/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    height: 100%;
    overflow: hidden;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: white;
    color: black;
    line-height: 1.6;
    height: 100%;
    overflow: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Container */
.container {
    width: 100%;
    max-width: 100%;
    margin: 0;
    height: 100vh;
    height: 100dvh;
    /* Dynamic viewport height for mobile */
    display: flex;
    flex-direction: column;
    background-color: white;
    position: relative;
}

/* Desktop styles */
@media (min-width: 769px) {
    .container {
        max-width: 800px;
        margin: 0 auto;
        box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);
        height: 100vh;
    }
}

/* Header */
.header {
    background-color: black;
    color: white;
    padding: 0.75rem 1rem;
    text-align: left;
    border-bottom: 2px solid black;
    flex-shrink: 0;
    position: relative;
    z-index: 10;
    min-height: 50px; /* Ensure consistent height */
}

/* Removed hamburger menu and mobile navigation drawer - not needed */

.header-content {
    max-width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem;
    height: 100%;
    white-space: nowrap;
}

/* Header title */
.header-title {
    flex: 0 0 auto;
    text-align: left;
}

.header-title h1 {
    font-size: 1.25rem;
    margin: 0;
    font-weight: 600;
}

/* Header navigation */
.header-nav {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    flex-shrink: 0;
}

/* Mobile/Desktop visibility helpers */
.desktop-only {
    display: inline;
}

.mobile-only {
    display: none;
}

@media (max-width: 768px) {
    .desktop-only {
        display: none;
    }
    
    .mobile-only {
        display: inline;
    }
}

/* Desktop header styles */
@media (min-width: 769px) {
    .header {
        padding: 1rem 2rem;
    }

    .header-title h1 {
        font-size: 2rem;
    }
}

/* Main content area from base template */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    min-height: 0;
}

/* Chat container */
.chat-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    min-height: 0;
    /* Important for flex child to shrink */
}

/* Chat messages */
.chat-messages {
    flex: 1;
    padding: 0.75rem;
    overflow-y: auto;
    background-color: white;
    -webkit-overflow-scrolling: touch;
    /* Smooth scrolling on iOS */
    overscroll-behavior: contain;
}

.message {
    margin-bottom: 0.75rem;
    display: flex;
    align-items: flex-start;
}

.message.user {
    justify-content: flex-end;
}

.message.assistant {
    justify-content: flex-start;
}

.message-content {
    max-width: 85%;
    padding: 0.75rem 1rem;
    border-radius: 1.5rem;
    word-wrap: break-word;
    word-break: break-word;
    line-height: 1.4;
    font-size: 0.9rem;
}

.message.user .message-content {
    background-color: black;
    color: white;
    border-bottom-right-radius: 0.5rem;
}

.message.assistant .message-content {
    background-color: white;
    color: black;
    border: 2px solid black;
    border-bottom-left-radius: 0.5rem;
}

/* Animations removed for minimal design */

/* Desktop message styles */
@media (min-width: 769px) {
    .chat-messages {
        padding: 1rem 2rem;
    }

    .message {
        margin-bottom: 1rem;
    }

    .message-content {
        max-width: 70%;
        padding: 0.75rem 1rem;
        font-size: 1rem;
    }
}

/* Chat input */
.chat-input-container {
    padding: 0.75rem;
    background-color: white;
    border-top: 2px solid black;
    flex-shrink: 0;
    position: relative;
    z-index: 10;
    /* Handle safe area for devices with notches */
    padding-bottom: calc(0.75rem + env(safe-area-inset-bottom));
}

.chat-form {
    width: 100%;
}

.input-group {
    display: flex;
    gap: 0.5rem;
    align-items: flex-end;
}

#messageInput {
    flex: 1;
    padding: 0.75rem 1rem;
    border: 2px solid black;
    border-radius: 1.5rem;
    font-size: 1rem;
    outline: none;
    background-color: white;
    color: black;
    resize: none;
    min-height: 48px;
    /* Minimum touch target size */
    max-height: 120px;
    line-height: 1.4;
    font-family: inherit;
    -webkit-appearance: none;
    appearance: none;
    overflow-y: auto;
    vertical-align: top;
    /* Prevent iOS zoom */
    -webkit-text-size-adjust: 100%;
    /* Smooth scrolling */
    -webkit-overflow-scrolling: touch;
}

