/* ==========================================================================
   CSS GLOBAL TOKENS & RESET
   ========================================================================== */
:root {
    --bg-dark: #07080e;
    --bg-card: rgba(13, 17, 30, 0.7);
    --border-color: rgba(99, 102, 241, 0.18);
    
    --primary: #6366f1;
    --primary-glow: rgba(99, 102, 241, 0.4);
    --accent: #a855f7;
    --accent-glow: rgba(168, 85, 247, 0.45);
    --emerald: #10b981;
    --rose: #ef4444;
    
    --text-main: #e2e8f0;
    --text-muted: #94a3b8;
    --font-header: 'Outfit', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    
    --transition-smooth: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

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

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    font-family: var(--font-body);
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
    padding: 2rem 1.5rem;
}

/* ==========================================================================
   DYNAMIC GLOWING BACKGROUND
   ========================================================================== */
.glow-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: -1;
    background: 
        radial-gradient(circle at 10% 20%, rgba(99, 102, 241, 0.08) 0%, transparent 40%),
        radial-gradient(circle at 90% 80%, rgba(168, 85, 247, 0.09) 0%, transparent 45%);
    pointer-events: none;
}

/* ==========================================================================
   LAYOUT CONTAINER & CARDS
   ========================================================================== */
.dashboard-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.glassmorphism {
    background: var(--bg-card);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
    transition: var(--transition-smooth);
}

.glassmorphism:hover {
    border-color: rgba(99, 102, 241, 0.3);
    box-shadow: 0 10px 40px 0 rgba(99, 102, 241, 0.1);
}

.card {
    padding: 1.75rem;
}

.card-title {
    font-family: var(--font-header);
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1.25rem;
    background: linear-gradient(135deg, #fff 0%, var(--text-muted) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    padding-bottom: 0.75rem;
}

/* ==========================================================================
   APP HEADER
   ========================================================================== */
.app-header {
    text-align: center;
    margin-bottom: 1rem;
}

.logo-area {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.5rem;
}

.logo-area h1 {
    font-family: var(--font-header);
    font-size: 2.5rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: 0 0 40px rgba(99, 102, 241, 0.2);
}

.pulse-indicator {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background-color: var(--rose);
    box-shadow: 0 0 10px var(--rose);
}

.pulse-indicator.active {
    background-color: var(--emerald);
    box-shadow: 0 0 10px var(--emerald);
    animation: pulse 1.8s infinite;
}

.tagline {
    color: var(--text-muted);
    font-size: 0.95rem;
    font-weight: 400;
    max-width: 600px;
    margin: 0 auto;
}

/* ==========================================================================
   DASHBOARD GRID LAYOUT
   ========================================================================== */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

@media (max-width: 768px) {
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
    .col-span-2 {
        grid-column: span 1 !important;
    }
}

.col-span-2 {
    grid-column: span 2;
}

/* ==========================================================================
   INPUTS & CONTROLS
   ========================================================================== */
.control-group {
    margin-bottom: 1.25rem;
}

.control-group:last-child {
    margin-bottom: 0;
}

label {
    display: block;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.custom-select {
    width: 100%;
    padding: 0.8rem 1rem;
    background-color: rgba(20, 24, 45, 0.8);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-main);
    font-size: 0.9rem;
    font-family: var(--font-body);
    outline: none;
    transition: var(--transition-smooth);
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    background-size: 1.2rem;
}

.custom-select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 8px var(--primary-glow);
}

.input-group input {
    background-color: rgba(20, 24, 45, 0.8);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-main);
    padding: 0.8rem 1rem;
    width: 100%;
    font-family: var(--font-body);
    font-size: 0.9rem;
    outline: none;
    transition: var(--transition-smooth);
}

.input-group input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 8px var(--primary-glow);
}

/* ==========================================================================
   SLIDERS STYLING
   ========================================================================== */
.slider-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.25rem;
}

.slider-value {
    font-family: var(--font-header);
    font-weight: 600;
    color: var(--accent);
    text-shadow: 0 0 8px var(--accent-glow);
    font-size: 0.95rem;
}

.custom-slider {
    -webkit-appearance: none;
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: rgba(99, 102, 241, 0.15);
    outline: none;
    margin: 0.75rem 0;
}

.custom-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    cursor: pointer;
    box-shadow: 0 0 10px var(--primary-glow);
    transition: transform 0.1s ease;
}

.custom-slider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

.slider-ticks {
    display: flex;
    justify-content: space-between;
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* ==========================================================================
   BUTTONS
   ========================================================================== */
.btn {
    padding: 0.8rem 1.5rem;
    border-radius: 8px;
    font-family: var(--font-header);
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    border: none;
    outline: none;
    transition: var(--transition-smooth);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, #4f46e5 100%);
    color: white;
    box-shadow: 0 4px 14px 0 var(--primary-glow);
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px 0 rgba(99, 102, 241, 0.6);
}

