/* =========================================================
   Daily News Digest — toss light/dark theme system
   themes: toss(light) | toss-dark(dark)
   ========================================================= */

/* ── Theme tokens ──────────────────────────────────────── */
:root {
  color-scheme: light;
  --bg: #f2f4f6;
  --brief-bg: #ffffff;       --brief-border: #dbe2ea; --brief-label: #6b7684;
  --counter-bg: #e8f1ff;
  --header-border: transparent; --foot-border: transparent;
  --border: transparent;     --border-hover: #e5e8eb;
  --text-1: #191f28;  --text-2: #4e5968;  --text-3: #6b7684;  --text-4: #8b95a1;
  --card-bg: #ffffff;        --card-hover-bg: #f8f9fa;
  --card-shadow: 0 2px 12px rgba(0,0,0,0.08);
  --card-hover-shadow: 0 4px 16px rgba(0,0,0,0.12);
  --card-padding: 16px 18px; --feed-gap: 10px;
  --pager-dot-bg: #e5e8eb;   --pager-dot-border: #e5e8eb;
  --pager-active-bg: #3182f6; --pager-active-border: #3182f6;
  --btn-bg: #3182f6; --btn-border: transparent; --btn-text: #ffffff;
  --focus-ring: #3182f6;
  --radius: 16px; --badge-radius: 20px;
  --c-ai: #6366f1; --c-tech: #3182f6; --c-econ: #f59e0b;
  --c-policy: #6b8f71; --c-world: #ef4444; --c-energy: #f97316; --c-society: #2a9d8f;
}

[data-theme="toss"] {
  color-scheme: light;
  --bg: #f2f4f6;
  --brief-bg: #ffffff;       --brief-border: #dbe2ea; --brief-label: #6b7684;
  --counter-bg: #e8f1ff;
  --header-border: transparent; --foot-border: transparent;
  --border: transparent;     --border-hover: #e5e8eb;
  --text-1: #191f28;  --text-2: #4e5968;  --text-3: #6b7684;  --text-4: #8b95a1;
  --card-bg: #ffffff;        --card-hover-bg: #f8f9fa;
  --card-shadow: 0 2px 12px rgba(0,0,0,0.08);
  --card-hover-shadow: 0 4px 16px rgba(0,0,0,0.12);
  --card-padding: 16px 18px; --feed-gap: 10px;
  --pager-dot-bg: #e5e8eb;   --pager-dot-border: #e5e8eb;
  --pager-active-bg: #3182f6; --pager-active-border: #3182f6;
  --btn-bg: #3182f6; --btn-border: transparent; --btn-text: #ffffff;
  --focus-ring: #3182f6;
  --radius: 16px; --badge-radius: 20px;
  --c-ai: #6366f1; --c-tech: #3182f6; --c-econ: #f59e0b;
  --c-policy: #6b8f71; --c-world: #ef4444; --c-energy: #f97316; --c-society: #2a9d8f;
}

[data-theme="toss-dark"] {
  color-scheme: dark;
  --bg: #0e1012;
  --brief-bg: #1b2736;       --brief-border: #28415b; --brief-label: #96a8bf;
  --counter-bg: #24415f;
  --header-border: transparent; --foot-border: transparent;
  --border: transparent;     --border-hover: #2d3035;
  --text-1: #f0f2f4;  --text-2: #d6dee8;  --text-3: #a8b6c7;  --text-4: #7f8b99;
  --card-bg: #212327;        --card-hover-bg: #272a2e;
  --card-shadow: 0 2px 12px rgba(0,0,0,0.3);
  --card-hover-shadow: 0 4px 16px rgba(0,0,0,0.4);
  --card-padding: 16px 18px; --feed-gap: 10px;
  --pager-dot-bg: #2d3035;   --pager-dot-border: #2d3035;
  --pager-active-bg: #3182f6; --pager-active-border: #3182f6;
  --btn-bg: #3182f6; --btn-border: transparent; --btn-text: #ffffff;
  --focus-ring: #3182f6;
  --radius: 16px; --badge-radius: 20px;
  --c-ai: #818cf8; --c-tech: #4ca3f0; --c-econ: #f5b731;
  --c-policy: #7a9a7e; --c-world: #f07070; --c-energy: #f5833a; --c-society: #3aa79b;
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; }

body {
  background: var(--bg);
  color: var(--text-1);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont,
    "Apple SD Gothic Neo", "Pretendard", "Noto Sans KR", system-ui, "Malgun Gothic", sans-serif;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  line-height: 1.5;
  min-height: 100dvh;
  transition: background 0.2s ease, color 0.2s ease;
}

/* ── Layout ── */
.app {
  width: 100%;
  max-width: 560px;
  margin: 0 auto;
  padding: 0 16px calc(40px + env(safe-area-inset-bottom));
}

/* ── Topbar ── */
.topbar {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  padding: calc(28px + env(safe-area-inset-top)) 0 16px;
  border-bottom: 1px solid var(--header-border);
  margin-bottom: 16px;
}
.topbar__date {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.2;
  color: var(--text-1);
}
.topbar__meta {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-top: 6px;
  font-size: 12px;
  color: var(--text-4);
  font-variant-numeric: tabular-nums;
}

