/* =====================================================
   K-Redactle — style.css
   Dark mode, Noto Sans KR, premium feel
   ===================================================== */

/* ── Footer ────────────────────────────────────────── */
.game-footer {
  margin-top: 4rem;
  padding: 2rem 0;
  border-top: 1px solid var(--border);
  text-align: center;
  color: var(--text-dim);
  font-size: 0.8rem;
}
.game-footer p { margin-bottom: 0.4rem; }
.game-footer a { color: var(--text-muted); text-decoration: none; }
.game-footer a:hover { text-decoration: underline; }

:root {
  --bg:         #0d0f14;
  --bg-2:       #13161e;
  --bg-3:       #1b1f2b;
  --bg-4:       #222738;
  --border:     #2a2f42;
  --text:       #e8eaf0;
  --text-muted: #7b82a0;
  --text-dim:   #4a5070;
  --accent:     #6366f1;
  --accent-2:   #818cf8;
  --green:      #22c55e;
  --green-bg:   rgba(34,197,94,.15);
  --red:        #ef4444;
  --red-bg:     rgba(239,68,68,.12);
  --gold:       #f59e0b;
  --redacted:   #2e3348;
  --redacted-hover: #38405a;
  --reveal-glow: rgba(99,102,241,.25);
  --radius:     10px;
  --radius-sm:  6px;
  --shadow:     0 4px 24px rgba(0,0,0,.6);
  --transition: .18s ease;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: 'Noto Sans KR', sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  overflow-x: hidden;
}

/* ── Loading ───────────────────────────────────────── */
.loading-screen {
  position: fixed; inset: 0;
  background: var(--bg);
  display: flex; align-items: center; justify-content: center;
  z-index: 9999;
  transition: opacity .5s, visibility .5s;
}
.loading-screen.fade-out { opacity: 0; visibility: hidden; }
.loading-inner { text-align: center; }
.loading-logo {
  font-size: 2.2rem; font-weight: 700;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 2rem; letter-spacing: -.5px;
}
.loading-spinner {
  width: 44px; height: 44px; margin: 0 auto 1.2rem;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin .8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.loading-text { color: var(--text-muted); font-size: .9rem; }

/* ── Overlays ──────────────────────────────────────── */
.overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,.75);
  backdrop-filter: blur(6px);
  display: flex; align-items: center; justify-content: center;
  z-index: 100;
  animation: fadeIn .3s ease;
}
@keyframes fadeIn { from { opacity: 0 } to { opacity: 1 } }
.overlay.hidden { display: none; }

.overlay-card {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 2.5rem 2rem;
  max-width: 420px; width: 90%;
  text-align: center;
  box-shadow: var(--shadow);
  animation: slideUp .35s cubic-bezier(.16,1,.3,1);
  position: relative; /* Add position relative for close button */
}

.overlay-close {
  position: absolute;
  top: 1rem;
  right: 1.2rem;
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.4rem;
  cursor: pointer;
  padding: .5rem;
  line-height: 1;
  transition: color var(--transition), transform var(--transition);
}
.overlay-close:hover { color: var(--text); transform: scale(1.1); }
@keyframes slideUp { from { transform: translateY(20px); opacity:0 } to { transform: translateY(0); opacity:1 } }

.overlay-emoji { font-size: 3.5rem; margin-bottom: 1rem; }
.overlay-title { font-size: 1.8rem; font-weight: 700; margin-bottom: .5rem; }
.overlay-article-name {
  font-size: 1.4rem; font-weight: 700;
  color: var(--accent-2); margin-bottom: 1.8rem;
  word-break: keep-all;
}

.stats-grid {
  display: flex; gap: 1rem; justify-content: center; margin-bottom: 1.8rem;
}
.stat-box {
  background: var(--bg-3); border: 1px solid var(--border);
  border-radius: var(--radius); padding: .9rem 1.4rem;
  display: flex; flex-direction: column; align-items: center; gap: .2rem;
  flex: 1;
}
.stat-value { font-size: 2rem; font-weight: 700; font-family: 'JetBrains Mono', monospace; color: var(--accent-2); }
.stat-label { font-size: .75rem; color: var(--text-muted); }

.overlay-buttons { display: flex; gap: .75rem; flex-wrap: wrap; justify-content: center; }

/* ── Buttons ───────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: .4rem; padding: .6rem 1.2rem;
  border: 1px solid transparent; border-radius: var(--radius-sm);
  font-family: inherit; font-size: .9rem; font-weight: 500;
  cursor: pointer; transition: all var(--transition);
  white-space: nowrap;
}
.btn-primary {
  background: var(--accent); color: #fff; border-color: var(--accent);
}
.btn-primary:hover { background: var(--accent-2); border-color: var(--accent-2); transform: translateY(-1px); }
.btn-primary:active { transform: translateY(0); }

