:root {
    --primary: #002253;
    --primary-dark: #00163a;
    --primary-light: #143b7d;
    --background: #f5f7fb;
    --card-bg: #ffffff;
    --text: #1f2933;
    --muted: #5b6470;
    --border: #d9dde5;
    --shadow: 0 18px 40px rgba(0, 24, 61, 0.12);
    --radius: 18px;
}

* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: var(--background);
    color: var(--text);
    min-height: 100%;
}

body.login {
    background: radial-gradient(circle at top left, rgba(0, 34, 83, 0.24), transparent 45%),
        radial-gradient(circle at bottom right, rgba(20, 59, 125, 0.28), transparent 50%),
        var(--background);
}

.wrapper {
    max-width: 1080px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.site-header {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #ffffff;
    padding: 3rem 0 5rem;
    position: relative;
    overflow: hidden;
}

.site-header::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 20% 20%, rgba(255, 255, 255, 0.15), transparent 60%),
        radial-gradient(circle at 80% 0%, rgba(255, 255, 255, 0.12), transparent 65%);
    pointer-events: none;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 2rem;
    position: relative;
    z-index: 1;
}

.header-main {
    display: flex;
    align-items: flex-start;
    gap: 1.5rem;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.header-actions--floating {
    position: absolute;
    top: 1.25rem;
    right: 1.5rem;
    z-index: 2;
}

.header-nav {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.35rem;
    background: rgba(255, 255, 255, 0.12);
    border-radius: 999px;
    backdrop-filter: blur(6px);
}

.nav-link {
    color: #ffffff;
    text-decoration: none;
    padding: 0.5rem 0.9rem;
    border-radius: 999px;
    font-weight: 600;
    transition: background 0.2s ease, transform 0.2s ease;
}

.nav-link:hover,
.nav-link:focus {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-1px);
}

.nav-link.is-active {
    background: #ffffff;
    color: var(--primary);
    box-shadow: 0 12px 30px rgba(0, 24, 61, 0.18);
}

.brand {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.65rem 1rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    backdrop-filter: blur(6px);
    box-shadow: 0 10px 25px rgba(0, 24, 61, 0.15);
}

.brand img {
    width: 150px;
    height: auto;
    display: block;
}

.header-copy {
    max-width: 520px;
}

.eyebrow {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.3em;
    margin: 0 0 0.75rem;
    opacity: 0.85;
}

.eyebrow-muted {
    color: var(--muted);
    opacity: 1;
}

.header-content h1 {
    margin: 0;
    font-size: 2.8rem;
    letter-spacing: 0.02em;
}

.header-content .lead {
    margin-top: 0.75rem;
    line-height: 1.6;
    color: rgba(255, 255, 255, 0.82);
}

.logout {
    background: rgba(255, 255, 255, 0.15);
    color: #ffffff;
    padding: 0.6rem 1.2rem;
    border-radius: 999px;
    text-decoration: none;
    font-weight: 600;
    transition: background 0.3s ease, transform 0.3s ease;
}

.logout:hover,
.logout:focus {
    background: rgba(255, 255, 255, 0.25);
    transform: translateY(-1px);
}

main {
    margin-top: -4rem;
    position: relative;
    z-index: 1;
}

.auth-card {
    display: grid;
    grid-template-columns: minmax(0, 240px) 1fr;
    gap: 2.5rem;
    background: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 3rem;
    align-items: center;
}

.auth-illustration svg {
    width: 140px;
    height: 140px;
    fill: var(--primary);
    filter: drop-shadow(0 16px 30px rgba(0, 34, 83, 0.22));
}

.auth-description {
    margin: 0 0 1.5rem;
    color: var(--muted);
}

.auth-form {
    display: grid;
    gap: 1rem;
}

.auth-form label {
    font-weight: 600;
}

.input-group {
    position: relative;
}

.input-group input {
    width: 100%;
    padding: 0.85rem 1rem;
    border: 1px solid var(--border);
    border-radius: 12px;
    font-size: 1rem;
    transition: border 0.2s ease, box-shadow 0.2s ease;
}

.input-group input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(0, 34, 83, 0.2);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-light), var(--primary));
    border: none;
    color: #ffffff;
    padding: 0.95rem 1.2rem;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn-primary:hover,
.btn-primary:focus {
    transform: translateY(-1px);
    box-shadow: 0 16px 30px rgba(0, 34, 83, 0.24);
    outline: none;
}

