/* ========== CSS VARIABLES ========== */
:root {
    --background: 240 10% 3.9%;
    --foreground: 0 0% 98%;
    --card: 240 10% 4.5%;
    --card-border: 240 3.7% 18%;
    --primary: 0 0% 98%;
    --primary-foreground: 240 5.9% 10%;
    --secondary: 240 3.7% 15.9%;
    --secondary-foreground: 0 0% 98%;
    --muted: 240 3.7% 15.9%;
    --muted-foreground: 240 5% 64.9%;
    --accent: 240 3.7% 15.9%;
    --accent-foreground: 0 0% 98%;
    --border: 240 3.7% 18%;
    --input: 240 3.7% 18%;
    --ring: 240 5.9% 85%;
    --radius: 0.625rem;
}

/* ========== GLOBAL STYLES ========== */
.gradio-container {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: hsl(var(--background)) !important;
    color: hsl(var(--foreground));
}

.gradio-container mark {
    background: hsl(var(--accent) / 0.6);
    color: hsl(var(--accent-foreground));
    padding: 0.15em 0.35em;
    border-radius: calc(var(--radius) - 2px);
    font-weight: 500;
    border: 1px solid hsl(var(--border) / 0.5);
}

footer { display: none !important; }

/* ========== MARKDOWN ========== */
.gradio-markdown {
    color: hsl(var(--foreground)) !important;
    font-size: 0.9375rem !important;
    line-height: 1.6 !important;
}

.gradio-markdown:first-child {
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid hsl(var(--border));
}

.gradio-markdown:last-child {
    padding-top: 1.5rem;
    border-top: 1px solid hsl(var(--border));
    color: hsl(var(--muted-foreground)) !important;
}

.gradio-markdown a {
    color: hsl(var(--foreground)) !important;
    text-decoration: none;
    border-bottom: 1px solid hsl(var(--border));
    transition: border-color 0.2s ease;
}

.gradio-markdown a:hover {
    border-color: hsl(var(--ring));
}

/* ========== LAYOUT ========== */
.main-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

@media (max-width: 768px) {
    .main-grid { grid-template-columns: 1fr; }
}

/* ========== CARDS ========== */
.card {
    background: hsl(var(--card));
    border: 1px solid hsl(var(--card-border));
    border-radius: var(--radius);
    padding: 1.5rem;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 0 0 1px rgba(255, 255, 255, 0.02) inset;
}

/* ========== FORM ELEMENTS ========== */
.form-label {
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
    display: block;
    color: hsl(var(--foreground));
}

.input-textarea {
    width: 100%;
    min-height: 140px;
    padding: 0.875rem;
    font-size: 0.9375rem;
    line-height: 1.6;
    background: hsl(var(--background));
    border: 1px solid hsl(var(--input));
    border-radius: var(--radius);
    color: hsl(var(--foreground));
    transition: all 0.2s ease;
    resize: vertical;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

.input-textarea::placeholder {
    color: hsl(var(--muted-foreground) / 0.7);
}

.input-textarea:focus {
    outline: none;
    border-color: hsl(var(--ring));
    box-shadow: 0 0 0 3px hsl(var(--ring) / 0.1), 0 1px 2px rgba(0, 0, 0, 0.2);
    background: hsl(var(--background) / 0.8);
}

/* ========== BUTTONS ========== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-size: 0.9375rem;
    font-weight: 500;
    padding: 0.625rem 1.25rem;
    border-radius: var(--radius);
    cursor: pointer;
    transition: all 0.2s ease;
    border: none;
}

.btn:focus-visible {
    outline: none;
    box-shadow: 0 0 0 2px hsl(var(--background)), 0 0 0 4px hsl(var(--ring));
}

.btn-primary {
    background: hsl(var(--primary));
    color: hsl(var(--primary-foreground));
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.2), 0 0 0 1px rgba(255, 255, 255, 0.05) inset;
}

.btn-primary:hover {
    opacity: 0.95;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.25), 0 0 0 1px rgba(255, 255, 255, 0.08) inset;
}

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

.btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-secondary {
    background: hsl(var(--secondary));
    color: hsl(var(--secondary-foreground));
    border: 1px solid hsl(var(--border));
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

.btn-secondary:hover {
    background: hsl(var(--secondary) / 0.8);
    border-color: hsl(var(--muted-foreground) / 0.5);
}

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

/* ========== OUTPUT CONTAINER ========== */
.output-container {
    min-height: 140px;
    padding: 0.875rem;
    border: 1px solid hsl(var(--input));
    border-radius: var(--radius);
    background: hsl(var(--background));
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.15), 0 0 0 1px rgba(255, 255, 255, 0.02) inset;
}

.output-text {
    color: hsl(var(--foreground));
    font-size: 0.9375rem;
    line-height: 1.75;
    margin: 0;
}

.placeholder-text {
    color: hsl(var(--muted-foreground));
}

.highlight-keyword {
    background: hsl(var(--accent) / 0.6);
    color: hsl(var(--accent-foreground));
    padding: 0.15em 0.35em;
    border-radius: calc(var(--radius) - 2px);
    font-weight: 500;
    border: 1px solid hsl(var(--border) / 0.5);
}

/* ========== EXAMPLES ========== */
.examples-section {
    padding: 1.5rem;
    background: hsl(var(--card));
    border: 1px solid hsl(var(--card-border));
    border-radius: var(--radius);
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.2), 0 0 0 1px rgba(255, 255, 255, 0.02) inset;
}

/* ========== SPACING UTILITIES ========== */
.mt-6 { margin-top: 1.5rem; }
.flex { display: flex; }
.gap-2 { gap: 0.5rem; }