:root {
    --primary-color: #bb86fc; /* Màu tím chủ đạo */
    --secondary-color: #03dac6;
    --background-dark: #121212; 
    --card-background: rgba(255, 255, 255, 0.05);
    --text-color: #e0e0e0;
    --border-color: rgba(255, 255, 255, 0.1);
    --hover-effect: rgba(255, 255, 255, 0.08);
}

body {
    margin: 0;
    font-family: 'Poppins', sans-serif;
    background-color: var(--background-dark);
    color: var(--text-color); 
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
}

.particles-background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none; 
    z-index: -1; 
}

.particle {
    position: absolute;
    background-color: rgba(255, 204, 0, 0.7);
    border-radius: 50%; 
    opacity: 0; 
    animation: twinkle 15s infinite ease-in-out;
}

@keyframes twinkle {
    0%, 100% { opacity: 0; transform: scale(0.5); } 
    50% { opacity: 1; transform: scale(1); } 
}

.main-header {
    width: 90%;
    max-width: 1200px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
    margin-bottom: 20px;
    font-size: 1.2em;
    color: var(--primary-color);
    animation: fadeInDown 0.8s ease-out forwards; 
}

.main-header .logo {
    font-weight: 700;
}

.header-icons i {
    margin-left: 20px;
    cursor: pointer;
    transition: color 0.3s ease;
}

.header-icons i:hover {
    color: var(--secondary-color); 
}

.container {
    width: 90%;
    max-width: 600px; 
    display: flex;
    flex-direction: column;
    gap: 20px;
    padding-bottom: 50px;
    transform: none;
    transition: none;
}

.card {
    background: var(--card-background); 
    border-radius: 15px;
    padding: 30px;
    border: 1px solid var(--border-color);
    backdrop-filter: blur(5px); 
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2); 
    transition: transform 0.3s ease, box-shadow 0.3s ease, background-color 0.3s ease; 
    animation: fadeInUp 0.8s ease-out forwards; 
    opacity: 0; /* Ban đầu ẩn */
}

.card:hover {
    transform: translateY(-5px); 
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3); 
    background-color: var(--hover-effect); 
}

h2 {
    color: var(--primary-color);
    margin-top: 0;
    margin-bottom: 20px;
    font-size: 1.8em;
    border-bottom: 1px solid var(--border-color); 
    padding-bottom: 10px;
}

.profile-section {
    text-align: center;
}

.avatar-wrapper {
    position: relative;
    width: 150px;
    height: 150px;
    margin: 0 auto 20px;
    border-radius: 50%;
    overflow: hidden; 
    display: flex;
    justify-content: center;
    align-items: center;
    background: linear-gradient(45deg, var(--primary-color), var(--secondary-color)); 
    padding: 5px; 
    box-shadow: 0 0 0 5px rgba(255, 255, 255, 0.1);
}

.avatar {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    object-fit: cover; 
    display: block;
    border: 3px solid var(--background-dark);
    transition: transform 0.3s ease;
}

.avatar:hover {
    transform: scale(1.05); 
}

.avatar-border-animation {
    position: absolute;
    top: -5px; bottom: -5px; left: -5px; right: -5px;
    border-radius: 50%;
    border: 5px solid transparent;
    background: conic-gradient(from 0deg, var(--primary-color) 0%, var(--secondary-color) 30%, transparent 70%, transparent 100%);
    mask: linear-gradient(#000, #000) padding-box, linear-gradient(#000, #000);
    mask-composite: exclude;
    animation: rotateBorder 5s linear infinite;
    pointer-events: none; 
    z-index: -1; 
}

@keyframes rotateBorder {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.name {
    font-size: 2.5em;
    font-weight: 700;
    margin-bottom: 5px;
    display: flex;
    justify-content: center;
    align-items: center;
    color: #fff;
    text-shadow: 0 0 10px var(--primary-color); 
}

.verified-badge {
    width: 18px;
    height: 18px;
    background-color: #00acee; 
    border-radius: 50%;
    margin-left: 8px;
    position: relative;
    display: inline-block;
    vertical-align: middle;
}

.verified-badge::after {
    content: '\f00c'; 
    font-family: 'Font Awesome 5 Free';
    font-weight: 900;
    color: #fff;
    font-size: 12px;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.slogan {
    font-style: italic;
    color: var(--secondary-color);
    margin-bottom: 15px;
}

.location-github {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-top: 15px;
    font-size: 0.95em;
}

.location-github a {
    color: var(--text-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

.location-github a:hover {
    color: var(--primary-color);
}

.location-github i {
    margin-right: 5px;
}

.bio-section p {
    line-height: 1.6;
    margin-bottom: 15px;
    color: rgba(255, 255, 255, 0.8);
}

.bio-actions {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-top: 20px;
}

.bio-actions .small-image {
    width: 50px;
    height: 50px;
    border-radius: 8px;
    object-fit: cover;
    opacity: 0.8;
}

