/* ============================================================
   Studio — Druid Learning Hub
   Shared styles for all 6 studios: Code, Web, Graphic, Notebook,
   System Design, AI Studio.
   ============================================================ */

/* ---- Full-height studio layout ---- */
.studio {
    display: flex;
    flex-direction: column;
    height: 100vh;
    overflow: hidden;
    background: var(--color-bg);
}

/* ---- Studio Header (44px) ---- */
.studio-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 44px;
    padding: 0 var(--space-3);
    background: var(--color-bg-secondary);
    border-bottom: 1px solid var(--color-border);
    flex-shrink: 0;
}
.studio-header__left {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}
.studio-header__back {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: var(--radius-md);
    color: var(--color-text-secondary);
    transition: background var(--transition-fast);
}
.studio-header__back:hover { background: var(--color-bg-tertiary); }
.studio-header__brand {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}
.studio-header__title {
    font-family: var(--font-heading);
    font-size: var(--text-sm);
    font-weight: var(--font-bold);
}
.studio-header__subtitle {
    font-size: 11px;
    color: var(--color-text-tertiary);
}
.studio-header__center {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}
.studio-header__right {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

/* ---- Studio Body (fills remaining space) ---- */
.studio-body {
    flex: 1;
    display: flex;
    overflow: hidden;
    min-height: 0;
}

/* ---- Studio Panels ---- */
.studio-panel {
    display: flex;
    flex-direction: column;
    overflow: hidden;
    min-width: 0;
}
.studio-panel--left { flex: 0 0 45%; border-right: 1px solid var(--color-border); }
.studio-panel--right { flex: 1; }

/* Panel header */
.panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--space-3);
    height: 36px;
    background: var(--color-bg-secondary);
    border-bottom: 1px solid var(--color-border);
    flex-shrink: 0;
    font-size: var(--text-xs);
    font-weight: var(--font-semibold);
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}
.panel-header__tabs {
    display: flex;
    gap: var(--space-1);
}
.panel-tab {
    padding: var(--space-2) var(--space-3);
    font-size: var(--text-xs);
    font-weight: var(--font-medium);
    color: var(--color-text-tertiary);
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: color var(--transition-fast), border-color var(--transition-fast);
}
.panel-tab:hover { color: var(--color-text); }
.panel-tab--active {
    color: var(--color-primary);
    border-bottom-color: var(--color-primary);
}

/* Panel content */
.panel-content {
    flex: 1;
    overflow: auto;
    min-height: 0;
}

/* ---- Editor/Terminal Split ---- */
.editor-split {
    display: flex;
    flex-direction: column;
    flex: 1;
    min-height: 0;
}
.editor-area {
    flex: 1;
    min-height: 0;
    position: relative;
}
.editor-area .ace_editor {
    position: absolute;
    inset: 0;
}
.terminal-area {
    flex: 0 0 35%;
    display: flex;
    flex-direction: column;
    border-top: 1px solid var(--color-border);
    min-height: 0;
}
.terminal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--space-3);
    height: 32px;
    background: var(--color-bg-secondary);
    border-bottom: 1px solid var(--color-border);
    flex-shrink: 0;
    font-size: var(--text-xs);
    font-weight: var(--font-semibold);
    color: var(--color-text-secondary);
}
.terminal-output {
    flex: 1;
    overflow: auto;
    padding: var(--space-3);
    font-family: var(--font-mono);
    font-size: var(--text-sm);
    background: #1E1E1E;
    color: #D4D4D4;
    min-height: 0;
    white-space: pre-wrap;
    word-break: break-word;
}

/* ---- Studio Action Bar (56px) ---- */
.studio-actions {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--space-3);
    height: 56px;
    background: var(--color-bg-secondary);
    border-top: 1px solid var(--color-border);
    flex-shrink: 0;
    gap: var(--space-2);
}
.studio-actions__group {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}
.studio-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: 8px 16px;
    font-size: var(--text-sm);
    font-weight: var(--font-semibold);
    border-radius: var(--radius-md);
    transition: background var(--transition-fast);
    white-space: nowrap;
}
.studio-btn--run {
    background: var(--color-success);
    color: #FFF;
}
.studio-btn--run:hover { background: #047857; }
.studio-btn--submit {
    background: var(--color-primary);
    color: #FFF;
}
.studio-btn--submit:hover { background: var(--color-primary-hover); }
.studio-btn--secondary {
    background: var(--color-bg-tertiary);
    color: var(--color-text);
    border: 1px solid var(--color-border);
}
.studio-btn--secondary:hover { background: var(--color-surface-hover); }
.studio-btn .material-symbols-outlined { font-size: 18px; }

