/**
 * Knowledge Hub — inner pages (Healthy Sleep Tips, Mattress Guide, Sleep Products Care).
 * All selectors live under .intercoil-inner-page (see inner-pages.css notes).
 *
 * Structure:
 *   1. Page tokens
 *   2. Opening (statement + prose)
 *   3. Split rows (editorial media/text)
 *   4. Guide (sticky cinematic numbered entries — Mattress Guide signature)
 *   5. Mosaic (asymmetric showroom composition)
 *   6. Quality frame (layered-composition extension — Sleep Tips signature)
 *   7. Statement band (Sleep Products Care)
 *   8. Closing + buttons
 *   9. Mobile overrides
 *  10. Reduced motion
 *
 * Reuse notes:
 *   - Hero shell, glows, grain, fade come from inner-pages.css (.inner-hero).
 *   - The Sleep Tips signature reuses the shared .layered-composition frame;
 *     only its heading is added here.
 *   - The Mattress Guide signature reuses the shared .media-row--cinematic
 *     sticky treatment; only the entry typography is added here.
 *   - Scroll reveals use the shared .reveal-up / .reveal-mask utilities.
 */

/* ════════════════════════════════════════════════════════════
   1. PAGE TOKENS
   ════════════════════════════════════════════════════════════ */

.intercoil-inner-page.knowledge-page {
  --knowledge-ink: #39415c;
}

/* ════════════════════════════════════════════════════════════
   2. OPENING — magazine-style intro
   Gradient statement, then supporting prose. Shared by all
   three Knowledge Hub pages so the family reads as one.
   ════════════════════════════════════════════════════════════ */

.intercoil-inner-page .knowledge-opening {
  position: relative;
  padding: clamp(40px, 6vw, 90px) 0 clamp(56px, 8vw, 100px);
}

.intercoil-inner-page .knowledge-opening__statement {
  margin: 0;
  max-width: 34ch;
  font-size: clamp(1.6rem, 3.3vw, 2.7rem);
  font-weight: 600;
  line-height: 1.28;
  letter-spacing: -0.015em;
  background: var(--grad-heading-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: var(--color-navy);
}

.intercoil-inner-page .knowledge-opening__columns {
  margin-top: clamp(30px, 4.5vw, 48px);
  max-width: 1060px;
}

@media (min-width: 800px) {
  .intercoil-inner-page .knowledge-opening__columns--two {
    columns: 2;
    column-gap: clamp(48px, 6vw, 90px);
  }
}

.intercoil-inner-page .knowledge-opening__prose {
  margin: 0 0 1.4em;
  max-width: 68ch;
  font-size: clamp(1rem, 1.4vw, 1.125rem);
  line-height: 1.8;
  color: var(--knowledge-ink);
  break-inside: avoid;
}

.intercoil-inner-page .knowledge-opening__prose:last-child {
  margin-bottom: 0;
}

/* ════════════════════════════════════════════════════════════
   3. SPLIT ROWS — layered editorial media/text
   ════════════════════════════════════════════════════════════ */

.intercoil-inner-page .knowledge-split {
  padding-top: var(--inner-pad);
}

.intercoil-inner-page .knowledge-opening + .knowledge-split {
  padding-top: clamp(30px, 4vw, 60px);
}

.intercoil-inner-page .knowledge-split__layout {
  display: grid;
  gap: clamp(40px, 6vw, 80px);
  align-items: center;
}

@media (min-width: 900px) {
  .intercoil-inner-page .knowledge-split__layout {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: clamp(56px, 8vw, 110px);
  }

  .intercoil-inner-page .knowledge-split--reverse .knowledge-split__media {
    order: 2;
  }
}

.intercoil-inner-page .knowledge-split__media {
  position: relative;
}

.intercoil-inner-page .knowledge-split__figure {
  margin: 0;
  aspect-ratio: 4 / 3;
  border-radius: var(--radius-img);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.intercoil-inner-page .knowledge-split__figure img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.9s var(--inner-ease);
}

.intercoil-inner-page .knowledge-split__media:hover .knowledge-split__figure img {
  transform: scale(1.035);
}

.intercoil-inner-page .knowledge-split__figure-accent {
  position: absolute;
  right: -6%;
  bottom: -12%;
  width: 40%;
  aspect-ratio: 1 / 1;
  margin: 0;
  border-radius: var(--radius-img);
  border: 6px solid var(--color-white);
  overflow: hidden;
  box-shadow: var(--shadow-hover);
}

.intercoil-inner-page .knowledge-split--reverse .knowledge-split__figure-accent {
  right: auto;
  left: -6%;
}

