/* ============================================================
   BlackVibe — Cursor-inspired dark UI
   ============================================================ */

:root {
    --bg: #181818;
    --bg-elev: #1f1f1f;
    --bg-elev2: #252525;
    --bg-hover: #2a2a2a;
    --bg-active: #2f2f2f;
    --border: #2e2e2e;
    --border-strong: #3c3c3c;
    --text: #e6e6e6;
    --text-dim: #9a9a9a;
    --text-faint: #6b6b6b;
    --accent: #4a8dff;
    --accent-hover: #5d9aff;
    --accent-dim: rgba(74, 141, 255, 0.14);
    --danger: #e5534b;
    --danger-dim: rgba(229, 83, 75, 0.14);
    --warn: #d29922;
    --ok: #3fb950;
    --radius: 8px;
    --radius-sm: 6px;
    --sidebar-w: 264px;
    --chat-w: 440px;
    --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --mono: ui-monospace, "Cascadia Code", "Source Code Pro", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }

html, body {
    margin: 0;
    padding: 0;
    height: 100%;
    background: var(--bg);
    color: var(--text);
    font-family: var(--font);
    font-size: 14px;
    line-height: 1.5;
    overscroll-behavior: none;
}

.hidden { display: none !important; }
.mono { font-family: var(--mono); }

.app {
    display: grid;
    grid-template-columns: var(--sidebar-w) 1fr var(--chat-w);
    height: 100dvh;
    overflow: hidden;
}

/* ---------------- Sidebar ---------------- */

.sidebar {
    background: var(--bg);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 12px;
    border-bottom: 1px solid var(--border);
}

.brand { display: flex; align-items: center; gap: 8px; }

.brand-mark {
    width: 14px; height: 14px;
    background: linear-gradient(135deg, var(--accent) 0%, #8a5cff 100%);
    border-radius: 4px;
    display: inline-block;
}
.brand-mark.big { width: 40px; height: 40px; border-radius: 10px; opacity: .8; }

.brand-name { font-weight: 600; letter-spacing: .2px; }

.sidebar-projects {
    padding: 12px;
    border-bottom: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.field-label {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: .6px;
    color: var(--text-faint);
}

.project-row { display: flex; gap: 6px; }

.project-select, .model-select, .text-input {
    width: 100%;
    background: var(--bg-elev);
    color: var(--text);
    border: 1px solid var(--border-strong);
    border-radius: var(--radius-sm);
    padding: 7px 9px;
    font-size: 13px;
    font-family: var(--font);
    outline: none;
}
.project-select:focus, .model-select:focus, .text-input:focus {
    border-color: var(--accent);
}
.text-input.mono { font-family: var(--mono); font-size: 12.5px; }

.project-actions { display: flex; gap: 8px; }

.btn {
    flex: 1;
    background: var(--bg-elev);
    border: 1px solid var(--border-strong);
    color: var(--text);
    border-radius: var(--radius-sm);
    padding: 7px 10px;
    font-size: 13px;
    cursor: pointer;
    transition: background .12s ease, border-color .12s ease;
    white-space: nowrap;
}
.btn:hover { background: var(--bg-hover); border-color: #4a4a4a; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.primary:hover { background: var(--accent-hover); }
.btn.danger { background: var(--danger-dim); border-color: rgba(229, 83, 75, .4); color: #ff8a84; }
.btn.danger:hover { background: rgba(229, 83, 75, .25); }
.btn:disabled { opacity: .5; cursor: not-allowed; }

.icon-btn {
    background: transparent;
    border: none;
    color: var(--text-dim);
    font-size: 16px;
    padding: 4px 8px;
    border-radius: var(--radius-sm);
    cursor: pointer;
}
.icon-btn:hover { background: var(--bg-hover); color: var(--text); }

.upload-progress { display: flex; flex-direction: column; gap: 4px; }
.upload-progress-bar {
    height: 4px; background: var(--bg-elev2); border-radius: 2px; overflow: hidden;
}
.upload-progress-bar > div {
    height: 100%; width: 0%;
    background: var(--accent);
    transition: width .2s ease;
}
.upload-progress-text { font-size: 11.5px; color: var(--text-dim); }

/* File tree */

.file-tree {
    flex: 1;
    overflow-y: auto;
    padding: 8px 6px 24px;
    user-select: none;
}

.tree-item {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 3.5px 8px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    color: var(--text-dim);
    font-size: 13px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.tree-item:hover { background: var(--bg-hover); color: var(--text); }
.tree-item.active { background: var(--accent-dim); color: var(--accent-hover); }
.tree-item .twist {
    width: 12px;
    display: inline-block;
    text-align: center;
    font-size: 9px;
    color: var(--text-faint);
    transition: transform .12s ease;
    flex: none;
}
.tree-item .twist.open { transform: rotate(90deg); }
.tree-item .icon { flex: none; opacity: .85; }
.tree-item span.label { overflow: hidden; text-overflow: ellipsis; }
.tree-children { margin-left: 14px; }
.tree-empty { color: var(--text-faint); padding: 12px; font-size: 13px; }

