/* ====== RESET CƠ BẢN ====== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* =============================== */
/*   NỀN MỚI - ĐẸP, MƯỢT, SANG      */
/* =============================== */

body {
    font-family: 'Rajdhani', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
    background: radial-gradient(circle at 50% 0%, #283568 0%, #131a32 50%, #090c17 100%);
    color: #fff;
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
}

/* ----- LỚP 1: SAO MỊN + TRÔI NHẸ ----- */
body::before {
    content: "";
    position: fixed;
    inset: 0;
    z-index: -1;
    pointer-events: none;

    /* sao siêu nhỏ, tự nhiên hơn */
    background-image:
        radial-gradient(circle, rgba(255,255,255,0.35) 1px, transparent 1px),
        radial-gradient(circle, rgba(255,255,255,0.18) 1px, transparent 1px);
    background-size: 140px 140px, 220px 220px; 

    opacity: 0.28;
    animation: starFloat 85s linear infinite;
}

/* ----- LỚP 2: ÁNH SÁNG NEON TỬ NGOẠI (XANH NGỌC + TÍM) ----- */
body::after {
    content: "";
    position: fixed;
    inset: -25%;
    z-index: -2;
    pointer-events: none;

    background:
        radial-gradient(circle at 18% 22%, rgba(0, 255, 200, 0.38), transparent 65%),
        radial-gradient(circle at 78% 75%, rgba(150, 90, 255, 0.40), transparent 65%),
        radial-gradient(circle at 50% 50%, rgba(255, 50, 205, 0.15), transparent 70%);

    filter: blur(85px);
    opacity: 0.85;

    animation: glowShift 22s ease-in-out infinite alternate;
}

/* ----- LỚP 3 (OPTIONAL): GRADIENT CHUYỂN ĐỘNG (TĂNG CHIỀU SÂU) ----- */
.galaxy-gradient {
    position: fixed;
    inset: 0;
    z-index: -3;
    pointer-events: none;

    background: linear-gradient(125deg,
        rgba(0,255,200,0.10),
        rgba(255,60,220,0.06),
        rgba(0,120,255,0.08)
    );
    background-size: 200% 200%;
    animation: gradientMove 25s linear infinite;
}


/* =============================== */
/*           ANIMATIONS            */
/* =============================== */

@keyframes starFloat {
    0%   { background-position: 0 0, 0 0; }
    100% { background-position: -900px 600px, 600px -900px; }
}

@keyframes glowShift {
    0%   { transform: translate(0, 0) scale(1); }
    50%  { transform: translate(-50px, 30px) scale(1.10); }
    100% { transform: translate(30px, -40px) scale(1.04); }
}

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


/* ====== HEADER CHÍNH ====== */
.site-header {
    width: 100%;
    padding: 28px 0 22px;
}

/* Khối gradient chứa logo + stats */
.header-inner {
    width: 80%;
    max-width: 1350px;
    margin: 0 auto;
    padding: 18px 40px;
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;

    background: radial-gradient(circle at top left,
    #05e5cb 0%,      /* xanh ngọc sáng */
    #06a3a1 0%,      /* xanh dương nhạt */
    #065e66 44%,    /* tím xanh hiện đại */
    #1a1d36 100%     /* tím đậm nền */
);
    box-shadow: 0 18px 40px rgba(0,0,0,0.55);
}

/* LOGO */
.header-logo-box {
    display: flex;
    align-items: center;
}

.header-logo {
    height: 60px;            /* chỉnh lại bằng logo thật */
    object-fit: contain;
}

/* STATS BÊN PHẢI */
.header-stats {
    display: flex;
    gap: 40px;
}

.stats-number {
    text-align: right;
}

.stats-value {
    display: block;
    font-size: 26px;
    font-weight: 700;
    color: #35ff89;
    text-shadow: 0 0 12px rgba(53,255,137,0.8);
}

.stats-label {
    display: block;
    font-size: 12px;
    letter-spacing: 1.6px;
    opacity: 0.9;
}

