:root {
    --bg-color: #e3e2e1;
    --card-bg: #fcfcfc;
    --primary: #2b7bc4;
    --primary-hover: #3daee9;
    --text-main: #232629;
    --text-muted: #5f6265;
    --border-color: #bcbcbc;
    --status-online: #2ecc71;
    --status-offline: #e74c3c;
    --status-sent: #2b7bc4;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    padding-bottom: 3rem;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
}

/* Header styled as a desktop panel */
header {
    background: linear-gradient(to bottom, #f5f5f5 0%, #e1e1e0 100%);
    border: 1px solid #acacac;
    border-radius: 6px;
    padding: 0.75rem 1.25rem;
    margin-bottom: 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: inset 0 1px 0 #ffffff, 0 1px 3px rgba(0,0,0,0.08);
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo h1 {
    font-size: 1.25rem;
    font-weight: 600;
    color: #232629;
    text-shadow: 0 1px 0 #ffffff;
}

.header-actions {
    display: flex;
    gap: 0.5rem;
}

/* Nav styled as classic Oxygen folder tabs */
.main-nav {
    display: flex;
    gap: 0.25rem;
    margin-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0;
    padding-left: 0.5rem;
}

.nav-item {
    background: linear-gradient(to bottom, #eaeaea 0%, #dcdcdc 100%);
    border: 1px solid var(--border-color);
    border-bottom: none;
    color: var(--text-muted);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    padding: 0.5rem 1.25rem;
    border-radius: 5px 5px 0 0;
    position: relative;
    top: 1px;
    transition: all 0.15s ease-in-out;
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.4);
    text-shadow: 0 1px 0 rgba(255,255,255,0.6);
}

.nav-item:hover {
    color: var(--text-main);
    background: linear-gradient(to bottom, #fafafa 0%, #e2e2e2 100%);
}

.nav-item.active {
    color: #2b7bc4;
    background: #fcfcfc;
    border-bottom: 1px solid #fcfcfc;
    box-shadow: inset 0 1px 0 rgba(255,255,255,1);
    top: 2px;
    z-index: 2;
}

.tab-content {
    display: none;
}

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

/* Cards styled as native program groupboxes */
.card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 1.5rem;
    margin-bottom: 2rem;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08), inset 0 1px 0 rgba(255,255,255,0.9);
}

.card h2 {
    font-size: 1.15rem;
    margin-bottom: 1.25rem;
    font-weight: 600;
    color: #232629;
    border-bottom: 1px solid #dcdcdc;
    padding-bottom: 0.5rem;
    text-shadow: 0 1px 0 #ffffff;
}

/* Oxygen Button styling */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.5rem 1.25rem;
    font-weight: 500;
    font-size: 0.9rem;
    border-radius: 5px;
    cursor: pointer;
    border: 1px solid #a8a8a8;
    background: linear-gradient(to bottom, #fcfcfc 0%, #e0e0e0 40%, #d5d5d5 100%);
    color: #232629;
    box-shadow: 0 1px 2px rgba(0,0,0,0.08), inset 0 1px 0 rgba(255,255,255,0.7);
    transition: all 0.15s ease-in-out;
    font-family: inherit;
    text-shadow: 0 1px 0 rgba(255,255,255,0.6);
}

.btn:hover {
    border-color: #3daee9;
    background: linear-gradient(to bottom, #ffffff 0%, #ebf5fb 40%, #d6eaf8 100%);
    box-shadow: 0 1px 4px rgba(61, 174, 233, 0.25), inset 0 1px 0 rgba(255,255,255,0.9);
}

.btn:active {
    background: linear-gradient(to bottom, #d5d5d5 0%, #e5e5e5 100%);
    box-shadow: inset 0 1px 3px rgba(0,0,0,0.15);
    transform: translateY(0.5px);
}

