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

html {
    overflow-x: hidden;
    width: 100%;
}

body {
    overflow-x: hidden;
    width: 100%;
    position: relative;
}

:root {
    --terminal-bg: #334155;
    --terminal-fg: #c9d1d9;
    --terminal-secondary: #58a6ff;
    --terminal-accent: #79c0ff;
    --terminal-error: #f85149;
    --terminal-warning: #d29922;
    --terminal-border: #475569;
    --terminal-header-bg: #1e293b;
    --shadow: rgba(88, 166, 255, 0.15);
    --terminal-purple: #bc8cff;
    --terminal-hover: #1f6feb;
}

body {
    font-family: 'JetBrains Mono', 'SF Mono', 'Monaco', 'Inconsolata', 'Fira Code', 'Fira Mono', 'Roboto Mono', 'Ubuntu Mono', 'Courier New', monospace;
    background: linear-gradient(135deg, #475569 0%, #334155 100%);
    color: var(--terminal-fg);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    margin: 0;
    overflow-x: hidden;
    width: 100%;
    position: relative;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

.terminal-window {
    width: 1400px;
    max-width: calc(100vw - 40px);
    min-width: 900px;
    height: 90vh;
    min-height: 90vh;
    max-height: 90vh;
    background: var(--terminal-bg);
    border: 1px solid var(--terminal-border);
    border-radius: 6px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4), 0 0 0 1px var(--terminal-secondary);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

@keyframes terminalGlow {
    0% { box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4), 0 0 0 1px var(--terminal-secondary); }
    100% { box-shadow: 0 12px 48px rgba(0, 0, 0, 0.5), 0 0 0 1px var(--terminal-accent); }
}

.terminal-header {
    background: var(--terminal-header-bg);
    padding: 16px 24px;
    border-bottom: 1px solid var(--terminal-secondary);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-shrink: 0;
    height: 56px;
}

.terminal-title {
    color: var(--terminal-accent);
    font-size: 16px;
    font-weight: bold;
    text-shadow: 0 0 10px var(--terminal-accent);
}

.terminal-controls {
    display: flex;
    gap: 10px;
    align-items: center;
}

.control-btn {
    cursor: pointer;
    padding: 4px 12px;
    border: 1px solid var(--terminal-border);
    border-radius: 3px;
    transition: all 0.2s;
    font-size: 14px;
}

.control-btn:hover {
    background: var(--terminal-secondary);
    color: #ffffff;
}

#admin-btn {
    color: var(--terminal-warning);
    border-color: var(--terminal-warning);
}

#admin-btn:hover {
    background: var(--terminal-warning);
    color: #0d1117;
}

.terminal-controls #username-input {
    background: rgba(33, 38, 45, 0.6);
    border: 1px solid var(--terminal-border);
    color: var(--terminal-fg);
    padding: 4px 10px;
    font-family: inherit;
    font-size: 12px;
    border-radius: 3px;
    outline: none;
    width: 150px;
}

.terminal-controls #username-input:focus {
    border-color: var(--terminal-secondary);
}

.btn-header {
    background: var(--terminal-border);
    color: var(--terminal-fg);
    border: 1px solid var(--terminal-secondary);
    padding: 4px 12px;
    font-family: inherit;
    font-size: 12px;
    cursor: pointer;
    border-radius: 3px;
    transition: all 0.2s;
}

.btn-header:hover {
    background: var(--terminal-secondary);
    color: #ffffff;
}

.terminal-body {
    display: flex;
    flex-direction: column;
    overflow: hidden;
    height: calc(90vh - 56px);
}

.terminal-scroll-area {
    overflow-y: auto;
    overflow-x: hidden;
    padding: 24px;
    height: calc(90vh - 56px - 88px);
}

.terminal-scroll-area::-webkit-scrollbar {
    width: 8px;
}

.terminal-scroll-area::-webkit-scrollbar-track {
    background: var(--terminal-border);
}

.terminal-scroll-area::-webkit-scrollbar-thumb {
    background: var(--terminal-secondary);
    border-radius: 4px;
}

.welcome-banner {
    color: var(--terminal-fg);
    margin-bottom: 24px;
    border-bottom: 1px solid var(--terminal-border);
    padding-bottom: 20px;
    animation: fadeIn 1s ease-in;
}

