:root {
        --bg-main: #0a0b10;
        --bg-card: #121420;
        --bg-nav: rgba(10, 11, 16, 0.85);
        --text-main: #adbac7;
        --text-bright: #ffffff;
        --accent-cyan: #00d2ff;
        --accent-purple: #9b5de5;
        --gradient-neon: linear-gradient(135deg, #00d2ff 0%, #9b5de5 100%);
        --shadow-neon: 0 0 20px rgba(0, 210, 255, 0.2), 0 0 40px rgba(155, 93, 235, 0.2);
        --transition-smooth: all 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    }

    * {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
        scroll-behavior: smooth;
    }

    html {
        background-color: var(--bg-main);
    }

    body {
        font-family: 'Poppins', sans-serif;
        background-color: transparent;
        color: var(--text-main);
        line-height: 1.6;
        overflow-x: hidden;
        position: relative;
    }

    @media (pointer: fine) {
        html, body {
            cursor: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24'%3E%3Cpath fill='%2300d2ff' stroke='%230a0b10' stroke-width='1.5' stroke-linejoin='round' d='M4.5 3v15.2l3.8-3.8 2.7 5.8 2.8-1.3-2.7-5.8 5.2-.1z'/%3E%3C/svg%3E") 0 0, auto;
        }

        a, button, input, label, select, textarea, .project-card, .social-btn, .hobby-box, .timeline-content, .skill-box, .mobile-menu-btn, .visitor-counter {
            cursor: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24'%3E%3Cpath fill='%2300d2ff' stroke='%230a0b10' stroke-width='1.5' stroke-linejoin='round' d='M10 2a1.5 1.5 0 0 0-1.5 1.5v8.3l-1.6-1.6a1.5 1.5 0 0 0-2.1 2.1l4.8 4.8c2 2 4.8 3.4 7.9 3.4h.5A7.5 7.5 0 0 0 23 13v-3.5a1.5 1.5 0 0 0-2.5-1.1A1.5 1.5 0 0 0 18 8a1.5 1.5 0 0 0-1.5-1.1A1.5 1.5 0 0 0 14 6v-2.5A1.5 1.5 0 0 0 10 2z'/%3E%3C/svg%3E") 8 1, pointer !important;
        }
    }

    #preloader {
        position: fixed;
        top: 0;
        left: 0;
        width: 100vw;
        height: 100vh;
        background-color: #06070a;
        z-index: 10000;
        display: flex;
        justify-content: center;
        align-items: center;
        transition: opacity 0.8s cubic-bezier(0.77, 0, 0.175, 1), visibility 0.8s ease;
    }

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

    .loader-content {
        text-align: center;
        width: 280px;
    }

    .loader-logo {
        font-size: 1.8rem;
        font-weight: 700;
        letter-spacing: 2px;
        background: var(--gradient-neon);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        margin-bottom: 20px;
        animation: pulseText 1.5s infinite ease-in-out;
    }

    .loader-bar-bg {
        width: 100%;
        height: 4px;
        background: rgba(255, 255, 255, 0.08);
        border-radius: 4px;
        overflow: hidden;
        margin-bottom: 12px;
        border: 1px solid rgba(0, 210, 255, 0.2);
    }

    .loader-bar {
        width: 0%;
        height: 100%;
        background: var(--gradient-neon);
        box-shadow: 0 0 12px var(--accent-cyan);
        transition: width 0.1s ease-out;
    }

    .loader-status {
        font-size: 0.75rem;
        color: var(--accent-cyan);
        letter-spacing: 1.5px;
        font-family: monospace;
    }

    @keyframes pulseText {
        0%, 100% { opacity: 0.8; transform: scale(0.98); }
        50% { opacity: 1; transform: scale(1.02); }
    }

    #particles-bg {
        position: fixed;
        top: 0;
        left: 0;
        width: 100vw;
        height: 100vh;
        z-index: 0;
        pointer-events: none;
    }

    a {
        text-decoration: none;
        color: inherit;
    }

    section, header, footer, nav {
        position: relative;
        z-index: 1;
    }

    section {
        padding: 100px 20px 80px 20px;
        max-width: 1200px;
        margin: 0 auto;
    }

    .section-title {
        font-size: 2.5rem;
        color: var(--text-bright);
        text-align: center;
        margin-bottom: 50px;
        position: relative;
        font-weight: 700;
    }

    .section-title::after {
        content: '';
        position: absolute;
        bottom: -10px;
        left: 50%;
        transform: translateX(-50%);
        width: 60px;
        height: 4px;
        background: var(--gradient-neon);
        border-radius: 2px;
    }

    .navbar {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        background-color: var(--bg-nav);
        backdrop-filter: blur(12px);
        -webkit-backdrop-filter: blur(12px);
        z-index: 1000;
        border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
    }

    .nav-container {
        max-width: 1200px;
        margin: 0 auto;
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 16px 20px;
    }

    .logo {
        font-size: 1.5rem;
        font-weight: 700;
        background: var(--gradient-neon);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        letter-spacing: 1px;
    }