/* ---------------- Editor pane ---------------- */

.editor-pane {
    background: var(--bg-elev);
    min-width: 0;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.editor-empty {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-faint);
    text-align: center;
    padding: 24px;
}
.editor-empty-inner { display: flex; flex-direction: column; align-items: center; gap: 16px; }

.editor-view { flex: 1; display: flex; flex-direction: column; min-height: 0; }

.editor-path-bar {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 6px 16px;
    border-bottom: 1px solid var(--border);
    background: var(--bg);
    min-height: 37px;
}
.editor-path { font-family: var(--mono); font-size: 12.5px; color: var(--text-dim); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.editor-size { font-size: 11.5px; color: var(--text-faint); flex: none; }

.editor-toolbar-actions {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 8px;
    flex: none;
}
.editor-toolbar-actions .btn { flex: none; padding: 4px 12px; font-size: 12.5px; }
.editor-dirty { color: var(--warn); font-size: 15px; line-height: 1; }

.editor-scroll { flex: 1; overflow: auto; min-height: 0; }

/* Editor: a single contenteditable <pre> with Prism-highlighted content —
   one layout engine, so text and highlight can never drift apart. */
.editor-edit { position: relative; flex: 1; min-height: 0; overflow: hidden; }
.editor-ce {
    position: absolute;
    inset: 0;
    overflow: auto;
    outline: none;
    cursor: text;
    white-space: pre;
    caret-color: #ffffff;
}
.editor-ce:focus { box-shadow: inset 0 0 0 1px var(--accent); }

.editor-pre {
    margin: 0;
    padding: 14px 16px;
    font-family: var(--mono);
    font-size: 12.8px;
    line-height: 1.55;
    tab-size: 4;
}
.editor-pre code {
    font-family: var(--mono);
    white-space: pre;
    display: block;
    min-height: 100%;
}

/* Prism adjustments for the dark palette */
code[class*="language-"], pre[class*="language-"] {
    color: #d4d4d4;
    text-shadow: none;
    background: transparent !important;
}
.token.comment, .token.prolog, .token.doctype, .token.cdata { color: #6a9955; }
.token.punctuation { color: #d4d4d4; }
.token.property, .token.tag, .token.constant, .token.symbol, .token.deleted { color: #569cd6; }
.token.boolean, .token.number { color: #b5cea8; }
.token.selector, .token.attr-name, .token.string, .token.char, .token.builtin, .token.inserted { color: #ce9178; }
.token.operator, .token.entity, .token.url, .language-css .token.string, .style .token.string { color: #d4d4d4; }
.token.atrule, .token.attr-value, .token.keyword { color: #c586c0; }
.token.function, .token.class-name { color: #dcdcaa; }
.token.regex, .token.important, .token.variable { color: #d16969; }

/* ---------------- Chat pane ---------------- */

.chat-pane {
    background: var(--bg);
    border-left: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    min-width: 0;
    min-height: 0;
}

.chat-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 12px;
    border-bottom: 1px solid var(--border);
    gap: 8px;
}
.chat-model { display: flex; align-items: center; gap: 8px; min-width: 0; flex: 1; }
.model-select { max-width: 200px; width: auto; min-width: 0; font-size: 12.5px; padding: 5px 7px; }
.session-select { max-width: 190px; }

@media (max-width: 600px) {
    .chat-project-badge { display: none; }
    .session-select { max-width: 130px; }
    .model-select { max-width: 120px; }
}

.chat-project-badge {
    font-size: 11px;
    color: var(--text-dim);
    background: var(--bg-elev);
    border: 1px solid var(--border);
    padding: 3px 8px;
    border-radius: 999px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 16px 14px;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.chat-welcome { color: var(--text-dim); text-align: center; margin-top: 12vh; padding: 0 12px; }
.chat-welcome h2 { font-size: 17px; color: var(--text); margin: 0 0 8px; }
.chat-welcome p { font-size: 13px; margin: 0; color: var(--text-faint); }

.msg { max-width: 100%; }
.msg-user {
    align-self: flex-end;
    background: var(--bg-elev2);
    border: 1px solid var(--border-strong);
    border-radius: 12px 12px 4px 12px;
    padding: 9px 12px;
    max-width: 92%;
    white-space: pre-wrap;
    word-break: break-word;
}

