:root {
    --primary: #5865F2;
    --accent: #F47FFF;
    --java-color: #ED8B00;
    --bash-color: #FCC624;
    --mc-color: #2ecc71;
    --os-color: #00d2ff;
    --bg-dark: #090912;
    --text-main: #ffffff;
    --text-muted: #a0a0b0;
    --card-bg: rgba(6, 6, 12, 0.3);
    --card-border: rgba(255, 255, 255, 0.12);
    --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
}

body {
    font-family: 'Outfit', sans-serif;
    margin: 0;
    background-color: var(--bg-dark);
    background: linear-gradient(135deg, #090912 0%, #17152b 50%, #090912 100%);
    background-size: 200% 200%;
    animation: gradientBG 15s ease infinite;
    color: var(--text-main);
    overflow-x: hidden;
    min-height: 100vh;
    position: relative;
}

/* --- Background Canvas --- */
#bg-canvas {
    position: fixed;
    top: 0; left: 0; width: 100vw; height: 100vh;
    z-index: -2;
    pointer-events: none;
}
}

body::before {
    content: '';
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
    background-size: 30px 30px;
    z-index: -1;
    pointer-events: none;
}

@keyframes gradientBG {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

/* --- Background Blobs --- */
.background-blobs {
    position: fixed; top: 0; left: 0; width: 100%; height: 100%;
    z-index: -1; overflow: hidden;
}
.blob {
    position: absolute; border-radius: 50%; filter: blur(80px);
    opacity: 0.4;
}
.blob-1 { top: -20%; left: -10%; width: 50vw; height: 50vw; background: var(--primary); animation: floatBlob1 20s ease-in-out infinite alternate; }
.blob-2 { bottom: -20%; right: -10%; width: 40vw; height: 40vw; background: var(--accent); animation: floatBlob2 25s ease-in-out infinite alternate-reverse; }

@keyframes floatBlob1 {
    0% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(5vw, 10vh) scale(1.1); }
    100% { transform: translate(-5vw, 20vh) scale(1); }
}

@keyframes floatBlob2 {
    0% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(-10vw, -10vh) scale(1.2); }
    100% { transform: translate(5vw, -5vh) scale(0.9); }
}

/* --- Blur Loading Overlay --- */
#blur-overlay {
    position: fixed; inset: 0; background: rgba(9, 9, 18, 0.4);
    backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
    z-index: 9999; transition: opacity 1.2s cubic-bezier(0.16, 1, 0.3, 1), backdrop-filter 1.2s ease, visibility 1.2s ease;
    display: flex; align-items: center; justify-content: center;
}
.spinner {
    width: 40px; height: 40px;
    border: 3px solid rgba(255, 255, 255, 0.05);
    border-top-color: var(--primary);
    border-right-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.8s cubic-bezier(0.68, -0.55, 0.265, 1.55) infinite;
}
@keyframes spin { 100% { transform: rotate(360deg); } }

/* --- Main Content --- */
#content {
    display: none; padding: 60px 20px; max-width: 900px; margin: 0 auto;
    opacity: 0; animation: slideDownFadeBlur 1.2s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes slideDownFadeBlur {
    0% { opacity: 0; transform: translateY(-30px); filter: blur(12px); }
    100% { opacity: 1; transform: translateY(0); filter: blur(0); }
}

/* --- Hiệu ứng cuộn tới đâu hiện tới đó (Scroll Reveal) --- */
.reveal-item {
    opacity: 0;
    transform: translateY(40px);
    filter: blur(8px);
    will-change: opacity, transform, filter;
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1), filter 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal-item.active {
    opacity: 1;
    transform: translateY(0);
    filter: blur(0);
}

/* --- Glassmorphism Profile Header --- */
.glass-header {
    background: rgba(6, 6, 12, 0.3); backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px); border: 1px solid var(--card-border);
    border-radius: 24px; padding: 40px; margin-bottom: 50px;
    display: flex; align-items: center; gap: 30px; box-shadow: var(--glass-shadow);
}