.welcome-banner h2 {
    color: var(--terminal-accent);
    font-size: 24px;
    margin-bottom: 12px;
    font-weight: normal;
}

.welcome-banner p {
    color: var(--terminal-fg);
    font-size: 14px;
    line-height: 1.6;
    margin-bottom: 12px;
    opacity: 0.9;
}

.welcome-banner ul {
    list-style: none;
    padding: 0;
    margin: 16px 0;
}

.welcome-banner li {
    color: var(--terminal-fg);
    font-size: 14px;
    line-height: 1.8;
    padding-left: 20px;
    position: relative;
    opacity: 0.9;
}

.welcome-banner li:before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--terminal-secondary);
}

.welcome-banner strong {
    color: var(--terminal-accent);
    font-weight: bold;
}

.welcome-banner .welcome-footer {
    color: var(--terminal-secondary);
    font-style: italic;
    margin-top: 16px;
    margin-bottom: 0;
}

.welcome-banner pre {
    font-size: 13px;
    line-height: 1.3;
    text-shadow: 0 0 8px rgba(121, 192, 255, 0.3);
}

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

.no-messages-placeholder {
    color: var(--terminal-fg);
    opacity: 0.5;
    text-align: center;
    padding: 40px 20px;
    font-size: 16px;
    font-style: italic;
}

.no-messages-placeholder.hidden {
    display: none;
}

#messages-container {
    margin-top: 20px;
    min-height: 100px;
}

.admin-controls {
    background: var(--terminal-header-bg);
    border-bottom: 1px solid var(--terminal-warning);
    padding: 12px 24px;
    display: flex;
    align-items: center;
    gap: 20px;
    flex-shrink: 0;
}

.admin-controls.hidden {
    display: none;
}

.checkbox-label {
    color: var(--terminal-fg);
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
    cursor: pointer;
    width: 18px;
    height: 18px;
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    background: var(--terminal-bg);
    border: 2px solid var(--terminal-border);
    border-radius: 3px;
    transition: all 0.2s;
    position: relative;
}

.checkbox-label input[type="checkbox"]:hover {
    border-color: var(--terminal-secondary);
    box-shadow: 0 0 5px rgba(88, 166, 255, 0.3);
}

.checkbox-label input[type="checkbox"]:checked {
    background: var(--terminal-secondary);
    border-color: var(--terminal-secondary);
}

.checkbox-label input[type="checkbox"]:checked::after {
    content: '✓';
    position: absolute;
    top: -2px;
    left: 2px;
    color: #ffffff;
    font-size: 14px;
    font-weight: bold;
}

.btn-danger {
    background: var(--terminal-error);
    color: #ffffff;
    border: none;
    padding: 6px 16px;
    font-family: inherit;
    font-size: 12px;
    cursor: pointer;
    border-radius: 3px;
    transition: all 0.2s;
    font-weight: bold;
}

.btn-danger:hover {
    background: #ff6b6b;
}

#selected-count {
    color: var(--terminal-accent);
    font-size: 13px;
    margin-left: auto;
}

.message {
    margin-bottom: 12px;
    padding: 8px;
    border-left: 2px solid var(--terminal-border);
    padding-left: 12px;
    animation: messageSlide 0.3s ease-out;
    transition: all 0.2s;
    position: relative;
}

.message.admin-mode {
    padding-left: 40px;
}

.message-checkbox {
    position: absolute;
    left: 12px;
    top: 12px;
    width: 16px;
    height: 16px;
    cursor: pointer;
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    background: var(--terminal-bg);
    border: 2px solid var(--terminal-border);
    border-radius: 3px;
    transition: all 0.2s;
}

.message-checkbox:hover {
    border-color: var(--terminal-secondary);
    box-shadow: 0 0 5px rgba(88, 166, 255, 0.3);
}

.message-checkbox:checked {
    background: var(--terminal-secondary);
    border-color: var(--terminal-secondary);
}

.message-checkbox:checked::after {
    content: '✓';
    position: absolute;
    top: -2px;
    left: 2px;
    color: #ffffff;
    font-size: 12px;
    font-weight: bold;
}

