:root {
    --bg-primary: #1a1a1a;
    --bg-secondary: #2c2c2c;
    --text-primary: #f0f0f0;
    --text-secondary: #a0a0a0;
    --accent: #6b6b6b;
    --accent-hover: #8b8b8b;
    --border: #3a3a3a;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    margin: 0;
    height: 100vh;
    overflow: hidden;
}

.app-container {
    display: flex;
    height: 100%;
}

/* Sidebar */
.sidebar {
    width: 260px;
    background-color: var(--bg-secondary);
    border-right: 1px solid var(--border);
    position: fixed;
    top: 0;
    left: 0;
    height: 100%;
    z-index: 200;
    transform: translateX(-100%);
    transition: transform 0.3s ease-in-out;
    display: flex;
    flex-direction: column;
}

.sidebar.open {
    transform: translateX(0);
}

.sidebar-header {
    padding: 1rem;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.03em;
    color: var(--text-primary);
    font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.close-sidebar {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.5rem;
    cursor: pointer;
}

.sidebar-content {
    padding: 1rem;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.sidebar-footer {
    padding: 1rem;
    border-top: 1px solid var(--border);
}

.change-activation-btn {
    width: 100%;
    padding: 0.75rem;
    background-color: transparent;
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-secondary);
    font-size: 0.85rem;
    cursor: pointer;
    transition: background-color 0.2s, border-color 0.2s, color 0.2s;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    justify-content: center;
}

.change-activation-btn:hover {
    background-color: var(--bg-primary);
    border-color: var(--accent);
    color: var(--text-primary);
}

.new-chat-btn {
    width: 100%;
    padding: 0.75rem;
    background-color: transparent;
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 0.9rem;
    cursor: pointer;
    transition: background-color 0.2s, border-color 0.2s;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.new-chat-btn:hover {
    background-color: var(--bg-primary);
    border-color: var(--accent);
}

.new-chat-btn svg.sidebar-new-chat-icon {
    width: 18px;
    height: 18px;
    display: inline-block;
    vertical-align: middle;
}

.settings-section h3, .chat-history h3 {
    font-size: 0.8rem;
    font-weight: 500;
    text-transform: uppercase;
    color: var(--text-secondary);
    margin-bottom: 1rem;
    letter-spacing: 0.05em;
}

.chat-history {
    display: flex;
    flex-direction: column;
    overflow: hidden;
    flex: 1;
    min-height: 0;
}

    .history-list {
        display: flex;
        flex-direction: column;
        gap: 0.5rem;
        overflow-y: auto;
        flex: 1;
        min-height: 0;
    }
    .history-item {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 0.5rem;
        border-radius: 8px;
        background: transparent;
        color: var(--text-primary);
        border: 1px solid transparent;
        cursor: pointer;
    }
    .history-item:hover {
        background: rgba(255,255,255,0.02);
        border-color: var(--border);
    }
    .history-title { flex: 1; font-size: 0.9rem; color: var(--text-primary); }
    .history-meta { font-size: 0.75rem; color: var(--text-secondary); margin-left: 8px; }
    .history-delete {
        border: none; background: transparent; color: var(--text-secondary); font-size: 1rem; padding: 0 6px; margin-left: 8px; cursor: pointer;
        opacity: 0; pointer-events: none; transition: opacity 0.15s, transform 0.15s; transform: translateX(4px);
    }
    .history-item.active { background: rgba(107,107,107,0.06); border-color: var(--accent); }

    .history-item:hover .history-delete { opacity: 1; pointer-events: auto; transform: translateX(0); }

.setting-group {
    margin-bottom: 1rem;
}

.setting-group label {
    display: block;
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.setting-select {
    width: 100%;
    padding: 0.5rem;
    background-color: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 4px;
    color: var(--text-primary);
    font-size: 0.9rem;
}

.lesson-status {
    margin-top: 1rem;
    padding: 0.75rem;
    border-radius: 4px;
    font-size: 0.9rem;
    display: none;
}

