/* ============================================
   TRANSCENDENCE — Blog Pages
   Theme: Fresh Ocean / Sky / Sunshine
   ============================================ */

:root {
    --purple-lightest: #f3e8ff;
    --purple-light: #e9d5ff;
    --purple-mid: #a855f7;
    --purple-deep: #7c3aed;
    --purple-darker: #5b21b6;
    --purple-darkest: #2e1065;
    --sun-warm: #ffeaa7;
    --sun-gold: #fdcb6e;
    --sun-orange: #f39c12;
    --fresh-mint: #55efc4;
    --fresh-green: #00b894;
    --white: #ffffff;
    --off-white: #faf7ff;
    --gray-100: #f5f3ff;
    --gray-200: #ede9fe;
    --gray-300: #ddd6fe;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #1f2937;
    --gray-900: #111827;
    --font-sans: 'Inter', 'Times New Roman', sans-serif;
    --font-serif: 'Playfair Display', Georgia, serif;
    --font-mono: 'SF Mono', 'Fira Code', 'Fira Mono', monospace;
    --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 17px; }
body {
    font-family: var(--font-sans);
    color: var(--gray-700);
    background: var(--white);
    line-height: 1.8;
    -webkit-font-smoothing: antialiased;
}
a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }

/* --- Top Navigation Bar --- */
.blog-nav {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(124, 58, 237, 0.08);
    padding: 0 24px;
}
.blog-nav-inner {
    max-width: 1100px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}
.blog-nav-back {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 1rem;
    font-weight: 500;
    color: var(--purple-deep);
    transition: gap 0.3s var(--ease-out);
}
.blog-nav-back:hover { gap: 12px; }
.blog-nav-logo {
    font-family: var(--font-serif);
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--gray-900);
}
.blog-nav-series {
    font-size: 1rem;
    color: var(--gray-500);
    font-weight: 500;
}

/* --- Blog Hero / Header --- */
.blog-hero {
    background: linear-gradient(135deg, #faf7ff 0%, #f3e8ff 40%, #e9d5ff 100%);
    padding: 64px 24px 56px;
    text-align: center;
    border-bottom: 1px solid rgba(124,58,237,0.08);
}
.blog-series-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 7px 18px;
    background: rgba(124,58,237,0.1);
    border-radius: 20px;
    font-size: 1rem;
    font-weight: 600;
    color: var(--purple-deep);
    letter-spacing: 0.05em;
    text-transform: uppercase;
    margin-bottom: 20px;
}
.blog-title {
    font-family: var(--font-serif);
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 600;
    color: var(--gray-900);
    line-height: 1.2;
    margin-bottom: 16px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}
.blog-subtitle {
    font-size: 1.2rem;
    color: var(--gray-600);
    max-width: 620px;
    margin: 0 auto 28px;
    line-height: 1.75;
}
.blog-meta {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    font-size: 1rem;
    color: var(--gray-500);
    flex-wrap: wrap;
}
.blog-meta span {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

/* --- Main Article Layout --- */
.blog-layout {
    display: flex;
    min-height: calc(100vh - 64px);
    position: relative;
}

/* --- TOC Sidebar (Left, Collapsible) --- */
.blog-toc {
    position: fixed;
    left: 0;
    top: 64px;
    bottom: 0;
    width: 280px;
    background: var(--off-white);
    border-right: 1px solid rgba(124,58,237,0.08);
    padding: 32px 24px;
    overflow-y: auto;
    transition: transform 0.3s var(--ease-out);
    z-index: 50;
}
.blog-toc.collapsed {
    transform: translateX(-280px);
}
.toc-toggle {
    position: fixed;
    left: 280px;
    top: 80px;
    width: 36px;
    height: 36px;
    background: var(--white);
    border: 1px solid rgba(124,58,237,0.12);
    border-left: none;
    border-radius: 0 8px 8px 0;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s var(--ease-out);
    z-index: 51;
    color: var(--purple-deep);
    font-size: 1rem;
}
.toc-toggle:hover {
    background: rgba(124,58,237,0.06);
}
.blog-toc.collapsed + .toc-toggle {
    left: 0;
}
.toc-title {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--purple-deep);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 20px;
}
.toc-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 2px;
}
.toc-list li a {
    display: block;
    padding: 7px 12px;
    border-radius: 8px;
    font-size: 0.9rem;
    color: var(--gray-600);
    transition: all 0.2s;
    line-height: 1.5;
}
.toc-list li a:hover {
    background: rgba(124,58,237,0.06);
    color: var(--purple-deep);
}
.toc-list li.toc-h3 a {
    padding-left: 24px;
    font-size: 0.85rem;
}

