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

:root {
    --bg-primary: #0a0e14;
    --bg-secondary: #0d1117;
    --bg-tertiary: #161b22;
    --green-primary: #00ff41;
    --green-secondary: #00cc33;
    --green-dim: #1a4d2e;
    --text-primary: #c9d1d9;
    --text-secondary: #8b949e;
    --border-color: #1a3a1a;
    --shadow-color: rgba(0, 255, 65, 0.1);
}

body {
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    height: 100vh;
    height: 100dvh; /* Dynamic viewport height for mobile browsers */
    overflow: hidden;
    /* Support for safe areas on notched devices */
    padding: env(safe-area-inset-top, 0) env(safe-area-inset-right, 0) env(safe-area-inset-bottom, 0) env(safe-area-inset-left, 0);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    /* Prevent pull-to-refresh on mobile */
    overscroll-behavior-y: contain;
    /* Improve touch responsiveness */
    touch-action: manipulation;
    /* Prevent text selection highlighting on touch */
    -webkit-tap-highlight-color: rgba(0, 255, 65, 0.1);
}

.container {
    display: flex;
    flex-direction: column;
    height: 100vh;
    height: 100dvh; /* Dynamic viewport height for mobile browsers */
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
}

/* Header Styles */
.header {
    background-color: var(--bg-secondary);
    border-bottom: 2px solid var(--green-primary);
    padding: 15px 20px;
    box-shadow: 0 2px 10px var(--shadow-color);
}

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

.terminal-title {
    font-size: 18px;
    font-weight: bold;
    color: var(--green-primary);
    letter-spacing: 2px;
    text-shadow: 0 0 10px var(--shadow-color);
}

.header-right {
    display: flex;
    align-items: center;
    gap: 15px;
}

.terminal-status {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    color: var(--green-secondary);
}

.feedback-link {
    font-size: 12px;
    color: var(--green-secondary);
    text-decoration: none;
    padding: 6px 12px;
    border: 1px solid var(--green-dim);
    border-radius: 4px;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 5px;
    /* Touch-friendly */
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
    user-select: none;
    -webkit-user-select: none;
}

.feedback-link:hover {
    color: var(--green-primary);
    border-color: var(--green-primary);
    background-color: rgba(0, 255, 65, 0.1);
    box-shadow: 0 0 10px var(--shadow-color);
}

.feedback-link:active {
    transform: scale(0.98);
}

.status-indicator {
    width: 8px;
    height: 8px;
    background-color: var(--green-primary);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

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

/* Chat Container */
.chat-container {
    flex: 1;
    overflow-y: auto;
    padding: 30px 20px;
    background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    scroll-behavior: smooth;
    /* Mobile scrolling optimization */
    -webkit-overflow-scrolling: touch;
    overscroll-behavior-y: contain;
    /* Improve rendering performance */
    will-change: scroll-position;
}

.chat-container::-webkit-scrollbar {
    width: 8px;
}

.chat-container::-webkit-scrollbar-track {
    background: var(--bg-tertiary);
}

.chat-container::-webkit-scrollbar-thumb {
    background: var(--green-dim);
    border-radius: 4px;
}

.chat-container::-webkit-scrollbar-thumb:hover {
    background: var(--green-secondary);
}

/* Welcome Message */
.welcome-message {
    text-align: center;
    margin-top: 50px;
    opacity: 0.8;
}

.ascii-art {
    color: var(--green-primary);
    font-size: clamp(7px, 2.5vw, 12px);
    line-height: 1.2;
    margin-bottom: 20px;
    text-shadow: 0 0 10px var(--shadow-color);
}

.welcome-text {
    color: var(--text-secondary);
    font-size: 14px;
}

.welcome-text-small {
    color: var(--text-secondary);
    font-size: 11px;
    opacity: 0.7;
    margin-top: 10px;
}

/* System Banner */
.system-banner {
    margin: 20px auto;
    max-width: 700px;
    width: 100%;
    border-collapse: collapse;
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    font-size: clamp(12px, 2.5vw, 14px);
    border: 1px solid #00ff41;
    background-color: #0a0e14;
    box-shadow: 
        0 0 10px rgba(0, 255, 65, 0.3),
        inset 0 0 20px rgba(0, 255, 65, 0.05);
    border-radius: 0;
    position: relative;
}

.system-banner::before {
    content: '';
    position: absolute;
    top: -1px;
    left: -1px;
    right: -1px;
    bottom: -1px;
    background: linear-gradient(45deg, #00ff41, #00cc33, #00ff41);
    border-radius: 0;
    z-index: -1;
    opacity: 0.3;
}