.intercoil-inner-page .knowledge-split__figure-accent img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.intercoil-inner-page .knowledge-split__title {
  margin: 0 0 clamp(20px, 3vw, 30px);
  max-width: 20ch;
  font-size: clamp(1.75rem, 3.2vw, 2.6rem);
  font-weight: 700;
  line-height: 1.18;
  letter-spacing: -0.02em;
  color: var(--color-navy);
}

.intercoil-inner-page .knowledge-split__text {
  margin: 0 0 1.35em;
  max-width: 56ch;
  font-size: clamp(1rem, 1.35vw, 1.1rem);
  line-height: 1.8;
  color: var(--knowledge-ink);
}

.intercoil-inner-page .knowledge-split__text:last-child {
  margin-bottom: 0;
}

/* ════════════════════════════════════════════════════════════
   4. GUIDE — numbered entries beside a sticky photograph
   The Mattress Guide's signature: the shared cinematic media
   row carries the image; entry typography lives here.
   ════════════════════════════════════════════════════════════ */

.intercoil-inner-page .knowledge-guide {
  padding-top: var(--inner-pad);
}

.intercoil-inner-page .knowledge-guide__head {
  max-width: 760px;
  margin-bottom: clamp(44px, 6vw, 70px);
}

.intercoil-inner-page .knowledge-guide__title {
  margin: 0;
  font-size: clamp(1.75rem, 3.2vw, 2.6rem);
  font-weight: 700;
  line-height: 1.18;
  letter-spacing: -0.02em;
  color: var(--color-navy);
}

.intercoil-inner-page .knowledge-guide__entries {
  display: flex;
  flex-direction: column;
  gap: clamp(44px, 6vw, 72px);
}

.intercoil-inner-page .knowledge-guide__entry-title {
  margin: 0 0 clamp(12px, 1.8vw, 18px);
  font-size: clamp(1.35rem, 2.2vw, 1.8rem);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.015em;
  color: var(--color-navy);
}

.intercoil-inner-page .knowledge-guide__entry-text {
  margin: 0;
  max-width: 58ch;
  font-size: clamp(1rem, 1.35vw, 1.1rem);
  line-height: 1.8;
  color: var(--knowledge-ink);
}

/* ════════════════════════════════════════════════════════════
   5. MOSAIC — asymmetric showroom composition
   One dominant frame with two supporting frames. Purely visual.
   ════════════════════════════════════════════════════════════ */

.intercoil-inner-page .knowledge-mosaic {
  padding-top: var(--inner-pad);
}

.intercoil-inner-page .knowledge-mosaic__layout {
  display: grid;
  gap: clamp(12px, 1.8vw, 24px);
}

@media (min-width: 760px) {
  .intercoil-inner-page .knowledge-mosaic__layout {
    grid-template-columns: 1.5fr 1fr;
    grid-template-rows: repeat(2, minmax(0, 1fr));
    height: clamp(420px, 52vw, 640px);
  }

  .intercoil-inner-page .knowledge-mosaic__item--1 {
    grid-row: 1 / span 2;
  }
}

.intercoil-inner-page .knowledge-mosaic__item {
  margin: 0;
  border-radius: var(--radius-img);
  overflow: hidden;
  min-height: 0;
}

@media (max-width: 759px) {
  .intercoil-inner-page .knowledge-mosaic__item {
    aspect-ratio: 16 / 10;
  }

  .intercoil-inner-page .knowledge-mosaic__item--1 {
    aspect-ratio: 4 / 3;
  }
}

.intercoil-inner-page .knowledge-mosaic__item img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.9s var(--inner-ease);
}

.intercoil-inner-page .knowledge-mosaic__item:hover img {
  transform: scale(1.035);
}

/* ════════════════════════════════════════════════════════════
   6. QUALITY FRAME — heading inside the shared layered
   composition (Sleep Tips signature)
   ════════════════════════════════════════════════════════════ */

.intercoil-inner-page .knowledge-quality {
  padding-bottom: 0;
}

.intercoil-inner-page .knowledge-quality__title {
  margin: 0 0 clamp(18px, 2.5vw, 26px);
  max-width: 16ch;
  font-size: clamp(1.75rem, 3.2vw, 2.6rem);
  font-weight: 700;
  line-height: 1.18;
  letter-spacing: -0.02em;
  color: var(--color-navy);
}

/* ════════════════════════════════════════════════════════════
   7. STATEMENT BAND — one quiet idea on the off-white surface
   (Sleep Products Care — Healthy Sleep Habits)
   ════════════════════════════════════════════════════════════ */

