/* =========================================================
   neconote（ねこのて） common stylesheet
   ========================================================= */

:root {
  /* --- Color --- */
  --color-bg: #fcfbf8;
  --color-surface: #ffffff;
  --color-text: #3f3a37;
  --color-text-sub: #716965;
  --color-border: #e8e2db;

  --color-primary: #8a6f63;
  --color-primary-dark: #6f574c;
  --color-paw: #e9c7c0;
  --color-mint: #cfe6dc;
  --color-cream: #f4e9d8;
  --color-pink-soft: #f7e8e5;

  --color-focus: #6f574c;

  /* --- Typography --- */
  --font-body:
    "Noto Sans JP", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-heading:
    "Zen Maru Gothic", "Noto Sans JP", -apple-system, BlinkMacSystemFont,
    "Segoe UI", sans-serif;

  --fs-sm: clamp(0.8rem, 0.76rem + 0.2vw, 0.875rem);
  --fs-base: clamp(0.95rem, 0.92rem + 0.2vw, 1rem);
  --fs-md: clamp(1.05rem, 1rem + 0.3vw, 1.2rem);
  --fs-lg: clamp(1.3rem, 1.2rem + 0.6vw, 1.6rem);
  --fs-xl: clamp(1.7rem, 1.5rem + 1.2vw, 2.4rem);

  /* --- Spacing / Layout --- */
  --space-xs: clamp(0.4rem, 0.36rem + 0.2vw, 0.5rem);
  --space-sm: clamp(0.7rem, 0.6rem + 0.4vw, 0.9rem);
  --space-md: clamp(1.2rem, 1rem + 0.8vw, 1.6rem);
  --space-lg: clamp(2rem, 1.6rem + 1.6vw, 3rem);
  --space-xl: clamp(3rem, 2.4rem + 2.4vw, 4.5rem);

  --container-width: 1120px;
  --radius-card: 18px;
  --radius-pill: 999px;

  --shadow-card: 0 4px 16px rgba(63, 58, 55, 0.06);
  --shadow-card-hover: 0 10px 24px rgba(63, 58, 55, 0.1);

  --transition-fast: 0.15s ease;
  --transition-base: 0.2s ease;

  /* JSがヘッダーの実測高さで上書きする。JS無効時のフォールバック値。 */
  --header-height: 64px;
}

/* =========================================================
   Reset / base
   ========================================================= */

*,
*::before,
*::after {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: var(--fs-base);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
}

ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

button {
  font: inherit;
  color: inherit;
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-heading);
  margin: 0;
  line-height: 1.4;
}

p {
  margin: 0;
}

.container {
  width: 100%;
  max-width: var(--container-width);
  margin-inline: auto;
  padding-inline: var(--space-md);
}

.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;
}

.skip-link {
  position: absolute;
  top: -3rem;
  left: var(--space-sm);
  background: var(--color-primary-dark);
  color: #fff;
  padding: 0.6rem 1rem;
  border-radius: var(--radius-pill);
  z-index: 100;
  transition: top var(--transition-base);
}

.skip-link:focus {
  top: var(--space-sm);
}

:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 2px;
  border-radius: 4px;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

/* =========================================================
   Header
   ========================================================= */

.site-header {
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding-block: var(--space-sm);
  position: sticky;
  top: 0;
  z-index: 50;
}

/* ヘッダーがsticky表示のため、アンカーリンクでのジャンプ先が
   ヘッダーの下に隠れないよう、実測したヘッダー高さぶん余白を確保する。 */
section[id] {
  scroll-margin-top: var(--header-height);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
}

.site-logo {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-heading);
  font-size: var(--fs-lg);
  font-weight: 700;
  color: var(--color-primary-dark);
  text-decoration: none;
}

.site-logo .paw-icon {
  color: var(--color-paw);
  flex-shrink: 0;
}

.site-nav a {
  text-decoration: none;
  font-weight: 700;
  color: var(--color-text);
  padding: 0.5rem 0.9rem;
  border-radius: var(--radius-pill);
  transition: background-color var(--transition-fast);
}

.site-nav a:hover {
  background-color: var(--color-cream);
}

/* =========================================================
   Section heading (with paw accent)
   ========================================================= */

.section {
  padding-block: var(--space-lg);
}

.section__header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
  flex-wrap: wrap;
}

.section__title {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: var(--fs-lg);
  color: var(--color-text);
}

.section__title .paw-icon {
  color: var(--color-paw);
  width: 1.1em;
  height: 1.1em;
  flex-shrink: 0;
}

.section__lead {
  color: var(--color-text-sub);
  font-size: var(--fs-sm);
}

/* =========================================================
   Hero (First view)
   ========================================================= */

.hero {
  padding-block: var(--space-xl) var(--space-lg);
  position: relative;
  overflow: hidden;
}

.hero__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
  align-items: center;
}

.hero__catch {
  font-size: var(--fs-xl);
  font-weight: 600;
  color: var(--color-primary-dark);
  margin-bottom: var(--space-sm);
}

.hero__lead {
  color: var(--color-text-sub);
  font-size: var(--fs-md);
  margin-bottom: var(--space-md);
  max-width: 42em;
}

