/**
 * PUMKIN AI COPILOT - VS CODE IDE SPLIT-SCREEN THEME
 * 3/4 Workspace on the Left, 1/4 Socratic Copilot on the Right
 */

:root {
    --vsc-bg-sidebar: #181818;
    --vsc-bg-header: #1f1f1f;
    --vsc-bg-editor: #1e1e1e;
    --vsc-bg-bubble-ai: #202327;
    --vsc-bg-bubble-user: #2d3139;
    --vsc-bg-input: #252526;
    --vsc-border: #2d2d2d;
    --vsc-border-focus: #007acc;
    --vsc-accent: #007acc;
    --vsc-accent-hover: #0098ff;
    --vsc-text-main: #cccccc;
    --vsc-text-bright: #ffffff;
    --vsc-text-muted: #858585;
    --vsc-code-font: "Cascadia Code", "Fira Code", Consolas, "Courier New", monospace;
    --vsc-panel-width: 25vw;
}

/* ==========================================================================
   DESKTOP SPLIT-SCREEN: 3/4 WORKSPACE (LEFT) & 1/4 AI PANEL (RIGHT)
   ========================================================================== */
@media (min-width: 900px) {
    /* When Copilot is active, workspace contracts to 75% width (3/4 screen) */
    body.vsc-split-active {
        overflow-x: hidden;
    }

    body.vsc-split-active .wrapper,
    body.vsc-split-active .pumkin-nav-container {
        width: calc(100vw - var(--vsc-panel-width)) !important;
        max-width: calc(100vw - var(--vsc-panel-width)) !important;
        margin-left: 0 !important;
        margin-right: var(--vsc-panel-width) !important;
        box-sizing: border-box;
    }

    body.vsc-split-active .player-main-layout {
        grid-template-columns: 1fr 240px !important;
        gap: 14px !important;
        padding: 16px !important;
    }

    /* Transition back when closed */
    .wrapper,
    .pumkin-nav-container {
        transition: width 0.3s cubic-bezier(0.16, 1, 0.3, 1), margin-right 0.3s cubic-bezier(0.16, 1, 0.3, 1), margin-left 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    }

    /* Fixed 25% Docked Right Sidebar (1/4 screen) */
    #pumkin-tutor-panel {
        position: fixed;
        right: 0;
        top: 0;
        bottom: 0;
        width: var(--vsc-panel-width) !important;
        min-width: 320px;
        border-left: 1px solid var(--vsc-border);
        box-shadow: -6px 0 24px rgba(0, 0, 0, 0.35);
        z-index: 99999;
        transform: translateX(0);
        transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    }

    #pumkin-tutor-panel[aria-hidden="true"] {
        transform: translateX(105%);
        pointer-events: none;
    }
}

/* Mobile & Tablet Fallback (Slide-in Drawer) */
@media (max-width: 899px) {
    #pumkin-tutor-panel {
        position: fixed;
        left: 0;
        right: 0;
        bottom: 0;
        height: 85vh;
        max-height: 90vh;
        border-top: 2px solid var(--vsc-accent);
        border-radius: 14px 14px 0 0;
        box-shadow: 0 -8px 30px rgba(0, 0, 0, 0.5);
        z-index: 99999;
        transform: translateY(0);
        transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    }

    #pumkin-tutor-panel[aria-hidden="true"] {
        transform: translateY(105%);
        pointer-events: none;
    }
}

/* ==========================================================================
   VS CODE COPILOT PANEL STYLING
   ========================================================================== */
#pumkin-tutor-panel {
    display: flex;
    flex-direction: column;
    background: var(--vsc-bg-sidebar);
    color: var(--vsc-text-main);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    font-size: 13.5px;
    line-height: 1.5;
    box-sizing: border-box;
}

/* Title bar */
.vsc-titlebar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 14px;
    background: var(--vsc-bg-header);
    border-bottom: 1px solid var(--vsc-border);
    user-select: none;
}

.vsc-title-group {
    display: flex;
    align-items: center;
    gap: 8px;
}

.vsc-copilot-icon {
    font-size: 16px;
    color: var(--vsc-accent);
}

.vsc-title {
    font-weight: 700;
    font-size: 12.5px;
    letter-spacing: 0.5px;
    color: var(--vsc-text-bright);
    text-transform: uppercase;
}

.vsc-status-badge {
    font-size: 11px;
    padding: 2px 7px;
    background: rgba(0, 122, 204, 0.2);
    color: #4fc1ff;
    border: 1px solid rgba(0, 122, 204, 0.4);
    border-radius: 10px;
    font-weight: 600;
}

.vsc-quota-badge {
    font-size: 11px;
    padding: 2px 8px;
    background: rgba(16, 185, 129, 0.2);
    color: #34d399;
    border: 1px solid rgba(16, 185, 129, 0.4);
    border-radius: 10px;
    font-weight: 700;
    letter-spacing: 0.2px;
    transition: all 0.2s ease;
    user-select: none;
    white-space: nowrap;
}

.vsc-quota-badge.warning {
    background: rgba(245, 158, 11, 0.2);
    color: #fbbf24;
    border-color: rgba(245, 158, 11, 0.45);
}

.vsc-quota-badge.exhausted {
    background: rgba(239, 68, 68, 0.2);
    color: #f87171;
    border-color: rgba(239, 68, 68, 0.45);
}

.vsc-window-controls {
    display: flex;
    align-items: center;
    gap: 6px;
}

.vsc-btn-icon {
    background: transparent;
    border: none;
    color: var(--vsc-text-muted);
    font-size: 14px;
    cursor: pointer;
    padding: 4px 8px;
    border-radius: 4px;
    transition: all 0.15s ease;
}

