:root {
    --bg-color: #ffffff;
    --text-main: #1a1a1a;
    --text-muted: #707070;
    --border-color: #eee;
    --card-bg: #f8f9ff;
    --accent-color: #000;
    --font-family: 'Outfit', -apple-system, BlinkMacSystemFont, sans-serif;
}

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

body {
    font-family: var(--font-family);
    background-color: var(--bg-color);
    color: var(--text-main);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 60px 40px;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 80px;
}

h1 {
    font-size: 56px;
    font-weight: 400;
    line-height: 1.1;
    letter-spacing: -0.02em;
}

.header-right {
    display: flex;
    gap: 12px;
}

.btn {
    text-decoration: none;
    color: var(--text-main);
    font-size: 16px;
    padding: 12px 24px;
    border-radius: 30px;
    border: 1px solid #e0e0e0;
    transition: all 0.2s ease;
}

.btn:hover {
    background-color: #f5f5f5;
    border-color: #d0d0d0;
}

main {
    margin-top: 40px;
}

.table-header {
    display: grid;
    grid-template-columns: 220px 1fr;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 40px;
    color: var(--text-muted);
    font-size: 16px;
}

.changelog-item {
    display: grid;
    grid-template-columns: 220px 1fr;
    gap: 0;
}

.version-info {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.version-number {
    font-size: 16px;
    color: var(--text-muted);
}

.version-date {
    font-size: 16px;
    color: var(--text-muted);
}

.content-card {
    background-color: var(--card-bg);
    border-radius: 32px;
    padding: 60px;
    display: grid;
    grid-template-columns: 1fr 1.8fr;
    gap: 80px;
}

.card-header h2 {
    font-size: 32px;
    font-weight: 500;
    margin-bottom: 16px;
}

.card-header .summary {
    color: var(--text-muted);
    font-size: 18px;
}

.accordion {
    display: flex;
    flex-direction: column;
}

.accordion-item {
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
}

.accordion-item:last-child {
    border-bottom: none;
}

.accordion-trigger {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px 0;
    background: none;
    border: none;
    cursor: pointer;
    font-family: inherit;
    font-size: 18px;
    color: var(--text-muted);
    transition: color 0.2s ease;
}

.accordion-trigger:hover {
    color: var(--text-main);
}

.chevron {
    opacity: 0.5;
    transition: transform 0.3s ease;
}

.accordion-item.active .chevron {
    transform: rotate(180deg);
}

.accordion-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease-out;
}

.accordion-item.active .accordion-content {
    max-height: 200px;
}

.accordion-content ul {
    list-style: none;
    padding-bottom: 16px;
}

.accordion-content li {
    font-size: 16px;
    color: var(--text-muted);
    margin-bottom: 12px;
    position: relative;
    padding-left: 16px;
}

.accordion-content li::before {
    content: "•";
    position: absolute;
    left: 0;
    color: #ccc;
}

.empty-msg {
    font-size: 14px;
    color: var(--text-muted);
    padding-bottom: 16px;
    font-style: italic;
}

@media (max-width: 900px) {
    .content-card {
        grid-template-columns: 1fr;
        gap: 20px;
        padding: 30px;
    }

    .table-header,
    .changelog-item {
        grid-template-columns: 1fr;
    }

    .table-header {
        display: none;
    }

    .version-info {
        margin-bottom: 16px;
        flex-direction: row;
        gap: 12px;
    }

    header {
        flex-direction: column;
        gap: 20px;
        margin-bottom: 40px;
    }

    h1 {
        font-size: 32px;
    }
}