/* ---- Studio Status Bar ---- */
.studio-status {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--space-3);
    height: 24px;
    background: var(--color-bg-secondary);
    border-top: 1px solid var(--color-border);
    flex-shrink: 0;
    font-size: 11px;
    color: var(--color-text-tertiary);
}
.studio-status__left, .studio-status__right {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

/* ---- Studio Dropdowns ---- */
.studio-dropdown {
    position: relative;
}
.studio-dropdown__menu {
    display: none;
    position: absolute;
    top: calc(100% + 4px);
    left: 0;
    min-width: 160px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    z-index: var(--z-dropdown);
    padding: var(--space-1);
}
.studio-dropdown__menu.open { display: block; }
.studio-dropdown__item {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
    font-size: var(--text-sm);
    color: var(--color-text);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: background var(--transition-fast);
}
.studio-dropdown__item:hover { background: var(--color-bg-tertiary); }
.studio-dropdown__item .material-symbols-outlined { font-size: 16px; color: var(--color-text-secondary); }

/* ---- Preview iframe ---- */
.preview-frame {
    width: 100%;
    height: 100%;
    border: none;
    background: #FFF;
}

/* ---- Notebook cells ---- */
.notebook-cell {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    margin: var(--space-2) var(--space-3);
    overflow: hidden;
}
.notebook-cell--active { border-color: var(--color-primary); }
.notebook-cell__toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-1) var(--space-2);
    background: var(--color-bg-secondary);
    border-bottom: 1px solid var(--color-border);
    font-size: var(--text-xs);
    color: var(--color-text-secondary);
}
.notebook-cell__editor {
    min-height: 80px;
}
.notebook-cell__editor textarea {
    width: 100%;
    min-height: 80px;
    padding: var(--space-3);
    font-family: var(--font-mono);
    font-size: var(--text-sm);
    border: none;
    background: var(--color-bg);
    color: var(--color-text);
    resize: vertical;
    outline: none;
}
.notebook-cell__output {
    padding: var(--space-3);
    font-family: var(--font-mono);
    font-size: var(--text-sm);
    background: var(--color-bg-tertiary);
    border-top: 1px solid var(--color-border);
    white-space: pre-wrap;
    min-height: 32px;
}

/* ---- Canvas wrap (Graphic Editor) ---- */
.canvas-wrap {
    flex: 1;
    position: relative;
    overflow: hidden;
    background: #F0F0F0;
    min-height: 0;
}
[data-theme="dark"] .canvas-wrap { background: #2D2D2D; }

/* ---- Graphic Editor Toolbar ---- */
.ge-toolbar {
    display: flex;
    align-items: center;
    gap: var(--space-1);
    padding: var(--space-2) var(--space-3);
    background: var(--color-bg-secondary);
    border-bottom: 1px solid var(--color-border);
    overflow-x: auto;
    flex-shrink: 0;
}
.ge-tool-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: var(--radius-md);
    color: var(--color-text-secondary);
    transition: background var(--transition-fast), color var(--transition-fast);
    flex-shrink: 0;
}
.ge-tool-btn:hover { background: var(--color-bg-tertiary); color: var(--color-text); }
.ge-tool-btn--active { background: var(--color-primary-light); color: var(--color-primary); }
.ge-tool-btn .material-symbols-outlined { font-size: 20px; }
.ge-toolbar__sep {
    width: 1px;
    height: 24px;
    background: var(--color-border);
    margin: 0 var(--space-1);
    flex-shrink: 0;
}

/* ---- Properties Panel (Graphic Editor) ---- */
.ge-props {
    width: 240px;
    background: var(--color-bg-secondary);
    border-left: 1px solid var(--color-border);
    overflow-y: auto;
    flex-shrink: 0;
}
.ge-props__section {
    padding: var(--space-3);
    border-bottom: 1px solid var(--color-border);
}
.ge-props__label {
    font-size: var(--text-xs);
    font-weight: var(--font-semibold);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-2);
}
.ge-props__row {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    margin-bottom: var(--space-2);
}
.ge-props__input {
    flex: 1;
    padding: 4px 8px;
    font-size: var(--text-xs);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: var(--color-bg);
    color: var(--color-text);
}

/* ---- System Design Canvas ---- */
.sd-canvas-area {
    flex: 1;
    position: relative;
    overflow: auto;
    background: var(--color-bg);
    cursor: crosshair;
    min-height: 0;
}