.msg-restore {
    display: block;
    margin-top: 7px;
    margin-left: auto;
    background: transparent;
    border: 1px solid var(--border-strong);
    color: var(--text-faint);
    font-size: 11px;
    font-family: var(--font);
    padding: 2px 10px;
    border-radius: 999px;
    cursor: pointer;
    opacity: 0.55;
    transition: opacity .15s ease, color .15s ease, border-color .15s ease;
}
.msg-restore:hover, .msg-restore:focus {
    opacity: 1;
    color: var(--accent-hover);
    border-color: var(--accent);
}
.msg-assistant { align-self: stretch; }
.msg-assistant .who {
    font-size: 11px;
    color: var(--text-faint);
    margin-bottom: 4px;
    display: flex;
    gap: 6px;
    align-items: center;
}
.msg-content {
    word-break: break-word;
    overflow-wrap: anywhere;
}
.msg-content p { margin: 0 0 8px; }
.msg-content p:last-child { margin-bottom: 0; }
.msg-content ul, .msg-content ol { margin: 4px 0 8px; padding-left: 22px; }
.msg-content h1, .msg-content h2, .msg-content h3 { font-size: 14.5px; margin: 10px 0 6px; }
.msg-content a { color: var(--accent-hover); }
.msg-content code {
    font-family: var(--mono);
    font-size: 12.3px;
    background: var(--bg-elev2);
    border: 1px solid var(--border);
    padding: 1px 5px;
    border-radius: 4px;
}
.msg-content pre {
    background: #141414;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 10px 12px;
    overflow-x: auto;
    margin: 6px 0;
}
.msg-content pre code {
    background: transparent; border: none; padding: 0;
    font-size: 12.3px; line-height: 1.5; display: block;
    white-space: pre;
}
.msg-content blockquote {
    margin: 6px 0; padding: 2px 12px;
    border-left: 3px solid var(--border-strong);
    color: var(--text-dim);
}
.msg-content table { border-collapse: collapse; margin: 6px 0; font-size: 12.8px; }
.msg-content th, .msg-content td { border: 1px solid var(--border-strong); padding: 4px 8px; }

.reasoning-block {
    font-size: 12px;
    color: var(--text-faint);
    border-left: 2px solid var(--border-strong);
    padding: 4px 10px;
    margin: 4px 0 6px;
    white-space: pre-wrap;
    max-height: 140px;
    overflow-y: auto;
}

/* Tool call cards */
.tool-card {
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--bg-elev);
    margin: 6px 0;
    overflow: hidden;
    font-size: 12.5px;
}
.tool-card-head {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 7px 10px;
    cursor: pointer;
    user-select: none;
}
.tool-card-head .tool-icon { flex: none; }
.tool-card-head .tool-name { font-weight: 600; }
.tool-card-head .tool-desc {
    color: var(--text-faint);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    flex: 1;
    min-width: 0;
}
.tool-card-head .tool-status { flex: none; font-size: 11px; }
.tool-status.ok { color: var(--ok); }
.tool-status.err { color: var(--danger); }
.tool-status.run { color: var(--warn); }
.tool-card-body {
    display: none;
    border-top: 1px solid var(--border);
    padding: 8px 10px;
    max-height: 260px;
    overflow: auto;
    background: #141414;
}
.tool-card.open .tool-card-body { display: block; }
.tool-card-body pre {
    margin: 0;
    font-family: var(--mono);
    font-size: 11.8px;
    white-space: pre-wrap;
    word-break: break-word;
    color: #c9c9c9;
}

.cursor-blink {
    display: inline-block;
    width: 7px; height: 15px;
    background: var(--accent);
    vertical-align: text-bottom;
    animation: blink 1s steps(1) infinite;
    border-radius: 1px;
}
@keyframes blink { 50% { opacity: 0; } }

.chat-status {
    padding: 6px 14px;
    font-size: 12px;
    color: var(--text-dim);
    border-top: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 8px;
}
.chat-status .spinner {
    width: 12px; height: 12px;
    border: 2px solid var(--border-strong);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin .8s linear infinite;
    flex: none;
}
@keyframes spin { to { transform: rotate(360deg); } }

.chat-form {
    display: flex;
    align-items: flex-end;
    gap: 8px;
    padding: 10px 12px 12px;
    border-top: 1px solid var(--border);
}
#chat-input {
    flex: 1;
    resize: none;
    background: var(--bg-elev);
    border: 1px solid var(--border-strong);
    border-radius: 10px;
    color: var(--text);
    font-family: var(--font);
    font-size: 13.5px;
    padding: 9px 12px;
    max-height: 160px;
    outline: none;
    line-height: 1.45;
}
#chat-input:focus { border-color: var(--accent); }
.chat-send {
    background: var(--accent);
    border: none;
    color: #fff;
    width: 36px; height: 36px;
    border-radius: 10px;
    font-size: 15px;
    cursor: pointer;
    flex: none;
}
.chat-send:hover { background: var(--accent-hover); }
.chat-send:disabled { background: var(--bg-elev2); color: var(--text-faint); cursor: not-allowed; }
.chat-send.stop { background: var(--danger); }
.chat-send.stop:hover { background: #f0685f; }

