/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --color-bg: #1a1a1a;
    --color-bg-light: #2a2a2a;
    --color-bg-lighter: #3a3a3a;
    --color-text: #e0e0e0;
    --color-text-dim: #a0a0a0;
    --color-primary: #4a9eff;
    --color-border: #404040;
    --color-success: #4ade80;
    --color-warning: #fbbf24;

    --signal-high: #4ade80;
    --signal-low: #60a5fa;
    --signal-unknown: #fbbf24;
    --signal-highz: #a78bfa;
    --grid-color: #333;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
        'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    overflow: hidden;
}

/* App container */
.app-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
}

/* Header */
.header {
    background-color: var(--color-bg-light);
    border-bottom: 2px solid var(--color-primary);
    padding: 0.75rem 2rem;
    text-align: center;
    position: relative;
}

.header h1 {
    font-size: 1.5rem;
    margin-bottom: 0.1rem;
    color: var(--color-primary);
}

.subtitle {
    font-size: 0.8rem;
    color: var(--color-text-dim);
}

/* Main content area - horizontal split */
.main-content {
    display: flex;
    flex-direction: column;
    flex: 1;
    overflow: hidden;
}

/* Panes */
.pane {
    display: flex;
    flex-direction: column;
    background-color: var(--color-bg-light);
    overflow: hidden;
}

/* Waveform pane takes more space */
.waveform-pane {
    flex: 1;
    border-bottom: 1px solid var(--color-border);
}

/* Text editor pane */
.text-pane {
    flex: 0 0 200px;
    min-height: 150px;
}

.pane-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 1rem;
    background-color: var(--color-bg-lighter);
    border-bottom: 1px solid var(--color-border);
}

.pane-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-text);
    margin-right: 1rem;
}

.pane-content {
    flex: 1;
    overflow: hidden;
    position: relative;
}

/* Toolbar */
.toolbar {
    display: flex;
    gap: 0.5rem;
}

.toolbar-left {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.btn {
    padding: 0.35rem 0.7rem;
    background-color: var(--color-bg);
    color: var(--color-text);
    border: 1px solid var(--color-border);
    border-radius: 4px;
    font-size: 0.8rem;
    cursor: pointer;
    transition: all 0.2s;
}

.btn:hover {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
    color: white;
}

.btn:active {
    transform: translateY(1px);
}

/* Text editor */
.text-editor {
    width: 100%;
    height: 100%;
    padding: 1rem;
    background-color: var(--color-bg);
    color: var(--color-text);
    border: none;
    font-family: 'Courier New', 'Consolas', monospace;
    font-size: 0.9rem;
    line-height: 1.5;
    resize: none;
    outline: none;
}

.text-editor::placeholder {
    color: var(--color-text-dim);
    opacity: 0.6;
}

/* Canvas container */
.canvas-container {
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: var(--color-bg);
    position: relative;
}

#waveformCanvas {
    display: block;
    cursor: crosshair;
}

/* Help text */
.help-text {
    color: var(--color-text-dim);
    font-size: 0.75rem;
}

/* Bottom bar */
.bottom-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 1rem;
    background-color: var(--color-bg-lighter);
    border-top: 1px solid var(--color-border);
}

/* Theme toggle button positioning */
.theme-toggle {
    position: absolute;
    right: 2rem;
    top: 50%;
    transform: translateY(-50%);
}

/* Scrollbar styling */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--color-bg-lighter);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-border);
}

/* Light mode styles - black on white, no colors */
.light-mode {
    --color-bg: #ffffff;
    --color-bg-light: #f5f5f5;
    --color-bg-lighter: #e8e8e8;
    --color-text: #000000;
    --color-text-dim: #555555;
    --color-primary: #000000;
    --color-border: #cccccc;

    /* All signals are black in light mode */
    --signal-high: #000000;
    --signal-low: #000000;
    --signal-unknown: #000000;
    --signal-highz: #000000;
    --grid-color: #dddddd;
}

/* Light mode specific overrides */
.light-mode .header {
    border-bottom-color: #000000;
}

.light-mode .header h1 {
    color: #000000;
}

.light-mode .btn:hover {
    background-color: #000000;
    border-color: #000000;
}

.light-mode ::-webkit-scrollbar-track {
    background: #f5f5f5;
}

.light-mode ::-webkit-scrollbar-thumb {
    background: #cccccc;
}

.light-mode ::-webkit-scrollbar-thumb:hover {
    background: #999999;
}

/* Responsive design - smaller screens */
@media (max-width: 768px) {
    .header h1 {
        font-size: 1.2rem;
    }

    .subtitle {
        display: none;
    }

    .theme-toggle {
        right: 1rem;
    }

    .pane-header {
        flex-wrap: wrap;
        gap: 0.5rem;
    }

    .toolbar-left {
        flex-wrap: wrap;
    }

    .text-pane {
        flex: 0 0 150px;
        min-height: 120px;
    }
}