/* =========================================================
   Qualiaxis - responsive stylesheet (cleaned)
   ========================================================= */

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

html, body { height: 100%; }

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans JP", "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
  line-height: 1.6;
}

img { max-width: 100%; height: auto; vertical-align: middle; }

a { color: inherit; text-decoration: none; }
a:hover { text-decoration: none; }

:root {
  /* Colors */
  --color-bg: #F9F9F9;
  --color-text: #111111;
  --color-accent: #6A737D;
  --color-border: #E8E8E8;
  --color-hover: #D0D0D0;

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;

  /* Type */
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.85rem;
  --font-size-base: 0.95rem;
  --font-size-lg: 1.2rem;
  --font-size-xl: 1.8rem;
  --font-size-2xl: 2.2rem;

  --letter-spacing-tight: 0.05em;
  --letter-spacing-normal: 0.08em;
  --letter-spacing-wide: 0.15em;

  /* Header / Logo */
  --logo-max-height: 200px;     /* ロゴ画像の最大高さ（要望: 200px） */
  --logo-height: 200px;         /* ロゴ領域の最低高さ（通常時） */
  --logo-height-compact: 40px;  /* スクロール後（is-compact時） */

  --header-pad-y: 1rem;
  --header-pad-x: var(--spacing-lg);
  --header-gap: var(--spacing-md);

  --nav-gap: var(--spacing-lg);

  /* Grid */
  --grid-columns: 4;
  --grid-gap: 3.5rem;
  --grid-item-height: 280px;
}

/* ---- Responsive variables ---- */
@media (max-width: 479px) {
  :root {
    --header-pad-x: var(--spacing-sm);
    --header-gap: var(--spacing-sm);
    --nav-gap: var(--spacing-md);

    --logo-max-height: 140px;
    --logo-height: 140px;

    --grid-columns: 1;
    --grid-gap: 1.75rem;
    --grid-item-height: 240px;
  }
}

@media (min-width: 480px) and (max-width: 767px) {
  :root {
    --logo-max-height: 160px;
    --logo-height: 160px;

    --grid-columns: 2;
    --grid-gap: 2.5rem;
    --grid-item-height: 240px;
  }
}

@media (min-width: 768px) {
  :root {
    /* 横paddingだけ“少しだけ”可変 */
    --header-pad-x: clamp(1rem, 3vw, 3rem);
  }
}

@media (min-width: 768px) and (max-width: 1023px) {
  :root {
    --grid-columns: 3;
    --grid-gap: 3rem;
    --grid-item-height: 260px;
  }
}

@media (min-width: 1920px) {
  :root {
    --grid-columns: 5;
    --grid-gap: 4rem;
  }
}

/* =========================================================
   Header
   ========================================================= */
.header {
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  padding: var(--header-pad-y) var(--header-pad-x);
  position: sticky;
  top: 0;
  z-index: 100;
  transition: padding 200ms ease, box-shadow 200ms ease;
}

.header-container {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  gap: var(--header-gap);
  transition: gap 200ms ease;
}

/* ロゴ画像と文字タイトルを“同じ場所に重ねる” */
.logo-section {
  display: grid;
  place-items: center;
  min-height: var(--logo-height);
}
.logo-section > * { grid-area: 1 / 1; }

.logo-image {
  display: block;
  max-height: var(--logo-max-height);
  width: auto;
  max-width: min(82vw, 980px);
  opacity: 1;
  transform: translateY(0);
  transition: opacity 220ms ease, transform 220ms ease;
}

.site-title {
  margin: 0;
  font-size: var(--font-size-2xl);
  letter-spacing: var(--letter-spacing-wide);
  text-transform: uppercase;
  font-weight: 500;
  color: var(--color-text);
  opacity: 0;
  transform: translateY(6px);
  transition: opacity 220ms ease, transform 220ms ease;
  pointer-events: none;
}

/* ---- Compact mode (JSで .header に is-compact を付与) ---- */
.header.is-compact {
  --logo-height: var(--logo-height-compact);
  --header-pad-y: 0.5rem;
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.06);
}

.header.is-compact .logo-image {
  opacity: 0;
  transform: translateY(-6px);
  pointer-events: none;
}