#iosButton {
    background: #fff;
    color: #222;
    border: 1px solid var(--primary-color);
    transition: background 0.2s, color 0.2s;
}
#iosButton:hover {
    background: var(--primary-color);
    color: #fff;
}
.download-button {
    background-color: var(--primary-color);
    color: var(--background-dark);
    padding: 10px 20px;
    border-radius: 25px;
    text-decoration: none;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: background-color 0.3s ease, transform 0.2s ease;
}

.download-button:hover {
    background-color: var(--secondary-color);
    transform: translateY(-3px); 
}

.locket-buttons-section .button-group {
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: center; 
    gap: 0;
    width: 100%;
    padding: 0 32px;  
    box-sizing: border-box;
}

.locket-buttons-section .button {
    flex: 1 1 0;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 100px;
    min-width: 0;
    max-width: 200px;
    padding: 12px 0;
    border-radius: 10px;
    text-decoration: none;
    font-size: 1em;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.15);
}

.locket-buttons-section .button img {
    width: 20px;
    height: 20px;
    margin-right: 6px;
}

.locket-buttons-section .button-divider {
    width: 1px;
    height: 36px;
    background: rgba(255,255,255,0.15);
    margin: 0 18px;
    border-radius: 2px;
}
.android-button {
    background-color: #A4C639;
    color: #fff;
}

.android-button:hover {
    background-color: #8bb300;
    transform: translateY(-2px);
}

.ios-button {
    background-color: #000; 
    color: #fff;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.ios-button:hover {
    background-color: #333;
    transform: translateY(-2px);
}

.payment-methods {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.payment-item {
    display: flex;
    align-items: center;
    background: rgba(255, 255, 255, 0.08);
    padding: 15px;
    border-radius: 10px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.payment-item:hover {
    background-color: rgba(255, 255, 255, 0.15);
}

.payment-item img {
    width: 30px;
    height: 30px;
    margin-right: 15px;
}

.payment-item p {
    margin: 0;
    font-weight: 600;
}

.payment-item .copy-text {
    font-size: 0.9em;
    color: rgba(255, 255, 255, 0.6);
    display: flex;
    align-items: center;
    gap: 5px;
}

.payment-item .copy-text i {
    cursor: pointer;
    transition: color 0.2s ease;
}

.payment-item .copy-text i:hover {
    color: var(--secondary-color);
}

.picture-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 15px;
}

.gallery-image {
    width: 100%;
    height: 100%; 
    object-fit: contain; 
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    cursor: pointer;
    background: #222; 
}

.gallery-image:hover {
    transform: scale(1.05); 
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.skills-grid {
    display: flex;
    flex-wrap: wrap; 
    gap: 10px;
}

.skill-tag {
    background-color: rgba(var(--primary-color-rgb, 187, 134, 252), 0.2);
    color: var(--primary-color);
    padding: 8px 15px;
    border-radius: 20px;
    font-size: 0.9em;
    font-weight: 500;
    transition: background-color 0.3s ease, transform 0.2s ease;
}

.skill-tag:hover {
    background-color: var(--primary-color);
    color: var(--background-dark);
    transform: translateY(-2px); 
}

.music-player {
    display: flex;
    align-items: center;
    gap: 15px;
    background: rgba(255, 255, 255, 0.08);
    padding: 20px;
    border-radius: 10px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    flex-wrap: wrap;
}

.music-player i {
    font-size: 1.5em;
    color: var(--secondary-color);
}

.music-player p {
    margin: 0;
    flex-grow: 1; 
}

.music-player .current-music {
    font-size: 0.85em;
    color: rgba(255, 255, 255, 0.6);
    margin-right: 15px;
    white-space: nowrap; 
}

.allow-button {
    background-color: var(--secondary-color);
    color: var(--background-dark);
    border: none;
    padding: 10px 20px;
    border-radius: 25px;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.3s ease, transform 0.2s ease;
}

.allow-button:hover {
    background-color: #02a08c;
    transform: translateY(-2px);
}

.main-footer {
    position: fixed; 
    bottom: 0;
    right: 0;
    background-color: rgba(0, 0, 0, 0.5);
    color: rgba(255, 255, 255, 0.7);
    padding: 10px 20px;
    border-top-left-radius: 10px;
    font-size: 0.9em;
    z-index: 1000;
    animation: slideInUp 0.8s ease-out forwards; 
}

@keyframes fadeInDown {
    from { opacity: 0; transform: translateY(-20px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes slideInUp {
    from { transform: translateY(100%); }
    to { transform: translateY(0); }
}

.card:nth-child(1) { animation-delay: 0.2s; }
.card:nth-child(2) { animation-delay: 0.4s; }
.card:nth-child(3) { animation-delay: 0.6s; }
.card:nth-child(4) { animation-delay: 0.8s; }
.card:nth-child(5) { animation-delay: 1.0s; }
.card:nth-child(6) { animation-delay: 1.2s; }
.card:nth-child(7) { animation-delay: 1.4s; }

