* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: Arial, sans-serif;
    background: #1f1147;
    color: white;
}

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background:
        linear-gradient(135deg, rgba(55, 18, 105, 0.95), rgba(22, 10, 55, 0.96)),
        radial-gradient(circle at top left, rgba(0, 200, 255, 0.18), transparent 30%),
        radial-gradient(circle at bottom right, rgba(255, 0, 150, 0.15), transparent 30%);
    position: relative;
    text-align: center;
    padding: 40px 20px;
}

.content {
    max-width: 900px;
    position: relative;
    z-index: 2;
}

.logo-box {
    width: 84px;
    height: 84px;
    margin: 0 auto 24px;
    border-radius: 22px;
    background: linear-gradient(135deg, #33c3ff, #7a5cff, #ff5ea8);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 30px;
    font-weight: bold;
    color: white;
    box-shadow: 0 10px 30px rgba(0,0,0,0.25);
}

h1 {
    font-size: 72px;
    font-weight: 700;
    margin-bottom: 18px;
}

.subtitle {
    font-size: 28px;
    line-height: 1.4;
    margin-bottom: 20px;
    color: rgba(255,255,255,0.95);
}

.desc {
    font-size: 20px;
    line-height: 1.8;
    color: rgba(255,255,255,0.82);
    max-width: 760px;
    margin: 0 auto 34px;
}

.buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    text-decoration: none;
    padding: 16px 30px;
    border-radius: 14px;
    font-size: 18px;
    font-weight: 600;
    transition: 0.25s ease;
}

.btn.primary {
    background: white;
    color: #2a145e;
}

.btn.primary:hover {
    transform: translateY(-2px);
}

.btn.secondary {
    border: 1px solid rgba(255,255,255,0.35);
    color: white;
    background: rgba(255,255,255,0.08);
}

.btn.secondary:hover {
    background: rgba(255,255,255,0.14);
}

@media (max-width: 768px) {
    h1 {
        font-size: 48px;
    }

    .subtitle {
        font-size: 22px;
    }

    .desc {
        font-size: 17px;
    }
}


.upload-hero {
    padding: 60px 20px;
}

.upload-card {
    max-width: 760px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255,255,255,0.12);
    border-radius: 24px;
    padding: 40px 30px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.25);
}

.upload-form {
    display: flex;
    flex-direction: column;
    gap: 18px;
    align-items: center;
    margin-top: 24px;
}

.file-input {
    width: 100%;
    max-width: 520px;
    padding: 14px;
    border-radius: 12px;
    border: 1px solid rgba(255,255,255,0.2);
    background: rgba(255,255,255,0.08);
    color: white;
}

.message-box {
    margin-top: 24px;
    padding: 16px 20px;
    border-radius: 14px;
    background: rgba(255,255,255,0.12);
    color: white;
    font-size: 16px;
}

.preview-card {
    max-width: 1200px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255,255,255,0.12);
    border-radius: 24px;
    padding: 40px 30px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.25);
}

.table-wrapper {
    width: 100%;
    overflow-x: auto;
    margin-top: 28px;
    border-radius: 18px;
    background: rgba(255,255,255,0.05);
    padding: 12px;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    min-width: 700px;
    color: white;
}

.data-table th,
.data-table td {
    border: 1px solid rgba(255,255,255,0.14);
    padding: 12px 14px;
    text-align: left;
    font-size: 15px;
}

.data-table th {
    background: rgba(255,255,255,0.12);
    font-weight: 700;
}

.data-table tr:nth-child(even) {
    background: rgba(255,255,255,0.04);
}