/* ============================================================
   Code Anatomy — Shared Styles
   Covers: Tab Navigation, Editor, Visualizer, Flow Diagram
   ============================================================ */

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

:root {
    --bg-dark: #0a0a0f;
    --bg-darker: #13131a;
    --bg-darkest: #05050a;
    --border: #2a2a35;
    --border-bright: #3a3a45;
    --text: #e8e8f0;
    --text-dim: #8a8a9a;
    --text-bright: #ffffff;
    --accent: #6366f1;
    --accent-hover: #818cf8;
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;
    --purple: #a78bfa;
    --blue: #60a5fa;
    --green: #34d399;
    --orange: #fb923c;
    --pink: #f472b6;
    --cyan: #22d3ee;
}

body {
    font-family: 'Inter', sans-serif;
    background: var(--bg-dark);
    color: var(--text);
    overflow: hidden;
}

/* ── MAIN TAB NAVIGATION ── */

.main-tabs {
    display: flex;
    align-items: center;
    background: linear-gradient(180deg, #0e0e18, var(--bg-darker));
    border-bottom: 1px solid var(--border);
    padding: 0 1rem;
    gap: 0;
    height: 44px;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.4);
}

.main-tab-logo {
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 2px;
    color: var(--text-dim);
    padding: 0 1rem 0 0.5rem;
    text-decoration: none;
    border-right: 1px solid var(--border);
    margin-right: 0;
    line-height: 44px;
    transition: color 0.2s;
    white-space: nowrap;
}

.main-tab-logo:hover {
    color: var(--text);
}

.main-tab-group {
    display: flex;
    height: 100%;
}

.main-tab {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0 1.2rem;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-dim);
    text-decoration: none;
    border-right: 1px solid rgba(255,255,255,0.04);
    position: relative;
    transition: all 0.2s;
    height: 100%;
    white-space: nowrap;
}

.main-tab:hover {
    color: var(--text);
    background: rgba(255, 255, 255, 0.03);
}

.main-tab.active {
    color: var(--text-bright);
    background: var(--bg-dark);
}

.main-tab.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--accent), var(--purple));
}

.main-tab svg {
    opacity: 0.6;
    flex-shrink: 0;
}

.main-tab.active svg {
    opacity: 1;
}

/* ── EDITOR WRAPPER ── */

.editor-wrapper {
    display: flex;
    flex-direction: column;
    height: 100vh;
}

/* ── TOPBAR ── */

.topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.7rem 1.5rem;
    background: linear-gradient(180deg, var(--bg-darker) 0%, var(--bg-dark) 100%);
    border-bottom: 1px solid var(--border);
    backdrop-filter: blur(10px);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
}

.topbar-left {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.topbar-actions {
    display: flex;
    align-items: center;
    gap: 0.8rem;
}

.back-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: transparent;
    border: none;
    color: var(--text-dim);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: color 0.2s;
    font-family: inherit;
}

.back-btn:hover { color: var(--text); }

.logo-small {
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 1.5px;
    color: var(--text-dim);
}

/* ── API KEY BUTTON ── */

.api-key-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border);
    color: var(--text-dim);
    font-size: 0.8rem;
    font-family: inherit;
    cursor: pointer;
    border-radius: 8px;
    transition: all 0.2s;
}

.api-key-btn:hover {
    border-color: var(--accent);
    color: var(--text);
}

/* ── PROCESS BUTTON ── */

.process-btn {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.65rem 1.8rem;
    background: linear-gradient(135deg, var(--accent) 0%, var(--purple) 100%);
    color: var(--text-bright);
    border: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    font-family: inherit;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3), 0 2px 4px rgba(0, 0, 0, 0.2);
    position: relative;
    overflow: hidden;
}

.process-btn::before {
    content: '';
    position: absolute;
    top: 0; left: -100%;
    width: 100%; height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s;
}

.process-btn:hover::before { left: 100%; }

.process-btn:hover:not(:disabled) {
    background: linear-gradient(135deg, var(--accent-hover) 0%, var(--purple) 100%);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.4);
    transform: translateY(-2px);
}

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

.process-btn.loading::after {
    content: '';
    width: 14px; height: 14px;
    border: 2px solid transparent;
    border-top-color: currentColor;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
    margin-left: 0.5rem;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* ── EDITOR LAYOUT ── */

.editor-layout {
    flex: 1;
    display: grid;
    grid-template-columns: 1fr 1px 1fr;
    overflow: hidden;
}

.editor-pane {
    display: flex;
    flex-direction: column;
    background: var(--bg-dark);
}