    .nav-links {
        list-style: none;
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background: rgba(12, 14, 22, 0.95);
        backdrop-filter: blur(25px);
        -webkit-backdrop-filter: blur(25px);
        border-left: 1px solid rgba(0, 210, 255, 0.15);
        box-shadow: -10px 0 30px rgba(0, 0, 0, 0.8);
        display: flex;
        flex-direction: column;
        align-items: flex-start;
        justify-content: center;
        padding: 40px 25px;
        gap: 18px;
        transition: right 0.4s cubic-bezier(0.16, 1, 0.3, 1);
        z-index: 1001;
    }

    .nav-links.active {
        right: 0;
    }

    .nav-links li {
        width: 100%;
        opacity: 0;
        transform: translateX(25px);
        transition: opacity 0.35s ease, transform 0.35s ease;
    }

    .nav-links.active li {
        opacity: 1;
        transform: translateX(0);
    }

    .nav-links.active li:nth-child(1) { transition-delay: 0.08s; }
    .nav-links.active li:nth-child(2) { transition-delay: 0.14s; }
    .nav-links.active li:nth-child(3) { transition-delay: 0.20s; }
    .nav-links.active li:nth-child(4) { transition-delay: 0.26s; }
    .nav-links.active li:nth-child(5) { transition-delay: 0.32s; }

    .nav-links a {
        font-size: 1.05rem;
        font-weight: 500;
        transition: var(--transition-smooth);
        position: relative;
        display: flex;
        align-items: center;
        gap: 14px;
        padding: 12px 18px;
        border-radius: 12px;
        width: 100%;
        color: var(--text-main);
        background: rgba(255, 255, 255, 0.02);
        border: 1px solid rgba(255, 255, 255, 0.03);
    }

    .nav-links a i {
        display: inline-block;
        font-size: 1.1rem;
        color: var(--accent-cyan);
        width: 20px;
        text-align: center;
    }

    .nav-links a:hover, .nav-links a.active {
        background: rgba(0, 210, 255, 0.1);
        border-color: rgba(0, 210, 255, 0.3);
        color: var(--text-bright);
        box-shadow: 0 0 15px rgba(0, 210, 255, 0.15);
    }

    .nav-controls {
        display: flex;
        align-items: center;
        gap: 10px;
    }

    .icon-btn {
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 6px;
        background: rgba(255, 255, 255, 0.04);
        border: 1px solid rgba(0, 210, 255, 0.2);
        border-radius: 12px;
        width: 42px;
        height: 42px;
        color: var(--text-bright);
        font-size: 1rem;
        font-weight: 600;
        backdrop-filter: blur(8px);
        transition: var(--transition-smooth);
    }

    .icon-btn:hover {
        border-color: var(--accent-cyan);
        box-shadow: 0 0 15px rgba(0, 210, 255, 0.3);
        background: rgba(0, 210, 255, 0.1);
    }

    .visitor-counter {
        width: auto;
        padding: 0 12px;
        font-size: 0.85rem;
        gap: 7px;
        color: var(--accent-cyan);
        letter-spacing: 0.5px;
    }

    .visitor-counter i {
        font-size: 0.95rem;
        color: var(--accent-cyan);
    }

    #lang-toggle {
        width: auto;
        padding: 0 12px;
        font-size: 0.85rem;
        letter-spacing: 0.5px;
    }

    .mobile-menu-btn {
        display: flex;
        background: rgba(255, 255, 255, 0.04);
        border: 1px solid rgba(0, 210, 255, 0.2);
        border-radius: 12px;
        padding: 8px;
        z-index: 1002;
        width: 42px;
        height: 42px;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 5px;
        backdrop-filter: blur(8px);
        transition: var(--transition-smooth);
    }

    .mobile-menu-btn:hover, .mobile-menu-btn.active {
        border-color: var(--accent-cyan);
        box-shadow: 0 0 15px rgba(0, 210, 255, 0.3);
        background: rgba(0, 210, 255, 0.1);
    }

    .hamburger-line {
        display: block;
        width: 20px;
        height: 2px;
        background: var(--text-bright);
        border-radius: 2px;
        transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.2s ease, background 0.3s ease;
    }

    .mobile-menu-btn.active .hamburger-line:nth-child(1) {
        transform: translateY(7px) rotate(45deg);
        background: var(--accent-cyan);
    }

    .mobile-menu-btn.active .hamburger-line:nth-child(2) {
        opacity: 0;
        transform: scaleX(0);
    }

    .mobile-menu-btn.active .hamburger-line:nth-child(3) {
        transform: translateY(-7px) rotate(-45deg);
        background: var(--accent-cyan);
    }

    .menu-backdrop {
        display: block;
        position: fixed;
        top: 0;
        left: 0;
        width: 100vw;
        height: 100vh;
        background: rgba(0, 0, 0, 0.65);
        backdrop-filter: blur(6px);
        -webkit-backdrop-filter: blur(6px);
        opacity: 0;
        pointer-events: none;
        transition: opacity 0.35s ease;
        z-index: 999;
    }

    .menu-backdrop.active {
        opacity: 1;
        pointer-events: auto;
    }

    .hero {
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        min-height: 100vh;
        padding: 120px 20px 60px;
    }

    .hero-top {
        display: grid;
        grid-template-columns: minmax(190px, 260px) 1fr;
        align-items: center;
        gap: 56px;
        width: 100%;
        max-width: 860px;
        margin: 0 auto;
    }