.btn-primary {
    background: linear-gradient(to bottom, #73b9e5 0%, #2e8bdc 40%, #1c6fae 100%);
    border-color: #1a5e95;
    color: #ffffff;
    text-shadow: 0 -1px 0 rgba(0,0,0,0.25);
    box-shadow: 0 1px 2px rgba(0,0,0,0.15), inset 0 1px 0 rgba(255,255,255,0.3);
}

.btn-primary:hover {
    background: linear-gradient(to bottom, #89c7eb 0%, #3daee9 40%, #2184be 100%);
    border-color: #1a5e95;
    color: #ffffff;
    box-shadow: 0 1px 4px rgba(61, 174, 233, 0.35), inset 0 1px 0 rgba(255,255,255,0.4);
}

.btn-primary:active {
    background: linear-gradient(to bottom, #1c6fae 0%, #2e8bdc 100%);
    box-shadow: inset 0 1px 4px rgba(0,0,0,0.3);
}

.btn-secondary {
    background: linear-gradient(to bottom, #fafafa 0%, #e5e7eb 40%, #d1d5db 100%);
    border-color: #9ca3af;
}

.btn-icon {
    padding: 0.45rem;
    border-radius: 5px;
    border: 1px solid transparent;
    background: transparent;
    box-shadow: none;
}
.btn-icon:hover {
    border-color: #b0b0b0;
    background: linear-gradient(to bottom, #ffffff 0%, #eaeaea 100%);
}

.btn-sm {
    padding: 0.35rem 0.75rem;
    font-size: 0.8rem;
}

/* Form inputs with 3D inset shadows */
.form-group {
    margin-bottom: 1.25rem;
}

.form-row {
    display: flex;
    gap: 1rem;
}

.form-row .form-group {
    flex: 1;
}

label {
    display: block;
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 0.375rem;
    font-weight: 600;
}

input, select {
    width: 100%;
    background-color: #ffffff;
    border: 1px solid #b8b8b8;
    color: #232629;
    padding: 0.55rem 0.75rem;
    border-radius: 4px;
    font-family: inherit;
    font-size: 0.95rem;
    box-shadow: inset 1px 1px 3px rgba(0, 0, 0, 0.12);
    transition: border-color 0.15s, box-shadow 0.15s;
}

input:focus, select:focus {
    outline: none;
    border-color: #3daee9;
    box-shadow: 0 0 5px rgba(61, 174, 233, 0.6), inset 1px 1px 2px rgba(0, 0, 0, 0.1);
}

.divider {
    height: 1px;
    background-color: #dcdcdc;
    margin: 1.5rem 0;
}

/* Modals styled as native windows */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.4);
    z-index: 2000;
    justify-content: center;
    align-items: center;
    padding: 1rem;
}

.modal.active {
    display: flex;
}

.modal-content {
    background-color: var(--card-bg);
    border: 1px solid #909090;
    border-radius: 6px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.25), inset 0 1px 0 #ffffff;
    overflow: hidden;
    padding: 0;
    width: 100%;
    max-width: 500px;
}

.modal-header {
    background: linear-gradient(to bottom, #eff2f5 0%, #dcdfe3 100%);
    border-bottom: 1px solid #b0b0b0;
    padding: 0.75rem 1.25rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: inset 0 1px 0 #ffffff;
}

.modal-header h2 {
    font-size: 1.05rem;
    font-weight: 600;
    color: #232629;
    margin: 0;
    text-shadow: 0 1px 0 #ffffff;
    border-bottom: none;
    padding-bottom: 0;
}

/* Styled close button as red Oxygen ball window close */
.btn-close {
    width: 18px;
    height: 18px;
    background: radial-gradient(cx 30%, cy 30%, #ff8888 0%, #ef4444 60%, #cc0000 100%);
    border: 1px solid #990000;
    border-radius: 50%;
    color: transparent;
    cursor: pointer;
    position: relative;
    box-shadow: 0 1px 2px rgba(0,0,0,0.15), inset 0 1px 0 rgba(255,255,255,0.4);
}

