/* ===== SKILLS UNIVERSE ===== */
.skills-universe {
    position: relative;
    min-height: 200vh;
    padding: 120px 40px 160px;
    background: var(--bg-primary);
    overflow: hidden;
}

/* ---- BG Canvas ---- */
#skills-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: 0;
    pointer-events: none;
}

/* ---- Section Header ---- */
.skills-header {
    position: relative;
    z-index: 2;
    text-align: center;
    margin-bottom: 80px;
}

.skills-header .bg-title {
    position: absolute;
    top: -60px;
    left: 50%;
    transform: translateX(-50%);
    font-size: clamp(8rem, 20vw, 18rem);
    font-weight: 900;
    color: transparent;
    -webkit-text-stroke: 2px rgba(124,58,237,0.08);
    text-stroke: 2px rgba(124,58,237,0.08);
    letter-spacing: 0.1em;
    pointer-events: none;
    user-select: none;
    white-space: nowrap;
    animation: bgTitlePulse 4s ease-in-out infinite;
}

@keyframes bgTitlePulse {
    0%, 100% { -webkit-text-stroke-color: rgba(124,58,237,0.08); }
    50% { -webkit-text-stroke-color: rgba(124,58,237,0.15); }
}

.skills-header h2 {
    font-size: clamp(2.5rem, 6vw, 5rem);
    font-weight: 900;
    letter-spacing: 4px;
    text-transform: uppercase;
    background: linear-gradient(135deg, #fff 0%, #7c3aed 40%, #06b6d4 70%, #ec4899 100%);
    -webkit-text-fill-color: transparent;
    background-clip: text;
    -webkit-background-clip: text;
    position: relative;
    z-index: 1;
    line-height: 1.1;
}

.skills-header .subtitle {
    font-size: clamp(0.85rem, 1.4vw, 1.1rem);
    color: var(--text-secondary);
    letter-spacing: 6px;
    text-transform: uppercase;
    margin-top: 16px;
    font-weight: 400;
}

.skills-header .subtitle span {
    display: inline-block;
    background: linear-gradient(90deg, #7c3aed, #06b6d4);
    -webkit-text-fill-color: transparent;
    background-clip: text;
    -webkit-background-clip: text;
    font-weight: 600;
}

/* ---- Search Bar ---- */
.skills-search {
    position: relative;
    z-index: 2;
    max-width: 520px;
    margin: 40px auto 60px;
}

.search-wrap {
    position: relative;
    display: flex;
    align-items: center;
    background: rgba(19,28,49,0.6);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(124,58,237,0.2);
    border-radius: 16px;
    padding: 4px;
    transition: all 0.4s ease;
    box-shadow: 0 0 30px rgba(124,58,237,0.05);
}

.search-wrap:focus-within {
    border-color: rgba(124,58,237,0.6);
    box-shadow: 0 0 40px rgba(124,58,237,0.15), inset 0 0 30px rgba(124,58,237,0.03);
}

.search-wrap .search-icon {
    flex-shrink: 0;
    width: 20px;
    height: 20px;
    margin-left: 18px;
    color: rgba(255,255,255,0.3);
}

.search-wrap input {
    flex: 1;
    background: none;
    border: none;
    outline: none;
    padding: 16px 18px;
    font-size: 0.9rem;
    color: #fff;
    font-family: inherit;
    letter-spacing: 0.5px;
}

.search-wrap input::placeholder {
    color: rgba(255,255,255,0.2);
    letter-spacing: 1px;
    text-transform: uppercase;
    font-size: 0.7rem;
}

.search-scan-line {
    position: absolute;
    left: 0;
    width: 100%;
    height: 1px;
    background: linear-gradient(90deg, transparent, #7c3aed, #06b6d4, transparent);
    opacity: 0;
    transition: opacity 0.4s;
    pointer-events: none;
}

.search-wrap:focus-within .search-scan-line {
    opacity: 0.8;
    animation: scanLine 2s linear infinite;
}

@keyframes scanLine {
    0% { top: 0; }
    100% { top: 100%; }
}

/* ---- Tiles Wall ---- */
.skills-wall {
    position: relative;
    z-index: 1;
    max-width: 1400px;
    margin: 0 auto;
}

