:root {
    --white: #FFFFFF;
    --beige: #F4F6F9;
    --gray: #DDDDDD;
    --blue: #1E90FF;
    --purple: #886DAF;
    --green: #4CAF50;
    --darkblue: #003670;
    --base: #333333;
    --dark: #2C3E50;
    --black: #000000;
    --red: #F26F21;
}
body {
    font-family: Arial, sans-serif;
    /* margin: 40px; */
    background-color: var(--beige);
    color: #333;
    box-sizing: border-box;
    display: flex;
    min-height: 100vh;
    position: relative;
}
header {
    background-color: var(--white);
    border-bottom: 1px solid var(--red);
    animation-name: border-color-animation;
    animation-duration: 10s;
    animation-iteration-count: infinite
}
@keyframes border-color-animation {
    0% {
        border-color: var(--red);
    }
    50% {
        border-color: var(--purple);
    }
    100% {
        border-color: var(--red);
    }
}
header .logo {
    padding-top: 10px;
    padding-bottom: 10px;
}
header .logo img {
    height: 50px;
}
*, ::after, ::before {
    box-sizing: border-box;
}
main {
    flex: 1 1 auto;
}
main.single-child-centered {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}
/*
.container {
    max-width: 600px;
    margin: 0 auto;
    background-color: white;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}
*/
h1,h2,h3,h4,h5,h6 {
    color: var(--dark);
}

.fw {
    width: 100%;
}

.message {
    padding: 10px;
    margin: 10px 0;
    border-radius: 5px;
}

.error {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.info {
    background-color: #d1ecf1;
    color: #0c5460;
    border: 1px solid #bee5eb;
}

.controls {
    background-color: var(--white);
    padding: 15px;
    border-radius: 8px;
    margin: 20px 0;
    border: 1px solid var(--beige);
}

.controls label {
    font-weight: bold;
    margin-right: 10px;
}

select {
    padding: 8px;
    font-size: 16px;
    border: 1px solid var(--gray);
    border-radius: 4px;
}

.back {
    display: inline-block;
    margin: 20px 0;
    color: var(--blue);
    text-decoration: none;
}

.back:hover {
    text-decoration: underline;
}

details {
    margin-bottom: 15px;
    border: 1px solid var(--gray);
    border-radius: 6px;
    background-color: var(--white);
}

summary {
    padding: 12px;
    background-color: var(--dark);
    color: var(--white);
    cursor: pointer;
    font-weight: bold;
    border-radius: 6px;
    transition: 0.4s background-color linear;
    word-break: break-all;
}
details:open summary {
    border-bottom-left-radius: 0;
    border-bottom-right-radius: 0;
    background-color: var(--blue);
}

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

th,
td {
    border: 1px solid var(--gray);
    padding: 8px;
    text-align: left;
}

th {
    background-color: var(--beige);
    font-weight: bold;
}

tr:nth-child(even) {
    background-color: var(--beige);
}

.footer {
    margin-top: 40px;
    color: #777;
    font-size: 0.9em;
    text-align: center;
}

.stats {
    background-color: #FFFFFF;
    padding: 15px;
    border-radius: 6px;
    margin: 20px 0;
    font-size: 1.1em;
}


.search-box {
    padding: 10px;
    font-size: 16px;
    width: 300px;
    border: 1px solid #ccc;
    border-radius: 5px;
    margin-bottom: 20px;
}

.file-list {
    list-style: none;
    padding: 0;
}
.file-list li {
    margin-left: 0;
}

.file-item {
    padding: 12px 15px;
    background-color: var(--white);
    border: 1px solid var(--gray);
    border-radius: 6px;
    margin-bottom: 8px;
    transition: background 0.2s;
}

.file-item:hover {
    background-color: var(--beige);
    cursor: pointer;
}

.file-link {
    text-decoration: none;
    color: var(--blue);
    font-weight: 500;
}
a.file-link:hover {
    opacity: 1;
}

.file-meta {
    font-size: 0.85em;
    color: #666;
    margin-top: 4px;
}

.no-match {
    color: #999;
    font-style: italic;
}

.file-upload-form .droparea {
    position: relative;
    text-align: center;
    cursor: pointer;
    background-color: var(--white);
}

.preloader {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(255, 255, 255, 0.95);
    z-index: 10;
    display: none; /* Hidden by default */
    flex-direction: column;
    justify-content: center;
    align-items: center;
    border-radius: 6px;
    cursor: progress;
}

.preloader.visible {
    display: flex;
}

.preloader .spinner {
    border: 8px solid var(--gray);
    border-top: 8px solid var(--purple);
    border-radius: 50%;
    width: 60px;
    height: 60px;
    animation: spin 1s linear infinite;
}

.preloader p {
    margin-top: 20px;
    font-size: 1.2em;
    color: var(--dark);
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}
.file-upload-form .droparea input {
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
}
.file-upload-form .droparea img {
    max-width: 50%;
}
.border-color-danger {
    border-color: var(--red) !important; /* A common red color for errors */
}
.btn {
    font-size: 20px;
    padding: 1rem 2.72rem;
    border-radius: 2.8rem;
    cursor: pointer;
    transition: all .4s linear;
}
.btn:disabled {
    cursor: not-allowed;
    background-color: var(--gray);
    border-color: var(--gray);
}
.btn-from-red-to-purple {
    color: var(--white);
    background-color: var(--red);
    border-color: var(--red);
}
.btn-from-red-to-purple:hover {
    background-color: var(--purple);
    border-color: var(--purple);
}
footer {
    background-color: var(--red);
    border-top: 2px dotted var(--white);
    color: var(--white);
    padding: 10px;
}