/* ============================================================
   Layout — page-level containers and structural rhythm
   ============================================================ */

body {
  background: var(--color-bg-primary);
  color: var(--color-text-primary);
  font-family: var(--font-display);
  font-size: 16px;
  line-height: 1.5;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow-x: clip;
}

.site-main {
  flex: 1 0 auto;
  position: relative;
  z-index: 1;
}

.feed,
.article {
  position: relative;
  z-index: 1;
}

/* ----- Feed page (wallet-pattern grid) -------------------- */

.feed {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 48px 20px 96px;
}

@media (min-width: 768px) {
  .feed {
    padding: 80px 32px 128px;
  }
}

.feed__header {
  margin-bottom: 32px;
}

.feed__title {
  font-family: var(--font-display);
  font-size: 32px;
  line-height: 1.1;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--color-text-primary);
}

@media (min-width: 768px) {
  .feed__title {
    font-size: 48px;
  }
}

.feed__subtitle {
  margin-top: 16px;
  font-family: var(--font-display);
  font-size: 16px;
  line-height: 1.5;
  font-weight: 400;
  color: var(--color-text-secondary);
  max-width: 640px;
}

@media (min-width: 768px) {
  .feed__subtitle {
    font-size: 18px;
  }
}

.feed__toolbar {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 32px;
}

@media (min-width: 768px) {
  .feed__toolbar {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 40px;
  }
}

.feed__search {
  position: relative;
  display: inline-flex;
  align-items: center;
  width: 100%;
  max-width: 360px;
}

.feed__search-icon {
  position: absolute;
  left: 14px;
  color: var(--color-text-tertiary);
  pointer-events: none;
}

.feed__search-input {
  width: 100%;
  height: 44px;
  padding: 0 14px 0 42px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-full);
  font-family: var(--font-display);
  font-size: 15px;
  color: var(--color-text-primary);
}

.feed__search-input::placeholder {
  color: var(--color-text-tertiary);
}

.feed__search-input:focus {
  outline: none;
  border-color: var(--color-border-focus);
  background: rgba(255, 255, 255, 0.06);
}

.feed__sort {
  position: relative;
  display: inline-flex;
  align-items: center;
}

.feed__sort-select {
  appearance: none;
  -webkit-appearance: none;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-full);
  height: 44px;
  padding: 0 42px 0 18px;
  font-family: var(--font-display);
  font-size: 15px;
  color: var(--color-text-primary);
  cursor: pointer;
}

.feed__sort-select:focus {
  outline: none;
  border-color: var(--color-border-focus);
}

.feed__sort-chevron {
  position: absolute;
  right: 14px;
  color: var(--color-text-tertiary);
  pointer-events: none;
}

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.feed__grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

@media (min-width: 640px) {
  .feed__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px;
  }
}

@media (min-width: 1024px) {
  .feed__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
  }
}

.feed__empty {
  margin-top: 32px;
  font-family: var(--font-display);
  font-size: 15px;
  color: var(--color-text-tertiary);
}

/* ----- Article page ---------------------------------------- */

.article {
  width: 100%;
  max-width: 680px;
  margin: 0 auto;
  padding: 56px 20px 96px;
}

@media (min-width: 768px) {
  .article {
    padding: 96px 32px 128px;
  }
}

.article__back {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  color: var(--color-text-tertiary);
  transition: color var(--duration-fast) var(--ease-standard);
}

.article__back:hover {
  color: var(--color-text-secondary);
}

.article__back svg {
  width: 16px;
  height: 16px;
  stroke-width: 1.5;
}

/* ----- Hero (wallet-pattern: starts at viewport top, no chrome above) ---- */

.article__hero {
  position: relative;
  margin: -56px -20px 0; /* escape the .article top + side padding (mobile) */
  height: 460px;
  border-radius: 0 0 28px 28px;
  overflow: hidden;
  background: var(--color-bg-elevated);
  z-index: 1;
}

.article__hero img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

@media (min-width: 768px) {
  .article__hero {
    margin: -96px -32px 0;
    height: 480px;
    border-radius: 0 0 36px 36px;
  }
}

.article__back--on-hero {
  position: absolute;
  top: 24px;
  left: 24px;
  z-index: 2;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px 8px 10px;
  border-radius: var(--radius-full);
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0;
  text-transform: none;
  color: var(--color-text-primary);
  background: rgba(7, 7, 12, 0.45);
  -webkit-backdrop-filter: blur(12px);
          backdrop-filter: blur(12px);
  transition: background var(--duration-fast) var(--ease-standard);
}

.article__back--on-hero:hover {
  background: rgba(7, 7, 12, 0.65);
  color: var(--color-text-primary);
}

.article__back--on-hero svg {
  width: 20px;
  height: 20px;
  stroke-width: 1.75;
}

@media (min-width: 768px) {
  .article__back--on-hero {
    top: 32px;
    left: 32px;
  }
}

.article__header {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-top: 32px;
}

@media (min-width: 768px) {
  .article__header {
    gap: 20px;
    margin-top: 48px;
  }
}

.article__title {
  font-family: var(--font-display);
  font-size: 30px;
  line-height: 1.2;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--color-text-primary);
  margin: 0;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

@media (min-width: 768px) {
  .article__title {
    font-size: 40px;
    line-height: 1.15;
  }
}

.article__dek {
  font-family: var(--font-display);
  font-size: 18px;
  line-height: 1.5;
  font-weight: 400;
  font-style: italic; /* matches wallet pattern; documented exception to Hard Rule #5 for the article dek only */
  color: var(--color-text-secondary);
  margin: 0;
}

@media (min-width: 768px) {
  .article__dek {
    font-size: 20px;
    line-height: 1.45;
  }
}

.article__byline {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-top: 4px;
}

.article__publisher,
.article__reading {
  font-family: var(--font-display);
  font-size: 14px;
  line-height: 1.5;
  margin: 0;
}

.article__publisher {
  color: var(--color-text-secondary);
  font-weight: 500;
}

.article__reading {
  color: var(--color-text-tertiary);
}

.article__subtitle {
  /* kept for backward-compat; not used in new wallet-pattern header. */
  margin-top: 24px;
  font-family: var(--font-display);
  font-size: 18px;
  line-height: 1.4;
  font-weight: 400;
  color: var(--color-text-secondary);
}

@media (min-width: 768px) {
  .article__subtitle {
    font-size: 20px;
  }
}

.article__meta {
  margin-top: 32px;
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.article__divider {
  margin-top: 48px;
  margin-bottom: 48px;
  border: 0;
  border-top: 1px solid var(--color-border-default);
}

.article__footer {
  margin-top: 64px;
}

.article__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.article__after-tags {
  margin-top: 48px;
}

.article__read-next {
  margin-top: 48px;
}