/* ==========================================================================
   CLOSER — cyanotype darkroom
   จานสี: ฟ้าน้ำเงินเข้มแบบภาพไซยาโนไทป์ + แสงนิรภัยสีเหลืองอำพันสำหรับกับดัก
   ========================================================================== */

:root {
  --abyss:  #061420;
  --deep:   #0B2438;
  --slate:  #12374F;
  --rule:   #1E5175;
  --wash:   #8FB3C9;
  --paper:  #EDF4F8;
  --safelight: #F2A63B;
  --fix:    #56D6B0;
  --miss:   #E2685F;

  --display: "Archivo", "IBM Plex Sans Thai", system-ui, sans-serif;
  --body:    "IBM Plex Sans Thai", "IBM Plex Sans", system-ui, sans-serif;
  --mono:    "IBM Plex Mono", ui-monospace, monospace;

  --gut: clamp(1rem, 4vw, 2rem);
  --col: 34rem;
  --ease: cubic-bezier(.22, .61, .36, 1);
}

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

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

body {
  margin: 0;
  background: var(--abyss);
  color: var(--paper);
  font-family: var(--body);
  font-size: 16px;
  line-height: 1.6;
  /* แสงสลัวจากมุมบน เหมือนไฟห้องมืด */
  background-image: radial-gradient(120% 70% at 50% -10%, #0E2C42 0%, var(--abyss) 62%);
  background-attachment: fixed;
  min-height: 100vh;
}

.mono { font-family: var(--mono); font-variant-numeric: tabular-nums; }
.sr, .skip:not(:focus) {
  position: absolute; width: 1px; height: 1px; overflow: hidden;
  clip: rect(0 0 0 0); clip-path: inset(50%); white-space: nowrap;
}
.skip:focus {
  position: fixed; top: .5rem; left: .5rem; z-index: 99;
  background: var(--safelight); color: var(--abyss);
  padding: .5rem .9rem; border-radius: 2px; font-weight: 600;
}
:focus-visible { outline: 2px solid var(--safelight); outline-offset: 3px; }

a { color: inherit; }

/* ---------------------------------------------------------------- masthead */
.masthead {
  display: flex; align-items: center; gap: 1rem;
  padding: 1rem var(--gut);
  border-bottom: 1px solid var(--rule);
  flex-wrap: wrap;
}
.brand {
  display: inline-flex; align-items: center; gap: .55rem;
  text-decoration: none; margin-right: auto;
}
.brand-mark {
  width: 15px; height: 15px; border-radius: 50%;
  border: 2px solid var(--safelight);
  box-shadow: inset 0 0 0 3px var(--abyss), 0 0 12px -2px var(--safelight);
}
.brand-word {
  font-family: var(--display);
  font-weight: 900; font-size: .95rem;
  letter-spacing: .22em; text-transform: uppercase;
}
.nav { display: flex; gap: 1.1rem; font-size: .82rem; }
.nav a { color: var(--wash); text-decoration: none; }
.nav a:hover { color: var(--paper); }

.langbar { display: flex; gap: .1rem; font-family: var(--mono); font-size: .7rem; }
.langbar a {
  color: var(--wash); text-decoration: none;
  padding: .25rem .45rem; border: 1px solid var(--rule);
}
.langbar a:first-child { border-right: 0; }
.langbar a.on { background: var(--rule); color: var(--paper); }

/* ------------------------------------------------------------------- stage */
main { display: block; }

.stage, .sheet, .empty, .prose {
  max-width: var(--col);
  margin: 0 auto;
  padding: 2.2rem var(--gut) 0;
}

.slate { text-align: center; margin-bottom: 1.6rem; }
.slate-no {
  margin: 0; font-family: var(--mono); font-size: .72rem;
  letter-spacing: .16em; text-transform: uppercase; color: var(--wash);
}
.slate-title {
  font-family: var(--display); font-weight: 900;
  font-size: clamp(2.4rem, 12vw, 3.6rem);
  letter-spacing: .1em; margin: .1em 0 .05em; line-height: 1;
  text-transform: uppercase;
}
.slate-date { margin: 0; color: var(--wash); font-size: .82rem; }