/* ====== 4 Ô MENU BÊN DƯỚI ====== */
.header-menu {
    width: 80%;
    max-width: 1350px;
    margin: 24px auto 0;
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 22px;
}

.menu-card {
    background: rgba(9, 13, 28, 0.92);
    border-radius: 18px;
    padding: 18px 22px;
    display: flex;
    align-items: center;
    gap: 16px;
    border: 1px solid rgba(255,255,255,0.07);
    box-shadow: 0 10px 25px rgba(0,0,0,0.6);
    backdrop-filter: blur(8px);
    transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}

.menu-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 16px 32px rgba(0,255,204,0.35);
    border-color: rgba(0,255,204,0.5);
}

.menu-icon {
    font-size: 32px;
}

.menu-title {
    font-size: 18px;
    font-weight: 600;
}

.menu-sub {
    font-size: 13px;
    color: #a7b4d6;
}

/* ====== RESPONSIVE ====== */
@media (max-width: 992px) {
    .header-inner,
    .header-menu {
        width: 92%;
    }

    .header-inner {
        padding: 16px 22px;
    }

    .header-stats {
        gap: 22px;
    }
}

@media (max-width: 768px) {
    .header-inner {
        
        align-items: flex-start;
        gap: 14px;
    }

    .header-stats {
        width: 100%;
        justify-content: space-between;
    }

    .header-menu {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 520px) {
    .header-menu {
        grid-template-columns: 1fr;
    }
}
/* ========= OFFICIAL ENTRY ========= */

.entry-section {
    margin-top: 0px;
    padding-bottom: 60px;
}

.entry-wrapper {
    width: 80%;
    max-width: 1350px;
    margin: 0 auto;
    padding: 26px 32px 32px;
    border-radius: 24px;
    background: radial-gradient(circle at top left, #14a589 0%, #068177 32%, #1b223a 65%, #14192a 100%);
    box-shadow: 0 20px 50px rgba(0,0,0,0.75);
    position: relative;
}

/* Header title + nút refresh */
.entry-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 5px;
}

.entry-title {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 26px;
    font-weight: 700;
    color: #37ffb3;
    text-shadow: 0 0 10px rgba(55,255,179,0.8);
}

.entry-icon {
    font-size: 26px;
}

.refresh-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  background: linear-gradient(135deg, #00ffc6, #00d4ff);
  color: #000;
  border-radius: 30px;
  border: none;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: 0.25s ease;
  box-shadow: 0 0 10px rgba(0,255,219,0.4);
}

/* Hover – sáng viền mạnh hơn */
.refresh-btn:hover {
  box-shadow: 0 0 20px rgba(0,255,219,0.8);
  transform: translateY(-2px);
}

/* Icon refresh */
.refresh-icon {
  display: inline-block;
  font-size: 18px;
  transition: 0.3s ease;
}

/* Khi nhấn xoay 1 vòng */
.refresh-btn:active .refresh-icon {
  animation: spin 0.6s linear;
}

/* Animation quay */
@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* Loading nâng cao */
.refresh-btn.loading .refresh-icon {
  animation: spin 0.7s linear infinite;
}

/* Grid layout card */
.route-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 8px;
}

/* Card mỗi route */
.route-card {
    position: relative;
}

/* Lớp trong với đường viền trên màu gradient */
.route-card-inner {
    position: relative;
    background: rgba(9, 15, 32, 0.92);
    border-radius: 18px;
    padding: 22px 24px 20px;
    border: 1px solid rgba(255,255,255,0.05);
    box-shadow: 0 10px 30px rgba(0,0,0,0.7);
    overflow: hidden;
}


/* ===== Hover sáng lên cho card ===== */
.route-card-inner:hover {
    box-shadow: 0 0 28px rgba(0, 255, 180, 0.45);
    transform: translateY(-3px);
    transition: 0.2s ease;
}