.hero__cta {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background-color: var(--color-primary);
  color: #fff;
  text-decoration: none;
  font-weight: 700;
  padding: 0.9rem 1.6rem;
  border-radius: var(--radius-pill);
  box-shadow: var(--shadow-card);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.hero__cta:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-card-hover);
}

.hero__illustration {
  justify-self: center;
  color: var(--color-paw);
  width: min(220px, 60vw);
}

@media (min-width: 768px) {
  .hero__inner {
    grid-template-columns: 3fr 2fr;
  }
}

/* =========================================================
   Ad slot
   ========================================================= */

.ad-slot {
  margin-block: var(--space-lg);
  padding: var(--space-md);
  text-align: center;
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-card);
  color: var(--color-text-sub);
  font-size: var(--fs-sm);
  background-color: var(--color-surface);
}

/* =========================================================
   Cards grid
   ========================================================= */

.card-grid {
  display: grid;
  grid-template-columns: repeat(1, minmax(0, 1fr));
  gap: var(--space-md);
}

.card-grid__ad-slot {
  grid-column: 1 / -1;
}

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

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

.tool-card {
  position: relative;
  display: flex;
  flex-direction: column;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  padding: var(--space-md);
  height: 100%;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.tool-card[hidden] {
  display: none;
}

.tool-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
}

.tool-card__top {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-sm);
}

.tool-card__icon {
  width: 2.5rem;
  height: 2.5rem;
  flex-shrink: 0;
  border-radius: 12px;
  background-color: var(--color-cream);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  overflow: hidden;
}

.tool-card__icon img,
.tool-card__icon svg {
  width: 60%;
  height: 60%;
}

.tool-card__badges {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
  margin-left: auto;
}

.badge {
  display: inline-flex;
  align-items: center;
  font-size: var(--fs-sm);
  font-weight: 700;
  padding: 0.15rem 0.65rem;
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
}

.badge--new {
  background-color: var(--color-mint);
  color: #2d5a45;
}

.badge--popular {
  background-color: var(--color-pink-soft);
  color: #8a4a45;
}

.badge--rank {
  background-color: var(--color-primary-dark);
  color: #fff;
}

.tool-card__title {
  font-size: var(--fs-md);
  color: var(--color-text);
  margin-bottom: 0.4rem;
}

.tool-card__title a {
  text-decoration: none;
}

.tool-card__title a::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: var(--radius-card);
}

.tool-card__desc {
  color: var(--color-text-sub);
  font-size: var(--fs-sm);
  flex-grow: 1;
  margin-bottom: var(--space-sm);
}

.tool-card__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
  margin-top: auto;
}

.tool-card__category {
  font-size: var(--fs-sm);
  color: var(--color-text-sub);
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  padding: 0.2rem 0.7rem;
}

.tool-card__link-label {
  font-size: var(--fs-sm);
  font-weight: 700;
  color: var(--color-primary-dark);
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
}

/* =========================================================
   Ranking cards (popular section)
   ========================================================= */

.ranking-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
}

@media (min-width: 768px) {
  .ranking-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* =========================================================
   Category filter
   ========================================================= */

.category-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-bottom: var(--space-md);
}

.category-filter__button {
  border: 1px solid var(--color-border);
  background-color: var(--color-surface);
  color: var(--color-text);
  padding: 0.5rem 1.1rem;
  border-radius: var(--radius-pill);
  cursor: pointer;
  font-size: var(--fs-sm);
  font-weight: 700;
  transition: background-color var(--transition-fast), color var(--transition-fast),
    border-color var(--transition-fast);
}

.category-filter__button:hover {
  border-color: var(--color-primary);
}

.category-filter__button[aria-pressed="true"] {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

.category-filter__button[aria-pressed="true"]::before {
  content: "\2713 ";
}

.filter-status {
  font-size: var(--fs-sm);
  color: var(--color-text-sub);
  margin-bottom: var(--space-md);
}

/* noscript fallback: hide JS-only controls, show all cards */
.no-js .category-filter {
  display: none;
}

/* =========================================================
   Empty state
   ========================================================= */

.empty-state {
  text-align: center;
  padding: var(--space-xl) var(--space-md);
  color: var(--color-text-sub);
}

.empty-state__illustration {
  width: 96px;
  margin-inline: auto;
  margin-bottom: var(--space-sm);
  color: var(--color-paw);
}

/* =========================================================
   Footer
   ========================================================= */

.site-footer {
  border-top: 1px solid var(--color-border);
  background-color: var(--color-surface);
  padding-block: var(--space-lg);
  margin-top: var(--space-xl);
  color: var(--color-text-sub);
  font-size: var(--fs-sm);
}

.site-footer__inner {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  align-items: center;
  text-align: center;
}

.site-footer__paw {
  color: var(--color-paw);
}

.site-footer__nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.3rem var(--space-md);
}

.site-footer__nav a {
  color: var(--color-text-sub);
  text-decoration: none;
}

.site-footer__nav a:hover,
.site-footer__nav a:focus-visible {
  color: var(--color-primary-dark);
  text-decoration: underline;
}

/* =========================================================
   Utility
   ========================================================= */

.section--muted {
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}