:root {
    /* Color Palette - Premium Slate Dark Mode */
    --bg-dark: #090d16;
    --bg-surface: #111827;
    --bg-card: #1f2937;
    --border-color: #374151;
    --border-hover: #4b5563;
    --hover-color: #1f2937;
    --input-bg: #1f2937;
    --btn-secondary-bg: #374151;
    
    --primary: #3b82f6;
    --primary-hover: #2563eb;
    
    --text-main: #f9fafb;
    --text-muted: #9ca3af;
    
    /* System Accents */
    --cyan: #06b6d4;
    --violet: #6366f1;
    --emerald: #10b981;
    --amber: #f59e0b;
    --rose: #ef4444;
    
    /* Layout */
    --sidebar-width: 260px;
    --transition-speed: 0.2s;
}

body.light-theme {
    --bg-dark: #f3f4f6;
    --bg-surface: #ffffff;
    --bg-card: #f9fafb;
    --border-color: #e5e7eb;
    --border-hover: #d1d5db;
    --hover-color: #f3f4f6;
    --input-bg: #f9fafb;
    --btn-secondary-bg: #e5e7eb;
    
    --primary: #3b82f6;
    --primary-hover: #2563eb;
    
    --text-main: #111827;
    --text-muted: #4b5563;
    
    --cyan: #0284c7;
    --violet: #4f46e5;
    --emerald: #059669;
    --amber: #d97706;
    --rose: #dc2626;
}

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

body {
    font-family: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-main);
    min-height: 100vh;
    overflow-x: hidden;
}

/* Glassmorphism replaced with flat premium surfaces */
.glass {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    transition: border-color var(--transition-speed), box-shadow var(--transition-speed);
}

.glass:hover {
    border-color: var(--border-hover);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.3), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

.hide {
    display: none !important;
}

/* Helper Text */
.success-text { color: var(--emerald); }
.error-text { color: var(--rose); }
.warning-text { color: var(--amber); }

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 8px 16px;
    border-radius: 6px;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: background-color var(--transition-speed), border-color var(--transition-speed);
    border: 1px solid transparent;
    outline: none;
    font-family: inherit;
    user-select: none;
}

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

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

.btn-secondary {
    background-color: var(--btn-secondary-bg);
    color: var(--text-main);
    border-color: var(--border-color);
}

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

.btn-icon {
    width: 36px;
    height: 36px;
    padding: 0;
    border-radius: 6px;
    background-color: var(--btn-secondary-bg);
    color: var(--text-main);
    border-color: var(--border-color);
}

.btn-icon:hover {
    background-color: var(--hover-color);
    color: var(--text-main);
}

.btn-danger {
    background-color: rgba(239, 68, 68, 0.1);
    color: #f87171;
    border-color: rgba(239, 68, 68, 0.2);
}

.btn-danger:hover {
    background-color: rgba(239, 68, 68, 0.2);
}

.btn-success {
    background-color: rgba(16, 185, 129, 0.1);
    color: #34d399;
    border-color: rgba(16, 185, 129, 0.2);
}

.btn-success:hover {
    background-color: rgba(16, 185, 129, 0.2);
}

.btn-small {
    padding: 4px 10px;
    font-size: 0.75rem;
}

/* Forms & Inputs */
.input-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-bottom: 16px;
    width: 100%;
}

.input-row {
    display: flex;
    gap: 16px;
}

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

label {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
}

input, select {
    background-color: var(--input-bg);
    border: 1px solid var(--border-color);
    padding: 10px 14px;
    border-radius: 6px;
    color: var(--text-main);
    font-size: 0.875rem;
    outline: none;
    transition: border-color var(--transition-speed);
}

input:focus, select:focus {
    border-color: var(--primary);
    background-color: var(--input-bg);
}

.input-help {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 4px;
}

/* ================= 1. LOGIN VIEW ================= */
#login-view {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 20px;
}

.login-card {
    width: 100%;
    max-width: 400px;
    padding: 32px;
}

.login-header {
    text-align: center;
    margin-bottom: 24px;
}

.logo-icon {
    width: 52px;
    height: 52px;
    background-color: var(--primary);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
}

