/* ════════════════════════════════════════════════════════════
   Felice — Order Cake 3D Simulator  /  styles
   LPと共通のトークン（タン〜シャンパン〜アイボリー・セリフ書体）
   ════════════════════════════════════════════════════════════ */

:root {
  --tan:        #d2b48c;
  --tan-mid:    #c4a478;
  --tan-dark:   #a8845a;
  --tan-pale:   #f4ead9;
  --tan-ultra:  #fbf7f1;
  --champagne:  #c9a96a;
  --champagne-light: #e6d4a8;
  --white:      #ffffff;
  --ivory:      #fdfbf7;
  --text:       #2e1f14;
  --text-mid:   #6b4f38;
  --text-soft:  #a68b6e;
  --border:     #ead9bf;
  --border-soft:#efe3cf;
  --shadow-sm:  0 4px 16px rgba(46,31,20,.06);
  --shadow-md:  0 14px 40px rgba(46,31,20,.09);
  --shadow-lg:  0 28px 72px rgba(46,31,20,.14);
  --ease:       cubic-bezier(.22,.61,.36,1);
  --ease-lux:   cubic-bezier(.76,0,.24,1);
  --serif-en:   'Cormorant Garamond', serif;
  --serif-jp:   'Noto Serif JP', serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body { height: 100%; }

body {
  font-family: var(--serif-jp);
  color: var(--text);
  background:
    radial-gradient(ellipse 90% 60% at 50% -10%, var(--tan-ultra), transparent 60%),
    linear-gradient(180deg, var(--ivory) 0%, var(--tan-ultra) 100%);
  min-height: 100%;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

.serif-en { font-family: var(--serif-en); }

/* ── Header ─────────────────────────────────────────────── */
.sim-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px clamp(20px, 4vw, 48px);
  border-bottom: 1px solid var(--border-soft);
  background: rgba(253,251,247,.72);
  backdrop-filter: blur(10px);
  position: sticky; top: 0; z-index: 20;
}
.sim-logo { font-family: var(--serif-en); font-weight: 500; font-size: 1.5rem; letter-spacing: .14em; line-height: 1; color: var(--text); }
.sim-logo span { display: block; font-size: .56rem; letter-spacing: .42em; color: var(--text-soft); margin-top: 4px; text-transform: uppercase; }
.sim-back {
  font-family: var(--serif-en); font-size: .92rem; letter-spacing: .16em;
  color: var(--text-mid); text-decoration: none; padding: 8px 4px;
  transition: color .3s var(--ease);
}
.sim-back:hover { color: var(--tan-dark); }

/* ── Title block ────────────────────────────────────────── */
.sim-intro { text-align: center; padding: clamp(28px, 5vw, 52px) 24px clamp(8px, 2vw, 18px); }
.sim-intro .eyebrow {
  font-family: var(--serif-en); font-style: italic; font-size: .95rem;
  letter-spacing: .3em; color: var(--champagne); display: block; margin-bottom: 14px;
}
.sim-intro h1 {
  font-weight: 300; font-size: clamp(1.5rem, 4vw, 2.3rem); letter-spacing: .2em;
  line-height: 1.6; color: var(--text);
}
.sim-intro p {
  margin-top: 14px; font-size: .9rem; letter-spacing: .12em; color: var(--text-mid);
  font-weight: 300;
}

/* ── Layout ─────────────────────────────────────────────── */
.sim-main {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(320px, .9fr);
  gap: clamp(20px, 3vw, 40px);
  max-width: 1320px; margin: 0 auto;
  padding: clamp(16px, 3vw, 32px) clamp(16px, 4vw, 48px) 64px;
  align-items: start;
}
@media (max-width: 900px) {
  .sim-main { grid-template-columns: 1fr; }
}

/* ── Stage (canvas) ─────────────────────────────────────── */
.stage-wrap {
  position: relative;
  border-radius: 22px; overflow: hidden;
  background:
    radial-gradient(ellipse 70% 60% at 50% 30%, #fffdf9 0%, var(--tan-ultra) 55%, var(--tan-pale) 100%);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-soft);
  aspect-ratio: 4 / 3.4;
  position: sticky; top: 92px;
}
@media (max-width: 900px) {
  .stage-wrap { position: relative; top: 0; aspect-ratio: 1 / 1; }
}
#cakeCanvas { display: block; width: 100%; height: 100%; touch-action: none; cursor: grab; }
#cakeCanvas:active { cursor: grabbing; }

.stage-hint {
  position: absolute; left: 50%; bottom: 14px; transform: translateX(-50%);
  font-family: var(--serif-en); font-style: italic; font-size: .82rem; letter-spacing: .14em;
  color: var(--text-soft); background: rgba(253,251,247,.74); padding: 6px 16px;
  border-radius: 999px; pointer-events: none; white-space: nowrap;
  border: 1px solid var(--border-soft);
}
.stage-loading {
  position: absolute; inset: 0; display: flex; align-items: center; justify-content: center;
  font-family: var(--serif-en); font-style: italic; letter-spacing: .2em; color: var(--text-soft);
  background: var(--tan-ultra); transition: opacity .5s var(--ease);
}
.stage-loading.hidden { opacity: 0; pointer-events: none; }

