/* ============================================
   Validation Walkthrough — page-specific styles
   Inherits palette + fonts from /styles.css
   ============================================ */

body.val-body {
    background: var(--gray-50);
    color: var(--gray-800);
}

/* ───── Header ───── */
.val-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: saturate(180%) blur(8px);
    border-bottom: 1px solid var(--gray-200);
}
.val-header-inner {
    max-width: 1400px;
    margin: 0 auto;
    padding: 14px 32px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}
.val-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: var(--display);
    font-weight: 600;
    color: var(--gray-900);
    font-size: 15px;
}
.val-logo { width: 28px; height: 28px; border-radius: 4px; }
.val-brand-name { letter-spacing: -0.01em; }
.val-brand-sep { color: var(--gray-300); font-weight: 400; }
.val-brand-page { color: var(--gray-600); font-weight: 500; font-family: var(--sans); }
.val-back {
    font-family: var(--mono);
    font-size: 12px;
    color: var(--gray-500);
    padding: 6px 12px;
    border: 1px solid var(--gray-200);
    border-radius: 6px;
    transition: all var(--transition);
}
.val-back:hover { color: var(--gray-900); border-color: var(--gray-400); background: var(--white); }

/* ───── Layout — TOC + content ───── */
.val-main {
    max-width: 1400px;
    margin: 0 auto;
    padding: 32px;
    display: grid;
    grid-template-columns: 230px 1fr;
    gap: 48px;
    align-items: flex-start;
}
.val-toc {
    position: sticky;
    top: 80px;
    padding: 20px 16px;
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
}
.val-toc-label {
    font-family: var(--mono);
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--gray-500);
    font-weight: 500;
    margin-bottom: 12px;
}
.val-toc ol {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 6px;
}
.val-toc a {
    display: block;
    font-size: 13px;
    color: var(--gray-600);
    padding: 4px 8px;
    border-radius: 4px;
    transition: all var(--transition);
}
.val-toc a:hover {
    color: var(--gray-900);
    background: var(--gray-100);
}

.val-content {
    min-width: 0; /* allow grid item to shrink for pre code */
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    padding: 48px 56px;
}

/* ───── Typography ───── */
.val-section { margin-bottom: 64px; scroll-margin-top: 100px; }
.val-section-intro { margin-bottom: 56px; }

.val-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-family: var(--mono);
    font-size: 11px;
    color: var(--blue);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    margin-bottom: 18px;
}
.val-dot {
    width: 7px; height: 7px;
    border-radius: 50%;
    background: var(--blue);
    box-shadow: 0 0 0 0 rgba(37, 99, 235, 0.4);
    animation: vPulse 2s ease-out infinite;
}
@keyframes vPulse {
    0% { box-shadow: 0 0 0 0 rgba(37, 99, 235, 0.45); }
    70% { box-shadow: 0 0 0 8px rgba(37, 99, 235, 0); }
    100% { box-shadow: 0 0 0 0 rgba(37, 99, 235, 0); }
}

.val-h1 {
    font-family: var(--display);
    font-size: 38px;
    line-height: 1.15;
    font-weight: 600;
    color: var(--gray-900);
    letter-spacing: -0.025em;
    margin-bottom: 18px;
}
.val-h2 {
    font-family: var(--display);
    font-size: 26px;
    font-weight: 600;
    color: var(--gray-900);
    letter-spacing: -0.02em;
    line-height: 1.25;
    margin-bottom: 14px;
}
.val-h3 {
    font-family: var(--display);
    font-size: 16px;
    font-weight: 600;
    color: var(--gray-900);
    letter-spacing: -0.01em;
    margin: 28px 0 12px;
}
.val-lead {
    font-size: 16px;
    color: var(--gray-600);
    line-height: 1.65;
    margin-bottom: 22px;
}
.val-p {
    font-size: 14.5px;
    color: var(--gray-700);
    line-height: 1.65;
    margin-bottom: 14px;
}
.val-p-close { color: var(--gray-900); font-weight: 500; padding-top: 8px; }
.val-content code {
    font-family: var(--mono);
    font-size: 0.86em;
    background: var(--gray-100);
    padding: 1px 5px;
    border-radius: 3px;
    color: var(--gray-900);
}

/* ───── Callouts ───── */
.val-callout {
    padding: 16px 18px;
    border-radius: var(--radius);
    margin: 18px 0;
    font-size: 14px;
    line-height: 1.6;
    color: var(--gray-800);
}
.val-callout strong { color: var(--gray-900); }
.val-callout-key {
    background: linear-gradient(180deg, #f0f7ff 0%, #e7f0ff 100%);
    border-left: 3px solid var(--blue);
}
.val-callout-note {
    background: var(--gray-50);
    border-left: 3px solid var(--gray-400);
}
.val-callout-warn {
    background: #fffbeb;
    border-left: 3px solid #d97706;
}
.val-callout ol, .val-callout ul {
    margin: 8px 0 0 18px;
    padding: 0;
}
.val-callout li {
    margin: 6px 0;
    font-size: 13.5px;
}

