@import url('https://fonts.googleapis.com/css2?family=Fira+Code:wght@400;500&family=Inter:wght@400;500;600;700&display=swap');

:root {
    --bg-dark: #0d1117;
    --bg-panel: #161b22;
    --border-color: #30363d;
    --text-primary: #c9d1d9;
    --text-secondary: #8b949e;
    --text-white: #f0f6fc;
    --accent-blue: #58a6ff;
    --accent-green: #3fb950;
    --accent-red: #f85149;
    --font-sans: 'Inter', sans-serif;
    --font-mono: 'Fira Code', monospace;
}

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

body {
    background-color: var(--bg-dark);
    color: var(--text-primary);
    font-family: var(--font-sans);
    height: 100vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

header {
    background-color: var(--bg-panel);
    border-bottom: 1px solid var(--border-color);
    padding: 0.45rem 1.25rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 10;
}

.logo-container {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo-icon {
    width: 1.8rem;
    height: 1.8rem;
    background-color: var(--accent-blue);
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--bg-dark);
    font-weight: 700;
    font-size: 1.1rem;
}

h1 {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-white);
}

.header-controls {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

select {
    background-color: #21262d;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: 0.35rem 0.75rem;
    border-radius: 6px;
    font-family: var(--font-sans);
    font-size: 0.82rem;
    cursor: pointer;
    outline: none;
    transition: background-color 0.2s, border-color 0.2s;
}

select:hover {
    background-color: #30363d;
    border-color: #8b949e;
}

button {
    background-color: #21262d;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: 0.35rem 0.85rem;
    border-radius: 6px;
    font-family: var(--font-sans);
    font-weight: 500;
    font-size: 0.82rem;
    cursor: pointer;
    outline: none;
    transition: background-color 0.2s, border-color 0.2s, color 0.2s;
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

button:hover {
    background-color: #30363d;
    border-color: #8b949e;
    color: var(--text-white);
}

button.primary {
    background-color: var(--accent-green);
    color: var(--text-white);
    border: 1px solid rgba(240, 246, 252, 0.1);
    font-weight: 600;
}

button.primary:hover {
    background-color: #2ea043;
    color: var(--text-white);
    border-color: rgba(240, 246, 252, 0.2);
}

button:disabled {
    opacity: 0.35;
    cursor: not-allowed;
    background-color: #21262d !important;
    border-color: var(--border-color) !important;
    color: var(--text-secondary) !important;
}

main {
    flex: 1;
    display: grid;
    grid-template-columns: 1fr 1.35fr;
    padding: 0.5rem;
    gap: 0.5rem;
    width: 100%;
    height: calc(100vh - 45px);
    min-height: 0;
    overflow: hidden;
}

.panel {
    background-color: var(--bg-panel);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.panel-header {
    background-color: #1f242c;
    border-bottom: 1px solid var(--border-color);
    padding: 0.35rem 0.75rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.panel-title {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.editor-container {
    flex: 1;
    position: relative;
    min-height: 0;
}

#editor {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
}

.output-container {
    display: flex;
    flex-direction: column;
    height: 100%;
}

.tab-btn {
    padding: 0.5rem 1.25rem;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: all 0.2s ease;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

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

.tab-btn.active {
    color: var(--text-white);
    border-bottom-color: var(--accent-blue);
    background-color: rgba(88, 166, 255, 0.05);
}

.tab-content {
    display: none;
    flex: 1;
    min-height: 0;
    position: relative;
    overflow: hidden;
}

.tab-content.active {
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.console-output {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #0d1117;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    padding: 1rem;
    overflow-y: auto;
    color: var(--text-primary);
    white-space: pre-wrap;
    line-height: 1.4;
}

.tui-terminal {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #0d1117;
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 0.85rem;
    padding: 0.35rem;
    overflow: hidden;
    line-height: 1.4;
    display: flex;
    flex-direction: column;
}

.tui-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr 1fr;
    grid-template-rows: 1fr 1fr auto;
    grid-template-areas: 
        "source bytecode variables"
        "source bytecode stack"
        "controls controls controls";
    gap: 0.35rem;
    height: 100%;
    min-height: 0;
    flex: 1;
}

.tui-card {
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 0.35rem;
    background-color: var(--bg-panel);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    min-height: 0;
}

.tui-card:nth-child(1) { grid-area: source; }
.tui-card:nth-child(2) { grid-area: bytecode; }
.tui-card:nth-child(3) { grid-area: variables; }
.tui-card:nth-child(4) { grid-area: stack; }
.tui-debugger-controls { grid-area: controls; }

.tui-card-title {
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--accent-blue);
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.2rem;
    margin-bottom: 0.4rem;
}

.tui-card-content {
    flex: 1;
    overflow-y: auto;
    white-space: pre;
    font-size: 0.85rem;
}

.tui-line-active {
    background-color: #1f242c;
    border-left: 2px solid var(--accent-blue);
    color: var(--text-white);
    font-weight: 500;
    padding-left: 3px;
}

.tui-inst-active {
    background-color: #1b241c;
    border-left: 2px solid var(--accent-green);
    color: var(--text-white);
    font-weight: 500;
    padding-left: 3px;
}

.tui-debugger-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 0.4rem 0.75rem;
    background-color: var(--bg-panel);
}

.tui-debugger-buttons {
    display: flex;
    gap: 0.4rem;
}

.tui-debugger-buttons button {
    padding: 0.2rem 0.6rem;
    font-size: 0.75rem;
}

#tui-ip-display {
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 0.8rem;
}

::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: var(--bg-dark);
}

::-webkit-scrollbar-thumb {
    background: #30363d;
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: #8b949e;
}