/* --- CSS variables for light & dark mode --- */
:root {
    /* Transitions */
    --theme-transition: background-color 0.4s ease, color 0.4s ease, border-color 0.4s ease, box-shadow 0.4s ease, backdrop-filter 0.4s ease;

    /* Theme colors - Dark Theme (Default) */
    --bg-main: #0b0f19;
    --bg-hero: radial-gradient(circle at top, #1e1b4b 0%, #0b0f19 70%, #030712 100%);
    --card-bg: rgba(22, 30, 49, 0.65);
    --card-border: rgba(255, 255, 255, 0.08);
    --card-hover-border: rgba(255, 255, 255, 0.16);
    --card-glow: rgba(59, 130, 246, 0.12);
    
    --text-main: #f3f4f6;
    --text-muted: #9ca3af;
    --text-light: #6b7280;
    
    /* Accents */
    --accent-blue: #3b82f6;
    --accent-cyan: #06b6d4;
    --accent-violet: #8b5cf6;
    --accent-emerald: #10b981;
    --accent-rose: #f43f5e;
    
    /* Soft backgrounds */
    --bg-blue-soft: rgba(59, 130, 246, 0.1);
    --bg-cyan-soft: rgba(6, 182, 212, 0.1);
    --bg-violet-soft: rgba(139, 92, 246, 0.1);
    --bg-emerald-soft: rgba(16, 185, 129, 0.1);
    --bg-rose-soft: rgba(244, 63, 94, 0.1);
    
    /* Particle canvas defaults */
    --canvas-opacity: 0.7;
    --dot-color: 6, 182, 212; /* RGB components */
    --line-color: 59, 130, 246; /* RGB components */
    
    /* Input/Interface details */
    --toggle-bg: rgba(255, 255, 255, 0.05);
    --toggle-border: rgba(255, 255, 255, 0.1);
    --btn-secondary-bg: rgba(255, 255, 255, 0.04);
}

[data-theme="light"] {
    /* Theme colors - Light Theme */
    --bg-main: #f8fafc;
    --bg-hero: radial-gradient(circle at top, #eff6ff 0%, #f1f5f9 60%, #e2e8f0 100%);
    --card-bg: rgba(255, 255, 255, 0.75);
    --card-border: rgba(0, 0, 0, 0.06);
    --card-hover-border: rgba(37, 99, 235, 0.15);
    --card-glow: rgba(37, 99, 235, 0.06);
    
    --text-main: #0f172a;
    --text-muted: #475569;
    --text-light: #94a3b8;
    
    /* Accents (slightly deeper for readability in light mode) */
    --accent-blue: #2563eb;
    --accent-cyan: #0891b2;
    --accent-violet: #7c3aed;
    --accent-emerald: #059669;
    --accent-rose: #e11d48;
    
    /* Soft backgrounds */
    --bg-blue-soft: rgba(37, 99, 235, 0.08);
    --bg-cyan-soft: rgba(8, 145, 178, 0.08);
    --bg-violet-soft: rgba(124, 58, 237, 0.08);
    --bg-emerald-soft: rgba(5, 150, 105, 0.08);
    --bg-rose-soft: rgba(225, 29, 72, 0.08);
    
    /* Particle canvas values */
    --canvas-opacity: 0.6;
    --dot-color: 37, 99, 235;
    --line-color: 8, 145, 178;
    
    /* Details */
    --toggle-bg: rgba(0, 0, 0, 0.03);
    --toggle-border: rgba(0, 0, 0, 0.08);
    --btn-secondary-bg: rgba(0, 0, 0, 0.03);
}

/* --- Core Reset --- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-main);
    color: var(--text-main);
    transition: var(--theme-transition);
    overflow-x: hidden;
    line-height: 1.6;
}

h1, h2, h3, h4, .logo-text {
    font-family: 'Outfit', sans-serif;
    font-weight: 700;
}

code, .value-num, .process-table, #sys-time, #sys-uptime, #sys-hostname, .badge-tag {
    font-family: 'Fira Code', monospace;
}

/* --- Hero Section Container --- */
.hero-container {
    position: relative;
    width: 100%;
    min-height: 90vh;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    background: var(--bg-hero);
    transition: var(--theme-transition);
    padding: 1.5rem 2rem;
    overflow: hidden;
}

/* Particle Canvas background style */
#particle-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    pointer-events: none;
    opacity: var(--canvas-opacity);
    transition: opacity 0.4s ease;
}