/* Giúp mượt mà */
.route-card-inner {
    transition: 0.2s ease;
}


/* viền trên gradient giống hình */
.route-card-inner::before {
    content: "";
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 4px;
    background: linear-gradient(90deg, #35ffc2, #ff4ef9, #ffc857);
}

/* top line: domain + ms + status */
.route-top {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: -15px;
}

.route-domain {
    font-size: 16px;
    font-weight: 700;
}

/* Latency */
.route-latency {
    margin-top: 6px;
    font-size: 13px;
}

.latency-value {
    color: #39ff88;
    font-weight: 600;
    font-size: 15px;
    margin-right: 4px;
}

.latency-unit {
    color: #97a0c5;
    font-size: 12px;
}

/* status pill */
.route-status-pill {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px;
    border-radius: 999px;
    background: rgba(16, 95, 51, 0.9);
    font-size: 12px;
    color: #bfffd9;
}

.status-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: #25ff4a;
    box-shadow: 0 0 8px rgba(37,255,74,0.9);
}

/* mô tả route */
.route-desc {
    text-align: right;
    font-size: 14px;
    color: #dde3ff;
    margin-bottom: 3px;
}

/* button row */
.route-actions {
    display: flex;
    gap: 27px;
}

/* dùng chung cho mọi btn */
.btn {
    border: none;
    cursor: pointer;
    font-family: inherit;
    font-weight: 600;
    border-radius: 12px;
    padding: 11px 18px;
    font-size: 14px;
    transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}

/* Enter */
.btn-enter {
    flex: 1;
    background: #00ffcc;
    color: #05101a;
    box-shadow: 0 0 14px rgba(0,255,204,0.65);
}

.btn-enter:hover {
    background: #03d6aa;
    transform: translateY(-1px);
    box-shadow: 0 0 18px rgba(0,255,204,0.85);
}

/* Speed Test */
/* Card sáng khi đang test */
.route-card-inner.testing {
    box-shadow: 0 0 26px rgba(0, 255, 200, 0.65);
}

/* Nút Speed Test khi đang test */
.btn-speed.testing {
    position: relative;
    background: #00ffc8;
    color: #021018;
    border-color: #9be7ff;
    box-shadow: 0 0 20px rgba(0, 255, 200, 0.85);
    transform: translateY(-1px);
    animation: btnPulse 0.9s ease-in-out infinite;
}

/* Vòng sóng lan */
.btn-speed.testing::after {
    content: "";
    position: absolute;
    inset: -2px;
    border-radius: inherit;
    border: 1px solid rgba(255, 255, 255, 0.55);
    opacity: 0.7;
    pointer-events: none;
    animation: ripple 1.1s ease-out infinite;
}

/* Số ms đang test – nhấp nháy + zoom nhẹ */
.latency-testing {
    animation: latencyBlink 0.3s linear infinite alternate;
}

/* ========== KEYFRAMES ========== */

@keyframes btnPulse {
    0%   { transform: translateY(-1px) scale(1); }
    50%  { transform: translateY(-2px) scale(1.03); }
    100% { transform: translateY(-1px) scale(1); }
}

@keyframes ripple {
    0%   { transform: scale(1); opacity: 0.7; }
    100% { transform: scale(1.15); opacity: 0; }
}

@keyframes latencyBlink {
    from { opacity: 0.4; transform: scale(1); }
    to   { opacity: 1;   transform: scale(1.07); }
}

.btn-speed:hover {
    background: #cbe00a;
    box-shadow: 0 0 12px rgba(108,181,255,0.65);
}

/* ========= RESPONSIVE ENTRY ========= */

/* tablet: 2 cột */
@media (max-width: 1024px) {
    .entry-wrapper {
        width: 92%;
        padding: 22px 18px 26px;
    }

    .route-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

/* ========== FOOTER ========== */

.site-footer {
    margin-top: -20px;
    padding-bottom: 40px;
}

/* Hộp announcement */
.announcement {
    width: 80%;
    max-width: 1350px;
    margin: 0 auto 40px;
}