.lesson-status.success {
    display: block;
    background-color: rgba(107, 107, 107, 0.1);
    color: var(--accent);
}

.lesson-status.error {
    display: block;
    background-color: rgba(255, 59, 48, 0.1);
    color: #ff3b30;
}

/* Main Content */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    height: 100vh;
    position: relative;
    transition: margin-left 0.3s ease-in-out;
}

.main-content.sidebar-open {
    margin-left: 260px;
}

/* top-left shared controls wrapper */
.top-controls {
    position: fixed;
    top: 1rem;
    left: 1rem;
    z-index: 101;
    display: flex;
    gap: 6px;
    align-items: center;
    padding: 4px;
    border-radius: 10px;
    transition: background-color 0.18s ease, box-shadow 0.18s ease;
    background-color: transparent; /* becomes solid when `.chatting` is present on <body> */
}

.top-controls button {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    cursor: pointer;
}

.top-controls button:hover,
.top-controls button:focus {
    background: rgba(255,255,255,0.02);
    color: var(--text-primary);
    outline: none;
}

/* Keyboard focus styles for accessibility */
.menu-btn:focus-visible, .new-chat-icon:focus-visible {
    box-shadow: 0 0 0 3px rgba(0,0,0,0.2);
    outline: none;
    border-radius: 8px;
}

/* When the app is in an active chat state give the top buttons a stronger background
   so they're visually present while chatting. This class is toggled on the <body>
   by the app's JavaScript (adds `chatting` when messages exist). */
.chatting .top-controls {
    background-color: var(--bg-secondary); /* solid, non-transparent background when chatting */
    border: 1px solid var(--border);
}

.chatting .top-controls button {
    color: var(--text-primary);
}

.chatting .top-controls button:hover {
    background-color: rgba(255,255,255,0.03);
}

.chat-container {
    flex: 1;
    overflow-y: auto;
    padding: 2rem;
    display: flex;
    flex-direction: column;
}

.welcome-screen {
    flex-grow: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.welcome-content h1 {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    letter-spacing: -0.04em;
    color: var(--text-primary);
    font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.welcome-content p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.welcome-content .settings-section {
    max-width: 400px;
    margin: 0 auto;
}

.welcome-content .setting-group {
    margin-bottom: 1rem;
    text-align: left;
}

.welcome-content .setting-group label {
    display: block;
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.welcome-content .setting-select {
    width: 100%;
    padding: 0.75rem;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 1rem;
}

.welcome-content .lesson-status {
    margin-top: 1.5rem;
    padding: 0.75rem;
    border-radius: 8px;
    font-size: 0.9rem;
    display: none;
}

.welcome-content .lesson-status.success {
    display: block;
    background-color: rgba(107, 107, 107, 0.1);
    color: var(--accent);
    border: 1px solid var(--accent);
}

.welcome-content .lesson-status.error {
    display: block;
    background-color: rgba(255, 59, 48, 0.1);
    color: #ff3b30;
    border: 1px solid #ff3b30;
}

.welcome-content .lesson-status.info {
    display: block;
    background-color: rgba(100, 100, 100, 0.1);
    color: var(--text-secondary);
    border: 1px solid var(--border);
}

.messages {
    max-width: 800px;
    width: 100%;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
}

.message {
    margin-bottom: 1rem;
    max-width: 80%;
    display: flex;
}

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

/* Make the message container vertical so the edit button can appear under the bubble */
.message.user {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
}

.message.assistant {
    align-self: flex-start;
    /* Allow assistant messages to take the full available width under the user message */
    max-width: 100%;
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.message-avatar {
   display: none;
}

.message-content {
    line-height: 1.6;
    font-size: 1rem;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    letter-spacing: 0;
    word-spacing: 0;
    padding: 0.75rem 1rem;
    border-radius: 12px;
}