/* --- Header / Navbar inside Hero --- */
.navbar {
    position: relative;
    z-index: 10;
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    max-width: 1300px;
    margin: 0 auto;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    background: rgba(var(--bg-main), 0.2);
    border: 1px solid var(--card-border);
    padding: 1rem 1.5rem;
    border-radius: 16px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

.logo-icon-svg {
    color: var(--accent-blue);
    width: 24px;
    height: 24px;
}

.logo-text {
    font-size: 1.35rem;
    letter-spacing: -0.03em;
    color: var(--text-main);
}

.logo-text span {
    color: var(--accent-blue);
    font-weight: 800;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 1.25rem;
}

/* Live connection indicator */
.status-badge {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(16, 185, 129, 0.08);
    border: 1px solid rgba(16, 185, 129, 0.2);
    color: var(--accent-emerald);
    padding: 0.45rem 0.9rem;
    border-radius: 9999px;
    font-size: 0.8rem;
    font-weight: 600;
    transition: var(--theme-transition);
}

.status-dot {
    width: 7px;
    height: 7px;
    background-color: var(--accent-emerald);
    border-radius: 50%;
    display: inline-block;
    animation: pulse 1.8s infinite;
}

@keyframes pulse {
    0% { transform: scale(0.95); opacity: 0.5; }
    50% { transform: scale(1.25); opacity: 1; box-shadow: 0 0 8px var(--accent-emerald); }
    100% { transform: scale(0.95); opacity: 0.5; }
}

/* Theme toggle switch design */
.theme-toggle-btn {
    background: var(--toggle-bg);
    border: 1px solid var(--toggle-border);
    width: 44px;
    height: 44px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-main);
    cursor: pointer;
    transition: all 0.3s ease;
}

.theme-toggle-btn:hover {
    transform: scale(1.05);
    background: var(--card-border);
}

.theme-icon {
    width: 18px;
    height: 18px;
    position: absolute;
    transition: transform 0.5s ease, opacity 0.3s ease;
}

/* Sun/Moon toggle visibility dynamics */
[data-theme="dark"] .sun-icon {
    opacity: 0;
    transform: rotate(90deg) scale(0.6);
}

[data-theme="dark"] .moon-icon {
    opacity: 1;
    transform: rotate(0) scale(1);
}

[data-theme="light"] .sun-icon {
    opacity: 1;
    transform: rotate(0) scale(1);
}

[data-theme="light"] .moon-icon {
    opacity: 0;
    transform: rotate(-90deg) scale(0.6);
}

/* --- Hero Content Overlay --- */
.hero-content {
    position: relative;
    z-index: 10;
    text-align: center;
    max-width: 800px;
    margin: auto;
    padding: 3rem 1rem;
}

.badge-vibe {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--bg-blue-soft);
    border: 1px solid rgba(59, 130, 246, 0.2);
    color: var(--accent-blue);
    padding: 0.5rem 1.1rem;
    border-radius: 9999px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 1.75rem;
    box-shadow: 0 4px 15px rgba(59, 130, 246, 0.05);
}

.icon-sparkle {
    width: 15px;
    height: 15px;
    animation: sparkle-spin 4s linear infinite;
}

@keyframes sparkle-spin {
    0% { transform: rotate(0); }
    100% { transform: rotate(360deg); }
}

.hero-title {
    font-size: 3.5rem;
    line-height: 1.2;
    letter-spacing: -0.04em;
    margin-bottom: 1.5rem;
    color: var(--text-main);
}

.gradient-text {
    background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-cyan) 60%, var(--accent-violet) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: 1.2rem;
    color: var(--text-muted);
    max-width: 620px;
    margin: 0 auto 2.5rem auto;
    font-weight: 400;
}

/* Buttons and Call to Actions */
.hero-ctas {
    display: flex;
    justify-content: center;
    gap: 1rem;
}

.btn-primary, .btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.85rem 1.75rem;
    border-radius: 14px;
    font-weight: 600;
    font-size: 0.95rem;
    text-decoration: none;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-cyan) 100%);
    color: #ffffff;
    box-shadow: 0 10px 25px rgba(6, 182, 212, 0.25);
    border: none;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 15px 30px rgba(6, 182, 212, 0.35);
}

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

.btn-secondary:hover {
    transform: translateY(-2px);
    background: var(--card-border);
    border-color: var(--card-hover-border);
}

.btn-primary svg, .btn-secondary svg {
    width: 18px;
    height: 18px;
}

/* Scroll indicator styling */
.scroll-indicator {
    position: relative;
    z-index: 10;
    display: flex;
    justify-content: center;
    margin-top: 1rem;
}