/* --- Article Content --- */
.blog-article {
    flex: 1;
    margin-left: 280px;
    padding: 56px 80px 80px 80px;
    max-width: 1200px;
    transition: margin-left 0.3s var(--ease-out);
}
.blog-toc.collapsed ~ .blog-article {
    margin-left: 0;
}
.blog-article h2 {
    font-family: var(--font-serif);
    font-size: 1.9rem;
    font-weight: 600;
    color: var(--gray-900);
    margin: 52px 0 18px;
    padding-bottom: 12px;
    border-bottom: 2px solid rgba(124,58,237,0.12);
    line-height: 1.3;
}
.blog-article h2:first-child { margin-top: 0; }
.blog-article h3 {
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--gray-900);
    margin: 36px 0 14px;
}
.blog-article h4 {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--purple-deep);
    margin: 24px 0 10px;
}
.blog-article p {
    font-size: 1.1rem;
    color: var(--gray-700);
    margin-bottom: 18px;
    line-height: 1.9;
}
.blog-article ul, .blog-article ol {
    margin: 12px 0 22px 26px;
}
.blog-article li {
    font-size: 1.1rem;
    color: var(--gray-700);
    margin-bottom: 10px;
    line-height: 1.85;
}
.blog-article strong {
    color: var(--gray-900);
    font-weight: 600;
}
.blog-article em {
    color: var(--purple-deep);
    font-style: normal;
    font-weight: 500;
}
.blog-article a {
    color: var(--purple-deep);
    border-bottom: 1px solid rgba(124,58,237,0.3);
    transition: border-color 0.2s;
}
.blog-article a:hover { border-color: var(--purple-deep); }

/* Code blocks */
.blog-article pre {
    background: #1e293b;
    border-radius: 12px;
    padding: 22px 26px;
    margin: 22px 0;
    overflow-x: auto;
    font-family: var(--font-mono);
    font-size: 1rem;
    line-height: 1.75;
    color: #e2e8f0;
    position: relative;
}
.blog-article code {
    font-family: var(--font-mono);
    font-size: 0.92em;
    background: rgba(124,58,237,0.08);
    color: var(--purple-deep);
    padding: 3px 8px;
    border-radius: 5px;
}
.blog-article pre code {
    background: none;
    color: #e2e8f0;
    padding: 0;
    font-size: 1rem;
}

/* Syntax highlighting in code blocks */
.blog-article pre .kw { color: #c084fc; }
.blog-article pre .fn { color: #67e8f9; }
.blog-article pre .str { color: #86efac; }
.blog-article pre .cm { color: #64748b; font-style: italic; }
.blog-article pre .num { color: #fbbf24; }
.blog-article pre .path { color: #34d399; }

/* Callout boxes */
.callout {
    border-radius: 12px;
    padding: 20px 22px;
    margin: 26px 0;
    display: flex;
    gap: 14px;
    align-items: flex-start;
    font-size: 1.05rem;
    line-height: 1.8;
}
.callout-icon {
    font-size: 1.3rem;
    flex-shrink: 0;
    margin-top: 2px;
}
.callout-body { flex: 1; }
.callout-body p { margin: 0; font-size: 1.05rem; }
.callout-body p + p { margin-top: 8px; }
.callout.tip {
    background: rgba(0, 184, 148, 0.08);
    border: 1px solid rgba(0, 184, 148, 0.2);
    color: #065f46;
}
.callout.tip .callout-icon { color: var(--fresh-green); }
.callout.warning {
    background: rgba(243, 156, 18, 0.08);
    border: 1px solid rgba(243, 156, 18, 0.2);
    color: #78350f;
}
.callout.warning .callout-icon { color: var(--sun-orange); }
.callout.info {
    background: rgba(124, 58, 237, 0.06);
    border: 1px solid rgba(124, 58, 237, 0.15);
    color: var(--purple-darker);
}
.callout.info .callout-icon { color: var(--purple-mid); }
.callout.highlight {
    background: linear-gradient(135deg, rgba(124,58,237,0.06), rgba(168,85,247,0.08));
    border: 1px solid rgba(124,58,237,0.15);
    color: var(--purple-darker);
}
.callout.highlight .callout-icon { color: var(--purple-mid); }

/* Step blocks */
.steps {
    counter-reset: step-counter;
    margin: 24px 0;
    display: flex;
    flex-direction: column;
    gap: 16px;
}
.step {
    display: grid;
    grid-template-columns: 36px 1fr;
    gap: 16px;
    align-items: flex-start;
}
.step-num {
    counter-increment: step-counter;
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--purple-mid), var(--purple-deep));
    color: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    font-weight: 700;
    flex-shrink: 0;
}
.step-content h4 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--gray-900);
    margin: 6px 0 8px;
}
.step-content p {
    font-size: 1.05rem;
    color: var(--gray-700);
    margin: 0 0 8px;
}
.step-content pre { margin: 8px 0 0; }

/* Comparison table */
.compare-table {
    width: 100%;
    border-collapse: collapse;
    margin: 22px 0;
    font-size: 1.05rem;
}
.compare-table th {
    background: rgba(124,58,237,0.08);
    color: var(--purple-deep);
    font-weight: 600;
    padding: 13px 18px;
    text-align: left;
    border-bottom: 2px solid rgba(124,58,237,0.15);
}
.compare-table td {
    padding: 13px 18px;
    border-bottom: 1px solid rgba(124,58,237,0.06);
    color: var(--gray-700);
    vertical-align: top;
    line-height: 1.7;
}
.compare-table tr:last-child td { border-bottom: none; }
.compare-table tr:hover td { background: rgba(124,58,237,0.02); }