/* ───── Cycle list ───── */
.val-cycle {
    list-style: none;
    padding: 0;
    margin: 18px 0 0;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}
.val-cycle li {
    display: flex;
    gap: 14px;
    padding: 16px;
    background: var(--gray-50);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius);
    transition: all var(--transition);
}
.val-cycle li:hover { border-color: var(--blue-200); background: #f8faff; }
.val-cycle-num {
    font-family: var(--mono);
    font-size: 11px;
    color: var(--blue);
    font-weight: 600;
    letter-spacing: 0.04em;
    flex-shrink: 0;
    padding-top: 2px;
}
.val-cycle-body strong {
    display: block;
    font-family: var(--display);
    font-size: 15px;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 4px;
}
.val-cycle-body p { font-size: 13px; color: var(--gray-600); line-height: 1.55; }
.val-cycle-body code {
    font-size: 0.85em;
    background: var(--white);
    padding: 1px 4px;
    border: 1px solid var(--gray-200);
    border-radius: 3px;
}

/* ───── LLM grid ───── */
.val-llm-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin: 24px 0;
}
.val-llm-col {
    padding: 22px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--gray-200);
}
.val-llm-col-yes {
    background: #f8faff;
    border-color: var(--blue-200);
}
.val-llm-col-no {
    background: var(--gray-50);
}
.val-llm-tag {
    display: inline-block;
    font-family: var(--mono);
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    padding: 3px 8px;
    border-radius: 3px;
    margin-bottom: 12px;
    font-weight: 500;
}
.val-llm-tag-yes { background: var(--blue); color: var(--white); }
.val-llm-tag-no  { background: var(--gray-700); color: var(--white); }
.val-llm-col h3 {
    font-family: var(--display);
    font-size: 16px;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 12px;
}
.val-llm-list {
    margin: 0;
    padding-left: 18px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.val-llm-list li {
    font-size: 13.5px;
    color: var(--gray-700);
    line-height: 1.6;
}
.val-llm-list strong { color: var(--gray-900); }

/* Contract gate */
.val-gate {
    background: var(--gray-900);
    color: var(--gray-100);
    border-radius: var(--radius-lg);
    padding: 22px 24px;
    margin: 20px 0;
}
.val-gate-label {
    font-family: var(--mono);
    font-size: 11px;
    color: var(--blue-glow);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 14px;
}
.val-gate-flow {
    display: flex;
    align-items: center;
    gap: 6px;
    flex-wrap: wrap;
    margin-bottom: 12px;
}
.val-gate-step {
    padding: 6px 12px;
    border: 1px solid var(--gray-700);
    border-radius: 4px;
    background: var(--gray-800);
    font-family: var(--mono);
    font-size: 11.5px;
    font-weight: 500;
}
.val-gate-check { color: var(--blue-glow); border-color: rgba(96, 165, 250, 0.3); }
.val-gate-pass { color: #34d399; border-color: rgba(52, 211, 153, 0.4); background: rgba(52, 211, 153, 0.08); }
.val-gate-arr {
    color: var(--gray-600);
    font-family: var(--mono);
    font-size: 12px;
}
.val-gate-note {
    font-size: 12.5px;
    color: var(--gray-400);
    line-height: 1.55;
    margin: 0;
    padding-top: 4px;
    border-top: 1px solid var(--gray-800);
    margin-top: 12px;
    padding-top: 12px;
}

/* ───── Walkthrough head ───── */
.val-walk-head {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    margin-bottom: 24px;
}
.val-walk-num {
    font-family: var(--display);
    font-size: 28px;
    font-weight: 600;
    color: var(--blue);
    line-height: 1;
    flex-shrink: 0;
    padding-top: 2px;
}
.val-walk-sub {
    font-size: 14px;
    color: var(--gray-600);
    line-height: 1.55;
    margin: 0;
}
.val-walk-loop .val-walk-num { color: #d97706; }

/* ───── Side-by-side panes ───── */
.val-pair {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin: 18px 0;
}
.val-pane {
    background: #fcfcfd;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius);
    overflow: hidden;
    min-width: 0;
}
.val-pane-head {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 9px 14px;
    background: var(--gray-100);
    border-bottom: 1px solid var(--gray-200);
}
.val-pane-tag {
    font-family: var(--mono);
    font-size: 10px;
    font-weight: 600;
    color: var(--gray-700);
    background: var(--white);
    border: 1px solid var(--gray-300);
    padding: 2px 6px;
    border-radius: 3px;
    letter-spacing: 0.08em;
}
.val-pane-tag-tgt {
    color: var(--blue);
    border-color: var(--blue-200);
    background: var(--blue-50);
}
.val-pane-path {
    font-family: var(--mono);
    font-size: 12px;
    color: var(--gray-600);
    background: transparent !important;
    padding: 0 !important;
    border: none;
}