.btn-close:hover {
    background: radial-gradient(cx 30%, cy 30%, #ffaaaa 0%, #ff4d4d 60%, #e60000 100%);
}

.btn-close::before, .btn-close::after {
    content: '';
    position: absolute;
    width: 8px;
    height: 2px;
    background-color: white;
    top: 7px;
    left: 4px;
}
.btn-close::before { transform: rotate(45deg); }
.btn-close::after { transform: rotate(-45deg); }

.modal-content form {
    padding: 1.5rem;
}

.modal-content .helper-text {
    padding: 1.25rem 1.5rem 0 1.5rem;
    margin-bottom: 0;
}

.modal-content .code-block {
    margin: 1rem 1.5rem;
}

/* User management / lists items */
.instances-list, .otp-secrets-list, .users-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.instance-item, .otp-secret-item, .user-item {
    background: linear-gradient(to bottom, #fbfbfb 0%, #f1f1f1 100%);
    border: 1px solid #cfcfcf;
    border-radius: 5px;
    padding: 0.875rem 1.25rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all 0.2s ease-in-out;
    box-shadow: inset 0 1px 0 #ffffff;
}

.instance-item:hover, .otp-secret-item:hover, .user-item:hover {
    border-color: #3daee9;
    background: linear-gradient(to bottom, #f2f9fe 0%, #e1f0fa 100%);
    box-shadow: 0 1px 4px rgba(61, 174, 233, 0.15), inset 0 1px 0 #ffffff;
}

.instance-info h3, .otp-secret-info h3, .user-info h3 {
    font-size: 0.95rem;
    font-weight: 600;
    color: #232629;
}

.instance-meta {
    font-size: 0.8rem;
    color: var(--text-muted);
    display: flex;
    gap: 1rem;
    margin-top: 0.25rem;
    flex-wrap: wrap;
}

.instance-actions, .otp-secret-actions, .user-actions {
    display: flex;
    gap: 0.375rem;
}

/* Badges */
.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    font-size: 0.7rem;
    font-weight: 700;
    padding: 0.15rem 0.5rem;
    border-radius: 4px;
    background-color: #e2e8f0;
    border: 1px solid #cbd5e1;
    color: #475569;
}

.status-badge::before {
    content: '';
    width: 6px;
    height: 6px;
    border-radius: 50%;
}

.status-badge.status-offline {
    background-color: #fee2e2;
    border-color: #fca5a5;
    color: #991b1b;
}
.status-badge.status-offline::before { background-color: var(--status-offline); }

.status-badge.status-sent {
    background-color: #dbeafe;
    border-color: #93c5fd;
    color: #1e40af;
}
.status-badge.status-sent::before { background-color: var(--status-sent); }

.status-badge.status-unknown::before { background-color: var(--text-muted); }

/* Firewall Help Modal Code Blocks */
.code-block {
    background-color: #fafafa;
    border: 1px solid #bcbcbc;
    border-radius: 4px;
    padding: 0.75rem 1rem;
    margin-bottom: 0.75rem;
    box-shadow: inset 1px 1px 2px rgba(0,0,0,0.05);
}

.code-label {
    font-size: 0.7rem;
    color: var(--text-muted);
    text-transform: uppercase;
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.code-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
}

.code-block code {
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, monospace;
    font-size: 0.8rem;
    color: #2b7bc4;
    word-break: break-all;
}

/* Login Screen */
.login-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--bg-color);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.login-card {
    background-color: var(--card-bg);
    border: 1px solid #909090;
    border-radius: 6px;
    width: 100%;
    max-width: 400px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2), inset 0 1px 0 #ffffff;
    overflow: hidden;
    padding: 0;
}

.login-card .logo {
    background: linear-gradient(to bottom, #eff2f5 0%, #dcdfe3 100%);
    border-bottom: 1px solid #b0b0b0;
    padding: 0.85rem 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    box-shadow: inset 0 1px 0 #ffffff;
}

