/* -------------------------------------------------------------
 * Nginx Live Traffic Dashboard CSS
 * Designed with a premium dark glassmorphism aesthetic.
 * ------------------------------------------------------------- */

/* Color system & tokens */
:root {
    --bg-main: #0b0f19;
    --bg-card: rgba(17, 24, 39, 0.65);
    --bg-card-hover: rgba(17, 24, 39, 0.8);
    --border-glass: rgba(255, 255, 255, 0.07);
    --border-glass-active: rgba(99, 102, 241, 0.3);
    
    --text-primary: #f3f4f6;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;

    --accent-indigo: #6366f1;
    --accent-indigo-glow: rgba(99, 102, 241, 0.15);
    --accent-emerald: #10b981;
    --accent-emerald-glow: rgba(16, 185, 129, 0.15);
    --accent-amber: #fbbf24;
    --accent-amber-glow: rgba(251, 191, 36, 0.15);
    --accent-rose: #ef4444;
    --accent-rose-glow: rgba(239, 68, 68, 0.15);

    --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    
    --shadow-premium: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
    --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reset and Global Styles */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    background-color: var(--bg-main);
    background-image: 
        radial-gradient(at 0% 0%, rgba(99, 102, 241, 0.08) 0px, transparent 50%),
        radial-gradient(at 100% 100%, rgba(16, 185, 129, 0.05) 0px, transparent 50%);
    background-attachment: fixed;
    color: var(--text-primary);
    font-family: var(--font-sans);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

code, pre {
    font-family: var(--font-mono);
}

/* App Container Layout */
.app-container {
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
    gap: 1.5rem;
}

/* Header Styling */
.app-header {
    background: var(--bg-card);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-glass);
    border-radius: 16px;
    padding: 1.25rem 2rem;
    box-shadow: var(--shadow-premium);
}

.header-main {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.logo-area {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.logo-icon {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--accent-indigo), var(--accent-emerald));
    border-radius: 10px;
    position: relative;
    box-shadow: 0 0 15px rgba(99, 102, 241, 0.5);
}

.logo-icon::after {
    content: '';
    position: absolute;
    top: 25%;
    left: 25%;
    width: 50%;
    height: 50%;
    border: 2px solid white;
    border-radius: 4px;
    transform: rotate(45deg);
}

.title-group h1 {
    font-size: 1.35rem;
    font-weight: 800;
    letter-spacing: -0.025em;
    background: linear-gradient(to right, #ffffff, #d1d5db);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.subtitle {
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.status-indicator-group {
    display: flex;
    align-items: center;
    gap: 1rem;
}

/* Status Badge */
.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.35rem 0.85rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    transition: var(--transition-smooth);
    border: 1px solid transparent;
}

.status-badge.connected {
    background: rgba(16, 185, 129, 0.1);
    color: var(--accent-emerald);
    border-color: rgba(16, 185, 129, 0.2);
}

.status-badge.disconnected {
    background: rgba(239, 68, 68, 0.1);
    color: var(--accent-rose);
    border-color: rgba(239, 68, 68, 0.2);
}

.status-badge.loading {
    background: rgba(251, 191, 36, 0.1);
    color: var(--accent-amber);
    border-color: rgba(251, 191, 36, 0.2);
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: currentColor;
}

.status-badge.connected .status-dot {
    animation: pulse 1.8s infinite;
}

.live-clock {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--text-secondary);
    background: rgba(255, 255, 255, 0.03);
    padding: 0.35rem 0.75rem;
    border-radius: 6px;
    border: 1px solid var(--border-glass);
}

/* Grid Layout */
.dashboard-grid {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

/* Cards System */
.card {
    background: var(--bg-card);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-glass);
    border-radius: 16px;
    padding: 1.5rem;
    box-shadow: var(--shadow-premium);
    transition: var(--transition-smooth);
}

