/* ==========================================================================
   ちい活ニュース: style.css
   Tone: "推し活仲間のノート", a warm, hand-kept fan notebook.
   Palette: cream paper + green ink + soft pink highlighter.
   ========================================================================== */

:root {
  --color-bg: #FBF8F1;
  --color-paper: #FFFFFF;
  --color-paper-dim: #F5F0E4;
  --color-ink: #2E3B32;
  --color-ink-soft: #5B6B5E;
  --color-green: #4CAF7D;
  --color-green-dark: #35875F;
  --color-green-pale: #E3F3EA;
  --color-pink: #F4A6B7;
  --color-pink-pale: #FCE9ED;
  --color-yellow: #F6C453;
  --color-yellow-pale: #FDF1D6;
  --color-blue: #6FA8DC;
  --color-blue-pale: #E7F0FB;
  --color-border: #D8CFB8;

  --radius-lg: 26px;
  --radius-md: 18px;
  --radius-sm: 12px;

  --shadow-card: 0 6px 0 rgba(46, 59, 50, 0.06), 0 14px 30px -18px rgba(46, 59, 50, 0.35);
  --shadow-card-hover: 0 10px 0 rgba(46, 59, 50, 0.07), 0 22px 40px -18px rgba(46, 59, 50, 0.4);

  --font-body: "Zen Maru Gothic", "Hiragino Maru Gothic ProN", "Yu Gothic", sans-serif;

  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2.25rem;
  --space-5: 3.5rem;
}

* {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font-body);
  background:
    radial-gradient(circle at 8% 4%, rgba(76, 175, 125, 0.08), transparent 40%),
    radial-gradient(circle at 92% 12%, rgba(244, 166, 183, 0.10), transparent 38%),
    var(--color-bg);
  color: var(--color-ink);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

main {
  padding-bottom: calc(84px + env(safe-area-inset-bottom));
}

.tab-panel[hidden] {
  display: none;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: var(--color-green-dark);
}

button {
  font-family: inherit;
}

/* ---------------------------------------------------------------------- */
/* Header                                                                  */
/* ---------------------------------------------------------------------- */

.site-header {
  position: relative;
  padding: var(--space-4) var(--space-2) var(--space-5);
  background: linear-gradient(180deg, #E6F5EC 0%, var(--color-bg) 100%);
  text-align: center;
  overflow: hidden;
}

.site-header::before,
.site-header::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  opacity: 0.5;
}

.site-header::before {
  width: 140px;
  height: 140px;
  background: var(--color-green-pale);
  top: -60px;
  left: -40px;
}

.site-header::after {
  width: 90px;
  height: 90px;
  background: var(--color-pink-pale);
  bottom: -30px;
  right: -20px;
}

.site-header__inner {
  position: relative;
  z-index: 1;
  max-width: 640px;
  margin: 0 auto;
}

.site-header__kicker {
  margin: 0 0 var(--space-1);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--color-green-dark);
  text-transform: uppercase;
}

.site-header__title {
  margin: 0;
  font-size: clamp(2rem, 1.6rem + 3vw, 3rem);
  font-weight: 900;
  color: var(--color-ink);
  letter-spacing: 0.02em;
}

.site-header__title-deco {
  display: inline-block;
  transform: rotate(-8deg);
  margin-right: 0.15em;
}

.site-header__subtitle {
  margin: var(--space-1) 0 0;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-ink-soft);
}

/* ---------------------------------------------------------------------- */
/* Filter tabs                                                             */
/* ---------------------------------------------------------------------- */

.filter-section {
  position: sticky;
  top: 0;
  z-index: 10;
  padding: var(--space-2) 0;
  background: rgba(251, 248, 241, 0.92);
  backdrop-filter: blur(6px);
  border-bottom: 2px dashed var(--color-border);
}

.filter-tabs {
  display: flex;
  gap: 0.5rem;
  overflow-x: auto;
  padding: 0 var(--space-2);
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