/* --------------------------------------------------- เลนส์ (signature) --- */
.rig { display: grid; justify-items: center; gap: 1.1rem; }

.loupe-wrap {
  position: relative;
  width: min(84vw, 21rem); aspect-ratio: 1;
  display: grid; place-items: center;
}

.loupe {
  position: absolute; inset: 5%;
  border-radius: 50%;
  background-repeat: no-repeat;
  background-size: 4000%;                 /* ตั้งค่าจริงด้วย JS */
  box-shadow:
    0 0 0 1px var(--rule),
    0 0 0 9px var(--abyss),
    0 0 0 10px var(--rule),
    0 22px 60px -18px #000;
  transition: background-size .75s var(--ease), filter .5s var(--ease);
  will-change: background-size;
}
.loupe-grain {
  position: absolute; inset: 0; border-radius: 50%;
  pointer-events: none;
  background: radial-gradient(circle at 32% 28%, rgba(255,255,255,.14), transparent 46%);
  mix-blend-mode: screen;
}

/* วงแหวนบอกระดับกำลังขยาย */
.dial { position: absolute; inset: 0; width: 100%; height: 100%; transform: rotate(-90deg); }
.dial-track, .dial-fill { fill: none; stroke-width: 1.5; }
.dial-track { stroke: var(--rule); }
.dial-fill {
  stroke: var(--safelight); stroke-linecap: round;
  stroke-dasharray: 301.6;
  stroke-dashoffset: 0;
  transition: stroke-dashoffset .6s var(--ease);
}

.mag {
  position: absolute; bottom: -.4rem; left: 50%; transform: translateX(-50%);
  background: var(--abyss); padding: 0 .7rem;
  display: flex; align-items: baseline; gap: .5rem; margin: 0;
}
#magNum { font-size: 1.5rem; font-weight: 600; color: var(--safelight); }
.mag-l {
  font-size: .6rem; letter-spacing: .14em; text-transform: uppercase; color: var(--wash);
}

.readout {
  display: flex; align-items: baseline; gap: .4rem;
  font-size: .8rem; color: var(--wash); margin-top: .4rem;
}
.readout #scoreNum, .readout #triesNum { color: var(--paper); font-size: 1.05rem; font-weight: 600; }
.readout-l { letter-spacing: .1em; text-transform: uppercase; font-size: .62rem; }
.readout-sep { opacity: .4; padding: 0 .3rem; }

/* ------------------------------------------------------------------ panels */
.panel { margin-top: 2rem; }

.guessbar { display: flex; gap: .5rem; }
#guess {
  flex: 1; min-width: 0;
  background: var(--deep); color: var(--paper);
  border: 1px solid var(--rule); border-radius: 2px;
  padding: .85rem 1rem; font: inherit; font-size: 1rem;
}
#guess::placeholder { color: var(--wash); opacity: .65; }
#guess:focus { border-color: var(--safelight); outline: none; }

.btn {
  font: inherit; font-size: .85rem; font-weight: 600;
  border-radius: 2px; cursor: pointer;
  padding: .85rem 1.2rem;
  border: 1px solid var(--rule); background: transparent; color: var(--paper);
  text-decoration: none; display: inline-flex; align-items: center; gap: .45rem;
  transition: background .18s, border-color .18s, color .18s;
}
.btn:hover { border-color: var(--safelight); }
.btn-go { background: var(--safelight); border-color: var(--safelight); color: #10202C; }
.btn-go:hover { filter: brightness(1.08); }
.btn-ghost { color: var(--wash); }
.btn-quiet { border-color: transparent; color: var(--wash); font-weight: 400; padding-inline: .6rem; }
.btn-quiet:hover { color: var(--miss); border-color: transparent; }
.btn[disabled] { opacity: .35; pointer-events: none; }
.cost { font-size: .72rem; opacity: .75; }

.controls { display: flex; justify-content: space-between; align-items: center; margin-top: .9rem; }

