/**
 * Walkie-Talkie Styles
 * Dark mode minimalist design with subtle animations
 */

/* CSS Variables */
:root {
    --bg-primary: #0f0f0f;
    --bg-secondary: #1a1a1a;
    --bg-tertiary: #252525;
    --bg-hover: #2a2a2a;
    
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --text-muted: #666666;
    
    --accent-green: #22c55e;
    --accent-green-dim: rgba(34, 197, 94, 0.2);
    --accent-purple: #a855f7;
    --accent-purple-dim: rgba(168, 85, 247, 0.2);
    --accent-red: #ef4444;
    --accent-red-dim: rgba(239, 68, 68, 0.2);
    --accent-blue: #3b82f6;
    
    --border-color: #333333;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
    
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --transition: all 0.2s ease;
}

/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html, body {
    height: 100%;
    font-family: var(--font-family);
    background: var(--bg-primary);
    color: var(--text-primary);
    overflow: hidden;
}

/* Utility Classes */
.hidden {
    display: none !important;
}

/* Screen Container */
.screen {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
}

/* Nickname Screen */
#nickname-screen {
    justify-content: center;
    align-items: center;
    background: linear-gradient(135deg, var(--bg-primary) 0%, #1a1a2e 100%);
}

.nickname-container {
    text-align: center;
    padding: 2rem;
    max-width: 400px;
    width: 100%;
}

.logo {
    margin-bottom: 2rem;
}

.logo-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

.logo h1 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1rem;
}

.nickname-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

#nickname-input {
    padding: 1rem 1.25rem;
    font-size: 1rem;
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    color: var(--text-primary);
    outline: none;
    transition: var(--transition);
}

#nickname-input:focus {
    border-color: var(--accent-green);
    box-shadow: 0 0 0 4px var(--accent-green-dim);
}

#nickname-input::placeholder {
    color: var(--text-muted);
}

.primary-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 1rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    background: var(--accent-green);
    color: var(--bg-primary);
    border: none;
    border-radius: 12px;
    cursor: pointer;
    transition: var(--transition);
}

.primary-btn:hover {
    background: #16a34a;
    transform: translateY(-2px);
}

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

.hint {
    margin-top: 1.5rem;
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* App Header */
.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
}

.header-left {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo-small {
    font-size: 1.5rem;
}

.app-title {
    font-weight: 600;
    font-size: 1.1rem;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.user-badge {
    padding: 0.5rem 1rem;
    background: var(--bg-tertiary);
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
}

.user-badge.admin::before {
    content: '👑 ';
}

.icon-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--bg-tertiary);
    border: none;
    border-radius: 10px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
}

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

/* App Main */
.app-main {
    flex: 1;
    overflow-y: auto;
    padding: 1.5rem;
}

/* Channel Selection Grid */
.channel-grid h2 {
    margin-bottom: 1.5rem;
    font-size: 1.25rem;
    font-weight: 600;
}

.channels {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1rem;
}

.channel-btn {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    padding: 1.5rem;
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 16px;
    cursor: pointer;
    transition: var(--transition);
    text-align: left;
}

.channel-btn:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow);
}

.channel-btn.green {
    border-color: var(--accent-green-dim);
}

.channel-btn.green:hover {
    border-color: var(--accent-green);
    background: var(--accent-green-dim);
}

.channel-btn.purple {
    border-color: var(--accent-purple-dim);
}

.channel-btn.purple:hover {
    border-color: var(--accent-purple);
    background: var(--accent-purple-dim);
}

.channel-btn.emg {
    border-color: var(--accent-red-dim);
    background: rgba(239, 68, 68, 0.1);
}

.channel-btn.emg:hover {
    border-color: var(--accent-red);
    background: var(--accent-red-dim);
    animation: emg-pulse 1s ease-in-out infinite;
}

@keyframes emg-pulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.4); }
    50% { box-shadow: 0 0 20px 5px rgba(239, 68, 68, 0.2); }
}

.channel-number {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    font-size: 1.5rem;
    font-weight: 700;
    border-radius: 12px;
    margin-bottom: 1rem;
}

.channel-btn.green .channel-number {
    background: var(--accent-green-dim);
    color: var(--accent-green);
}

