@import url('https://fonts.googleapis.com/css2?family=Special+Elite&family=Cutive+Mono&display=swap');

:root {
  --bg: #dcc8a9;
  /* Aged Manila Folder */
  --paper: #f4f1ea;
  /* Old Paper */
  --ink: #1a1a1a;
  --ink-faded: #3a3a3a;
  --border: #8b7355;

  --yes-stamp: #2d5a27;
  /* Faded Green Ink */
  --no-stamp: #8b0000;
  /* Faded Red Ink */

  --cell: 34px;
}

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

body {
  font-family: 'Special Elite', cursive;
  background: var(--bg);
  background-image:
    url('https://www.transparenttextures.com/patterns/paper-fibers.png'),
    linear-gradient(rgba(0, 0, 0, 0.05) 1px, transparent 1px);
  background-size: auto, 100% 3px;
  min-height: 100vh;
  color: var(--ink);
  padding: 2rem;
}

/* ── HEADER ── */
.hdr {
  position: relative;
  max-width: 900px;
  margin: 0 auto 3rem;
  padding: 2rem;
  background: #cbb694;
  border: 2px solid var(--border);
  box-shadow: 5px 5px 15px rgba(0, 0, 0, 0.2);
  transform: rotate(-1deg);
}

.hdr::before {
  content: 'TOP SECRET';
  position: absolute;
  top: 10px;
  right: 20px;
  border: 3px solid var(--no-stamp);
  color: var(--no-stamp);
  padding: 0.2rem 1rem;
  font-weight: 900;
  transform: rotate(5deg);
  opacity: 0.8;
}

.hdr-title {
  font-size: 3.5rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 0.5rem;
}

.hdr-sub {
  font-family: 'Cutive Mono', monospace;
  font-size: 1.1rem;
  border-top: 1px solid var(--border);
  padding-top: 0.5rem;
}

/* ── TOOLBAR ── */
.toolbar {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 2rem;
}

.tbtn {
  font-family: 'Special Elite', cursive;
  padding: 0.5rem 1.5rem;
  background: var(--paper);
  border: 1px solid var(--border);
  cursor: pointer;
  box-shadow: 2px 2px 5px rgba(0, 0, 0, 0.1);
  transition: all 0.2s;
}

.tbtn:hover {
  background: #e9e5d8;
  transform: translateY(-2px);
}

.tbtn.f-all {
  border-bottom: 4px solid var(--ink);
}

/* ── CARD ── */
.card {
  max-width: 1000px;
  margin: 0 auto 4rem;
  background: var(--paper);
  border: 1px solid #d1d1d1;
  box-shadow: 10px 10px 20px rgba(0, 0, 0, 0.15);
  position: relative;
  overflow: hidden;
}

/* Paper Clip decoration */
.card::after {
  content: '';
  position: absolute;
  top: -10px;
  left: 40px;
  width: 25px;
  height: 60px;
  background: linear-gradient(90deg, #999, #ccc, #999);
  border-radius: 10px;
  opacity: 0.5;
  z-index: 10;
}

.card-head {
  padding: 1.5rem 2.5rem;
  border-bottom: 2px solid #ddd;
}

.card-title {
  font-size: 2rem;
  color: #333;
  margin-bottom: 0.75rem;
}

.card-desc {
  font-style: italic;
  color: #666;
  line-height: 1.6;
}

.card-body {
  display: grid;
  grid-template-columns: 300px 1fr;
}

/* Clues - Yellow Legal Pad Aesthetic */
.clues-panel {
  padding: 3rem 1rem 2rem 3rem;
  background: #fdfd8e;
  /* Legal Pad Yellow */
  background-image:
    linear-gradient(rgba(0, 0, 255, 0.1) 1px, transparent 1px),
    linear-gradient(90deg, transparent 40px, #ff4d4d 40px, #ff4d4d 42px, transparent 42px);
  background-size: 100% 1.8rem, 100% 100%;
  border-right: 2px solid var(--border);
  box-shadow: inset 0 0 10px rgba(0, 0, 0, 0.05);
  position: relative;
  min-height: 400px;
}

.clues-panel::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1.5rem;
  background: #d4a017;
  /* Top binding */
  border-bottom: 2px solid #a67c00;
}

