/* Cài đặt chung và reset (Giữ nguyên) */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }

body {
    font-family: 'Montserrat', sans-serif;
    color: #e0e0e0;
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 1rem;
    line-height: 1.7;
    overflow: auto;
    background: linear-gradient(-45deg, #0a0a0a, #1a1a2e, #3a0a3a, #1a1a2e);
    background-size: 400% 400%;
    animation: gradientBG 15s ease infinite;
}

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

/* Container chính (Giữ nguyên) */
.maintenance-container {
    max-width: 750px;
    width: 100%;
    padding: 3rem 2.5rem;
    margin: 2rem 0;
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(15px) saturate(1.5);
    -webkit-backdrop-filter: blur(15px) saturate(1.5);
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.5);
    animation: fadeIn 1.2s cubic-bezier(0.25, 1, 0.5, 1);
}

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

/* Icon (Giữ nguyên) */
.icon {
    width: 60px;
    height: 60px;
    color: #c998ff;
    margin-bottom: 1.5rem;
    animation: floating 3s infinite ease-in-out;
}

@keyframes floating {
    0% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
    100% { transform: translateY(0px); }
}

/* Tiêu đề (Giữ nguyên) */
h1 {
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: 1rem;
    background: linear-gradient(90deg, #ffffff, #d4adff, #ffffff);
    background-size: 200% auto;
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    animation: textGradient 5s linear infinite;
}

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

p {
    font-size: 1.1rem;
    font-weight: 300;
    color: #c0c0c0;
    margin-bottom: 2rem;
}

/* Đồng hồ đếm ngược (Giữ nguyên) */
#countdown-title {
    font-size: 1rem;
    font-weight: 300;
    color: #c998ff;
    margin-bottom: 1rem;
}
#countdown {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 2rem;
}
.time-box {
    background: rgba(0, 0, 0, 0.2);
    padding: 1rem 1.5rem;
    border-radius: 10px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    min-width: 90px;
    border: 1px solid rgba(255, 255, 255, 0.05);
}
.time-box span { display: block; line-height: 1.2; }
.time-box span:first-child { font-size: 2.5rem; font-weight: 700; color: #ffffff; }
.time-box .label { font-size: 0.8rem; font-weight: 300; text-transform: uppercase; color: #c0c0c0; }

/* Nút liên hệ (Giữ nguyên) */
.contact-prompt {
    font-size: 1rem;
    font-weight: 300;
    color: #c0c0c0;
    margin-top: 1rem;
    margin-bottom: 1rem;
}
.contact-links {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}
.contact-button {
    text-decoration: none;
    color: #ffffff;
    padding: 0.8rem 1.5rem;
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.95rem;
    border: 1px solid transparent;
    transition: all 0.3s ease;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    border: 1px solid rgba(255, 255, 255, 0.15);
}
.contact-button i { margin-right: 0.5rem; }
.contact-button:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}
.contact-button.website:hover { border-color: #ffc107; color: #ffc107; }
.contact-button.zalo:hover { border-color: #0068ff; color: #00c6ff; }
.contact-button.telegram:hover { border-color: #2AABEE; color: #2AABEE; }

/* Chữ ký (Giữ nguyên) */
.signature {
    font-size: 0.9rem;
    font-weight: 400;
    color: #888;
    margin-top: 2.5rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 1.5rem;
}

/* Responsive (Giữ nguyên, sẽ thêm responsive cho modal ở dưới) */
@media (max-width: 600px) {
    body { overflow: auto; }
    .maintenance-container {
        padding: 2rem 1rem;
        margin: 1rem 0;
        border: none;
        box-shadow: none;
        background: transparent;
        backdrop-filter: none;
        -webkit-backdrop-filter: none;
    }
    h1 { font-size: 1.8rem; }
    p { font-size: 1rem; }
    .icon { width: 50px; height: 50px; }
    #countdown { gap: 0.5rem; }
    .time-box { padding: 0.8rem; min-width: 70px; flex-basis: 70px; }
    .time-box span:first-child { font-size: 1.8rem; }
    .time-box .label { font-size: 0.7rem; }
    .contact-links { flex-direction: column; gap: 0.8rem; }
    .contact-button { width: 100%; }
}

/* Cài đặt chung và reset */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html, body {
    height: 100%;
}

body {
    font-family: 'Montserrat', sans-serif;
    color: #e0e0e0;
    /* NỀN ĐEN CHUYÊN NGHIỆP */
    background-color: #0d1117; 
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 1rem;
    line-height: 1.7;
    overflow: auto;
}

/* --- HIỆU ỨNG NỀN HẠT (PARTICLES) --- */
#particles-js {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0; /* Nằm dưới nội dung */
}

/* Nội dung chính */
.maintenance-container {
    max-width: 750px;
    width: 100%;
    padding: 3rem 2.5rem;
    margin: 2rem 0;
    border-radius: 20px;
    
    /* Phong cách Glassmorphism */
    background: rgba(27, 31, 41, 0.75); /* Nền tối + mờ */
    backdrop-filter: blur(10px) saturate(1.5);
    -webkit-backdrop-filter: blur(10px) saturate(1.5);
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.5);

    animation: fadeIn 1.2s cubic-bezier(0.25, 1, 0.5, 1);
    
