:root {
    --primary-color: #FF0000;
    --background-color: #000000;
    --surface-color: #111111;
    --surface-hover: #1a1a1a;
    --border-color: #333333;
    --border-accent: #FF0000;
    --text-primary: #FFFFFF;
    --text-secondary: #CCCCCC;
    --text-muted: #888888;
    --success-color: #00CC00;
    --error-color: #FF0000;
    --warning-color: #FFAA00;
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
}

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

html, body {
    height: 100%;
}

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

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

a:hover {
    text-decoration: underline;
}

button {
    font-family: inherit;
    cursor: pointer;
}

input, textarea, select {
    font-family: inherit;
    font-size: inherit;
}

.app-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.header {
    background-color: var(--surface-color);
    border-bottom: 1px solid var(--border-color);
    padding: 0 20px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 20px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 18px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.logo img {
    height: 32px;
    width: auto;
}

.logo-text {
    color: var(--primary-color);
}

.nav-tabs {
    display: flex;
    gap: 0;
    height: 100%;
}

.nav-tab {
    padding: 0 20px;
    height: 60px;
    display: flex;
    align-items: center;
    color: var(--text-secondary);
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    transition: all 0.2s ease;
}

.nav-tab:hover {
    color: var(--text-primary);
    background-color: var(--surface-hover);
}

.nav-tab.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
}

.header-right {
    display: flex;
    align-items: center;
    gap: 15px;
}

.lang-toggle {
    display: flex;
    gap: 0;
    border: 1px solid var(--border-color);
}

.lang-btn {
    padding: 6px 12px;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 12px;
    text-transform: uppercase;
    transition: all 0.2s ease;
}

.lang-btn:hover {
    background-color: var(--surface-hover);
}

.lang-btn.active {
    background-color: var(--primary-color);
    color: var(--text-primary);
}

.user-menu {
    position: relative;
}

.user-menu-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    background: none;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    font-size: 14px;
}

.user-menu-btn:hover {
    border-color: var(--primary-color);
}

.user-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: 4px;
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    min-width: 180px;
    display: none;
    z-index: 200;
}

.user-dropdown.open {
    display: block;
}

.user-dropdown-item {
    display: block;
    width: 100%;
    padding: 12px 16px;
    background: none;
    border: none;
    color: var(--text-primary);
    text-align: left;
    font-size: 14px;
    cursor: pointer;
}

.user-dropdown-item:hover {
    background-color: var(--surface-hover);
}

.user-dropdown-item.danger {
    color: var(--primary-color);
}

.main-content {
    flex: 1;
    padding: 30px;
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
}

.page-title {
    font-size: 24px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 30px;
    padding-bottom: 15px;
    border-bottom: 1px solid var(--border-color);
}

.page-title span {
    color: var(--primary-color);
}

.card {
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    margin-bottom: 20px;
}

.card-header {
    padding: 15px 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.card-title {
    font-size: 16px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.card-body {
    padding: 20px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    font-size: 14px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border: 1px solid transparent;
    transition: all 0.2s ease;
}

.btn-primary {
    background-color: var(--primary-color);
    color: var(--text-primary);
    border-color: var(--primary-color);
}

.btn-primary:hover {
    background-color: #cc0000;
    border-color: #cc0000;
}

.btn-secondary {
    background-color: transparent;
    color: var(--text-primary);
    border-color: var(--border-color);
}

.btn-secondary:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.btn-danger {
    background-color: transparent;
    color: var(--primary-color);
    border-color: var(--primary-color);
}

.btn-danger:hover {
    background-color: var(--primary-color);
    color: var(--text-primary);
}

.btn-sm {
    padding: 6px 12px;
    font-size: 12px;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    margin-bottom: 8px;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-secondary);
}

.form-label.required::after {
    content: ' *';
    color: var(--primary-color);
}

.form-control {
    width: 100%;
    padding: 12px 15px;
    background-color: var(--background-color);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    font-size: 14px;
    transition: border-color 0.2s ease;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
}

.form-control::placeholder {
    color: var(--text-muted);
}

textarea.form-control {
    min-height: 100px;
    resize: vertical;
}

select.form-control {
    cursor: pointer;
}

.form-help {
    margin-top: 6px;
    font-size: 12px;
    color: var(--text-muted);
}

.form-error {
    margin-top: 6px;
    font-size: 12px;
    color: var(--error-color);
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.checkbox-group {
    display: flex;
    align-items: center;
    gap: 10px;
}

.checkbox-group input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--primary-color);
}

.table-container {
    overflow-x: auto;
}

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

.table th,
.table td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.table th {
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-secondary);
    font-weight: 600;
}

.table tr:hover td {
    background-color: var(--surface-hover);
}

.table .actions {
    display: flex;
    gap: 8px;
}

.badge {
    display: inline-block;
    padding: 4px 10px;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 600;
}

.badge-success {
    background-color: rgba(0, 204, 0, 0.2);
    color: var(--success-color);
    border: 1px solid var(--success-color);
}

.badge-danger {
    background-color: rgba(255, 0, 0, 0.2);
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
}

.badge-warning {
    background-color: rgba(255, 170, 0, 0.2);
    color: var(--warning-color);
    border: 1px solid var(--warning-color);
}

.badge-info {
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

.upload-zone {
    border: 2px dashed var(--border-color);
    padding: 40px;
    text-align: center;
    transition: all 0.2s ease;
    cursor: pointer;
}

.upload-zone:hover,
.upload-zone.dragover {
    border-color: var(--primary-color);
    background-color: rgba(255, 0, 0, 0.05);
}