/* รายการคำที่ทายไปแล้ว */
.tries { list-style: none; margin: .9rem 0 0; padding: 0; display: flex; flex-wrap: wrap; gap: .4rem; }
.tries li {
  font-family: var(--mono); font-size: .72rem;
  border: 1px solid var(--rule); border-radius: 999px;
  padding: .25rem .7rem; color: var(--wash);
  text-decoration: line-through; text-decoration-color: var(--miss);
  animation: pop .3s var(--ease);
}
@keyframes pop { from { opacity: 0; transform: translateY(4px); } }

/* ------------------------------------------------------------------ result */
.result { animation: rise .5s var(--ease); }
@keyframes rise { from { opacity: 0; transform: translateY(14px); } }

.verdict {
  font-family: var(--display); font-weight: 900;
  font-size: clamp(1.5rem, 7vw, 2.1rem);
  letter-spacing: .04em; text-transform: uppercase;
  margin: 0 0 .3rem;
}
.verdict.win  { color: var(--fix); }
.verdict.lose { color: var(--miss); }

.reveal { margin: 0 0 .8rem; display: flex; align-items: baseline; gap: .55rem; flex-wrap: wrap; }
.reveal-l { font-size: .66rem; letter-spacing: .16em; text-transform: uppercase; color: var(--wash); }
.reveal-a { font-size: 1.35rem; font-weight: 600; }
.blurb { color: var(--wash); margin: 0 0 1.2rem; font-size: .92rem; }

.odometer { display: flex; flex-wrap: wrap; gap: .5rem; margin: 1.2rem 0; }
.odometer.wide { margin: 1.6rem 0 2rem; }
.chip {
  flex: 1 1 6rem; border: 1px solid var(--rule);
  padding: .6rem .7rem; border-radius: 2px; background: var(--deep);
}
.chip-v { display: block; font-family: var(--mono); font-size: 1.2rem; font-weight: 600; }
.chip-l {
  display: block; font-size: .58rem; letter-spacing: .12em;
  text-transform: uppercase; color: var(--wash); margin-top: .15rem;
}

/* กล่องบอกว่าคำตอบผิดของคุณจะไปเป็นกับดัก */
.legacy {
  border-left: 2px solid var(--safelight);
  background: linear-gradient(90deg, rgba(242,166,59,.09), transparent 70%);
  padding: .8rem 1rem; margin: 1.2rem 0;
}
.legacy-h {
  margin: 0 0 .2rem; font-size: .64rem; letter-spacing: .14em;
  text-transform: uppercase; color: var(--safelight);
}
.legacy-p { margin: 0; font-size: .9rem; color: var(--wash); }

.share { display: flex; gap: .6rem; flex-wrap: wrap; margin-top: 1.4rem; }

/* ------------------------------------------------------------ รอบกับดัก --- */
.trap {
  margin: 2.6rem 0 0; padding: 1.4rem 0 0;
  border-top: 1px solid var(--rule);
}
.trap-head { margin-bottom: 1rem; }
.trap-title {
  font-family: var(--display); font-weight: 900; text-transform: uppercase;
  letter-spacing: .1em; font-size: 1rem; color: var(--safelight); margin: 0 0 .3rem;
}
.trap-sub { margin: 0; font-size: .86rem; color: var(--wash); }

.trap-shot {
  height: 8rem; border: 1px solid var(--rule); border-radius: 2px;
  background-size: 380%; background-repeat: no-repeat; margin-bottom: 1rem;
}

.trap-opts { list-style: none; margin: 0; padding: 0; display: grid; gap: .5rem; }
.trap-opt {
  width: 100%; text-align: left; font: inherit; font-size: .95rem;
  background: var(--deep); color: var(--paper);
  border: 1px solid var(--rule); border-radius: 2px;
  padding: .8rem 1rem; cursor: pointer;
  transition: border-color .16s, background .16s, transform .16s;
}
.trap-opt:hover { border-color: var(--safelight); transform: translateX(3px); }
.trap-opt.right { border-color: var(--fix); color: var(--fix); }
.trap-opt.wrong { border-color: var(--miss); color: var(--miss); }
.trap-opt.dim { opacity: .4; }
.trap-opt[disabled] { cursor: default; transform: none; }