/* ───── Code blocks ───── */
.val-code {
    font-family: var(--mono);
    font-size: 11.5px;
    line-height: 1.65;
    color: var(--gray-700);
    padding: 14px 0 14px 0;
    overflow-x: auto;
    margin: 0;
    white-space: pre;
    background: #fcfcfd;
}
.val-code .ln {
    display: inline-block;
    width: 32px;
    padding-right: 12px;
    color: var(--gray-400);
    text-align: right;
    user-select: none;
    border-right: 1px solid var(--gray-200);
    margin-right: 12px;
}
.val-code .tag  { color: #7c3aed; }
.val-code .atr  { color: #b45309; }
.val-code .str  { color: #059669; }
.val-code .cm   { color: var(--gray-400); font-style: italic; }
.val-code .key  { color: #1e40af; }
.val-code .num  { color: #c2410c; }
.val-code .kw   { color: #7c3aed; font-weight: 500; }
.val-code .brc  { color: var(--gray-500); }
.val-code .var  { color: #0e7490; }
.val-code .fn   { color: #be185d; }
.val-code .hl   { background: #fef08a; padding: 0 3px; border-radius: 2px; color: #713f12; font-weight: 600; }

/* ───── Lineage table ───── */
.val-lineage {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
    margin: 12px 0 18px;
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius);
    overflow: hidden;
}
.val-lineage thead {
    background: var(--gray-100);
    border-bottom: 1px solid var(--gray-200);
}
.val-lineage th {
    text-align: left;
    padding: 10px 14px;
    font-family: var(--mono);
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--gray-600);
    font-weight: 500;
}
.val-lineage td {
    padding: 10px 14px;
    border-bottom: 1px solid var(--gray-100);
    vertical-align: top;
    color: var(--gray-700);
    line-height: 1.55;
}
.val-lineage tr:last-child td { border-bottom: none; }
.val-lineage td:nth-child(2) { color: var(--blue); font-family: var(--mono); font-size: 12px; }

/* ───── Evidence ─── */
.val-evidence {
    list-style: none;
    padding: 0;
    margin: 18px 0;
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.val-evidence li {
    padding: 10px 14px;
    background: var(--gray-50);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius);
    font-size: 13.5px;
    color: var(--gray-700);
    line-height: 1.55;
}
.val-evidence li code {
    color: var(--blue);
    background: var(--white);
    border: 1px solid var(--blue-200);
    font-weight: 500;
}

/* ───── Honest ───── */
.val-section-honest {
    background: linear-gradient(180deg, var(--gray-50) 0%, var(--white) 100%);
    margin: 0 -56px -64px;
    padding: 56px 56px 64px;
    border-top: 1px solid var(--gray-200);
}
.val-honest {
    list-style: none;
    padding: 0;
    margin: 18px 0;
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.val-honest li {
    padding: 14px 18px;
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius);
    font-size: 14px;
    line-height: 1.6;
    color: var(--gray-700);
}
.val-honest strong { color: var(--gray-900); }

/* ───── Footer ───── */
.val-foot {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 0 0;
    border-top: 1px solid var(--gray-200);
    margin-top: 40px;
    font-size: 12px;
}
.val-foot-link { color: var(--gray-500); font-family: var(--mono); }
.val-foot-link:hover { color: var(--gray-900); }
.val-foot-meta { color: var(--gray-400); font-family: var(--mono); }

/* ───── Responsive ───── */
@media (max-width: 1024px) {
    .val-main { grid-template-columns: 1fr; gap: 24px; padding: 20px; }
    .val-toc { position: static; padding: 14px; }
    .val-toc ol { flex-direction: row; flex-wrap: wrap; gap: 4px; }
    .val-toc a { padding: 4px 8px; font-size: 12px; }
    .val-content { padding: 32px 24px; }
    .val-pair { grid-template-columns: 1fr; }
    .val-cycle { grid-template-columns: 1fr; }
    .val-llm-grid { grid-template-columns: 1fr; }
    .val-section-honest { margin: 0 -24px -32px; padding: 40px 24px; }
}
@media (max-width: 640px) {
    .val-h1 { font-size: 28px; }
    .val-h2 { font-size: 22px; }
    .val-content { padding: 24px 16px; }
    .val-section-honest { margin: 0 -16px -24px; padding: 32px 16px; }
    .val-code { font-size: 10.5px; }
    .val-lineage { font-size: 12px; }
    .val-lineage td, .val-lineage th { padding: 8px 10px; }
    .val-gate-flow { flex-direction: column; align-items: stretch; }
    .val-gate-step { text-align: center; }
    .val-gate-arr { text-align: center; transform: rotate(90deg); padding: 2px 0; }
}