.header.is-compact .site-title {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

/* =========================================================
   Navigation
   ========================================================= */
.navigation {
  display: flex;
  gap: var(--nav-gap);
  align-items: center;
  flex-wrap: wrap;
  justify-content: center;
  transition: gap 200ms ease;
}

.nav-link {
  font-size: var(--font-size-sm);
  letter-spacing: var(--letter-spacing-normal);
  color: var(--color-accent);
  text-transform: uppercase;
  font-weight: 400;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: 2px;
  transition: color 160ms ease, background-color 160ms ease, transform 160ms ease;
}

.nav-link:hover {
  color: var(--color-text);
  background-color: rgba(0, 0, 0, 0.04);
}

.nav-link:active { transform: scale(0.98); }

/* =========================================================
   Main / Grid
   ========================================================= */
.main-content {
  max-width: 1400px;
  margin: 0 auto;
  padding: var(--spacing-xl) var(--spacing-lg);
  min-height: calc(100vh - 200px);
}

.gallery { width: 100%; }

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(var(--grid-columns), 1fr);
  gap: var(--grid-gap);
  grid-auto-rows: var(--grid-item-height);
}

/* =========================================================
   Artwork cards
   ========================================================= */
.artwork-item {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  cursor: pointer;
  transition: transform 200ms ease;
}

.artwork-item:hover { transform: translateY(-4px); }

.artwork-image {
  width: 100%;
  height: 100%;
  background-color: var(--color-border);
  border: 1px solid var(--color-hover);
  border-radius: 2px;
  overflow: hidden;
  position: relative;

  /* background-imageでも動くように残す */
  background-size: cover;
  background-position: center;

  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
  transition: box-shadow 200ms ease;
}

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

.artwork-item:hover .artwork-image {
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.10);
}

.artwork-info {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-xs) 0;
}

.artwork-title {
  font-size: var(--font-size-sm);
  letter-spacing: var(--letter-spacing-tight);
  font-weight: 400;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}

.vote-count {
  font-size: var(--font-size-sm);
  color: var(--color-accent);
  letter-spacing: var(--letter-spacing-tight);
  font-weight: 300;
  white-space: nowrap;
}

/* =========================================================
   Vote button
   ========================================================= */
.vote-button {
  background-color: transparent;
  border: 1px solid var(--color-accent);
  color: var(--color-accent);
  padding: var(--spacing-xs) var(--spacing-sm);
  font-size: var(--font-size-sm);
  letter-spacing: var(--letter-spacing-tight);
  cursor: pointer;
  transition: background-color 160ms ease, color 160ms ease, border-color 160ms ease, transform 160ms ease;
  font-weight: 400;
  border-radius: 2px;
  white-space: nowrap;
  min-height: 2.5rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

@media (max-width: 479px) {
  .vote-button {
    min-height: 2.2rem;
    padding: var(--spacing-xs) var(--spacing-xs);
    font-size: var(--font-size-xs);
  }
}

.vote-button:hover {
  background-color: var(--color-text);
  color: var(--color-bg);
  border-color: var(--color-text);
}

.vote-button:active { transform: scale(0.98); }

.vote-button:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* =========================================================
   Footer
   ========================================================= */
.footer {
  background-color: var(--color-bg);
  border-top: 1px solid var(--color-border);
  padding: var(--spacing-lg);
  text-align: center;
  color: var(--color-accent);
  font-size: var(--font-size-sm);
  letter-spacing: var(--letter-spacing-tight);
}

/* =========================================================
   Utilities
   ========================================================= */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
  .artwork-image { border-width: 1px; }
}

@media (orientation: landscape) and (max-height: 500px) {
  :root { --header-pad-y: 0.75rem; }
  .gallery-grid { grid-auto-rows: 200px; }
}

@media print {
  .header, .footer, .navigation { display: none; }
  .main-content { padding: 0; }
  .artwork-item { page-break-inside: avoid; }
}

/* Dark mode (OS設定に追従) */
@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #111111;
    --color-text: #F5F5F5;
    --color-accent: #AAAAAA;
    --color-border: #333333;
    --color-hover: #444444;
  }
  .nav-link:hover { background-color: rgba(255, 255, 255, 0.08); }
}