.avatar-container { flex-shrink: 0; position: relative; }
.avatar-container::before {
    content: '';
    position: absolute;
    top: -4px; left: -4px; right: -4px; bottom: -4px;
    background: linear-gradient(45deg, var(--primary), var(--accent), var(--os-color), var(--primary));
    background-size: 400%;
    border-radius: 50%;
    z-index: -1;
    animation: animateBorder 8s linear infinite;
    filter: blur(8px);
    opacity: 0.7;
}
@keyframes animateBorder {
    0% { background-position: 0% 0%; }
    50% { background-position: 100% 100%; }
    100% { background-position: 0% 0%; }
}
.avatar {
    width: 140px; height: 140px; border-radius: 50%; object-fit: cover;
    border: 2px solid var(--primary); box-shadow: 0 0 20px rgba(88, 101, 242, 0.3);
    padding: 4px; background: rgba(255, 255, 255, 0.05);
    position: relative;
    z-index: 1;
}

.status-indicator {
    position: absolute;
    bottom: 8px; right: 8px;
    width: 28px; height: 28px;
    border-radius: 50%;
    background-color: #ed4245; /* Discord DND Color */
    border: 4px solid var(--bg-dark);
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 0 10px rgba(237, 66, 69, 0.5);
}

.status-indicator.dnd::after {
    content: '';
    width: 14px;
    height: 4px;
    background-color: var(--bg-dark);
    border-radius: 2px;
}

.profile-info { display: flex; flex-direction: column; width: 100%; }
.profile-info h1 {
    font-size: 3rem; margin: 0 0 5px 0; letter-spacing: -1px; font-weight: 900;
    background: linear-gradient(135deg, #fff 0%, var(--primary) 50%, var(--accent) 100%);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    filter: drop-shadow(0 0 20px rgba(88, 101, 242, 0.2));
}
.profile-info .subtitle { font-size: 1.05rem; color: var(--text-muted); margin: 0 0 16px 0; font-weight: 400; line-height: 1.6; }

.meta-info { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 24px; }
.meta-item {
    display: flex; align-items: center; gap: 6px; font-size: 0.9rem; color: #dcdcdc;
    background: rgba(255, 255, 255, 0.05); border: 1px solid var(--card-border);
    padding: 6px 12px; border-radius: 8px;
}

.profile-links { display: flex; gap: 12px; flex-wrap: wrap; }
.link-btn {
    background: rgba(255, 255, 255, 0.05); border: 1px solid var(--card-border);
    color: var(--text-main); text-decoration: none; padding: 8px 16px;
    border-radius: 8px; font-size: 0.9rem; font-weight: 500;
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    display: flex; align-items: center; gap: 8px;
}
.link-btn:hover { background: rgba(255, 255, 255, 0.1); border-color: rgba(255, 255, 255, 0.2); transform: translateY(-2px); }
.link-btn.primary { background: var(--primary); border-color: var(--primary); box-shadow: 0 5px 15px rgba(88, 101, 242, 0.4); }
.link-btn.primary:hover { background: #4752c4; border-color: #4752c4; }

.section-title { font-size: 1.8rem; margin-bottom: 24px; font-weight: 700; display: flex; align-items: center; gap: 10px; }

/* --- Project & Hobby Cards Grid --- */
.projects-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 24px; margin-bottom: 60px; }
.card {
    background-color: var(--card-bg); backdrop-filter: blur(60px); -webkit-backdrop-filter: blur(60px);
    border: 1px solid var(--card-border); padding: 24px; border-radius: 16px;
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.4s ease, box-shadow 0.4s ease;
    position: relative; overflow: hidden;
    display: block;
    text-decoration: none;
    color: inherit;
    will-change: transform, box-shadow, border-color;
    transform: translateZ(0);
    transform-style: preserve-3d;
}
.card::before {
    content: ''; position: absolute; top: 0; left: -100%; width: 100%; height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.03), transparent); transition: 0.5s;
    transform: translateZ(0);
}
.card:hover::before { left: 100%; }
.card:hover { border-color: rgba(88, 101, 242, 0.3); box-shadow: 0 10px 30px rgba(0,0,0,0.5), 0 0 15px rgba(88, 101, 242, 0.1); }
.card h3 { margin: 0 0 12px 0; font-size: 1.4rem; font-weight: 700; padding-right: 20px; transform: translateZ(30px); }
.card p { margin: 0 0 20px 0; font-size: 0.95rem; line-height: 1.6; color: var(--text-muted); transform: translateZ(30px); }
.tech-tags { display: flex; gap: 8px; flex-wrap: wrap; transform: translateZ(20px); }
.tag { background-color: rgba(88, 101, 242, 0.1); border: 1px solid rgba(88, 101, 242, 0.2); color: #dcdcdc; font-size: 0.8rem; padding: 4px 10px; border-radius: 6px; }