.pane-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: linear-gradient(180deg, var(--bg-darker) 0%, var(--bg-dark) 100%);
    border-bottom: 1px solid var(--border);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.tabs { display: flex; }

.tab {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.25rem;
    font-size: 0.85rem;
    color: var(--text-dim);
    background: transparent;
    border-right: 1px solid var(--border);
    cursor: pointer;
    font-family: 'JetBrains Mono', monospace;
    transition: all 0.2s;
    position: relative;
}

.tab:hover { background: rgba(110, 118, 129, 0.1); }

.tab.active {
    color: var(--text);
    background: var(--bg-dark);
}

.tab.active::after {
    content: '';
    position: absolute;
    bottom: 0; left: 0; right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--accent), var(--purple));
}

.tab-icon {
    font-size: 0.6rem;
    color: var(--success);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0 1rem;
}

/* ── LANGUAGE DROPDOWN ── */

.language-dropdown {
    background: var(--bg-darkest);
    color: var(--text);
    border: 2px solid var(--border);
    padding: 0.5rem 1rem;
    font-size: 0.8rem;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border-radius: 8px;
    font-weight: 600;
    min-width: 140px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1.5L6 6.5L11 1.5' stroke='%238a8a9a' stroke-width='2' stroke-linecap='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.8rem center;
    padding-right: 2.2rem;
}

.language-dropdown:hover {
    border-color: var(--accent);
    background-color: var(--bg-darker);
}

.language-dropdown:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

.language-dropdown option {
    background: var(--bg-darkest);
    color: var(--text);
}

/* ── HEADER BTN ── */

.header-btn {
    background: transparent;
    border: none;
    color: var(--text-dim);
    cursor: pointer;
    padding: 0.5rem;
    display: flex;
    align-items: center;
    transition: all 0.2s;
    border-radius: 6px;
}

.header-btn:hover {
    color: var(--accent);
    background: rgba(99, 102, 241, 0.1);
}

/* ── CODE EDITOR ── */

.editor-content {
    flex: 1;
    display: flex;
    overflow: hidden;
    position: relative;
    background: var(--bg-dark);
}

.line-numbers {
    position: absolute;
    top: 0; left: 0;
    padding: 1rem 1rem 1rem 0.5rem;
    background: var(--bg-dark);
    color: var(--text-dim);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.9rem;
    line-height: 1.6;
    text-align: right;
    user-select: none;
    width: 60px;
    height: 100%;
    overflow: hidden;
    pointer-events: none;
    border-right: 1px solid var(--border);
}

.code-area {
    flex: 1;
    background: transparent;
    color: transparent;
    caret-color: var(--accent);
    border: none;
    padding: 1rem 1rem 1rem 70px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.9rem;
    line-height: 1.6;
    resize: none;
    outline: none;
    overflow-y: auto;
    overflow-x: auto;
    tab-size: 4;
    white-space: pre;
    word-wrap: normal;
    overflow-wrap: normal;
    position: relative;
    z-index: 2;
    -webkit-text-fill-color: transparent;
}

.code-area::placeholder {
    color: var(--text-dim);
    opacity: 0.5;
    -webkit-text-fill-color: var(--text-dim);
}

.code-area::-webkit-scrollbar { width: 12px; height: 12px; }
.code-area::-webkit-scrollbar-track { background: var(--bg-dark); }
.code-area::-webkit-scrollbar-thumb { background: var(--border-bright); border-radius: 6px; border: 2px solid var(--bg-dark); }
.code-area::-webkit-scrollbar-thumb:hover { background: var(--accent); }
.code-area::-webkit-scrollbar-corner { background: var(--bg-dark); }
.code-area::selection { background: rgba(99, 102, 241, 0.3); }

.divider { background: var(--border); }

/* ── CODE HIGHLIGHT ── */

.code-highlight {
    position: absolute;
    top: 0; left: 70px; right: 0; bottom: 0;
    padding: 1rem 1rem 1rem 0;
    margin: 0;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.9rem;
    line-height: 1.6;
    overflow: hidden;
    pointer-events: none;
    z-index: 1;
    white-space: pre;
    word-wrap: normal;
}

.code-highlight code {
    display: block;
    background: transparent !important;
    padding: 0 !important;
}