.announcement-inner {
    padding: 26px 34px 26px;
    border-radius: 26px;
    border: 1px solid rgba(255,165,0,0.7);
    background: radial-gradient(circle at top right, rgb(73 189 146 / 45%) 0%, #065e66 40%, rgb(6 103 113 / 96%) 100%);
    box-shadow: 0 20px 40px rgba(0,0,0,0.7);
}

.announcement-title-row {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 18px;
}

.announcement-icon {
    font-size: 20px;
}

.announcement-title {
    font-size: 22px;
    font-weight: 700;
    color: #ffb52c;
}

.announcement-list {
    list-style: none;
    margin: 0;
    padding: 0;
}

.announcement-list li {
    font-size: 15px;
    line-height: 1.7;
    color: #e6eeff;
}

/* Đường kẻ + copy + links */
.footer-bottom {
    width: 80%;
    max-width: 1350px;
    margin: 0 auto;
    padding-top: 22px;
    border-top: 1px solid rgba(255,255,255,0.12);

    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    font-size: 13px;
    color: #d0daf5;
}

.footer-links {
    display: flex;
    gap: 32px;
}

.footer-links a {
    color: #d0daf5;
    text-decoration: none;
    font-size: 13px;
}

.footer-links a:hover {
    color: #ffffff;
}

/* ===== FOOTER RESPONSIVE ===== */

@media (max-width: 1024px) {
    .announcement,
    .footer-bottom {
        width: 92%;
    }

    .announcement-inner {
        padding: 22px 22px 22px;
    }
}

@media (max-width: 768px) {
    .announcement-inner {
        padding: 18px 18px 20px;
        border-radius: 20px;
    }

    .announcement-title {
        font-size: 19px;
    }

    .announcement-list li {
        font-size: 14px;
    }

    .footer-bottom {
        flex-direction: column;
        align-items: flex-start;
        padding-top: 18px;
        gap: 10px;
    }

    .footer-links {
        gap: 18px;
        flex-wrap: wrap;
    }
}

@media (max-width: 480px) {
    .announcement,
    .footer-bottom {
        width: 95%;
        max-width: 420px;
        padding-left: 14px;
        padding-right: 14px;
    }

    .announcement-inner {
        padding: 16px 14px 18px;
    }

    .announcement-title {
        font-size: 18px;
    }

    .announcement-list li {
    }
}


/* mobile: 1 cột + title/nút xếp dọc */
@media (max-width: 768px) {
    /* Giữ cùng 1 dòng, chỉ thu nhỏ spacing */
    .entry-header {
        flex-direction: row;
        align-items: center;
        gap: 10px;
    }

    .route-grid {
        grid-template-columns: 1fr;   /* 1 cột card trên mobile */
    }
}
/* ========= MOBILE 390px (iPhone 12 Pro) ========= */
@media (max-width: 480px) {

    /* Canh tổng thể giống khung giữa như hình */
    .header-inner,
    .header-menu,
    .entry-wrapper {
        width: 95%;
        max-width: 420px;
        margin-left: auto;
        margin-right: auto;
        padding-left: 14px;
        padding-right: 14px;
    }

    .site-header {
        padding-top: 16px;
    }

    /* HEADER TOP */
    .header-inner {
        border-radius: 18px;
        padding: 14px 16px;
    }

    .header-logo {
        height: 48px;
    }

    .header-stats {
        gap: 16px;
    }

    .stats-value {
        font-size: 20px;
    }

    .stats-label {
        font-size: 10px;
        letter-spacing: 1.4px;
    }

    /* 4 ô menu: 2 cột x 2 dòng trên mobile */
    .header-menu {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 12px;
        margin-top: 16px;
    }

    .menu-card {
        padding: 12px 10px;
        border-radius: 14px;
    }

    .menu-icon {
        font-size: 26px;
    }

    .menu-title {
        font-size: 14px;
    }

    .menu-sub {
        font-size: 11px;
    }

    /* OFFICIAL ENTRY BOX */
    .entry-wrapper {
        margin-top: 10px;
        padding: 18px 16px 22px;
        border-radius: 20px;
    }

