:root {
    --bg: #0f172a;
    --panel: #020617;
    --text: #e5e7eb;
    --border: #1e293b;
    --border-2: #334155;
    --accent: #38bdf8;
    --accent-hover: #0ea5e9;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
    --r: 12px;
    --r2: 10px;
    --sans: system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
    --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
    --content-width: 800px;
    --body-margin-top: 40px;
    --h1-size: 40px;
    --h1-margin: 0 0 24px;
    --section-padding: 20px;
    --section-radius: 12px;
    --result-padding: 12px;
    --result-margin-top: 12px;
}

*, *::before, *::after {
    box-sizing: border-box;
}

body {
    font-family: var(--sans);
    background: var(--bg);
    color: var(--text);
    max-width: var(--content-width);
    margin: var(--body-margin-top) auto;
    padding: 0 16px;
}

h1 {
    text-align: center;
    margin: var(--h1-margin);
    font-size: var(--h1-size);
    letter-spacing: 0.5px;
}

.logo-mark {
    height: 1em;
    width: auto;
    vertical-align: -0.12em;
    margin-right: 0.35em;
}

section {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: var(--section-radius);
    padding: var(--section-padding);
    margin-bottom: 24px;
    box-shadow: var(--shadow);
}

.actions {
    display: flex;
    gap: 12px;
    align-items: center;
    margin-top: 12px;
    flex-wrap: wrap;
}

button {
    padding: 10px 16px;
    background: var(--accent);
    border: none;
    border-radius: var(--r2);
    cursor: pointer;
    font-weight: 700;
    color: #001018;
}

button:hover {
    background: var(--accent-hover);
}

button:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

.result {
    margin-top: var(--result-margin-top);
    padding: var(--result-padding);
    border-radius: var(--r2);
    white-space: pre-wrap;
    overflow-wrap: anywhere;
    word-break: break-word;
    line-height: 1.35;
    min-height: 1px;
}

.success {
    background: #022c22;
    border: 1px solid #064e3b;
    color: #bbf7d0;
}

.error {
    background: #3f1d1d;
    border: 1px solid #7f1d1d;
    color: #fecaca;
}

.hint {
    opacity: 0.7;
    font-size: 14px;
    margin-top: 8px;
}

footer {
    margin-top: 40px;
    padding-bottom: 16px;
    text-align: center;
}

.footer-inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 14px;
}

.footer-text {
    opacity: 0.7;
    font-size: 14px;
}

.source-link {
    font-size: 15px;
    font-weight: 700;
    color: var(--accent);
    text-decoration: none;
    padding: 6px 14px;
    border-radius: 999px;
    border: 1px solid var(--border-2);
    background: rgba(2, 6, 23, 0.4);
    transition: all 120ms ease;
}

.source-link:hover {
    background: rgba(56, 189, 248, 0.15);
    border-color: var(--accent);
    color: #7dd3fc;
    transform: translateY(-1px);
}