.code-highlight .hljs-keyword { color: #bb9af7; font-weight: 600; }
.code-highlight .hljs-string { color: #9ece6a; }
.code-highlight .hljs-number { color: #ff9e64; }
.code-highlight .hljs-comment { color: #565f89; font-style: italic; }
.code-highlight .hljs-function { color: #7aa2f7; }
.code-highlight .hljs-title { color: #7dcfff; font-weight: 600; }
.code-highlight .hljs-params { color: #e0af68; }
.code-highlight .hljs-built_in { color: #f7768e; }
.code-highlight .hljs-type { color: #2ac3de; }
.code-highlight .hljs-literal { color: #ff9e64; }
.code-highlight .hljs-variable { color: #c0caf5; }
.code-highlight .hljs-meta { color: #bb9af7; }
.code-highlight .hljs-operator { color: #89ddff; }
.code-highlight .hljs-class { color: #7dcfff; font-weight: 600; }

/* ── STATUS BAR ── */

.statusbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 1rem;
    background: linear-gradient(180deg, var(--bg-dark), var(--bg-darker));
    border-top: 1px solid var(--border);
    color: var(--text-dim);
    font-size: 0.75rem;
    font-weight: 500;
    box-shadow: 0 -2px 4px rgba(0, 0, 0, 0.2);
}

.status-left, .status-right {
    display: flex;
    gap: 1.5rem;
}

/* ── ERROR TOAST ── */

.error-toast {
    position: fixed;
    top: 5rem; right: 2rem;
    background: linear-gradient(135deg, var(--error), #dc2626);
    color: white;
    padding: 1rem 1.5rem;
    border-radius: 8px;
    box-shadow: 0 8px 24px rgba(239, 68, 68, 0.4);
    z-index: 1000;
    animation: slideIn 0.3s ease-out;
    font-weight: 500;
    font-size: 0.85rem;
}

@keyframes slideIn {
    from { transform: translateX(400px); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

/* ── API KEY MODAL ── */

.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(8px);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-card {
    background: var(--bg-darker);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 2rem;
    width: 420px;
    max-width: 90vw;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.modal-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--text-bright);
}

.modal-card p {
    font-size: 0.8rem;
    color: var(--text-dim);
    margin-bottom: 1.2rem;
    line-height: 1.5;
}

.modal-input {
    width: 100%;
    padding: 0.75rem 1rem;
    background: var(--bg-darkest);
    border: 2px solid var(--border);
    border-radius: 8px;
    color: var(--text);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
    margin-bottom: 1rem;
    outline: none;
    transition: border-color 0.2s;
}

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

.modal-actions {
    display: flex;
    gap: 0.8rem;
    justify-content: flex-end;
}

.modal-btn {
    padding: 0.6rem 1.5rem;
    border-radius: 8px;
    font-size: 0.85rem;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.2s;
}

.modal-btn.secondary {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-dim);
}

.modal-btn.secondary:hover {
    border-color: var(--text-dim);
    color: var(--text);
}

.modal-btn.primary {
    background: linear-gradient(135deg, var(--accent), var(--purple));
    border: none;
    color: white;
}

.modal-btn.primary:hover {
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4);
}

.modal-link {
    display: block;
    text-align: center;
    margin-top: 1rem;
    font-size: 0.75rem;
    color: var(--accent);
    text-decoration: none;
}

.modal-link:hover { text-decoration: underline; }

/* ══════════════════════════════════════════════
   VISUALIZER STYLES
   ══════════════════════════════════════════════ */

.visualizer-input-area {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    background: var(--bg-dark);
}

.viz-input-container {
    width: 100%;
    max-width: 800px;
    height: 70%;
    display: flex;
    flex-direction: column;
}

.viz-input-header {
    padding: 0.8rem 1.2rem;
    background: var(--bg-darker);
    border: 1px solid var(--border);
    border-bottom: none;
    border-radius: 12px 12px 0 0;
    font-size: 0.85rem;
    color: var(--text-dim);
}

.viz-code-input {
    flex: 1;
    background: var(--bg-darkest);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 0 0 12px 12px;
    padding: 1rem 1.2rem;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
    line-height: 1.7;
    resize: none;
    outline: none;
    white-space: pre;
    tab-size: 4;
}

.viz-code-input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.viz-code-input::placeholder {
    color: var(--text-dim);
    opacity: 0.5;
}

/* ── VISUALIZER CONTROLS ── */

.viz-controls {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.6rem 1rem;
    background: var(--bg-darker);
    border-bottom: 1px solid var(--border);
    gap: 1rem;
}

.viz-controls-left,
.viz-controls-right {
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.viz-controls-center {
    flex: 1;
    display: flex;
    align-items: center;
    gap: 1rem;
    max-width: 500px;
}

.viz-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: rgba(255, 255, 255, 0.03);
    color: var(--text-dim);
    cursor: pointer;
    transition: all 0.2s;
}

.viz-btn:hover {
    border-color: var(--accent);
    color: var(--text);
    background: rgba(99, 102, 241, 0.1);
}

