/* LikeFlow Changelog Stylesheet
   Designed for clean, scientific chronological release feed reading.
   Strictly utilizes design tokens from tokens.css and site-canvas.css. */

.changelog-page .site-feature-canvas {
    background-color: var(--canvas);
}

/* --- Hero Section & Breadcrumb --- */
.changelog-hero {
    position: relative;
    max-width: var(--lf-content-max);
    margin: 0 auto;
    padding: calc(var(--space-26) + var(--space-26)) var(--lf-page-gutter) var(--space-10);
    text-align: center;
}

@media (min-width: 768px) {
    .changelog-hero {
        padding: calc(var(--space-26) + var(--space-26) + var(--space-6)) var(--lf-page-gutter-wide) var(--space-14);
    }
}

.changelog-hero__breadcrumb {
    display: flex;
    width: max-content;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    margin: 0 auto var(--space-5);
    padding: var(--space-1) var(--space-4);
    border-radius: var(--radius-full);
    background: rgb(var(--ch-white) / var(--a-04));
    border: 1px solid rgb(var(--ch-white) / var(--a-08));
    font-size: var(--text-sm);
    color: var(--text-secondary);
}

.changelog-hero__breadcrumb a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color var(--dur-base) ease;
}

.changelog-hero__breadcrumb a:hover {
    color: var(--text-primary);
}

.changelog-hero__breadcrumb .material-symbols-outlined {
    font-size: 16px;
    opacity: 0.6;
}

.changelog-hero__eyebrow {
    display: block;
    width: 100%;
    text-align: center;
    font-size: var(--text-xs);
    font-weight: var(--weight-bold);
    letter-spacing: var(--tracking-wider);
    text-transform: uppercase;
    color: var(--brand-blue-tint);
    margin: 0 auto var(--space-3);
    border: none !important;
    background: transparent !important;
    padding: 0 !important;
}

.changelog-hero h1 {
    font-family: 'Inter', sans-serif;
    font-size: var(--text-4xl);
    font-weight: var(--weight-black);
    letter-spacing: var(--tracking-tight);
    line-height: var(--leading-tight);
    color: var(--text-primary);
    max-width: 1040px;
    margin: 0 auto var(--space-5);
    text-wrap: balance;
}

.changelog-hero__lead {
    font-size: clamp(var(--text-base), 2vw, var(--text-xl));
    line-height: var(--lf-leading-body);
    color: var(--text-secondary);
    max-width: 680px;
    margin: 0 auto var(--space-8);
    text-wrap: balance;
}

.changelog-hero__actions {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-8);
}

/* --- Releases Section Container --- */
.changelog-section {
    max-width: var(--lf-content-max);
    margin: 0 auto;
    padding: var(--space-16) var(--lf-page-gutter);
    border-top: 1px solid rgb(var(--ch-white) / var(--a-08));
    scroll-margin-top: var(--space-20);
}

@media (min-width: 768px) {
    .changelog-section {
        padding: var(--space-20) var(--lf-page-gutter-wide);
    }
}

.changelog-section__header {
    max-width: 760px;
    margin: 0 auto var(--space-12);
    text-align: center;
}

.changelog-section__tag {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    font-size: var(--text-xs);
    font-weight: var(--weight-bold);
    letter-spacing: var(--tracking-wider);
    text-transform: uppercase;
    color: var(--brand-blue-tint);
    margin-bottom: var(--space-2);
}

.changelog-section__title {
    font-family: 'Inter', sans-serif;
    font-size: clamp(var(--text-2xl), 3vw, var(--text-4xl));
    font-weight: var(--weight-black);
    letter-spacing: var(--tracking-tight);
    color: var(--text-primary);
    margin: 0 0 var(--space-3);
    text-wrap: balance;
}

.changelog-section__lead {
    font-size: var(--text-base);
    line-height: var(--lf-leading-body);
    color: var(--text-secondary);
    margin: 0;
    text-wrap: balance;
}

/* --- Chronological Timeline Feed --- */
.changelog-timeline {
    position: relative;
    max-width: 860px;
    margin: 0 auto var(--space-12);
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
}

.changelog-timeline::before {
    content: '';
    position: absolute;
    top: var(--space-6);
    bottom: var(--space-6);
    left: 27px;
    width: 2px;
    background: linear-gradient(
        to bottom,
        rgba(var(--brand-blue-rgb), var(--a-42)),
        rgba(var(--brand-violet-rgb), var(--a-30)) 60%,
        rgb(var(--ch-white) / var(--a-08))
    );
    border-radius: var(--radius-full);
}

@media (max-width: 639px) {
    .changelog-timeline::before {
        display: none;
    }
}

.changelog-item {
    position: relative;
    display: flex;
    align-items: flex-start;
    gap: var(--space-5);
}

.changelog-node {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    border-radius: var(--radius-full);
    background: rgb(var(--ch-surface-low));
    border: 2px solid rgba(var(--brand-blue-rgb), var(--a-42));
    box-shadow: 0 0 16px rgba(var(--brand-blue-rgb), var(--a-18));
    color: var(--brand-blue-tint);
    flex-shrink: 0;
    z-index: 1;
}

