/* ============================================
   CHANGELOG.CSS - Changelog Page Styles
   ============================================ */

/* ============ GRID BACKGROUND ============ */
.changelog-grid-bg {
    position: absolute;
    inset: 0;
    pointer-events: none;
    background-image:
        linear-gradient(to right, var(--color-border-light) 1px, transparent 1px),
        linear-gradient(to bottom, var(--color-border-light) 1px, transparent 1px);
    background-size: 80px 80px;
    mask-image: radial-gradient(ellipse 70% 50% at 50% 50%, black 20%, transparent 100%);
    -webkit-mask-image: radial-gradient(ellipse 70% 50% at 50% 50%, black 20%, transparent 100%);
    opacity: 0.6;
}

/* ============ HERO ============ */
.changelog-hero {
    position: relative;
    overflow: hidden;
}

.changelog-hero-content {
    position: relative;
    z-index: 1;
}

/* ============ CHANGELOG SECTION ============ */
.changelog-section {
    padding: var(--space-4xl) 0;
    background: var(--color-paper);
}

.changelog-container {
    max-width: 800px;
    margin: 0 auto;
}

/* ============ CHANGELOG ENTRY ============ */
.changelog-entry {
    display: grid;
    grid-template-columns: 160px 1fr;
    gap: var(--space-2xl);
    padding: var(--space-3xl) 0;
    border-bottom: 1px solid var(--color-border-light);
}

.changelog-entry:first-child {
    padding-top: 0;
}

.changelog-entry:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

/* ============ DATE ============ */
.changelog-date {
    font-size: var(--text-small, 0.875rem);
    color: var(--color-ink-muted);
    padding-top: 0.25rem;
    position: sticky;
    top: 100px;
    height: fit-content;
    font-feature-settings: var(--font-settings);
}

/* ============ CONTENT ============ */
.changelog-content h2 {
    font-size: 1.375rem;
    font-weight: var(--fw-semibold);
    color: var(--color-ink);
    margin-bottom: var(--space-md);
    letter-spacing: -0.01em;
    font-feature-settings: var(--font-settings);
}

.changelog-content > p {
    font-size: var(--text-regular, 0.9375rem);
    color: var(--color-ink-muted);
    line-height: 1.7;
    margin-bottom: var(--space-xl);
    font-feature-settings: var(--font-settings);
}

/* ============ TAGS ============ */
.changelog-tags {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-bottom: var(--space-md);
    flex-wrap: wrap;
}

.changelog-tag {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    font-size: var(--text-small, 0.875rem);
    font-weight: var(--fw-medium);
    color: var(--color-ink-muted);
    font-feature-settings: var(--font-settings);
}

.tag-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    flex-shrink: 0;
}

.tag-feature .tag-dot {
    background: var(--color-primary);
}

.tag-improvement .tag-dot {
    background: var(--bs-info);
}

.tag-fix .tag-dot {
    background: var(--color-ink-faint);
}

.version-badge {
    font-size: var(--text-micro, 0.75rem);
    font-weight: var(--fw-medium);
    color: var(--color-ink-faint);
    font-family: var(--font-mono);
    font-feature-settings: var(--font-settings);
}

/* ============ CHANGE GROUPS ============ */
.changelog-changes {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.change-group h4 {
    font-size: var(--text-mini, 0.8125rem);
    font-weight: var(--fw-semibold);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    margin-bottom: var(--space-sm);
    color: var(--color-ink-faint);
    font-feature-settings: var(--font-settings);
}

.change-group ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

.change-group li {
    position: relative;
    padding: 0.25rem 0 0.25rem var(--space-lg);
    font-size: var(--text-regular, 0.9375rem);
    color: var(--color-ink-muted);
    line-height: 1.65;
    font-feature-settings: var(--font-settings);
}

.change-group li::before {
    content: '';
    position: absolute;
    left: 0.375rem;
    top: 0.7em;
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: var(--color-border);
}

.change-group-new li::before {
    content: '+';
    width: auto;
    height: auto;
    border-radius: 0;
    background: none;
    left: 0;
    top: 0.25rem;
    font-size: var(--text-regular, 0.9375rem);
    font-weight: var(--fw-bold);
    color: var(--color-primary);
    line-height: 1;
}

/* ============ LOAD MORE ============ */
.changelog-load-more {
    text-align: center;
    padding-top: var(--space-xl);
    max-width: 800px;
    margin: 0 auto;
}