#messageInput:focus {
    border-color: black;
}

#sendButton {
    padding: 0.75rem 1.25rem;
    background-color: black;
    color: white;
    border: 2px solid black;
    border-radius: 2rem;
    font-size: 0.9rem;
    cursor: pointer;
    white-space: nowrap;
    min-height: 48px;
    /* Minimum touch target size */
    min-width: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    -webkit-tap-highlight-color: transparent;
}

#sendButton:hover {
    background-color: white;
    color: black;
}


#sendButton:disabled {
    background-color: white;
    color: black;
    border: 1px solid black;
    opacity: 0.5;
    cursor: not-allowed;
}

/* Desktop input styles */
@media (min-width: 769px) {
    .chat-input-container {
        padding: 1rem 2rem;
        padding-bottom: 1rem;
    }

    #messageInput {
        border-radius: 1.5rem;
    }

    #sendButton {
        padding: 0.75rem 1.5rem;
        border-radius: 1.5rem;
        font-size: 1rem;
    }
}

/* Anonymous info banner */
.anonymous-info-banner {
    background-color: rgb(245, 245, 245);
    color: rgb(100, 100, 100);
    padding: 0.75rem 1rem;
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    font-size: 0.9rem;
    border-bottom: 1px solid rgb(220, 220, 220);
}

.anonymous-info-banner .info-icon {
    font-size: 1.1rem;
    color: rgb(120, 120, 120);
    margin-top: 0.125rem;
}

.anonymous-info-banner .info-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.anonymous-info-banner .info-text {
    line-height: 1.5;
}

.anonymous-info-banner strong {
    color: rgb(80, 80, 80);
    font-weight: 600;
}

.anonymous-info-banner .banner-link {
    color: black;
    text-decoration: underline;
    font-weight: 500;
}

.anonymous-info-banner .banner-link:hover {
    text-decoration: none;
}

.anonymous-info-banner .message-counter {
    background-color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    border: 1px solid rgb(200, 200, 200);
    font-size: 0.85rem;
    white-space: nowrap;
    width: fit-content;
}

.anonymous-info-banner #messagesUsed {
    font-weight: 600;
    color: black;
}

/* Mobile adjustments for info banner */
@media (max-width: 768px) {
    .anonymous-info-banner {
        font-size: 0.85rem;
        padding: 0.5rem 0.75rem;
        flex-direction: column;
        gap: 0.25rem;
    }
    
    /* Hide full description and icon on mobile */
    .anonymous-info-banner .info-icon,
    .anonymous-info-banner .info-text {
        display: none;
    }
    
    /* Show minimal content on mobile */
    .anonymous-info-banner .info-content {
        flex-direction: row;
        align-items: center;
        justify-content: space-between;
        gap: 0.5rem;
    }
    
    /* Add minimal login text for mobile */
    .anonymous-info-banner .info-content::before {
        content: "Login for higher limits";
        font-size: 0.85rem;
        color: rgb(100, 100, 100);
        flex: 1;
    }
    
    .anonymous-info-banner .message-counter {
        font-size: 0.8rem;
        flex-shrink: 0;
    }
}

/* Loading indicator */
.loading-indicator {
    position: fixed;
    bottom: calc(1rem + env(safe-area-inset-bottom));
    left: 50%;
    transform: translateX(-50%);
    background-color: black;
    color: white;
    border: 2px solid black;
    border-radius: 2rem;
    padding: 0.75rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    font-size: 0.9rem;
}

/* Spinner removed - using text instead */

/* Spin animation removed for minimal design */

/* Desktop loading indicator */
@media (min-width: 769px) {
    .loading-indicator {
        bottom: 2rem;
        padding: 0.75rem 1.5rem;
        font-size: 1rem;
    }
}