.logo-icon i {
    width: 28px;
    height: 28px;
    color: #fff;
}

.login-header h1 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 6px;
    letter-spacing: -0.025em;
}

.login-header p {
    color: var(--text-muted);
    font-size: 0.875rem;
}

#btn-login-submit {
    width: 100%;
    margin-top: 10px;
    padding: 12px;
}

.error-msg {
    background-color: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.2);
    color: #f87171;
    padding: 10px;
    border-radius: 6px;
    font-size: 0.8125rem;
    margin-bottom: 16px;
    text-align: center;
}

/* ================= 2. MAIN APPLICATION VIEW ================= */
#main-view {
    display: flex;
    min-height: 100vh;
}

#app[data-current-view="login"] #login-view { display: flex; }
#app[data-current-view="login"] #main-view { display: none; }
#app[data-current-view="dashboard"] #login-view { display: none; }
#app[data-current-view="dashboard"] #main-view { display: flex; }

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    border-radius: 0;
    border-top: none;
    border-bottom: none;
    border-left: none;
    background-color: var(--bg-surface);
    display: flex;
    flex-direction: column;
    padding: 24px 16px;
    z-index: 10;
}

.sidebar-header {
    margin-bottom: 32px;
}

.sidebar-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-main);
}

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

.status-indicator {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.75rem;
    color: var(--text-muted);
}

.pulse-dot {
    width: 6px;
    height: 6px;
    background-color: var(--emerald);
    border-radius: 50%;
}

.nav-menu {
    display: flex;
    flex-direction: column;
    gap: 4px;
    flex-grow: 1;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 14px;
    background: transparent;
    border: none;
    border-radius: 6px;
    color: var(--text-muted);
    font-size: 0.875rem;
    font-weight: 500;
    text-align: left;
    cursor: pointer;
    font-family: inherit;
    transition: background-color var(--transition-speed), color var(--transition-speed);
}

.nav-item:hover {
    background-color: var(--hover-color);
    color: var(--text-main);
}

.nav-item.active {
    background-color: var(--primary);
    color: #fff;
}

.sidebar-footer #btn-logout {
    width: 100%;
    padding: 10px;
}

/* Content Area */
.content-area {
    flex-grow: 1;
    padding: 32px;
    overflow-y: auto;
    max-height: 100vh;
}

.tab-content {
    display: none;
}

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

.tab-header {
    margin-bottom: 24px;
}

.tab-header h1 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 4px;
    letter-spacing: -0.025em;
}

.tab-header p {
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* ================= 3. DASHBOARD METRICS ================= */
.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin-bottom: 24px;
}

.card {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 20px;
    display: flex;
    flex-direction: column;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.card-header h3 {
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
}

.metric-icon {
    width: 20px;
    height: 20px;
}

/* Colors Utilities */
.color-cyan { color: var(--cyan); }
.color-violet { color: var(--violet); }
.color-emerald { color: var(--emerald); }
.color-amber { color: var(--amber); }

.color-cyan-stroke { stroke: var(--cyan); }
.color-violet-stroke { stroke: var(--violet); }
.color-emerald-stroke { stroke: var(--emerald); }

/* SVG Gauges */
.gauge-container {
    position: relative;
    width: 120px;
    height: 120px;
    margin: 0 auto 16px;
}

.gauge {
    width: 100%;
    height: 100%;
    transform: rotate(-90deg);
}

.gauge-bg {
    fill: none;
    stroke: var(--border-color);
    stroke-width: 8;
}

.gauge-fill {
    fill: none;
    stroke-width: 8;
    stroke-linecap: round;
    transition: stroke-dashoffset 0.5s ease-out;
}

.gauge-val {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 1.375rem;
    font-weight: 700;
}

.metric-footer {
    display: flex;
    justify-content: space-between;
    border-top: 1px solid var(--border-color);
    padding-top: 12px;
    margin-top: auto;
}