.changelog-load-more .btn-outline {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-sm) var(--space-lg);
    background: transparent;
    border: 1.5px solid var(--color-border);
    color: var(--color-ink-muted);
    font-size: var(--text-mini, 0.8125rem);
    font-weight: var(--fw-medium);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: border-color 0.2s ease, color 0.2s ease;
    font-feature-settings: var(--font-settings);
}

.changelog-load-more .btn-outline:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.changelog-load-more .btn-outline i {
    font-size: 0.75rem;
}

.load-more-count {
    color: inherit;
    font-weight: var(--fw-normal);
}

/* ============ HIDDEN/REVEALED STATES ============ */
.changelog-entry.changelog-hidden {
    display: none;
}

.changelog-entry.changelog-revealed {
    display: grid;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.4s ease-out, transform 0.4s ease-out;
}

.changelog-entry.changelog-revealed.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ============ SUBSCRIBE SECTION ============ */
.changelog-subscribe-section {
    padding: var(--space-3xl) 0;
    background: var(--color-paper-cool);
}

.changelog-subscribe {
    display: flex;
    align-items: center;
    gap: var(--space-xl);
    padding: var(--space-xl) var(--space-2xl);
    background: var(--color-paper);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    max-width: 800px;
    margin: 0 auto;
}

.subscribe-icon {
    width: 48px;
    height: 48px;
    min-width: 48px;
    background: var(--color-paper-cool);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-ink-muted);
    font-size: 1.125rem;
    flex-shrink: 0;
}

.subscribe-content {
    flex: 1;
}

.subscribe-content h3 {
    font-size: var(--text-regular, 0.9375rem);
    font-weight: var(--fw-semibold);
    color: var(--color-ink);
    margin-bottom: 4px;
    font-feature-settings: var(--font-settings);
}

.subscribe-content p {
    font-size: var(--text-small, 0.875rem);
    color: var(--color-ink-muted);
    margin: 0;
    font-feature-settings: var(--font-settings);
}

.subscribe-form {
    display: flex;
    gap: var(--space-sm);
    flex-shrink: 0;
}

.subscribe-form input {
    padding: var(--space-sm) var(--space-md);
    font-family: var(--font-body);
    font-size: var(--text-regular, 0.9375rem);
    color: var(--color-ink);
    background: var(--color-paper);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    min-width: 220px;
    transition: border-color 0.2s ease;
    font-feature-settings: var(--font-settings);
}

.subscribe-form input:focus {
    outline: none;
    border-color: var(--color-primary);
}

.subscribe-form input::placeholder {
    color: var(--color-ink-faint);
}

/* ============ EMPTY STATE ============ */
.changelog-empty {
    text-align: center;
    padding: var(--space-4xl) var(--space-xl);
}

.changelog-empty .empty-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--space-lg);
    background: var(--color-paper-cool);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-ink-muted);
    font-size: 1.5rem;
}

.changelog-empty h3 {
    font-size: 1.25rem;
    font-weight: var(--fw-semibold);
    color: var(--color-ink);
    margin-bottom: var(--space-sm);
    font-feature-settings: var(--font-settings);
}

.changelog-empty p {
    font-size: var(--text-regular, 0.9375rem);
    color: var(--color-ink-muted);
    margin: 0;
    font-feature-settings: var(--font-settings);
}

/* ============ RESPONSIVE ============ */
@media (max-width: 768px) {
    .changelog-entry {
        grid-template-columns: 1fr;
        gap: var(--space-sm);
    }

    .changelog-date {
        position: static;
    }

    .changelog-subscribe {
        flex-direction: column;
        text-align: center;
        padding: var(--space-xl);
    }

    .subscribe-form {
        width: 100%;
        flex-direction: column;
    }

    .subscribe-form input {
        min-width: auto;
        width: 100%;
    }

    .subscribe-form .btn {
        width: 100%;
    }
}

/* ============ DARK MODE ============ */
[data-bs-theme=dark] .changelog-grid-bg {
    background-image:
        linear-gradient(to right, rgba(255, 255, 255, 0.04) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
}

[data-bs-theme=dark] .changelog-subscribe {
    background: var(--color-card, #141416);
    border-color: rgba(255, 255, 255, 0.06);
}

[data-bs-theme=dark] .subscribe-icon {
    background: rgba(255, 255, 255, 0.06);
}

[data-bs-theme=dark] .subscribe-form input {
    background: rgba(255, 255, 255, 0.04);
    border-color: rgba(255, 255, 255, 0.06);
}