:root {
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-tertiary: #21262d;
    --text-primary: #e6edf3;
    --text-secondary: #8b949e;
    --accent-blue: #58a6ff;
    --accent-cyan: #22D3EE;
    --accent-green: #3fb950;
    --accent-orange: #f97316;
    --accent-red: #f85149;
    --border-color: rgba(255, 255, 255, 0.1);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

/* Header */
.page-header {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    padding: 12px 24px;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    max-width: 1600px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 16px;
}

.back-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    transition: color 0.2s;
}

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

.page-title {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 20px;
    font-weight: 600;
}

.page-title-icon {
    font-size: 28px;
}

.online-indicator {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: var(--text-secondary);
    background: var(--bg-tertiary);
    padding: 6px 12px;
    border-radius: 20px;
}

.online-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--accent-green);
    animation: pulse 2s infinite;
}

@keyframes pulse {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.5;
    }
}

/* Main Layout */
.arena-container {
    max-width: 1600px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 280px 1fr 320px;
    gap: 0;
    height: calc(100vh - 60px);
}

@media (max-width: 1200px) {
    .arena-container {
        grid-template-columns: 1fr 320px;
    }

    .sidebar-left {
        display: none;
    }
}

@media (max-width: 768px) {
    .arena-container {
        grid-template-columns: 1fr;
    }

    .sidebar-right {
        display: none;
    }
}

/* Left Sidebar - War Rooms */
.sidebar-left {
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.sidebar-header {
    padding: 16px;
    border-bottom: 1px solid var(--border-color);
}

.sidebar-title {
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-secondary);
}

.rooms-list {
    flex: 1;
    overflow-y: auto;
    padding: 8px;
}

.room-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    border-radius: 8px;
    cursor: pointer;
    transition: background 0.2s;
    margin-bottom: 4px;
}

.room-item:hover {
    background: var(--bg-tertiary);
}

.room-item.active {
    background: rgba(88, 166, 255, 0.15);
    border: 1px solid rgba(88, 166, 255, 0.3);
}

.room-icon {
    font-size: 20px;
    width: 32px;
    text-align: center;
}

.room-info {
    flex: 1;
    min-width: 0;
}

.room-name {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.room-description {
    font-size: 11px;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.room-count {
    font-size: 11px;
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    padding: 2px 6px;
    border-radius: 10px;
}

.room-item.active .room-count {
    background: rgba(88, 166, 255, 0.3);
    color: var(--accent-blue);
}

/* Main Chat Area */
.main-chat {
    display: flex;
    flex-direction: column;
    background: var(--bg-primary);
    overflow: hidden;
}

.chat-welcome {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 40px;
    text-align: center;
}

.welcome-icon {
    font-size: 64px;
    margin-bottom: 24px;
}

.welcome-title {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 12px;
    background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-cyan) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.welcome-text {
    font-size: 14px;
    color: var(--text-secondary);
    max-width: 400px;
    line-height: 1.6;
}

.welcome-actions {
    display: flex;
    gap: 12px;
    margin-top: 24px;
}

.welcome-btn {
    padding: 12px 24px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
}

.welcome-btn-primary {
    background: var(--accent-blue);
    color: white;
    border: none;
}

.welcome-btn-primary:hover {
    opacity: 0.9;
    transform: translateY(-1px);
}

.welcome-btn-secondary {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

.welcome-btn-secondary:hover {
    border-color: var(--accent-blue);
    color: var(--accent-blue);
}

/* Right Sidebar - Users & SOS */
.sidebar-right {
    background: var(--bg-secondary);
    border-left: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.users-section {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.users-list {
    flex: 1;
    overflow-y: auto;
    padding: 8px;
}

.sos-section {
    border-top: 1px solid var(--border-color);
    max-height: 40%;
    overflow-y: auto;
}

.sos-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    background: var(--bg-tertiary);
    position: sticky;
    top: 0;
}

.sos-title {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--accent-red);
}

.sos-count {
    background: var(--accent-red);
    color: white;
    font-size: 10px;
    padding: 2px 6px;
    border-radius: 10px;
}

.sos-list {
    padding: 8px;
}

/* SOS Broadcast Button */
.sos-broadcast-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: calc(100% - 16px);
    margin: 8px;
    padding: 12px;
    background: linear-gradient(135deg, rgba(248, 81, 73, 0.2) 0%, rgba(210, 153, 34, 0.2) 100%);
    border: 1px solid rgba(248, 81, 73, 0.4);
    border-radius: 8px;
    color: var(--accent-red);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.sos-broadcast-btn:hover {
    background: linear-gradient(135deg, rgba(248, 81, 73, 0.3) 0%, rgba(210, 153, 34, 0.3) 100%);
    transform: translateY(-1px);
}

/* SOS Modal */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s;
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    width: 90%;
    max-width: 480px;
    padding: 24px;
    transform: translateY(20px);
    transition: transform 0.3s;
}

.modal-overlay.active .modal {
    transform: translateY(0);
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
}

.modal-title {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 18px;
    font-weight: 600;
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 24px;
    cursor: pointer;
    padding: 4px;
}

.modal-close:hover {
    color: var(--text-primary);
}

.modal-body {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-label {
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
}

.form-input {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 12px;
    font-size: 14px;
    color: var(--text-primary);
    outline: none;
    transition: border-color 0.2s;
}

.form-input:focus {
    border-color: var(--accent-blue);
}

.form-textarea {
    min-height: 100px;
    resize: vertical;
}

.form-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.form-tag {
    padding: 6px 12px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    font-size: 12px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s;
}

.form-tag:hover,
.form-tag.selected {
    background: rgba(88, 166, 255, 0.2);
    border-color: var(--accent-blue);
    color: var(--accent-blue);
}

.modal-actions {
    display: flex;
    gap: 12px;
    margin-top: 8px;
}

.modal-btn {
    flex: 1;
    padding: 12px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.modal-btn-primary {
    background: var(--accent-red);
    color: white;
    border: none;
}

.modal-btn-primary:hover {
    opacity: 0.9;
}

.modal-btn-secondary {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

.modal-btn-secondary:hover {
    border-color: var(--text-primary);
    color: var(--text-primary);
}

/* Loading State */
.loading-container {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px;
}

.spinner {
    width: 32px;
    height: 32px;
    border: 3px solid var(--border-color);
    border-top-color: var(--accent-blue);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* Mobile Nav */
.mobile-tabs {
    display: none;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 8px;
}

@media (max-width: 768px) {
    .mobile-tabs {
        display: flex;
        gap: 8px;
    }

    .mobile-tab {
        flex: 1;
        padding: 12px;
        background: var(--bg-tertiary);
        border: none;
        border-radius: 8px;
        color: var(--text-secondary);
        font-size: 12px;
        font-weight: 500;
        cursor: pointer;
        text-align: center;
    }

    .mobile-tab.active {
        background: var(--accent-blue);
        color: white;
    }
}