/* ---- System Design Component Palette ---- */
.sd-palette {
    width: 220px;
    background: var(--color-bg-secondary);
    border-right: 1px solid var(--color-border);
    overflow-y: auto;
    flex-shrink: 0;
}
.sd-palette__group {
    padding: var(--space-3);
    border-bottom: 1px solid var(--color-border);
}
.sd-palette__group-label {
    font-size: var(--text-xs);
    font-weight: var(--font-semibold);
    color: var(--color-text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-2);
}
.sd-component {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2);
    font-size: var(--text-sm);
    border-radius: var(--radius-sm);
    cursor: grab;
    transition: background var(--transition-fast);
    margin-bottom: var(--space-1);
}
.sd-component:hover { background: var(--color-bg-tertiary); }
.sd-component .material-symbols-outlined { font-size: 18px; color: var(--color-text-secondary); }

/* ---- AI Studio ---- */
.ai-modes {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: var(--space-3);
    padding: var(--space-4);
}
.ai-mode-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-4);
    cursor: pointer;
    transition: box-shadow var(--transition-base), border-color var(--transition-base);
}
.ai-mode-card:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--color-primary);
}
.ai-mode-card--active {
    border-color: var(--color-primary);
    background: var(--color-primary-light);
}
.ai-mode-card__icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    background: var(--color-primary-light);
    color: var(--color-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-3);
}
.ai-mode-card__icon .material-symbols-outlined { font-size: 22px; }
.ai-mode-card__title {
    font-weight: var(--font-semibold);
    font-size: var(--text-sm);
    margin-bottom: var(--space-1);
}
.ai-mode-card__desc {
    font-size: var(--text-xs);
    color: var(--color-text-secondary);
    line-height: var(--leading-relaxed);
}

/* ---- AI Chat Area ---- */
.ai-chat {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 0;
}
.ai-chat__messages {
    flex: 1;
    overflow-y: auto;
    padding: var(--space-4);
    min-height: 0;
}
.ai-chat__msg {
    max-width: 80%;
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-3);
    font-size: var(--text-sm);
    line-height: var(--leading-relaxed);
}
.ai-chat__msg--user {
    margin-left: auto;
    background: var(--color-primary);
    color: #FFF;
    border-bottom-right-radius: var(--radius-sm);
}
.ai-chat__msg--ai {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-bottom-left-radius: var(--radius-sm);
}
.ai-chat__input-wrap {
    display: flex;
    gap: var(--space-2);
    padding: var(--space-3);
    border-top: 1px solid var(--color-border);
    background: var(--color-bg);
}
.ai-chat__input {
    flex: 1;
    padding: var(--space-3);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: var(--text-sm);
    background: var(--color-bg);
    color: var(--color-text);
    resize: none;
}
.ai-chat__input:focus {
    outline: none;
    border-color: var(--color-primary);
}
.ai-chat__send {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-primary);
    color: #FFF;
    border-radius: var(--radius-md);
    flex-shrink: 0;
    transition: background var(--transition-fast);
}
.ai-chat__send:hover { background: var(--color-primary-hover); }

/* ---- Pyodide Loading Banner ---- */
.pyodide-loading {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
    background: var(--color-info-light);
    color: var(--color-info);
    font-size: var(--text-xs);
    font-weight: var(--font-medium);
    border-bottom: 1px solid var(--color-border);
}

/* ---- Studio Bottom Tabs (Mobile) ---- */
.studio-tabs {
    display: none;
    height: 52px;
    background: var(--color-bg-secondary);
    border-top: 1px solid var(--color-border);
    flex-shrink: 0;
}
.studio-tabs__inner {
    display: flex;
    align-items: stretch;
    height: 100%;
}
.studio-tab {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2px;
    font-size: 10px;
    font-weight: var(--font-medium);
    color: var(--color-text-tertiary);
    cursor: pointer;
    transition: color var(--transition-fast);
}
.studio-tab:hover { color: var(--color-text); }
.studio-tab--active { color: var(--color-primary); }
.studio-tab .material-symbols-outlined { font-size: 20px; }

/* ---- Mobile Studio Layout ---- */
@media (max-width: 768px) {
    .studio-body { flex-direction: column; }
    .studio-panel--left,
    .studio-panel--right {
        flex: none;
        width: 100%;
        border-right: none;
    }
    .studio-panel { display: none; }
    .studio-panel--visible { display: flex; flex: 1; }
    .studio-tabs { display: flex; }

    .ge-props { display: none; width: 100%; }
    .ge-props--visible { display: block; }
    .sd-palette { display: none; width: 100%; }
    .sd-palette--visible { display: block; }

    .ace-editor-container {
        height: calc(100vh - 44px - 52px - 56px - 38px);
    }

    .ai-modes {
        grid-template-columns: repeat(2, 1fr);
    }
    .ai-mode-card { padding: var(--space-3); }
}

@media (max-width: 480px) {
    .ai-modes { grid-template-columns: 1fr; }
}