/* ---------------- Modals ---------------- */

.modal-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, .55);
    backdrop-filter: blur(2px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
    padding: 16px;
}

.modal {
    background: var(--bg-elev);
    border: 1px solid var(--border-strong);
    border-radius: 12px;
    width: 100%;
    max-width: 460px;
    box-shadow: 0 18px 60px rgba(0, 0, 0, .5);
    animation: modal-in .14s ease;
}
@keyframes modal-in { from { transform: translateY(8px); opacity: 0; } }

.modal-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 16px 0;
}
.modal-head h3 { margin: 0; font-size: 15px; }
.modal-body { padding: 12px 16px; display: flex; flex-direction: column; gap: 14px; }
.modal-foot { padding: 12px 16px 16px; display: flex; gap: 10px; justify-content: flex-end; }

.settings-section h4 {
    margin: 0 0 8px;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: .6px;
    color: var(--text-dim);
}
.settings-section .field-label { margin: 8px 0 4px; display: block; }
.settings-section .field-label:first-of-type { margin-top: 0; }
.field-hint { font-size: 11.5px; color: var(--text-faint); margin-top: 4px; }
.field-hint.ok { color: var(--ok); }
.field-hint.warn { color: var(--warn); }

/* Approval dialog */

.approval-modal { border-color: rgba(210, 153, 34, .45); }
.approval-head {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 16px 18px 4px;
}
.approval-head h3 { margin: 0; font-size: 15px; color: var(--warn); }
.approval-body { padding: 10px 18px; display: flex; flex-direction: column; gap: 8px; }
.approval-row { display: flex; gap: 10px; align-items: baseline; }
.approval-label {
    flex: none;
    width: 74px;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: .5px;
    color: var(--text-faint);
}
.approval-value { word-break: break-all; }
.approval-value.mono { font-family: var(--mono); font-size: 12.8px; }
.approval-actions {
    display: flex;
    gap: 8px;
    padding: 8px 18px 4px;
}
.approval-timer {
    padding: 10px 18px 14px;
    font-size: 12px;
    color: var(--text-faint);
}

/* Toasts */

.toast-container {
    position: fixed;
    bottom: 18px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    gap: 8px;
    z-index: 200;
    align-items: center;
}
.toast {
    background: var(--bg-elev2);
    border: 1px solid var(--border-strong);
    color: var(--text);
    padding: 9px 16px;
    border-radius: 10px;
    font-size: 13px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, .4);
    animation: modal-in .15s ease;
    max-width: 80vw;
}
.toast.error { border-color: rgba(229, 83, 75, .5); color: #ff9a94; }
.toast.ok { border-color: rgba(63, 185, 80, .5); }

/* ---------------- Mobile ---------------- */

.mobile-tabs { display: none; }

@media (max-width: 980px) {
    .app {
        grid-template-columns: 1fr;
        grid-template-rows: 1fr;
    }
    .sidebar, .editor-pane, .chat-pane {
        display: none;
        border: none;
        width: 100%;
        height: 100dvh;
    }
    .app[data-tab="sidebar"] .sidebar { display: flex; }
    .app[data-tab="editor-pane"] .editor-pane { display: flex; }
    .app[data-tab="chat-pane"] .chat-pane { display: flex; }

    .mobile-tabs {
        display: flex;
        position: fixed;
        bottom: 0; left: 0; right: 0;
        background: var(--bg-elev);
        border-top: 1px solid var(--border-strong);
        z-index: 50;
        padding-bottom: env(safe-area-inset-bottom);
    }
    .mobile-tabs button {
        flex: 1;
        background: none;
        border: none;
        color: var(--text-dim);
        padding: 12px 0;
        font-size: 13px;
        cursor: pointer;
        font-family: var(--font);
    }
    .mobile-tabs button.active { color: var(--accent); }

    .chat-form { padding-bottom: 64px; }
    .modal-backdrop { align-items: flex-end; }
    .modal { max-width: none; border-radius: 14px 14px 0 0; margin-bottom: 0; }
    .approval-actions { flex-direction: column; }
}

/* Scrollbars */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-thumb { background: #333; border-radius: 5px; border: 2px solid var(--bg); }
::-webkit-scrollbar-thumb:hover { background: #444; }
::-webkit-scrollbar-track { background: transparent; }