/* ========================================
   TamRank Changelog Page
   Dependency: variables.css, global.css
   ======================================== */

/* === HERO === */
.changelog-hero {
    background: linear-gradient(135deg, var(--tr-color-slate-800) 0%, var(--tr-color-slate-900) 100%);
    padding: 160px 0 60px;
    text-align: center;
}

.changelog-hero .hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--tr-space-2);
    padding: 6px var(--tr-space-4);
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.15);
    color: var(--tr-color-primary);
    border-radius: var(--tr-radius-full);
    font-size: var(--tr-text-xs);
    font-weight: var(--tr-font-bold);
    margin-bottom: var(--tr-space-6);
}

.changelog-hero h1 {
    font-size: clamp(var(--tr-text-3xl), 5vw, var(--tr-text-4xl));
    font-weight: var(--tr-font-extrabold);
    color: var(--tr-color-white);
    margin-bottom: var(--tr-space-4);
    letter-spacing: -0.02em;
}

.changelog-hero .hero-description {
    max-width: 480px;
    margin: 0 auto;
    font-size: var(--tr-text-lg);
    color: var(--tr-color-slate-400);
    line-height: var(--tr-leading-relaxed);
}

/* === FILTERS === */
.changelog-filters {
    padding: var(--tr-space-6) 0;
    background: var(--tr-color-base);
    border-bottom: 1px solid var(--tr-color-surface);
}

.changelog-filter-tabs {
    display: flex;
    gap: var(--tr-space-2);
    justify-content: center;
    flex-wrap: wrap;
}

.changelog-filter-tab {
    padding: var(--tr-space-2) var(--tr-space-4);
    background: var(--tr-color-white);
    border: 1px solid var(--tr-color-surface);
    border-radius: var(--tr-radius-full);
    font-family: var(--tr-font-family);
    font-size: var(--tr-text-sm);
    font-weight: var(--tr-font-semibold);
    color: var(--tr-color-slate-600);
    cursor: pointer;
    transition: all var(--tr-transition-base);
}

.changelog-filter-tab:hover {
    border-color: var(--tr-color-primary);
    color: var(--tr-color-primary);
}

.changelog-filter-tab.active {
    background: var(--tr-color-primary);
    border-color: var(--tr-color-primary);
    color: var(--tr-color-white);
}

/* === TIMELINE === */
.changelog-section {
    padding: var(--tr-spacing-section) 0;
    background: var(--tr-color-base);
}

.changelog-timeline {
    max-width: 720px;
    margin: 0 auto;
}

/* === RELEASE ENTRY === */
.changelog-release {
    margin-bottom: var(--tr-space-8);
}

.changelog-release-header {
    display: flex;
    align-items: baseline;
    gap: var(--tr-space-3);
    margin-bottom: var(--tr-space-4);
}

.changelog-version {
    font-size: var(--tr-text-xl);
    font-weight: var(--tr-font-extrabold);
    color: var(--tr-color-slate-900);
    letter-spacing: -0.02em;
}

.changelog-date {
    font-size: var(--tr-text-sm);
    color: var(--tr-color-slate-400);
}

.changelog-release-body {
    background: var(--tr-color-white);
    border: 1px solid var(--tr-color-surface);
    border-radius: var(--tr-radius-xl);
    padding: var(--tr-space-6);
}

/* === CHANGE ITEMS === */
.changelog-items {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: var(--tr-space-3);
}

.changelog-item {
    display: flex;
    align-items: flex-start;
    gap: var(--tr-space-3);
    font-size: var(--tr-text-sm);
    color: var(--tr-color-slate-700);
    line-height: var(--tr-leading-relaxed);
}

/* === TAGS === */
.changelog-tag {
    display: inline-flex;
    align-items: center;
    padding: 2px var(--tr-space-2);
    border-radius: var(--tr-radius-sm);
    font-size: 10px;
    font-weight: var(--tr-font-bold);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    flex-shrink: 0;
    margin-top: 2px;
}

.changelog-tag-new {
    background: rgba(16, 185, 129, 0.1);
    color: var(--tr-color-primary-hover);
}

.changelog-tag-improved {
    background: var(--tr-color-info-bg);
    color: var(--tr-color-info);
}

.changelog-tag-fixed {
    background: var(--tr-color-warning-bg);
    color: var(--tr-color-warning);
}

.changelog-tag-pro {
    background: var(--tr-color-slate-800);
    color: var(--tr-color-white);
}

/* === EMPTY STATE === */
.changelog-empty {
    text-align: center;
    padding: var(--tr-space-12);
    color: var(--tr-color-slate-400);
    font-size: var(--tr-text-sm);
}

/* === RESPONSIVE === */
@media (max-width: 768px) {
    .changelog-hero {
        padding: 120px 0 40px;
    }

    .changelog-section {
        padding: var(--tr-spacing-section-mobile) 0;
    }

    .changelog-release-header {
        flex-direction: column;
        gap: var(--tr-space-1);
    }

    .changelog-release-body {
        padding: var(--tr-space-4);
    }

    .changelog-filter-tabs {
        justify-content: flex-start;
        overflow-x: auto;
        flex-wrap: nowrap;
        padding-bottom: var(--tr-space-2);
        -webkit-overflow-scrolling: touch;
    }

    .changelog-filter-tab {
        white-space: nowrap;
    }
}