.scroll-dot {
    width: 24px;
    height: 40px;
    border-radius: 15px;
    border: 2px solid var(--text-light);
    position: relative;
}

.scroll-dot::after {
    content: '';
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background-color: var(--accent-blue);
    animation: scroll-slide 1.6s infinite ease-in-out;
}

@keyframes scroll-slide {
    0% { top: 8px; opacity: 0; }
    50% { opacity: 1; }
    100% { top: 24px; opacity: 0; }
}

/* Responsive hero text adjustment */
@media (max-width: 768px) {
    .hero-container {
        padding: 1.5rem 1rem;
    }
    .hero-title {
        font-size: 2.35rem;
    }
    .hero-subtitle {
        font-size: 1rem;
    }
    .hero-ctas {
        flex-direction: column;
        width: 100%;
        max-width: 320px;
        margin: 0 auto;
    }
    .btn-primary, .btn-secondary {
        justify-content: center;
    }
}

/* --- Main Layout Sections --- */
.main-content {
    max-width: 1300px;
    margin: 0 auto;
    padding: 4rem 1.5rem;
}

.section-container {
    margin-bottom: 5.5rem;
}

.section-header {
    margin-bottom: 2.75rem;
}

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

.justify-center {
    justify-content: center;
}

.section-title-wrap {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.5rem;
}

.section-icon {
    width: 28px;
    height: 28px;
}

.section-container h2 {
    font-size: 2rem;
    letter-spacing: -0.03em;
    color: var(--text-main);
}

.section-desc {
    color: var(--text-muted);
    font-size: 1rem;
    max-width: 600px;
}

.text-center .section-desc {
    margin: 0 auto;
}

/* Color classes for quick setup */
.text-cyan { color: var(--accent-cyan); }
.text-violet { color: var(--accent-violet); }
.text-emerald { color: var(--accent-emerald); }
.text-rose { color: var(--accent-rose); }
.text-blue { color: var(--accent-blue); }

/* --- 4 Metrics Cards Grid --- */
.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2.5rem;
}

.metric-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 20px;
    padding: 1.5rem;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    transition: var(--theme-transition), transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    position: relative;
    overflow: hidden;
}

.metric-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px var(--card-glow);
    border-color: var(--card-hover-border);
}

.metric-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: transparent;
}

.card-cpu::before { background: linear-gradient(to right, var(--accent-blue), var(--accent-cyan)); }
.card-mem::before { background: linear-gradient(to right, var(--accent-violet), #c084fc); }
.card-disk::before { background: linear-gradient(to right, var(--accent-emerald), #34d399); }
.card-net::before { background: linear-gradient(to right, var(--accent-rose), #f472b6); }

.card-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.25rem;
}

.card-title-text {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.card-title-text svg {
    width: 18px;
    height: 18px;
}

.card-badge {
    font-size: 0.75rem;
    background: var(--toggle-bg);
    padding: 0.25rem 0.6rem;
    border-radius: 6px;
    color: var(--text-muted);
    font-weight: 500;
}

.card-body-val {
    font-size: 2.85rem;
    font-weight: 800;
    letter-spacing: -0.04em;
    margin-bottom: 0.85rem;
    display: flex;
    align-items: baseline;
    gap: 0.2rem;
    color: var(--text-main);
}

.value-unit {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-light);
}

.progress-track {
    width: 100%;
    height: 6px;
    background: var(--toggle-bg);
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: 0.85rem;
}

.progress-fill {
    height: 100%;
    width: 0%;
    border-radius: 3px;
    transition: width 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.bg-cyan { background: linear-gradient(to right, var(--accent-blue), var(--accent-cyan)); }
.bg-violet { background: linear-gradient(to right, var(--accent-violet), #c084fc); }
.bg-emerald { background: linear-gradient(to right, var(--accent-emerald), #34d399); }

.card-detail-info {
    font-size: 0.825rem;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}

/* Disk and Network specific meta-grids */
.disk-meta-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.5rem;
    border-top: 1px solid var(--card-border);
    padding-top: 0.85rem;
    margin-top: 0.85rem;
}

.disk-meta-item {
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
}

.disk-meta-item span {
    font-size: 0.725rem;
    color: var(--text-light);
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.disk-meta-item strong {
    font-size: 0.825rem;
    font-weight: 600;
    color: var(--text-main);
}

/* Dynamic Sparkline Containers */
.chart-container {
    width: 100%;
    height: 55px;
    margin-top: 1rem;
}