.upload-zone-icon {
    font-size: 48px;
    margin-bottom: 15px;
    color: var(--text-muted);
}

.upload-zone-text {
    color: var(--text-secondary);
    margin-bottom: 10px;
}

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

.file-list {
    margin-top: 20px;
}

.file-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 15px;
    background-color: var(--background-color);
    border: 1px solid var(--border-color);
    margin-bottom: 8px;
}

.file-item-info {
    display: flex;
    align-items: center;
    gap: 12px;
    flex: 1;
    min-width: 0;
}

.file-item-icon {
    font-size: 24px;
    color: var(--text-muted);
}

.file-item-details {
    flex: 1;
    min-width: 0;
}

.file-item-name {
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

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

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

.progress-bar {
    height: 4px;
    background-color: var(--border-color);
    margin-top: 8px;
    overflow: hidden;
}

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

.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.8);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal-overlay.open {
    display: flex;
}

.modal {
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    width: 100%;
    max-width: 600px;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-lg {
    max-width: 900px;
}

.modal-header {
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-title {
    font-size: 18px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 24px;
    cursor: pointer;
    padding: 0;
    line-height: 1;
}

.modal-close:hover {
    color: var(--primary-color);
}

.modal-body {
    padding: 20px;
}

.modal-footer {
    padding: 20px;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: 10px;
}

.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.login-box {
    width: 100%;
    max-width: 400px;
}

.login-header {
    text-align: center;
    margin-bottom: 40px;
}

.login-logo {
    font-size: 32px;
    font-weight: 700;
    color: var(--primary-color);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 10px;
}

.login-subtitle {
    color: var(--text-secondary);
}

.login-card {
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    padding: 30px;
}

.login-divider {
    display: flex;
    align-items: center;
    margin: 25px 0;
    color: var(--text-muted);
    font-size: 12px;
    text-transform: uppercase;
}

.login-divider::before,
.login-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background-color: var(--border-color);
}

.login-divider span {
    padding: 0 15px;
}

.btn-entra {
    width: 100%;
    background-color: #2f2f2f;
    border-color: #2f2f2f;
    color: var(--text-primary);
}

.btn-entra:hover {
    background-color: #3f3f3f;
    border-color: #3f3f3f;
}

.alert {
    padding: 15px 20px;
    margin-bottom: 20px;
    border: 1px solid;
}

.alert-error {
    background-color: rgba(255, 0, 0, 0.1);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.alert-success {
    background-color: rgba(0, 204, 0, 0.1);
    border-color: var(--success-color);
    color: var(--success-color);
}

.alert-warning {
    background-color: rgba(255, 170, 0, 0.1);
    border-color: var(--warning-color);
    color: var(--warning-color);
}

.section-card {
    margin-bottom: 30px;
}

.section-header {
    background-color: var(--primary-color);
    padding: 15px 20px;
}

.section-title {
    font-size: 16px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.section-body {
    padding: 20px;
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    border-top: none;
}

.section-description {
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.info-item {
    padding: 15px;
    background-color: var(--background-color);
    border: 1px solid var(--border-color);
}

.info-label {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
    margin-bottom: 5px;
}

.info-value {
    font-size: 14px;
    color: var(--text-primary);
}

.comments-section {
    margin-top: 30px;
}

.comment-item {
    padding: 15px;
    background-color: var(--background-color);
    border: 1px solid var(--border-color);
    margin-bottom: 10px;
}

.comment-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 10px;
}

.comment-author {
    font-weight: 600;
    color: var(--primary-color);
}

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

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

.comment-form {
    margin-top: 20px;
}

.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-muted);
}

.empty-state-icon {
    font-size: 64px;
    margin-bottom: 20px;
}

.empty-state-title {
    font-size: 18px;
    margin-bottom: 10px;
    color: var(--text-secondary);
}

.pagination {
    display: flex;
    justify-content: center;
    gap: 5px;
    margin-top: 20px;
}

.pagination-btn {
    padding: 8px 14px;
    background: none;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    cursor: pointer;
}

.pagination-btn:hover:not(:disabled) {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.pagination-btn.active {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: var(--text-primary);
}

.pagination-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.tabs {
    display: flex;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 20px;
}

.tab-btn {
    padding: 12px 20px;
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    color: var(--text-secondary);
    font-size: 14px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.tab-btn:hover {
    color: var(--text-primary);
}

.tab-btn.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

.loading-spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.8);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 2000;
}

.loading-overlay.active {
    display: flex;
}

.loading-content {
    text-align: center;
}

.loading-spinner-lg {
    width: 50px;
    height: 50px;
    border-width: 3px;
    margin-bottom: 20px;
}

.toast-container {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 3000;
}

.toast {
    padding: 15px 20px;
    margin-top: 10px;
    border: 1px solid;
    min-width: 250px;
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.toast-success {
    background-color: var(--surface-color);
    border-color: var(--success-color);
    color: var(--success-color);
}

.toast-error {
    background-color: var(--surface-color);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.hidden {
    display: none !important;
}

@media (max-width: 768px) {
    .header {
        flex-wrap: wrap;
        height: auto;
        padding: 10px;
    }

    .nav-tabs {
        order: 3;
        width: 100%;
        overflow-x: auto;
        margin-top: 10px;
    }

    .nav-tab {
        height: 40px;
        padding: 0 15px;
        font-size: 12px;
    }

    .main-content {
        padding: 15px;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .modal {
        margin: 10px;
        max-height: calc(100vh - 20px);
    }
}