.viz-btn.primary {
    background: linear-gradient(135deg, var(--accent), var(--purple));
    border-color: transparent;
    color: white;
    width: 40px;
    height: 40px;
}

.viz-btn.primary:hover {
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4);
    transform: scale(1.05);
}

.viz-progress-bar {
    flex: 1;
    height: 4px;
    background: var(--border);
    border-radius: 2px;
    overflow: hidden;
}

.viz-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent), var(--purple));
    border-radius: 2px;
    transition: width 0.3s ease;
    width: 0%;
}

.viz-line-counter {
    font-size: 0.75rem;
    color: var(--text-dim);
    white-space: nowrap;
    font-family: 'JetBrains Mono', monospace;
}

.viz-speed-label {
    font-size: 0.7rem;
    color: var(--text-dim);
    margin-right: 0.3rem;
}

.viz-speed-slider {
    width: 60px;
    accent-color: var(--accent);
    cursor: pointer;
}

/* ── VISUALIZER LAYOUT ── */

.visualizer-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.viz-layout {
    flex: 1;
    display: grid;
    grid-template-columns: 1fr 1px 340px;
    overflow: hidden;
}

.viz-code-panel,
.viz-info-panel {
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.viz-panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.6rem 1rem;
    background: var(--bg-darker);
    border-bottom: 1px solid var(--border);
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-dim);
}

.viz-filename {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.7rem;
    color: var(--accent);
}

/* ── CODE LINES ── */

.viz-code-lines {
    flex: 1;
    overflow-y: auto;
    padding: 0.5rem 0;
    background: var(--bg-dark);
}

.viz-code-lines::-webkit-scrollbar { width: 8px; }
.viz-code-lines::-webkit-scrollbar-track { background: var(--bg-dark); }
.viz-code-lines::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }

.viz-line {
    display: flex;
    align-items: center;
    padding: 0.15rem 1rem;
    gap: 0.8rem;
    cursor: pointer;
    transition: all 0.15s;
    border-left: 3px solid transparent;
    min-height: 28px;
}

.viz-line:hover {
    background: rgba(255, 255, 255, 0.02);
}

.viz-line-active {
    background: rgba(99, 102, 241, 0.08) !important;
    border-left-color: var(--accent);
    box-shadow: inset 0 0 30px rgba(99, 102, 241, 0.05);
}

.viz-line-active .viz-line-content {
    text-shadow: 0 0 8px rgba(99, 102, 241, 0.3);
}

.viz-line-past {
    opacity: 0.5;
}

.viz-line-num {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
    color: var(--text-dim);
    min-width: 30px;
    text-align: right;
    user-select: none;
    opacity: 0.5;
}

.viz-line-active .viz-line-num {
    color: var(--accent);
    opacity: 1;
}

.viz-line-content {
    flex: 1;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.82rem;
    line-height: 1.5;
    white-space: pre;
    overflow: hidden;
    text-overflow: ellipsis;
}

.viz-line-tag {
    font-size: 0.6rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-dim);
    opacity: 0;
    transition: opacity 0.2s;
    white-space: nowrap;
}

.viz-line:hover .viz-line-tag,
.viz-line-active .viz-line-tag {
    opacity: 1;
}

/* ── INFO PANEL ── */

.viz-info-panel {
    background: var(--bg-darker);
    overflow-y: auto;
}

.viz-section {
    padding: 0.8rem 1rem;
    border-bottom: 1px solid var(--border);
}

.viz-section-title {
    font-size: 0.65rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-dim);
    margin-bottom: 0.6rem;
}

.viz-current-line {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.8rem;
    color: var(--text);
    background: var(--bg-darkest);
    padding: 0.6rem 0.8rem;
    border-radius: 6px;
    border: 1px solid var(--border);
    line-height: 1.5;
    white-space: pre-wrap;
    word-break: break-all;
    margin: 0;
}

.viz-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
}

.viz-tag {
    display: inline-block;
    padding: 0.2rem 0.6rem;
    border-radius: 6px;
    font-size: 0.7rem;
    font-weight: 600;
}

/* ── VARIABLE TABLE ── */

.viz-var-empty {
    color: var(--text-dim);
    font-size: 0.8rem;
    font-style: italic;
    padding: 0.5rem 0;
}

.viz-var-tbl {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.75rem;
}

.viz-var-tbl th {
    text-align: left;
    padding: 0.3rem 0.5rem;
    font-weight: 600;
    color: var(--text-dim);
    border-bottom: 1px solid var(--border);
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.viz-var-tbl td {
    padding: 0.3rem 0.5rem;
    border-bottom: 1px solid rgba(255,255,255,0.03);
}

