:root {
    --bg: #070816;
    --card: rgba(18, 20, 44, 0.65);
    --card-border: rgba(255, 255, 255, 0.08);
    --text: #e2e8f0;
    --muted: #94a3b8;
    --heading: #f8fafc;
    --accent: #8b5cf6;
    --accent-2: #38bdf8;
    --shadow: 0 20px 40px rgba(0, 0, 0, 0.35);
    --radius: 24px;
    --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

:root[data-theme="light"] {
    --bg: #eef2ff;
    --card: rgba(255, 255, 255, 0.72);
    --card-border: rgba(255, 255, 255, 0.9);
    --text: #1e293b;
    --muted: #64748b;
    --heading: #1e1b4b;
    --shadow: 0 20px 40px rgba(99, 102, 241, 0.15);
}

:root[data-theme="light"] body {
    background: url("bg-light.svg") center / cover no-repeat fixed, var(--bg);
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: "Segoe UI", Arial, sans-serif;
    color: var(--text);
    background: var(--bg);
    line-height: 1.7;
    overflow-x: hidden;
    transition: background 0.4s, color 0.4s;
}

/* ---------- Chuyển trang: mờ dần khi vào và khi rời ---------- */
body.page-enter {
    animation: pageIn 0.6s var(--ease) both;
}

body.page-leave {
    animation: pageOut 0.35s ease-in both;
}

/* Chỉ dùng độ mờ, KHÔNG dùng transform trên body:
   transform làm quầng sáng (position: fixed) bị lệch theo độ cuộn. */
@keyframes pageIn {
    from { opacity: 0; }
    to   { opacity: 1; }
}

@keyframes pageOut {
    to { opacity: 0; }
}

/* ---------- Thanh tiến độ khi cuộn ---------- */
.progress {
    position: fixed;
    top: 0;
    left: 0;
    height: 4px;
    width: 0;
    z-index: 20;
    background: linear-gradient(90deg, var(--accent), var(--accent-2));
    box-shadow: 0 0 10px rgba(56, 189, 248, 0.6);
}

/* ---------- Nền ---------- */
/* Quầng sáng nằm theo tọa độ trang (không cố định trên màn hình),
   nên khi cuộn nó trôi cùng nội dung thay vì đứng yên gây lỗi. */
.glow {
    position: fixed;
    left: 0;
    top: 0;
    width: 420px;
    height: 420px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(139, 92, 246, 0.18), transparent 70%);
    will-change: transform;
    pointer-events: none;
    z-index: -1;
    opacity: 0;
    transition: opacity 0.4s;
}

.glow.active {
    opacity: 1;
}

#stars {
    position: fixed;
    inset: 0;
    z-index: -2;
    pointer-events: none;
}

/* ---------- Thanh điều hướng ---------- */
.topbar {
    position: sticky;
    top: 12px;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    max-width: 900px;
    margin: 12px auto 0;
    padding: 10px 14px 10px 20px;
    background: var(--card);
    backdrop-filter: blur(14px);
    border: 1px solid var(--card-border);
    border-radius: 999px;
    box-shadow: var(--shadow);
}

.logo {
    font-weight: 800;
    font-size: 1.1rem;
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    text-decoration: none;
}

.topbar nav {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
}

.topbar nav a {
    padding: 6px 12px;
    border-radius: 999px;
    color: var(--muted);
    text-decoration: none;
    font-size: 14px;
    transition: background 0.25s, color 0.25s;
}

.topbar nav a:hover,
.topbar nav a.active {
    background: rgba(139, 92, 246, 0.18);
    color: var(--accent);
}

.icon-btn {
    width: 42px;
    height: 42px;
    border: 1px solid var(--card-border);
    border-radius: 50%;
    background: var(--card);
    color: var(--text);
    font-size: 18px;
    cursor: pointer;
    box-shadow: var(--shadow);
    transition: transform 0.25s;
}

.icon-btn:hover {
    transform: scale(1.12) rotate(8deg);
}

/* ---------- Khung nội dung ---------- */
.container {
    max-width: 900px;
    margin: 28px auto 40px;
    padding: 0 16px;
}

.card {
    background: var(--card);
    backdrop-filter: blur(14px);
    border: 1px solid var(--card-border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 32px;
    margin-bottom: 22px;
    transition: transform 0.35s var(--ease), box-shadow 0.35s;
}

.card:hover {
    box-shadow: 0 28px 50px rgba(0, 0, 0, 0.45);
}

/* ---------- Hiệu ứng cuộn: mỗi kiểu một chuyển động ---------- */
[data-anim] {
    opacity: 0;
    transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
}

[data-anim="up"]    { transform: translateY(50px); }
[data-anim="left"]  { transform: translateX(-60px); }
[data-anim="right"] { transform: translateX(60px); }
[data-anim="zoom"]  { transform: scale(0.85); }

[data-anim].in {
    opacity: 1;
    transform: none;
}

[data-delay="1"] { transition-delay: 0.12s; }
[data-delay="2"] { transition-delay: 0.24s; }
[data-delay="3"] { transition-delay: 0.36s; }
[data-delay="4"] { transition-delay: 0.48s; }

