/* ============================================================
 * +ART Design System — component styles
 * Every selector is `.ds-` prefixed, so this file cannot affect
 * any existing prototype page (those use different class names).
 * Safe to load globally.
 * ============================================================ */

/* ---------- Button ---------- */
.ds-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  font-family: var(--f-en);
  font-weight: var(--fw-bold);
  font-size: var(--fs-base);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  line-height: 1;
  text-decoration: none;
  cursor: pointer;
  border-radius: var(--r-pill);
  border: 1.5px solid transparent;
  padding: 18px 34px;
  transition: background var(--t-base) var(--ease),
              color var(--t-base) var(--ease),
              border-color var(--t-base) var(--ease),
              transform var(--t-fast) var(--ease);
}
.ds-btn:hover { transform: translateY(-2px); }
.ds-btn:focus-visible { outline: 2px solid var(--c-accent); outline-offset: 3px; }

.ds-btn--primary { background: var(--c-accent); color: #fff; border-color: var(--c-accent); }
.ds-btn--primary:hover { background: var(--c-accent-deep); border-color: var(--c-accent-deep); }

.ds-btn--ink { background: var(--c-ink); color: #fff; border-color: var(--c-ink); }
.ds-btn--ink:hover { background: #000; border-color: #000; }

.ds-btn--outline { background: transparent; color: var(--c-ink); border-color: var(--c-ink); }
.ds-btn--outline:hover { background: var(--c-ink); color: #fff; }

.ds-btn--ghost { background: transparent; color: var(--c-accent); border-color: transparent; }
.ds-btn--ghost:hover { color: var(--c-accent-deep); }

.ds-btn--sm { padding: 12px 22px; font-size: var(--fs-xs); }
.ds-btn--lg { padding: 22px 44px; font-size: var(--fs-md); }

.ds-btn[aria-disabled="true"],
.ds-btn:disabled { opacity: .4; pointer-events: none; }

.ds-btn .ds-btn__arrow {
  display: inline-flex; align-items: center; justify-content: center;
  width: 26px; height: 26px; border-radius: 50%;
  background: rgba(255,255,255,.18); font-size: 12px;
  transition: transform var(--t-fast) var(--ease);
}
.ds-btn:hover .ds-btn__arrow { transform: translateX(3px); }

/* ---------- /design-system catalog page ---------- */
.ds-page {
  font-family: var(--f-jp);
  color: var(--c-ink);
  background: var(--c-paper);
  min-height: 100vh;
  padding: 64px 0 140px;
}
.ds-wrap { max-width: var(--container); margin: 0 auto; padding: 0 30px; }
.ds-hero { margin-bottom: 80px; }
.ds-hero h1 {
  font-family: var(--f-en); font-weight: var(--fw-extra);
  font-size: var(--fs-5xl); letter-spacing: -0.02em; margin: 0 0 8px;
}
.ds-hero p { color: var(--c-ink-mute); font-size: var(--fs-base); margin: 0; }
.ds-sec { margin-top: 80px; }
.ds-sec > h2 {
  font-family: var(--f-en); font-weight: var(--fw-bold);
  font-size: var(--fs-2xl); letter-spacing: 0.02em;
  margin: 0 0 28px; padding-bottom: 14px;
  border-bottom: 1px solid var(--c-rule); position: relative;
}
.ds-sec > h2::after {
  content: ""; position: absolute; left: 0; bottom: -1px;
  width: 56px; height: 2px; background: var(--c-accent);
}

.ds-swatches { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.ds-swatch { background: var(--c-card); border-radius: var(--r-sm); overflow: hidden; box-shadow: 0 6px 24px rgba(0,0,0,.04); }
.ds-swatch__chip { height: 96px; }
.ds-swatch__meta { padding: 14px 16px; }
.ds-swatch__name { font-weight: var(--fw-bold); font-size: var(--fs-sm); }
.ds-swatch__val { font-family: var(--f-en); font-size: var(--fs-xs); color: var(--c-ink-mute); margin-top: 4px; }
.ds-swatch__var { font-family: var(--f-en); font-size: var(--fs-xs); color: var(--c-ink-mute); }

.ds-table { width: 100%; border-collapse: collapse; background: var(--c-card); border-radius: var(--r-sm); overflow: hidden; }
.ds-table th, .ds-table td { text-align: left; padding: 14px 18px; border-bottom: 1px solid var(--c-rule); font-size: var(--fs-sm); }
.ds-table th { font-family: var(--f-en); color: var(--c-ink-mute); font-weight: var(--fw-semibold); letter-spacing: .04em; }
.ds-table tr:last-child td { border-bottom: none; }
.ds-type-sample { font-family: var(--f-en); }

.ds-spaces { display: flex; flex-direction: column; gap: 10px; }
.ds-space-row { display: grid; grid-template-columns: 110px 1fr; align-items: center; gap: 16px; font-size: var(--fs-sm); }
.ds-space-bar { height: 14px; background: var(--c-accent); border-radius: 3px; }

.ds-btn-grid { display: flex; flex-wrap: wrap; gap: 18px; align-items: center; }

.ds-index { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.ds-index a {
  display: flex; justify-content: space-between; align-items: center;
  background: var(--c-card); border: 1px solid var(--c-rule);
  border-radius: var(--r-sm); padding: 16px 18px;
  text-decoration: none; color: var(--c-ink);
  font-size: var(--fs-sm); transition: border-color var(--t-fast) var(--ease);
}
.ds-index a:hover { border-color: var(--c-ink); }
.ds-index a span:last-child { color: var(--c-accent); font-family: var(--f-en); }

@media screen and (max-width: 767px) {
  .ds-hero h1 { font-size: var(--fs-3xl); }
  .ds-swatches { grid-template-columns: repeat(2, 1fr); }
  .ds-index { grid-template-columns: 1fr; }
}
@media screen and (max-width: 600px) {
  .ds-swatches { grid-template-columns: 1fr; }
}