.intercoil-inner-page .knowledge-statement {
  position: relative;
  margin-top: var(--inner-pad);
  padding: var(--inner-pad) 0;
  background: var(--color-off-white);
  overflow: hidden;
}

.intercoil-inner-page .knowledge-statement__inner {
  position: relative;
  z-index: 1;
  max-width: min(860px, 100%);
  margin-inline: auto;
  text-align: center;
}

.intercoil-inner-page .knowledge-statement__title {
  margin: 0 0 clamp(20px, 3vw, 30px);
  font-size: clamp(1.75rem, 3.2vw, 2.6rem);
  font-weight: 700;
  line-height: 1.18;
  letter-spacing: -0.02em;
  color: var(--color-navy);
}

.intercoil-inner-page .knowledge-statement__text {
  margin: 0 auto;
  max-width: 52ch;
  font-size: clamp(1.2rem, 2vw, 1.6rem);
  font-weight: 300;
  line-height: 1.65;
  color: var(--knowledge-ink);
}

/* ════════════════════════════════════════════════════════════
   8. CLOSING + BUTTONS
   ════════════════════════════════════════════════════════════ */

.intercoil-inner-page .knowledge-closing {
  position: relative;
  display: flex;
  align-items: center;
  min-height: clamp(480px, 66vh, 640px);
  margin-top: var(--inner-pad);
  padding: clamp(90px, 12vw, 140px) 0;
  isolation: isolate;
  overflow: hidden;
  color: var(--color-white);
}

.intercoil-inner-page .knowledge-statement + .knowledge-closing {
  margin-top: 0;
}

.intercoil-inner-page .knowledge-closing__media {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.intercoil-inner-page .knowledge-closing__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.intercoil-inner-page .knowledge-closing__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    120deg,
    rgba(0, 8, 56, 0.92) 0%,
    rgba(0, 31, 140, 0.55) 55%,
    rgba(0, 8, 56, 0.86) 100%
  );
}

.intercoil-inner-page .knowledge-closing__inner {
  position: relative;
  z-index: 1;
  text-align: center;
}

.intercoil-inner-page .knowledge-closing__quote {
  margin: 0 auto clamp(24px, 3.5vw, 36px);
  max-width: 32ch;
  font-size: clamp(1.7rem, 3.8vw, 2.9rem);
  font-weight: 700;
  line-height: 1.24;
  letter-spacing: -0.02em;
  text-shadow: 0 4px 40px rgba(0, 0, 0, 0.35);
}

.intercoil-inner-page .knowledge-closing__tagline {
  margin: 0 auto clamp(36px, 5.5vw, 56px);
  max-width: 44ch;
  font-size: clamp(1.05rem, 1.8vw, 1.35rem);
  font-weight: 300;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.82);
}

.intercoil-inner-page .knowledge-closing__actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 16px;
}

.intercoil-inner-page .knowledge-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 16px 32px;
  border-radius: var(--radius-btn);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  text-decoration: none;
  transition: transform 0.4s var(--inner-ease), box-shadow 0.4s var(--inner-ease), background 0.4s ease;
}

.intercoil-inner-page .knowledge-btn--primary {
  background: var(--color-white);
  color: var(--color-navy);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.2);
}

.intercoil-inner-page .knowledge-btn--primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 20px 52px rgba(0, 0, 0, 0.26);
}

.intercoil-inner-page .knowledge-btn__arrow {
  transition: transform 0.4s var(--inner-ease);
}

.intercoil-inner-page .knowledge-btn--primary:hover .knowledge-btn__arrow {
  transform: translateX(4px);
}

.intercoil-inner-page .knowledge-btn--ghost {
  color: var(--color-white);
  background: rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.intercoil-inner-page .knowledge-btn--ghost:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: translateY(-3px);
}

/* ════════════════════════════════════════════════════════════
   9. MOBILE OVERRIDES
   ════════════════════════════════════════════════════════════ */

@media (max-width: 899px) {
  .intercoil-inner-page .knowledge-split__figure-accent {
    display: none;
  }
}

@media (max-width: 640px) {
  .intercoil-inner-page .knowledge-closing__actions .knowledge-btn {
    width: 100%;
    justify-content: center;
  }
}

/* ════════════════════════════════════════════════════════════
   10. REDUCED MOTION
   (Shared reveal utilities are already handled in motion.css.)
   ════════════════════════════════════════════════════════════ */

@media (prefers-reduced-motion: reduce) {
  .intercoil-inner-page .knowledge-split__figure img,
  .intercoil-inner-page .knowledge-mosaic__item img,
  .intercoil-inner-page .knowledge-btn {
    transition: none !important;
  }

  .intercoil-inner-page .knowledge-btn:hover {
    transform: none;
  }
}