.system-banner thead th {
    background-color: var(--green-dim);
    color: var(--green-primary);
    padding: 10px;
    text-align: center;
    font-weight: bold;
    letter-spacing: 2px;
    border-bottom: 2px solid var(--green-secondary);
    text-shadow: 0 0 5px rgba(0, 255, 65, 0.3);
}

.system-banner tbody td {
    padding: 8px 15px;
    color: #00ff41;
    border: 0.5px solid #00cc33;
    text-shadow: 0 0 5px rgba(0, 255, 65, 0.4);
    text-align: left;
    background-color: rgba(0, 0, 0, 0.2);
    position: relative;
}

.system-banner tbody td::before {
    content: '> ';
    color: #00ff41;
    font-weight: bold;
    opacity: 0.7;
}

.system-banner tbody td.label {
    font-weight: bold;
    color: var(--green-primary);
    white-space: nowrap;
    width: 40%;
    text-align: right;
    padding-right: 10px;
}

.system-banner tbody tr.divider td {
    padding: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--green-secondary), transparent);
    border: none;
}

/* Session Info Table - Different styling */
.system-banner.session-info {
    border: 2px solid #00ff41;
    background-color: #0a0e14;
    box-shadow: 
        0 0 20px rgba(0, 255, 65, 0.4),
        inset 0 0 30px rgba(0, 255, 65, 0.08);
    margin-bottom: 15px;
}

.system-banner.session-info::before {
    background: linear-gradient(45deg, #00ff41, #00ff88, #00ff41);
    opacity: 0.5;
}

.system-banner.session-info tbody td {
    color: #00ff88;
    font-weight: bold;
    background-color: rgba(0, 0, 0, 0.3);
    border: 0.5px solid #00ff41;
    text-shadow: 0 0 8px rgba(0, 255, 136, 0.6);
}

.system-banner.session-info tbody td::before {
    content: '$ ';
    color: #00ff88;
    font-weight: bold;
    opacity: 0.8;
}

.access-granted {
    color: var(--green-primary);
    font-size: clamp(12px, 3vw, 16px);
    font-weight: bold;
    text-align: center;
    margin: 15px 0;
    letter-spacing: 2px;
    text-shadow: 0 0 10px var(--shadow-color);
}

/* Message Styles */
.message {
    margin-bottom: 25px;
    animation: fadeIn 0.3s ease-in;
}

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

.message-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 8px;
}

.message-role {
    font-size: 13px;
    font-weight: bold;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.message.user .message-role {
    color: var(--green-primary);
}

.message.assistant .message-role {
    color: var(--green-secondary);
}

.message-time {
    font-size: 11px;
    color: var(--text-secondary);
}

.message-content {
    padding: 15px 20px;
    border-radius: 8px;
    line-height: 1.6;
    font-size: 14px;
    position: relative;
    border-left: 3px solid;
}

.message.user .message-content {
    background-color: var(--bg-tertiary);
    border-left-color: var(--green-primary);
    margin-left: 20px;
}

.message.assistant .message-content {
    background-color: var(--bg-secondary);
    border-left-color: var(--green-secondary);
    margin-left: 20px;
}

/* Loading Spinner */
.loading-spinner {
    display: inline-flex;
    gap: 5px;
    padding: 15px 20px;
}

.spinner-dot {
    width: 8px;
    height: 8px;
    background-color: var(--green-primary);
    border-radius: 50%;
    animation: bounce 1.4s infinite ease-in-out both;
}

.spinner-dot:nth-child(1) {
    animation-delay: -0.32s;
}

.spinner-dot:nth-child(2) {
    animation-delay: -0.16s;
}

@keyframes bounce {
    0%, 80%, 100% {
        transform: scale(0);
        opacity: 0.5;
    }
    40% {
        transform: scale(1);
        opacity: 1;
    }
}

/* Cursor Animation for Streaming */
.typing-cursor {
    display: inline-block;
    width: 8px;
    height: 16px;
    background-color: var(--green-primary);
    margin-left: 2px;
    animation: blink 1s infinite;
}

@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

/* Input Container */
.input-container {
    background-color: var(--bg-secondary);
    border-top: 2px solid var(--green-primary);
    padding: 20px;
    box-shadow: 0 -2px 10px var(--shadow-color);
}

.chat-form {
    width: 100%;
}

.input-wrapper {
    display: flex;
    align-items: center;
    gap: 10px;
    background-color: var(--bg-tertiary);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    padding: 12px 15px;
    transition: border-color 0.3s ease;
}

.input-wrapper:focus-within {
    border-color: var(--green-primary);
    box-shadow: 0 0 15px var(--shadow-color);
}

.prompt-symbol {
    color: var(--green-primary);
    font-weight: bold;
    font-size: 18px;
}

.user-input {
    flex: 1;
    background: transparent;
    border: none;
    outline: none;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 15px;
    padding: 5px;
    /* Mobile keyboard optimization */
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
}