.sub-metric {
    display: flex;
    flex-direction: column;
}

.sub-metric .label {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-bottom: 2px;
}

.sub-metric .value {
    font-size: 0.875rem;
    font-weight: 600;
}

/* System Grid */
.system-card {
    padding: 24px;
}

.system-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 16px;
}

.sys-item {
    display: flex;
    flex-direction: column;
    padding: 12px 16px;
    background: var(--input-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
}

.sys-item .label {
    margin-bottom: 2px;
}

.sys-item .value {
    font-size: 0.9375rem;
    font-weight: 600;
}

/* ================= 4. SERVICES VIEW ================= */
.services-action-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
    margin-bottom: 24px;
}

.service-card {
    position: relative;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.service-meta {
    display: flex;
    align-items: center;
    gap: 12px;
}

.service-icon {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    background: var(--btn-secondary-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
}

.service-icon.active {
    background: rgba(16, 185, 129, 0.1);
    color: var(--emerald);
}

.service-info {
    display: flex;
    flex-direction: column;
}

.service-title {
    font-size: 1rem;
    font-weight: 600;
}

.service-port {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.service-status-pill {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
    align-self: flex-start;
}

.service-status-pill.online {
    background: rgba(16, 185, 129, 0.1);
    color: #34d399;
}

.service-status-pill.offline {
    background: rgba(239, 68, 68, 0.1);
    color: #f87171;
}

.status-dot {
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background-color: currentColor;
}

.service-card-actions {
    display: flex;
    justify-content: space-between;
    margin-top: auto;
    border-top: 1px solid var(--border-color);
    padding-top: 12px;
}

.console-font {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.8125rem;
    line-height: 1.5;
}

/* ================= 5. COMMAND RUNNER VIEW ================= */
.cmd-runner-container {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.cmd-input-wrapper {
    display: flex;
    align-items: center;
    background: var(--input-bg);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 0 14px;
    width: 100%;
}

.cmd-input-wrapper:focus-within {
    border-color: var(--primary);
}

.cmd-input-wrapper input {
    background: transparent;
    border: none;
    padding: 10px 0;
    flex-grow: 1;
    box-shadow: none;
}

.cmd-prompt-prefix {
    color: var(--cyan);
    font-family: 'JetBrains Mono', monospace;
    font-weight: bold;
    font-size: 0.875rem;
    margin-right: 8px;
    user-select: none;
}

.logs-embedded-text {
    background: #090d16;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 16px;
    max-height: 180px;
    overflow-y: auto;
    white-space: pre-wrap;
    color: #d1d5db;
    font-size: 0.8125rem;
    font-family: 'JetBrains Mono', monospace;
    text-align: left;
}

/* ================= 6. MODAL OVERLAY ================= */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(9, 13, 22, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
    padding: 20px;
    backdrop-filter: blur(4px);
}

.modal {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    width: 100%;
    max-width: 480px;
    border-radius: 12px;
    padding: 24px;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.5);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.modal-header h2 {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.025em;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    #main-view {
        flex-direction: column;
    }
    
    .sidebar {
        width: 100%;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
        padding: 16px;
    }
    
    .nav-menu {
        flex-direction: row;
        overflow-x: auto;
    }
    
    .nav-item {
        padding: 8px 12px;
    }
    
    .content-area {
        padding: 20px;
    }
}

/* Advanced Connection Settings styling */
.advanced-settings {
    margin-top: 10px;
    margin-bottom: 16px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 10px;
}

.advanced-settings summary {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-muted);
    cursor: pointer;
    user-select: none;
    outline: none;
}

.advanced-settings summary:hover {
    color: var(--text-main);
}

.advanced-fields {
    margin-top: 10px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

/* Dashboard Specific Layout */
.dashboard-grid-container {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 24px;
}

@media (max-width: 1024px) {
    .dashboard-grid-container {
        grid-template-columns: 1fr;
    }
}

.dashboard-col-left, .dashboard-col-right {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.rpi-image-card {
    padding: 24px;
}

.rpi-image-wrapper {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    overflow: hidden;
}

