:root {
    --fp-bg: #e8ecf1;
    --fp-surface: #ffffff;
    --fp-border: rgba(0, 0, 0, 0.1);
    --fp-text: #1a2332;
    --fp-muted: #5a6b7d;
    --fp-accent: #009a46;
    --fp-accent-soft: rgba(0, 154, 70, 0.12);
    --fp-danger: #c62828;
    --fp-plot-line: #2d6aa8;
    --fp-radius: 12px;
    --fp-font: "DM Sans", system-ui, sans-serif;
}

.fp-page {
    font-size: 16px;
    font-family: var(--fp-font);
    color: var(--fp-text);
    line-height: 1.5;
}

.fp-main {
    flex: 1;
}

.fp-container {
    max-width: 880px;
    margin: 0 auto;
    padding: 0 1.25rem 2.5rem;
}

.fp-hero {
    padding: 1.5rem 0 1rem;
}

.fp-badge {
    display: inline-block;
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--fp-accent);
    background: var(--fp-accent-soft);
    padding: 0.25rem 0.6rem;
    border-radius: 999px;
    margin-bottom: 0.5rem;
}

.fp-hero h1 {
    margin: 0 0 0.35rem;
    font-size: clamp(1.5rem, 4vw, 1.85rem);
    font-weight: 700;
    letter-spacing: -0.02em;
}

.fp-lead {
    margin: 0;
    max-width: 40rem;
    color: var(--fp-muted);
    font-size: 0.92rem;
}

.fp-card {
    background: var(--fp-surface);
    border: 1px solid var(--fp-border);
    border-radius: var(--fp-radius);
    padding: 1.15rem 1.2rem 1.25rem;
    margin-bottom: 1.15rem;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.06);
}

.fp-card h2 {
    margin: 0 0 0.85rem;
    font-size: 1rem;
    font-weight: 600;
}

.fp-field-label {
    display: block;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--fp-muted);
    margin-bottom: 0.35rem;
}

.fp-input,
.fp-select {
    width: 100%;
    max-width: 100%;
    padding: 0.55rem 0.65rem;
    border: 1px solid var(--fp-border);
    border-radius: 8px;
    font-family: inherit;
    font-size: 0.9rem;
    box-sizing: border-box;
    margin-bottom: 0.85rem;
}

.fp-input:focus,
.fp-select:focus {
    outline: none;
    border-color: var(--fp-accent);
    box-shadow: 0 0 0 3px var(--fp-accent-soft);
}

.fp-row-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem 1rem;
}

@media (max-width: 520px) {
    .fp-row-2 {
        grid-template-columns: 1fr;
    }
}

.fp-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 0.25rem;
}

.fp-btn {
    font-family: inherit;
    font-size: 0.88rem;
    font-weight: 600;
    padding: 0.55rem 1.1rem;
    border-radius: 8px;
    border: 1px solid var(--fp-border);
    cursor: pointer;
    background: var(--fp-surface);
    color: var(--fp-text);
}

.fp-btn--primary {
    background: var(--fp-accent);
    border-color: #007c39;
    color: #fff;
}

.fp-btn--primary:hover {
    background: #00b04a;
}

.fp-btn--secondary {
    background: #eef1f5;
    color: var(--fp-text);
    border-color: var(--fp-border);
}

.fp-btn--secondary:hover {
    background: #e4e9ef;
}

.fp-btn--ghost {
    background: transparent;
    color: var(--fp-muted);
    border-color: transparent;
}

.fp-btn--ghost:hover {
    background: rgba(0, 0, 0, 0.04);
    color: var(--fp-text);
}

.fp-error {
    color: var(--fp-danger);
    font-size: 0.88rem;
    margin: -0.35rem 0 0.75rem;
    min-height: 1.25em;
}

.fp-plot-wrap {
    width: 100%;
    border: 1px solid var(--fp-border);
    border-radius: var(--fp-radius);
    overflow: hidden;
    background: #fafbfc;
}

.fp-plot-wrap svg {
    display: block;
    width: 100%;
    height: auto;
    vertical-align: middle;
}

.fp-hint {
    font-size: 0.78rem;
    color: var(--fp-muted);
    margin: 0.5rem 0 0;
}

.fp-examples {
    margin: -0.15rem 0 0.85rem;
}

.fp-examples-row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    margin-top: 0.35rem;
}

.fp-chip {
    font-family: inherit;
    font-size: 0.8rem;
    font-weight: 500;
    padding: 0.35rem 0.7rem;
    border-radius: 999px;
    border: 1px solid var(--fp-border);
    background: #f0f3f7;
    color: var(--fp-text);
    cursor: pointer;
    line-height: 1.2;
}

.fp-chip:hover {
    background: #e4e9ef;
    border-color: rgba(0, 0, 0, 0.14);
}

.fp-chip:focus-visible {
    outline: none;
    box-shadow: 0 0 0 3px var(--fp-accent-soft);
    border-color: var(--fp-accent);
}

.fp-options-row {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem 1.25rem;
    align-items: center;
    margin: 0.5rem 0 0.25rem;
    font-size: 0.84rem;
    color: var(--fp-muted);
}

.fp-options-row label {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    cursor: pointer;
    user-select: none;
}

.fp-options-row input[type="checkbox"] {
    width: auto;
    margin: 0;
}

.fp-syntax {
    margin: 0.75rem 0 0;
    font-size: 0.82rem;
    color: var(--fp-muted);
}

.fp-syntax summary {
    cursor: pointer;
    font-weight: 600;
    color: var(--fp-text);
    user-select: none;
}

.fp-syntax ul {
    margin: 0.5rem 0 0;
    padding-left: 1.2rem;
}

.fp-syntax li {
    margin-bottom: 0.25rem;
}

.fp-table-wrap {
    overflow-x: auto;
    border: 1px solid var(--fp-border);
    border-radius: 8px;
    max-height: 220px;
    overflow-y: auto;
}

#resultTable {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.82rem;
}

#resultTable th,
#resultTable td {
    padding: 0.45rem 0.65rem;
    text-align: left;
    border-bottom: 1px solid var(--fp-border);
}

#resultTable th {
    position: sticky;
    top: 0;
    background: #f0f3f7;
    font-weight: 600;
}

#resultTable tbody tr:nth-child(even) {
    background: rgba(0, 0, 0, 0.02);
}

.fp-details {
    margin-top: 0.75rem;
    font-size: 0.82rem;
    color: var(--fp-muted);
}

.fp-details summary {
    cursor: pointer;
    font-weight: 600;
    color: var(--fp-text);
    user-select: none;
}

#debugWindow {
    width: 100%;
    min-height: 100px;
    margin-top: 0.5rem;
    padding: 0.5rem;
    border: 1px solid var(--fp-border);
    border-radius: 8px;
    font-family: ui-monospace, monospace;
    font-size: 0.75rem;
    box-sizing: border-box;
    resize: vertical;
    background: #f8f9fb;
}

#fpToast {
    position: fixed;
    bottom: 1.25rem;
    left: 50%;
    transform: translateX(-50%) translateY(120%);
    background: #2a3340;
    color: #fff;
    padding: 0.65rem 1.1rem;
    border-radius: 8px;
    font-size: 0.88rem;
    font-weight: 500;
    z-index: 3000;
    opacity: 0;
    transition: transform 0.2s ease, opacity 0.2s ease;
    pointer-events: none;
    max-width: min(90vw, 20rem);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.15);
}

#fpToast.fp-toast--visible {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}