/* ============================================================
   BISMUTH.COM — Shared Article Styles
   All article pages reference this file
   ============================================================ */

/* ── ARTICLE LAYOUT ─────────────────────────────────────── */
.article-page {
  padding-top: 72px; /* nav height */
}

.article-container {
  max-width: 780px;
  margin-inline: auto;
  padding-inline: clamp(var(--space-6), 5vw, var(--space-12));
  padding-block: var(--space-16) var(--space-24);
}

/* ── BACK LINK ──────────────────────────────────────────── */
.article-back {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-text-faint);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  text-decoration: none;
  margin-bottom: var(--space-10);
  transition: color var(--t-fast);
}
.article-back:hover {
  color: var(--color-primary);
}
.article-back svg {
  transition: transform var(--t-fast);
}
.article-back:hover svg {
  transform: translateX(-3px);
}

/* ── ARTICLE HEADER ─────────────────────────────────────── */
.article-header {
  margin-bottom: var(--space-12);
}

.article-header__meta {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
  flex-wrap: wrap;
}

.article-header__cat {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  color: var(--color-primary);
  text-transform: uppercase;
  background: var(--color-primary-dim);
  border: 1px solid rgba(126,206,221,0.2);
  padding: 0.3em 0.8em;
  border-radius: var(--radius-sm);
}

.article-header__date {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--color-text-faint);
  letter-spacing: 0.04em;
}

.article-header__title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 1.2rem + 3vw, 3.2rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.025em;
  color: var(--color-text);
  margin-bottom: var(--space-6);
  max-width: 22ch;
}

.article-header__summary {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  line-height: 1.65;
  font-weight: 300;
  border-left: 3px solid var(--color-primary);
  padding-left: var(--space-5);
  margin-top: var(--space-6);
  max-width: 60ch;
}

/* ── ARTICLE DIVIDER ────────────────────────────────────── */
.article-divider {
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg,
    var(--color-primary) 0%,
    rgba(157,126,221,0.5) 40%,
    transparent 100%
  );
  margin-block: var(--space-12);
}

/* ── PROSE BODY ─────────────────────────────────────────── */
.article-prose {
  font-size: 1.0625rem;
  line-height: 1.75;
  color: var(--color-text-muted);
}

.article-prose p {
  margin-bottom: var(--space-6);
  max-width: 68ch;
}

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

.article-prose h2 {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-text);
  margin-top: var(--space-12);
  margin-bottom: var(--space-5);
  letter-spacing: -0.02em;
  line-height: 1.2;
  max-width: unset;
}

.article-prose h3 {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-text);
  margin-top: var(--space-8);
  margin-bottom: var(--space-4);
  line-height: 1.3;
  max-width: unset;
}

.article-prose strong {
  color: var(--color-text);
  font-weight: 600;
}

.article-prose em {
  font-style: italic;
}

.article-prose a {
  color: var(--color-primary);
  text-decoration: underline;
  text-decoration-color: rgba(126,206,221,0.35);
  text-underline-offset: 3px;
  transition: text-decoration-color var(--t-fast), color var(--t-fast);
}
.article-prose a:hover {
  color: var(--color-primary-hover);
  text-decoration-color: var(--color-primary);
}

.article-prose ul {
  list-style: none;
  margin-bottom: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  padding-left: 0;
}

.article-prose ul li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  max-width: 64ch;
}

.article-prose ul li::before {
  content: '';
  flex-shrink: 0;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-primary);
  margin-top: 0.6em;
}

/* ── PULL QUOTE / CALLOUT ───────────────────────────────── */
.article-pullquote {
  border-left: 3px solid var(--color-primary);
  padding: var(--space-5) var(--space-6);
  margin-block: var(--space-8);
  background: var(--color-surface);
  border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
  position: relative;
}

.article-pullquote p {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 500;
  line-height: 1.5;
  color: var(--color-text);
  font-style: italic;
  margin-bottom: 0;
  max-width: unset;
}

.article-pullquote cite {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  color: var(--color-text-faint);
  text-transform: uppercase;
  margin-top: var(--space-3);
  font-style: normal;
}

/* ── CALLOUT BOX ────────────────────────────────────────── */
.article-callout {
  border-left: 3px solid rgba(157,126,221,0.7);
  padding: var(--space-5) var(--space-6);
  margin-block: var(--space-8);
  background: rgba(157,126,221,0.05);
  border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
}

.article-callout p {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  margin-bottom: 0;
  line-height: 1.7;
  max-width: unset;
}

/* ── DATA CALLOUT (teal highlight) ──────────────────────── */
.article-data {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: var(--space-4);
  margin-block: var(--space-8);
}

.article-data__item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5) var(--space-6);
  text-align: center;
}

.article-data__value {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1;
  display: block;
  margin-bottom: var(--space-2);
}

.article-data__label {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  line-height: 1.4;
  display: block;
}

/* ── CHART CONTAINERS ───────────────────────────────────── */
.chart-section {
  margin-block: var(--space-10);
}

.chart-title {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-3);
  letter-spacing: -0.01em;
}

.chart-subtitle {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
  margin-bottom: var(--space-5);
}

.chart-wrap {
  position: relative;
  width: 100%;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
}

.chart-wrap canvas {
  display: block;
  max-width: 100%;
  height: auto !important;
}

/* Specific height constraints */
.chart-wrap--bar { min-height: 280px; }
.chart-wrap--line { min-height: 260px; }
.chart-wrap--doughnut {
  max-width: 380px;
  margin-inline: auto;
}

/* ── DIAGRAM / INFOGRAPHIC ──────────────────────────────── */
.diagram-section {
  margin-block: var(--space-10);
}