.rpi-board-img {
    max-width: 100%;
    max-height: 200px;
    object-fit: contain;
    filter: drop-shadow(0 4px 8px rgba(0,0,0,0.4));
    border-radius: 8px;
}

/* Brand logo theme swaps */
.brand-logo.light-logo {
    display: none;
}
.brand-logo.dark-logo {
    display: block;
}

body.light-theme .brand-logo.light-logo {
    display: block;
}
body.light-theme .brand-logo.dark-logo {
    display: none;
}

/* Server Specifications layout */
.server-specs-container {
    display: flex;
    align-items: center;
    gap: 24px;
    width: 100%;
}

.specs-details {
    display: flex;
    flex-direction: column;
    gap: 12px;
    flex-grow: 1;
}

.spec-item {
    display: flex;
    flex-direction: column;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 6px;
}

.spec-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.spec-label {
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    margin-bottom: 2px;
}

.spec-value {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-main);
}

@media (max-width: 600px) {
    .server-specs-container {
        flex-direction: column;
        align-items: center;
        gap: 16px;
    }
    .rpi-image-wrapper {
        max-width: 150px;
    }
}

/* Spinner & File List Table Styles */
@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

#files-list tr {
    border-bottom: 1px solid var(--border-color);
    transition: background-color var(--transition-speed);
}
#files-list tr:hover {
    background-color: var(--hover-color);
}
#files-list td {
    padding: 10px;
    vertical-align: middle;
}
.file-item-name {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-weight: 500;
}
.file-item-name:hover {
    color: var(--primary);
}
.file-item-name i {
    width: 18px;
    height: 18px;
}

/* Drag and drop hover highlight */
.file-browser-card.dragover {
    border: 2px dashed var(--primary) !important;
    background-color: var(--hover-color) !important;
}

/* Progress Bar Styles */
.progress-bar-container {
    width: 100%;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 9999px;
    height: 8px;
    overflow: hidden;
    margin: 16px 0;
    border: 1px solid var(--border-color);
}

.progress-bar-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--cyan), var(--primary));
    border-radius: 9999px;
    transition: width 0.3s ease;
}

/* ================= 7. TASK SCHEDULER STYLES ================= */
textarea {
    background-color: var(--input-bg);
    border: 1px solid var(--border-color);
    padding: 10px 14px;
    border-radius: 6px;
    color: var(--text-main);
    font-size: 0.875rem;
    outline: none;
    transition: border-color var(--transition-speed);
}

textarea:focus {
    border-color: var(--primary);
    background-color: var(--input-bg);
}

.service-status-pill.active {
    background: rgba(16, 185, 129, 0.1);
    color: #34d399;
}

.service-status-pill.paused {
    background: rgba(245, 158, 11, 0.1);
    color: #fbbf24;
}

.service-status-pill.stopped {
    background: rgba(239, 68, 68, 0.1);
    color: #f87171;
}

.service-status-pill.success {
    background: rgba(16, 185, 129, 0.1);
    color: #34d399;
}

.service-status-pill.failed {
    background: rgba(239, 68, 68, 0.1);
    color: #f87171;
}

.service-status-pill.running {
    background: rgba(6, 182, 212, 0.1);
    color: #38bdf8;
}

.task-command-preview {
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 10px 12px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
    color: var(--text-main);
    overflow-x: auto;
    max-height: 80px;
    white-space: pre-wrap;
    word-break: break-all;
}

/* Network Performance Monitoring Custom Styles */
.btn-toggle {
    transition: background-color 0.2s, color 0.2s;
}

.btn-toggle:hover {
    color: var(--text-main) !important;
}

.btn-toggle.active {
    background: var(--primary) !important;
    color: white !important;
}

#net-sockets-list tr:hover, #net-interfaces-list tr:hover {
    background: var(--hover-color);
}

#net-sockets-list td, #net-interfaces-list td {
    padding: 8px;
    border-bottom: 1px solid var(--border-color);
    vertical-align: middle;
}

#net-sockets-list th, #net-interfaces-list th {
    font-weight: 500;
}