* { box-sizing: border-box; }
:root { font-family: "Segoe UI", Arial, sans-serif; color: #1f2937; background: #f4f6f8; }
body { margin: 0; min-height: 100vh; }
.page { min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 32px 16px; }
.card { width: min(680px, 100%); background: white; border-radius: 16px; padding: 40px; box-shadow: 0 10px 35px rgba(0,0,0,.08); }
.brand { display: inline-flex; align-items: center; justify-content: center; width: 52px; height: 52px; border-radius: 12px; background: #111827; color: white; font-weight: 700; letter-spacing: 1px; margin-bottom: 20px; }
h1 { margin: 0 0 10px; font-size: 30px; }
.subtitle { margin: 0 0 28px; color: #6b7280; line-height: 1.5; }
.drop-zone { border: 2px dashed #cbd5e1; border-radius: 14px; padding: 36px 24px; text-align: center; transition: .2s ease; }
.drop-zone.dragover { border-color: #2563eb; background: #eff6ff; }
.upload-icon { font-size: 34px; font-weight: 700; margin-bottom: 8px; }
.drop-zone h2 { margin: 0; font-size: 20px; }
.drop-zone p { color: #6b7280; }
.hint { margin: 20px 0 0; font-size: 13px; }
.button { display: inline-flex; align-items: center; justify-content: center; border: 0; border-radius: 9px; padding: 12px 20px; font-size: 15px; font-weight: 600; cursor: pointer; }
.secondary { background: #e5e7eb; color: #111827; }
.primary { width: 100%; margin-top: 18px; background: #111827; color: white; }
.file-section { margin-top: 28px; }
.hidden { display: none !important; }
.section-title { display: flex; justify-content: space-between; align-items: center; }
.section-title h2 { font-size: 18px; margin: 0; }
.text-button { border: 0; background: transparent; color: #2563eb; cursor: pointer; }
.file-list { list-style: none; padding: 0; margin: 12px 0 0; border: 1px solid #e5e7eb; border-radius: 10px; overflow: hidden; }
.file-list li { display: flex; justify-content: space-between; gap: 16px; padding: 12px 14px; border-bottom: 1px solid #e5e7eb; }
.file-list li:last-child { border-bottom: 0; }
.file-name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.file-size { color: #6b7280; white-space: nowrap; font-size: 13px; }
.status { margin-top: 14px; padding: 12px 14px; border-radius: 9px; background: #f3f4f6; color: #374151; font-size: 14px; }
.security-note { margin: 24px 0 0; text-align: center; color: #9ca3af; font-size: 12px; line-height: 1.5; }
.upload-success {
    text-align: center;
    padding: 40px 20px;
    max-width: 650px;
    margin: 0 auto;
}

.success-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto 20px;
    border-radius: 50%;
    background: #198754;
    color: white;
    font-size: 42px;
    font-weight: bold;
    line-height: 70px;
}

.upload-success h2 {
    margin-bottom: 10px;
}

.success-thanks {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 25px;
}

.success-file-list {
    list-style: none;
    padding: 0;
    margin: 20px 0;
    text-align: left;
}

.success-file-list li {
    padding: 10px 14px;
    margin-bottom: 8px;
    background: #f1f8f4;
    border-radius: 8px;
}

.success-check {
    color: #198754;
    font-weight: bold;
    margin-right: 8px;
}

.success-note {
    margin-top: 25px;
    font-size: 0.9rem;
    opacity: 0.75;
}

.admin-header{
    text-align:center;
    margin-bottom:35px;
}

.admin-card{
    display:flex;
    justify-content:space-between;
    align-items:center;
    padding:18px;
    margin-bottom:15px;
    border-radius:12px;
    background:white;
    box-shadow:0 2px 10px rgba(0,0,0,.08);
}

.admin-info h3{
    margin:0 0 6px;
}

.admin-actions{
    display:flex;
    gap:10px;
}

.admin-actions button{
    padding:8px 16px;
    border:none;
    border-radius:8px;
    cursor:pointer;
}

@media (max-width: 600px) { .card { padding: 28px 20px; } h1 { font-size: 25px; } .file-list li { flex-direction: column; gap: 4px; } }