:root {
    --bg-color: #ffffff;
    --panel-bg: #e8eaed;
    --border-color: #d1d5da;
    --text-primary: #24292f;
    --text-secondary: #57606a;
    --accent-color: #0969da;
    --accent-hover: #0550ae;
    --error-color: #cf222e;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
    --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg-color);
    color: var(--text-primary);
    height: 100vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.current-epoch-centered {
    text-align: center;
    padding: 20px 0 40px 0;
}

.epoch-label {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 12px;
    font-weight: 500;
}

.epoch-hero-value {
    font-family: var(--font-mono);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--accent-color);
    letter-spacing: -0.02em;
}

main {
    flex: 1;
    overflow-y: auto;
    padding: 32px 24px;
    display: flex;
    flex-direction: column;
    gap: 32px;
    max-width: 900px;
    margin: 0 auto;
    width: 100%;
}

.converter-card {
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 24px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.card-title {
    font-size: 0.85rem;
    font-weight: 600;
    color: #000000;
    margin-bottom: 20px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.input-group {
    display: flex;
    gap: 12px;
    align-items: center;
    margin-bottom: 20px;
}

.input-group label {
    font-size: 0.85rem;
    font-weight: 500;
    white-space: nowrap;
    width: 120px;
}

input {
    flex: 1;
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 0.9rem;
    font-family: var(--font-mono);
    outline: none;
    transition: border-color 0.2s;
}

input:focus {
    border-color: var(--accent-color);
}

.btn-convert {
    padding: 8px 16px;
    background-color: var(--accent-color);
    color: #fff;
    border: none;
    border-radius: 6px;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s;
}

.btn-convert:hover {
    background-color: var(--accent-hover);
}

.result-area {
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px dashed var(--border-color);
}

.result-row {
    display: flex;
    gap: 12px;
    margin-bottom: 8px;
    font-size: 0.9rem;
}

.result-label {
    color: #000000;
    width: 120px;
    font-weight: 600;
}

.result-val {
    font-family: var(--font-mono);
    font-weight: 400;
    word-break: break-all;
}

.status-bar {
    height: 28px;
    padding: 0 24px;
    background-color: var(--panel-bg);
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.footer-stats {
    font-weight: 500;
    color: var(--text-primary);
}