/* Error message */
.error-message {
    background-color: white;
    color: black;
    padding: 0.75rem 1rem;
    border-radius: 1rem;
    border: 2px solid black;
    margin-bottom: 0.75rem;
    font-size: 0.9rem;
}

/* Success message */
.success-message {
    background-color: white;
    color: black;
    padding: 0.75rem 1rem;
    border-radius: 1rem;
    border: 2px solid black;
    margin-bottom: 0.75rem;
    font-size: 0.9rem;
    text-align: center;
}

/* Clear chat button (inline with input) */
.clear-chat-button {
    background-color: white;
    color: black;
    border: 2px solid black;
    border-radius: 50%;
    width: 48px;
    height: 48px;
    font-size: 1.2rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: inherit;
    -webkit-tap-highlight-color: transparent;
    transition: all 0.2s ease;
    flex-shrink: 0;
    font-weight: bold;
    line-height: 1;
}

.clear-chat-button:hover {
    background-color: black;
    color: white;
}

.clear-chat-button:active {
    transform: scale(0.95);
}

/* History loading */
.history-loading {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 2rem 1rem;
    color: black;
    font-size: 0.9rem;
}

.loading-text {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* Loading spinner removed */

/* History error */
.history-error {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 1rem;
    margin-bottom: 0.75rem;
}

.error-text {
    background-color: white;
    color: black;
    padding: 0.75rem 1rem;
    border-radius: 1rem;
    border: 2px solid black;
    font-size: 0.9rem;
    text-align: center;
}

/* Desktop error message */
@media (min-width: 769px) {
    .error-message {
        border-radius: 0.5rem;
        margin-bottom: 1rem;
        font-size: 1rem;
    }

    .success-message {
        border-radius: 0.5rem;
        margin-bottom: 1rem;
        font-size: 1rem;
    }

    .clear-chat-button {
        width: 44px;
        height: 44px;
        font-size: 1.1rem;
    }

    .history-loading {
        padding: 3rem 2rem;
        font-size: 1rem;
    }

    .error-text {
        border-radius: 0.5rem;
        font-size: 1rem;
    }
}

/* Mobile-specific optimizations */
@media (max-width: 768px) {
    /* Header adjustments */
    .header {
        padding: 0.5rem 0.75rem;
    }
    
    .header-title h1 {
        font-size: 1rem;
    }
    
    .header-content {
        gap: 0.5rem;
        flex-wrap: nowrap;  /* Ensure no wrapping */
    }
    
    .header-nav {
        gap: 0.25rem;
    }
    
    /* Chat messages mobile */
    .chat-messages {
        padding: 0.5rem;
    }
    
    .message {
        margin-bottom: 0.5rem;
    }
    
    .message-content {
        max-width: 90%;
        padding: 0.625rem 0.875rem;
        font-size: 0.95rem;
    }
    
    /* Chat input mobile */
    .chat-input-container {
        padding: 0.5rem;
        padding-bottom: calc(0.5rem + env(safe-area-inset-bottom));
    }
    
    #messageInput {
        min-height: 48px;
        padding: 0.75rem 1rem;
        font-size: 16px !important; /* Prevent zoom */
    }
    
    #sendButton {
        min-width: 60px;
        min-height: 48px;
        padding: 0.75rem 1rem;
    }
    
    /* Info banner mobile */
    .anonymous-info-banner {
        padding: 0.5rem 0.75rem;
        font-size: 0.85rem;
    }
    
    .anonymous-info-banner .message-counter {
        padding: 0.25rem 0.5rem;
        font-size: 0.8rem;
    }

    /* Prevent zoom on input focus */
    input,
    textarea,
    select {
        font-size: 16px !important;
    }

    /* Handle virtual keyboard */
    @supports (height: 100dvh) {
        .container {
            height: 100dvh;
        }
    }
}

/* Small mobile devices */
@media (max-width: 480px) {
    .header-title h1 {
        font-size: 0.95rem;
    }
    