/* Respect the message's text direction. Use dir="auto" on message content elements so
   browsers detect RTL (Arabic/Hebrew) vs LTR and align accordingly. */
.message-content[dir="rtl"] {
    direction: rtl;
    text-align: right;
    unicode-bidi: plaintext;
}
.message-content[dir="ltr"] {
    direction: ltr;
    text-align: left;
    unicode-bidi: plaintext;
}

.message.assistant .message-content {
    background-color: transparent;
    color: var(--text-primary);
    border-top-left-radius: 0;
    padding: 0.75rem 1rem; /* Provide padding so text isn't stuck to the left edge */
    width: 100%;
    box-sizing: border-box;
}

.message.user .message-content {
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    padding: 0.75rem; /* equal padding on all sides */
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 0.5rem;
}

.message.user .message-text {
    color: var(--text-primary);
    display: inline-block;
}

.message-content p:last-child {
    margin-bottom: 0;
    margin-top: 0;
}

.message-content h1,
.message-content h2,
.message-content h3,
.message-content h4,
.message-content h5 {
    margin-top: 1.5rem;
    margin-bottom: 0.75rem;
    font-weight: 600;
}

.message-content h1 {
    font-size: 1.5rem;
}

.message-content h2 {
    font-size: 1.3rem;
}

.message-content h3 {
    font-size: 1.1rem;
}

.message-content h4 {
    font-size: 1rem;
}

.message-content h5 {
    font-size: 0.95rem;
}

.message-content ul,
.message-content ol {
    margin: 0.5rem 0;
    padding-left: 1.5rem;
}


.message-content a {
    color: var(--accent);
    text-decoration: underline;
}

.message-content a:hover {
    color: var(--accent-hover);
}

.message-content strong {
    font-weight: 600;
}

.message-content em {
    font-style: italic;
}

.message-content code {
    font-family: 'SF Mono', 'Menlo', 'Monaco', monospace;
    font-size: 0.9rem;
    background-color: var(--bg-secondary);
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
}

.message-content pre {
    background-color: var(--bg-secondary);
    padding: 1rem;
    border-radius: 8px;
    overflow-x: auto;
    margin: 1rem 0;
    border: 1px solid var(--border);
}

.message-content pre code {
    background-color: transparent;
    padding: 0;
    font-size: 0.9rem;
}

/* Input Container */
.input-container {
    padding: 1rem;
    background-color: var(--bg-primary);
    position: relative;
    z-index: 100;
}

/* Mobile-specific input container positioning */
@media (max-width: 768px) {
    .input-container {
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        padding: 1rem;
        padding-bottom: calc(1rem + env(safe-area-inset-bottom));
        background-color: var(--bg-primary);
        z-index: 100;
    }
    
    /* Add padding to chat container to prevent content from being hidden behind input */
    .chat-container {
        padding-bottom: calc(80px + env(safe-area-inset-bottom));
    }
    
    /* Adjust main content to account for fixed input */
    .main-content {
        padding-bottom: 0;
    }
}

.typing-indicator {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem 0;
}

.typing-text {
    font-size: 0.95rem;
    color: var(--text-secondary);
    font-style: italic;
}

.typing-dots {
    display: flex;
    gap: 4px;
}

.typing-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--text-secondary);
    animation: typing 1.4s infinite;
}

.typing-dot:nth-child(2) {
    animation-delay: 0.2s;
}

.typing-dot:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes typing {
    0%, 60%, 100% {
        opacity: 0.3;
        transform: translateY(0);
    }
    30% {
        opacity: 1;
        transform: translateY(-6px);
    }
}

.input-wrapper {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    align-items: center; /* center items vertically */
    gap: 8px;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 24px;
    padding: 8px; /* more even padding to center controls */
}

/* Make sure all control buttons center align inside the input wrapper */
.input-wrapper .image-btn,
.input-wrapper .send-btn,
.input-wrapper .stop-btn {
    align-self: center;
}

