:root {
    --bg: #f9fafb;
    --surface: #ffffff;
    --border: #e5e7eb;
    --ink: #111827;
    --muted: #6b7280;
    --primary: #374151;
    --accent: #059669;
    --danger: #dc2626;
    --warning: #d97706;
    --code-bg: #f3f4f6;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
    --sapienza: #822433;
    --sapienza-soft: rgba(130, 36, 51, 0.05);
}

body {
    margin: 0;
    background-color: var(--bg);
    color: var(--ink);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    overflow-x: hidden;
}

.container {
    width: 100%;
    max-width: 900px;
    padding: 40px 20px;
    animation: fadeIn 0.8s ease-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.intro { margin-bottom: 48px; text-align: center; }
.intro h2 { 
    font-size: 2.5rem; 
    font-weight: 800; 
    letter-spacing: -0.04em; 
    margin: 0; 
    background: linear-gradient(180deg, var(--ink) 0%, var(--muted) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
.intro p { color: var(--muted); font-size: 1.1rem; margin-top: 12px; }

.panel {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 32px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    margin-bottom: 24px;
    width: 100%;
    overflow: hidden;
}

.grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    margin-bottom: 32px;
    width: 100%;
}

label { display: block; min-width: 0; }
label span {
    display: block;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: 8px;
    letter-spacing: 0.1em;
}

input, .custom-select-button {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--ink);
    padding: 14px;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
    transition: all 0.2s ease;
}

input:focus {
    border-color: var(--primary);
    outline: none;
    box-shadow: 0 0 0 3px rgba(55, 65, 81, 0.1);
}

input.is-valid { border-color: var(--accent) !important; }
input.is-invalid { border-color: var(--danger) !important; background: rgba(220, 38, 38, 0.05) !important; }

.field-warning {
    display: none;
    margin-top: 8px;
    color: var(--danger);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 600;
}
.field-warning.visible { display: block; }

.primary {
    width: 100%;
    padding: 16px;
    border-radius: 8px;
    border: none;
    background: var(--primary);
    color: var(--surface);
    font-weight: 700;
    font-size: 1rem;
    cursor: pointer;
    transition: transform 0.1s ease, opacity 0.2s ease;
}
.primary:hover { opacity: 0.9; }
.primary:active { transform: scale(0.98); }

.result-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.result-header h2 {
    margin: 0;
}

pre {
    background: var(--code-bg);
    border: 1px solid var(--border);
    padding: 24px;
    border-radius: 12px;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    line-height: 1.6;
    color: var(--primary);
    position: relative;
    overflow-x: auto;
}

#status-label {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    padding: 6px 12px;
    border-radius: 4px;
    border: 1px solid var(--border);
    background: var(--bg);
    color: var(--muted);
}

.state-success { color: var(--accent) !important; border-color: var(--accent) !important; background: rgba(5, 150, 105, 0.05) !important; }
.state-danger { color: var(--danger) !important; border-color: var(--danger) !important; background: rgba(220, 38, 38, 0.05) !important; }
.state-running { color: var(--warning) !important; border-color: var(--warning) !important; background: rgba(217, 119, 6, 0.05) !important; }

.native-select-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    margin: 0;
    padding: 0;
    overflow: hidden;
    opacity: 0;
    pointer-events: none;
}

.custom-select { position: relative; }
.custom-select-button { cursor: pointer; display: flex; align-items: center; justify-content: space-between; }
.custom-select-arrow {
    width: 0; height: 0; 
    border-left: 5px solid transparent;
    border-right: 5px solid transparent;
    border-top: 5px solid var(--muted);
    transition: transform 0.2s ease;
}
.custom-select.open .custom-select-arrow { transform: rotate(180deg); }

.custom-select-menu {
    position: absolute;
    top: calc(100% + 8px);
    left: 0; right: 0;
    z-index: 50;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 8px;
    box-shadow: 0 10px 15px -3px rgba(0,0,0,0.1);
    display: none;
    padding: 6px;
}
.custom-select.open .custom-select-menu { display: block; animation: select-open 0.14s ease-out; }

@keyframes select-open {
    from { opacity: 0; transform: translateY(-4px); }
    to { opacity: 1; transform: translateY(0); }
}

.custom-select-option {
    width: 100%;
    padding: 10px;
    border: none;
    background: none;
    text-align: left;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--ink);
    border-radius: 4px;
    cursor: pointer;
}
.custom-select-option:hover { background: var(--bg); }
.custom-select-option.selected { background: var(--primary); color: var(--surface); }

.no-spinner { appearance: textfield; }
.no-spinner::-webkit-inner-spin-button { display: none; }