.wall-grid {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: 12px;
    perspective: 2000px;
}

/* ---- Depth Layers (grid children) ---- */
.depth-layer {
    transform-style: preserve-3d;
    will-change: transform;
}

.depth-layer.size-sm { grid-column: span 2; grid-row: span 1; }
.depth-layer.size-md { grid-column: span 3; grid-row: span 1; }
.depth-layer.size-lg { grid-column: span 4; grid-row: span 1; }
.depth-layer.size-xl { grid-column: span 3; grid-row: span 2; }
.depth-layer.size-hero { grid-column: span 4; grid-row: span 2; }

/* ---- Skill Tile ---- */
.skill-tile {
    position: relative;
    border-radius: 16px;
    overflow: hidden;
    cursor: pointer;
    transition: box-shadow 0.6s ease, border-color 0.6s ease;
    transform-style: preserve-3d;
    will-change: transform;
    background: rgba(19,28,49,0.4);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255,255,255,0.04);
    box-shadow: 0 4px 30px rgba(0,0,0,0.3);
    min-height: 120px;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 20px 16px;
    opacity: 0;
}

/* Tile inner */
.tile-inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 10px;
    width: 100%;
    height: 100%;
    position: relative;
    z-index: 1;
    transition: transform 0.5s cubic-bezier(0.34,1.56,0.64,1);
}

.tile-logo {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    font-size: 1.3rem;
    font-weight: 800;
    transition: all 0.5s cubic-bezier(0.34,1.56,0.64,1);
    position: relative;
    flex-shrink: 0;
}

.depth-layer.size-xl .tile-logo,
.depth-layer.size-hero .tile-logo {
    width: 64px;
    height: 64px;
    font-size: 1.8rem;
    border-radius: 16px;
}

.depth-layer.size-sm .tile-logo {
    width: 36px;
    height: 36px;
    font-size: 0.9rem;
    border-radius: 10px;
}

.tile-logo svg {
    width: 60%;
    height: 60%;
}

.tile-name {
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1.2px;
    color: rgba(255,255,255,0.85);
    text-align: center;
    line-height: 1.3;
    transition: all 0.4s ease;
}

.depth-layer.size-xl .tile-name,
.depth-layer.size-hero .tile-name {
    font-size: 0.85rem;
    letter-spacing: 1.8px;
}

.depth-layer.size-sm .tile-name {
    font-size: 0.55rem;
    letter-spacing: 0.8px;
}

.tile-category {
    font-size: 0.55rem;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: rgba(255,255,255,0.25);
    margin-top: 2px;
}

/* Tile neon border overlay */
.tile-border {
    position: absolute;
    inset: -1px;
    border-radius: 16px;
    opacity: 0;
    transition: opacity 0.5s ease;
    pointer-events: none;
    z-index: 0;
}

/* Tile glow */
.tile-glow {
    position: absolute;
    width: 200%;
    height: 200%;
    top: -50%;
    left: -50%;
    border-radius: 50%;
    opacity: 0;
    transition: opacity 0.6s ease;
    pointer-events: none;
    z-index: 0;
}

/* ---- Hover States (JS tilt handles transform) ---- */
.skill-tile.hover-active {
    border-color: rgba(124,58,237,0.3);
    box-shadow: 0 20px 60px rgba(124,58,237,0.2), 0 0 40px rgba(6,182,212,0.1);
}

.skill-tile.hover-active .tile-inner {
    transform: scale(1.08);
}

.skill-tile.hover-active .tile-logo {
    transform: scale(1.2) translateY(-4px);
}

.skill-tile.hover-active .tile-name {
    color: #fff;
    text-shadow: 0 0 20px rgba(124,58,237,0.3);
}

.skill-tile.hover-active .tile-border {
    opacity: 1;
}

.skill-tile.hover-active .tile-glow {
    opacity: 0.6;
}

/* ---- Magnetic proximity pre-glow ---- */
.skill-tile.magnetic {
    border-color: rgba(124,58,237,0.2);
    box-shadow: 0 0 40px rgba(124,58,237,0.1), 0 0 80px rgba(6,182,212,0.04);
}