.clues-lbl {
  font-family: 'Special Elite', cursive;
  font-size: 1.4rem;
  font-weight: 900;
  margin-bottom: 1.5rem;
  text-decoration: underline;
  color: #333;
}

.clue-list {
  padding-left: 2.5rem;
  margin: 0;
}

.clue-li {
  font-family: 'Cutive Mono', monospace;
  font-size: 1.1rem;
  padding: 0 0 0.8rem 0;
  line-height: 1.8rem;
  color: #222;
  list-style-type: decimal;
}

/* Grid Panel */
.grid-panel {
  padding: 2rem;
  background: #fff;
  background-image: radial-gradient(#eee 1px, transparent 1px);
  background-size: 20px 20px;
}

/* ── MULTIGRID ── */
.mg {
  border-collapse: collapse;
  margin: 0 auto;
}

.mg .cg-hdr {
  background: #eee !important;
  color: var(--ink) !important;
  font-size: 0.9rem;
  padding: 5px;
  border: 1px solid #ccc;
  text-transform: uppercase;
}

.mg .ci-hdr {
  height: 100px;
  border: 1px solid #ccc;
}

.mg .ci-hdr-txt {
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  font-size: 0.85rem;
  padding: 5px;
}

.mg .ri-hdr {
  padding: 5px 15px;
  border: 1px solid #ccc;
  text-align: right;
  font-size: 0.95rem;
}

.mg .rg-hdr {
  writing-mode: vertical-lr;
  transform: rotate(180deg);
  background: #eee !important;
  color: var(--ink) !important;
  padding: 5px;
  border: 1px solid #ccc;
  text-transform: uppercase;
}

.mg .sec-col {
  border-left: 4px solid var(--ink) !important;
}

.mg .sec-row {
  border-top: 4px solid var(--ink) !important;
}

.mg .cell {
  width: var(--cell);
  height: var(--cell);
  border: 1px solid #ddd;
  cursor: pointer;
  position: relative;
}

.mg .cell:hover {
  background: #f0f8ff;
}

/* Markers as Ink Stamps */
.mg .cell.yes::after {
  content: '✓';
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  font-weight: 900;
  color: var(--yes-stamp);
  transform: rotate(-5deg) scale(0.9);
  opacity: 0.75;
  animation: stamp 0.1s ease-out;
}

.mg .cell.no::after {
  content: '✕';
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  font-weight: 900;
  color: var(--no-stamp);
  transform: rotate(8deg) scale(1);
  opacity: 0.75;
  animation: stamp 0.1s ease-out;
}

@keyframes stamp {
  from {
    transform: scale(3);
    opacity: 0;
  }

  to {
    transform: rotate(var(--rot, -10deg)) scale(0.9);
    opacity: 0.7;
  }
}

/* ── FOOTER ── */
.card-foot {
  padding: 1.5rem 2.5rem;
  background: #fcfcfc;
  display: flex;
  gap: 1rem;
}

.btn {
  font-family: 'Special Elite', cursive;
  padding: 0.5rem 2rem;
  border: 2px solid var(--ink);
  background: transparent;
  cursor: pointer;
  text-transform: uppercase;
}

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

.solved-banner {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) rotate(-25deg);
  border: 8px double var(--yes-stamp);
  color: var(--yes-stamp);
  padding: 1rem 3rem;
  font-size: 4rem;
  font-weight: 900;
  background: rgba(255, 255, 255, 0.9);
  z-index: 100;
  display: none;
  pointer-events: none;
}

.solved-banner.show {
  display: block;
}

/* ── CELEBRATION ── */
.stamp-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2000;
  pointer-events: none;
}

.case-closed-stamp {
  font-size: 10vw;
  font-weight: 900;
  color: #8b0000;
  border: 15px double #8b0000;
  padding: 2rem 5rem;
  transform: rotate(-20deg);
  opacity: 0.8;
  background: rgba(255, 255, 255, 0.1);
  animation: stamp-big 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275) both;
}

@keyframes stamp-big {
  from {
    transform: scale(5) rotate(0deg);
    opacity: 0;
  }

  to {
    transform: scale(1) rotate(-20deg);
    opacity: 0.8;
  }
}