    .hero-left {
        display: flex;
        flex-direction: column;
        align-items: center;
        text-align: center;
    }

    .hero-right {
        display: flex;
        flex-direction: column;
        align-items: flex-start;
        text-align: left;
        gap: 14px;
    }

    .hero-right .description {
        margin-left: 0;
        margin-right: 0;
        max-width: 100%;
    }

    .avatar-wrapper {
        position: relative;
        width: 138px;
        height: 138px;
        margin-bottom: 22px;
    }

    .avatar-wrapper::before {
        content: '';
        position: absolute;
        top: -5px;
        left: -5px;
        right: -5px;
        bottom: -5px;
        background: var(--gradient-neon);
        border-radius: 50%;
        z-index: -1;
        box-shadow: var(--shadow-neon);
        animation: pulse 3s infinite alternate;
    }

    .avatar {
        width: 100%;
        height: 100%;
        border-radius: 50%;
        object-fit: cover;
        border: 4px solid var(--bg-main);
    }

    .hero h1 {
        font-size: 2.05rem;
        color: var(--text-bright);
        margin-bottom: 8px;
        font-weight: 700;
        line-height: 1.22;
    }

    .hero h1 span {
        display: block;
        background: var(--gradient-neon);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
    }

    .hero .tagline {
        font-size: 0.95rem;
        color: var(--accent-cyan);
        font-weight: 500;
        letter-spacing: 1px;
    }

    .hero .description {
        max-width: 480px;
        margin-bottom: 0;
        font-size: 0.95rem;
        line-height: 1.65;
    }

    .hero-right .social-btn {
        width: 42px;
        height: 42px;
        font-size: 1.1rem;
    }

    .hero-right .discord-status,
    .hero-right .spotify-player,
    .hero-right .discord-game-card {
        margin-top: 0;
        width: 100%;
        max-width: 320px;
    }

    .hero-right .discord-status {
        padding: 8px 18px 8px 8px;
        gap: 12px;
    }

    .hero-right .discord-status-avatar-wrap {
        width: 36px;
        height: 36px;
    }

    .hero-right .discord-status-name {
        font-size: 0.85rem;
    }

    .hero-right .discord-status-activity,
    .hero-right .discord-custom-status {
        font-size: 0.76rem;
    }

    #scroll-progress {
        position: fixed;
        top: 0;
        left: 0;
        height: 3px;
        width: 0%;
        background: var(--gradient-neon);
        box-shadow: 0 0 8px rgba(0, 210, 255, 0.6);
        z-index: 2000;
        transition: width 0.1s ease-out;
    }

    .cursor-particle {
        position: fixed;
        top: 0;
        left: 0;
        width: 6px;
        height: 6px;
        border-radius: 50%;
        background: var(--accent-cyan);
        box-shadow: 0 0 6px rgba(0, 210, 255, 0.8);
        pointer-events: none;
        z-index: 9998;
        opacity: 0.8;
        animation: cursor-particle-fade 0.6s ease-out forwards;
    }

    @keyframes cursor-particle-fade {
        to {
            opacity: 0;
            transform: scale(0.2);
        }
    }

    .discord-status {
        display: flex;
        align-items: center;
        gap: 14px;
        margin-top: 28px;
        background: var(--bg-card);
        border: 1px solid rgba(255, 255, 255, 0.06);
        border-radius: 50px;
        padding: 10px 22px 10px 10px;
        transition: var(--transition-smooth);
    }

    .discord-status:hover {
        border-color: rgba(0, 210, 255, 0.25);
        box-shadow: var(--shadow-neon);
    }

    .discord-status-avatar-wrap {
        position: relative;
        width: 42px;
        height: 42px;
        flex-shrink: 0;
    }

    .discord-status-avatar {
        width: 100%;
        height: 100%;
        border-radius: 50%;
        object-fit: cover;
        background: rgba(255, 255, 255, 0.05);
    }

    .discord-status-dot {
        position: absolute;
        bottom: -2px;
        right: -2px;
        width: 14px;
        height: 14px;
        border-radius: 50%;
        border: 3px solid var(--bg-card);
        background: #747f8d;
        transition: background-color 0.3s ease;
    }

    .discord-status-dot.online { background: #23a55a; }
    .discord-status-dot.idle { background: #f0b232; }
    .discord-status-dot.dnd { background: #f23f42; }
    .discord-status-dot.offline { background: #80848e; }

    .discord-status-text {
        text-align: left;
    }

    .discord-status-name {
        font-size: 0.9rem;
        font-weight: 600;
        color: var(--text-bright);
        line-height: 1.3;
    }

    .discord-status-activity {
        font-size: 0.8rem;
        color: var(--text-main);
        line-height: 1.3;
        max-width: 260px;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }

    .discord-custom-status {
        font-size: 0.76rem;
        color: var(--text-main);
        font-style: italic;
        line-height: 1.3;
        margin-top: 2px;
        max-width: 260px;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }

    .discord-custom-status img.emoji {
        width: 14px;
        height: 14px;
        vertical-align: -2px;
        margin-right: 4px;
    }