@keyframes messageSlide {
    from { opacity: 0; transform: translateX(-20px); }
    to { opacity: 1; transform: translateX(0); }
}

.message:hover {
    background: rgba(88, 166, 255, 0.05);
    border-left-color: var(--terminal-secondary);
}

.message.admin-mode {
    border-left-color: var(--terminal-warning);
}

.message-header {
    display: flex;
    gap: 10px;
    margin-bottom: 4px;
    font-size: 12px;
}

.message-user {
    color: var(--terminal-accent);
    font-weight: bold;
}

.message-user.admin-username {
    color: var(--terminal-warning);
}

.message-time {
    color: var(--terminal-secondary);
    opacity: 0.7;
}

.message-text {
    color: var(--terminal-fg);
    word-wrap: break-word;
    font-size: 15px;
    line-height: 1.5;
}

.input-section {
    flex-shrink: 0;
    background: var(--terminal-bg);
    border-top: 1px solid var(--terminal-border);
    padding: 16px 24px;
    height: 88px;
}

.admin-online-indicator {
    background: var(--terminal-bg);
    border-top: 1px solid var(--terminal-warning);
    padding: 8px 24px;
    text-align: center;
    flex-shrink: 0;
}

.admin-online-indicator.hidden {
    display: none;
}

.admin-online-indicator span {
    color: var(--terminal-warning);
    font-size: 13px;
    font-weight: bold;
    animation: adminPulse 4s ease-in-out infinite;
}

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

#chat-form {
    display: flex;
    gap: 12px;
    align-items: center;
}

.input-wrapper {
    flex: 1;
    display: flex;
    align-items: center;
    gap: 8px;
    background: rgba(33, 38, 45, 0.6);
    border: 1px solid var(--terminal-border);
    border-radius: 4px;
    padding: 12px 16px;
    transition: all 0.2s;
}

.input-wrapper:focus-within {
    border-color: var(--terminal-secondary);
    box-shadow: 0 0 0 2px rgba(88, 166, 255, 0.15);
    background: rgba(33, 38, 45, 0.8);
}

.prompt {
    color: var(--terminal-accent);
    font-weight: bold;
}

.prompt-symbol {
    color: var(--terminal-secondary);
    margin-right: 8px;
}

#message-input {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--terminal-fg);
    padding: 0;
    font-family: inherit;
    font-size: 15px;
    outline: none;
}

#message-input::placeholder {
    color: rgba(201, 209, 217, 0.4);
}

.btn-send {
    background: var(--terminal-secondary);
    color: #ffffff;
    border: none;
    padding: 12px 24px;
    font-family: inherit;
    font-weight: bold;
    font-size: 14px;
    cursor: pointer;
    border-radius: 4px;
    transition: all 0.2s;
}

.btn-send:hover {
    background: var(--terminal-hover);
    box-shadow: 0 4px 12px rgba(88, 166, 255, 0.3);
}

.btn-small {
    background: var(--terminal-border);
    color: var(--terminal-fg);
    border: 1px solid var(--terminal-secondary);
    padding: 6px 12px;
    font-family: inherit;
    font-size: 12px;
    cursor: pointer;
    border-radius: 3px;
    transition: all 0.2s;
}

.btn-small:hover {
    background: var(--terminal-secondary);
    color: #ffffff;
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 1);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal.hidden {
    display: none;
}

.modal-content {
    background: var(--terminal-bg);
    border: 1px solid var(--terminal-warning);
    border-radius: 6px;
    width: 90%;
    max-width: 400px;
    box-shadow: 0 12px 48px rgba(0, 0, 0, 0.6);
}

.welcome-modal-content {
    max-width: 600px;
    border-color: var(--terminal-secondary);
}

.welcome-modal-content .modal-header {
    border-color: var(--terminal-secondary);
    color: var(--terminal-accent);
}

.welcome-modal-content .welcome-banner {
    border: none;
    margin-bottom: 20px;
}

#welcome-start-btn {
    width: 100%;
    margin-top: 10px;
}

.modal-header {
    background: var(--terminal-header-bg);
    padding: 12px 20px;
    border-bottom: 1px solid var(--terminal-warning);
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--terminal-warning);
    font-weight: bold;
}