    /* NÂNG CẤP: Phải có z-index để nổi lên trên nền particles */
    position: relative;
    z-index: 1;
}

/* Các style còn lại (Icon, H1, Countdown...)
   Giữ nguyên như các phiên bản trước
*/
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}
.icon {
    width: 60px;
    height: 60px;
    color: #c998ff;
    margin-bottom: 1.5rem;
    animation: floating 3s infinite ease-in-out;
}
@keyframes floating {
    0% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
    100% { transform: translateY(0px); }
}
h1 {
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: 1rem;
    background: linear-gradient(90deg, #ffffff, #d4adff, #ffffff);
    background-size: 200% auto;
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    animation: textGradient 5s linear infinite;
}
@keyframes textGradient {
    to { background-position: 200% center; }
}
p {
    font-size: 1.1rem;
    font-weight: 300;
    color: #c0c0c0;
    margin-bottom: 2rem;
}
#countdown-title {
    font-size: 1rem;
    font-weight: 300;
    color: #c998ff;
    margin-bottom: 1rem;
}
#countdown {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 2rem;
}
.time-box {
    background: rgba(0, 0, 0, 0.2);
    padding: 1rem 1.5rem;
    border-radius: 10px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    min-width: 90px;
    border: 1px solid rgba(255, 255, 255, 0.05);
}
.time-box span { display: block; line-height: 1.2; }
.time-box span:first-child { font-size: 2.5rem; font-weight: 700; color: #ffffff; }
.time-box .label { font-size: 0.8rem; font-weight: 300; text-transform: uppercase; color: #c0c0c0; }

/* Nút liên hệ */
.contact-prompt {
    font-size: 1rem;
    font-weight: 300;
    color: #c0c0c0;
    margin-top: 1rem;
    margin-bottom: 1rem;
}
.contact-links {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}
.contact-button {
    text-decoration: none;
    color: #ffffff;
    padding: 0.8rem 1.5rem;
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.95rem;
    border: 1px solid transparent;
    transition: all 0.3s ease;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    border: 1px solid rgba(255, 255, 255, 0.15);
}
.contact-button i { margin-right: 0.5rem; }
.contact-button:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}
.contact-button.website:hover { border-color: #ffc107; color: #ffc107; }
.contact-button.zalo:hover { border-color: #0068ff; color: #00c6ff; }
.contact-button.telegram:hover { border-color: #2AABEE; color: #2AABEE; }

.signature {
    font-size: 0.9rem;
    font-weight: 400;
    color: #888;
    margin-top: 2.5rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 1.5rem;
}

/* --- MODAL STYLE (Giữ nguyên phong cách chuyên nghiệp) --- */
#modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 1rem;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}
#modal-overlay.show { opacity: 1; visibility: visible; }
#maintenance-modal {
    width: 100%;
    max-width: 460px;
    text-align: left;
    color: #e0e0e0;
    background: #1e202a;
    border-radius: 12px;
    border: 1px solid #3a3d4d;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
    transform: scale(0.95);
    transition: transform 0.3s cubic-bezier(0.25, 1, 0.5, 1);
}
#modal-overlay.show #maintenance-modal { transform: scale(1); }
.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.25rem;
    border-bottom: 1px solid #3a3d4d;
}
.modal-title {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.15rem;
    font-weight: 600;
    color: #ffffff;
}
.modal-title i { color: #007bff; }
.close-button {
    background: #3a3d4d;
    border: none;
    color: #aeb4c4;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1.1rem;
    line-height: 28px;
    transition: background 0.3s;
}
.close-button:hover { background: #4a4d5d; }
.modal-body {
    padding: 1.5rem 1.25rem;
    font-size: 1rem;
    line-height: 1.6;
}
.modal-body p {
    font-size: 0.95rem;
    color: #aeb4c4;
    margin: 0;
}
.modal-footer {
    display: flex;
    gap: 0.75rem;
    padding: 1.25rem;
}
.modal-button {
    flex: 1;
    padding: 0.75rem 1rem;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
    text-align: center;
}
.modal-button i { margin-right: 0.5rem; font-size: 0.85rem; }
.modal-button.btn-secondary {
    background-color: #3a3d4d;
    color: #aeb4c4;
}
.modal-button.btn-secondary:hover { background-color: #4a4d5d; }
.modal-button.btn-primary {
    background-color: #006aff;
    color: #ffffff;
}
.modal-button.btn-primary:hover { background-color: #005ce6; }

/* Responsive (Giữ nguyên) */
@media (max-width: 600px) {
    .maintenance-container {
        padding: 2rem 1rem;
        margin: 1rem 0;
        border: none;
        box-shadow: none;
        background: transparent;
        backdrop-filter: none;
        -webkit-backdrop-filter: none;
    }
    h1 { font-size: 1.8rem; }
    p { font-size: 1rem; }
    .icon { width: 50px; height: 50px; }
    #countdown { gap: 0.5rem; }
    .time-box { padding: 0.8rem; min-width: 70px; flex-basis: 70px; }
    .time-box span:first-child { font-size: 1.8rem; }
    .time-box .label { font-size: 0.7rem; }
    .contact-links { flex-direction: column; gap: 0.8rem; }
    .contact-button { width: 100%; }
}
@media (max-width: 500px) {
    .modal-footer { flex-direction: column; }
}