.skill-tile.magnetic .tile-glow {
    opacity: 0.3 !important;
}

.skill-tile.magnetic .tile-logo {
    transform: scale(1.06);
}

/* ---- Entrance Animations ---- */
.skill-tile.entered {
    animation: tileEnter 0.8s cubic-bezier(0.34,1.56,0.64,1) forwards;
}

.skill-tile.entered[data-entrance="left"] { animation-name: tileFromLeft; }
.skill-tile.entered[data-entrance="right"] { animation-name: tileFromRight; }
.skill-tile.entered[data-entrance="bottom"] { animation-name: tileFromBottom; }
.skill-tile.entered[data-entrance="top"] { animation-name: tileFromTop; }
.skill-tile.entered[data-entrance="zoom"] { animation-name: tileFromZoom; }

@keyframes tileFromLeft {
    from { opacity: 0; transform: translateX(-120px) scale(0.8); }
    to { opacity: 1; transform: translateX(0) scale(1); }
}

@keyframes tileFromRight {
    from { opacity: 0; transform: translateX(120px) scale(0.8); }
    to { opacity: 1; transform: translateX(0) scale(1); }
}

@keyframes tileFromBottom {
    from { opacity: 0; transform: translateY(120px) scale(0.8); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

@keyframes tileFromTop {
    from { opacity: 0; transform: translateY(-120px) scale(0.8); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

@keyframes tileFromZoom {
    from { opacity: 0; transform: scale(0.3) translateZ(-200px); }
    to { opacity: 1; transform: scale(1) translateZ(0); }
}

/* ---- Floating animation on hover ---- */
.skill-tile.floating {
    animation: tileFloat 3s ease-in-out infinite;
}

@keyframes tileFloat {
    0%, 100% { transform: translateY(0) rotateX(0deg) rotateY(0deg); }
    25% { transform: translateY(-6px) rotateX(2deg) rotateY(-2deg); }
    50% { transform: translateY(-2px) rotateX(0deg) rotateY(0deg); }
    75% { transform: translateY(-8px) rotateX(-2deg) rotateY(2deg); }
}

/* ---- Info Panel ---- */
.skills-info-panel {
    position: fixed;
    right: -400px;
    top: 50%;
    transform: translateY(-50%);
    width: 360px;
    max-height: 70vh;
    background: rgba(19,28,49,0.85);
    backdrop-filter: blur(40px) saturate(1.4);
    -webkit-backdrop-filter: blur(40px) saturate(1.4);
    border: 1px solid rgba(124,58,237,0.15);
    border-right: none;
    border-radius: 20px 0 0 20px;
    padding: 40px 32px;
    z-index: 1000;
    transition: right 0.6s cubic-bezier(0.34,1.56,0.64,1), opacity 0.4s ease;
    opacity: 0;
    box-shadow: -20px 0 60px rgba(0,0,0,0.5), 0 0 40px rgba(124,58,237,0.05);
    overflow-y: auto;
}

.skills-info-panel.open {
    right: 0;
    opacity: 1;
}

.panel-close {
    position: absolute;
    top: 16px;
    right: 16px;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: 1px solid rgba(255,255,255,0.08);
    background: rgba(255,255,255,0.03);
    color: rgba(255,255,255,0.4);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s;
    font-size: 1rem;
}

.panel-close:hover {
    background: rgba(255,255,255,0.08);
    color: #fff;
}

.panel-logo {
    width: 72px;
    height: 72px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 20px;
    position: relative;
}

.panel-logo::after {
    content: '';
    position: absolute;
    inset: -4px;
    border-radius: 20px;
    border: 1px solid rgba(124,58,237,0.15);
    opacity: 0.5;
}

.panel-name {
    font-size: 1.4rem;
    font-weight: 800;
    letter-spacing: 2px;
    margin-bottom: 6px;
    color: #fff;
}

.panel-category {
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 3px;
    color: rgba(255,255,255,0.3);
    margin-bottom: 20px;
    display: block;
}

.panel-desc {
    font-size: 0.85rem;
    line-height: 1.8;
    color: rgba(255,255,255,0.65);
    margin-bottom: 24px;
}