/* Icon mũi tên trong thẻ Card */
.card-arrow {
    position: absolute; top: 24px; right: 24px; color: var(--text-muted);
    opacity: 0; transform: translate(-10px, 10px); transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}
.card:hover .card-arrow { opacity: 1; transform: translate(0, 0); color: var(--primary); }

/* --- Hobby Card --- */
.hobby-card {
    background-color: var(--card-bg); backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--card-border); padding: 24px; border-radius: 16px;
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275), border-color 0.3s ease, box-shadow 0.3s ease;
    position: relative; overflow: hidden;
    display: block;
    transform-style: preserve-3d;
}
.hobby-card:hover { border-color: rgba(244, 127, 255, 0.5); box-shadow: 0 15px 35px rgba(0,0,0,0.4), 0 0 20px rgba(244, 127, 255, 0.15); }
.hobby-card h3 { margin: 0 0 12px 0; font-size: 1.4rem; font-weight: 700; padding-right: 20px; transform: translateZ(30px); }
.hobby-card p { margin: 0 0 20px 0; font-size: 0.95rem; line-height: 1.6; color: var(--text-muted); transform: translateZ(20px); }

/* Thêm style cho ảnh trong thẻ Hobby */
.hobby-img {
    width: 100%;
    height: 160px;
    object-fit: cover;
    border-radius: 8px;
    margin-bottom: 16px;
    border: 1px solid rgba(255,255,255,0.05);
    background-color: rgba(0,0,0,0.2);
    transform: translateZ(40px);
}

/* --- Experience Tree Section --- */
.experience-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 24px; margin-bottom: 60px; }
.exp-card {
    background-color: var(--card-bg); backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--card-border); padding: 24px; border-radius: 16px;
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275), border-color 0.3s ease, box-shadow 0.3s ease;
    position: relative; overflow: hidden; min-height: 200px;
    transform-style: preserve-3d;
}
.exp-card::after {
    content: "HOVER TO EXPAND"; position: absolute; bottom: 24px; left: 24px;
    font-size: 0.75rem; letter-spacing: 2px; color: rgba(255,255,255,0.2); transition: opacity 0.3s ease;
    transform: translateZ(10px);
}
.exp-card:hover { border-color: rgba(255,255,255,0.3); box-shadow: 0 15px 35px rgba(0,0,0,0.4), 0 0 20px rgba(255,255,255,0.1); }
.exp-card:hover::after { opacity: 0; }
.exp-card h3 { margin: 0 0 16px 0; font-size: 1.4rem; font-weight: 700; position: relative; z-index: 2; transform: translateZ(30px); }

.exp-card.java h3 { color: var(--java-color); }
.exp-card.python h3 { color: var(--primary); }
.exp-card.mc h3 { color: var(--mc-color); }
.exp-card.os h3 { color: var(--os-color); }
.exp-card.other h3 { color: var(--accent); }

.exp-tree { font-family: 'Consolas', 'Courier New', monospace; font-size: 0.95rem; line-height: 1.8; position: relative; z-index: 2; transform: translateZ(20px); }
.tree-line {
    color: var(--text-muted); opacity: 0; transform: translateY(10px);
    transition: all 0.2s ease;
}

