/* 
  JShell Core Theme
  A minimal, local-first theme designed for AI-generated developer tools.
  Focus: Readability, Dark Mode, and Simple Structural Layout.
*/

:root {
    --color-bg: #0d0d0d;
    --color-header: #141414;
    --color-surface: #0d0d0d;
    --color-surface-hover: #1a1a1a;
    --color-border: #222222;
    --color-text-main: #e0e0e0;
    --color-text-muted: #777777;
    --color-accent: #ffffff;
    --color-accent-blue: #3b82f6;
    --color-success: #00ff88;
}

body.light-theme {
    --color-bg: #ffffff;
    --color-header: #f9f9f9;
    --color-surface: #ffffff;
    --color-surface-hover: #f5f5f5;
    --color-border: #eaeaea;
    --color-text-main: #171717;
    --color-text-muted: #666666;
    --color-accent: #000000;
    --color-accent-blue: #2563eb;
    --color-success: #10b981;
}

* { box-sizing: border-box; }

html, body {
    margin: 0;
    padding: 0;
    height: 100%;
    background-color: var(--color-bg);
    color: var(--color-text-main);
    font-family: 'Inter', -apple-system, sans-serif;
    overflow: hidden;
}

/* Tool Layout (Header + Flex Container) */
.tool-header {
    background: var(--color-header);
    border-bottom: 1px solid var(--color-border);
    padding: 8px 16px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 45px;
    z-index: 50;
}

.tool-title { font-weight: 800; font-size: 14px; letter-spacing: -0.02em; }
.back-link { text-decoration: none; color: var(--color-text-muted); font-size: 12px; }
.back-link:hover { color: var(--color-text-main); }

.tool-container {
    display: flex;
    height: calc(100vh - 45px); 
}

.editor-pane, .output-pane {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.editor-pane { border-right: 1px solid var(--color-border); }

.pane-label {
    padding: 4px 16px;
    font-size: 10px;
    font-weight: 800;
    color: var(--color-text-muted);
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    display: flex;
    justify-content: space-between;
    align-items: center;
    min-height: 28px;
}

/* UI Action Buttons (Compact icons + text) */
.ui-action-btn {
    background: transparent;
    border: 1px solid transparent;
    color: var(--color-text-muted);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 9px;
    font-weight: 700;
    text-transform: uppercase;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    transition: all 0.15s ease;
}

.ui-action-btn:hover {
    color: var(--color-text-main);
    background: var(--color-surface-hover);
    border-color: var(--color-border);
}

.ui-action-btn svg {
    width: 11px;
    height: 11px;
    stroke-width: 2.5;
}

/* Common Components */
textarea, input, .monospace {
    font-family: 'JetBrains Mono', 'Fira Code', monospace;
    font-variant-ligatures: none;
}

textarea, input {
    background: #000;
    color: #fff;
    border: none;
    outline: none;
    font-size: 13px;
}

textarea {
    flex-grow: 1;
    padding: 16px;
    resize: none;
    line-height: 1.5;
}

body.light-theme textarea, body.light-theme input { background: #fff; color: #000; }

.btn {
    background: var(--color-surface-hover);
    border: 1px solid var(--color-border);
    color: var(--color-text-main);
    padding: 4px 12px;
    border-radius: 6px;
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.1s;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
}

.btn:hover { border-color: var(--color-text-muted); background: var(--color-border); }
.btn.primary { background: var(--color-accent); color: var(--color-bg); border-color: var(--color-accent); }
.btn.primary:hover { opacity: 0.9; }

.text-success { color: var(--color-success) !important; border-color: var(--color-success) !important; }

/* Utilities */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.gap-2 { gap: 8px; }
.p-4 { padding: 16px; }
.overflow-auto { overflow: auto; }
.hidden { display: none; }