/* =============================================================
   井之頭の診療所 — デザイントークン
   内装写真から抽出したカラーパレット
   ============================================================= */

:root {
  /* ——— Brand Colors (from interior photo) ——— */
  --navy-900: #0F1D33;        /* navy door, deeper */
  --navy-800: #1E2F4D;        /* navy door, primary */
  --navy-700: #2B4066;        /* navy, hover */
  --navy-100: #E6EAF0;        /* navy tint */

  --oak-900: #6B4A2B;         /* dark wood */
  --oak-700: #A97B4C;         /* oak floor */
  --oak-500: #C99A6B;         /* light oak */
  --oak-300: #E8D3B8;         /* oak tint */
  --oak-100: #F5EBDC;         /* warm cream */

  --ink-900: #171A1F;         /* matte black (iron frame) */
  --ink-700: #3A3F46;
  --ink-500: #6B7280;
  --ink-400: #9AA1AB;
  --ink-300: #C7CBD1;
  --ink-200: #E2E5E9;
  --ink-100: #F1F3F5;

  --tile-white: #FAFAF7;      /* subway tile */
  --paper: #FFFFFF;
  --bg: #FBFAF6;              /* warm off-white page bg */
  --bg-alt: #F5F2EC;          /* warm neutral section bg */

  --accent: var(--navy-800);
  --accent-soft: var(--navy-100);

  /* ——— Type ——— */
  --f-sans: "Noto Sans JP", -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
  --f-serif: "Noto Serif JP", "Hiragino Mincho ProN", serif;
  --f-mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;

  /* ——— Spacing / radii ——— */
  --r-sm: 2px;
  --r-md: 4px;
  --r-lg: 8px;
  --r-pill: 999px;

  --shadow-xs: 0 1px 2px rgba(15, 29, 51, 0.04);
  --shadow-sm: 0 2px 8px rgba(15, 29, 51, 0.06);
  --shadow-md: 0 8px 24px rgba(15, 29, 51, 0.08);

  --container: 1160px;
  --container-narrow: 760px;

  --ease: cubic-bezier(.2, .7, .2, 1);
}

/* ——— Reset ——— */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--f-sans);
  color: var(--ink-900);
  background: var(--bg);
  font-feature-settings: "palt";
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  line-height: 1.75;
  font-size: 16px;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }

/* ——— Utility ——— */
.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }
.container-narrow { max-width: var(--container-narrow); margin: 0 auto; padding: 0 24px; }

.eyebrow {
  font-size: 11px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--navy-800);
  font-weight: 500;
  font-family: var(--f-mono);
}

.rule {
  height: 1px; background: var(--ink-200); border: none; margin: 0;
}

/* ——— Terms (underlined, hover tooltip) ——— */
.term {
  position: relative;
  cursor: help;
  border-bottom: 1px dashed var(--navy-800);
  color: var(--navy-800);
  font-weight: 500;
}
.term:hover .term-pop,
.term:focus .term-pop,
.term.term-open .term-pop { opacity: 1; pointer-events: auto; transform: translate(-50%, -8px); }
.term-pop {
  position: absolute;
  left: 50%;
  bottom: calc(100% + 4px);
  transform: translate(-50%, 0);
  width: 280px;
  background: #ffffff;
  color: var(--ink-900);
  padding: 12px 14px;
  border-radius: var(--r-md);
  font-size: 12px;
  line-height: 1.7;
  opacity: 0;
  pointer-events: none;
  transition: opacity .2s var(--ease), transform .2s var(--ease);
  z-index: 50;
  font-weight: 400;
  letter-spacing: 0.02em;
  box-shadow: 0 4px 16px rgba(15,29,51,.12);
  border: 1px solid var(--ink-200);
}
.term-pop::after {
  content: "";
  position: absolute;
  top: 100%; left: 50%;
  margin-left: -5px;
  border: 5px solid transparent;
  border-top-color: var(--ink-200);
}
.term-pop::before {
  content: "";
  position: absolute;
  top: calc(100% - 1px); left: 50%;
  margin-left: -4px;
  border: 4px solid transparent;
  border-top-color: #ffffff;
}

/* ——— Fade-in on scroll ——— */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity .8s var(--ease), transform .8s var(--ease);
}
.reveal.visible { opacity: 1; transform: translateY(0); }

/* ——— Placeholder image ——— */
.ph {
  background:
    repeating-linear-gradient(
      45deg,
      rgba(30, 47, 77, 0.04) 0px,
      rgba(30, 47, 77, 0.04) 1px,
      transparent 1px,
      transparent 10px
    ),
    var(--bg-alt);
  border: 1px solid var(--ink-200);
  color: var(--ink-500);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 24px;
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  gap: 6px;
}
.ph::before {
  content: "▢";
  font-size: 18px;
  color: var(--ink-400);
}
.ph small { font-size: 10px; color: var(--ink-400); }

@media (max-width: 1024px) {
  .term-pop {
    position: fixed;
    left: 16px;
    right: 16px;
    width: auto;
    bottom: 24px;
    top: auto;
    transform: translateY(12px);
    z-index: 100;
  }
  .term-pop::after,
  .term-pop::before { display: none; }
  .term:hover .term-pop,
  .term:focus .term-pop,
  .term.term-open .term-pop {
    transform: translateY(0);
  }
}