/* ---------- Phần đầu ---------- */
.hero {
    text-align: center;
    padding: 40px 32px;
}

.avatar-wrap {
    display: inline-block;
    padding: 5px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    box-shadow: 0 0 30px rgba(139, 92, 246, 0.45);
    animation: float 4s ease-in-out infinite;
}

.avatar {
    display: block;
    width: 150px;
    height: 150px;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid var(--bg);
    transition: transform 0.4s;
}

.avatar:hover {
    transform: rotate(-6deg) scale(1.05);
}

@keyframes float {
    50% { transform: translateY(-8px); }
}

h1 {
    margin: 18px 0 4px;
    font-size: 2.1rem;
    color: var(--heading);
}

.gradient-text {
    background: linear-gradient(90deg, #c4b5fd, #7dd3fc, #c4b5fd);
    background-size: 200% auto;
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    animation: shine 5s linear infinite;
}

@keyframes shine {
    to { background-position: 200% center; }
}

.role {
    min-height: 1.7em;
    margin: 4px 0;
    color: var(--muted);
    font-style: italic;
}

.school {
    display: inline-block;
    margin: 10px 6px 4px;
    padding: 6px 16px;
    border-radius: 999px;
    background: rgba(56, 189, 248, 0.15);
    color: var(--accent-2);
    font-weight: 600;
}

.address {
    margin: 4px 0;
    color: var(--muted);
    font-size: 15px;
}

.cursor {
    animation: blink 1s steps(1) infinite;
}

@keyframes blink {
    50% { opacity: 0; }
}

/* ---------- Tiêu đề và chữ ---------- */
h2 {
    margin: 0 0 14px;
    color: var(--heading);
    font-size: 1.4rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

h2::before {
    content: "";
    width: 6px;
    height: 22px;
    border-radius: 6px;
    background: linear-gradient(to bottom, var(--accent), var(--accent-2));
}

.section-title {
    margin: 30px 4px 16px;
}

p {
    margin: 8px 0;
}

a {
    color: var(--accent-2);
    text-decoration: none;
    font-weight: 600;
}

a:hover {
    text-decoration: underline;
}

/* ---------- Trang chủ: lưới menu ---------- */
.menu-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
    gap: 16px;
}

.menu-card {
    display: block;
    padding: 24px;
    border-radius: 22px;
    background: var(--card);
    border: 1px solid var(--card-border);
    box-shadow: var(--shadow);
    color: var(--text);
    transition: transform 0.3s var(--ease), box-shadow 0.3s, background 0.3s;
}

.menu-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 20px 36px rgba(139, 92, 246, 0.3);
    text-decoration: none;
}

.menu-card i {
    font-size: 1.8rem;
    color: var(--accent);
    transition: transform 0.4s var(--ease);
}

.menu-card:hover i {
    transform: scale(1.2) rotate(-8deg);
}

.menu-card h3 {
    margin: 12px 0 4px;
    color: var(--heading);
}

.menu-card p {
    margin: 0;
    color: var(--muted);
    font-size: 14px;
    font-weight: normal;
}

/* ---------- Kỹ năng ---------- */
ul.skills {
    list-style: none;
    padding: 0;
    margin: 0;
}

ul.skills li {
    padding: 14px 16px;
    margin-bottom: 12px;
    border-radius: 16px;
    background: rgba(139, 92, 246, 0.08);
}

.skill-head {
    display: flex;
    justify-content: space-between;
    font-size: 15px;
    font-weight: 600;
}

.bar {
    height: 10px;
    margin-top: 8px;
    background: rgba(148, 163, 184, 0.18);
    border-radius: 999px;
    overflow: hidden;
}

.fill {
    width: 0;
    height: 100%;
    border-radius: 999px;
    background: linear-gradient(90deg, var(--accent), var(--accent-2));
    box-shadow: 0 0 12px rgba(56, 189, 248, 0.5);
    transition: width 1.4s var(--ease);
}

/* ---------- Sở thích ---------- */
.hobbies {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
}

.hobby {
    padding: 22px;
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--card-border);
    transition: transform 0.2s, box-shadow 0.3s;
    transform-style: preserve-3d;
}

.hobby:hover {
    box-shadow: 0 16px 30px rgba(139, 92, 246, 0.25);
}

.hobby-icon {
    display: inline-block;
    font-size: 2rem;
    transition: transform 0.4s;
}

.hobby:hover .hobby-icon {
    transform: scale(1.2) rotate(-10deg);
}

.hobby h3 {
    margin: 10px 0 6px;
    color: var(--heading);
}

.hobby p {
    margin: 0;
    color: var(--muted);
    font-size: 15px;
}

/* ---------- Bảng ---------- */
.table-wrap {
    overflow-x: auto;
    border-radius: 16px;
}

table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
}

th {
    background: transparent;
    color: #ffffff;
    text-align: left;
    padding: 14px;
}

th:first-child { border-top-left-radius: 14px; }
th:last-child { border-top-right-radius: 14px; }

td {
    padding: 14px;
    border-bottom: 1px solid var(--card-border);
}

tr:hover td {
    background: rgba(139, 92, 246, 0.1);
}

/* ---------- Liên hệ ---------- */
.contact-links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
    margin-top: 12px;
}