.btn-accent {
    background: linear-gradient(135deg, var(--accent) 0%, #7c3aed 100%);
    color: white;
    box-shadow: 0 4px 14px 0 var(--accent-glow);
}

.btn-accent:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px 0 rgba(168, 85, 247, 0.65);
}

.btn:active:not(:disabled) {
    transform: translateY(0);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    box-shadow: none;
}

/* ==========================================================================
   CONNECTION BAR
   ========================================================================== */
.connection-bar {
    padding: 1rem 1.5rem !important;
}

.form-row {
    display: flex;
    align-items: flex-end;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.form-row .input-group {
    flex: 1;
    min-width: 250px;
}

.connection-status-container {
    display: flex;
    align-items: center;
    height: 48px;
}

.status-badge {
    padding: 0.4rem 0.8rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
}

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

.status-badge.connected {
    background-color: rgba(16, 185, 129, 0.15);
    color: var(--emerald);
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.status-badge.connected::before {
    background-color: var(--emerald);
    box-shadow: 0 0 6px var(--emerald);
}

.status-badge.disconnected {
    background-color: rgba(239, 68, 68, 0.15);
    color: var(--rose);
    border: 1px solid rgba(239, 68, 68, 0.3);
}

.status-badge.disconnected::before {
    background-color: var(--rose);
    box-shadow: 0 0 6px var(--rose);
}

.status-badge.connecting {
    background-color: rgba(168, 85, 247, 0.15);
    color: var(--accent);
    border: 1px solid rgba(168, 85, 247, 0.3);
}

.status-badge.connecting::before {
    background-color: var(--accent);
    box-shadow: 0 0 6px var(--accent);
    animation: blink 1s infinite;
}

.btn-group-row {
    display: flex;
    gap: 0.75rem;
    height: 48px;
}

/* ==========================================================================
   MODERN RADIO TILES
   ========================================================================== */
.radio-group-modern {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.5rem;
}

.radio-tile {
    position: relative;
    cursor: pointer;
    margin: 0;
}

.radio-tile input {
    position: absolute;
    opacity: 0;
}

.tile-label {
    display: block;
    padding: 0.6rem;
    background-color: rgba(20, 24, 45, 0.5);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    text-align: center;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-muted);
    transition: var(--transition-smooth);
}

.radio-tile input:checked + .tile-label {
    background-color: rgba(99, 102, 241, 0.12);
    border-color: var(--primary);
    color: var(--text-main);
    box-shadow: 0 0 10px rgba(99, 102, 241, 0.2);
}

.radio-tile:hover .tile-label {
    border-color: rgba(99, 102, 241, 0.4);
}

/* ==========================================================================
   OSCILLOSCOPE WAVEFORM CANVASES
   ========================================================================== */
.visualizer-row {
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.visualizer-container {
    flex: 1;
    min-width: 280px;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.vis-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-muted);
}

.dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
}

.input-dot {
    background-color: var(--primary);
    box-shadow: 0 0 6px var(--primary);
}

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

.waveform-canvas {
    width: 100%;
    height: 150px;
    background-color: #0b0c13;
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.03);
}

/* ==========================================================================
   PERFORMANCE HUD
   ========================================================================== */
.performance-hud {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.85rem 1.75rem !important;
}

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

.hud-label {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-muted);
    font-weight: 500;
}

.hud-value {
    font-family: var(--font-header);
    font-size: 1.1rem;
    font-weight: 700;
    color: white;
}

.hud-separator {
    width: 1px;
    height: 30px;
    background-color: rgba(255, 255, 255, 0.08);
}

.hud-value.text-accent {
    color: var(--accent);
    text-shadow: 0 0 8px var(--accent-glow);
}

.active-badge {
    color: var(--emerald);
    text-shadow: 0 0 6px rgba(16, 185, 129, 0.4);
}

@media (max-width: 600px) {
    .performance-hud {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.75rem;
    }
    .hud-separator {
        display: none;
    }
}

/* ==========================================================================
   KEYFRAME ANIMATIONS
   ========================================================================== */
@keyframes pulse {
    0% {
        transform: scale(0.9);
        box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
    }
    70% {
        transform: scale(1.1);
        box-shadow: 0 0 0 10px rgba(16, 185, 129, 0);
    }
    100% {
        transform: scale(0.9);
        box-shadow: 0 0 0 0 rgba(16, 185, 129, 0);
    }
}

@keyframes blink {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.4;
    }
}