    .discord-game-card {
        display: flex;
        align-items: center;
        gap: 14px;
        margin-top: 14px;
        background: var(--bg-card);
        border: 1px solid rgba(124, 58, 237, 0.25);
        border-radius: 18px;
        padding: 12px 18px;
        max-width: 360px;
        transition: var(--transition-smooth);
    }

    .discord-game-card:hover {
        border-color: rgba(124, 58, 237, 0.5);
        box-shadow: 0 0 20px rgba(124, 58, 237, 0.15);
    }

    .discord-game-icon-wrap {
        position: relative;
        width: 52px;
        height: 52px;
        flex-shrink: 0;
    }

    .discord-game-icon {
        width: 100%;
        height: 100%;
        border-radius: 12px;
        object-fit: cover;
        background: rgba(255, 255, 255, 0.05);
    }

    .discord-game-badge {
        position: absolute;
        bottom: -4px;
        right: -4px;
        width: 22px;
        height: 22px;
        border-radius: 50%;
        border: 3px solid var(--bg-card);
        object-fit: cover;
        background: var(--bg-card);
    }

    .discord-game-info {
        flex: 1;
        min-width: 0;
        text-align: left;
    }

    .discord-game-name {
        font-size: 0.88rem;
        font-weight: 600;
        color: var(--text-bright);
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    .discord-game-details,
    .discord-game-state {
        font-size: 0.76rem;
        color: var(--text-main);
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
        line-height: 1.35;
    }

    .discord-game-elapsed {
        font-size: 0.7rem;
        color: var(--accent-purple);
        font-family: monospace;
        margin-top: 3px;
    }

    .spotify-player {
        display: flex;
        align-items: center;
        gap: 14px;
        margin-top: 14px;
        background: var(--bg-card);
        border: 1px solid rgba(29, 185, 84, 0.25);
        border-radius: 18px;
        padding: 12px 18px;
        max-width: 360px;
        transition: var(--transition-smooth);
    }

    .spotify-player:hover {
        border-color: rgba(29, 185, 84, 0.5);
        box-shadow: 0 0 20px rgba(29, 185, 84, 0.15);
    }

    .spotify-art {
        width: 52px;
        height: 52px;
        border-radius: 10px;
        object-fit: cover;
        flex-shrink: 0;
    }

    .spotify-info {
        flex: 1;
        min-width: 0;
        text-align: left;
    }

    .spotify-track {
        font-size: 0.88rem;
        font-weight: 600;
        color: var(--text-bright);
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    .spotify-artist {
        font-size: 0.76rem;
        color: var(--text-main);
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
        margin-bottom: 6px;
    }

    .spotify-progress-row {
        display: flex;
        align-items: center;
        gap: 8px;
    }

    .spotify-time {
        font-size: 0.65rem;
        color: var(--text-main);
        flex-shrink: 0;
        min-width: 28px;
    }

    .spotify-progress-bg {
        flex: 1;
        height: 4px;
        border-radius: 2px;
        background: rgba(255, 255, 255, 0.08);
        overflow: hidden;
    }

    .spotify-progress-fill {
        height: 100%;
        width: 0%;
        border-radius: 2px;
        background: linear-gradient(90deg, #1DB954, var(--accent-cyan));
    }

    .spotify-waveform {
        display: flex;
        align-items: flex-end;
        gap: 3px;
        height: 14px;
        margin-top: 6px;
    }

    .spotify-waveform span {
        width: 3px;
        height: 30%;
        border-radius: 2px;
        background: #1DB954;
        animation: waveform-bounce 1.1s ease-in-out infinite;
        animation-play-state: paused;
    }

    .spotify-waveform span:nth-child(1) { animation-delay: 0s; }
    .spotify-waveform span:nth-child(2) { animation-delay: 0.15s; }
    .spotify-waveform span:nth-child(3) { animation-delay: 0.3s; }
    .spotify-waveform span:nth-child(4) { animation-delay: 0.45s; }
    .spotify-waveform span:nth-child(5) { animation-delay: 0.6s; }

    .spotify-waveform.playing span {
        animation-play-state: running;
    }

    @keyframes waveform-bounce {
        0%, 100% { height: 25%; }
        50% { height: 100%; }
    }

    .social-icons {
        display: flex;
        gap: 20px;
    }

    .social-btn {
        width: 50px;
        height: 50px;
        background: var(--bg-card);
        border: 1px solid rgba(255, 255, 255, 0.1);
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 1.3rem;
        color: var(--text-bright);
        transition: var(--transition-smooth);
    }

    .social-btn:hover {
        transform: translateY(-5px);
        background: var(--gradient-neon);
        box-shadow: var(--shadow-neon);
        border-color: transparent;
    }

    /* ============================================================
       Music Player (nhạc nền website)
       ============================================================ */

    .music-player {
        width: 100%;
        max-width: 520px;
        margin: 40px auto 0;
        background: var(--bg-card);
        border: 1px solid rgba(255, 255, 255, 0.07);
        border-radius: 18px;
        padding: 16px 20px;
        backdrop-filter: blur(6px);
        transition: var(--transition-smooth);
    }

    .music-player:hover {
        border-color: rgba(0, 210, 255, 0.2);
        box-shadow: 0 0 24px rgba(0, 210, 255, 0.08);
    }

