/* ============================================================
   style.css — Research / Article Report Page (/research/)
   healthinsight.news
   ============================================================ */

@import url('../tokens.css');

/* ── Base ───────────────────────────────────────────────── */
body {
  font-family: var(--font-body);
  background-color: var(--color-surface);
  color: var(--color-on-surface);
}

/* ── Site Header ────────────────────────────────────────── */
.site-header {
  width: 100%;
  background-color: #ffffff;
  padding: 1rem 1.5rem;
  border-bottom: 4px solid var(--color-primary);
  position: sticky;
  top: 0;
  z-index: 50;
  box-shadow: 0 1px 2px rgba(0,0,0,0.05);
}

.site-header__inner {
  max-width: var(--max-w-7xl);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.site-header__eyebrow {
  font-family: var(--font-mono);
  font-size: 0.5625rem;
  text-transform: uppercase;
  letter-spacing: 0.3em;
  color: #6b7280;
  margin-bottom: 0.75rem;
  border-bottom: 1px solid #e5e7eb;
  padding-bottom: 0.25rem;
  white-space: nowrap;
}

@media (min-width: 640px) {
  .site-header__eyebrow { font-size: 0.625rem; }
}

.site-header__logo {
  font-family: var(--font-serif);
  font-size: 2.5rem;
  font-weight: 900;
  color: #0f172a;
  line-height: 1;
  letter-spacing: -0.05em;
}

@media (min-width: 640px) {
  .site-header__logo { font-size: 3rem; }
}

.site-header__logo span { color: var(--color-primary); }

/* ── Research Main ──────────────────────────────────────── */

/* ── Hero Section ───────────────────────────────────────── */
.research-hero {
  max-width: var(--max-w-7xl);
  margin: 0 auto;
  padding: 1.5rem 1.5rem 2rem;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  align-items: flex-start;
}

@media (min-width: 1024px) {
  .research-hero { 
    grid-template-columns: 7fr 5fr; 
    padding: 3rem 1.5rem 6rem;
    gap: 3rem;
  }
}

.research-hero__text {
  border-left: 4px solid var(--color-primary);
  padding-left: 1rem;
}

@media (min-width: 768px) {
  .research-hero__text {
    border-left: 8px solid var(--color-primary);
    padding-left: 2rem;
  }
}

.research-hero__title {
  font-family: var(--font-headline);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-on-background);
  line-height: 1.1;
  margin-bottom: 1rem;
  letter-spacing: -0.025em;
}

@media (min-width: 768px) {
  .research-hero__title { font-size: 3.5rem; margin-bottom: 2rem; }
}

@media (min-width: 1024px) {
  .research-hero__title { font-size: 4.375rem; }
}

.research-hero__deck {
  font-family: var(--font-serif);
  font-size: 1rem;
  color: #4b5563;
  line-height: 1.5;
  margin-bottom: 1.5rem;
}

@media (min-width: 768px) {
  .research-hero__deck { font-size: 1.25rem; margin-bottom: 2rem; }
}

@media (min-width: 1024px) {
  .research-hero__deck { font-size: 1.5rem; margin-bottom: 2.5rem; }
}

.research-hero__blockquote {
  margin-bottom: 1.5rem;
  border-left: 4px solid var(--color-tertiary);
  padding-left: 1rem;
}

.research-hero__blockquote blockquote {
  font-family: var(--font-serif);
  font-size: 1.125rem;
  font-style: italic;
  color: var(--color-primary);
  font-weight: 600;
  line-height: 1.4;
}

@media (min-width: 768px) {
  .research-hero__blockquote { margin-bottom: 3rem; padding-left: 1.5rem; }
  .research-hero__blockquote blockquote { font-size: 1.5rem; line-height: 1.35; }
}

/* Hero Right Column */

.research-vsl-thumb {
  position: relative;
  cursor: pointer;
  background-color: #0f172a;
  overflow: hidden;
  box-shadow: 0 25px 50px -12px rgba(0,0,0,0.25);
  border-radius: var(--radius-sm);
}

.research-vsl-thumb__img {
  width: 100%;
  height: auto;
  opacity: 0.7;
  aspect-ratio: 16/9;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.research-vsl-thumb:hover .research-vsl-thumb__img {
  transform: scale(1.05);
}

.research-vsl-thumb__play {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.research-vsl-thumb__play-btn {
  width: 5rem;
  height: 5rem;
  background-color: rgba(255,255,255,0.2);
  backdrop-filter: blur(12px);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color 300ms ease;
}