.alert {
    background: rgba(235, 87, 87, 0.12);
    border: 1px solid rgba(235, 87, 87, 0.4);
    color: #b42318;
    padding: 0.75rem 1rem;
    border-radius: 12px;
    margin-bottom: 1rem;
}

.toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1.5rem;
    background: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 2rem 2.5rem;
    margin-bottom: 2.5rem;
}

.toolbar h2 {
    margin: 0 0 0.3rem;
}

.toolbar p {
    margin: 0;
    color: var(--muted);
}

.toolbar-search {
    flex: 0 0 340px;
}

.search-field {
    position: relative;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    border: 1px solid var(--border);
    border-radius: 999px;
    padding: 0.35rem 1rem;
    background: #ffffff;
}

.search-field .icon {
    display: flex;
    align-items: center;
}

.search-field .icon i {
    font-size: 1.25rem;
    color: var(--muted);
}

.search-field input {
    border: none;
    flex: 1;
    padding: 0.65rem 0;
    font-size: 0.95rem;
    outline: none;
}

.category {
    margin-bottom: 2.75rem;
}

.category-header {
    display: flex;
    align-items: center;
    gap: 1.2rem;
    margin-bottom: 1.5rem;
}

.category-icon {
    width: 62px;
    height: 62px;
    border-radius: 18px;
    background: rgba(0, 34, 83, 0.12);
    display: grid;
    place-items: center;
}

.category-icon i {
    font-size: 1.75rem;
    color: var(--primary);
}

.category-header h2 {
    margin: 0;
    font-size: 1.4rem;
}

.category-header p {
    margin: 0.4rem 0 0;
    color: var(--muted);
}

.file-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 1.75rem 1.5rem;
}

.file-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 1.5rem;
    box-shadow: var(--shadow);
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    height: 100%;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.file-card:hover,
.file-card:focus-within {
    transform: translateY(-4px);
    box-shadow: 0 18px 45px rgba(15, 23, 42, 0.18);
}

.file-card-main {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 1rem;
    align-items: start;
}

.file-icon {
    width: 56px;
    height: 56px;
    border-radius: 18px;
    background: rgba(0, 34, 83, 0.14);
    display: grid;
    place-items: center;
    transition: background 0.3s ease, transform 0.3s ease;
}

.file-icon i {
    font-size: 26px;
    color: var(--primary);
    transition: color 0.3s ease;
}

.file-card[data-file-icon='pdf'] .file-icon {
    background: #fdecec;
}

.file-card[data-file-icon='pdf'] .file-icon i {
    color: #d14343;
}

.file-card[data-file-icon='word'] .file-icon {
    background: #e2ebff;
}

.file-card[data-file-icon='word'] .file-icon i {
    color: #265cd4;
}

.file-card[data-file-icon='excel'] .file-icon {
    background: #e6f7ef;
}

.file-card[data-file-icon='excel'] .file-icon i {
    color: #1c8b4a;
}

.file-card[data-file-icon='powerpoint'] .file-icon {
    background: #ffe9db;
}

.file-card[data-file-icon='powerpoint'] .file-icon i {
    color: #d86a2e;
}

.file-card[data-file-icon='image'] .file-icon {
    background: #f2eafe;
}

.file-card[data-file-icon='image'] .file-icon i {
    color: #7f45d1;
}

.file-card[data-file-icon='archive'] .file-icon {
    background: #f4eadf;
}

.file-card[data-file-icon='archive'] .file-icon i {
    color: #b96b2c;
}

.file-card[data-file-icon='text'] .file-icon {
    background: #edf1f8;
}

.file-card[data-file-icon='text'] .file-icon i {
    color: #4c5a6b;
}

.file-info h3 {
    margin: 0;
    font-size: 1.05rem;
    font-weight: 600;
}

.file-description {
    margin: 0.4rem 0 0;
    color: var(--muted);
    line-height: 1.6;
    font-size: 0.92rem;
}

.file-card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.file-meta {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    margin: 0;
}

.badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.25rem 0.6rem;
    background: rgba(0, 34, 83, 0.12);
    color: var(--primary-light);
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.08em;
}

.muted {
    color: var(--muted);
    font-size: 0.85rem;
}

.file-action {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    text-decoration: none;
    background: rgba(0, 34, 83, 0.12);
    color: var(--primary-light);
    padding: 0.55rem 0.9rem;
    border-radius: 12px;
    font-weight: 600;
    transition: background 0.2s ease, transform 0.2s ease;
    white-space: nowrap;
}