    .entry-title {
        font-size: 20px;
    }

    .entry-icon {
        font-size: 22px;
    }

    .refresh-btn {
        padding: 8px 16px;
        font-size: 11px;
        border-radius: 22px;
    }

    /* CARD ROUTE */
 /* Card sáng khi đang test */
.route-card-inner.testing {
    box-shadow: 0 0 26px rgba(0, 255, 200, 0.65);
}

/* Nút Speed Test khi đang test */
.btn-speed.testing {
    position: relative;
    background: #00ffc8;
    color: #021018;
    border-color: #9be7ff;
    box-shadow: 0 0 20px rgba(0, 255, 200, 0.85);
    transform: translateY(-1px);
    animation: btnPulse 0.9s ease-in-out infinite;
}

/* Vòng sóng lan */
.btn-speed.testing::after {
    content: "";
    position: absolute;
    inset: -2px;
    border-radius: inherit;
    border: 1px solid rgba(255, 255, 255, 0.55);
    opacity: 0.7;
    pointer-events: none;
    animation: ripple 1.1s ease-out infinite;
}

/* Số ms đang test – nhấp nháy + zoom nhẹ */
.latency-testing {
    animation: latencyBlink 0.3s linear infinite alternate;
}


/* ========== KEYFRAMES ========== */

@keyframes btnPulse {
    0%   { transform: translateY(-1px) scale(1); }
    50%  { transform: translateY(-2px) scale(1.03); }
    100% { transform: translateY(-1px) scale(1); }
}

@keyframes ripple {
    0%   { transform: scale(1); opacity: 0.7; }
    100% { transform: scale(1.15); opacity: 0; }
}

@keyframes latencyBlink {
    from { opacity: 0.4; transform: scale(1); }
    to   { opacity: 1;   transform: scale(1.07); }
}
}
@keyframes starScroll {
    0% {
        background-position: 0 0;
    }
    100% {
        background-position: -600px 800px;  /* hướng trôi + tốc độ */
    }
}
/* ============================== */
/*      NỀN TECH GRID + ICON      */
/* ============================== */

/* Lưới công nghệ (grid) chạy chéo rất nhẹ */
.tech-grid {
    position: fixed;
    inset: 0;
    z-index: -5;
    pointer-events: none;

    background-image:
        linear-gradient(to right, rgba(0, 255, 200, 0.15) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(0, 255, 200, 0.12) 1px, transparent 1px);
    background-size: 120px 120px;
    opacity: 0.22;
    mix-blend-mode: screen;

    animation: techGridMove 35s linear infinite;
}

/* Layer chứa các icon chòm sao */
.constellation-layer {
    position: fixed;
    inset: 0;
    z-index: -4;
    pointer-events: none;
}

/* Icon chòm sao cơ bản */
.constellation-icon {
    position: absolute;
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background:
        radial-gradient(circle at 20% 25%, #ffffff 0%, rgba(255,255,255,0.1) 35%, transparent 60%),
        radial-gradient(circle at 70% 70%, #00ffd5 0%, rgba(0,255,213,0.1) 40%, transparent 70%);
    box-shadow:
        0 0 12px rgba(0,255,213,0.7),
        0 0 40px rgba(0,140,255,0.35);
    opacity: 0.9;
}

/* 2 “icon chòm sao” ở hai góc, tự trôi nhẹ */
.icon-1 {
    top: 18%;
    left: 12%;
    animation: constellationMove1 30s ease-in-out infinite alternate;
}

.icon-2 {
    bottom: 18%;
    right: 10%;
    animation: constellationMove2 36s ease-in-out infinite alternate;
}

/* Thêm vài sao nhỏ bên trong icon cho cảm giác chòm sao */
.constellation-icon::before,
.constellation-icon::after {
    content: "";
    position: absolute;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: #ffffff;
    box-shadow: 0 0 10px rgba(255,255,255,0.9);
}

