/* Tutorial pages — builds on styles.css (variables, navbar, footer) */

.tutorial-page {
    padding: 120px 0 80px;
}

.tutorial-layout {
    display: grid;
    grid-template-columns: 240px minmax(0, 1fr);
    gap: 3rem;
    align-items: start;
}

/* Table of contents */
.tutorial-toc {
    position: sticky;
    top: 100px;
    padding: 1.25rem;
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.tutorial-toc h2 {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
}

.tutorial-toc ol {
    list-style: none;
    counter-reset: toc;
}

.tutorial-toc li {
    counter-increment: toc;
    margin-bottom: 0.4rem;
}

.tutorial-toc a {
    display: flex;
    gap: 0.5rem;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    line-height: 1.4;
    transition: color 0.2s ease;
}

.tutorial-toc a::before {
    content: counter(toc);
    color: var(--accent-color);
    font-weight: 600;
    min-width: 1rem;
}

.tutorial-toc a:hover,
.tutorial-toc a.active {
    color: var(--text-primary);
}

/* Header */
.tutorial-back {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--accent-color);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    margin-bottom: 1.5rem;
}

.tutorial-back:hover {
    color: var(--primary-color);
}

.tutorial-header h1 {
    font-size: 2.6rem;
    line-height: 1.2;
    margin-bottom: 1rem;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.tutorial-lead {
    font-size: 1.15rem;
    color: var(--text-secondary);
    margin-bottom: 1.25rem;
}

.tutorial-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 2.5rem;
}

.tutorial-meta span {
    font-size: 0.8rem;
    padding: 0.3rem 0.75rem;
    border-radius: 999px;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    background: rgba(99, 102, 241, 0.08);
}

/* Body content */
.tutorial-content {
    max-width: 780px;
}

.tutorial-content section {
    padding: 0;
    margin-bottom: 3.5rem;
    scroll-margin-top: 100px;
}

.tutorial-content h2 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border-color);
}

.tutorial-content h3 {
    font-size: 1.2rem;
    margin: 2rem 0 0.75rem;
    color: var(--text-primary);
}

.tutorial-content p,
.tutorial-content li {
    color: #D1D5DB;
    line-height: 1.8;
}

.tutorial-content p {
    margin-bottom: 1rem;
}

.tutorial-content ul,
.tutorial-content ol {
    margin: 0 0 1.25rem 1.4rem;
}

.tutorial-content li {
    margin-bottom: 0.4rem;
}

.tutorial-content li::marker {
    color: var(--accent-color);
}

.tutorial-content strong {
    color: var(--text-primary);
}

.tutorial-content a {
    color: var(--accent-color);
}

.tutorial-content a:hover {
    color: var(--primary-color);
}

.tutorial-content code {
    font-family: 'JetBrains Mono', 'Fira Code', Consolas, monospace;
    font-size: 0.88em;
    padding: 0.15em 0.4em;
    border-radius: 6px;
    background: rgba(99, 102, 241, 0.14);
    color: #C7D2FE;
}

/* Code blocks */
.code-block {
    position: relative;
    margin: 0 0 1.5rem;
}

.code-block pre {
    background: var(--bg-darker);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 1.1rem 1.2rem;
    overflow-x: auto;
    line-height: 1.6;
}

.code-block pre code {
    background: none;
    padding: 0;
    color: #E5E7EB;
    font-size: 0.86rem;
    white-space: pre;
}

.code-label {
    display: block;
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-secondary);
    margin-bottom: 0.35rem;
    min-height: 1.6rem;
    line-height: 1.6rem;
    padding-right: 4.5rem;
}

.copy-btn {
    position: absolute;
    top: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    border-radius: 6px;
    padding: 0.25rem 0.55rem;
    font-size: 0.75rem;
    font-family: inherit;
    cursor: pointer;
    transition: color 0.2s, border-color 0.2s;
}

.copy-btn:hover,
.copy-btn:focus-visible {
    color: var(--text-primary);
    border-color: var(--primary-color);
}

/* Tables */
.table-wrap {
    overflow-x: auto;
    margin-bottom: 1.5rem;
    border: 1px solid var(--border-color);
    border-radius: 10px;
}

.tutorial-content table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.92rem;
}

.tutorial-content th,
.tutorial-content td {
    text-align: left;
    padding: 0.7rem 0.9rem;
    border-bottom: 1px solid var(--border-color);
    vertical-align: top;
}