.input-wrapper .image-btn,
.input-wrapper .send-btn,
.input-wrapper .stop-btn {
    box-sizing: border-box; /* keep the outer size fixed even with border */
}

.input-wrapper button svg {
    display: block; /* avoid svg baseline alignment issues */
}

.image-btn {
    width: 36px;
    height: 36px;
    border-radius: 8px;
    border: none;
    background-color: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.2s, color 0.2s;
    flex-shrink: 0;
    margin-right: 8px;
    margin-bottom: 0; /* remove bottom margin so it centers with textarea */
}

.image-btn:hover {
    background-color: var(--bg-primary);
    color: var(--text-primary);
}

.message-input {
    flex: 1;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1rem;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    letter-spacing: 0;
    word-spacing: 0;
    resize: none;
    outline: none;
    padding: 8px 12px;
    max-height: 100px;
    line-height: 1.5;
    min-height: 40px; /* ensure alignment with larger send button */
    box-sizing: border-box; /* include padding in height calculations */
}

.message-input::placeholder {
    color: var(--text-secondary);
}

/* Ensure the main input respects automatic direction detection (RTL/LTR) */
.message-input[dir="rtl"] {
    direction: rtl;
    text-align: right;
}
.message-input[dir="ltr"] {
    direction: ltr;
    text-align: left;
}

.send-btn {
    width: 40px; /* slightly bigger */
    height: 40px; /* slightly bigger */
    border-radius: 50%;
    border: none;
    background-color: var(--text-primary);
    color: var(--bg-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.2s;
    flex-shrink: 0;
    margin-left: 8px;
    margin-bottom: 0; /* align vertically */
}

.send-btn:hover:not(:disabled) {
    background-color: var(--text-secondary);
}

.send-btn:disabled {
    background-color: #ffffff;
    cursor: not-allowed;
    opacity: 0.5;
}

.stop-btn {
    width: 40px; /* match send button size */
    height: 40px; /* match send button size */
    border-radius: 50%; /* circular button */
    border: 1px solid var(--border);
    background-color: var(--bg-primary); /* visible background */
    color: var(--text-primary); /* visible square color */
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.2s, border-color 0.2s, color 0.2s;
    flex-shrink: 0;
    margin-left: 8px;
    margin-bottom: 0; /* align vertically */
}

.stop-btn:hover {
    background-color: rgba(255, 59, 48, 0.1);
    border-color: #ff3b30;
    color: #ff3b30;
}

.stop-btn:active {
    transform: scale(0.98);
}

/* Image Preview */
.image-preview-container {
    max-width: 800px;
    margin: 0.5rem auto 0;
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.image-preview {
    position: relative;
    width: 100px;
    height: 100px;
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid var(--border);
}

.image-preview img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.remove-image-btn {
    position: absolute;
    top: 4px;
    right: 4px;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    border: none;
    background-color: rgba(0, 0, 0, 0.7);
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.2s;
}

.remove-image-btn:hover {
    background-color: rgba(255, 59, 48, 0.9);
}

/* Message Images */
.message-image {
    max-width: 300px;
    max-height: 300px;
    width: auto;
    height: auto;
    border-radius: 8px;
    margin-top: 0.5rem;
    display: block;
    object-fit: contain;
}

/* Safety: Constrain any image inside message content so restored HTML without class
   does not overflow the chat area. This ensures images are never shown too big. */
.message-content img {
    max-width: 300px;
    max-height: 300px;
    width: auto;
    height: auto;
    border-radius: 8px;
    margin-top: 0.5rem;
    display: block;
    object-fit: contain;
}

/* Edit button for user messages */
.edit-message-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    width: 36px;
    height: 36px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 6px;
    border-radius: 8px;
    margin-top: 8px; /* placed under the message bubble */
    align-self: flex-end;
    opacity: 0;
    transform: translateY(-4px);
    transition: opacity 0.15s ease, transform 0.15s ease;
    pointer-events: none;
}
.edit-message-btn:hover {
    background: rgba(255,255,255,0.02);
    color: var(--text-primary);
}