.user-input::placeholder {
    color: var(--text-secondary);
    opacity: 0.8;
}

.submit-btn {
    background: linear-gradient(135deg, var(--green-primary), var(--green-secondary));
    border: none;
    border-radius: 6px;
    width: 40px;
    height: 40px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    color: var(--bg-primary);
    /* Touch-friendly */
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
    user-select: none;
    -webkit-user-select: none;
}

.submit-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 0 20px var(--shadow-color);
}

.submit-btn:active {
    transform: scale(0.95);
}

.submit-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

/* Responsive Design */

/* Tablets and smaller laptops */
@media (max-width: 1024px) {
    .container {
        max-width: 100%;
    }
    
    .chat-container {
        padding: 25px 20px;
    }
}

/* Mobile devices (landscape and portrait tablets) */
@media (max-width: 768px) {
    body {
        font-size: 14px;
    }
    
    .container {
        max-width: 100%;
        width: 100%;
    }
    
    /* Smaller, more compact header */
    .header {
        padding: 12px 16px;
    }
    
    .terminal-header {
        flex-wrap: nowrap;
        gap: 10px;
    }
    
    .terminal-title {
        font-size: 14px;
        letter-spacing: 1px;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
        flex-shrink: 1;
    }
    
    .header-right {
        gap: 10px;
        flex-shrink: 0;
    }
    
    .feedback-link {
        font-size: 11px;
        padding: 6px 12px;
        min-height: 36px;
        white-space: nowrap;
    }
    
    .terminal-status {
        font-size: 11px;
    }
    
    .status-indicator {
        width: 7px;
        height: 7px;
    }
    
    /* Chat container adjustments */
    .chat-container {
        padding: 20px 16px;
    }
    
    /* Welcome message */
    .welcome-message {
        margin-top: 20px;
    }
    
    .ascii-art {
        font-size: clamp(7px, 2.2vw, 11px);
    }
    
    /* System banner - responsive with clamp() */
    .system-banner {
        margin: 15px auto;
        max-width: 100%;
        font-size: clamp(11px, 2.5vw, 13px);
    }
    
    .system-banner thead th {
        padding: 8px;
        font-size: clamp(11px, 2.5vw, 13px);
    }
    
    .system-banner tbody td {
        padding: 6px 10px;
        font-size: clamp(11px, 2.5vw, 13px);
    }
    
    .system-banner tbody td.label {
        width: 35%;
        padding-right: 8px;
    }
    
    .welcome-text {
        font-size: 13px;
        padding: 0 10px;
    }
    
    .welcome-text-small {
        font-size: 11px;
        padding: 0 10px;
    }
    
    /* Message styles */
    .message {
        margin-bottom: 20px;
    }
    
    .message-header {
        gap: 8px;
        margin-bottom: 6px;
    }
    
    .message-role {
        font-size: 12px;
    }
    
    .message-time {
        font-size: 11px;
    }
    
    .message-content {
        padding: 12px 14px;
        font-size: 14px;
        margin-left: 10px;
        line-height: 1.5;
    }
    
    /* Input container - touch-friendly */
    .input-container {
        padding: 14px 16px;
    }
    
    .input-wrapper {
        padding: 10px 14px;
    }
    
    .prompt-symbol {
        font-size: 18px;
    }
    
    .user-input {
        font-size: 16px; /* Prevent iOS zoom */
        padding: 4px;
    }
    
    .submit-btn {
        width: 44px;
        height: 44px;
        flex-shrink: 0;
    }
    
    .submit-btn svg {
        width: 20px;
        height: 20px;
    }
}

/* Mobile devices (portrait and small screens) */
@media (max-width: 480px) {
    /* Compact header for small screens */
    .header {
        padding: 10px 12px;
    }
    
    .terminal-header {
        gap: 8px;
    }
    
    .terminal-title {
        font-size: 12px;
        letter-spacing: 0.5px;
        max-width: 150px;
    }
    
    .header-right {
        gap: 8px;
    }
    
    .feedback-link {
        font-size: 10px;
        padding: 5px 10px;
        min-height: 32px;
        min-width: 70px;
    }
    
    .terminal-status {
        font-size: 10px;
    }
    
    .status-indicator {
        width: 6px;
        height: 6px;
    }
    
    /* Chat container adjustments */
    .chat-container {
        padding: 16px 12px;
    }
    
    /* Welcome message */
    .welcome-message {
        margin-top: 15px;
    }
    
    .ascii-art {
        font-size: clamp(6px, 2vw, 10px);
        margin-bottom: 15px;
    }
    
    .access-granted {
        font-size: clamp(11px, 2.5vw, 14px);
        margin: 12px 0;
    }
    