.contact-card {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 18px 20px;
    border-radius: 20px;
    color: #ffffff;
    text-decoration: none;
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.25);
    transition: transform 0.25s, box-shadow 0.25s;
}

.contact-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 18px 32px rgba(0, 0, 0, 0.35);
    text-decoration: none;
}

.contact-card i {
    font-size: 2rem;
    width: 52px;
    height: 52px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.18);
    transition: transform 0.3s;
}

.contact-card:hover i {
    transform: rotate(-8deg) scale(1.08);
}

.contact-card .label {
    display: block;
    font-size: 13px;
    opacity: 0.85;
}

.contact-card .value {
    display: block;
    font-weight: 700;
    word-break: break-all;
}

.contact-card.email    { background: linear-gradient(135deg, #8b5cf6, #3b82f6); }
.contact-card.discord  { background: #5865f2; }
.contact-card.youtube  { background: #ff0000; }
.contact-card.tiktok   { background: #010101; box-shadow: -3px -3px 0 #25f4ee, 3px 3px 0 #fe2c55; }
.contact-card.facebook { background: #1877f2; }

.chip {
    margin-top: 14px;
    padding: 6px 14px;
    font-size: 13px;
    border: 1px solid var(--card-border);
    border-radius: 999px;
    background: rgba(139, 92, 246, 0.12);
    color: var(--text);
    cursor: pointer;
    transition: background 0.2s;
}

.chip:hover {
    background: rgba(139, 92, 246, 0.3);
}

#contact-form {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

#contact-form input,
#contact-form textarea {
    padding: 14px 16px;
    font: inherit;
    color: var(--text);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--card-border);
    border-radius: 16px;
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s, background 0.2s;
}

#contact-form input:focus,
#contact-form textarea:focus {
    border-color: var(--accent-2);
    background: rgba(255, 255, 255, 0.08);
    box-shadow: 0 0 0 4px rgba(56, 189, 248, 0.2);
}

#contact-form input.invalid,
#contact-form textarea.invalid {
    border-color: #f87171;
}

.error {
    color: #f87171;
    font-size: 13px;
    min-height: 1em;
    padding-left: 6px;
}

.btn {
    position: relative;
    overflow: hidden;
    align-self: flex-start;
    margin-top: 10px;
    padding: 13px 28px;
    font: inherit;
    font-weight: 700;
    color: #ffffff;
    background: linear-gradient(135deg, var(--accent), #3b82f6);
    border: none;
    border-radius: 999px;
    cursor: pointer;
    box-shadow: 0 10px 20px rgba(139, 92, 246, 0.35);
    transition: transform 0.2s, box-shadow 0.2s;
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 14px 26px rgba(139, 92, 246, 0.5);
}

#form-status {
    color: #4ade80;
    font-weight: 600;
    min-height: 1.5em;
}

.ripple {
    position: absolute;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    transform: scale(0);
    animation: ripple 0.6s linear;
    pointer-events: none;
}

@keyframes ripple {
    to { transform: scale(4); opacity: 0; }
}

footer {
    text-align: center;
    color: var(--muted);
    font-size: 14px;
    padding-bottom: 36px;
}

/* ---------- Nút lên đầu trang ---------- */
#back-to-top {
    position: fixed;
    left: 22px;
    bottom: 22px;
    opacity: 0;
    transform: translateY(12px);
    pointer-events: none;
    transition: opacity 0.3s, transform 0.3s;
}

#back-to-top.show {
    opacity: 1;
    transform: none;
    pointer-events: auto;
}

/* ---------- Điện thoại ---------- */
@media (max-width: 640px) {
    .topbar {
        flex-direction: column;
        border-radius: 24px;
        gap: 8px;
        top: 8px;
    }

    .card {
        padding: 22px;
    }

    h1 {
        font-size: 1.6rem;
    }

    th, td {
        padding: 10px;
        font-size: 14px;
    }
}

/* ---------- Tôn trọng người dùng bật "giảm chuyển động" ---------- */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        transition: none !important;
        animation: none !important;
        scroll-behavior: auto !important;
    }
    [data-anim] {
        opacity: 1;
        transform: none;
    }
}

/* ---------- Kỹ năng: nhãn "Đang học" và dòng phụ ---------- */
.skill-sub {
    margin: 2px 0 0;
    font-size: 13px;
    color: var(--muted);
}

.badge {
    padding: 2px 10px;
    font-size: 12px;
    border-radius: 999px;
    background: rgba(56, 189, 248, 0.18);
    color: var(--accent-2);
}