.card:hover {
    background: var(--bg-card-hover);
    border-color: rgba(255, 255, 255, 0.12);
}

.card-title {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1.25rem;
    letter-spacing: -0.01em;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* Settings Forms */
.settings-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

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

.input-with-action {
    display: flex;
    gap: 0.5rem;
}

input[type="text"], select {
    width: 100%;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border-glass);
    border-radius: 8px;
    padding: 0.65rem 0.85rem;
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 0.85rem;
    outline: none;
    transition: var(--transition-smooth);
}

input[type="text"]:focus, select:focus {
    border-color: var(--accent-indigo);
    box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.25);
    background: rgba(0, 0, 0, 0.4);
}

/* Action Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    border-radius: 8px;
    padding: 0.65rem 1.25rem;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-smooth);
    border: none;
    width: 100%;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-indigo), rgba(99, 102, 241, 0.8));
    color: #fff;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.9), var(--accent-indigo));
    box-shadow: 0 4px 20px rgba(99, 102, 241, 0.4);
    transform: translateY(-1px);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-primary.paused {
    background: linear-gradient(135deg, var(--accent-amber), rgba(251, 191, 36, 0.8));
    box-shadow: 0 4px 15px rgba(251, 191, 36, 0.3);
}

#btn-fetch-now {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-glass);
    border-radius: 8px;
    padding: 0 0.75rem;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition-smooth);
    display: flex;
    align-items: center;
    justify-content: center;
}

#btn-fetch-now:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
}

#btn-fetch-now:active {
    transform: scale(0.95);
}

/* Help Box System */
.help-box {
    margin-top: 1.25rem;
    border-top: 1px solid var(--border-glass);
    padding-top: 1.25rem;
}

.help-toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 0.75rem;
    font-weight: 600;
    cursor: pointer;
    outline: none;
    text-transform: uppercase;
    letter-spacing: 0.02em;
}

.help-toggle:hover {
    color: var(--text-primary);
}

.chevron-icon {
    transition: transform 0.2s ease;
}

.chevron-icon.rotate {
    transform: rotate(180deg);
}

.help-content {
    margin-top: 0.75rem;
    font-size: 0.75rem;
    color: var(--text-secondary);
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    line-height: 1.4;
}

.help-content.hidden {
    display: none;
}

.help-content pre {
    background: rgba(0, 0, 0, 0.5);
    border: 1px solid var(--border-glass);
    border-radius: 6px;
    padding: 0.6rem;
    overflow-x: auto;
    color: #a7f3d0;
}

.help-note {
    color: var(--text-muted);
}

/* Metrics Dashboard Cards Grid */
.metrics-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.25rem;
}

.metric-card {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    min-height: 155px;
    border-left: 4px solid var(--border-glass);
}

/* Color Code Cards specifically for glowing accents */
.rps-card {
    border-left-color: var(--accent-indigo);
    background: radial-gradient(circle at top left, var(--accent-indigo-glow), transparent 60%), var(--bg-card);
}
.rps-card:hover {
    box-shadow: 0 0 20px rgba(99, 102, 241, 0.15), var(--shadow-premium);
}

.active-card {
    border-left-color: var(--accent-emerald);
    background: radial-gradient(circle at top left, var(--accent-emerald-glow), transparent 60%), var(--bg-card);
}
.active-card:hover {
    box-shadow: 0 0 20px rgba(16, 185, 129, 0.15), var(--shadow-premium);
}

.rw-card {
    border-left-color: var(--accent-amber);
    background: radial-gradient(circle at top left, var(--accent-amber-glow), transparent 60%), var(--bg-card);
}
.rw-card:hover {
    box-shadow: 0 0 20px rgba(251, 191, 36, 0.15), var(--shadow-premium);
}

.totals-card {
    border-left-color: var(--text-secondary);
    background: var(--bg-card);
}

.metric-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-secondary);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.metric-value-container {
    display: flex;
    align-items: baseline;
    gap: 0.75rem;
    margin: 0.75rem 0;
}