    .header {
        padding: 0.4rem 0.5rem;
    }
    
    .message-content {
        max-width: 95%;
        font-size: 0.9rem;
    }
    
    #sendButton span {
        display: none;
    }
    
    #sendButton::after {
        content: "→";
        font-size: 1.25rem;
    }
    
    /* Anonymous banner for very small mobile devices */
    .anonymous-info-banner .info-content::before {
        font-size: 0.8rem;
    }
    
    .anonymous-info-banner .message-counter {
        font-size: 0.75rem;
        padding: 0.2rem 0.4rem;
    }
}

/* Tablet styles */
@media (min-width: 769px) and (max-width: 1024px) {
    .container {
        max-width: 90%;
        margin: 1rem auto;
        border-radius: 0.5rem;
        overflow: hidden;
    }

    .message-content {
        max-width: 75%;
    }
}

/* Large desktop styles */
@media (min-width: 1025px) {
    .container {
        max-width: 900px;
    }

    .message-content {
        max-width: 65%;
    }
}

/* Scrollbar styling */
.chat-messages::-webkit-scrollbar {
    width: 6px;
}

.chat-messages::-webkit-scrollbar-track {
    background: white;
}

.chat-messages::-webkit-scrollbar-thumb {
    background: black;
    border-radius: 3px;
}

.chat-messages::-webkit-scrollbar-thumb:hover {
    background: black;
}

/* To
uch and interaction improvements */
@media (hover: none) and (pointer: coarse) {

    /* Mobile-specific touch improvements */
    #sendButton:hover {
        background-color: #667eea;
        transform: none;
    }

    #sendButton:active {
        background-color: #5a6fd8;
        transform: scale(0.98);
    }
}

/* High DPI display optimizations */
@media (-webkit-min-device-pixel-ratio: 2),
(min-resolution: 192dpi) {
    .header {
        background-color: black;
    }
}

/* E-ink friendly design - no dark mode needed */

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    .spinner {
        animation: none;
    }
}

/* Print styles */
@media print {

    .header,
    .chat-input-container,
    .loading-indicator {
        display: none;
    }

    .chat-messages {
        padding: 0;
        background: white;
    }

    .message-content {
        max-width: 100%;
        border: 1px solid #ccc;
        page-break-inside: avoid;
    }
}

/* Choice Page Styles */
.choose-container {
    width: 100%;
    min-height: calc(100vh - 60px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    background: white;
}

.choose-wrapper {
    text-align: center;
}

.choose-title {
    font-size: 2rem;
    margin-bottom: 3rem;
    color: black;
    font-weight: normal;
}


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




.choose-button {
    display: inline-block;
    padding: 1rem 3rem;
    background: black;
    color: white;
    text-decoration: none;
    border: 2px solid black;
    border-radius: 2rem;
    font-weight: normal;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-size: 0.9rem;
}

.choose-button:hover {
    background: white;
    color: black;
}


.auth-buttons {
    display: flex;
    gap: 1rem;
}


/* Anonymous User Styles */
.anonymous-user {
    color: black;
    font-style: normal;
}


.session-expiry-warning {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: black;
    color: white;
    padding: 1rem;
    text-align: center;
    z-index: 10000;
}

.session-expiry-warning button {
    background: white;
    color: black;
    border: 2px solid white;
    border-radius: 1rem;
    padding: 0.5rem 1rem;
    margin: 0 0.5rem;
    cursor: pointer;
}

.session-expiry-warning button:hover {
    background: black;
    color: white;
}

/* System message styles */
.message.system .message-content {
    background: white;
    color: black;
    border: 2px solid black;
    border-radius: 1rem;
    font-style: normal;
}

/* Mobile responsive for choice page */
@media (max-width: 768px) {
    .choose-options {
        grid-template-columns: 1fr;
    }
    
    .choose-title {
        font-size: 2rem;
    }
    
    .auth-buttons {
        flex-direction: column;
    }
    
    .choose-button {
        width: 100%;
    }
}