/* Info cards / summary cards */
.info-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin: 20px 0;
}
.info-card {
    background: var(--off-white);
    border-radius: 12px;
    padding: 20px;
    border: 1px solid rgba(124,58,237,0.08);
    transition: all 0.3s var(--ease-out);
}
.info-card:hover {
    border-color: rgba(124,58,237,0.2);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(124,58,237,0.08);
}
.info-card-icon {
    font-size: 1.5rem;
    margin-bottom: 10px;
}
.info-card h4 {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 8px;
}
.info-card p {
    font-size: 1rem;
    color: var(--gray-600);
    margin: 0;
    line-height: 1.65;
}

/* Divider */
.blog-divider {
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(124,58,237,0.15), transparent);
    margin: 40px 0;
}

/* Next / prev nav */
.blog-post-nav {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-top: 56px;
    padding-top: 32px;
    border-top: 1px solid rgba(124,58,237,0.1);
}
.post-nav-link {
    padding: 20px;
    background: var(--off-white);
    border-radius: 14px;
    border: 1px solid rgba(124,58,237,0.08);
    transition: all 0.3s var(--ease-out);
    display: flex;
    flex-direction: column;
    gap: 6px;
}
.post-nav-link:hover {
    border-color: rgba(124,58,237,0.2);
    box-shadow: 0 8px 24px rgba(124,58,237,0.08);
    transform: translateY(-2px);
}
.post-nav-link.next { text-align: right; }
.post-nav-label {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--purple-mid);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    display: flex;
    align-items: center;
    gap: 6px;
}
.post-nav-link.next .post-nav-label { justify-content: flex-end; }
.post-nav-title {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--gray-900);
    line-height: 1.4;
}

/* Footer */
.blog-footer {
    background: var(--gray-900);
    color: rgba(255,255,255,0.6);
    padding: 40px 24px;
    text-align: center;
    font-size: 1rem;
}
.blog-footer a {
    color: rgba(255,255,255,0.7);
    border-bottom: none;
    transition: color 0.2s;
}
.blog-footer a:hover { color: var(--white); }

/* Interactive Read Counter */
.read-counter-widget {
    background: linear-gradient(135deg, rgba(124,58,237,0.06), rgba(168,85,247,0.08));
    border: 1px solid rgba(124,58,237,0.15);
    border-radius: 16px;
    padding: 24px 28px;
    margin: 32px 0;
    text-align: center;
}
.read-counter-title {
    font-size: 1rem;
    color: var(--gray-700);
    margin-bottom: 12px;
    line-height: 1.6;
}
.read-counter-title strong {
    color: var(--purple-deep);
}
.read-button {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 28px;
    background: linear-gradient(135deg, var(--purple-mid), var(--purple-deep));
    color: var(--white);
    border: none;
    border-radius: 12px;
    font-size: 1.05rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s var(--ease-out);
    box-shadow: 0 4px 16px rgba(124,58,237,0.25);
    font-family: var(--font-sans);
}
.read-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(124,58,237,0.35);
}
.read-button:active {
    transform: translateY(0);
}
.read-button.clicked {
    background: linear-gradient(135deg, var(--fresh-green), #00b894);
    animation: buttonSuccess 0.5s var(--ease-out);
}
@keyframes buttonSuccess {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}
.read-button-icon {
    font-size: 1.2rem;
    transition: transform 0.3s var(--ease-out);
}
.read-button:hover .read-button-icon {
    transform: scale(1.15);
}
.read-button.clicked .read-button-icon {
    animation: iconBounce 0.6s var(--ease-out);
}
@keyframes iconBounce {
    0%, 100% { transform: scale(1); }
    25% { transform: scale(1.3) rotate(10deg); }
    50% { transform: scale(1.1) rotate(-10deg); }
    75% { transform: scale(1.2) rotate(5deg); }
}
.read-counter-stats {
    margin-top: 16px;
    font-size: 0.95rem;
    color: var(--gray-600);
}
.read-counter-number {
    display: inline-block;
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--purple-deep);
    margin: 0 4px;
    min-width: 30px;
}
.read-counter-thanks {
    margin-top: 12px;
    font-size: 0.95rem;
    color: var(--fresh-green);
    font-weight: 500;
    opacity: 0;
    transition: opacity 0.3s;
}
.read-counter-thanks.show {
    opacity: 1;
}

/* Responsive */
@media (max-width: 1024px) {
    .blog-article {
        padding: 48px 60px 80px 60px;
    }
}
@media (max-width: 768px) {
    html { font-size: 16px; }
    .blog-toc { display: none; }
    .toc-toggle { display: none; }
    .blog-article {
        margin-left: 0;
        padding: 32px 24px 60px;
    }
    .blog-hero { padding: 48px 20px 40px; }
    .blog-post-nav { grid-template-columns: 1fr; }
    .info-cards { grid-template-columns: 1fr; }
    .compare-table { font-size: 0.95rem; }
    .compare-table th, .compare-table td { padding: 10px 12px; }
}