/* ========================================
   GLOBAL STYLES & RESET
   ======================================== */

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

:root {
    /* Colors */
    --bg-dark: #0a0e27;
    --bg-card: #151932;
    --bg-card-hover: #1a1f3a;
    --bg-button: #1e2442;
    --border-color: #2a3254;
    --text-primary: #e8eaf6;
    --text-secondary: #9fa8da;
    --text-muted: #5c6bc0;
    
    /* Accent Colors */
    --accent-green: #4caf50;
    --accent-green-dark: #388e3c;
    --accent-blue: #2196f3;
    --accent-red: #f44336;
    --accent-orange: #ff9800;
    --accent-yellow: #ffd700;
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 20px rgba(76, 175, 80, 0.4);
    
    /* Typography */
    --font-primary: 'Roboto', sans-serif;
    --font-display: 'Orbitron', sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
}

body {
    font-family: var(--font-primary);
    background: linear-gradient(135deg, #0a0e27 0%, #1a1f3a 100%);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ========================================
   HEADER
   ======================================== */

.header {
    background: var(--bg-card);
    border-bottom: 2px solid var(--accent-green);
    padding: var(--spacing-md) 0;
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-family: var(--font-display);
}

.logo i {
    font-size: 2rem;
    color: var(--accent-green);
}

.logo h1 {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text-primary);
}

.header-status {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.status-indicator {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--bg-button);
    border-radius: 25px;
    border: 1px solid var(--border-color);
}

.status-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--accent-orange);
    animation: pulse 2s infinite;
}

.status-indicator.connected .status-dot {
    background: var(--accent-green);
}

.status-indicator.disconnected .status-dot {
    background: var(--accent-red);
    animation: none;
}

.status-text {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
}

/* ========================================
   MAIN CONTENT & GRID
   ======================================== */

.main-content {
    padding: var(--spacing-lg) 0;
    min-height: calc(100vh - 180px);
}

.walkie-grid {
    display: grid;
    grid-template-columns: 280px 1fr 320px;
    gap: var(--spacing-md);
    align-items: start;
}

/* ========================================
   LEFT PANEL - Channels & Users
   ======================================== */

.left-panel {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.user-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: var(--spacing-md);
    box-shadow: var(--shadow-sm);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.user-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-green));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
}

.user-info {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

#usernameInput {
    background: var(--bg-button);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 0.5rem;
    color: var(--text-primary);
    font-size: 1rem;
    font-weight: 500;
    width: 100%;
}

#usernameInput:focus {
    outline: none;
    border-color: var(--accent-green);
}

.user-id {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-family: monospace;
}

.channel-selector,
.users-list,
.settings-card,
.activity-log,
.info-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: var(--spacing-md);
    box-shadow: var(--shadow-sm);
}

.channel-selector h3,
.users-list h3,
.settings-card h3,
.activity-log h3,
.info-card h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.channels-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.channel-btn {
    background: var(--bg-button);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    padding: var(--spacing-sm);
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--text-primary);
    font-family: var(--font-primary);
    font-size: 0.95rem;
}

.channel-btn:hover {
    background: var(--bg-card-hover);
    border-color: var(--accent-blue);
    transform: translateX(5px);
}

.channel-btn.active {
    background: linear-gradient(135deg, var(--accent-green-dark), var(--accent-green));
    border-color: var(--accent-green);
    box-shadow: var(--shadow-glow);
}

.channel-number {
    width: 32px;
    height: 32px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-family: var(--font-display);
}

.channel-name {
    flex: 1;
    font-weight: 500;
}

.channel-users {
    background: rgba(255, 255, 255, 0.1);
    padding: 0.25rem 0.5rem;
    border-radius: 12px;
    font-size: 0.85rem;
    font-weight: 600;
}

.users-container {
    max-height: 300px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.user-item {
    background: var(--bg-button);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: var(--spacing-xs) var(--spacing-sm);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    transition: all 0.3s ease;
}

.user-item:hover {
    background: var(--bg-card-hover);
}

.user-item.speaking {
    border-color: var(--accent-green);
    background: rgba(76, 175, 80, 0.1);
}

.user-item i {
    color: var(--accent-blue);
}

.user-item.speaking i {
    color: var(--accent-green);
    animation: pulse 1s infinite;
}

