:root {
    --background: #f8fafc;
    --surface: #ffffff;
    --text: #172033;
    --muted: #64748b;
    --accent: #2563eb;
    --border: #e2e8f0;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background: var(--background);
    color: var(--text);
    font-family: system-ui, -apple-system, BlinkMacSystemFont,
                 "Segoe UI", sans-serif;
    line-height: 1.6;
}

.container {
    max-width: 960px;
    margin: 0 auto;
    padding: 100px 24px;
    text-align: center;
}

.brand {
    color: var(--accent);
    font-size: 1.25rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    margin-bottom: 36px;
}

h1 {
    font-size: clamp(2rem, 5vw, 3.5rem);
    line-height: 1.15;
    letter-spacing: -1.5px;
    margin: 0 0 24px;
}

.subtitle {
    color: var(--muted);
    font-size: 1.125rem;
    max-width: 560px;
    margin: 0 auto 48px;
}

.status {
    display: inline-block;
    padding: 12px 24px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 10px;
    color: var(--muted);
    font-size: 0.875rem;
}

@media (max-width: 600px) {
    .container {
        padding: 72px 20px;
    }
}


/* Shared StraightCalc calculator layout */

.tool-header {
    background: #fff;
    border-bottom: 1px solid var(--border);
}

.tool-header-inner {
    max-width: 1100px;
    margin: auto;
    padding: 18px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
}

.tool-logo {
    color: var(--accent);
    font-size: 1.4rem;
    font-weight: 800;
    text-decoration: none;
}

.tool-header nav {
    display: flex;
    gap: 20px;
}

.tool-header nav a {
    color: var(--text);
    text-decoration: none;
}

.tool-shell {
    max-width: 1100px;
    margin: 0 auto;
    padding: 40px 24px 80px;
}

.tool-intro {
    margin-bottom: 30px;
}

.tool-intro h1 {
    font-size: clamp(2rem, 4vw, 2.8rem);
    margin-bottom: 12px;
}

.tool-intro p,
.tool-help {
    color: var(--muted);
}

.tool-layout {
    display: grid;
    grid-template-columns: minmax(0, 1.65fr) minmax(0, 1fr);
    gap: 24px;
    align-items: start;
}

.tool-primary {
    display: grid;
    gap: 20px;
    min-width: 0;
}

.tool-card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 24px;
}

.tool-card h2 {
    font-size: 1.2rem;
    margin: 0 0 20px;
}

.tool-grid,
.tool-results-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.tool-field {
    margin-bottom: 16px;
    min-width: 0;
}

.tool-field label {
    display: block;
    font-weight: 600;
    margin-bottom: 6px;
    font-size: 0.9rem;
}

.tool-field input,
.tool-field select {
    width: 100%;
    max-width: 100%;
    padding: 12px;
    border: 1px solid #cbd5e1;
    border-radius: 8px;
    background: #fff;
    color: var(--text);
    font: inherit;
}

.tool-field input:focus,
.tool-field select:focus {
    outline: 2px solid var(--accent);
    outline-offset: 1px;
}

.tool-button,
.tool-button-secondary {
    display: inline-block;
    width: 100%;
    padding: 12px 16px;
    border-radius: 8px;
    font: inherit;
    font-weight: 600;
    cursor: pointer;
}

.tool-button {
    background: var(--accent);
    color: #fff;
    border: 1px solid var(--accent);
}

.tool-button-secondary {
    background: #fff;
    color: var(--accent);
    border: 1px solid var(--accent);
}

.tool-button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.tool-result {
    background: #f1f5f9;
    padding: 18px;
    border-radius: 10px;
}

.tool-result span {
    display: block;
    color: var(--muted);
    font-size: 0.85rem;
}

.tool-result strong {
    display: block;
    font-size: 1.6rem;
    margin-top: 5px;
    overflow-wrap: anywhere;
}

.tool-divider {
    border: 0;
    border-top: 1px solid var(--border);
    margin: 24px 0;
}

.tool-message {
    font-size: 0.9rem;
}

.tool-message:empty {
    display: none;
}

.tool-warning {
    font-size: 0.8rem;
    color: #92400e;
    background: #fffbeb;
    border-radius: 8px;
    padding: 12px;
}

.tool-footer {
    text-align: center;
    padding: 24px;
    color: var(--muted);
    border-top: 1px solid var(--border);
    font-size: 0.85rem;
}

@media (max-width: 800px) {
    .tool-layout {
        grid-template-columns: 1fr;
    }

    .tool-shell {
        padding: 28px 16px 60px;
    }
}

@media (max-width: 480px) {
    .tool-grid,
    .tool-results-grid {
        grid-template-columns: 1fr;
    }

    .tool-card {
        padding: 18px;
    }

    .tool-header-inner {
        padding: 16px;
    }
}