/* ================= GLOBAL ================= */
body {
    margin: 0;
    font-family: 'Poppins', sans-serif;
    background-color: #0f1624;
    color: #e0e6f0;
}

a {
    text-decoration: none;
    color: #00fff0;
}

h1, h2, h3 {
    margin: 0 0 10px 0;
}

button {
    cursor: pointer;
    border: none;
    border-radius: 6px;
    font-weight: 600;
    transition: 0.3s;
}

/* ================= HEADER ================= */
.main-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 40px;
    background: #0b0f1a;
    box-shadow: 0 2px 6px rgba(0,0,0,0.5);
    position: sticky;
    top: 0;
    z-index: 100;
}

.logo i {
    margin-right: 10px;
    color: #00fff0;
}

.nav-links a {
    margin: 0 15px;
    font-weight: 500;
    padding: 6px 10px;
    border-radius: 4px;
    transition: 0.3s;
}

.nav-links a:hover,
.nav-links a.active {
    background-color: #00fff0;
    color: #0f1624;
}

/* ================= HERO SECTION ================= */
.hero {
    padding: 40px;
    background: linear-gradient(90deg, #1a2238, #0b0f1a);
    text-align: center;
    border-bottom: 2px solid #1a2a44;
}

.hero h1 {
    font-size: 2rem;
    color: #00fff0;
    margin-bottom: 10px;
}

.hero p {
    font-size: 1rem;
    max-width: 700px;
    margin: 0 auto 20px auto;
    color: #cfd8e8;
}

/* ================= UPLOAD BOX ================= */
.upload-box {
    display: flex;
    gap: 15px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 20px;
}

.upload-box input[type="file"] {
    padding: 8px;
    border-radius: 6px;
    border: 1px solid #1a2a44;
    background-color: #0f1624;
    color: #e0e6f0;
}

.btn-primary {
    padding: 8px 16px;
    background-color: #00fff0;
    color: #0f1624;
}

.btn-primary:hover {
    background-color: #00d4c0;
}

/* ================= FLASH MESSAGES ================= */
.flash-messages {
    margin: 20px auto;
    max-width: 700px;
}

.flash {
    padding: 10px 15px;
    border-radius: 6px;
    margin-bottom: 10px;
    font-weight: 500;
}

.flash.success {
    background-color: #00ff72;
    color: #0f1624;
}

.flash.danger {
    background-color: #ff4d4f;
    color: #fff;
}

/* ================= TABLE DISPLAY ================= */
.table-container {
    margin: 20px auto;
    max-width: 90%;
    overflow-x: auto;
}

.table {
    width: 100%;
    border-collapse: collapse;
}

.table th, .table td {
    padding: 12px;
    border: 1px solid #1a2a44;
    text-align: left;
}

.table th {
    background-color: #0b0f1a;
    color: #00fff0;
}

.table td {
    background-color: #10182d;
    color: #e0e6f0;
}

/* ================= FOOTER ================= */
.footer {
    padding: 20px 40px;
    background-color: #0b0f1a;
    text-align: center;
    border-top: 2px solid #1a2a44;
    color: #cfd8e8;
    font-size: 0.9rem;
}

/* ================= RESPONSIVE ================= */
@media (max-width: 768px) {
    .upload-box {
        flex-direction: column;
        align-items: center;
    }

    .nav-links {
        display: none;
    }
}