    .music-player-top {
        display: flex;
        align-items: center;
        gap: 14px;
        text-align: left;
    }

    .music-art-wrap {
        position: relative;
        width: 52px;
        height: 52px;
        flex-shrink: 0;
        border-radius: 13px;
        background: linear-gradient(145deg, rgba(0, 210, 255, 0.12), rgba(155, 93, 235, 0.12));
        border: 1px solid rgba(255, 255, 255, 0.08);
        display: flex;
        align-items: center;
        justify-content: center;
        overflow: hidden;
    }

    .music-art {
        width: 100%;
        height: 100%;
        object-fit: cover;
    }

    .music-art-fallback {
        font-size: 1.2rem;
        color: var(--accent-cyan);
        animation: music-disc-spin 4s linear infinite;
        animation-play-state: paused;
    }

    .music-art-wrap.playing .music-art-fallback {
        animation-play-state: running;
    }

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

    .music-eq {
        position: absolute;
        bottom: 5px;
        right: 5px;
        display: flex;
        align-items: flex-end;
        gap: 2px;
        height: 10px;
        opacity: 0;
        transition: opacity 0.25s ease;
    }

    .music-eq.playing {
        opacity: 1;
    }

    .music-eq span {
        width: 2.5px;
        height: 25%;
        border-radius: 2px;
        background: var(--accent-cyan);
        animation: waveform-bounce 1.1s ease-in-out infinite;
        animation-play-state: paused;
    }

    .music-eq.playing span {
        animation-play-state: running;
    }

    .music-eq span:nth-child(1) { animation-delay: 0s; }
    .music-eq span:nth-child(2) { animation-delay: 0.15s; }
    .music-eq span:nth-child(3) { animation-delay: 0.3s; }
    .music-eq span:nth-child(4) { animation-delay: 0.45s; }
    .music-eq span:nth-child(5) { animation-delay: 0.6s; }

    .music-info {
        flex: 1;
        min-width: 0;
        display: flex;
        flex-direction: column;
    }

    .music-track {
        font-size: 0.88rem;
        font-weight: 600;
        color: var(--text-bright);
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    .music-artist {
        font-size: 0.73rem;
        color: var(--text-main);
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
        margin-bottom: 7px;
    }

    .music-progress-row {
        display: flex;
        align-items: center;
        gap: 8px;
    }

    .music-time {
        font-size: 0.62rem;
        color: var(--text-main);
        flex-shrink: 0;
        min-width: 26px;
        font-family: monospace;
    }

    .music-progress-bg {
        flex: 1;
        height: 4px;
        border-radius: 3px;
        background: rgba(255, 255, 255, 0.08);
        overflow: hidden;
        cursor: pointer;
        position: relative;
    }

    .music-progress-bg:hover {
        height: 6px;
    }

    .music-progress-fill {
        height: 100%;
        width: 0%;
        border-radius: 3px;
        background: var(--gradient-neon);
        pointer-events: none;
    }

    .music-controls {
        display: flex;
        align-items: center;
        gap: 8px;
        margin-top: 14px;
        padding-top: 13px;
        border-top: 1px solid rgba(255, 255, 255, 0.06);
        flex-wrap: wrap;
    }

    .music-btn {
        width: 32px;
        height: 32px;
        flex-shrink: 0;
        border-radius: 50%;
        background: rgba(255, 255, 255, 0.04);
        border: 1px solid rgba(255, 255, 255, 0.08);
        color: var(--text-main);
        font-size: 0.75rem;
        display: flex;
        align-items: center;
        justify-content: center;
        transition: var(--transition-smooth);
    }

    .music-btn:hover {
        color: var(--text-bright);
        border-color: rgba(0, 210, 255, 0.35);
        box-shadow: 0 0 12px rgba(0, 210, 255, 0.15);
    }

    .music-btn.active {
        color: var(--accent-cyan);
        border-color: rgba(0, 210, 255, 0.45);
        background: rgba(0, 210, 255, 0.08);
    }

    .music-btn-play {
        width: 39px;
        height: 39px;
        background: var(--gradient-neon);
        border: none;
        color: var(--bg-main);
        font-size: 0.9rem;
        box-shadow: var(--shadow-neon);
    }

    .music-btn-play:hover {
        color: var(--bg-main);
        transform: scale(1.06);
        box-shadow: var(--shadow-neon);
    }

    .music-volume {
        display: flex;
        align-items: center;
        gap: 6px;
        margin-left: auto;
        color: var(--text-main);
        font-size: 0.75rem;
    }

    .music-volume input[type="range"] {
        -webkit-appearance: none;
        appearance: none;
        width: 64px;
        height: 4px;
        border-radius: 2px;
        background: rgba(255, 255, 255, 0.1);
        outline: none;
    }

    .music-volume input[type="range"]::-webkit-slider-thumb {
        -webkit-appearance: none;
        appearance: none;
        width: 12px;
        height: 12px;
        border-radius: 50%;
        background: var(--accent-cyan);
        box-shadow: 0 0 6px rgba(0, 210, 255, 0.6);
        cursor: pointer;
    }