/* ── Brief ── */
.brief {
  margin: 0 0 14px;
  padding: 14px 16px;
  background: var(--brief-bg);
  border: 1px solid var(--brief-border);
  border-radius: var(--radius);
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.06);
  transition: background 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}
.brief__label {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--brief-label);
  margin-bottom: 10px;
}
.brief__list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 9px;
  counter-reset: brief;
}
.brief__list li {
  position: relative;
  padding-left: 26px;
  counter-increment: brief;
}
.brief__list li::before {
  content: counter(brief);
  position: absolute;
  left: 0;
  top: 2px;
  width: 16px;
  height: 16px;
  border-radius: 3px;
  background: var(--counter-bg);
  color: var(--text-3);
  font-size: 10px;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
}
.brief__link {
  color: var(--text-1);
  text-decoration: none;
  font-size: clamp(11px, 3.15vw, 13px);
  font-weight: 600;
  line-height: 1.55;
}
.brief__link:hover { color: var(--text-1); }
.brief__link:focus-visible { outline: 2px solid var(--focus-ring); outline-offset: 2px; }
.brief__text { color: var(--text-1); font-size: clamp(11px, 3.15vw, 13px); font-weight: 600; line-height: 1.55; }

/* ── Feed ── */
.feed {
  display: flex;
  flex-direction: column;
  gap: var(--feed-gap);
  transition: opacity 0.15s ease;
}
.feed.is-sliding-left,
.feed.is-sliding-right { opacity: 0.38; }
.feed.is-settling { animation: feedFade 0.2s ease-out; }

@media (prefers-reduced-motion: no-preference) {
  .feed > .card { animation: cardIn 0.22s cubic-bezier(0.16,1,0.3,1) both; }
  .feed > .card:nth-child(1) { animation-delay: 0.02s; }
  .feed > .card:nth-child(2) { animation-delay: 0.05s; }
  .feed > .card:nth-child(3) { animation-delay: 0.08s; }
  .feed > .card:nth-child(4) { animation-delay: 0.11s; }
  .feed > .card:nth-child(5) { animation-delay: 0.14s; }
}

@keyframes cardIn {
  from { opacity: 0; transform: translateY(5px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes feedFade {
  from { opacity: 0.4; }
  to   { opacity: 1; }
}

/* ── Card ── */
.card {
  display: block;
  text-decoration: none;
  color: inherit;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--card-padding);
  box-shadow: var(--card-shadow);
  -webkit-tap-highlight-color: transparent;
  transition: background 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease;
}
.card:active { background: var(--card-hover-bg); }
.card:focus-visible { outline: 2px solid var(--focus-ring); outline-offset: 2px; }

@media (hover: hover) {
  .card:hover {
    background: var(--card-hover-bg);
    border-color: var(--border-hover);
    box-shadow: var(--card-hover-shadow);
  }
  .card:hover .go-arrow { color: var(--text-3); }
}

.card__head { display: flex; align-items: flex-start; gap: 10px; }
.card__body { flex: 1 1 auto; min-width: 0; }
.card__title {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: clamp(10.2px, 2.9vw, 12px);
  font-weight: 500;
  line-height: 1.45;
  letter-spacing: -0.01em;
  color: var(--text-1);
}
.card__headline-text {
  flex: 1 1 auto;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
[data-theme="toss"] .card__title,
[data-theme="toss-dark"] .card__title { font-weight: 600; font-size: clamp(10.2px, 2.9vw, 12px); }

/* ── Category badge ── */
.cat-tag {
  display: inline-flex;
  align-items: center;
  font-size: 10.5px;
  font-weight: 600;
  padding: 2px 7px;
  border-radius: var(--badge-radius);
  letter-spacing: 0.02em;
  white-space: nowrap;
  flex-shrink: 0;
}

/* ── Arrow ── */
.go-arrow {
  flex: none;
  width: 14px;
  height: 14px;
  margin-top: 3px;
  color: var(--text-4);
  transition: color 0.15s;
}

/* ── Focus ── */
.brief__link:focus-visible,
.pager__dot:focus-visible,
.card:focus-visible {
  outline: 2px solid var(--focus-ring);
  outline-offset: 2px;
}

/* ── Pager ── */
.pager {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  margin-top: 18px;
}
.pager__dot {
  width: 6px;
  height: 6px;
  padding: 0;
  border-radius: 999px;
  border: 1px solid var(--pager-dot-border);
  background: var(--pager-dot-bg);
  cursor: pointer;
  transition: background 0.12s ease, width 0.15s ease, border-color 0.12s ease;
  -webkit-tap-highlight-color: transparent;
}
.pager__dot.is-active {
  width: 18px;
  background: var(--pager-active-bg);
  border-color: var(--pager-active-border);
}
@media (hover: hover) {
  .pager__dot:not(.is-active):hover { background: var(--border-hover); }
}

/* ── Theme button ── */
.theme-btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 5px 12px;
  border-radius: 999px;
  border: 1px solid var(--btn-border);
  background: var(--btn-bg);
  color: var(--btn-text);
  font-size: 11px;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  letter-spacing: 0.02em;
  white-space: nowrap;
  -webkit-tap-highlight-color: transparent;
  transition: opacity 0.1s, background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
  flex-shrink: 0;
}
.theme-btn:hover { opacity: 0.82; }
.theme-btn:active { opacity: 0.6; }

/* ── Footer ── */
.foot {
  text-align: center;
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px solid var(--foot-border);
  font-size: 11px;
  color: var(--text-4);
}

/* ── State ── */
.state {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-4);
  font-size: 13px;
}