@media (min-width: 851px) {
    .exp-card:hover .tree-line {
        opacity: 1; transform: translateY(0); color: #dcdcdc;
        transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    }
    .exp-card:hover .tree-line:nth-child(1) { transition-delay: 0.05s; }
    .exp-card:hover .tree-line:nth-child(2) { transition-delay: 0.1s; }
    .exp-card:hover .tree-line:nth-child(3) { transition-delay: 0.15s; }
    .exp-card:hover .tree-line:nth-child(4) { transition-delay: 0.2s; }
    .exp-card:hover .tree-line:nth-child(5) { transition-delay: 0.25s; }
}

/* --- Circular Chart Section --- */
.lang-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 24px; margin-bottom: 60px; }
.lang-card {
    background-color: var(--card-bg); backdrop-filter: blur(20px); border: 1px solid var(--card-border);
    border-radius: 16px; padding: 30px 20px; text-align: center; box-shadow: var(--glass-shadow);
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275), border-color 0.3s ease, background-color 0.3s ease, box-shadow 0.3s ease;
    cursor: default;
    transform-style: preserve-3d;
}
.lang-card:hover { border-color: var(--color); background-color: rgba(255,255,255,0.05); box-shadow: 0 15px 35px rgba(0,0,0,0.4), 0 0 20px var(--color); }

/* --- Education Progress --- */
.edu-card {
    background-color: var(--card-bg); backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--card-border); padding: 40px 30px; border-radius: 16px;
    margin-bottom: 60px;
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275), border-color 0.3s ease, box-shadow 0.3s ease;
}
.edu-card:hover {
    transform: translateY(-8px); border-color: rgba(255,255,255,0.3); box-shadow: 0 15px 35px rgba(0,0,0,0.4), 0 0 20px rgba(255,255,255,0.1);
}
.edu-track {
    position: relative;
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin: 0 20px 20px 20px;
}
.edu-track::before {
    content: '';
    position: absolute;
    top: 50%; left: 0; right: 0;
    height: 4px;
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-50%);
    border-radius: 2px;
    z-index: 1;
}
.edu-progress {
    position: absolute;
    top: 50%; left: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary) 0%, var(--accent) 100%);
    transform: translateY(-50%);
    border-radius: 2px;
    z-index: 2;
    width: 0;
    transition: width 1.5s cubic-bezier(0.16, 1, 0.3, 1) 0.3s;
}
.edu-card.active .edu-progress {
    width: 83.33%;
}
.edu-step {
    position: relative; z-index: 3;
    width: 20px; height: 20px; border-radius: 50%;
    background: var(--bg-dark);
    border: 4px solid rgba(255, 255, 255, 0.2);
    transition: all 0.5s ease;
}
.edu-step.completed { border-color: var(--primary); box-shadow: 0 0 10px rgba(88, 101, 242, 0.5); }
.edu-step.current { border-color: var(--accent); box-shadow: 0 0 15px rgba(244, 127, 255, 0.6); }

.edu-labels {
    display: flex; justify-content: space-between;
    margin: 0 -5px;
}
.edu-label {
    width: 60px; text-align: center;
    font-size: 0.95rem; font-weight: 600; color: var(--text-muted);
}
.edu-label.completed { color: #fff; }
.edu-label.current { color: var(--accent); }

/* --- GitHub Streak --- */
.github-streak-container {
    background-color: var(--card-bg); backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--card-border); padding: 24px; border-radius: 16px;
    margin-bottom: 60px; display: flex; justify-content: center; align-items: center;
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275), border-color 0.3s ease, box-shadow 0.3s ease;
    transform-style: preserve-3d;
}
.github-streak-container:hover {
    border-color: rgba(255,255,255,0.3); box-shadow: 0 15px 35px rgba(0,0,0,0.4), 0 0 20px rgba(255,255,255,0.1);
}
.github-streak-img {
    max-width: 100%; height: auto; border-radius: 8px; filter: drop-shadow(0 0 10px rgba(0,0,0,0.3));
    transform: translateZ(40px);
}

/* --- Discord Widget --- */
.discord-widget-container {
    background-color: var(--card-bg); backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--card-border); padding: 24px; border-radius: 16px;
    margin-bottom: 60px; display: flex; justify-content: center;
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275), border-color 0.3s ease, box-shadow 0.3s ease;
}
.discord-widget-container:hover {
    transform: translateY(-8px); border-color: rgba(88, 101, 242, 0.5); box-shadow: 0 15px 35px rgba(0,0,0,0.4), 0 0 20px rgba(88, 101, 242, 0.15);
}
.discord-widget-container iframe {
    max-width: 100%; border-radius: 8px;
}