/* ── Panel (controls) ───────────────────────────────────── */
.panel {
  background: var(--white);
  border: 1px solid var(--border-soft);
  border-radius: 22px;
  box-shadow: var(--shadow-sm);
  padding: clamp(20px, 2.4vw, 30px);
  display: flex; flex-direction: column; gap: 26px;
}
.field-label {
  display: flex; align-items: baseline; gap: 10px;
  font-size: .82rem; letter-spacing: .16em; color: var(--text-mid); font-weight: 500;
  margin-bottom: 12px;
}
.field-label .en {
  font-family: var(--serif-en); font-style: italic; font-size: .8rem; letter-spacing: .1em;
  color: var(--text-soft); margin-left: auto; text-transform: none;
}

/* segmented (tiers) */
.seg { display: grid; grid-auto-flow: column; gap: 8px; }
.seg button {
  font-family: var(--serif-en); font-size: 1.05rem; letter-spacing: .04em;
  padding: 11px 0; border: 1px solid var(--border); border-radius: 12px;
  background: var(--tan-ultra); color: var(--text-mid); cursor: pointer;
  transition: all .26s var(--ease);
}
.seg button:hover { border-color: var(--tan); color: var(--text); }
.seg button[aria-pressed="true"] {
  background: linear-gradient(160deg, var(--tan) 0%, var(--tan-dark) 100%);
  color: #fff; border-color: var(--tan-dark); box-shadow: var(--shadow-sm);
}

/* slider (size) */
.slider-row { display: flex; align-items: center; gap: 14px; }
input[type="range"] {
  -webkit-appearance: none; appearance: none; height: 4px; border-radius: 999px;
  background: linear-gradient(to right, var(--tan) 0%, var(--tan) var(--fill,50%), var(--border) var(--fill,50%), var(--border) 100%);
  flex: 1; outline: none; cursor: pointer;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none; width: 20px; height: 20px; border-radius: 50%;
  background: #fff; border: 1px solid var(--tan-dark); box-shadow: var(--shadow-sm); cursor: grab;
}
input[type="range"]::-moz-range-thumb {
  width: 20px; height: 20px; border: 1px solid var(--tan-dark); border-radius: 50%; background: #fff; cursor: grab;
}
.slider-val { font-family: var(--serif-en); font-size: 1rem; color: var(--text-mid); min-width: 2.4em; text-align: right; letter-spacing: .08em; }

/* swatches (colors) */
.swatches { display: flex; flex-wrap: wrap; gap: 10px; }
.swatch {
  width: 38px; height: 38px; border-radius: 50%; cursor: pointer; position: relative;
  border: 1px solid rgba(46,31,20,.12); transition: transform .22s var(--ease), box-shadow .22s var(--ease);
}
.swatch:hover { transform: translateY(-2px); }
.swatch[aria-pressed="true"] { box-shadow: 0 0 0 2px #fff, 0 0 0 4px var(--tan-dark); }
.swatch[aria-pressed="true"]::after {
  content: ''; position: absolute; inset: 0; margin: auto; width: 10px; height: 10px;
  border-radius: 50%; background: rgba(255,255,255,.9); mix-blend-mode: difference;
}

/* chips (decorations) */
.chips { display: flex; flex-wrap: wrap; gap: 10px; }
.chip {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: .86rem; letter-spacing: .08em; padding: 9px 15px;
  border: 1px solid var(--border); border-radius: 999px; background: var(--tan-ultra);
  color: var(--text-mid); cursor: pointer; transition: all .24s var(--ease); user-select: none;
}
.chip:hover { border-color: var(--tan); }
.chip .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--border); transition: background .24s var(--ease); }
.chip[aria-pressed="true"] {
  background: var(--tan-pale); border-color: var(--tan); color: var(--text);
}
.chip[aria-pressed="true"] .dot { background: var(--tan-dark); }

/* topper text */
.topper-fields { display: flex; flex-direction: column; gap: 12px; }
.topper-fields.disabled { opacity: .4; pointer-events: none; }
.text-input {
  width: 100%; font-family: var(--serif-jp); font-size: .95rem; color: var(--text);
  padding: 11px 14px; border: 1px solid var(--border); border-radius: 12px;
  background: var(--tan-ultra); outline: none; transition: border-color .24s var(--ease);
}
.text-input::placeholder { color: var(--text-soft); }
.text-input:focus { border-color: var(--tan); background: #fff; }