.filter-tabs::-webkit-scrollbar {
  height: 6px;
}

.filter-tabs::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: 4px;
}

.filter-tab {
  flex: 0 0 auto;
  padding: 0.55em 1.1em;
  border-radius: 999px;
  border: 2px solid var(--color-border);
  background: var(--color-paper);
  color: var(--color-ink-soft);
  font-weight: 700;
  font-size: 0.88rem;
  cursor: pointer;
  transition: transform 0.15s ease, background-color 0.15s ease, color 0.15s ease, border-color 0.15s ease;
  white-space: nowrap;
}

.filter-tab:hover {
  border-color: var(--color-green);
  color: var(--color-green-dark);
  transform: translateY(-2px);
}

.filter-tab:focus-visible {
  outline: 3px solid var(--color-green);
  outline-offset: 2px;
}

.filter-tab.is-active {
  background: var(--color-green);
  border-color: var(--color-green);
  color: #fff;
  box-shadow: 0 4px 0 var(--color-green-dark);
  transform: translateY(-2px);
}

/* ---------------------------------------------------------------------- */
/* Section heading                                                         */
/* ---------------------------------------------------------------------- */

.section-heading {
  padding: var(--space-4) var(--space-2) var(--space-2);
  max-width: 1080px;
  margin: 0 auto;
}

.section-heading__title {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0;
  font-size: 1.35rem;
  font-weight: 700;
}

.section-heading__icon {
  font-size: 1.2rem;
}

.section-heading__note {
  margin: 0.35rem 0 0 1.7rem;
  font-size: 0.82rem;
  color: var(--color-ink-soft);
}

/* ---------------------------------------------------------------------- */
/* Event grid + card                                                       */
/* ---------------------------------------------------------------------- */

.events-section,
.spots-section,
.about-section {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 var(--space-2);
}

.event-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2);
  padding-bottom: var(--space-2);
}

@media (min-width: 720px) {
  .event-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.event-card {
  position: relative;
  background: var(--color-paper);
  border: 2px dashed var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-3);
  box-shadow: var(--shadow-card);
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}

.event-card:hover,
.event-card:focus-within {
  transform: translateY(-4px) rotate(-0.3deg);
  box-shadow: var(--shadow-card-hover);
  border-color: var(--color-green);
}

.event-card__top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.6rem;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.3em;
  padding: 0.28em 0.85em;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.badge--cafe {
  background: var(--color-pink-pale);
  color: #B24E68;
}

.badge--popup {
  background: var(--color-yellow-pale);
  color: #8A6416;
}

.badge--event {
  background: var(--color-green-pale);
  color: var(--color-green-dark);
}

.badge--campaign {
  background: var(--color-blue-pale);
  color: #3868A0;
}

.badge--onsale {
  background: var(--color-green-pale);
  color: var(--color-green-dark);
}

.badge--preorder {
  background: var(--color-pink-pale);
  color: #B24E68;
}

.badge--upcoming {
  background: var(--color-blue-pale);
  color: #3868A0;
}

.status-stamp {
  display: inline-flex;
  align-items: center;
  gap: 0.3em;
  padding: 0.28em 0.75em;
  border-radius: var(--radius-sm);
  font-size: 0.68rem;
  font-weight: 700;
  border: 2px solid currentColor;
  transform: rotate(-4deg);
}

.status-stamp--ending {
  color: #C64545;
}

.status-stamp--upcoming {
  color: var(--color-green-dark);
}

.event-card__title {
  margin: 0 0 0.5rem;
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1.5;
}

.event-card__meta {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  margin-bottom: 0.7rem;
  font-size: 0.85rem;
  color: var(--color-ink-soft);
}

.event-card__meta-row {
  display: flex;
  align-items: baseline;
  gap: 0.4em;
}

.event-card__meta-icon {
  flex: 0 0 auto;
}

.event-card__summary {
  margin: 0 0 var(--space-2);
  font-size: 0.9rem;
  color: var(--color-ink);
}

.event-card__link {
  display: inline-flex;
  align-items: center;
  gap: 0.3em;
  font-size: 0.86rem;
  font-weight: 700;
  color: var(--color-green-dark);
  text-decoration: none;
  border-bottom: 2px solid var(--color-green);
  padding-bottom: 0.1em;
  transition: color 0.15s ease, border-color 0.15s ease, gap 0.15s ease;
}