    /* System banner */
    .system-banner {
        margin: 12px auto;
        font-size: clamp(10px, 2vw, 12px);
    }
    
    .system-banner thead th {
        padding: 6px;
        font-size: clamp(10px, 2vw, 12px);
        letter-spacing: 1px;
    }
    
    .system-banner tbody td {
        padding: 5px 8px;
        font-size: clamp(10px, 2vw, 12px);
    }
    
    .system-banner tbody td.label {
        width: 38%;
        padding-right: 6px;
    }
    
    .welcome-text {
        font-size: 12px;
        padding: 0 8px;
        line-height: 1.5;
    }
    
    .welcome-text-small {
        font-size: 10px;
        padding: 0 8px;
    }
    
    /* Message styles */
    .message {
        margin-bottom: 18px;
    }
    
    .message-header {
        gap: 6px;
        margin-bottom: 5px;
    }
    
    .message-role {
        font-size: 11px;
    }
    
    .message-time {
        font-size: 10px;
    }
    
    .message-content {
        padding: 10px 12px;
        font-size: 13px;
        margin-left: 8px;
        line-height: 1.5;
        border-radius: 6px;
    }
    
    /* Input container */
    .input-container {
        padding: 12px;
    }
    
    .input-wrapper {
        padding: 8px 12px;
        gap: 8px;
    }
    
    .prompt-symbol {
        font-size: 16px;
    }
    
    .user-input {
        font-size: 16px; /* Prevent iOS zoom */
        padding: 3px;
    }
    
    .submit-btn {
        width: 44px;
        height: 44px;
    }
    
    .submit-btn svg {
        width: 18px;
        height: 18px;
    }
}

/* Extra small devices */
@media (max-width: 360px) {
    .terminal-title {
        font-size: 11px;
        max-width: 120px;
    }
    
    .feedback-link {
        font-size: 9px;
        padding: 4px 8px;
        min-width: 60px;
    }
    
    .terminal-status {
        font-size: 9px;
    }
    
    .chat-container {
        padding: 12px 10px;
    }
    
    .message-content {
        padding: 8px 10px;
        font-size: 12px;
        margin-left: 5px;
    }
    
    .input-container {
        padding: 10px;
    }
    
    .input-wrapper {
        padding: 6px 10px;
    }
}

/* Landscape orientation for mobile devices */
@media (max-height: 500px) and (orientation: landscape) {
    .header {
        padding: 8px 15px;
    }
    
    .terminal-title {
        font-size: 12px;
    }
    
    .feedback-link {
        font-size: 10px;
        padding: 4px 10px;
        min-height: 28px;
    }
    
    .terminal-status {
        font-size: 10px;
    }
    
    .chat-container {
        padding: 12px 15px;
    }
    
    .welcome-message {
        margin-top: 10px;
    }
    
    .ascii-art {
        font-size: 9px;
        margin-bottom: 10px;
    }
    
    .system-banner {
        margin: 10px auto;
        font-size: 11px;
    }
    
    .system-banner thead th {
        padding: 5px;
        font-size: 11px;
        letter-spacing: 1px;
    }
    
    .system-banner tbody td {
        padding: 4px 8px;
        font-size: 11px;
    }
    
    .system-banner tbody td.label {
        padding-right: 6px;
    }
    
    .access-granted {
        font-size: 12px;
        margin: 8px 0;
    }
    
    .welcome-text {
        font-size: 11px;
    }
    
    .welcome-text-small {
        font-size: 9px;
    }
    
    .input-container {
        padding: 8px 15px;
    }
    
    .input-wrapper {
        padding: 6px 12px;
    }
    
    .submit-btn {
        width: 36px;
        height: 36px;
    }
    
    .submit-btn svg {
        width: 16px;
        height: 16px;
    }
}

/* Error Message */
.error-message {
    background-color: rgba(255, 0, 0, 0.1);
    border-left-color: #ff0000 !important;
    color: #ff6b6b;
}

/* Hover support detection - Only apply hover effects on devices that support hover */
@media (hover: hover) and (pointer: fine) {
    .submit-btn:hover {
        transform: scale(1.05);
        box-shadow: 0 0 20px var(--shadow-color);
    }
    
    .feedback-link:hover {
        color: var(--green-primary);
        border-color: var(--green-primary);
        background-color: rgba(0, 255, 65, 0.1);
        box-shadow: 0 0 10px var(--shadow-color);
    }
}

/* For touch devices, use active states instead of hover */
@media (hover: none) and (pointer: coarse) {
    .submit-btn:active {
        transform: scale(0.95);
        box-shadow: 0 0 15px var(--shadow-color);
    }
    
    .feedback-link:active {
        transform: scale(0.98);
        background-color: rgba(0, 255, 65, 0.08);
    }
}