/* Thanh "đang học" có sọc chạy để thể hiện đang tiến bộ */
.fill.learning {
    background: repeating-linear-gradient(45deg, var(--accent), var(--accent) 10px, var(--accent-2) 10px, var(--accent-2) 20px);
}
.pct { font-weight: 700; color: var(--accent); margin-left: 4px; }

/* ---------- Nhóm nút điều khiển nổi ở góc dưới bên phải ---------- */
.float-controls {
    position: fixed;
    right: 22px;
    bottom: 22px;
    z-index: 30;
    display: flex;
    flex-direction: column;
    gap: 10px;
}


/* ---------- Trượt ngang giữa các mục (không tải lại trang) ---------- */
:root {
    --top-h: 150px;
}

@media (max-width: 640px) {
    :root {
        --top-h: 200px;
    }
}

body {
    overflow: hidden;
}

.pager {
    position: relative;
    overflow: hidden;
    margin-top: 16px;
}

.track {
    display: flex;
    transition: transform 0.6s var(--ease);
    will-change: transform;
}

.page {
    flex: 0 0 100%;
    height: calc(100vh - var(--top-h));
    height: calc(100dvh - var(--top-h));
    overflow-y: auto;
    padding: 8px 16px 40px;
}

.page-inner {
    max-width: 900px;
    margin: 0 auto;
}

.page .card:first-child {
    margin-top: 0;
}

/* ---------- Tối ưu riêng cho điện thoại ---------- */
@media (max-width: 640px) {
    :root {
        --top-h: 150px;
    }

    body {
        font-size: 15px;
    }

    /* Thanh menu: một hàng, vuốt ngang được */
    .topbar {
        top: 6px;
        margin: 6px 10px 0;
        padding: 8px 10px;
        flex-direction: column;
        border-radius: 22px;
        gap: 6px;
    }

    .topbar nav {
        flex-wrap: nowrap;
        overflow-x: auto;
        width: 100%;
        justify-content: flex-start;
        scrollbar-width: none;
    }

    .topbar nav::-webkit-scrollbar {
        display: none;
    }

    .topbar nav a {
        white-space: nowrap;
        font-size: 13px;
        padding: 6px 10px;
    }

    .page {
        padding: 6px 10px 96px;
    }

    .card {
        padding: 18px;
        margin-bottom: 16px;
    }

    .hero {
        padding: 22px 14px;
    }

    .avatar-wrap .avatar {
        width: 120px;
        height: 120px;
    }

    h1 {
        font-size: 1.5rem;
    }

    h2 {
        font-size: 1.2rem;
    }

    .hobbies,
    .contact-links {
        grid-template-columns: 1fr;
    }

    .menu-grid {
        grid-template-columns: 1fr 1fr;
    }

    th, td {
        padding: 8px;
        font-size: 13px;
    }

    /* Nhóm nút sáng/tối, sao, nhạc: xếp ngang ở giữa đáy màn hình */
    .float-controls {
        right: 50%;
        bottom: 12px;
        transform: translateX(50%);
        flex-direction: row;
        gap: 8px;
    }

    .float-controls .icon-btn,
    #back-to-top {
        width: 38px;
        height: 38px;
        font-size: 16px;
    }

    #back-to-top {
        left: 12px;
        bottom: 12px;
    }
}


/* ---------- Câu nói, lượt xem, lời nhắn, playlist ---------- */
.quote {
    font-size: 1.1rem;
    font-style: italic;
    color: var(--heading);
}

.hint {
    font-size: 13px;
    color: var(--muted);
}

#color-pick {
    width: 56px;
    height: 40px;
    border: none;
    background: none;
    cursor: pointer;
    vertical-align: middle;
    margin-right: 8px;
}

#guest-form input,
#guest-form textarea {
    width: 100%;
    padding: 12px 14px;
    margin: 6px 0;
    font: inherit;
    color: var(--text);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--card-border);
    border-radius: 14px;
    outline: none;
}

#guest-form input:focus,
#guest-form textarea:focus {
    border-color: var(--accent-2);
}

#guest-form .btn {
    margin-top: 6px;
}

.message {
    padding: 12px 14px;
    margin-top: 10px;
    border-radius: 16px;
    background: rgba(139, 92, 246, 0.08);
}

.message strong {
    color: var(--heading);
}

.message p {
    margin: 4px 0;
}

.message small {
    color: var(--muted);
}

.playlist-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 14px;
}

.play-card {
    display: block;
    padding: 18px;
    border-radius: 20px;
    background: var(--accent);
    color: #ffffff;
    text-decoration: none;
    transition: transform 0.25s;
}

.play-card:hover {
    transform: translateY(-4px);
    text-decoration: none;
}

.play-card h3 {
    margin: 0 0 6px;
    color: #ffffff;
}

.play-card p {
    margin: 0;
    font-size: 14px;
    opacity: 0.9;
}


/* ---------- Gợn sóng gọn trong nút, không tràn ra ngoài ---------- */
.icon-btn,
.chip {
    position: relative;
    overflow: hidden;
}