@media (min-width: 1024px) {
    .container {
        max-width: 900px;
    }
}

@media (max-width: 600px) {
    .locket-buttons-section .button-group {
        display: flex;
        flex-direction: column; 
        gap: 15px;
        padding: 0;
    }
    .locket-buttons-section .button {
        margin: 0;
        width: 100%;
        max-width: 100%;
        padding: 12px 20px;
        font-size: 1em;
    }
    .locket-buttons-section .button img {
        width: 24px;
        height: 24px;
        margin-right: 10px;
    }
    .locket-buttons-section .button-divider {
        display: none;
    }
    .payment-methods {
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 15px;
    }
    .payment-item {
        width: 90%;
        max-width: 300px;
        margin: 0 auto;
        justify-content: center;
    }
    .payment-item + .payment-item::before {
        display: none;
    }
}

@media (min-width: 601px) {
    .payment-methods {
        display: flex;
        flex-direction: row;
        justify-content: center;
        align-items: stretch;
        gap: 0;
        position: relative;
    }
    .payment-item {
        flex: 1 1 0;
        margin: 0 32px;
        max-width: 320px;
        justify-content: flex-start;
    }
    .payment-item + .payment-item {
        position: relative;
    }
    .payment-item + .payment-item::before {
        content: "";
        position: absolute;
        left: -32px;
        top: 15%;
        width: 1px;
        height: 70%;
        background: rgba(255,255,255,0.15);
        border-radius: 2px;
        z-index: 1;
    }
}

.moi img {
    width: 50px;
    height: 50px;
    object-fit: cover;
    border-radius: 8px;
    margin: 0 6px;
    cursor: pointer;
    transition: transform 0.2s;
}
.moi img:hover {
    transform: scale(1.1);
}

/* Pink Animated Button for Popup */
.pink-animated-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 12px 25px;
    border-radius: 8px;
    background-color: #FF69B4; /* Hot Pink */
    color: white;
    text-decoration: none;
    font-weight: 600;
    font-size: 1em;
    border: none;
    cursor: pointer;
    transition: background-color 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease;
    box-shadow: 0 4px 10px rgba(255, 105, 180, 0.4);
}

.pink-animated-button:hover {
    background-color: #FF1493; /* Deeper Pink */
    transform: translateY(-3px);
    box-shadow: 0 6px 15px rgba(255, 105, 180, 0.6);
}

/* Red Animated Close Button */
.close-popup-button {
    padding: 8px 24px;
    border-radius: 8px;
    border: none;
    background: #FF4500; /* OrangeRed - một màu đỏ cam rực rỡ */
    color: #fff;
    font-weight: 600;
    cursor: pointer;
    font-size: 1em;
    transition: background-color 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease;
    box-shadow: 0 2px 8px rgba(255, 69, 0, 0.3); /* Đổ bóng nhẹ màu đỏ cam */
}

.close-popup-button:hover {
    background: #DC143C; /* Crimson - một màu đỏ sẫm hơn */
    transform: translateY(-2px); /* Nâng nhẹ nút lên */
    box-shadow: 0 4px 12px rgba(255, 69, 0, 0.5); /* Đổ bóng mạnh hơn khi di chuột */
}

/* Download Options List in Popup */
.download-options-list {
    margin: 25px 0;
    display: flex;
    flex-direction: column;
    gap: 15px;
    text-align: left;
    width: 100%;
    max-height: 310px; /* Giới hạn chiều cao để hiển thị khoảng 3 mục */
    overflow-y: auto;  /* Thêm thanh cuộn dọc khi cần */
    padding-right: 10px; /* Thêm khoảng trống cho thanh cuộn để không che nội dung */
}

.download-options-list::-webkit-scrollbar {
    width: 8px;
}

.download-options-list::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 10px;
}

.download-options-list::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 10px;
}

.download-options-list::-webkit-scrollbar-thumb:hover {
    background: var(--secondary-color);
}
.download-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: rgba(255, 255, 255, 0.08);
    padding: 15px;
    border-radius: 10px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: background-color 0.3s ease;
}

.download-item:hover {
    background-color: rgba(255, 255, 255, 0.15);
}

.download-info {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.download-name {
    font-weight: 600;
    font-size: 1.1em;
    color: #fff;
}

.download-version {
    font-size: 0.9em;
    color: var(--primary-color); /* Sử dụng màu tím chủ đạo của theme */
}

.download-date {
    font-size: 0.8em;
    color: rgba(255, 255, 255, 0.6);
}

.download-link-button {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    border-radius: 8px;
    background-color: #FF69B4; /* Màu hồng */
    color: white;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9em;
    border: none;
    cursor: pointer;
    transition: background-color 0.3s ease, transform 0.2s ease;
    flex-shrink: 0; /* Ngăn nút bị co lại */
}

.download-link-button:hover {
    background-color: #FF1493; /* Màu hồng đậm hơn */
    transform: scale(1.05);
}

.download-link-button i {
    font-size: 1.1em;
}