    .music-volume input[type="range"]::-moz-range-thumb {
        width: 12px;
        height: 12px;
        border: none;
        border-radius: 50%;
        background: var(--accent-cyan);
        box-shadow: 0 0 6px rgba(0, 210, 255, 0.6);
        cursor: pointer;
    }

    .music-playlist-toggle {
        margin-left: 4px;
    }

    .music-playlist {
        max-height: 0;
        overflow: hidden;
        opacity: 0;
        display: flex;
        flex-direction: column;
        gap: 6px;
        transition: max-height 0.35s ease, opacity 0.3s ease, margin-top 0.35s ease;
    }

    .music-playlist.open {
        max-height: 260px;
        overflow-y: auto;
        opacity: 1;
        margin-top: 16px;
        padding-top: 2px;
    }

    .music-playlist-item {
        display: flex;
        align-items: center;
        gap: 12px;
        padding: 10px 14px;
        border-radius: 12px;
        background: rgba(255, 255, 255, 0.02);
        border: 1px solid transparent;
        transition: var(--transition-smooth);
        text-align: left;
        width: 100%;
        color: var(--text-main);
        font-size: 0.85rem;
    }

    .music-playlist-item:hover {
        background: rgba(0, 210, 255, 0.06);
    }

    .music-playlist-item.active {
        color: var(--accent-cyan);
        background: rgba(0, 210, 255, 0.08);
        border-color: rgba(0, 210, 255, 0.25);
    }

    .music-playlist-item i {
        font-size: 0.75rem;
        width: 14px;
        flex-shrink: 0;
    }

    .music-playlist-item .music-playlist-item-title {
        flex: 1;
        min-width: 0;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    .music-playlist-item .music-playlist-item-artist {
        font-size: 0.72rem;
        color: var(--text-main);
        opacity: 0.7;
        flex-shrink: 0;
    }

    .music-playlist-empty {
        text-align: center;
        padding: 18px 10px;
        font-size: 0.82rem;
        font-style: italic;
        color: var(--text-main);
        opacity: 0.7;
    }

    .about-container {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 60px;
        align-items: start;
    }

    .about-text p {
        margin-bottom: 20px;
        font-size: 1.05rem;
    }

    .skills-wrapper {
        display: flex;
        flex-direction: column;
        gap: 20px;
    }

    .skill-box {
        width: 100%;
    }

    .skill-info {
        display: flex;
        justify-content: space-between;
        margin-bottom: 8px;
        font-weight: 500;
        color: var(--text-bright);
    }

    .skill-bar-bg {
        width: 100%;
        height: 10px;
        background-color: rgba(255, 255, 255, 0.05);
        border-radius: 5px;
        overflow: hidden;
        position: relative;
    }

    .skill-bar-progress {
        height: 100%;
        width: 0%;
        background: var(--gradient-neon);
        border-radius: 5px;
        transition: width 1.5s cubic-bezier(0.1, 1, 0.1, 1);
        box-shadow: 0 0 10px rgba(0, 210, 255, 0.7);
    }

    .timeline {
        position: relative;
        max-width: 900px;
        margin: 0 auto;
    }

    .timeline::before {
        content: '';
        position: absolute;
        top: 0;
        bottom: 0;
        left: 20px;
        width: 2px;
        background: rgba(255, 255, 255, 0.1);
    }

    .timeline-item {
        position: relative;
        padding-left: 60px;
        margin-bottom: 40px;
    }

    .timeline-item:last-child {
        margin-bottom: 0;
    }

    .timeline-dot {
        position: absolute;
        left: 11px;
        top: 5px;
        width: 20px;
        height: 20px;
        border-radius: 50%;
        background: var(--bg-main);
        border: 3px solid var(--accent-cyan);
        box-shadow: 0 0 10px var(--accent-cyan);
        transition: var(--transition-smooth);
    }

    .timeline-item:hover .timeline-dot {
        background: var(--accent-purple);
        border-color: var(--accent-purple);
        box-shadow: 0 0 15px var(--accent-purple);
    }

    .timeline-content {
        background: var(--bg-card);
        border: 1px solid rgba(255, 255, 255, 0.05);
        border-radius: 12px;
        padding: 25px;
        transition: var(--transition-smooth);
    }

    .timeline-content:hover {
        transform: translateX(5px);
        border-color: rgba(0, 210, 255, 0.3);
        box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
    }

    .timeline-header {
        display: flex;
        justify-content: space-between;
        align-items: center;
        flex-wrap: wrap;
        gap: 10px;
        margin-bottom: 10px;
    }

    .role-title {
        font-size: 1.25rem;
        color: var(--text-bright);
        font-weight: 600;
    }

    .company-badge {
        font-size: 0.85rem;
        color: var(--accent-cyan);
        background: rgba(0, 210, 255, 0.1);
        padding: 4px 12px;
        border-radius: 20px;
        border: 1px solid rgba(0, 210, 255, 0.2);
    }

    .timeline-period {
        font-size: 0.85rem;
        color: #8b949e;
        margin-bottom: 12px;
        display: flex;
        align-items: center;
        gap: 6px;
    }

    .timeline-desc {
        font-size: 0.95rem;
        color: var(--text-main);
        margin-bottom: 12px;
    }

    .timeline-tags {
        display: flex;
        flex-wrap: wrap;
        gap: 8px;
    }