.changelog-node .material-symbols-outlined {
    font-size: 24px;
}

@media (max-width: 639px) {
    .changelog-node {
        display: none;
    }
}

.changelog-card {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    padding: var(--space-7);
    border-radius: var(--radius-card);
    background: rgb(var(--ch-surface-low) / var(--a-72));
    border: 1px solid rgb(var(--ch-white) / var(--a-08));
    backdrop-filter: blur(var(--blur-md));
    transition: transform var(--dur-base) ease, border-color var(--dur-base) ease, box-shadow var(--dur-base) ease;
}

.changelog-card:hover {
    transform: translateY(-2px);
    border-color: rgba(var(--brand-blue-rgb), var(--a-42));
    box-shadow: 0 16px 36px rgba(0, 0, 0, var(--a-30)), 0 0 20px rgba(var(--brand-blue-rgb), var(--a-10));
}

.changelog-card__header {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-3);
    margin-bottom: var(--space-3);
}

.changelog-card__date-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-full);
    background: rgba(var(--brand-blue-rgb), var(--a-12));
    border: 1px solid rgba(var(--brand-blue-rgb), var(--a-24));
    font-size: var(--text-xs);
    font-weight: var(--weight-bold);
    color: var(--brand-blue-tint);
    font-family: 'Inter', monospace;
}

.changelog-card__mobile-icon {
    display: none;
}

@media (max-width: 639px) {
    .changelog-card__mobile-icon {
        display: inline-flex;
        color: var(--brand-blue-tint);
        font-size: 20px;
    }
}

.changelog-card h3 {
    font-family: 'Inter', sans-serif;
    font-size: var(--text-xl);
    font-weight: var(--weight-bold);
    line-height: var(--leading-snug);
    color: var(--text-primary);
    margin: 0 0 var(--space-2);
}

.changelog-card p {
    font-size: var(--text-base);
    line-height: var(--lf-leading-body);
    color: var(--text-secondary);
    margin: 0;
}

.changelog-card p time {
    display: none; /* Already highlighted in changelog-card__date-badge */
}

/* --- Changelog Footnote Callout --- */
.changelog-note-box {
    max-width: 860px;
    margin: 0 auto;
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
    padding: var(--space-5) var(--space-7);
    border-radius: var(--radius-card);
    background: rgba(var(--brand-blue-rgb), var(--a-08));
    border: 1px solid rgba(var(--brand-blue-rgb), var(--a-18));
    color: var(--text-secondary);
    font-size: var(--text-sm);
    line-height: var(--lf-leading-copy);
}

.changelog-note-box .material-symbols-outlined {
    font-size: 22px;
    color: var(--brand-blue-tint);
    flex-shrink: 0;
    line-height: 1.4;
}

.changelog-note-box p {
    margin: 0;
}

/* --- Closing CTA --- */
.changelog-cta-card {
    max-width: 820px;
    margin: var(--space-16) auto var(--space-20);
    padding: var(--space-12) var(--space-8);
    border-radius: var(--radius-panel);
    background:
        radial-gradient(ellipse 70% 60% at 50% 0%, rgba(var(--brand-blue-rgb), var(--a-14)), transparent 80%),
        rgb(var(--ch-surface-low) / var(--a-85));
    border: 1px solid rgb(var(--ch-white) / var(--a-12));
    text-align: center;
}

.changelog-cta-card h2 {
    font-family: 'Inter', sans-serif;
    font-size: clamp(var(--text-2xl), 3.5vw, var(--text-4xl));
    font-weight: var(--weight-black);
    letter-spacing: var(--tracking-tight);
    color: var(--text-primary);
    margin: 0 0 var(--space-3);
    text-wrap: balance;
}

.changelog-cta-card p {
    font-size: var(--text-base);
    line-height: var(--lf-leading-copy);
    color: var(--text-secondary);
    max-width: 580px;
    margin: 0 auto var(--space-7);
    text-wrap: balance;
}

/* --- Shared Unified CTA Button --- */
.changelog-page .footer-start-free {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--lf-button-foreground) !important;
    background: var(--lf-button-bg) !important;
    border: 1px solid var(--lf-button-border) !important;
    border-radius: var(--radius-full) !important;
    font-size: var(--text-base) !important;
    font-weight: var(--weight-bold) !important;
    padding: var(--space-4) var(--space-8) !important;
    box-shadow: 0 10px 24px rgba(0, 0, 0, var(--a-24)) !important;
    text-decoration: none;
    transition: transform var(--dur-base) ease, box-shadow var(--dur-base) ease !important;
}

.changelog-page .footer-start-free:hover {
    color: var(--lf-button-foreground) !important;
    background: var(--lf-button-bg) !important;
    transform: translateY(-2px) !important;
    box-shadow: 0 14px 30px rgba(0, 0, 0, var(--a-24)), 0 0 16px rgba(var(--brand-blue-rgb), var(--a-14)) !important;
}