.research-vsl-thumb:hover .research-vsl-thumb__play-btn {
  background-color: rgba(158,0,0,0.9);
}

.research-vsl-thumb__play-btn .material-symbols-outlined {
  color: #ffffff;
  font-size: 3rem;
  font-variation-settings: 'FILL' 1;
}

@media (min-width: 768px) {
  .research-vsl-thumb__play-btn { width: 7rem; height: 7rem; }
  .research-vsl-thumb__play-btn .material-symbols-outlined { font-size: 4.375rem; }
}

.research-vsl-thumb__badge {
  position: absolute;
  bottom: 1rem;
  right: 1rem;
  background-color: rgba(0,0,0,0.6);
  padding: 0.25rem 0.75rem;
  color: #ffffff;
  font-family: var(--font-mono);
  font-size: 0.625rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  backdrop-filter: blur(4px);
}

/* Alert box */
.research-self-check {
  margin-top: 2rem;
  border-left: 4px solid var(--color-error);
  background-color: rgba(255,218,214,0.3);
  padding: 1.5rem;
}

.research-self-check__title {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--color-error);
  font-weight: 700;
  margin-bottom: 1rem;
}

.research-self-check__list {
  list-style: none;
}

.research-self-check__item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
  font-family: var(--font-body);
  font-size: 0.875rem;
  color: var(--color-on-surface-variant);
  font-weight: 500;
}

.research-self-check__item .material-symbols-outlined {
  color: var(--color-error);
  font-size: 1.125rem;
  flex-shrink: 0;
}

/* ── Symptom Checklist ──────────────────────────────────── */
.symptoms-section {
  background-color: var(--color-surface-container-low);
  padding: 6rem 1.5rem;
}

.symptoms-section__inner {
  max-width: var(--max-w-4xl);
  margin: 0 auto;
}

.symptoms-section__header {
  text-align: center;
  margin-bottom: 4rem;
}

.symptoms-section__desc {
  font-family: var(--font-body);
  font-size: 1.125rem;
  color: var(--color-on-surface-variant);
  max-width: 40rem;
  margin: 0 auto;
  line-height: 1.625;
}

.symptoms-section__alert {
  color: var(--color-error);
  font-weight: 700;
  font-size: 1.25rem;
  margin-top: 1.5rem;
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

.symptoms-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.75rem 3rem;
}

@media (min-width: 768px) {
  .symptoms-grid { grid-template-columns: repeat(2, 1fr); }
}

.symptom-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  background-color: #ffffff;
  padding: 1rem;
  box-shadow: 0 1px 2px rgba(0,0,0,0.05);
  border: 1px solid #f1f5f9;
}

.symptom-item .material-symbols-outlined {
  color: var(--color-secondary);
  font-size: 1.25rem;
  font-variation-settings: 'FILL' 1;
  flex-shrink: 0;
}

.symptom-item__text {
  font-family: var(--font-body);
  color: #1f2937;
  font-weight: 500;
}

.symptoms-cta {
  margin-top: 4rem;
  display: flex;
  justify-content: center;
}

.symptoms-cta__btn {
  display: inline-flex;
  align-items: center;
  gap: 1rem;
  background-color: var(--color-secondary);
  color: #ffffff;
  padding: 1.25rem 2.5rem;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 1.125rem;
  border: none;
  cursor: pointer;
  transition: box-shadow var(--transition-base);
}

.symptoms-cta__btn:hover {
  box-shadow: 0 20px 25px -5px rgba(0,0,0,0.15);
}

.symptoms-cta__btn .material-symbols-outlined {
  color: #ffffff;
  font-variation-settings: 'FILL' 1;
}

/* ── Mechanism Section ──────────────────────────────────── */
.mechanism-section {
  padding: 6rem 1.5rem;
  max-width: var(--max-w-7xl);
  margin: 0 auto;
}

.mechanism-section__header {
  margin-bottom: 4rem;
}

.mechanism-section__title {
  font-family: var(--font-serif);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-on-surface);
  margin-bottom: 1rem;
}

@media (min-width: 768px) {
  .mechanism-section__title { font-size: 3rem; }
}

.mechanism-section__underline {
  width: 6rem;
  height: 4px;
  background-color: var(--color-tertiary);
}

.mechanism-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  margin-bottom: 5rem;
}

@media (min-width: 768px) {
  .mechanism-cards { grid-template-columns: repeat(2, 1fr); }
}

.mechanism-card {
  background-color: var(--color-surface-container-highest);
  padding: 2.5rem;
  border-top: 4px solid;
}