.channel-btn.purple .channel-number {
    background: var(--accent-purple-dim);
    color: var(--accent-purple);
}

.channel-btn.emg .channel-number {
    background: var(--accent-red-dim);
    color: var(--accent-red);
    font-size: 1.8rem;
}

.channel-label {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.channel-users {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* Channel View */
.channel-view {
    display: flex;
    flex-direction: column;
    height: 100%;
}

.channel-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.channel-info h2 {
    font-size: 1.25rem;
    font-weight: 600;
}

.channel-type {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.channel-type.green {
    color: var(--accent-green);
}

.channel-type.purple {
    color: var(--accent-purple);
}

.channel-type.emg {
    color: var(--accent-red);
}

/* Voice Controls */
.voice-controls {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 2rem 0;
}

.mode-selector {
    display: flex;
    gap: 0.5rem;
    padding: 0.25rem;
    background: var(--bg-secondary);
    border-radius: 12px;
    margin-bottom: 2rem;
}

.mode-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.25rem;
    background: transparent;
    border: none;
    border-radius: 10px;
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

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

.mode-btn.active {
    background: var(--accent-green);
    color: var(--bg-primary);
}

/* PTT Button */
.ptt-container {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.ptt-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    background: none;
    border: none;
    cursor: pointer;
    user-select: none;
    -webkit-user-select: none;
    touch-action: manipulation;
}

.ptt-inner {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 120px;
    height: 120px;
    background: var(--bg-secondary);
    border: 4px solid var(--border-color);
    border-radius: 50%;
    color: var(--text-secondary);
    transition: var(--transition);
}

.ptt-btn:hover .ptt-inner {
    border-color: var(--accent-green);
    color: var(--accent-green);
}

.ptt-btn:active .ptt-inner,
.ptt-btn.active .ptt-inner {
    background: var(--accent-green);
    border-color: var(--accent-green);
    color: var(--bg-primary);
    transform: scale(0.95);
    box-shadow: 0 0 30px var(--accent-green-dim);
}

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

/* VAD Container */
.vad-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
}

.vad-indicator {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.vad-bars {
    display: flex;
    align-items: flex-end;
    gap: 4px;
    height: 60px;
}

.vad-bar {
    width: 8px;
    height: 20px;
    background: var(--border-color);
    border-radius: 4px;
    transition: height 0.1s ease, background 0.1s ease;
}

.vad-container.speaking .vad-bar {
    background: var(--accent-green);
    animation: vad-pulse 0.3s ease-in-out infinite alternate;
}

.vad-bar:nth-child(1) { animation-delay: 0s; }
.vad-bar:nth-child(2) { animation-delay: 0.1s; }
.vad-bar:nth-child(3) { animation-delay: 0.2s; }
.vad-bar:nth-child(4) { animation-delay: 0.1s; }
.vad-bar:nth-child(5) { animation-delay: 0s; }

@keyframes vad-pulse {
    0% { height: 20px; }
    100% { height: 60px; }
}

#vad-status {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.vad-container.speaking #vad-status {
    color: var(--accent-green);
}

.vad-sensitivity {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.vad-sensitivity label {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.vad-sensitivity input[type="range"] {
    width: 200px;
    height: 6px;
    background: var(--bg-tertiary);
    border-radius: 3px;
    outline: none;
    -webkit-appearance: none;
}

.vad-sensitivity input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 18px;
    height: 18px;
    background: var(--accent-green);
    border-radius: 50%;
    cursor: pointer;
}

/* Speaking Indicator */
.speaking-indicator {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 1.5rem;
    background: var(--bg-secondary);
    border: 1px solid var(--accent-green);
    border-radius: 12px;
    margin: 1.5rem 0;
}

.speaking-animation {
    display: flex;
    gap: 3px;
}

.wave {
    width: 4px;
    height: 20px;
    background: var(--accent-green);
    border-radius: 2px;
    animation: wave 0.5s ease-in-out infinite;
}

.wave:nth-child(2) {
    animation-delay: 0.1s;
}

.wave:nth-child(3) {
    animation-delay: 0.2s;
}

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

#speaking-nickname {
    font-weight: 600;
    color: var(--accent-green);
}

.speaking-label {
    color: var(--text-secondary);
}

/* User List */
.user-list-container {
    margin-top: auto;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
}