.tutorial-content th {
    background: rgba(99, 102, 241, 0.1);
    color: var(--text-primary);
    font-weight: 600;
}

.tutorial-content td {
    color: #D1D5DB;
}

.tutorial-content tr:last-child td {
    border-bottom: none;
}

/* Callouts */
.callout {
    padding: 1rem 1.2rem;
    border-left: 3px solid var(--accent-color);
    background: rgba(6, 182, 212, 0.07);
    border-radius: 0 10px 10px 0;
    margin-bottom: 1.5rem;
}

.callout p:last-child {
    margin-bottom: 0;
}

/* Checklist */
.checklist {
    list-style: none;
    margin-left: 0 !important;
}

.checklist li {
    display: flex;
    gap: 0.6rem;
    align-items: flex-start;
}

.checklist input {
    margin-top: 0.45rem;
    accent-color: var(--primary-color);
    flex-shrink: 0;
}

.checklist label {
    cursor: pointer;
}

@media (max-width: 968px) {
    .tutorial-layout {
        grid-template-columns: minmax(0, 1fr);
        gap: 1.5rem;
    }

    .tutorial-toc {
        position: static;
    }

    .tutorial-header h1 {
        font-size: 2rem;
    }
}

/* Pipeline diagram */
.pipeline {
    display: flex;
    align-items: stretch;
    gap: 0.5rem;
    margin: 0 0 1.5rem;
    flex-wrap: wrap;
}

.pipeline-step {
    flex: 1 1 120px;
    padding: 0.9rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    background: var(--card-bg);
}

.pipeline-step.accent {
    border-color: rgba(99, 102, 241, 0.5);
    background: rgba(99, 102, 241, 0.1);
}

.pipeline-step strong {
    display: block;
    font-size: 0.95rem;
    margin-bottom: 0.2rem;
}

.pipeline-step span {
    font-size: 0.82rem;
    color: var(--text-secondary);
    line-height: 1.4;
    display: block;
}

.pipeline-arrow {
    display: flex;
    align-items: center;
    color: var(--accent-color);
    font-size: 1.1rem;
}

@media (max-width: 768px) {
    .pipeline {
        flex-direction: column;
    }

    .pipeline-step {
        flex: none;
    }

    .pipeline-arrow {
        justify-content: center;
        transform: rotate(90deg);
    }
}

/* Track hub page */
.track-page .tutorial-content {
    max-width: 860px;
    margin: 0 auto;
}

.track-list {
    list-style: none;
    margin: 0 0 2rem !important;
    position: relative;
}

.track-list::before {
    content: '';
    position: absolute;
    left: 19px;
    top: 20px;
    bottom: 20px;
    width: 2px;
    background: var(--border-color);
}

.track-item {
    position: relative;
    display: grid;
    grid-template-columns: 40px minmax(0, 1fr);
    gap: 1rem;
    margin-bottom: 1rem !important;
}

.track-number {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.95rem;
    background: var(--bg-dark);
    border: 2px solid var(--border-color);
    color: var(--text-secondary);
    position: relative;
    z-index: 1;
}

.track-item.published .track-number {
    border-color: var(--primary-color);
    background: rgba(99, 102, 241, 0.2);
    color: var(--text-primary);
}

.track-card {
    padding: 1rem 1.2rem;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    background: var(--card-bg);
}

.track-item.published .track-card {
    border-color: rgba(99, 102, 241, 0.35);
}

.track-item.upcoming .track-card {
    opacity: 0.7;
}

.track-card-head {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.track-card h3 {
    margin: 0 0 0.3rem !important;
    font-size: 1.1rem !important;
}

.track-card h3 a {
    color: var(--text-primary) !important;
    text-decoration: none;
}

.track-card h3 a:hover {
    color: var(--accent-color) !important;
}

.track-card p {
    margin: 0 !important;
    font-size: 0.93rem;
    color: var(--text-secondary) !important;
}

.track-badge {
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    padding: 0.15rem 0.6rem;
    border-radius: 999px;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    white-space: nowrap;
}

.track-item.published .track-badge {
    color: var(--accent-color);
    border-color: rgba(6, 182, 212, 0.4);
}

/* Prev / next navigation inside a track */
.track-nav {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-top: 1rem;
}

.track-nav a,
.track-nav span {
    display: block;
    padding: 1rem 1.2rem;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    background: var(--card-bg);
    text-decoration: none;
    transition: border-color 0.2s;
}

.track-nav a:hover {
    border-color: var(--primary-color);
}

.track-nav small {
    display: block;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-secondary);
    margin-bottom: 0.2rem;
}