.mechanism-card--slate { border-color: #0f172a; }
.mechanism-card--primary { border-color: var(--color-primary); }

.mechanism-card__meta {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: #6b7280;
  text-transform: uppercase;
  letter-spacing: -0.025em;
  margin-bottom: 1rem;
}

.mechanism-card__title {
  font-family: var(--font-serif);
  font-size: 1.875rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
}

.mechanism-card__body {
  color: var(--color-on-surface-variant);
  line-height: 1.625;
}

/* Causal Chain */
.causal-chain {
  position: relative;
  padding: 3rem 2rem;
  background-color: #020617;
  color: #ffffff;
  overflow: hidden;
}

.causal-chain::before {
  content: '';
  position: absolute;
  inset: 0;
  opacity: 0.1;
  background: radial-gradient(circle at center, var(--color-secondary) 0%, transparent 70%);
  pointer-events: none;
}

.causal-chain__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

@media (min-width: 768px) {
  .causal-chain__grid { grid-template-columns: repeat(4, 1fr); }
}

.causal-step__letter {
  font-family: var(--font-mono);
  font-size: 1.875rem;
  font-weight: 700;
  color: var(--color-tertiary);
  margin-bottom: 0.5rem;
}

.causal-step__label {
  font-size: 0.875rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: #94a3b8;
}

/* ── Story Section (Margaret) ───────────────────────────── */
.story-section {
  background-color: #ffffff;
  padding: 6rem 1.5rem;
  overflow: hidden;
  border-top: 1px solid #f1f5f9;
  border-bottom: 1px solid #f1f5f9;
}

.story-section__inner {
  max-width: var(--max-w-7xl);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr;
  gap: 4rem;
  align-items: center;
}

@media (min-width: 1024px) {
  .story-section__inner { grid-template-columns: repeat(2, 1fr); }
}

.story-section__img {
  border-radius: var(--radius-sm);
  box-shadow: 0 20px 25px -5px rgba(0,0,0,0.1);
  filter: grayscale(100%);
  transition: filter 1000ms ease;
  max-width: 100%;
}

.story-section__img:hover { filter: grayscale(0%); }

.story-section__tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--color-secondary);
  font-weight: 700;
  margin-bottom: 1rem;
  display: block;
}

.story-section__title {
  font-family: var(--font-serif);
  font-size: 2.25rem;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1.5rem;
}

.story-section__body {
  color: var(--color-on-surface-variant);
  line-height: 1.625;
}

.story-section__body p + p { margin-top: 1.5rem; }

/* ── Social Proof / Testimonials ────────────────────────── */
.social-proof-section {
  background-color: #0f172a;
  color: #ffffff;
  padding: 6rem 1.5rem;
}

.social-proof-section__inner {
  max-width: var(--max-w-7xl);
  margin: 0 auto;
}

.social-proof-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
  margin-bottom: 6rem;
}

@media (min-width: 1024px) {
  .social-proof-stats { grid-template-columns: repeat(4, 1fr); }
}

.social-stat {
  text-align: center;
  padding: 2rem;
  border-bottom: 1px solid #1e293b;
}

@media (min-width: 1024px) {
  .social-stat {
    border-bottom: none;
    border-right: 1px solid #1e293b;
  }
  .social-stat:last-child { border-right: none; }
}

.social-stat__value {
  font-family: var(--font-serif);
  font-size: 3rem;
  font-weight: 700;
  color: var(--color-tertiary);
  margin-bottom: 0.5rem;
}

.social-stat__label {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: #94a3b8;
}

.testimonials-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

@media (min-width: 768px) {
  .testimonials-grid { grid-template-columns: repeat(3, 1fr); }
}

.testimonial-card {
  display: flex;
  flex-direction: column;
  background-color: rgba(30,41,59,0.5);
  border: 1px solid #334155;
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.testimonial-card__img-wrap {
  height: 16rem;
  overflow: hidden;
  position: relative;
}

.testimonial-card__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(100%);
  transition: filter var(--transition-slow);
}

.testimonial-card:hover .testimonial-card__img { filter: grayscale(0%); }

.testimonial-card__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, #0f172a, transparent);
  opacity: 0.6;
}

.testimonial-card__body {
  padding: 2rem;
  border-left: 4px solid var(--color-tertiary);
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.testimonial-card__quote {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1.125rem;
  color: #cbd5e1;
  margin-bottom: 1.5rem;
  line-height: 1.625;
}