.trap-verdict { margin: 1rem 0 0; font-size: .92rem; }
.trap-verdict strong { display: block; font-size: 1.1rem; margin-bottom: .2rem; }
.trap-verdict.win strong { color: var(--fix); }
.trap-verdict.lose strong { color: var(--miss); }

/* ------------------------------------------------------- หน้าเนื้อหาทั่วไป */
.sheet-head { margin-bottom: 1.6rem; }
.eyebrow {
  font-size: .68rem; letter-spacing: .16em; text-transform: uppercase;
  color: var(--wash); margin: 0 0 .4rem;
}
.sheet-title {
  font-family: var(--display); font-weight: 900; text-transform: uppercase;
  font-size: clamp(1.9rem, 9vw, 2.8rem); letter-spacing: .05em;
  margin: 0 0 .5rem; line-height: 1.05;
}
.lede { color: var(--wash); margin: 0; font-size: .98rem; }

.crumbs { font-size: .74rem; color: var(--wash); margin-bottom: 1.4rem; }
.crumbs a { text-decoration: none; }
.crumbs a:hover { color: var(--paper); }
.crumbs span { opacity: .5; padding: 0 .25rem; }

/* การ์ดเฉลย เหมือนป้ายติดตัวอย่างในห้องแล็บ */
.specimen { margin: 0 0 1.6rem; }
.specimen-img {
  height: 15rem; border-radius: 2px;
  background-size: cover; background-position: center;
  border: 1px solid var(--rule);
}
.specimen-cap {
  display: flex; align-items: baseline; gap: .7rem; flex-wrap: wrap;
  border: 1px solid var(--rule); border-top: 0;
  padding: .9rem 1rem; background: var(--deep);
}
.specimen-l {
  font-family: var(--mono); font-size: .62rem; letter-spacing: .16em;
  text-transform: uppercase; color: var(--wash);
}
.specimen-a { font-size: 1.5rem; font-weight: 600; }

/* คำตอบผิดยอดฮิต */
.wrongs { margin: 2.4rem 0; }
.wrongs-h {
  font-family: var(--display); font-weight: 900; text-transform: uppercase;
  letter-spacing: .08em; font-size: 1rem; margin: 0 0 .3rem;
}
.wrongs-sub { color: var(--wash); font-size: .86rem; margin: 0 0 1rem; }
.wronglist { list-style: none; margin: 0; padding: 0; }
.wrongitem {
  display: flex; align-items: center; gap: .7rem;
  padding: .6rem 0; border-bottom: 1px solid var(--rule);
}
.wrongrank { font-size: .7rem; color: var(--wash); width: 1.6rem; }
.wrongtext { flex: 1; }
.wrongstar { color: var(--safelight); font-size: .8rem; }
.wrongvotes { font-size: .78rem; color: var(--wash); }
.wrongfoot { margin: 1rem 0 0; font-size: .84rem; color: var(--safelight); }

/* ขั้นตอนวิธีเล่น */
.steps { list-style: none; margin: 0 0 2.4rem; padding: 0; display: grid; gap: 1.4rem; }
.steps li { display: flex; gap: 1rem; }
.step-n { color: var(--safelight); font-size: .78rem; padding-top: .25rem; }
.steps h2 { font-size: 1rem; margin: 0 0 .25rem; font-weight: 600; }
.steps p { margin: 0; color: var(--wash); font-size: .9rem; }

.faq { margin: 2.4rem 0; }
.faq-h {
  font-family: var(--display); font-weight: 900; text-transform: uppercase;
  letter-spacing: .08em; font-size: 1rem; margin: 0 0 .8rem;
}
.faq-item { border-bottom: 1px solid var(--rule); }
.faq-item summary {
  cursor: pointer; padding: .85rem 0; font-weight: 500; list-style: none;
  display: flex; justify-content: space-between; gap: 1rem;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; color: var(--safelight); }
.faq-item[open] summary::after { content: "−"; }
.faq-item p { margin: 0 0 1rem; color: var(--wash); font-size: .9rem; }