#back-to-top {
    position: fixed;
}

.ripple {
    background: rgba(255, 255, 255, 0.3);
}

@keyframes ripple {
    to { transform: scale(2.2); opacity: 0; }
}

/* ---------- Thanh cuộn mảnh, hợp với giao diện ---------- */
.page {
    scrollbar-width: thin;
    scrollbar-color: rgba(139, 92, 246, 0.45) transparent;
}

.page::-webkit-scrollbar {
    width: 6px;
}

.page::-webkit-scrollbar-track {
    background: transparent;
}

.page::-webkit-scrollbar-thumb {
    background: rgba(139, 92, 246, 0.45);
    border-radius: 6px;
}

.page::-webkit-scrollbar-thumb:hover {
    background: rgba(139, 92, 246, 0.7);
}

/* Đẩy nhóm nút sang trái một chút để không chạm thanh cuộn */
.float-controls {
    right: 28px;
}

/* ---------- Ẩn thanh cuộn: vẫn cuộn bằng chuột, cảm ứng, con lăn ---------- */
.page {
    scrollbar-width: none;
}

.page::-webkit-scrollbar {
    display: none;
}


/* ---------- Bảng chọn màu nổi phía trên nhóm nút ---------- */
.color-panel {
    position: absolute;
    bottom: calc(100% + 12px);
    right: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    min-width: 170px;
    padding: 14px 16px;
    background: var(--card);
    backdrop-filter: blur(14px);
    border: 1px solid var(--card-border);
    border-radius: 20px;
    box-shadow: var(--shadow);
}

.color-panel[hidden] {
    display: none;
}

.panel-title {
    margin: 0;
    font-size: 14px;
    font-weight: 600;
    color: var(--heading);
}

.color-panel #color-pick {
    width: 100%;
    height: 44px;
    padding: 0;
    border: none;
    background: none;
    cursor: pointer;
}

.color-panel .chip {
    margin: 0;
}


/* ---------- Tiêu đề bảng: thanh 2 màu liền mạch ---------- */
thead {
    background: linear-gradient(90deg, var(--accent), var(--accent-2));
}

/* ---------- Bảng chọn màu gọn, đẹp ---------- */
.color-panel {
    min-width: 200px;
}

.swatches {
    display: grid;
    grid-template-columns: repeat(3, 34px);
    gap: 10px;
}

.swatch {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    border: 2px solid rgba(255, 255, 255, 0.6);
    cursor: pointer;
    transition: transform 0.2s;
}

.swatch:hover {
    transform: scale(1.15);
}

.custom-row {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 13px;
    color: var(--muted);
}

.color-panel .panel-title {
    font-size: 15px;
}

.color-panel #color-pick {
    width: 44px;
    height: 30px;
}

/* ---------- Liên hệ: kính mờ, màu dịu, phát sáng nhẹ ---------- */
.contact-card {
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.14);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
    cursor: pointer;
}

.contact-card:hover {
    box-shadow: 0 16px 40px rgba(139, 92, 246, 0.35);
}

.contact-card.email    { background: linear-gradient(135deg, rgba(139, 92, 246, 0.5), rgba(59, 130, 246, 0.4)); }
.contact-card.discord  { background: rgba(88, 101, 242, 0.5); }
.contact-card.youtube  { background: rgba(255, 0, 0, 0.42); }
.contact-card.tiktok   { background: rgba(0, 0, 0, 0.55); box-shadow: -3px -3px 0 rgba(37, 244, 238, 0.5), 3px 3px 0 rgba(254, 44, 85, 0.5); }
.contact-card.facebook { background: rgba(24, 119, 242, 0.5); }
.contact-card.github   { background: rgba(36, 41, 47, 0.65); }

/* Hiệu ứng nhỏ khi bấm vào thẻ liên hệ */
.contact-card:active {
    transform: scale(0.97);
}


/* ---------- Thẻ liên hệ: màu rực, phát sáng ---------- */
.contact-card {
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    border: none;
    transition: transform 0.25s, box-shadow 0.25s, filter 0.25s;
}

.contact-card:hover {
    transform: translateY(-4px);
    filter: brightness(1.12);
}

.contact-card.email {
    background: linear-gradient(135deg, #8b5cf6, #3b82f6);
    box-shadow: 0 0 22px rgba(139, 92, 246, 0.75), inset 0 1px 0 rgba(255, 255, 255, 0.35);
}

.contact-card.discord {
    background: linear-gradient(135deg, #5865f2, #7c83ff);
    box-shadow: 0 0 22px rgba(88, 101, 242, 0.75), inset 0 1px 0 rgba(255, 255, 255, 0.35);
}

.contact-card.youtube {
    background: linear-gradient(135deg, #ff0033, #ff5e62);
    box-shadow: 0 0 22px rgba(255, 0, 51, 0.7), inset 0 1px 0 rgba(255, 255, 255, 0.35);
}

.contact-card.tiktok {
    background: linear-gradient(135deg, #111111, #262626);
    box-shadow: -3px -3px 0 #25f4ee, 3px 3px 0 #fe2c55, 0 0 22px rgba(254, 44, 85, 0.45);
}