/* Copy button for messages */
.copy-message-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    width: 36px;
    height: 36px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 6px;
    border-radius: 8px;
    margin-top: 8px;
    align-self: flex-end;
    opacity: 0;
    transform: translateY(-4px);
    transition: opacity 0.15s ease, transform 0.15s ease, background-color 0.2s ease, color 0.2s ease;
    pointer-events: none;
}
.copy-message-btn:hover {
    background: rgba(255,255,255,0.02);
    color: var(--text-primary);
}
.copy-message-btn.copy-success {
    background: transparent;
    color: var(--accent);
    opacity: 1;
    pointer-events: auto;
}
.copy-message-btn.copy-success:hover {
    background: rgba(255,255,255,0.02);
    color: var(--accent);
}

/* Regenerate button for assistant messages */
.regenerate-message-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    width: 36px;
    height: 36px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 6px;
    border-radius: 8px;
    margin-top: 8px;
    align-self: flex-start;
    opacity: 0;
    transform: translateY(-4px);
    transition: opacity 0.15s ease, transform 0.15s ease;
    pointer-events: none;
}
.regenerate-message-btn:hover {
    background: rgba(255,255,255,0.02);
    color: var(--text-primary);
}

/* Button container for user messages */
.message-buttons {
    display: flex;
    flex-direction: row;
    gap: 8px;
    align-self: flex-end;
    margin-top: 8px;
}

/* For assistant messages, align buttons to the left */
.message.assistant .message-buttons {
    align-self: flex-start;
}

/* For assistant messages, align copy button to the left */
.message.assistant .copy-message-btn {
    align-self: flex-start;
}

/* Only show the edit button on hover-capable devices when hovering the message */
@media (hover: hover) {
    .message.user:hover .edit-message-btn {
        opacity: 1;
        transform: none;
        pointer-events: auto;
    }
    .message:hover .copy-message-btn {
        opacity: 1;
        transform: none;
        pointer-events: auto;
    }
    .message.assistant:hover .regenerate-message-btn {
        opacity: 1;
        transform: none;
        pointer-events: auto;
    }
}

/* Hide edit and copy controls on small/touch devices to avoid accidental UI complexity */
@media (max-width: 768px) {
    .edit-message-btn,
    .copy-message-btn,
    .regenerate-message-btn {
        display: none !important;
    }
}

/* Small label appended when a message was edited */
.edited-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-left: 6px;
}

/* Inline edit area and actions */
.inline-edit-area {
    width: 100%;
    min-height: 48px;
    max-height: 240px;
    resize: vertical;
    padding: 8px;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 0.95rem;
    box-sizing: border-box;
}
.inline-edit-area[dir="rtl"] {
    direction: rtl;
    text-align: right;
}
.inline-edit-area[dir="ltr"] {
    direction: ltr;
    text-align: left;
}
.inline-edit-actions {
    display: flex;
    gap: 8px;
    margin-top: 8px;
}
.inline-edit-actions .inline-edit-save,
.inline-edit-actions .inline-edit-cancel {
    padding: 6px 10px;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    font-size: 0.9rem;
}
.inline-edit-actions .inline-edit-save {
    background-color: var(--text-primary);
    color: var(--bg-primary);
}
.inline-edit-actions .inline-edit-cancel {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border);
}

/* Icon-only appearance for inline edit actions */
.inline-edit-actions .inline-edit-save i,
.inline-edit-actions .inline-edit-cancel i {
    font-size: 14px;
    display: inline-block;
}

.inline-edit-actions .inline-edit-save {
    width: 36px;
    height: 36px;
    padding: 0;
    border-radius: 8px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}
.inline-edit-actions .inline-edit-cancel {
    width: 36px;
    height: 36px;
    padding: 0;
    border-radius: 8px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