.modal-close {
    cursor: pointer;
    font-size: 24px;
}

.modal-body {
    padding: 20px;
}

.admin-section input {
    width: 100%;
    background: rgba(33, 38, 45, 0.6);
    border: 1px solid var(--terminal-border);
    color: var(--terminal-fg);
    padding: 10px;
    font-family: inherit;
    margin-bottom: 10px;
    border-radius: 4px;
}

.admin-section button {
    width: 100%;
    background: var(--terminal-warning);
    color: #0d1117;
    border: none;
    padding: 10px;
    font-family: inherit;
    font-weight: bold;
    cursor: pointer;
    border-radius: 4px;
    transition: all 0.2s;
}

.admin-section button:hover {
    background: #e5a328;
    box-shadow: 0 4px 12px rgba(210, 153, 34, 0.3);
}

.admin-note {
    margin-top: 15px;
    padding: 10px;
    background: rgba(255, 170, 0, 0.1);
    border: 1px solid var(--terminal-warning);
    border-radius: 4px;
    font-size: 12px;
}

.admin-divider {
    border: none;
    border-top: 1px solid var(--terminal-border);
    margin: 20px 0;
}

.admin-subtitle {
    color: var(--terminal-accent);
    font-size: 14px;
    margin-bottom: 15px;
    font-weight: bold;
}

#admin-list {
    max-height: 200px;
    overflow-y: auto;
    margin-bottom: 15px;
    border: 1px solid var(--terminal-border);
    border-radius: 4px;
    padding: 10px;
}

#admin-list:empty {
    display: none;
}

.admin-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px;
    margin-bottom: 8px;
    background: rgba(33, 38, 45, 0.6);
    border-radius: 3px;
    border-left: 2px solid var(--terminal-secondary);
}

.admin-item:last-child {
    margin-bottom: 0;
}

.admin-info {
    color: var(--terminal-accent);
    font-size: 13px;
}

.super-admin-badge {
    display: inline-block;
    background: var(--terminal-purple);
    color: #ffffff;
    padding: 2px 6px;
    font-size: 10px;
    border-radius: 3px;
    font-weight: bold;
    margin-left: 8px;
    vertical-align: middle;
}

.btn-delete-admin {
    background: var(--terminal-error);
    color: #ffffff;
    border: none;
    padding: 4px 10px;
    font-family: inherit;
    font-size: 11px;
    cursor: pointer;
    border-radius: 3px;
    transition: all 0.2s;
}

.btn-delete-admin:hover {
    background: #ff6b6b;
}

.add-admin-form {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.add-admin-form input {
    margin-bottom: 0;
}

.add-admin-form button {
    background: var(--terminal-secondary);
    color: #ffffff;
}

.add-admin-form button:hover {
    background: var(--terminal-hover);
}

#chat-screen {
    width: 100%;
    max-width: 1400px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Setup Screen */
#setup-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--terminal-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    padding: 20px;
}

#setup-screen.hidden {
    display: none;
}

#setup-output {
    color: var(--terminal-accent);
    margin-bottom: 20px;
    font-size: 13px;
}

.input-group {
    margin-bottom: 15px;
    display: flex;
    flex-direction: column;
}

.input-group label {
    color: var(--terminal-secondary);
    margin-bottom: 5px;
    font-size: 13px;
}

.input-group input {
    background: rgba(33, 38, 45, 0.6);
    border: 1px solid var(--terminal-border);
    color: var(--terminal-fg);
    padding: 10px;
    font-family: inherit;
    border-radius: 4px;
    outline: none;
}

.input-group input:focus {
    border-color: var(--terminal-secondary);
    box-shadow: 0 0 0 2px rgba(88, 166, 255, 0.15);
}

.btn-primary {
    width: 100%;
    background: var(--terminal-secondary);
    color: #ffffff;
    border: none;
    padding: 12px;
    font-family: inherit;
    font-weight: bold;
    cursor: pointer;
    border-radius: 4px;
    margin-top: 10px;
    transition: all 0.2s;
}

.btn-primary:hover {
    background: var(--terminal-hover);
    box-shadow: 0 4px 12px rgba(88, 166, 255, 0.3);
}

