:root {
      --bg: #0b0e11;
      --surface: #12161c;
      --border: #1e2329;
      --text: #eaecef;
      --muted: #848e9c;
      --accent: #f0b90b;
    }

    * {
      box-sizing: border-box;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI",
        Roboto, Helvetica, Arial, sans-serif;
      -webkit-tap-highlight-color: transparent;
    }
html {
  margin: 0;
  padding: 0;
  background: radial-gradient(circle at top, #10151c, #0b0e11);
}

    body {
      margin: 0;
      min-height: 100svh;
      background: radial-gradient(circle at top, #10151c, #0b0e11);
      color: var(--text);
      display: flex;
      justify-content: center;
    }
    


    .app {
      width: 100%;
      max-width: 760px;
      padding: 36px 20px 48px;
    }

    /* ===== HEADER ===== */
/* ===== HEADER SYSTEM (SYNC INDEX + SUCCESS) ===== */
.header {
  text-align: center;
  margin-bottom: 28px;
}


.logo {
  height: 40px;          /* CỐ ĐỊNH */
  margin: px 15px;   /* CỐ ĐỊNH */
}

.title {
  font-size: 30px;
  font-weight: 800;
  letter-spacing: .6px;
  margin: 0 0 8px;      /* CỐ ĐỊNH */
}

.title .brand {
  color: #F0B90B;
}

.badge {
  display: inline-block;
  padding: 6px 14px;
  border-radius: 999px;
  background: rgba(240,185,11,.14);
  color: #F0B90B;
  font-size: 13px;
  font-weight: 500;
}

    .subtitle {
      font-size: 15px;
      color: var(--muted);
      margin: 10px
    }

    /* ===== SECURITY NOTICE ===== */
    .security-notice {
      margin: 26px 0;
      padding: 18px 20px;
      border-radius: 18px;
      background: linear-gradient(
        180deg,
        rgba(240,185,11,0.08),
        rgba(240,185,11,0.02)
      );
      border: 1px solid rgba(240,185,11,0.25);
    }

    .security-title {
      font-size: 15px;
      font-weight: 600;
      color: var(--accent);
      margin-bottom: 6px;
    }

    .security-text {
      font-size: 15px;
      line-height: 1.6;
      color: #cdd1d6;
    }

    /* ===== CARD ===== */
    .card {
      max-width: 520px;
      margin: 0 auto;
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: 22px;
      padding: 26px;
      box-shadow: 0 30px 60px rgba(0,0,0,.65);
    }

    /* ===== FORM ===== */
    label {
      display: block;
      margin: 18px 0 8px;
      font-size: 13px;
      color: #cdd1d6;
    }

    input[type="text"] {
      width: 100%;
      height: 48px;
      padding: 0 14px;
      border-radius: 12px;
      background: #0b0e11;
      border: 1px solid var(--border);
      color: var(--text);
      font-size: 15px;
    }

    input::placeholder {
      color: #6f7785;
    }

    /* Upload UI */
    .upload {
      position: relative;
      height: 48px;
      border-radius: 12px;
      background: #0b0e11;
      border: 1px dashed #2b3139;
      display: flex;
      align-items: center;
      padding: 0 14px;
      color: #9aa4b2;
      cursor: pointer;
      transition: all .25s ease;
    }
    .upload:hover {
  border-color: #f0b90b;
  box-shadow: 0 0 0 1px rgba(240,185,11,.25),
              0 8px 20px rgba(240,185,11,.15);
}
.file-name {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: #9aa4b2;
  transition: all .25s ease;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.file-name .check {
  opacity: 0;
  transform: scale(0.6);
  color: #0ecb81; /* Binance green */
  font-style: normal;
  font-weight: 900;
  transition: all .25s ease;
}
.upload.active {
  border-style: solid;
  border-color: #f0b90b;
  background: linear-gradient(
    180deg,
    rgba(240,185,11,.08),
    rgba(240,185,11,.02)
  );
}

.upload.active .file-name {
  color: #ffffff;
}

.upload.active .check {
  opacity: 1;
  transform: scale(1);
}

    .upload span {
      font-size: 14px;
    }

    .upload input {
      position: absolute;
      inset: 0;
      opacity: 0;
      cursor: pointer;
    }

    .hint {
      margin-top: 6px;
      font-size: 12px;
      color: #6f7785;
    }

    .btn {
      width: 100%;
      height: 52px;
      margin-top: 26px;
      border: none;
      border-radius: 16px;
      background: linear-gradient(135deg,#f0b90b,#f8d33a);
      color: #0b0e11;
      font-size: 16px;
      font-weight: 700;
      cursor: pointer;
      box-shadow: 0 14px 32px rgba(240,185,11,.45);
    }
.upload .file-name {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.upload {
  justify-content: space-between;
}

.upload .remove {
  background: none;
  border: none;
  color: #848e9c;
  font-size: 16px;
  cursor: pointer;
  opacity: 0;
  transform: scale(0.8);
  transition: all .2s ease;
}

.upload.active .remove {
  opacity: 1;
  transform: scale(1);
}

.upload .remove:hover {
  color: #f6465d; /* Binance red */
}


    .btn:active {
      transform: scale(.98);
    }

    .footer {
      margin-top: 28px;
      text-align: center;
      font-size: 13px;
      color: #6f7785;
    }
 @media (max-width: 480px) {
      .title { font-size: 26px; }
      .card { padding: 26px 20px 30px; }
    }