.user-name {
    flex: 1;
    font-size: 0.9rem;
    font-weight: 500;
}

.no-users {
    text-align: center;
    color: var(--text-muted);
    padding: var(--spacing-md);
    font-style: italic;
}

/* ========================================
   CENTER PANEL - Push to Talk
   ======================================== */

.center-panel {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    align-items: center;
}

.audio-visualizer {
    width: 100%;
    height: 150px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

#audioCanvas {
    width: 100%;
    height: 100%;
}

.ptt-container {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
}

.ptt-ring {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 240px;
    height: 240px;
    border: 3px solid var(--accent-green);
    border-radius: 50%;
    opacity: 0;
    pointer-events: none;
}

.ptt-button {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent-green-dark), var(--accent-green));
    border: 5px solid var(--accent-green);
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    color: white;
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 700;
    box-shadow: var(--shadow-lg), var(--shadow-glow);
    transition: all 0.2s ease;
    position: relative;
    z-index: 10;
}

.ptt-button:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-lg), 0 0 30px rgba(76, 175, 80, 0.6);
}

.ptt-button:active,
.ptt-button.active {
    transform: scale(0.95);
    background: linear-gradient(135deg, var(--accent-red), #ff5252);
    border-color: var(--accent-red);
    box-shadow: var(--shadow-lg), 0 0 40px rgba(244, 67, 54, 0.6);
}

.ptt-button.active .ptt-ring {
    opacity: 1;
    animation: ringPulse 1.5s infinite;
}

.ptt-button i {
    font-size: 3rem;
}

.ptt-text {
    font-size: 0.9rem;
    letter-spacing: 2px;
}

.ptt-hint {
    font-size: 0.7rem;
    opacity: 0.8;
    font-weight: 400;
}

.ptt-button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.transmission-indicator,
.receiving-indicator {
    display: none;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: 25px;
    font-weight: 600;
    font-size: 0.95rem;
    animation: fadeIn 0.3s ease;
}

.transmission-indicator {
    background: rgba(244, 67, 54, 0.2);
    border: 2px solid var(--accent-red);
    color: var(--accent-red);
}

.receiving-indicator {
    background: rgba(33, 150, 243, 0.2);
    border: 2px solid var(--accent-blue);
    color: var(--accent-blue);
}

.transmission-indicator.active,
.receiving-indicator.active {
    display: flex;
}

.tx-wave,
.rx-wave {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    position: relative;
}

.tx-wave {
    background: var(--accent-red);
    animation: wave 1s infinite;
}

.rx-wave {
    background: var(--accent-blue);
    animation: wave 1s infinite;
}

.audio-levels {
    width: 100%;
    max-width: 500px;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.level-bar {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.level-bar label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.level-meter {
    width: 100%;
    height: 24px;
    background: var(--bg-button);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    position: relative;
}

.level-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-green), var(--accent-yellow), var(--accent-red));
    border-radius: 12px;
    width: 0%;
    transition: width 0.1s ease;
}

/* ========================================
   RIGHT PANEL - Settings & Info
   ======================================== */

.right-panel {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-sm);
}

.control-group label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.control-group input[type="range"] {
    width: 100%;
    height: 6px;
    background: var(--bg-button);
    border-radius: 3px;
    outline: none;
    -webkit-appearance: none;
}

.control-group input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 18px;
    height: 18px;
    background: var(--accent-green);
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.3s ease;
}

.control-group input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.2);
    box-shadow: 0 0 10px rgba(76, 175, 80, 0.6);
}

.control-value {
    font-size: 0.85rem;
    color: var(--accent-green);
    font-weight: 600;
    text-align: right;
}

.toggle-switch {
    position: relative;
    display: inline-block;
    width: 50px;
    height: 26px;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-switch label {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--bg-button);
    border: 1px solid var(--border-color);
    border-radius: 26px;
    transition: 0.4s;
}

.toggle-switch label:before {
    position: absolute;
    content: "";
    height: 18px;
    width: 18px;
    left: 3px;
    bottom: 3px;
    background-color: var(--text-muted);
    border-radius: 50%;
    transition: 0.4s;
}

.toggle-switch input:checked + label {
    background-color: var(--accent-green);
    border-color: var(--accent-green);
}

.toggle-switch input:checked + label:before {
    background-color: white;
    transform: translateX(24px);
}