.file-action svg {
    width: 18px;
    height: 18px;
    fill: currentColor;
}

.file-action:hover,
.file-action:focus {
    background: linear-gradient(135deg, var(--primary-light), var(--primary));
    color: #ffffff;
    transform: translateY(-1px);
}

.status {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.85rem 1rem;
    border-radius: 12px;
    margin: 0 0 1rem;
    border: 1px solid transparent;
}

.status i {
    font-size: 1.25rem;
}

.status-success {
    background: #e6f7ef;
    border-color: #b8e4c9;
    color: #1c8b4a;
}

.status-error {
    background: #fdecea;
    border-color: #f3c5be;
    color: #b42318;
}

.status-container {
    display: grid;
    gap: 0.5rem;
}

.upload-progress {
    background: #f9fbff;
    border: 1px dashed #c3d3e9;
    padding: 1rem 1.25rem;
    border-radius: 12px;
    display: grid;
    gap: 0.5rem;
}

.upload-progress__header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 600;
    color: var(--text);
}

.upload-progress__bar {
    width: 100%;
    height: 12px;
    background: #e8eff9;
    border-radius: 999px;
    overflow: hidden;
    border: 1px solid #d6e2f3;
}

.upload-progress__bar-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, #2a4b8c 0%, #3b6ac9 100%);
    transition: width 0.2s ease-in-out;
}

.upload-progress__percent {
    font-variant-numeric: tabular-nums;
    color: var(--muted);
}

.upload-progress__status {
    margin: 0;
    font-size: 0.95rem;
}

.upload-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 2rem 2.5rem;
    display: grid;
    gap: 1.5rem;
    margin-bottom: 2.5rem;
}

.upload-card__header {
    display: flex;
    justify-content: space-between;
    gap: 2rem;
    align-items: flex-start;
    flex-wrap: wrap;
}

.upload-guidelines {
    background: #f2f6fb;
    border: 1px solid #d9dde5;
    padding: 1rem 1.25rem;
    border-radius: 12px;
    min-width: 260px;
}

.upload-guidelines ul {
    margin: 0.5rem 0 0;
    padding-left: 1.2rem;
    color: var(--muted);
    line-height: 1.6;
}

.upload-form {
    display: grid;
    gap: 1.25rem;
}

.upload-form .btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.empty-state {
    text-align: center;
    padding: 3rem;
    background: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    color: var(--muted);
}

.site-footer {
    margin: 4rem 0 0;
    padding: 2.5rem 0;
    background: #f0f4fb;
    border-top: 1px solid var(--border);
    color: var(--muted);
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.footer-copy {
    margin: 0;
    font-weight: 600;
    color: var(--text);
}

.footer-version,
.footer-updated {
    margin: 0;
    line-height: 1.5;
    font-size: medium;
}

.footer-version strong {
    color: var(--primary);

}

.footer-version a {
    color: var(--primary);

    font-weight: 200;
    text-decoration: none;
}

.footer-version a:hover,
.footer-version a:focus {
    text-decoration: underline;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}

@media (max-width: 900px) {
    .header-content {
        flex-direction: column;
        align-items: flex-start;
    }

    .header-actions--floating {
        position: static;
        width: 100%;
        align-items: flex-start;
    }

    .header-actions {
        flex-direction: column;
        align-items: flex-start;
        width: 100%;
        gap: 0.75rem;
    }

    .header-nav {
        width: 100%;
        flex-wrap: wrap;
    }

    .header-main {
        flex-direction: column;
        align-items: flex-start;
    }

    .brand {
        padding: 0.5rem 0.75rem;
    }

    .toolbar {
        flex-direction: column;
        align-items: stretch;
    }

    .toolbar-search {
        width: 100%;
        flex: 1 1 auto;
    }

    .auth-card {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .auth-illustration {
        justify-self: center;
    }

}

@media (max-width: 600px) {
    .wrapper {
        padding: 0 1rem;
    }

    .site-header {
        padding: 2.5rem 0 4rem;
    }

    main {
        margin-top: -3rem;
    }

    .toolbar {
        padding: 1.5rem;
    }

    .file-card {
        padding: 1.25rem;
        gap: 1rem;
    }

    .file-card-footer {
        flex-direction: column;
        align-items: stretch;
    }

    .file-action {
        width: 100%;
        justify-content: center;
    }

    .brand img {
        width: 130px;
    }

    .footer-content {
        align-items: center;
        text-align: center;
    }
}