:root {
    --background: hsl(0 0% 3.9%);
    --foreground: hsl(0 0% 98%);
    --card: hsl(0 0% 12%);
    --card-foreground: hsl(0 0% 98%);
    --popover: hsl(0 0% 3.9%);
    --popover-foreground: hsl(0 0% 98%);
    --primary: hsl(0 0% 98%);
    --primary-foreground: hsl(0 0% 9%);
    --secondary: hsl(0 0% 14.9%);
    --secondary-foreground: hsl(0 0% 98%);
    --muted: hsl(0 0% 14.9%);
    --muted-foreground: hsl(0 0% 63.9%);
    --accent: hsl(0 0% 14.9%);
    --accent-foreground: hsl(0 0% 98%);
    --border: hsl(0 0% 14.9%);
    --input: hsl(0 0% 14.9%);
    --ring: hsl(0 0% 83.1%);
    --radius: 0.5rem;
}

body {
    background-color: var(--background);
    color: var(--foreground);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    margin: 0;
    padding: 2rem;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.header {
    text-align: center;
}
.header-title {
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin: 0;
}
.header-subtitle {
    color: var(--muted-foreground);
    font-size: 1rem;
    margin-top: 0.25rem;
}

.card {
    background-color: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
}

.controls {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}
.control-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}
label {
    font-size: 0.875rem;
    font-weight: 500;
}
.input-base {
    background-color: var(--background);
    border: 1px solid var(--border);
    border-radius: calc(var(--radius) - 2px);
    color: var(--foreground);
    padding: 0.5rem 0.75rem;
    height: 2.5rem;
}
select.input-base {
    -webkit-appearance: none;
    appearance: none;
    padding-right: 2rem;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='none' stroke='hsl(0 0% 63.9%)' stroke-linecap='round' stroke-linejoin='round' stroke-width='2'%3e%3cpath d='M2 5l6 6 6-6'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 0.5rem center;
    background-size: 1em 1em;
}

.generate-action {
    border-top: 1px solid var(--border);
    padding-top: 1.5rem;
    text-align: right;
}
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: calc(var(--radius) - 2px);
    font-size: 0.875rem;
    font-weight: 600;
    padding: 0.5rem 1rem;
    transition: all 0.2s;
    cursor: pointer;
    border: none;
}
.btn-primary {
    background-color: var(--primary);
    color: var(--primary-foreground);
}
.btn-primary:hover {
    background-color: hsl(0 0% 98% / 0.9);
}

.editor-wrapper {
    position: relative;
    padding: 0;
}
#editor, #suggestion-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    box-sizing: border-box;
    font-family: 'SF Mono', 'Fira Code', 'Courier New', monospace;
    font-size: 1rem;
    line-height: 1.7;
    background-color: transparent;
    border: none;
    overflow: hidden;
    resize: none;
    padding: 1.5rem;
    min-height: 300px;
}
#editor {
    z-index: 2;
    color: var(--foreground);
}
#editor:focus { outline: none; }
#editor::placeholder { color: var(--muted-foreground); }

#suggestion-overlay {
    z-index: 1;
    color: var(--muted-foreground);
    pointer-events: none;
}

.status-bar {
    text-align: center;
    font-size: 0.8rem;
    color: var(--muted-foreground);
    display: flex;
    gap: 0.5rem;
    justify-content: center;
}
#status.fetching {
    color: var(--foreground);
}