/* 03 — MOTION STACK : ANIMATIONS */

/* SCROLL REVEAL */
.fade-in-up { opacity: 0; transform: translateY(28px); transition: opacity 0.7s ease-out, transform 0.7s ease-out; }
.fade-in-up.visible { opacity: 1; transform: translateY(0); }
.delay-1 { transition-delay: 0.15s; }
.delay-2 { transition-delay: 0.3s; }
.delay-3 { transition-delay: 0.45s; }

/* PAGE TRANSITION */
body { animation: pageIn 0.45s ease-out; }
@keyframes pageIn {
    from { opacity: 0; transform: translateY(16px); }
    to { opacity: 1; transform: translateY(0); }
}

/* PROJECT CARD STAGGER */
.project-card { opacity: 0; transform: translateY(20px); transition: opacity 0.5s ease, transform 0.5s ease, border-color 0.2s, box-shadow 0.3s; }
.project-card.visible { opacity: 1; transform: translateY(0); }

/* SKILL BAR ANIMATION */
.skill-bar-fill { width: 0; transition: width 1.5s cubic-bezier(0.25, 0.8, 0.25, 1); }

/* NAV UNDERLINE */
.nav-link { position: relative; }
.nav-link::after { content: ''; position: absolute; bottom: 0; left: 50%; width: 0; height: 2px; background: var(--accent-primary); transition: width 0.3s, left 0.3s; }
.nav-link:hover::after, .nav-link.active::after { width: 80%; left: 10%; }

/* ==========================================
   HERO MORPHING TEXT
   ========================================== */
.morph-text {
    display: inline-block;
    position: relative;
    filter: blur(0);
    transition: filter 0.4s ease;
}
.morph-text.morphing {
    filter: blur(6px);
    opacity: 0.6;
}

/* ==========================================
   TECH STACK MARQUEE
   ========================================== */
.tech-marquee-section { overflow: hidden; }
.marquee-track {
    width: 100%;
    overflow: hidden;
    mask-image: linear-gradient(to right, transparent, black 5%, black 95%, transparent);
    -webkit-mask-image: linear-gradient(to right, transparent, black 5%, black 95%, transparent);
}
.marquee-content {
    display: flex;
    gap: 24px;
    width: max-content;
    animation: marquee-scroll var(--marquee-speed, 30s) linear infinite;
}
.marquee-content:hover { animation-play-state: paused; }
.marquee-content.paused { animation-play-state: paused; }
@keyframes marquee-scroll {
    from { transform: translateX(0); }
    to { transform: translateX(-50%); }
}
.marquee-item {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 22px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 30px;
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-primary);
    white-space: nowrap;
    transition: border-color 0.3s, box-shadow 0.3s, transform 0.3s;
    user-select: none;
}
.marquee-item:hover {
    border-color: var(--accent-primary);
    box-shadow: 0 0 20px rgba(124, 58, 237, 0.25);
    transform: translateY(-2px);
}

/* ==========================================
   3D CARD STACK SCROLL
   ========================================== */
.card-stack-container {
    perspective: 1200px;
    position: relative;
}
.card-stack-container .project-card {
    transform-origin: center bottom;
    backface-visibility: hidden;
    will-change: transform;
}

/* ==========================================
   GRADIENT MESH BLOBS
   ========================================== */
.gradient-blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    mix-blend-mode: screen;
    pointer-events: none;
    will-change: transform;
    opacity: 0;
    transition: opacity 1.5s ease;
}
.gradient-blob.active { opacity: 0.6; }

/* ==========================================
   LOADING SPINNER
   ========================================== */
#loading-spinner {
    position: fixed; top: 56px; left: 0; right: 0; bottom: 0; z-index: 99999;
    display: flex; align-items: center; justify-content: center;
    background: var(--bg-primary, #08090A);
    transition: opacity 0.5s ease, visibility 0.5s ease;
 pointer-events: none; }
#loading-spinner.hidden { opacity: 0; visibility: hidden; pointer-events: none; }
.spinner {
    width: 36px; height: 36px;
    border: 3px solid var(--border-color, #27272A);
    border-top-color: var(--accent-primary, #7C3AED);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* =========================================
   KADRE LOADER ANIMATION
   ========================================= */
#loading-spinner {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background: var(--bg-primary, #0D1117);
    z-index: 99999;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

#loading-spinner.hidden {
    opacity: 0;
    visibility: hidden;
}

.loader-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
}

.loader-text {
    font-size: 3rem;
    font-weight: 800;
    display: flex;
    overflow: hidden;
    color: var(--accent-primary, #58A6FF);
    font-family: var(--font-family, 'Inter', sans-serif);
}

.loader-text span {
    display: inline-block;
    transform: translateY(100%);
    animation: riseUp 0.6s cubic-bezier(0.2, 0.8, 0.2, 1) forwards;
}

.loader-by {
    font-size: 0.8rem;
    letter-spacing: 3px;
    opacity: 0.6;
    color: var(--text-primary, #E6EDF3);
    text-transform: uppercase;
    font-family: var(--font-family, 'Inter', sans-serif);
}

.footer-vouh {
    font-weight: bold;
    color: var(--accent-primary, #58A6FF);
    margin-left: 5px;
}

@keyframes riseUp {
    to { transform: translateY(0); }
}

/* ==========================================================================
   ACCESSIBILITY: REDUCED MOTION (WCAG)
   ========================================================================== */
@media (prefers-reduced-motion: reduce) {
  *, ::before, ::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  canvas {
    opacity: 0.1 !important;
    pointer-events: none !important;
  }
}