.login-card .logo h2 {
    font-size: 1.1rem;
    font-weight: 600;
    color: #232629;
    text-shadow: 0 1px 0 #ffffff;
}

.login-card form {
    padding: 1.5rem 1.5rem 0 1.5rem;
}

.login-card .login-firewall-section {
    padding: 0 1.5rem 1.5rem 1.5rem;
}

.login-error {
    color: var(--status-offline);
    font-size: 0.85rem;
    margin-top: 1rem;
    text-align: center;
    font-weight: 600;
}

/* Konsole-styled System Logs Panel */
.logs-toggle-container {
    margin-top: 2rem;
    margin-bottom: 1rem;
    display: flex;
    justify-content: flex-end;
}

/* Styled switch checkbox */
.switch-container {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
}

.switch-container input {
    display: none;
}

.switch-slider {
    position: relative;
    width: 36px;
    height: 20px;
    background-color: #bdc3c7;
    border-radius: 10px;
    transition: background-color 0.2s;
    border: 1px solid #a8a8a8;
}

.switch-slider::before {
    content: "";
    position: absolute;
    left: 2px;
    top: 2px;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background-color: white;
    transition: transform 0.2s;
    box-shadow: 0 1px 2px rgba(0,0,0,0.2);
}

.switch-container input:checked + .switch-slider {
    background-color: #3daee9;
    border-color: #2b7bc4;
}

.switch-container input:checked + .switch-slider::before {
    transform: translateX(16px);
}

.switch-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 600;
}

.logs-card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 0;
    margin-top: 1rem;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    overflow: hidden;
}

.logs-header {
    background: linear-gradient(to bottom, #eff2f5 0%, #dcdfe3 100%);
    border-bottom: 1px solid #b0b0b0;
    padding: 0.5rem 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: inset 0 1px 0 #ffffff;
}

.logs-header h3 {
    font-size: 0.9rem;
    font-weight: 600;
    color: #232629;
    text-shadow: 0 1px 0 #ffffff;
}

.logs-viewer {
    background-color: #151515;
    border: none;
    border-radius: 0;
    padding: 0.75rem 1rem;
    height: 220px;
    overflow-y: auto;
    font-family: 'Source Code Pro', ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    font-size: 0.75rem;
    line-height: 1.5;
    color: #f0f0f0;
}

.logs-viewer::-webkit-scrollbar {
    width: 10px;
}
.logs-viewer::-webkit-scrollbar-track {
    background: #1e1e1e;
}
.logs-viewer::-webkit-scrollbar-thumb {
    background: #4a4a4a;
    border: 2px solid #1e1e1e;
    border-radius: 5px;
}
.logs-viewer::-webkit-scrollbar-thumb:hover {
    background: #606060;
}

.log-entry {
    margin-bottom: 0.25rem;
    word-break: break-all;
    white-space: pre-wrap;
    border-bottom: 1px solid #252525;
    padding-bottom: 0.25rem;
}

.log-entry:last-child {
    border-bottom: none;
}

.log-time {
    color: #7f8c8d;
    margin-right: 0.5rem;
}

.log-level {
    font-weight: 700;
    margin-right: 0.5rem;
}

.log-level-info {
    color: #00a2e8;
}

.log-level-warning {
    color: #ffc90e;
}

.log-level-error {
    color: #ed1c24;
}

.log-message {
    color: #e4e4e4;
}

/* Helpers */
.helper-text {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 0.75rem;
}

.empty-state {
    text-align: center;
    padding: 2.5rem;
    color: var(--text-muted);
    font-style: italic;
    font-size: 0.9rem;
}

.success-msg {
    color: var(--status-online);
    font-weight: 600;
    text-align: center;
    margin-top: 1rem;
    font-size: 0.85rem;
}