.metric-value {
    font-size: 2.2rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    color: #fff;
    font-family: var(--font-mono);
    line-height: 1.1;
}

.metric-footer {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 500;
}

/* Trend Badges */
.trend-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.15rem 0.45rem;
    border-radius: 4px;
    font-size: 0.7rem;
    font-weight: 700;
}

.trend-badge.up {
    background: rgba(16, 185, 129, 0.15);
    color: var(--accent-emerald);
}

.trend-badge.down {
    background: rgba(239, 68, 68, 0.15);
    color: var(--accent-rose);
}

.trend-badge.neutral {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-secondary);
}

.trend-arrow {
    display: inline-block;
    width: 0;
    height: 0;
    border-left: 4px solid transparent;
    border-right: 4px solid transparent;
}

.trend-badge.up .trend-arrow {
    border-bottom: 5px solid currentColor;
}

.trend-badge.down .trend-arrow {
    border-top: 5px solid currentColor;
}

/* Read/Write Grid inside RW Card */
.rw-grid {
    display: flex;
    align-items: center;
    margin: 0.75rem 0;
}

.rw-stat {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.rw-stat-divider {
    width: 1px;
    height: 28px;
    background: var(--border-glass);
    margin: 0 0.85rem;
}

.rw-stat-label {
    font-size: 0.65rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    margin-bottom: 0.25rem;
}

.rw-stat-value {
    font-family: var(--font-mono);
    font-size: 1.35rem;
    font-weight: 700;
    color: #fff;
}

/* Totals Info Grid */
.totals-grid {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
    margin: 0.75rem 0;
    font-size: 0.85rem;
}

.totals-row {
    display: flex;
    justify-content: space-between;
}

.totals-row span {
    color: var(--text-secondary);
}

.totals-row strong {
    font-family: var(--font-mono);
    color: #fff;
    font-weight: 600;
}

/* Dropped Connections Warning Banner */
.dropped-warning {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 0.6rem;
    border-radius: 6px;
    background: rgba(239, 68, 68, 0.15);
    border: 1px solid rgba(239, 68, 68, 0.25);
    color: #fca5a5;
    font-size: 0.7rem;
    font-weight: 600;
    margin-top: 0.5rem;
    animation: flash 2s infinite;
}

.dropped-warning.hidden {
    display: none;
}

/* Chart Container & Card styling */
.chart-card {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.chart-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.chart-header .card-title {
    margin-bottom: 0;
}

.chart-legend {
    display: flex;
    gap: 1rem;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.legend-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    display: inline-block;
}

.legend-dot.rps {
    background-color: var(--accent-indigo);
    box-shadow: 0 0 6px var(--accent-indigo);
}

.legend-dot.active {
    background-color: var(--accent-emerald);
    box-shadow: 0 0 6px var(--accent-emerald);
}

.chart-container {
    position: relative;
    width: 100%;
    height: 320px;
}

/* Footer Styling */
footer.app-footer {
    margin-top: auto;
    text-align: center;
    padding: 1.5rem 0;
    font-size: 0.75rem;
    color: var(--text-muted);
    border-top: 1px solid rgba(255, 255, 255, 0.03);
}

/* Animations */
@keyframes pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.5);
    }
    70% {
        box-shadow: 0 0 0 8px rgba(16, 185, 129, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(16, 185, 129, 0);
    }
}

@keyframes flash {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.6; }
}

/* Responsive Breakpoints */
@media (max-width: 1024px) {
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
    
    .metrics-container, .chart-card {
        grid-column: 1;
    }
}

@media (max-width: 640px) {
    .app-container {
        padding: 1rem;
    }
    
    .header-main {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .status-indicator-group {
        width: 100%;
        justify-content: space-between;
    }
    
    .metric-value {
        font-size: 1.8rem;
    }
    
    .chart-container {
        height: 240px;
    }
}