:root {
    --primary: #0084ff;
    --primary-dark: #0066cc;
    --background: #f7f9fc;
    --card-bg: #ffffff;
    --text-primary: #050505;
    --text-secondary: #65676b;
    --border: #e4e6eb;
    --success: #31a24c;
    --warning: #f7b928;
    --error: #fa383e;
    --online: #31a24c;
    --offline: #65676b;
    --call-active: #31a24c;
    --call-end: #fa383e;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--background);
    color: var(--text-primary);
    line-height: 1.5;
    height: 100vh;
    display: flex;
    flex-direction: column;
}

.app-container {
    display: flex;
    height: 100%;
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.05);
}

/* Sidebar */
.sidebar {
    width: 350px;
    background-color: var(--card-bg);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    height: 100%;
}

.user-profile {
    padding: 20px;
    display: flex;
    align-items: center;
    border-bottom: 1px solid var(--border);
}

.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    margin-right: 12px;
}

.user-info {
    flex: 1;
}

.user-name {
    font-weight: 600;
    font-size: 16px;
}

.user-status {
    font-size: 12px;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
}

.status-indicator {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    margin-right: 6px;
    background-color: var(--offline);
}

.status-indicator.online {
    background-color: var(--online);
}

.peer-id-container {
    padding: 12px 20px;
    background-color: rgba(0, 132, 255, 0.05);
    border-bottom: 1px solid var(--border);
}

.peer-id-label {
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.peer-id-value {
    display: flex;
    align-items: center;
}

.peer-id {
    font-family: 'Menlo', 'Monaco', monospace;
    font-size: 13px;
    flex: 1;
    word-break: break-all;
}

.id-actions {
    display: flex;
    gap: 8px;
}

.icon-button {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background-color: transparent;
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--text-secondary);
    transition: all 0.2s;
}

.icon-button:hover {
    background-color: rgba(0, 0, 0, 0.05);
    color: var(--text-primary);
}

.connection-form {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border);
}

.form-group {
    margin-bottom: 12px;
}

.form-label {
    display: block;
    font-size: 13px;
    margin-bottom: 6px;
    color: var(--text-secondary);
}

.form-input {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-family: inherit;
    font-size: 14px;
    transition: border-color 0.2s;
}

.form-input:focus {
    outline: none;
    border-color: var(--primary);
}

.button {
    padding: 10px 16px;
    background-color: var(--primary);
    color: white;
    border: none;
    border-radius: 8px;
    font-family: inherit;
    font-weight: 500;
    font-size: 14px;
    cursor: pointer;
    width: 100%;
    transition: background-color 0.2s;
}

.button:hover {
    background-color: var(--primary-dark);
}

.button:disabled {
    background-color: #b3d7ff;
    cursor: not-allowed;
}

.status-container {
    padding: 12px 20px;
    font-size: 13px;
    border-bottom: 1px solid var(--border);
}

.status-message {
    padding: 8px 12px;
    border-radius: 8px;
    background-color: rgba(0, 0, 0, 0.03);
}

.status-message.connected {
    background-color: rgba(49, 162, 76, 0.1);
    color: var(--success);
}

.status-message.calling {
    background-color: rgba(247, 185, 40, 0.1);
    color: var(--warning);
}

.status-message.error {
    background-color: rgba(250, 56, 62, 0.1);
    color: var(--error);
}

/* Main Chat Area */
.chat-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    background-color: var(--card-bg);
    position: relative;
}

.chat-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
}

.chat-peer-name {
    font-weight: 600;
    font-size: 16px;
}

.chat-peer-status {
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: 2px;
    display: flex;
    align-items: center;
}

.chat-actions {
    margin-left: auto;
    display: flex;
    gap: 8px;
}

.chat-messages {
    flex: 1;
    padding: 20px;
    overflow-y: auto;
    background-color: #f0f2f5;
    background-image: url("data:image/svg+xml,%3Csvg width='100' height='100' viewBox='0 0 100 100' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M11 18c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm48 25c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm-43-7c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zm63 31c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zM34 90c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zm56-76c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zM12 86c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm28-65c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm23-11c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm-6 60c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm29 22c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zM32 63c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm57-13c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm-9-21c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM60 91c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM35 41c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM12 60c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2z' fill='%23e4e6eb' fill-opacity='0.2' fill-rule='evenodd'/%3E%3C/svg%3E");
}

.message {
    max-width: 70%;
    margin-bottom: 16px;
    display: flex;
    flex-direction: column;
}

.message-local {
    align-self: flex-end;
}

.message-remote {
    align-self: flex-start;
}

.message-bubble {
    padding: 12px 16px;
    border-radius: 18px;
    font-size: 14px;
    line-height: 1.4;
    position: relative;
    word-wrap: break-word;
}