.event-card__link:hover,
.event-card__link:focus-visible {
  color: var(--color-pink);
  border-color: var(--color-pink);
  gap: 0.5em;
}

.event-card__link:focus-visible {
  outline: 3px solid var(--color-green);
  outline-offset: 3px;
}

.event-empty {
  text-align: center;
  padding: var(--space-4) var(--space-2);
  color: var(--color-ink-soft);
  font-weight: 500;
}

/* ---------------------------------------------------------------------- */
/* Permanent spots                                                          */
/* ---------------------------------------------------------------------- */

.spot-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.75rem;
  padding-bottom: var(--space-2);
}

@media (min-width: 720px) {
  .spot-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.spot-card {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  padding: 0.9rem 1.1rem;
  background: var(--color-paper-dim);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: transform 0.15s ease, background-color 0.15s ease;
}

.spot-card:hover {
  transform: translateY(-2px);
  background: var(--color-green-pale);
}

.spot-card__icon {
  flex: 0 0 auto;
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  background: var(--color-green);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.95rem;
}

.spot-card__body {
  min-width: 0;
}

.spot-card__name {
  margin: 0;
  font-size: 0.9rem;
  font-weight: 700;
}

.spot-card__place {
  margin: 0.1rem 0 0;
  font-size: 0.78rem;
  color: var(--color-ink-soft);
}

/* ---------------------------------------------------------------------- */
/* About section                                                           */
/* ---------------------------------------------------------------------- */

.about-section {
  padding-top: 0;
  padding-bottom: var(--space-2);
}

.about-card {
  background: var(--color-pink-pale);
  border: 2px dashed #E7B7C3;
  border-radius: var(--radius-lg);
  padding: var(--space-3);
}

.about-card__title {
  margin: 0 0 0.5rem;
  font-size: 1.05rem;
  font-weight: 700;
}

.about-card p {
  margin: 0;
  font-size: 0.85rem;
  color: var(--color-ink-soft);
}

.about-card a {
  font-weight: 700;
}

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

.site-footer {
  margin-top: var(--space-4);
  padding: var(--space-3) var(--space-2) var(--space-4);
  text-align: center;
  border-top: 2px dashed var(--color-border);
  font-size: 0.78rem;
  color: var(--color-ink-soft);
}

.site-footer p {
  margin: 0.2rem 0;
}

.site-footer__updated {
  font-weight: 700;
  color: var(--color-green-dark);
}

/* ---------------------------------------------------------------------- */
/* Bottom nav (app-style tab bar)                                          */
/* ---------------------------------------------------------------------- */

.bottom-nav {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 20;
  display: flex;
  background: var(--color-paper);
  border-top: 2px solid var(--color-border);
  box-shadow: 0 -6px 20px -14px rgba(46, 59, 50, 0.4);
  padding: 0.4rem 0.5rem calc(0.4rem + env(safe-area-inset-bottom));
}

@media (min-width: 720px) {
  .bottom-nav {
    max-width: 640px;
    margin: 0 auto;
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    border-left: 2px solid var(--color-border);
    border-right: 2px solid var(--color-border);
  }
}

.bottom-nav__item {
  position: relative;
  flex: 1 1 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.15rem;
  padding: 0.4rem 0.2rem;
  border: none;
  background: transparent;
  color: var(--color-ink-soft);
  font-size: 0.68rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: color 0.15s ease, background-color 0.15s ease;
}

.bottom-nav__icon {
  font-size: 1.25rem;
  line-height: 1;
}

.bottom-nav__item.is-active {
  color: var(--color-green-dark);
  font-weight: 700;
}

.bottom-nav__item.is-active::before {
  content: "";
  position: absolute;
  top: -2px;
  left: 50%;
  transform: translateX(-50%);
  width: 28px;
  height: 4px;
  border-radius: 999px;
  background: var(--color-green);
}

.bottom-nav__item:hover {
  color: var(--color-green-dark);
}

.bottom-nav__item:focus-visible {
  outline: 3px solid var(--color-green);
  outline-offset: 2px;
}

/* ---------------------------------------------------------------------- */
/* Reduced motion                                                           */
/* ---------------------------------------------------------------------- */

@media (prefers-reduced-motion: reduce) {
  * {
    transition: none !important;
  }
}