.btn-secondary {
    width: 100%;
    background: var(--terminal-purple);
    color: #ffffff;
    border: none;
    padding: 12px;
    font-family: inherit;
    font-weight: bold;
    cursor: pointer;
    border-radius: 4px;
    margin-top: 10px;
    transition: all 0.2s;
}

.btn-secondary:hover {
    background: #a375ff;
    box-shadow: 0 4px 12px rgba(188, 140, 255, 0.3);
}

.room-buttons {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-top: 10px;
}

.room-info {
    color: var(--terminal-accent);
    font-size: 12px;
    margin-top: 10px;
    word-break: break-all;
}

.hidden {
    display: none !important;
}

/* System messages */
.system-message {
    color: var(--terminal-warning);
    font-style: italic;
    padding: 8px;
    margin-bottom: 10px;
    border-left: 2px solid var(--terminal-warning);
    padding-left: 12px;
}

/* Responsive */
@media (max-width: 768px) {
    body {
        padding: 0;
        align-items: stretch;
        min-height: 100vh;
        height: 100vh;
    }
    
    .terminal-window {
        height: 100vh;
        min-height: 100vh;
        max-height: 100vh;
        max-width: 100%;
        min-width: 0;
        border-radius: 0;
        border: none;
        width: 100vw;
    }
    
    .input-section {
        position: absolute;
        bottom: 0;
        left: 0;
        right: 0;
        z-index: 100;
        background: var(--terminal-bg);
        width: 100%;
        box-shadow: 0 -4px 12px rgba(0, 0, 0, 0.3);
    }
    
    .terminal-body {
        position: relative;
        height: 100%;
        flex: 1;
        overflow: hidden;
    }
    
    .terminal-header {
        padding: 12px 16px;
        flex-wrap: wrap;
        gap: 10px;
        height: auto;
        border-bottom: 1px solid var(--terminal-secondary);
        flex-shrink: 0;
    }
    
    .terminal-title {
        font-size: 14px;
        width: 100%;
    }
    
    .terminal-scroll-area {
        height: 100%;
        flex: 1;
        min-height: 0;
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        display: flex;
        flex-direction: column;
    }
    
    .terminal-controls {
        width: 100%;
        justify-content: flex-start;
    }
    
    .terminal-controls #username-input {
        flex: 1;
        min-width: 0;
    }
    
    .terminal-scroll-area {
        padding: 16px;
        padding-bottom: 100px;
        overflow-y: scroll;
        -webkit-overflow-scrolling: touch;
    }
    
    #messages-container {
        display: flex;
        flex-direction: column;
        justify-content: flex-end;
        min-height: 100%;
    }
    
    .no-messages-placeholder {
        margin-top: 0;
        margin-bottom: auto;
    }
    
    .welcome-banner h2 {
        font-size: 20px;
    }
    
    .welcome-banner p,
    .welcome-banner li {
        font-size: 13px;
    }
    
    .input-section {
        padding: 12px 16px;
    }
    
    #chat-form {
        gap: 8px;
    }
    
    .input-wrapper {
        padding: 10px 12px;
        flex: 1;
        min-width: 0;
    }
    
    .prompt,
    .prompt-symbol {
        display: none;
    }
    
    #message-input {
        font-size: 14px;
    }
    
    .btn-send {
        padding: 10px 14px;
        font-size: 13px;
        flex-shrink: 0;
        white-space: nowrap;
    }
    
    .message-text {
        font-size: 14px;
    }
}

@media (max-width: 480px) {
    .terminal-header {
        padding: 10px 12px;
    }
    
    .terminal-title {
        font-size: 12px;
    }
    
    .control-btn,
    .btn-header {
        padding: 4px 8px;
        font-size: 11px;
    }
    
    .terminal-controls #username-input {
        font-size: 11px;
        padding: 4px 8px;
    }
    
    .welcome-banner h2 {
        font-size: 18px;
    }
    
    .welcome-banner p,
    .welcome-banner li {
        font-size: 12px;
    }
    
    #chat-form {
        gap: 6px;
    }
    
    .btn-send {
        padding: 10px 12px;
        font-size: 12px;
        flex-shrink: 0;
    }
}