    .projects-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
        gap: 30px;
    }

    .project-card {
        background-color: var(--bg-card);
        border: 1px solid rgba(255, 255, 255, 0.03);
        border-radius: 16px;
        padding: 30px;
        transition: var(--transition-smooth);
        position: relative;
        overflow: hidden;
        display: flex;
        flex-direction: column;
        justify-content: space-between;
    }

    .project-card::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 4px;
        background: var(--gradient-neon);
        opacity: 0;
        transition: var(--transition-smooth);
    }

    .project-card:hover {
        transform: translateY(-8px) scale(1.02);
        border-color: rgba(0, 210, 255, 0.2);
        box-shadow: var(--shadow-neon);
    }

    .project-card:hover::before {
        opacity: 1;
    }

    .project-top {
        display: flex;
        justify-content: space-between;
        align-items: center;
        margin-bottom: 15px;
    }

    .project-icon {
        font-size: 2rem;
        background: var(--gradient-neon);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
    }

    .project-links a {
        font-size: 1.2rem;
        color: var(--text-main);
        transition: var(--transition-smooth);
        margin-left: 12px;
    }

    .project-links a:hover {
        color: var(--accent-cyan);
    }

    .project-card h3 {
        font-size: 1.4rem;
        color: var(--text-bright);
        margin-bottom: 12px;
    }

    .project-card p {
        font-size: 0.95rem;
        margin-bottom: 20px;
        flex-grow: 1;
    }

    .project-tech {
        display: flex;
        flex-wrap: wrap;
        gap: 10px;
    }

    .tech-badge {
        font-size: 0.8rem;
        background-color: rgba(255, 255, 255, 0.05);
        padding: 4px 12px;
        border-radius: 20px;
        color: var(--accent-cyan);
        border: 1px solid rgba(0, 210, 255, 0.1);
    }

    .hobbies-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
        gap: 25px;
    }

    .hobby-box {
        background-color: var(--bg-card);
        border-radius: 12px;
        padding: 25px;
        text-align: center;
        transition: var(--transition-smooth);
        border: 1px solid rgba(255, 255, 255, 0.02);
    }

    .hobby-box i {
        font-size: 2.5rem;
        margin-bottom: 15px;
        background: var(--gradient-neon);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
    }

    .hobby-box h4 {
        font-size: 1.15rem;
        color: var(--text-bright);
        font-weight: 600;
    }

    .hobby-box:hover {
        transform: translateY(-5px);
        background: rgba(18, 20, 32, 0.7);
        border-color: rgba(155, 93, 235, 0.2);
        box-shadow: 0 10px 20px rgba(155, 93, 235, 0.05);
    }

    footer {
        background-color: #06070a;
        padding: 40px 20px;
        text-align: center;
        border-top: 1px solid rgba(255, 255, 255, 0.03);
        margin-top: 50px;
    }

    footer p {
        font-size: 0.9rem;
        margin-bottom: 15px;
    }

    footer .social-icons {
        justify-content: center;
        transform: scale(0.85);
    }

    .fade-in-up {
        opacity: 0;
        transform: translateY(40px);
        transition: opacity 0.8s ease, transform 0.8s ease;
    }

    .fade-in-up.visible {
        opacity: 1;
        transform: translateY(0);
    }

    @keyframes pulse {
        0% { box-shadow: 0 0 20px rgba(0, 210, 255, 0.2), 0 0 40px rgba(155, 93, 235, 0.2); }
        100% { box-shadow: 0 0 30px rgba(0, 210, 255, 0.5), 0 0 60px rgba(155, 93, 235, 0.5); }
    }

    @media (max-width: 968px) {
        .about-container {
            grid-template-columns: 1fr;
            gap: 40px;
        }
        .hero-top {
            grid-template-columns: 1fr;
            gap: 36px;
            text-align: center;
            max-width: 520px;
        }
        .hero-right {
            align-items: center;
            text-align: center;
        }
        .hero-right .discord-status,
        .hero-right .spotify-player,
        .hero-right .discord-game-card {
            margin-left: auto;
            margin-right: auto;
        }
        .hero h1 {
            font-size: 2.1rem;
        }
    }

    @media (max-width: 768px) {
        .timeline::before {
            left: 10px;
        }

        .timeline-item {
            padding-left: 35px;
        }

        .timeline-dot {
            left: 1px;
        }

        .music-player {
            max-width: 440px;
        }

        .music-player-top {
            flex-direction: column;
            text-align: center;
        }
        .music-info {
            align-items: center;
            text-align: center;
        }
        .music-progress-row {
            width: 100%;
        }
        .music-controls {
            flex-wrap: wrap;
            justify-content: center;
        }
        .music-volume {
            order: 10;
            width: 100%;
            justify-content: center;
        }
    }

    @media (max-width: 576px) {
        .hero h1 {
            font-size: 1.8rem;
        }
        .hero .tagline {
            font-size: 0.9rem;
        }
        .section-title {
            font-size: 2rem;
        }
    }

    /* ============================================================
       Secret Hidden-Pages Menu
       Kích hoạt: giữ tổ hợp phím Ctrl + Alt + Shift (Desktop)
                  hoặc chạm nút chấm ẩn ở cuối trang (Mobile)
       ============================================================ */