.diagram-label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-primary);
  text-transform: uppercase;
  margin-bottom: var(--space-4);
}

/* Flywheel / Flow diagram */
.flywheel {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  flex-wrap: wrap;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
}

.flywheel__node {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  text-align: center;
  padding: var(--space-5);
  min-width: 140px;
}

.flywheel__icon {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--color-primary-dim);
  border: 2px solid rgba(126,206,221,0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  font-size: 1.4rem;
  font-weight: 700;
  font-family: var(--font-display);
}

.flywheel__node-title {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 700;
  color: var(--color-text);
}

.flywheel__node-desc {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  line-height: 1.4;
  max-width: 16ch;
}

.flywheel__arrow {
  color: var(--color-text-faint);
  font-size: 1.5rem;
  flex-shrink: 0;
  padding-inline: var(--space-2);
}

@media (max-width: 600px) {
  .flywheel {
    flex-direction: column;
  }
  .flywheel__arrow {
    transform: rotate(90deg);
  }
}

/* Tier diagram */
.tier-diagram {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
}

.tier {
  border-radius: var(--radius-lg);
  padding: var(--space-5) var(--space-6);
  display: flex;
  align-items: flex-start;
  gap: var(--space-5);
}

.tier--1 {
  background: rgba(126,206,221,0.08);
  border: 1px solid rgba(126,206,221,0.2);
}

.tier--2 {
  background: rgba(157,126,221,0.08);
  border: 1px solid rgba(157,126,221,0.2);
}

.tier--3 {
  background: rgba(221,180,126,0.06);
  border: 1px solid rgba(221,180,126,0.15);
}

.tier__badge {
  flex-shrink: 0;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.3em 0.7em;
  border-radius: var(--radius-sm);
  font-weight: 600;
  white-space: nowrap;
}

.tier--1 .tier__badge { color: #7ECEDD; background: rgba(126,206,221,0.12); }
.tier--2 .tier__badge { color: #9D7EDD; background: rgba(157,126,221,0.12); }
.tier--3 .tier__badge { color: #DDB47E; background: rgba(221,180,126,0.1); }

.tier__content {}

.tier__title {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.tier__items {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.5;
}

.tier__roi {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  margin-top: var(--space-2);
  letter-spacing: 0.04em;
}

/* Comparison cards */
.model-compare {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
  margin-block: var(--space-6);
}

@media (max-width: 560px) {
  .model-compare {
    grid-template-columns: 1fr;
  }
}

.model-card {
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.model-card--old {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
}

.model-card--new {
  background: rgba(126,206,221,0.05);
  border: 1px solid rgba(126,206,221,0.25);
  position: relative;
  overflow: hidden;
}

.model-card--new::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--grad-irid-subtle);
  opacity: 0.04;
  pointer-events: none;
}

.model-card__label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-weight: 600;
}

.model-card--old .model-card__label { color: var(--color-text-faint); }
.model-card--new .model-card__label { color: var(--color-primary); }

.model-card__title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.2;
}

.model-card__items {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.model-card__items li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.5;
  max-width: unset;
}

.model-card--old .model-card__items li::before {
  content: '—';
  flex-shrink: 0;
  color: var(--color-text-faint);
  font-size: 0.85em;
}

.model-card--new .model-card__items li::before {
  content: '✓';
  flex-shrink: 0;
  color: var(--color-primary);
  font-size: 0.85em;
  font-weight: 700;
}

/* ── ARTICLE CTA SECTION ────────────────────────────────── */
.article-cta {
  margin-top: var(--space-16);
  position: relative;
  border-radius: var(--radius-xl);
  padding: var(--space-10) var(--space-8);
  background: var(--color-surface);
  overflow: hidden;
  text-align: center;
}

.article-cta::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1.5px;
  background: var(--grad-iridescent);
  -webkit-mask:
    linear-gradient(#fff 0 0) content-box,
    linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
}

.article-cta::after {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--grad-irid-subtle);
  opacity: 0.04;
  pointer-events: none;
}

.article-cta__label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  color: var(--color-primary);
  text-transform: uppercase;
  margin-bottom: var(--space-4);
  display: block;
  position: relative;
  z-index: 1;
}

.article-cta__title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.3;
  margin-bottom: var(--space-5);
  max-width: 42ch;
  margin-inline: auto;
  position: relative;
  z-index: 1;
}

.article-cta__body {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 52ch;
  line-height: 1.7;
  margin-inline: auto;
  margin-bottom: var(--space-8);
  position: relative;
  z-index: 1;
}

.article-cta .btn {
  position: relative;
  z-index: 1;
}

/* ── RESPONSIVE ─────────────────────────────────────────── */
@media (max-width: 768px) {
  .article-container {
    padding-block: var(--space-10) var(--space-16);
  }

  .article-header__title {
    font-size: clamp(1.75rem, 8vw, 2.5rem);
  }

  .flywheel__node {
    min-width: 110px;
  }
}

@media (max-width: 480px) {
  .article-data {
    grid-template-columns: 1fr 1fr;
  }
}

/* ── LIGHT MODE ADJUSTMENTS ─────────────────────────────── */
[data-theme="light"] .article-header__cat {
  background: rgba(26,125,140,0.1);
  border-color: rgba(26,125,140,0.2);
}

[data-theme="light"] .article-pullquote {
  background: var(--color-surface-2);
}

[data-theme="light"] .chart-wrap {
  background: var(--color-surface);
}

[data-theme="light"] .tier--1 {
  background: rgba(26,125,140,0.05);
  border-color: rgba(26,125,140,0.15);
}

[data-theme="light"] .model-card--new {
  background: rgba(26,125,140,0.04);
  border-color: rgba(26,125,140,0.2);
}