.track-nav strong {
    color: var(--text-primary);
    font-weight: 600;
}

.track-nav .next {
    text-align: right;
}

.track-nav span strong {
    color: var(--text-secondary);
}

@media (max-width: 768px) {
    .track-nav {
        grid-template-columns: 1fr;
    }

    .track-nav .next {
        text-align: left;
    }
}

/* Router diagram: one input, several routes */
.router-diagram {
    margin: 0 0 1.5rem;
}

.router-diagram .pipeline {
    margin-bottom: 0.5rem;
}

.router-fanout {
    text-align: center;
    color: var(--accent-color);
    font-size: 0.85rem;
    margin: 0.25rem 0 0.5rem;
}

.router-routes {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
    gap: 0.5rem;
}

.router-routes .pipeline-step.muted {
    border-style: dashed;
}

/* Timing diagram: sequential vs parallel */
.timing {
    border: 1px solid var(--border-color);
    border-radius: 12px;
    background: var(--card-bg);
    padding: 1rem 1.2rem;
    margin: 0 0 1.5rem;
}

.timing-row {
    display: grid;
    grid-template-columns: 110px minmax(0, 1fr) 56px;
    gap: 0.75rem;
    align-items: center;
    margin-bottom: 0.9rem;
}

.timing-row:last-of-type {
    margin-bottom: 0.4rem;
}

.timing-label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
}

.timing-total {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--accent-color);
    text-align: right;
}

.timing-track {
    position: relative;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 3px;
}

.timing-block {
    font-size: 0.72rem;
    padding: 0.3rem 0.4rem;
    border-radius: 6px;
    background: rgba(99, 102, 241, 0.18);
    border: 1px solid rgba(99, 102, 241, 0.45);
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.timing-block.translate {
    background: rgba(6, 182, 212, 0.15);
    border-color: rgba(6, 182, 212, 0.45);
}

.timing-stack {
    display: grid;
    gap: 3px;
}

.timing-note {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin: 0;
}

@media (max-width: 768px) {
    .timing-row {
        grid-template-columns: minmax(0, 1fr) auto;
        gap: 0.35rem 0.5rem;
    }

    .timing-label {
        grid-row: 1;
        grid-column: 1;
    }

    .timing-total {
        grid-row: 1;
        grid-column: 2;
    }

    .timing-track {
        grid-row: 2;
        grid-column: 1 / -1;
    }

    .timing-block {
        white-space: normal;
        line-height: 1.25;
        font-size: 0.62rem;
        padding: 0.3rem 0.15rem;
        text-align: center;
        text-overflow: clip;
    }
}

/* Chat transcript diagram (few-shot) */
.chat-diagram {
    border: 1px solid var(--border-color);
    border-radius: 12px;
    background: var(--card-bg);
    padding: 1rem 1.2rem;
    margin: 0 0 1.5rem;
    display: grid;
    gap: 0.5rem;
}

.chat-msg {
    display: grid;
    grid-template-columns: 92px minmax(0, 1fr);
    gap: 0.75rem;
    align-items: start;
    font-size: 0.88rem;
}

.chat-role {
    font-size: 0.72rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    padding: 0.2rem 0.5rem;
    border-radius: 999px;
    text-align: center;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
}

.chat-msg.system .chat-role {
    color: var(--accent-color);
    border-color: rgba(6, 182, 212, 0.4);
}

.chat-msg.example .chat-role {
    color: #C7D2FE;
    border-color: rgba(99, 102, 241, 0.45);
    background: rgba(99, 102, 241, 0.1);
}

.chat-msg.real .chat-role {
    color: var(--text-primary);
    border-color: var(--primary-color);
}

.chat-text {
    color: #D1D5DB;
    line-height: 1.5;
}

.chat-group-label {
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-secondary);
    margin-top: 0.4rem;
}

@media (max-width: 768px) {
    .chat-msg {
        grid-template-columns: minmax(0, 1fr);
        gap: 0.3rem;
    }

    .chat-role {
        justify-self: start;
    }
}

/* Two-phase pipeline (RAG) */
.phase {
    margin: 0 0 1rem;
}

.phase-label {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 0.5rem;
    font-size: 0.78rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--accent-color);
    margin-bottom: 0.4rem;
}

.phase-label span {
    font-weight: 400;
    text-transform: none;
    letter-spacing: 0;
    color: var(--text-secondary);
}

.phase .pipeline {
    margin-bottom: 0;
}