/* Mobile Styles */
@media (max-width: 768px) {
    .main-content.sidebar-open {
        margin-left: 0;
    }
    
    .chat-container {
        padding: 1rem;
    }
    .welcome-content h1 {
        font-size: 2rem;
    }
    .input-wrapper {
        border-radius: 12px;
    }
    .send-btn, .stop-btn, .image-btn {
        width: 36px;
        height: 36px;
    }
    
    .activation-card {
        padding: 1.5rem;
        width: 95%;
    }
    
    .activation-card h2 {
        font-size: 1.5rem;
    }
    
    .activation-input-group {
        flex-direction: column;
        gap: 0.75rem;
    }
    
    .activate-btn {
        width: 100%;
    }
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 6px;
}
::-webkit-scrollbar-track {
    background: transparent;
}
::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

/* Activation Modal */
.activation-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.85);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    backdrop-filter: blur(4px);
    animation: fadeIn 0.3s ease-in-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.activation-modal.hidden {
    display: none;
}

.activation-card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 2rem;
    max-width: 440px;
    width: 90%;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    animation: slideUp 0.3s ease-out;
    position: relative;
}

.activation-close-btn {
    position: absolute;
    top: 1rem;
    right: 1rem;
    width: 32px;
    height: 32px;
    border: none;
    background-color: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.2s, color 0.2s;
}

.activation-close-btn:hover {
    background-color: var(--bg-primary);
    color: var(--text-primary);
}

.activation-card h2 {
    margin: 0 0 0.5rem 0;
    font-size: 1.75rem;
    color: var(--text-primary);
    text-align: center;
}

.activation-card > p {
    margin: 1rem 0 1.5rem 0;
    color: var(--text-secondary);
    text-align: center;
    font-size: 0.95rem;
}

.activation-input-group {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.activation-input {
    flex: 1;
    padding: 0.875rem 1rem;
    background-color: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 1rem;
    outline: none;
    transition: border-color 0.2s;
}

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

.activation-input::placeholder {
    color: var(--text-secondary);
}

.activate-btn {
    padding: 0.875rem 1.5rem;
    background-color: var(--text-primary);
    border: none;
    border-radius: 8px;
    color: var(--bg-primary);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s, transform 0.1s;
    white-space: nowrap;
}

.activate-btn:hover {
    background-color: var(--accent-hover);
}

.activate-btn:active {
    transform: scale(0.98);
}

.activation-divider {
    display: flex;
    align-items: center;
    margin: 1.5rem 0;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.activation-divider::before,
.activation-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background-color: var(--border);
}

.activation-divider span {
    padding: 0 1rem;
}

.whatsapp-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    width: 100%;
    padding: 0.875rem 1rem;
    background-color: #25D366;
    border: none;
    border-radius: 8px;
    color: white;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    text-align: center;
    cursor: pointer;
    transition: background-color 0.2s, transform 0.1s;
    box-sizing: border-box;
}

.whatsapp-btn svg {
    flex-shrink: 0;
}

.whatsapp-btn span {
    flex-shrink: 0;
}

.whatsapp-btn:hover {
    background-color: #1fb855;
}

.whatsapp-btn:active {
    transform: scale(0.98);
}

.activation-help {
    margin: 1rem 0 0 0;
    font-size: 0.85rem;
    color: var(--text-secondary);
    text-align: center;
}

.activation-error {
    margin-top: 0.5rem;
    padding: 0.75rem;
    background-color: rgba(255, 59, 48, 0.1);
    border: 1px solid #ff3b30;
    border-radius: 8px;
    color: #ff3b30;
    font-size: 0.9rem;
    text-align: center;
}

.activation-success {
    margin-top: 0.5rem;
    padding: 0.75rem;
    background-color: rgba(107, 107, 107, 0.1);
    border: 1px solid var(--accent);
    border-radius: 8px;
    color: var(--accent);
    font-size: 0.9rem;
    text-align: center;
}