.circle-container { position: relative; width: 120px; height: 120px; margin: 0 auto 20px; transform: translateZ(40px); }
.circle-container svg { width: 100%; height: 100%; transform: rotate(-90deg); filter: drop-shadow(0 0 10px rgba(0,0,0,0.5)); }
.circle-bg { fill: none; stroke: rgba(255, 255, 255, 0.05); stroke-width: 8; }
.circle-progress {
    fill: none; stroke: var(--color); stroke-width: 8; stroke-linecap: round;
    stroke-dasharray: 251.2; stroke-dashoffset: 251.2;
    transition: stroke-dashoffset 1s cubic-bezier(0.175, 0.885, 0.32, 1.275); filter: drop-shadow(0 0 8px var(--color));
}
.circle-text {
    position: absolute; inset: 0; display: flex; flex-direction: column; justify-content: center; align-items: center;
    opacity: 0; transform: scale(0.8); transition: all 0.4s ease;
}
.circle-text .hours { font-size: 1.6rem; font-weight: 900; color: var(--text-main); line-height: 1; }
.circle-text .label { font-size: 0.8rem; color: var(--text-muted); margin-top: 4px; }
.default-icon {
    position: absolute; inset: 0; display: flex; justify-content: center; align-items: center;
    font-size: 2.2rem; font-weight: 900; color: rgba(255,255,255,0.2); transition: all 0.4s ease;
}
.lang-name { font-size: 1.3rem; font-weight: 700; margin-bottom: 5px; color: var(--text-main); }
.lang-desc { font-size: 0.95rem; color: var(--text-muted); }

@media (min-width: 851px) {
    .lang-card:hover .circle-progress { stroke-dashoffset: calc(251.2 - (251.2 * var(--percent)) / 100); }
    .lang-card:hover .circle-text { opacity: 1; transform: scale(1); }
    .lang-card:hover .default-icon { opacity: 0; transform: scale(0.5); }
}

/* --- Line Stats Chart --- */
.line-stats-card {
    background-color: var(--card-bg); backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--card-border); padding: 30px 40px; border-radius: 16px;
    margin-bottom: 60px; box-shadow: var(--glass-shadow);
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275), border-color 0.3s ease, box-shadow 0.3s ease;
    position: relative;
    will-change: transform, box-shadow;
    transform: translateZ(0);
    transform-style: preserve-3d;
}
.line-stats-card:hover {
    border-color: rgba(255,255,255,0.3); box-shadow: 0 15px 35px rgba(0,0,0,0.4), 0 0 20px rgba(255,255,255,0.1);
}

.stat-line-wrapper {
    margin-bottom: 15px;
    transition: margin-bottom 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    transform: translateZ(30px);
}
.stat-line-wrapper:last-child { margin-bottom: 0; }

.stat-line-info {
    display: flex; justify-content: space-between; align-items: center;
    font-size: 1.05rem; font-weight: 700; color: var(--text-main);
    opacity: 0; max-height: 0; margin-bottom: 0; overflow: hidden; transform: translateY(10px);
    transition: max-height 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275), margin-bottom 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275), opacity 0.4s ease, transform 0.4s ease;
    will-change: max-height, opacity, transform, margin-bottom;
}
.stat-line-desc { font-size: 0.85rem; font-weight: 400; color: var(--text-muted); margin-left: 8px; }

.stat-line-bg {
    width: 100%; height: 12px; background: rgba(255,255,255,0.05); border-radius: 6px;
    overflow: hidden;
}
.stat-line-fill {
    height: 100%; background: var(--color); border-radius: 6px; width: 0;
    transition: width 1.5s cubic-bezier(0.16, 1, 0.3, 1) 0.3s;
    box-shadow: 0 0 10px var(--color);
    will-change: width;
}
.line-stats-card.active .stat-line-fill { width: var(--percent); }

