/* ============================================================
   Premium animation layer — additive only.
   Background blobs, preloader, scroll-to-top, ripple,
   card tilt/shine/zoom, animated timeline, social bounce.
   All hardware-accelerated (transform / opacity).
   ============================================================ */

/* ---------- animated background blobs ---------- */
#bg-blobs {
    position: fixed;
    inset: 0;
    z-index: -1;
    overflow: hidden;
    pointer-events: none;
}

#bg-blobs span {
    position: absolute;
    border-radius: 50%;
    filter: blur(70px);
    opacity: 0.55;
    will-change: transform;
}

#bg-blobs .blob-1 {
    width: 42vw;
    height: 42vw;
    top: -8vw;
    left: -6vw;
    background: radial-gradient(circle at 30% 30%, var(--accent), transparent 70%);
    animation: blob-drift-1 22s ease-in-out infinite;
}

#bg-blobs .blob-2 {
    width: 38vw;
    height: 38vw;
    bottom: -10vw;
    right: -8vw;
    background: radial-gradient(circle at 60% 40%, #7c5cff, transparent 70%);
    animation: blob-drift-2 26s ease-in-out infinite;
}

#bg-blobs .blob-3 {
    width: 30vw;
    height: 30vw;
    top: 40%;
    left: 55%;
    background: radial-gradient(circle at 50% 50%, #22d3ee, transparent 70%);
    animation: blob-drift-3 30s ease-in-out infinite;
    opacity: 0.4;
}

:root[data-theme="dark"] #bg-blobs span {
    opacity: 0.28;
}

:root[data-theme="dark"] #bg-blobs .blob-3 {
    opacity: 0.22;
}

@keyframes blob-drift-1 {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(6vw, 5vw) scale(1.12); }
}

@keyframes blob-drift-2 {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(-7vw, -4vw) scale(1.08); }
}

@keyframes blob-drift-3 {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(-5vw, 4vw) scale(1.1); }
    66% { transform: translate(4vw, -5vw) scale(0.95); }
}

/* ---------- preloader ---------- */
#preloader {
    position: fixed;
    inset: 0;
    z-index: 3000;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-color);
    transition: opacity 0.6s var(--ease), visibility 0.6s var(--ease);
}

#preloader.hidden {
    opacity: 0;
    visibility: hidden;
}

.loader-ring {
    width: 58px;
    height: 58px;
    border-radius: 50%;
    border: 3px solid var(--border);
    border-top-color: var(--accent);
    border-right-color: var(--accent);
    animation: loader-spin 0.9s linear infinite;
}

.loader-mark {
    position: absolute;
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--accent);
    letter-spacing: 1px;
    animation: loader-pulse 1.4s ease-in-out infinite;
}

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

@keyframes loader-pulse {
    0%, 100% { opacity: 0.55; transform: scale(0.94); }
    50% { opacity: 1; transform: scale(1.06); }
}

/* ---------- scroll-to-top button ---------- */
#scroll-top {
    position: fixed;
    right: 26px;
    bottom: 26px;
    z-index: 1500;
    width: 46px;
    height: 46px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border-strong);
    border-radius: 50%;
    color: #fff;
    background: linear-gradient(135deg, var(--accent-strong), var(--accent));
    box-shadow: 0 8px 22px var(--accent-glow);
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transform: translateY(16px) scale(0.85);
    transition: opacity 0.35s var(--ease), transform 0.35s var(--ease), visibility 0.35s var(--ease);
}

#scroll-top.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
}

#scroll-top:hover {
    transform: translateY(-4px) scale(1.08);
    box-shadow: 0 14px 30px var(--accent-glow);
}

#scroll-top svg {
    width: 20px;
    height: 20px;
}

/* ---------- ripple (buttons) ---------- */
.btn,
.nav-link button,
#resume-button-1,
.project-github-link>button,
.project-deployed-link>button,
.social-pill,
#scroll-top {
    position: relative;
    overflow: hidden;
}

.ripple {
    position: absolute;
    border-radius: 50%;
    transform: scale(0);
    background: rgba(255, 255, 255, 0.5);
    pointer-events: none;
    animation: ripple-out 0.6s ease-out;
}

@keyframes ripple-out {
    to { transform: scale(2.6); opacity: 0; }
}

/* ---------- project card: tilt + shine + image zoom ---------- */
.project-card {
    transform-style: preserve-3d;
}

.project-card>img {
    transition: transform 0.5s var(--ease);
}

.project-card:hover>img {
    transform: scale(1.06);
}

/* shine sweep across the whole card on hover */
.project-card::before {
    content: "";
    position: absolute;
    top: 0;
    left: -75%;
    width: 50%;
    height: 100%;
    background: linear-gradient(120deg, transparent, rgba(255, 255, 255, 0.14), transparent);
    transform: skewX(-20deg);
    transition: left 0.7s var(--ease);
    pointer-events: none;
    z-index: 2;
}

.project-card:hover::before {
    left: 130%;
}

:root[data-theme="light"] .project-card::before {
    background: linear-gradient(120deg, transparent, rgba(47, 127, 224, 0.10), transparent);
}

/* ---------- animated timeline line (experience) ---------- */
.timeline {
    position: relative;
}

.exp-card {
    position: relative;
    overflow: hidden;
}

/* soft glow that sweeps up the accent border on hover */
.exp-card::after {
    content: "";
    position: absolute;
    left: 0;
    top: 0;
    width: 3px;
    height: 100%;
    background: linear-gradient(180deg, transparent, var(--accent), transparent);
    transform: translateY(-100%);
    transition: transform 0.6s var(--ease);
}

.exp-card:hover::after {
    transform: translateY(100%);
}

/* ---------- skill icon spin-in accent + hover glow ---------- */
.skills-card:hover {
    box-shadow: 0 14px 36px var(--accent-glow);
}

.skills-card:hover .skills-icon {
    box-shadow: 0 0 0 2px var(--accent), var(--shadow-md);
}

/* ---------- social icon bounce ---------- */
.social-pill svg {
    transition: transform 0.3s var(--ease);
}

.social-pill:hover svg {
    animation: icon-bounce 0.6s var(--ease);
}

@keyframes icon-bounce {
    0% { transform: translateY(0); }
    30% { transform: translateY(-6px) scale(1.15); }
    60% { transform: translateY(2px) scale(0.96); }
    100% { transform: translateY(0) scale(1); }
}

/* ---------- theme toggle rotate feedback ---------- */
.theme-toggle:active {
    transform: rotate(180deg) scale(0.9);
}

/* ---------- reduced motion: disable decorative motion ---------- */
@media (prefers-reduced-motion: reduce) {
    #bg-blobs span,
    .loader-ring,
    .loader-mark {
        animation: none !important;
    }

    .project-card::before,
    .exp-card::after,
    .social-pill:hover svg {
        transition: none !important;
        animation: none !important;
    }
}