.vsc-btn-icon:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--vsc-text-bright);
}

.vsc-btn-icon.close:hover {
    background: #e81123;
    color: #ffffff;
}

/* Secondary Tabs / Breadcrumb Bar */
.vsc-tabs-bar {
    display: flex;
    align-items: center;
    padding: 0 8px;
    background: #141414;
    border-bottom: 1px solid var(--vsc-border);
    font-size: 11.5px;
    overflow-x: auto;
}

.vsc-tab {
    padding: 6px 12px;
    color: var(--vsc-text-muted);
    border-bottom: 2px solid transparent;
    display: flex;
    align-items: center;
    gap: 6px;
    white-space: nowrap;
    cursor: default;
}

.vsc-tab.active {
    color: var(--vsc-text-bright);
    border-bottom-color: var(--vsc-accent);
    background: var(--vsc-bg-sidebar);
}

/* Context Breadcrumb */
.vsc-context-bar {
    padding: 7px 14px;
    background: #1e1e1e;
    border-bottom: 1px solid var(--vsc-border);
    font-size: 12px;
    color: var(--vsc-text-muted);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.vsc-context-title {
    color: #9cdcfe;
    font-family: var(--vsc-code-font);
    font-weight: 600;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.vsc-context-tag {
    background: #2d2d2d;
    color: #ce9178;
    padding: 1px 6px;
    border-radius: 3px;
    font-size: 11px;
    font-family: var(--vsc-code-font);
}

/* Chat History Stream */
.vsc-chat-stream {
    flex: 1;
    overflow-y: auto;
    padding: 14px;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.vsc-chat-stream::-webkit-scrollbar {
    width: 10px;
}

.vsc-chat-stream::-webkit-scrollbar-thumb {
    background: #333333;
    border-radius: 3px;
}

/* Chat Bubbles */
.tutor-bubble {
    padding: 10px 14px;
    border-radius: 8px;
    font-size: 13.5px;
    line-height: 1.55;
    word-break: break-word;
    max-width: 90%;
    animation: vscFadeIn 0.2s ease-out;
}

@keyframes vscFadeIn {
    from { opacity: 0; transform: translateY(6px); }
    to { opacity: 1; transform: translateY(0); }
}

.tutor-bubble.user {
    align-self: flex-end;
    background: var(--vsc-bg-bubble-user);
    color: #ffffff;
    border: 1px solid #3e4451;
    border-bottom-right-radius: 2px;
}

.tutor-bubble.ai {
    align-self: flex-start;
    background: var(--vsc-bg-bubble-ai);
    color: #d4d4d4;
    border-left: 3px solid var(--vsc-accent);
    border: 1px solid #2d3139;
    border-left-width: 3px;
    border-bottom-left-radius: 2px;
}

.tutor-bubble.error {
    align-self: flex-start;
    background: #374151 !important; /* Nền bong bóng chat màu xám */
    color: #f3f4f6 !important;
    border: 1px solid #4b5563 !important;
    border-left: 3.5px solid #9ca3af !important;
    border-radius: 8px;
    font-size: 13.5px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 16px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.25);
}

.tutor-bubble.error strong {
    color: #ef4444;
}

/* Quick Actions Toolbar */
.vsc-quick-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    padding: 8px 12px;
    background: #141414;
    border-top: 1px solid var(--vsc-border);
}

.vsc-chip {
    background: var(--vsc-bg-input);
    border: 1px solid var(--vsc-border);
    color: #9cdcfe;
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 11.5px;
    cursor: pointer;
    transition: all 0.15s ease;
    user-select: none;
}

.vsc-chip:hover {
    background: var(--vsc-accent);
    color: #ffffff;
    border-color: var(--vsc-accent);
}

/* Input Area */
.vsc-input-box {
    padding: 10px 12px;
    background: var(--vsc-bg-header);
    border-top: 1px solid var(--vsc-border);
    display: flex;
    gap: 8px;
    align-items: center;
}

.vsc-input-wrapper {
    flex: 1;
    position: relative;
    display: flex;
    align-items: center;
}

.vsc-input {
    width: 100%;
    background: var(--vsc-bg-input);
    color: var(--vsc-text-bright);
    border: 1px solid var(--vsc-border);
    border-radius: 6px;
    padding: 9px 12px;
    font-size: 13px;
    font-family: inherit;
    outline: none;
    transition: border-color 0.2s ease;
}

.vsc-input:focus {
    border-color: var(--vsc-border-focus);
    box-shadow: 0 0 0 1px var(--vsc-border-focus);
}

.vsc-send-btn {
    background: var(--vsc-accent);
    color: #ffffff;
    border: none;
    border-radius: 6px;
    padding: 9px 14px;
    font-size: 12.5px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.15s ease;
    display: flex;
    align-items: center;
    gap: 4px;
}

.vsc-send-btn:hover {
    background: var(--vsc-accent-hover);
}

.vsc-send-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

/* Typing indicator */
.tutor-typing {
    display: flex;
    gap: 5px;
    align-items: center;
    padding: 10px 14px;
}

.tutor-dot {
    width: 6px;
    height: 6px;
    background: var(--vsc-accent);
    border-radius: 50%;
    animation: vscPulse 1.4s infinite ease-in-out both;
}

.tutor-dot:nth-child(1) { animation-delay: -0.32s; }
.tutor-dot:nth-child(2) { animation-delay: -0.16s; }
.tutor-dot:nth-child(3) { animation-delay: 0s; }

@keyframes vscPulse {
    0%, 80%, 100% { transform: scale(0.6); opacity: 0.4; }
    40% { transform: scale(1.1); opacity: 1; }
}