.contact-card.facebook {
    background: linear-gradient(135deg, #1877f2, #3b9cff);
    box-shadow: 0 0 22px rgba(24, 119, 242, 0.75), inset 0 1px 0 rgba(255, 255, 255, 0.35);
}

.contact-card.github {
    background: linear-gradient(135deg, #4b5563, #9ca3af);
    box-shadow: 0 0 22px rgba(156, 163, 175, 0.6), inset 0 1px 0 rgba(255, 255, 255, 0.35);
}

.contact-card:hover {
    box-shadow: 0 0 34px rgba(255, 255, 255, 0.35), inset 0 1px 0 rgba(255, 255, 255, 0.35);
}


/* Khi đang bấm giữ chuột: không bôi xanh chữ */
body.pressing,
body.pressing * {
    -webkit-user-select: none;
    user-select: none;
}

/* ---------- Thẻ liên hệ đều nhau ---------- */
.contact-links {
    grid-template-columns: repeat(3, 1fr);
    grid-auto-rows: 1fr;
}

.contact-card {
    min-height: 92px;
    min-width: 0;
    align-items: center;
}

.contact-card > i {
    flex-shrink: 0;
}

.contact-card > div {
    min-width: 0;
}

.contact-card .value {
    font-size: 0.95rem;
    overflow-wrap: anywhere;
    word-break: normal;
    white-space: normal;
}

/* TikTok: viền neon đều bốn phía, không lệch */
.contact-card.tiktok {
    box-shadow: 0 0 0 1px rgba(37, 244, 238, 0.7), 0 0 0 2px rgba(254, 44, 85, 0.45), 0 0 22px rgba(254, 44, 85, 0.35);
}

@media (max-width: 900px) {
    .contact-links {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .contact-links {
        grid-template-columns: 1fr;
    }
}


/* ---------- Trạng thái Discord ---------- */
.discord-row {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 600;
    color: var(--heading);
}

.status-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: #6b7280;
    box-shadow: 0 0 10px currentColor;
    color: #6b7280;
    transition: background 0.3s, color 0.3s;
}


/* Trạng thái Discord nằm ngay dưới địa chỉ, căn giữa */
.hero .discord-row {
    justify-content: center;
    margin-top: 10px;
    font-size: 14px;
}

/* Viền ảnh đại diện đổi màu theo trạng thái Discord */
.avatar-wrap {
    background: linear-gradient(135deg, var(--ring, var(--accent)), var(--accent-2));
    transition: background 0.4s;
}


/* Chấm trạng thái Discord trên ảnh đại diện */
.avatar-wrap {
    position: relative;
}

.avatar-status {
    position: absolute;
    right: 8px;
    bottom: 8px;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background: #6b7280;
    border: 5px solid var(--bg);
    transition: background 0.3s;
}


/* Ẩn khi không có dữ liệu Discord */
.discord-row[hidden],
.discord-activity[hidden] {
    display: none;
}

.discord-activity {
    margin: 6px 0 0;
    font-size: 14px;
    color: var(--muted);
    text-align: center;
}

.discord-activity .act-label {
    margin-right: 6px;
    font-weight: 600;
    color: var(--accent-2);
}


/* Biểu tượng trạng thái kiểu Discord */
.status-dot {
    display: inline-flex;
    width: 18px;
    height: 18px;
    background: none;
    box-shadow: none;
}

.status-dot svg,
.avatar-status svg {
    width: 100%;
    height: 100%;
    display: block;
}

.avatar-status {
    width: 36px;
    height: 36px;
    right: 4px;
    bottom: 4px;
    padding: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg);
    border: none;
    border-radius: 50%;
}


/* ---------- Tối ưu riêng cho điện thoại ---------- */
@media (max-width: 640px) {
    /* Bỏ làm mờ nền (rất nặng với điện thoại), thay bằng nền đặc hơn */
    .card,
    .topbar,
    .contact-card,
    .menu-card,
    .message,
    .color-panel {
        backdrop-filter: none !important;
        -webkit-backdrop-filter: none !important;
    }

    .card,
    .topbar,
    .menu-card,
    .message,
    .color-panel {
        background: rgba(18, 20, 44, 0.92);
    }

    body.light .card,
    body.light .topbar,
    :root[data-theme="light"] .card,
    :root[data-theme="light"] .topbar {
        background: rgba(255, 255, 255, 0.95);
    }

    /* Tắt các hiệu ứng lặp liên tục và quầng sáng */
    .glow,
    .avatar-wrap,
    .gradient-text,
    .cursor {
        animation: none !important;
    }

    .glow {
        display: none;
    }

    /* Nhóm nút: căn giữa đúng, không bị lệch khỏi màn hình */
    .float-controls {
        left: 50%;
        right: auto;
        bottom: 12px;
        transform: translateX(-50%);
    }

    .float-controls .icon-btn {
        width: 40px;
        height: 40px;
        font-size: 17px;
    }

    #back-to-top {
        left: 12px;
        bottom: 12px;
        width: 40px;
        height: 40px;
    }

