/* 
 * Core Morphing Overlay Engine Styles
 * Ultimate FLIP, Crossfade, and Article Longread Layouts.
 */

.morph-full-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: 2000;
    pointer-events: none;
    background-color: rgba(0, 0, 0, 0);
    transition: background-color 0.5s ease;
    overflow-y: auto;
    scrollbar-gutter: stable;
}

.morph-full-overlay.is-active {
    pointer-events: auto;
    background-color: rgba(0, 0, 0, 0.95);
    backdrop-filter: blur(8px);
}

/* Universal Back Button */
.morph-close-btn {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 3000;
    background: rgba(0, 0, 0, 0.7);
    border: 1px solid var(--color-border-subtle);
    color: #fff;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.morph-close-btn:hover {
    border-color: var(--color-accent-brand);
    color: var(--color-accent-brand);
    transform: rotate(90deg);
}

/* ==========================================================
   CROSSFADE CARD ENGINE (PC Specs)
   ========================================================== */
.morph-anim-box {
    position: fixed;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border-subtle);
    border-radius: var(--radius-strict);
    overflow: hidden;
    will-change: top, left, width, height;
    z-index: 2010;
    opacity: 0;
    pointer-events: none;
    box-sizing: border-box;
    box-shadow: 0 30px 60px rgba(0,0,0,0.8);
}

.morph-anim-box.is-animating,
.morph-anim-box.is-expanded {
    opacity: 1;
    pointer-events: auto;
}

.pc-clone-layer {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    padding: 2rem;
    pointer-events: none;
    will-change: opacity;
}

.pc-clone-layer .build-price { margin-bottom: 1rem; }
.pc-clone-layer .feature-list { margin-top: 1.5rem; flex-grow: 1; }

.pc-detail-layer {
    position: absolute;
    inset: 0;
    padding: 3rem;
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    opacity: 0;
    pointer-events: none;
    will-change: opacity;
}

.pc-detail-layer.is-active {
    pointer-events: auto;
}

.pc-detail-layer::-webkit-scrollbar { width: 4px; }
.pc-detail-layer::-webkit-scrollbar-thumb { background: var(--color-accent-brand); }


/* ==========================================================
   MEDIA ENGINE & LONGREAD (Course Video & Article)
   ========================================================== */
.morph-media-box {
    background: #000;
    box-shadow: 0 20px 60px rgba(0, 255, 102, 0.15);
    border-radius: var(--radius-soft);
    border: 1px solid var(--color-border-subtle);
    overflow: hidden;
    will-change: top, left, width, height;
    opacity: 0;
}

.morph-media-box.is-animating {
    position: fixed;
    z-index: 2010;
    opacity: 1;
}

.morph-media-box.is-expanded {
    opacity: 1;
}

.morph-media-box video, 
.morph-media-box img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

/* Article Container flow */
.article-container {
    max-width: 1000px;
    margin: 80px auto;
    padding: 0 20px;
    width: 100%;
    display: none;
}

.course-article-content {
    margin-top: 3.5rem;
    opacity: 0;
    transform: translateY(30px);
}

.article-grid {
    display: grid;
    grid-template-columns: 1.5fr 1.1fr;
    gap: 4rem;
    align-items: flex-start;
    margin-top: 2rem;
}

@media (max-width: 992px) {
    .article-grid {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
}