.testimonial-card__author {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.testimonial-card__bar {
  width: 4px;
  height: 2rem;
  background-color: var(--color-tertiary);
}

.testimonial-card__name {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: #94a3b8;
  font-weight: 700;
}

/* ── Two Paths ──────────────────────────────────────────── */
.two-paths-section {
  padding: 6rem 1.5rem;
  max-width: var(--max-w-7xl);
  margin: 0 auto;
}

.two-paths-section__title {
  font-family: var(--font-serif);
  font-size: 2.25rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 4rem;
}

.two-paths-grid {
  display: grid;
  grid-template-columns: 1fr;
  border: 1px solid #e5e7eb;
  border-radius: var(--radius-sm);
  overflow: hidden;
  box-shadow: 0 25px 50px -12px rgba(0,0,0,0.1);
}

@media (min-width: 768px) {
  .two-paths-grid { grid-template-columns: repeat(2, 1fr); }
}

.path-card {
  padding: 3rem;
  border-bottom: 1px solid #e5e7eb;
}

@media (min-width: 768px) {
  .path-card {
    border-bottom: none;
    border-right: 1px solid #e5e7eb;
  }
  .path-card:last-child { border-right: none; }
}

.path-card--red { background-color: #fff1f2; }
.path-card--teal { background-color: #f0fdfa; }

.path-card__title {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
}

.path-card--red .path-card__title { color: var(--color-primary); }
.path-card--teal .path-card__title { color: var(--color-secondary); }

.path-card__list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.path-card__item {
  display: flex;
  gap: 0.75rem;
  color: var(--color-on-surface-variant);
  font-weight: 500;
}

.path-card__item .material-symbols-outlined {
  flex-shrink: 0;
  font-size: 1.5rem;
}

.path-card--red .path-card__item .material-symbols-outlined { color: var(--color-primary); }
.path-card--teal .path-card__item .material-symbols-outlined { color: var(--color-secondary); }

/* ── Imagine Section ────────────────────────────────────── */
.imagine-section {
  padding: 6rem 1.5rem;
  background-color: #f8fafc;
  border-top: 1px solid #f1f5f9;
  border-bottom: 1px solid #f1f5f9;
}

.imagine-section__inner {
  max-width: var(--max-w-6xl);
  margin: 0 auto;
}

.imagine-section__title {
  font-family: var(--font-serif);
  font-size: 2.5rem;
  font-weight: 700;
  text-align: center;
  color: var(--color-on-surface);
  margin-bottom: 5rem;
  line-height: 1.2;
}

@media (min-width: 768px) {
  .imagine-section__title { font-size: 3rem; }
}

.imagine-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4rem;
}

@media (min-width: 768px) {
  .imagine-grid { grid-template-columns: repeat(2, 1fr); }
}

.imagine-item {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 1rem;
}

.imagine-item__icon {
  width: 3rem;
  height: 3rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background-color: rgba(158,0,0,0.1);
  margin-bottom: 0.5rem;
  font-size: 1.875rem;
}

.imagine-item__text {
  font-family: var(--font-body);
  font-size: 1.125rem;
  color: var(--color-on-surface-variant);
  line-height: 1.625;
}

.imagine-item__text strong {
  color: var(--color-on-surface);
  display: block;
  margin-bottom: 0.5rem;
}

/* ── Final CTA ──────────────────────────────────────────── */
.research-final-cta {
  padding: 6rem 1.5rem;
  background-color: var(--color-surface-container);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.research-final-cta__title {
  font-family: var(--font-serif);
  font-size: 2.5rem;
  font-weight: 700;
  max-width: 48rem;
  margin-bottom: 2.5rem;
  line-height: 1.2;
}

@media (min-width: 768px) {
  .research-final-cta__title { font-size: 3rem; }
}

.research-final-cta__btn {
  display: inline-flex;
  align-items: center;
  gap: 1rem;
  background-color: var(--color-tertiary-container);
  color: var(--color-on-tertiary-container);
  padding: 1.5rem 3rem;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 1.25rem;
  border: none;
  cursor: pointer;
  transition: background-color var(--transition-base), box-shadow var(--transition-base);
  box-shadow: 0 10px 15px -3px rgba(0,0,0,0.1);
}

.research-final-cta__btn:hover {
  background-color: var(--color-tertiary);
  color: #ffffff;
}

.research-final-cta__btn .material-symbols-outlined {
  font-variation-settings: 'FILL' 1;
}

.research-final-cta__note {
  margin-top: 2rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: #6b7280;
}