.constellation-icon::before {
    top: 18px;
    left: 14px;
}

.constellation-icon::after {
    top: 32px;
    right: 12px;
}

/* Có thể vẽ thêm 1 “line” nhỏ nối 2 sao trong icon */
.constellation-icon span {
    position: absolute;
    inset: 0;
}

/* ========== ANIMATION ========== */

/* Grid chạy xiên nhẹ, tạo cảm giác tech */
@keyframes techGridMove {
    0%   { background-position: 0 0, 0 0; }
    100% { background-position: 220px 220px, -220px 220px; }
}

/* Icon 1 trôi theo quỹ đạo nhẹ */
@keyframes constellationMove1 {
    0%   { transform: translate(0, 0) rotate(0deg);     opacity: 0.7; }
    50%  { transform: translate(40px, -30px) rotate(8deg); opacity: 1; }
    100% { transform: translate(-20px, 20px) rotate(-5deg); opacity: 0.85; }
}

/* Icon 2 trôi hướng ngược lại */
@keyframes constellationMove2 {
    0%   { transform: translate(0, 0) rotate(0deg);      opacity: 0.8; }
    50%  { transform: translate(-35px, 25px) rotate(-6deg); opacity: 1; }
    100% { transform: translate(25px, -20px) rotate(4deg); opacity: 0.85; }
}



/* --- Overlay che toàn màn hình khi loading --- */
#page-loader {
  position: fixed;
  inset: 0;
  background: rgba(5, 0, 30, 0.95);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  opacity: 0;
  pointer-events: none;
  transition: 0.3s ease;
}

/* Khi active sẽ hiện */
#page-loader.active {
  opacity: 1;
  pointer-events: auto;
}

/* --- Loader neon --- */
.loader {
  width: 60px;
  height: 60px;
  border: 6px solid rgba(0,255,220,0.2);
  border-top-color: #00ffe0;
  border-radius: 50%;
  animation: spin 0.8s linear infinite, glow 1.2s ease-in-out infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

@keyframes glow {
  0% { box-shadow: 0 0 5px #00ffe0; }
  50% { box-shadow: 0 0 20px #00ffe0; }
  100% { box-shadow: 0 0 5px #00ffe0; }
}
/* ===== LOADING OVERLAY FULL SCREEN ===== */
.route-loader {
  position: fixed;
  inset: 0;
  background: radial-gradient(circle at 50% 0%, #181829 0%, #050510 55%, #020107 100%);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.35s ease;
}

/* khi có class .active thì hiện */
.route-loader.active {
  opacity: 1;
  pointer-events: auto;
}

/* vòng tròn loader */
.loader-ring {
  position: relative;
  width: 70px;
  height: 70px;
  animation: spin-ring 1.1s linear infinite;
}

/* 3 cung tròn màu khác nhau */
.loader-ring .arc {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 4px solid transparent;
}

.loader-ring .arc1 {
  border-top-color: #00ffb9;   /* xanh lá ngọc */
}

.loader-ring .arc2 {
  border-right-color: #ff45ff; /* tím */
  transform: rotate(120deg);
}

.loader-ring .arc3 {
  border-bottom-color: #00d0ff; /* xanh dương */
  transform: rotate(240deg);
}

/* chữ bên dưới */
.loader-text {
  margin-top: 18px;
  font-size: 13px;
  letter-spacing: 0.06em;
  color: #ffffff;
  opacity: 0.85;
}

/* quay vòng */
@keyframes spin-ring {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}

/* style nút refresh cho hợp UI (tuỳ bạn chỉnh) */
.refresh-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 22px;
  border-radius: 999px;
  border: none;
  cursor: pointer;
  background: #02cba5;
  color: #000;
  font-weight: 600;
  transition: 0.2s ease;
}

.refresh-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 0 15px rgba(0,255,200,0.6);
}

.refresh-icon {
  font-size: 16px;
}