.log-container {
    max-height: 250px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.log-entry {
    padding: var(--spacing-xs);
    background: var(--bg-button);
    border-left: 3px solid var(--accent-blue);
    border-radius: 4px;
    font-size: 0.85rem;
    display: flex;
    gap: var(--spacing-xs);
}

.log-time {
    color: var(--text-muted);
    font-family: monospace;
    font-size: 0.75rem;
    min-width: 50px;
}

.log-message {
    color: var(--text-secondary);
}

.log-entry.success {
    border-left-color: var(--accent-green);
}

.log-entry.error {
    border-left-color: var(--accent-red);
}

.log-entry.warning {
    border-left-color: var(--accent-orange);
}

.info-card ul {
    list-style: none;
    padding: 0;
}

.info-card li {
    padding: var(--spacing-xs) 0;
    color: var(--text-secondary);
    font-size: 0.9rem;
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-xs);
}

.info-card li:before {
    content: "▸";
    color: var(--accent-green);
    font-weight: bold;
}

.info-card strong {
    color: var(--text-primary);
}

.info-note {
    margin-top: var(--spacing-sm);
    padding: var(--spacing-sm);
    background: rgba(255, 152, 0, 0.1);
    border: 1px solid var(--accent-orange);
    border-radius: 6px;
    font-size: 0.85rem;
    color: var(--accent-orange);
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-xs);
}

.info-note i {
    margin-top: 2px;
}

/* ========================================
   FOOTER
   ======================================== */

.footer {
    background: var(--bg-card);
    border-top: 1px solid var(--border-color);
    padding: var(--spacing-md) 0;
    text-align: center;
    margin-top: var(--spacing-xl);
}

.footer .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.footer-links {
    display: flex;
    gap: var(--spacing-md);
}

.footer-links span {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.footer-links i {
    color: var(--accent-green);
}

/* ========================================
   ANIMATIONS
   ======================================== */

@keyframes pulse {
    0%, 100% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.6;
        transform: scale(0.9);
    }
}

@keyframes ringPulse {
    0% {
        transform: translate(-50%, -50%) scale(1);
        opacity: 0.6;
    }
    100% {
        transform: translate(-50%, -50%) scale(1.3);
        opacity: 0;
    }
}

@keyframes wave {
    0%, 100% {
        transform: scale(1);
        opacity: 1;
    }
    50% {
        transform: scale(1.3);
        opacity: 0.5;
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ========================================
   SCROLLBAR STYLING
   ======================================== */

.users-container::-webkit-scrollbar,
.log-container::-webkit-scrollbar {
    width: 6px;
}

.users-container::-webkit-scrollbar-track,
.log-container::-webkit-scrollbar-track {
    background: var(--bg-button);
    border-radius: 3px;
}

.users-container::-webkit-scrollbar-thumb,
.log-container::-webkit-scrollbar-thumb {
    background: var(--accent-green);
    border-radius: 3px;
}

/* ========================================
   RESPONSIVE DESIGN
   ======================================== */

@media (max-width: 1200px) {
    .walkie-grid {
        grid-template-columns: 250px 1fr 280px;
        gap: var(--spacing-sm);
    }
    
    .ptt-button {
        width: 180px;
        height: 180px;
    }
    
    .ptt-button i {
        font-size: 2.5rem;
    }
}

@media (max-width: 992px) {
    .walkie-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .left-panel,
    .right-panel {
        order: 2;
    }
    
    .center-panel {
        order: 1;
    }
    
    .ptt-button {
        width: 200px;
        height: 200px;
    }
    
    .ptt-button i {
        font-size: 3rem;
    }
}

@media (max-width: 768px) {
    .header .container {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .logo h1 {
        font-size: 1.5rem;
    }
    
    .footer .container {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .footer-links {
        flex-direction: column;
        gap: var(--spacing-xs);
    }
    
    .ptt-button {
        width: 160px;
        height: 160px;
    }
    
    .ptt-button i {
        font-size: 2.5rem;
    }
    
    .ptt-text {
        font-size: 0.8rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .logo i {
        font-size: 1.5rem;
    }
    
    .logo h1 {
        font-size: 1.2rem;
    }
    
    .ptt-button {
        width: 140px;
        height: 140px;
    }
    
    .ptt-button i {
        font-size: 2rem;
    }
    
    .ptt-text {
        font-size: 0.7rem;
    }
    
    .audio-visualizer {
        height: 100px;
    }
}