/* คลังโจทย์ */
.grid { list-style: none; margin: 0 0 2rem; padding: 0; display: grid; gap: 1rem;
  grid-template-columns: repeat(auto-fill, minmax(9rem, 1fr)); }
.card { border: 1px solid var(--rule); border-radius: 2px; overflow: hidden; background: var(--deep); }
.card-a { display: block; text-decoration: none; position: relative; }
.card-img { display: block; height: 7rem; background-size: 320%; background-repeat: no-repeat; }
.card-meta { display: block; padding: .6rem .7rem .1rem; }
.card-no { display: block; font-size: .78rem; color: var(--safelight); }
.card-date { display: block; font-size: .7rem; color: var(--wash); }
.card-rate {
  position: absolute; top: .5rem; right: .5rem;
  background: rgba(6,20,32,.82); padding: .12rem .4rem;
  font-size: .68rem; border: 1px solid var(--rule);
}
.card-ans {
  display: block; padding: .5rem .7rem .7rem;
  font-size: .7rem; color: var(--wash); text-decoration: none;
}
.card-ans:hover { color: var(--safelight); }

.pager { display: flex; gap: .3rem; flex-wrap: wrap; margin-bottom: 2rem; }
.pager a {
  border: 1px solid var(--rule); padding: .35rem .7rem;
  font-family: var(--mono); font-size: .78rem; text-decoration: none; color: var(--wash);
}
.pager a.on { background: var(--rule); color: var(--paper); }

.stepnav { display: flex; justify-content: space-between; gap: 1rem; margin: 2rem 0 0;
  font-family: var(--mono); font-size: .8rem; }
.stepnav a { color: var(--wash); text-decoration: none; }
.stepnav a:hover { color: var(--safelight); }

.credit { text-align: center; font-size: .7rem; color: var(--wash); margin: 2rem 0 0; opacity: .7; }

/* ข้อความอธิบายท้ายหน้า */
.prose { padding-top: 3rem; padding-bottom: 1rem; }
.prose h2 {
  font-family: var(--display); font-weight: 900; text-transform: uppercase;
  letter-spacing: .08em; font-size: .95rem; color: var(--wash); margin: 0 0 .8rem;
}
.prose p { color: var(--wash); font-size: .9rem; margin: 0 0 .9rem; }
.prose strong { color: var(--paper); }

.empty { text-align: center; padding-top: 5rem; }
.empty h1 { font-family: var(--display); font-weight: 900; text-transform: uppercase; letter-spacing: .06em; }
.empty p { color: var(--wash); margin-bottom: 1.6rem; }

/* ------------------------------------------------------------------ footer */
.footer { border-top: 1px solid var(--rule); margin-top: 4rem; padding: 2rem var(--gut) 3rem; }
.footer-in { max-width: var(--col); margin: 0 auto; }
.footer-tag { color: var(--wash); font-size: .86rem; margin: 0 0 1rem; max-width: 24rem; }
.footer-nav { display: flex; gap: 1.1rem; flex-wrap: wrap; font-size: .8rem; margin-bottom: 1rem; }
.footer-nav a { color: var(--wash); text-decoration: none; }
.footer-nav a:hover { color: var(--paper); }
.footer-fine { font-family: var(--mono); font-size: .68rem; color: var(--wash); opacity: .6; margin: 0; }

/* ---------------------------------------------------------------- โทสต์ */
.toast {
  position: fixed; left: 50%; bottom: 1.6rem; transform: translateX(-50%) translateY(1rem);
  background: var(--safelight); color: #10202C;
  padding: .6rem 1.1rem; border-radius: 2px; font-size: .85rem; font-weight: 600;
  opacity: 0; pointer-events: none; transition: opacity .25s, transform .25s var(--ease); z-index: 50;
}
.toast.on { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ------------------------------------------------------------- responsive */
@media (min-width: 46rem) {
  :root { --col: 38rem; }
  .grid { grid-template-columns: repeat(auto-fill, minmax(10.5rem, 1fr)); }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important; animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
}