:root {
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-tertiary: #21262d;
    --accent-primary: #58a6ff;
    --accent-success: #238636;
    --accent-danger: #da3633;
    --accent-warning: #d29922;
    --text-primary: #c9d1d9;
    --text-secondary: #8b949e;
    --border-color: #30363d;
    --font-family: 'Segoe UI', 'Roboto', -apple-system, BlinkMacSystemFont, sans-serif;
}

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

body {
    font-family: var(--font-family);
    font-size: 14px;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

a {
    color: var(--accent-primary);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 20px;
}

.header {
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    padding: 15px 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 24px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 15px;
}

.main-content {
    padding: 30px 0;
}

.btn {
    display: inline-block;
    padding: 8px 16px;
    border: none;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
}

.btn:hover {
    text-decoration: none;
    opacity: 0.9;
}

.btn-primary {
    background-color: var(--accent-primary);
    color: #fff;
}

.btn-secondary {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-success {
    background-color: var(--accent-success);
    color: #fff;
}

.btn-danger {
    background-color: var(--accent-danger);
    color: #fff;
}

.btn-warning {
    background-color: var(--accent-warning);
    color: #000;
}

.btn-small {
    padding: 5px 10px;
    font-size: 12px;
}

.btn-full {
    width: 100%;
}

.btn-large {
    padding: 12px 24px;
    font-size: 16px;
}

.search-form {
    margin-bottom: 15px;
}

.search-row {
    display: flex;
    gap: 10px;
    align-items: center;
}

.search-row input[type="text"] {
    flex: 1;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 5px;
    color: var(--text-secondary);
    cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
    width: auto;
}

.progress-container {
    margin-top: 15px;
    background-color: var(--bg-tertiary);
    border-radius: 4px;
    height: 20px;
    overflow: hidden;
    position: relative;
}

.progress-bar {
    height: 100%;
    background-color: var(--accent-success);
    width: 0%;
    transition: width 0.2s ease;
}

.progress-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 12px;
    color: var(--text-primary);
    font-weight: 500;
}

.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    color: var(--text-secondary);
    font-size: 13px;
}

input[type="text"],
input[type="password"],
input[type="number"],
input[type="file"] {
    width: 100%;
    padding: 10px 12px;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-primary);
    font-size: 14px;
}

input[type="text"]:focus,
input[type="password"]:focus,
input[type="number"]:focus {
    outline: none;
    border-color: var(--accent-primary);
}

.alert {
    padding: 12px 16px;
    border-radius: 6px;
    margin-bottom: 20px;
}

.alert-success {
    background-color: rgba(35, 134, 54, 0.2);
    border: 1px solid var(--accent-success);
    color: #7ee787;
}

.alert-error {
    background-color: rgba(218, 54, 51, 0.2);
    border: 1px solid var(--accent-danger);
    color: #f85149;
}

.alert-warning {
    background-color: rgba(210, 153, 34, 0.2);
    border: 1px solid var(--accent-warning);
    color: #d29922;
}

.badge {
    display: inline-block;
    padding: 3px 8px;
    border-radius: 12px;
    font-size: 11px;
    font-weight: 500;
}

.badge-primary {
    background-color: rgba(88, 166, 255, 0.2);
    color: var(--accent-primary);
}

.badge-secondary {
    background-color: var(--bg-tertiary);
    color: var(--text-secondary);
}

.badge-success {
    background-color: rgba(35, 134, 54, 0.2);
    color: #7ee787;
}

.badge-warning {
    background-color: rgba(210, 153, 34, 0.2);
    color: var(--accent-warning);
}

.badge-danger {
    background-color: rgba(218, 54, 51, 0.2);
    color: #f85149;
}

.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
}

.login-container {
    width: 100%;
    max-width: 400px;
    padding: 20px;
}

.login-card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 30px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

.login-card .logo {
    text-align: center;
    margin-bottom: 5px;
}

.login-icon {
    display: block;
    margin: 0 auto 15px;
    max-width: 80px;
    height: auto;
}

.header .logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.header .logo img {
    height: 40px;
    width: auto;
}

.download-card .logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    margin-bottom: 30px;
}

.download-card .logo img {
    height: 40px;
    width: auto;
}

.tagline {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 25px;
}

.upload-section,
.files-section,
.users-section {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 20px;
}

.upload-section h2,
.files-section h2,
.users-section h2 {
    font-size: 18px;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.upload-form .upload-area {
    border: 2px dashed var(--border-color);
    border-radius: 6px;
    padding: 30px;
    text-align: center;
    margin-bottom: 15px;
}

.upload-form input[type="file"] {
    border: none;
    background: transparent;
    padding: 0;
}

.form-row {
    display: flex;
    gap: 15px;
    align-items: flex-end;
}

.form-row .form-group {
    flex: 1;
    margin-bottom: 0;
}

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

.files-table th,
.files-table td,
.users-table th,
.users-table td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.files-table th,
.users-table th {
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 12px;
    text-transform: uppercase;
}

.files-table tr:hover,
.users-table tr:hover {
    background-color: var(--bg-tertiary);
}

.files-table tr.expired {
    opacity: 0.7;
}

.actions {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.empty-state {
    text-align: center;
    color: var(--text-secondary);
    padding: 40px;
}

.add-user-form {
    background-color: var(--bg-tertiary);
    border-radius: 6px;
    padding: 15px;
    margin-bottom: 20px;
}

.add-user-form h3 {
    font-size: 14px;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.text-muted {
    color: var(--text-secondary);
    font-size: 12px;
}

.token-display {
    display: none;
    align-items: center;
    gap: 5px;
    margin-top: 5px;
}

.token-display code {
    background-color: var(--bg-tertiary);
    padding: 3px 8px;
    border-radius: 4px;
    font-size: 11px;
    color: var(--accent-primary);
}

.download-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
}

.download-container {
    width: 100%;
    max-width: 500px;
    padding: 20px;
}

.download-card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 40px 30px;
    text-align: center;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

.download-card .logo {
    margin-bottom: 30px;
}

.file-info {
    margin: 30px 0;
}

.file-icon {
    font-size: 48px;
    margin-bottom: 15px;
}

.file-info h2 {
    font-size: 18px;
    margin-bottom: 10px;
    word-break: break-all;
}

.file-token {
    color: var(--text-secondary);
}

.file-token code {
    background-color: var(--bg-tertiary);
    padding: 3px 8px;
    border-radius: 4px;
    font-size: 12px;
}

.file-expiry {
    color: var(--text-secondary);
    font-size: 13px;
    margin-top: 5px;
}

.download-note {
    margin-top: 15px;
    color: var(--text-secondary);
    font-size: 12px;
}

.alert-error {
    background-color: rgba(218, 54, 51, 0.2);
    border: 1px solid var(--accent-danger);
    color: #f85149;
    padding: 12px;
    border-radius: 6px;
    margin-bottom: 20px;
}

@media (max-width: 600px) {
    .header-content {
        flex-direction: column;
        gap: 10px;
    }
    
    .form-row {
        flex-direction: column;
    }
    
    .form-row .form-group {
        width: 100%;
    }
    
    .actions {
        flex-direction: column;
    }
    
    .actions .btn {
        width: 100%;
    }
}