/* toggle switch */
.switch-row { display: flex; align-items: center; justify-content: space-between; }
.switch {
  position: relative; width: 46px; height: 26px; border-radius: 999px;
  background: var(--border); border: none; cursor: pointer; transition: background .26s var(--ease); flex: none;
}
.switch::after {
  content: ''; position: absolute; top: 3px; left: 3px; width: 20px; height: 20px;
  border-radius: 50%; background: #fff; box-shadow: var(--shadow-sm); transition: transform .26s var(--ease);
}
.switch[aria-pressed="true"] { background: linear-gradient(160deg, var(--tan) 0%, var(--tan-dark) 100%); }
.switch[aria-pressed="true"]::after { transform: translateX(20px); }

/* divider */
.divider { height: 1px; background: var(--border-soft); }

/* ── Actions ────────────────────────────────────────────── */
.actions { display: flex; flex-direction: column; gap: 12px; }
.btn {
  font-family: var(--serif-jp); font-size: .95rem; letter-spacing: .14em; font-weight: 500;
  padding: 15px 22px; border-radius: 14px; border: 1px solid transparent; cursor: pointer;
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  text-decoration: none; text-align: center; transition: all .28s var(--ease);
}
.btn-primary {
  background: linear-gradient(160deg, #d2b48c 0%, #b58a57 100%); color: #fff;
  box-shadow: 0 10px 30px rgba(120,80,40,.22);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 16px 40px rgba(120,80,40,.3); }
.btn-ghost { background: var(--white); border-color: var(--border); color: var(--text-mid); }
.btn-ghost:hover { border-color: var(--tan); color: var(--text); }

/* consult */
.consult { margin-top: 4px; padding-top: 18px; border-top: 1px solid var(--border-soft); }
.consult-title { font-size: .8rem; letter-spacing: .14em; color: var(--text-mid); margin-bottom: 12px; }
.consult-links { display: flex; flex-wrap: wrap; gap: 8px; }
.consult-links a {
  flex: 1 1 0; min-width: 88px; text-align: center; font-family: var(--serif-en);
  font-size: .9rem; letter-spacing: .1em; padding: 11px 8px; border-radius: 10px;
  border: 1px solid var(--border); color: var(--text-mid); text-decoration: none;
  transition: all .24s var(--ease);
}
.consult-links a:hover { border-color: var(--tan); color: var(--tan-dark); background: var(--tan-ultra); }

/* spec summary */
.spec { margin-top: 14px; }
.spec-box {
  font-size: .82rem; line-height: 1.9; letter-spacing: .04em; color: var(--text-mid);
  background: var(--tan-ultra); border: 1px solid var(--border-soft); border-radius: 12px;
  padding: 14px 16px; white-space: pre-wrap; max-height: 168px; overflow: auto;
}
.spec-copy {
  margin-top: 8px; font-size: .8rem; letter-spacing: .1em; color: var(--text-soft);
  background: none; border: none; cursor: pointer; padding: 4px; transition: color .24s var(--ease);
}
.spec-copy:hover { color: var(--tan-dark); }

/* toast */
.toast {
  position: fixed; left: 50%; bottom: 28px; transform: translate(-50%, 20px);
  background: var(--text); color: #fff; font-size: .85rem; letter-spacing: .1em;
  padding: 12px 22px; border-radius: 999px; opacity: 0; pointer-events: none;
  transition: all .4s var(--ease); z-index: 60;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

/* footer */
.sim-footer {
  text-align: center; padding: 36px 24px 48px; border-top: 1px solid var(--border-soft);
  color: var(--text-soft); font-size: .78rem; letter-spacing: .14em;
}
.sim-footer .serif-en { font-size: 1.1rem; letter-spacing: .14em; color: var(--text-mid); display: block; margin-bottom: 8px; }

/* noscript / fallback */
.nojs {
  max-width: 640px; margin: 40px auto; padding: 24px; text-align: center;
  border: 1px solid var(--border); border-radius: 14px; background: var(--white); color: var(--text-mid);
}

/* ── GLB parts: select & rows ─────────────────────────────── */
.part-row { display: flex; flex-direction: column; }
.variant-wrap { transition: opacity .24s var(--ease); }
.variant-wrap.disabled { opacity: .4; pointer-events: none; }
.select {
  width: 100%; font-family: var(--serif-jp); font-size: .9rem; color: var(--text);
  padding: 10px 38px 10px 13px; border: 1px solid var(--border); border-radius: 12px;
  background-color: var(--tan-ultra); outline: none; cursor: pointer; appearance: none; -webkit-appearance: none;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'><path d='M2 4l4 4 4-4' fill='none' stroke='%23a8845a' stroke-width='1.5'/></svg>");
  background-repeat: no-repeat; background-position: right 14px center;
  transition: border-color .24s var(--ease), background-color .24s var(--ease);
}
.select:focus { border-color: var(--tan); background-color: #fff; }