.chart-container canvas {
    width: 100% !important;
    height: 100% !important;
}

/* Latency card styles */
.latency-indicator-track {
    width: 100%;
    height: 6px;
    background: var(--toggle-bg);
    border-radius: 3px;
    position: relative;
    margin-bottom: 1rem;
}

.latency-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: var(--accent-rose);
    position: absolute;
    top: 50%;
    left: 0%;
    transform: translate(-50%, -50%);
    box-shadow: 0 0 10px var(--accent-rose);
    transition: left 0.4s cubic-bezier(0.16, 1, 0.3, 1), background-color 0.4s ease;
}

/* --- Detailed System & Process Row --- */
.details-row {
    display: grid;
    grid-template-columns: 1fr 1.35fr;
    gap: 1.5rem;
}

@media (max-width: 992px) {
    .details-row {
        grid-template-columns: 1fr;
    }
}

.details-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 20px;
    padding: 1.75rem;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    transition: var(--theme-transition);
}

.info-list-grid {
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
    margin-top: 1.25rem;
}

.info-list-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--card-border);
    padding-bottom: 0.85rem;
}

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

.info-item-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.info-item-label svg {
    width: 16px;
    height: 16px;
    color: var(--text-light);
}

.info-item-value {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-main);
    word-break: break-all;
    text-align: right;
}

/* Process table styles */
.table-scroll-wrapper {
    width: 100%;
    overflow-x: auto;
    margin-top: 1rem;
}

.process-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    font-size: 0.85rem;
}

.process-table th {
    padding: 0.85rem 1rem;
    color: var(--text-light);
    font-weight: 600;
    border-bottom: 1px solid var(--card-border);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.process-table td {
    padding: 0.85rem 1rem;
    border-bottom: 1px solid rgba(var(--card-border), 0.03);
    color: var(--text-main);
}

.process-table tr:last-child td {
    border-bottom: none;
}

.process-table tr:hover td {
    background: rgba(255, 255, 255, 0.02);
}

[data-theme="light"] .process-table tr:hover td {
    background: rgba(0, 0, 0, 0.01);
}

.badge-pid {
    background: var(--toggle-bg);
    border: 1px solid var(--toggle-border);
    padding: 0.15rem 0.45rem;
    border-radius: 5px;
    font-size: 0.75rem;
    color: var(--text-muted);
}

.table-loading-text {
    text-align: center;
    color: var(--text-muted);
    padding: 3rem 1rem !important;
}

.animate-spin {
    animation: spin 1s linear infinite;
    display: inline-block;
    vertical-align: middle;
    margin-right: 0.5rem;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* --- Extensions Grid --- */
.extensions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.ext-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 20px;
    padding: 1.5rem;
    display: flex;
    align-items: flex-start;
    gap: 1.25rem;
    text-decoration: none;
    color: inherit;
    transition: var(--theme-transition), transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    position: relative;
}

.ext-card:not(.ext-disabled):hover {
    transform: translateY(-5px);
    border-color: var(--card-hover-border);
    box-shadow: 0 15px 30px var(--card-glow);
}

.ext-icon-box {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.ext-icon-box svg {
    width: 24px;
    height: 24px;
}

.ext-card-content {
    flex-grow: 1;
}

.ext-card-content h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.35rem;
    color: var(--text-main);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.badge-tag {
    font-size: 0.65rem;
    background: var(--bg-rose-soft);
    color: var(--accent-rose);
    border: 1px solid rgba(244, 63, 94, 0.15);
    padding: 0.15rem 0.45rem;
    border-radius: 9999px;
    font-weight: 600;
}

.ext-card-content p {
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.5;
}

.ext-arrow {
    align-self: flex-start;
    color: var(--text-light);
    opacity: 0.4;
    transition: all 0.3s ease;
}

.ext-card:hover .ext-arrow {
    transform: translate(2px, -2px);
    opacity: 1;
    color: var(--accent-blue);
}

.ext-arrow svg {
    width: 16px;
    height: 16px;
}

.ext-disabled {
    cursor: not-allowed;
    opacity: 0.6;
}

/* --- Footer --- */
.footer-container {
    border-top: 1px solid var(--card-border);
    padding: 2rem 1.5rem;
    margin-top: 4rem;
    background: rgba(var(--bg-main), 0.2);
    backdrop-filter: blur(5px);
}

.footer-content {
    max-width: 1300px;
    margin: 0 auto;
    text-align: center;
    color: var(--text-light);
    font-size: 0.85rem;
}