    .page {
        padding-bottom: 100px;
    }

    /* Hạn chế đổ bóng lớn, nặng khi cuộn */
    .card {
        box-shadow: 0 6px 16px rgba(0, 0, 0, 0.25);
    }
}


/* ---------- Menu 3 gạch (chỉ trên điện thoại) ---------- */
.menu-btn {
    display: none;
    position: fixed;
    top: 10px;
    right: 12px;
    z-index: 50;
    width: 44px;
    height: 44px;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    border: 1px solid var(--card-border);
    background: var(--card);
    color: var(--text);
    font-size: 20px;
    cursor: pointer;
    box-shadow: var(--shadow);
}

.mobile-menu {
    display: none;
    position: fixed;
    top: 64px;
    left: 12px;
    right: 12px;
    z-index: 45;
    flex-direction: column;
    gap: 14px;
    padding: 16px;
    border-radius: 22px;
    background: rgba(18, 20, 44, 0.97);
    border: 1px solid var(--card-border);
    box-shadow: var(--shadow);
}

.mobile-menu[hidden] {
    display: none !important;
}

:root[data-theme="light"] .mobile-menu {
    background: rgba(255, 255, 255, 0.97);
}

.mobile-menu nav {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.mobile-menu nav a {
    padding: 12px 14px;
    border-radius: 14px;
    color: var(--text);
    text-decoration: none;
    font-weight: 600;
}

.mobile-menu nav a.active,
.mobile-menu nav a:hover {
    background: rgba(139, 92, 246, 0.18);
    color: var(--accent);
    text-decoration: none;
}

.mobile-actions {
    display: flex;
    justify-content: space-around;
}

.menu-act {
    width: 52px;
    height: 52px;
    border-radius: 50%;
    border: 1px solid var(--card-border);
    background: rgba(255, 255, 255, 0.06);
    font-size: 20px;
    cursor: pointer;
}

@media (max-width: 640px) {
    .topbar {
        display: none !important;
    }

    .menu-btn {
        display: flex;
    }

    .mobile-menu {
        display: flex;
    }

    .float-controls {
        display: none;
    }

    #color-panel {
        position: fixed;
        left: 50%;
        top: 50%;
        transform: translate(-50%, -50%);
        bottom: auto;
        right: auto;
        z-index: 60;
    }

    .pager {
        margin-top: 56px;
    }
}


/* ---------- Lời chào, đếm ngược, chia sẻ ---------- */
.greeting {
    margin: 6px 0 0;
    font-weight: 600;
    color: var(--accent-2);
}

.countdown-text {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--heading);
}

.share-row {
    margin-top: 12px;
}


/* ---------- Hiệu ứng sinh nhật ---------- */
.bday-overlay {
    position: fixed;
    inset: 0;
    z-index: 85;
    pointer-events: none;
    animation: fadeIn 0.4s ease-out;
}

.bday-overlay.dark {
    background: rgba(3, 4, 12, 0.85);
}

.bday-piece {
    position: absolute;
    left: 50%;
    top: 50%;
    animation: burst 1.6s cubic-bezier(0.2, 0.7, 0.3, 1) forwards;
}

/* Tim trắng viền mỏng (chế độ tối) */
.bday-piece.heart {
    font-size: 26px;
    line-height: 1;
    color: #ffffff;
    text-shadow: 0 0 10px rgba(255, 255, 255, 0.6);
    transform: translate(-50%, -50%);
}

/* Sợi pháo cầu vòng (chế độ sáng) */
.bday-piece.streamer {
    width: 6px;
    height: 18px;
    border-radius: 3px;
    transform: translate(-50%, -50%);
}

@keyframes burst {
    from { translate: 0 0; rotate: 0deg; opacity: 1; }
    to   { translate: var(--dx) var(--dy); rotate: var(--rot, 0deg); opacity: 0; }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to   { opacity: 1; }
}

.birthday-pop {
    position: fixed;
    left: 50%;
    top: 50%;
    z-index: 90;
    transform: translate(-50%, -50%);
    width: min(88vw, 380px);
    padding: 26px 24px;
    border-radius: 24px;
    text-align: center;
    color: #ffffff;
    background: linear-gradient(135deg, #8b5cf6, #ec4899, #38bdf8);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.4);
    cursor: pointer;
    animation: popIn 0.6s cubic-bezier(0.22, 1, 0.36, 1) both;
}

.birthday-pop h3 {
    margin: 0 0 10px;
    font-size: 1.4rem;
    color: #ffffff;
}

.birthday-pop p {
    margin: 0;
    font-size: 1.05rem;
    line-height: 1.6;
}

@keyframes popIn {
    from { transform: translate(-50%, -50%) scale(0.6); opacity: 0; }
    to   { transform: translate(-50%, -50%) scale(1); opacity: 1; }
}


/* ---------- Ô chọn ngôn ngữ ---------- */
.lang-select {
    max-width: 150px;
    padding: 8px 10px;
    border-radius: 999px;
    border: 1px solid var(--card-border);
    background: var(--card);
    color: var(--text);
    font: inherit;
    font-size: 13px;
    cursor: pointer;
    outline: none;
}