.message-local .message-bubble {
    background-color: var(--primary);
    color: white;
    border-top-right-radius: 4px;
}

.message-remote .message-bubble {
    background-color: var(--card-bg);
    color: var(--text-primary);
    border-top-left-radius: 4px;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

.message-time {
    font-size: 11px;
    color: var(--text-secondary);
    margin-top: 4px;
    text-align: right;
}

.message-system {
    align-self: center;
    text-align: center;
    font-size: 13px;
    color: var(--text-secondary);
    margin: 16px 0;
    padding: 8px 16px;
    background-color: rgba(0, 0, 0, 0.05);
    border-radius: 18px;
}

.message-input-container {
    padding: 16px;
    border-top: 1px solid var(--border);
    background-color: var(--card-bg);
}

.message-input-wrapper {
    display: flex;
    align-items: center;
    gap: 8px;
}

.message-input {
    flex: 1;
    padding: 12px 16px;
    border: 1px solid var(--border);
    border-radius: 20px;
    font-family: inherit;
    font-size: 14px;
    resize: none;
    max-height: 120px;
    transition: border-color 0.2s;
}

.message-input:focus {
    outline: none;
    border-color: var(--primary);
}

.send-button {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--primary);
    color: white;
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: background-color 0.2s;
}

.send-button:hover {
    background-color: var(--primary-dark);
}

.send-button:disabled {
    background-color: #b3d7ff;
    cursor: not-allowed;
}

/* Call UI */
.call-container {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.8);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 100;
    color: white;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s;
}

.call-container.active {
    opacity: 1;
    pointer-events: all;
}

.call-peer-info {
    text-align: center;
    margin-bottom: 40px;
}

.call-peer-name {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 8px;
}

.call-status {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.8);
}

.call-timer {
    font-size: 16px;
    margin-top: 8px;
    font-family: 'Menlo', 'Monaco', monospace;
}

.call-avatar {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    background-color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 48px;
    font-weight: 600;
    margin-bottom: 40px;
}

.call-controls {
    display: flex;
    gap: 24px;
    margin-top: 40px;
}

.call-button {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s;
}

.call-button-primary {
    background-color: var(--call-active);
}

.call-button-primary:hover {
    background-color: #2a8c42;
}

.call-button-danger {
    background-color: var(--call-end);
}

.call-button-danger:hover {
    background-color: #d83237;
}

.call-button-secondary {
    background-color: rgba(255, 255, 255, 0.1);
}

.call-button-secondary:hover {
    background-color: rgba(255, 255, 255, 0.2);
}

.call-audio-container {
    display: none;
}

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

.pulse {
    animation: pulse 2s infinite;
}

/* Responsive */
@media (max-width: 992px) {
    .sidebar {
        width: 300px;
    }
}

@media (max-width: 768px) {
    .app-container {
        flex-direction: column;
        height: auto;
        min-height: 100vh;
    }
    
    .sidebar {
        width: 100%;
        height: auto;
        border-right: none;
        border-bottom: 1px solid var(--border);
    }
    
    .chat-container {
        height: calc(100vh - 400px);
        min-height: 300px;
    }
    
    .user-profile {
        padding: 15px;
    }
    
    .peer-id-container, 
    .connection-form, 
    .status-container {
        padding: 12px 15px;
    }
    
    .chat-header {
        padding: 12px 15px;
    }
    
    .chat-messages {
        padding: 15px;
    }
    
    .message-input-container {
        padding: 12px;
    }
    
    .call-peer-name {
        font-size: 20px;
    }
    
    .call-status {
        font-size: 14px;
    }
    
    .call-avatar {
        width: 100px;
        height: 100px;
        font-size: 40px;
        margin-bottom: 30px;
    }
    
    .call-controls {
        margin-top: 30px;
        gap: 20px;
    }
    
    .call-button {
        width: 50px;
        height: 50px;
    }
}

@media (max-width: 480px) {
    .user-avatar {
        width: 36px;
        height: 36px;
        font-size: 14px;
    }
    
    .user-name {
        font-size: 15px;
    }
    
    .peer-id {
        font-size: 12px;
    }
    
    .icon-button {
        width: 28px;
        height: 28px;
    }
    
    .form-input, .button {
        padding: 8px 12px;
    }
    
    .chat-peer-name {
        font-size: 15px;
    }
    
    .message-bubble {
        padding: 10px 14px;
        font-size: 13px;
    }
    
    .message-input {
        padding: 10px 14px;
    }
    
    .send-button {
        width: 36px;
        height: 36px;
    }
    
    .call-avatar {
        width: 80px;
        height: 80px;
        font-size: 32px;
        margin-bottom: 20px;
    }
    
    .call-controls {
        gap: 16px;
    }
    
    .call-button {
        width: 46px;
        height: 46px;
    }
}