.hover-hint {
    text-align: center; color: rgba(255,255,255,0.2); font-size: 0.8rem; letter-spacing: 2px;
    margin-top: 10px; max-height: 20px; overflow: hidden;
    transition: opacity 0.3s ease, max-height 0.3s ease, margin 0.3s ease; text-transform: uppercase;
    transform: translateZ(10px);
}

@media (min-width: 851px) {
    .line-stats-card:hover .stat-line-wrapper { margin-bottom: 25px; }
    .line-stats-card:hover .stat-line-info { opacity: 1; max-height: 40px; margin-bottom: 8px; transform: translateY(0); }
    .line-stats-card:hover .hover-hint { opacity: 0; max-height: 0; margin-top: 0; }
}

/* =========================================
   📱 MOBILE UI RESPONSIVE & LOGIC
   ========================================= */
@media (max-width: 850px) {
    .glass-header { flex-direction: column; text-align: center; padding: 30px 20px; }
    .meta-info, .profile-links { justify-content: center; }

    .card.active .card-arrow { opacity: 1; transform: translate(0, 0); }

    .exp-card::after { display: none; }
    .exp-card.active .tree-line {
        opacity: 1; transform: translateY(0); color: #dcdcdc;
        transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    }
    .exp-card.active .tree-line:nth-child(1) { transition-delay: 0.1s; }
    .exp-card.active .tree-line:nth-child(2) { transition-delay: 0.2s; }
    .exp-card.active .tree-line:nth-child(3) { transition-delay: 0.3s; }
    .exp-card.active .tree-line:nth-child(4) { transition-delay: 0.4s; }
    .exp-card.active .tree-line:nth-child(5) { transition-delay: 0.5s; }

    .lang-card.active .circle-progress { stroke-dashoffset: calc(251.2 - (251.2 * var(--percent)) / 100); }
    .lang-card.active .circle-text { opacity: 1; transform: scale(1); }
    .lang-card.active .default-icon { opacity: 0; transform: scale(0.5); }

    .line-stats-card .stat-line-wrapper { margin-bottom: 25px; }
    .line-stats-card .stat-line-info { opacity: 1; max-height: 40px; margin-bottom: 8px; transform: translateY(0); }
    .line-stats-card .hover-hint { display: none; }
}

/* --- Typing Effect --- */
.type-char {
    opacity: 0;
    transition: opacity 0.05s ease;
}
.type-char.visible {
    opacity: 1;
}

/* --- Mouse Glow --- */
.mouse-glow {
    position: fixed;
    top: 0; left: 0;
    width: 600px; height: 600px;
    background: radial-gradient(circle, rgba(88, 101, 242, 0.08) 0%, transparent 60%);
    border-radius: 50%;
    transform: translate(-50%, -50%) translate3d(0, 0, 0);
    pointer-events: none;
    z-index: 9998;
    mix-blend-mode: screen;
    transition: opacity 0.6s ease;
    opacity: 0;
    will-change: transform, opacity;
}
body:hover .mouse-glow {
    opacity: 1;
}

/* --- Audio Control --- */
.audio-control {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background: rgba(15, 15, 25, 0.6);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--card-border);
    color: var(--text-muted);
    border-radius: 50%;
    width: 50px;
    height: 50px;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    z-index: 1000;
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
}
.audio-control:hover {
    transform: translateY(-5px) scale(1.1);
    color: var(--primary);
    border-color: rgba(88, 101, 242, 0.5);
    box-shadow: 0 8px 25px rgba(0,0,0,0.4), 0 0 15px rgba(88, 101, 242, 0.2);
}
.audio-control.playing {
    color: var(--primary);
    border-color: rgba(88, 101, 242, 0.3);
}
.audio-control.playing svg {
    animation: musicPulse 2s infinite;
}
@keyframes musicPulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.15); filter: drop-shadow(0 0 5px var(--primary)); }
    100% { transform: scale(1); }
}
@media (max-width: 850px) {
    .audio-control {
        bottom: 20px;
        right: 20px;
        width: 45px;
        height: 45px;
    }
}