.user-list-container h3 {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.user-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.user-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 1rem;
    background: var(--bg-secondary);
    border-radius: 10px;
    transition: var(--transition);
}

.user-item.speaking {
    background: var(--accent-green-dim);
    border: 1px solid var(--accent-green);
}

.user-info {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.user-avatar {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-tertiary);
    border-radius: 50%;
    font-size: 0.9rem;
}

.user-item.speaking .user-avatar {
    background: var(--accent-green);
}

.user-name {
    font-weight: 500;
}

.user-name.admin::after {
    content: ' 👑';
}

.user-speaking-icon {
    display: none;
    color: var(--accent-green);
}

.user-item.speaking .user-speaking-icon {
    display: block;
    animation: pulse 1s ease-in-out infinite;
}

.kick-btn {
    padding: 0.5rem 0.75rem;
    font-size: 0.8rem;
    background: var(--accent-red);
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    opacity: 0;
    transition: var(--transition);
}

.user-item:hover .kick-btn {
    opacity: 1;
}

.kick-btn:hover {
    background: #dc2626;
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal-content {
    background: var(--bg-secondary);
    padding: 2rem;
    border-radius: 16px;
    text-align: center;
    max-width: 400px;
    width: 90%;
}

.modal-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.modal-content h2 {
    margin-bottom: 0.5rem;
}

.modal-content p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

/* Responsive */
@media (max-width: 600px) {
    .app-main {
        padding: 1rem;
    }
    
    .channels {
        grid-template-columns: 1fr;
    }
    
    .mode-selector {
        flex-direction: column;
    }
    
    .ptt-inner {
        width: 100px;
        height: 100px;
    }
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
    background: var(--bg-tertiary);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--border-color);
}


/* EMG Modal Styles */
.emg-modal {
    border: 2px solid var(--accent-red);
    background: linear-gradient(135deg, var(--bg-secondary) 0%, rgba(239, 68, 68, 0.1) 100%);
}

.emg-icon {
    color: var(--accent-red);
}

.emg-icon.pulsing {
    animation: emg-icon-pulse 0.5s ease-in-out infinite;
}

@keyframes emg-icon-pulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.2); opacity: 0.8; }
}

.modal-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

.secondary-btn {
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 500;
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    cursor: pointer;
    transition: var(--transition);
}

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

.danger-btn {
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    background: var(--accent-red);
    color: white;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    transition: var(--transition);
}

.danger-btn:hover {
    background: #dc2626;
}

.emg-redirect {
    font-size: 0.9rem;
    color: var(--accent-red) !important;
    animation: blink 1s ease-in-out infinite;
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* EMG Channel View Styles */
.channel-view.emg-channel .channel-header {
    border-bottom: 2px solid var(--accent-red);
}

.channel-view.emg-channel .channel-info h2 {
    color: var(--accent-red);
}

.channel-view.emg-channel .mode-btn.active {
    background: var(--accent-red);
}

.channel-view.emg-channel .ptt-btn:hover .ptt-inner {
    border-color: var(--accent-red);
    color: var(--accent-red);
}

.channel-view.emg-channel .ptt-btn:active .ptt-inner,
.channel-view.emg-channel .ptt-btn.active .ptt-inner {
    background: var(--accent-red);
    border-color: var(--accent-red);
    box-shadow: 0 0 30px var(--accent-red-dim);
}

.channel-view.emg-channel .speaking-indicator {
    border-color: var(--accent-red);
}

.channel-view.emg-channel #speaking-nickname {
    color: var(--accent-red);
}

.channel-view.emg-channel .speaking-animation .wave {
    background: var(--accent-red);
}

.channel-view.emg-channel .user-item.speaking {
    background: var(--accent-red-dim);
    border-color: var(--accent-red);
}

.channel-view.emg-channel .user-item.speaking .user-avatar {
    background: var(--accent-red);
}

.channel-view.emg-channel .vad-container.speaking .vad-bar {
    background: var(--accent-red);
}

.channel-view.emg-channel .vad-container.speaking #vad-status {
    color: var(--accent-red);
}

.channel-view.emg-channel .vad-sensitivity input[type="range"]::-webkit-slider-thumb {
    background: var(--accent-red);
}