.var-name {
    font-family: 'JetBrains Mono', monospace;
    color: var(--cyan);
    font-weight: 600;
}

.var-value {
    font-family: 'JetBrains Mono', monospace;
    color: var(--green);
    max-width: 100px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.var-line {
    color: var(--text-dim);
    font-family: 'JetBrains Mono', monospace;
}

.var-scope {
    color: var(--purple);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.65rem;
}

/* ── SCOPE STACK ── */

.viz-scope {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.3rem;
}

.viz-scope-item {
    display: inline-block;
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    font-size: 0.7rem;
    font-family: 'JetBrains Mono', monospace;
    font-weight: 500;
    background: rgba(99, 102, 241, 0.1);
    color: var(--accent);
    border: 1px solid rgba(99, 102, 241, 0.2);
}

.viz-scope-arrow {
    color: var(--text-dim);
    font-size: 0.7rem;
}

/* ══════════════════════════════════════════════
   FLOW DIAGRAM STYLES
   ══════════════════════════════════════════════ */

.view-toggle {
    display: flex;
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
}

.toggle-btn {
    padding: 0.45rem 1rem;
    font-size: 0.75rem;
    font-weight: 600;
    font-family: inherit;
    background: transparent;
    border: none;
    color: var(--text-dim);
    cursor: pointer;
    transition: all 0.2s;
}

.toggle-btn:first-child {
    border-right: 1px solid var(--border);
}

.toggle-btn:hover {
    color: var(--text);
}

.toggle-btn.active {
    background: linear-gradient(135deg, var(--accent), var(--purple));
    color: white;
}

/* ── DIAGRAM AREA ── */

.diagram-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    position: relative;
}

.diagram-toolbar {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.5rem 1rem;
    background: var(--bg-darker);
    border-bottom: 1px solid var(--border);
}

.diagram-divider {
    width: 1px;
    height: 20px;
    background: var(--border);
    margin: 0 0.3rem;
}

.diagram-legend {
    display: flex;
    align-items: center;
    gap: 1.2rem;
    padding: 0.5rem 1rem;
    background: rgba(255,255,255,0.02);
    border-bottom: 1px solid var(--border);
    font-size: 0.7rem;
    color: var(--text-dim);
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.legend-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    display: inline-block;
}

.legend-diamond {
    width: 10px;
    height: 10px;
    background: #f59e0b;
    transform: rotate(45deg);
    display: inline-block;
}

.legend-rect {
    width: 14px;
    height: 8px;
    background: var(--border-bright);
    border-radius: 2px;
    display: inline-block;
}

.diagram-canvas {
    flex: 1;
    overflow: hidden;
    cursor: grab;
    background:
        radial-gradient(circle at center, rgba(99,102,241,0.03) 0%, transparent 70%),
        linear-gradient(rgba(255,255,255,0.015) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.015) 1px, transparent 1px);
    background-size: 100% 100%, 30px 30px, 30px 30px;
}

.diagram-canvas svg {
    width: 100%;
    height: 100%;
}

/* ── NODE TOOLTIP ── */

.node-tooltip {
    position: absolute;
    background: var(--bg-darkest);
    border: 1px solid var(--accent);
    border-radius: 10px;
    padding: 0.8rem 1rem;
    max-width: 350px;
    z-index: 100;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5), 0 0 20px rgba(99, 102, 241, 0.15);
    pointer-events: none;
}

.tooltip-title {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--accent);
    margin-bottom: 0.4rem;
}

.tooltip-code {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
    color: var(--text);
    background: transparent;
    margin: 0;
    padding: 0;
    line-height: 1.5;
    white-space: pre-wrap;
    word-break: break-all;
}

/* ── RESPONSIVE ── */

@media (max-width: 768px) {
    .editor-layout {
        grid-template-columns: 1fr;
        grid-template-rows: 1fr 1px 1fr;
    }
    .divider { height: 1px; }
    .topbar {
        flex-direction: column;
        gap: 0.5rem;
        align-items: stretch;
    }
    .topbar-actions {
        justify-content: flex-end;
        flex-wrap: wrap;
    }
    .process-btn { width: 100%; justify-content: center; }
    .main-tabs { overflow-x: auto; }
    .viz-layout {
        grid-template-columns: 1fr;
        grid-template-rows: 1fr 1px 300px;
    }
    .main-tab {
        font-size: 0.7rem;
        padding: 0 0.8rem;
    }
    .main-tab-logo {
        font-size: 0.6rem;
    }
}