
    inset: -2px;
    border-radius: inherit;
    background: conic-gradient(from var(--angle), var(--accent-1), var(--accent-2), var(--accent-3), var(--accent-1));
    z-index: -1;
    animation: gradientRotate 4s linear infinite;
    opacity: 0;
    transition: opacity 0.4s;
}

.gradient-border:hover::before {
    opacity: 1;
}

/* ---------- Floating animation ---------- */
@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-12px); }
}

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

/* ---------- Shimmer / loading effect ---------- */
@keyframes shimmer {
    0% {
        background-position: -200% 0;
    }
    100% {
        background-position: 200% 0;
    }
}

.shimmer {
    background: linear-gradient(
        90deg,
        transparent 0%,
        rgba(108, 92, 231, 0.08) 50%,
        transparent 100%
    );
    background-size: 200% 100%;
    animation: shimmer 3s ease-in-out infinite;
}

/* ---------- Text reveal ---------- */
@keyframes textReveal {
    0% {
        clip-path: inset(0 100% 0 0);
    }
    100% {
        clip-path: inset(0 0 0 0);
    }
}

.text-reveal {
    animation: textReveal 1s cubic-bezier(0.77, 0, 0.175, 1) forwards;
}

/* ---------- Skill tag hover ripple ---------- */
.skill-tag {
    position: relative;
    overflow: hidden;
}

.skill-tag::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(108, 92, 231, 0.2);
    transform: translate(-50%, -50%);
    transition: width 0.5s, height 0.5s;
}

.skill-tag:hover::after {
    width: 200px;
    height: 200px;
}

/* ---------- Blog card hover line ---------- */
.blog-card::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 3px;
    background: var(--accent-gradient);
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
    transition: width 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.blog-card:hover::after {
    width: 100%;
}

/* ---------- Magnetic button effect (via JS) ---------- */
.btn {
    transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94),
                box-shadow 0.3s ease;
}

/* ---------- Navbar link underline ---------- */
.nav-link::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--accent-gradient);
    border-radius: 2px;
    transition: width 0.3s, left 0.3s;
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 60%;
    left: 20%;
}

/* ---------- Page transitions ---------- */
.page-transition-overlay {
    position: fixed;
    inset: 0;
    background: var(--bg-primary);
    z-index: 10000;
    transform: scaleY(0);
    transform-origin: bottom;
    transition: transform 0.6s cubic-bezier(0.77, 0, 0.175, 1);
}

.page-transition-overlay.active {
    transform: scaleY(1);
    transform-origin: top;
}

/* ---------- Smooth image loading ---------- */
.lazy-image {
    opacity: 0;
    transition: opacity 0.6s ease;
}

.lazy-image.loaded {
    opacity: 1;
}

/* ---------- Reduced motion preference ---------- */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    .reveal,
    .reveal-left,
    .reveal-right,
    .reveal-scale,
    .animate-fade-up {
        opacity: 1;
        transform: none;
    }
}