.panel-stats {
    display: flex;
    gap: 20px;
    padding-top: 20px;
    border-top: 1px solid rgba(255,255,255,0.04);
}

.panel-stat {
    flex: 1;
}

.panel-stat-value {
    font-size: 1.3rem;
    font-weight: 800;
    background: linear-gradient(135deg, #7c3aed, #06b6d4);
    -webkit-text-fill-color: transparent;
    background-clip: text;
    -webkit-background-clip: text;
}

.panel-stat-label {
    font-size: 0.6rem;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: rgba(255,255,255,0.3);
    margin-top: 4px;
    display: block;
}

/* ---- Filter animation ---- */
.skill-tile.filter-hidden {
    opacity: 0 !important;
    transform: scale(0.6) translateY(20px) !important;
    pointer-events: none;
    transition: all 0.5s cubic-bezier(0.4,0,0.2,1);
}

.skill-tile.filter-match {
    box-shadow: 0 0 40px rgba(124,58,237,0.2), 0 0 80px rgba(6,182,212,0.08);
    border-color: rgba(124,58,237,0.3);
}

/* ---- Particle Burst ---- */
.particle-burst {
    position: absolute;
    pointer-events: none;
    z-index: 100;
}

.burst-particle {
    position: absolute;
    border-radius: 50%;
    pointer-events: none;
}

/* ---- Mobile ---- */
@media (max-width: 1024px) {
    .skills-universe { padding: 80px 20px 100px; }
    .wall-grid { gap: 10px; }
    .depth-layer.size-sm { grid-column: span 3; }
    .depth-layer.size-md { grid-column: span 4; }
    .depth-layer.size-lg { grid-column: span 6; }
    .depth-layer.size-xl { grid-column: span 4; grid-row: span 2; }
    .depth-layer.size-hero { grid-column: span 6; grid-row: span 2; }
    .skills-info-panel { width: 300px; right: -340px; }
    .skills-info-panel.open { right: 0; }
}

@media (max-width: 768px) {
    .skills-universe { padding: 60px 16px 80px; }
    .skills-header h2 { font-size: clamp(1.8rem, 8vw, 2.8rem); }
    .skills-header .bg-title { font-size: clamp(4rem, 15vw, 8rem); top: -30px; }
    .wall-grid { gap: 8px; grid-template-columns: repeat(6, 1fr); }
    .depth-layer.size-sm { grid-column: span 2; }
    .depth-layer.size-md { grid-column: span 3; }
    .depth-layer.size-lg { grid-column: span 3; }
    .depth-layer.size-xl { grid-column: span 3; grid-row: span 2; }
    .depth-layer.size-hero { grid-column: span 3; grid-row: span 2; }
    .skill-tile { min-height: 90px; padding: 14px; }
    .skill-tile .tile-logo { width: 32px; height: 32px; font-size: 0.9rem; }
    .depth-layer.size-xl .tile-logo, .depth-layer.size-hero .tile-logo { width: 44px; height: 44px; font-size: 1.3rem; }
    .skill-tile .tile-name { font-size: 0.55rem; }
    .depth-layer.size-xl .tile-name, .depth-layer.size-hero .tile-name { font-size: 0.7rem; }
    .skills-info-panel { width: 280px; right: -300px; padding: 28px 20px; }
    .skills-info-panel.open { right: 0; }
    .skills-search { max-width: 100%; margin: 30px auto 40px; }
}

@media (max-width: 480px) {
    .wall-grid { gap: 6px; grid-template-columns: repeat(4, 1fr); }
    .skill-tile { border-radius: 12px; min-height: 70px; padding: 8px; }
    .depth-layer.size-sm { grid-column: span 1; }
    .depth-layer.size-md { grid-column: span 2; }
    .depth-layer.size-lg { grid-column: span 2; }
    .depth-layer.size-xl { grid-column: span 2; grid-row: span 2; }
    .depth-layer.size-hero { grid-column: span 2; grid-row: span 2; }
    .skills-header .bg-title { display: none; }
    .skills-search input { font-size: 0.8rem; padding: 12px 14px; }
}