/* ============================================================
   North Wire — design tokens
   Spruce (deep forest) + Birch (warm paper) + Frost (glacier blue)
   Cranberry as the single signature accent — used only for the
   freshness dot and the active-tab underline, nowhere else.
   ============================================================ */

:root {
  --spruce:        #123128;
  --spruce-light:  #1E4A3B;
  --birch:         #F7F2E6;
  --birch-dim:     #EFE7D4;
  --frost:         #C9DBDD;
  --ink:           #16211D;
  --steel:         #5C6B63;
  --cranberry:     #A3402E;
  --cranberry-dim: rgba(163, 64, 46, 0.10);

  --cat-world:      #3B6E91;
  --cat-canada:     #123128;
  --cat-bc:         #4C6B3F;
  --cat-politics:   #7A5C3E;
  --cat-markets:    #A3402E;
  --cat-technology: #4A5FA0;
  --cat-science:    #2F7D6B;
  --cat-medical:    #8E4585;
  --cat-travel:     #C08A3E;

  --font-display: 'Fraunces', Georgia, serif;
  --font-body: 'Public Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'IBM Plex Mono', ui-monospace, monospace;

  --radius: 14px;
  --shadow-card: 0 1px 2px rgba(18, 49, 40, 0.06), 0 4px 14px rgba(18, 49, 40, 0.05);
}

* { box-sizing: border-box; }

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}

html, body {
  margin: 0;
  padding: 0;
  background: var(--birch);
  color: var(--ink);
  font-family: var(--font-body);
  -webkit-font-smoothing: antialiased;
}

body {
  padding-bottom: env(safe-area-inset-bottom);
}

.app {
  max-width: 640px;
  margin: 0 auto;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ---------------- Masthead ---------------- */

.masthead {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--spruce);
  color: var(--birch);
  padding: calc(env(safe-area-inset-top) + 14px) 20px 0;
  border-bottom: 1px solid rgba(247, 242, 230, 0.12);
}

.masthead-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 6px;
}

.dateline-today {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--frost);
}

.refresh-btn {
  background: none;
  border: 1px solid rgba(247, 242, 230, 0.25);
  color: var(--birch);
  border-radius: 100px;
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  cursor: pointer;
  transition: transform 0.5s ease, background 0.15s ease;
}
.refresh-btn:hover { background: rgba(247, 242, 230, 0.08); }
.refresh-btn:active { transform: rotate(180deg); }
.refresh-btn:focus-visible { outline: 2px solid var(--frost); outline-offset: 2px; }

.wordmark {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 32px;
  line-height: 1;
  margin: 2px 0 4px;
  letter-spacing: -0.01em;
}
.wordmark-accent {
  font-style: italic;
  font-weight: 500;
  color: var(--frost);
}

.tagline {
  font-size: 13px;
  color: var(--frost);
  margin: 0 0 14px;
  opacity: 0.85;
}

.chips {
  display: flex;
  gap: 6px;
  overflow-x: auto;
  padding-bottom: 12px;
  scrollbar-width: none;
}
.chips::-webkit-scrollbar { display: none; }

.chip {
  flex: 0 0 auto;
  background: transparent;
  color: var(--frost);
  border: none;
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 600;
  padding: 6px 4px 10px;
  cursor: pointer;
  position: relative;
  white-space: nowrap;
}
.chip::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 2px;
  background: transparent;
  border-radius: 2px;
  transition: background 0.15s ease;
}
.chip.is-active {
  color: var(--birch);
}
.chip.is-active::after {
  background: var(--cranberry);
}
.chip:focus-visible { outline: 2px solid var(--frost); outline-offset: 2px; }

/* ---------------- Feed ---------------- */

.feed {
  padding: 16px 16px 8px;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.card {
  background: #fff;
  border: 1px solid var(--birch-dim);
  border-radius: var(--radius);
  padding: 16px;
  box-shadow: var(--shadow-card);
  animation: rise 0.28s ease both;
}

@keyframes rise {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: none; }
}

.card-dateline {
  display: flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--steel);
  margin: 0 0 8px;
}

.cat-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  flex: 0 0 auto;
}

.card-headline {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 17px;
  line-height: 1.3;
  margin: 0 0 6px;
}
.card-headline a {
  color: var(--ink);
  text-decoration: none;
}
.card-headline a:hover { color: var(--spruce-light); }
.card-headline a:focus-visible { outline: 2px solid var(--spruce-light); outline-offset: 3px; border-radius: 2px; }

.card-summary {
  font-size: 14.5px;
  line-height: 1.5;
  color: var(--ink);
  opacity: 0.78;
  margin: 0;
}

/* Featured (top) story gets more room */
.card--featured {
  padding: 20px 18px;
  background: linear-gradient(180deg, #fff 0%, var(--birch-dim) 220%);
}
.card--featured .card-headline {
  font-size: 22px;
  line-height: 1.25;
}
.card--featured::before {
  content: "TOP STORY";
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--cranberry);
  background: var(--cranberry-dim);
  padding: 3px 8px;
  border-radius: 100px;
  margin-bottom: 10px;
}

.section-label {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--steel);
  margin: 8px 2px 0;
}

/* ---------------- Loading / empty states ---------------- */

.loading-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  padding: 60px 20px;
  color: var(--steel);
  font-size: 13px;
}

.spinner {
  width: 22px;
  height: 22px;
  border: 2.5px solid var(--frost);
  border-top-color: var(--spruce);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.empty-state {
  padding: 60px 24px;
  text-align: center;
}
.empty-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 19px;
  margin: 0 0 6px;
}
.empty-body {
  font-size: 14px;
  color: var(--steel);
  max-width: 320px;
  margin: 0 auto;
}

/* ---------------- Footer ---------------- */

.app-footer {
  padding: 18px 20px 28px;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--steel);
  letter-spacing: 0.04em;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.feedback-link {
  color: var(--cranberry);
  text-decoration: none;
  font-weight: 600;
}
.feedback-link:hover { text-decoration: underline; }

/* ---------------- Desktop niceties ---------------- */

@media (min-width: 640px) {
  .app { border-left: 1px solid var(--birch-dim); border-right: 1px solid var(--birch-dim); }
  .card:hover { box-shadow: 0 2px 4px rgba(18,49,40,0.08), 0 8px 20px rgba(18,49,40,0.07); }
}