.lang-select option {
    background: #161a33;
    color: #e2e8f0;
}


/* ---------- Thẻ hồ sơ Discord ---------- */
[hidden] {
    display: none !important;
}

.dcard {
    max-width: 420px;
    margin: 0 auto 22px;
    padding: 0;
    overflow: hidden;
}

.dc-banner {
    height: 96px;
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
}

.dc-body {
    position: relative;
    padding: 0 22px 22px;
}

.dc-avatar-wrap {
    position: absolute;
    top: -46px;
    left: 22px;
    width: 92px;
    height: 92px;
    border-radius: 50%;
    border: 6px solid var(--card-solid, #161a33);
    background: var(--card-solid, #161a33);
}

.dc-avatar {
    display: block;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    object-fit: cover;
}

.dc-dot {
    position: absolute;
    right: -4px;
    bottom: -4px;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--card-solid, #161a33);
    padding: 3px;
}

.dc-dot svg {
    width: 100%;
    height: 100%;
    display: block;
}

.dc-bubble {
    position: absolute;
    top: -20px;
    left: 130px;
    max-width: 62%;
    padding: 8px 14px;
    border-radius: 14px;
    font-size: 14px;
    background: var(--card-solid, #161a33);
    border: 1px solid var(--card-border);
}

.dc-name {
    margin: 54px 0 0;
    font-size: 1.5rem;
    color: var(--heading);
}

.dc-user {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    margin: 4px 0 10px;
    color: var(--muted);
    font-size: 14px;
}

.dc-pill {
    padding: 3px 10px;
    border-radius: 999px;
    background: rgba(56, 189, 248, 0.15);
    color: var(--accent-2);
    font-size: 12px;
    font-weight: 600;
}

.dc-spotify {
    display: flex;
    gap: 12px;
    padding: 12px;
    margin-top: 12px;
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--card-border);
}

.dc-spotify img {
    width: 56px;
    height: 56px;
    border-radius: 8px;
    object-fit: cover;
    flex-shrink: 0;
}

.dc-sp-info {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    font-size: 13px;
}

.dc-sp-label {
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.04em;
    color: #1db954;
}

.dc-bar {
    height: 4px;
    margin-top: 6px;
    border-radius: 4px;
    overflow: hidden;
    background: rgba(148, 163, 184, 0.25);
}

#dc-fill {
    width: 0;
    height: 100%;
    background: #1db954;
    transition: width 0.9s linear;
}

.dc-times {
    display: flex;
    justify-content: space-between;
    font-size: 11px;
    color: var(--muted);
}

.dc-actions {
    display: flex;
    gap: 10px;
    margin-top: 14px;
}

.dc-btn {
    flex: 1;
    padding: 10px;
    border-radius: 12px;
    border: 1px solid var(--card-border);
    background: rgba(255, 255, 255, 0.06);
    color: var(--text);
    font: inherit;
    font-weight: 600;
    text-align: center;
    text-decoration: none;
    cursor: pointer;
}

.dc-btn.primary {
    border: none;
    color: #ffffff;
    background: linear-gradient(135deg, var(--accent), #3b82f6);
}


/* ---------- Thẻ sở thích ---------- */
.tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin: 10px 0 0;
}

.tag {
    padding: 4px 10px;
    border-radius: 999px;
    font-size: 13px;
    font-weight: 600;
    background: rgba(139, 92, 246, 0.18);
    color: var(--accent);
}

/* ---------- Ngôi sao trên thanh menu ---------- */
.nav-star {
    font-size: 16px;
    color: #fde68a;
    text-shadow: 0 0 8px rgba(253, 230, 138, 0.8);
    animation: twinkle 2.4s ease-in-out infinite;
}

:root[data-theme="light"] .nav-star {
    color: #8b5cf6;
    text-shadow: 0 0 8px rgba(139, 92, 246, 0.5);
}

@keyframes twinkle {
    50% { opacity: 0.45; }
}


/* ---------- Căn giữa bố cục, không bị lệch khi chuyển mục ---------- */
html,
body {
    width: 100%;
    margin: 0;
}

.topbar {
    width: min(900px, calc(100% - 32px));
    margin: 12px auto 0;
}

.topbar .lang-select {
    max-width: 140px;
}

main.pager {
    width: 100%;
    margin-left: 0;
    margin-right: 0;
}

.track {
    width: 100%;
}

.page {
    width: 100%;
    min-width: 0;
}

.page-inner {
    width: min(900px, calc(100% - 32px));
    margin: 0 auto;
}

@media (max-width: 640px) {
    .page-inner {
        width: calc(100% - 20px);
    }
}


/* ---------- Sửa chữ tên bị ảnh đại diện che ---------- */
.dc-avatar-wrap {
    top: -40px;
    width: 84px;
    height: 84px;
}

.dc-name {
    position: relative;
    z-index: 1;
    margin-top: 58px;
    padding-top: 4px;
}