    .secret-access-dot {
        display: none;
        position: relative;
        width: 44px;
        height: 44px;
        margin: 8px auto 0;
        background: transparent;
        border: none;
        padding: 0;
        cursor: pointer;
        -webkit-tap-highlight-color: transparent;
    }

    .secret-access-dot::after {
        content: '';
        position: absolute;
        top: 50%;
        left: 50%;
        width: 7px;
        height: 7px;
        border-radius: 50%;
        background: var(--accent-cyan);
        opacity: 0.15;
        transform: translate(-50%, -50%);
        transition: opacity 0.3s ease, box-shadow 0.3s ease, transform 0.3s ease;
    }

    .secret-access-dot:active::after,
    .secret-access-dot:focus-visible::after {
        opacity: 0.8;
        box-shadow: 0 0 10px var(--accent-cyan);
        transform: translate(-50%, -50%) scale(1.4);
    }

    @media (max-width: 768px) {
        .secret-access-dot {
            display: block;
        }
    }

    .secret-menu-backdrop {
        position: fixed;
        inset: 0;
        background: rgba(2, 3, 6, 0.75);
        backdrop-filter: blur(10px);
        -webkit-backdrop-filter: blur(10px);
        z-index: 5000;
        display: flex;
        align-items: center;
        justify-content: center;
        padding: 20px;
        opacity: 0;
        visibility: hidden;
        pointer-events: none;
        transition: opacity 0.3s ease, visibility 0.3s ease;
    }

    .secret-menu-backdrop.active {
        opacity: 1;
        visibility: visible;
        pointer-events: auto;
    }

    .secret-menu {
        position: relative;
        width: 100%;
        max-width: 560px;
        max-height: 85vh;
        overflow-y: auto;
        background: var(--bg-card);
        border: 1px solid rgba(0, 210, 255, 0.25);
        border-radius: 20px;
        padding: 40px 32px 32px;
        box-shadow: var(--shadow-neon), 0 20px 60px rgba(0, 0, 0, 0.6);
        transform: scale(0.92) translateY(10px);
        transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1);
    }

    .secret-menu-backdrop.active .secret-menu {
        transform: scale(1) translateY(0);
    }

    .secret-menu-close {
        position: absolute;
        top: 16px;
        right: 16px;
        width: 36px;
        height: 36px;
        border-radius: 10px;
        background: rgba(255, 255, 255, 0.04);
        border: 1px solid rgba(255, 255, 255, 0.08);
        color: var(--text-main);
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 0.95rem;
        transition: var(--transition-smooth);
    }

    .secret-menu-close:hover {
        color: var(--text-bright);
        border-color: var(--accent-cyan);
        box-shadow: 0 0 12px rgba(0, 210, 255, 0.3);
    }

    .secret-menu-tag {
        font-family: monospace;
        font-size: 0.75rem;
        letter-spacing: 1.5px;
        color: var(--accent-cyan);
        opacity: 0.85;
        margin-bottom: 12px;
    }

    .secret-menu-header h2 {
        font-size: 1.7rem;
        font-weight: 700;
        margin-bottom: 8px;
        background: var(--gradient-neon);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        display: inline-block;
    }

    .secret-menu-header p {
        font-size: 0.9rem;
        color: var(--text-main);
        margin-bottom: 28px;
    }

    .secret-menu-grid {
        display: flex;
        flex-direction: column;
        gap: 14px;
    }

    .secret-menu-card {
        display: flex;
        align-items: center;
        gap: 16px;
        padding: 16px 18px;
        background: rgba(255, 255, 255, 0.02);
        border: 1px solid rgba(255, 255, 255, 0.05);
        border-radius: 14px;
        transition: var(--transition-smooth);
    }

    .secret-menu-card:hover,
    .secret-menu-card:focus-visible {
        border-color: rgba(0, 210, 255, 0.35);
        background: rgba(0, 210, 255, 0.06);
        transform: translateX(4px);
        box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
    }

    .secret-menu-card-icon {
        flex-shrink: 0;
        width: 46px;
        height: 46px;
        border-radius: 12px;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 1.2rem;
        background: rgba(0, 210, 255, 0.08);
        border: 1px solid rgba(0, 210, 255, 0.2);
        color: var(--accent-cyan);
    }

    .secret-menu-card-text {
        flex: 1;
        min-width: 0;
    }

    .secret-menu-card-text h3 {
        font-size: 1rem;
        color: var(--text-bright);
        font-weight: 600;
        margin-bottom: 4px;
    }

    .secret-menu-card-text p {
        font-size: 0.82rem;
        color: var(--text-main);
    }

    .secret-menu-card-arrow {
        flex-shrink: 0;
        font-size: 0.9rem;
        color: var(--text-main);
        transition: var(--transition-smooth);
    }

    .secret-menu-card:hover .secret-menu-card-arrow {
        color: var(--accent-cyan);
        transform: translateX(3px);
    }

    @media (max-width: 480px) {
        .secret-menu {
            padding: 32px 20px 24px;
            border-radius: 16px;
        }
        .secret-menu-header h2 {
            font-size: 1.4rem;
        }
    }