.btn-ghost {
  background: transparent; color: var(--text-muted); border-color: var(--border);
}
.btn-ghost:hover { background: var(--bg-3); color: var(--text); border-color: var(--bg-4); }

.btn-danger { color: var(--red); }
.btn-danger:hover { background: var(--red-bg); border-color: var(--red); color: var(--red); }

.btn-sm { padding: .35rem .7rem; font-size: .82rem; }
.btn-submit { padding: .6rem 1rem; font-size: 1.1rem; border-radius: var(--radius-sm); min-width: 44px; }

/* ── Header ────────────────────────────────────────── */
.header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(13,15,20,.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  max-width: 1400px; margin: 0 auto;
  padding: .75rem 1.5rem;
  display: flex; align-items: center; gap: 1rem;
}
.logo {
  font-size: 1.3rem; font-weight: 700;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: -.3px; flex-shrink: 0;
}
.header-meta { flex: 1; }
.header-progress { font-size: .8rem; color: var(--text-muted); font-family: 'JetBrains Mono', monospace; }
.header-actions { display: flex; gap: .5rem; }

/* How to play */
.how-to-play {
  position: fixed; top: 60px; right: 1rem;
  background: var(--bg-2); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1.2rem 1.4rem;
  max-width: 300px; z-index: 60;
  box-shadow: var(--shadow);
  animation: fadeIn .2s ease;
}
.how-to-play.hidden { display: none; }
.how-to-play h3 { font-size: 1rem; margin-bottom: .8rem; }
.how-to-play ul { list-style: none; display: flex; flex-direction: column; gap: .55rem; }
.how-to-play li { font-size: .85rem; color: var(--text-muted); line-height: 1.5; }
.how-to-play-close {
  position: absolute; top: .7rem; right: .8rem;
  background: none; border: none; color: var(--text-muted);
  cursor: pointer; font-size: .9rem;
}
.redacted-demo {
  display: inline-block; background: var(--redacted);
  color: var(--redacted); border-radius: 3px; padding: 0 4px; font-size: .85rem;
}
.revealed-demo { color: var(--green); font-weight: 600; }

/* ── Layout ────────────────────────────────────────── */
.app.hidden { display: none; }
.main {
  max-width: 1400px; margin: 0 auto;
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 0;
  height: calc(100vh - 53px);
  overflow: hidden;
}

/* ── Sidebar ───────────────────────────────────────── */
.sidebar {
  border-right: 1px solid var(--border);
  padding: 1.25rem 1rem;
  display: flex; flex-direction: column; gap: 1rem;
  height: 100%;
  overflow-y: auto;
}
.sidebar::-webkit-scrollbar { width: 4px; }
.sidebar::-webkit-scrollbar-track { background: transparent; }
.sidebar::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

.input-label { display: block; font-size: .78rem; color: var(--text-muted); margin-bottom: .4rem; font-weight: 500; letter-spacing: .02em; text-transform: uppercase; }
.input-row { display: flex; gap: .5rem; }
.guess-input {
  flex: 1; background: var(--bg-3); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: .6rem .9rem;
  color: var(--text); font-family: 'Noto Sans KR', sans-serif; font-size: .95rem;
  outline: none; transition: border-color var(--transition), box-shadow var(--transition);
}
.guess-input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--reveal-glow); }
.guess-input::placeholder { color: var(--text-dim); }
.guess-error { font-size: .8rem; color: var(--red); margin-top: .3rem; }
.guess-error.hidden { display: none; }

.stats-summary {
  display: flex; align-items: center; gap: .5rem;
  background: var(--bg-3); border: 1px solid var(--border);
  border-radius: var(--radius); padding: .7rem .9rem;
}
.stat-inline { display: flex; flex-direction: column; align-items: center; flex: 1; }
.stat-inline-value { font-size: 1.3rem; font-weight: 700; font-family: 'JetBrains Mono', monospace; color: var(--accent-2); }
.stat-inline-label { font-size: .7rem; color: var(--text-muted); }
.stat-divider { width: 1px; background: var(--border); align-self: stretch; }

.progress-bar-wrap {
  height: 6px; background: var(--bg-3); border-radius: 3px; overflow: hidden;
}
.progress-bar {
  height: 100%; background: linear-gradient(90deg, var(--accent), var(--green));
  border-radius: 3px; transition: width .5s cubic-bezier(.16,1,.3,1);
}
.progress-label { font-size: .75rem; color: var(--text-muted); text-align: right; }

.guess-history-header {
  font-size: .78rem; font-weight: 500; color: var(--text-muted);
  text-transform: uppercase; letter-spacing: .05em;
  padding-bottom: .4rem; border-bottom: 1px solid var(--border);
}
.guess-history { list-style: none; display: flex; flex-direction: column; gap: .3rem; }
.guess-item {
  display: flex; align-items: center; justify-content: space-between;
  padding: .45rem .7rem; border-radius: var(--radius-sm);
  font-size: .9rem; border: 1px solid transparent;
  animation: slideIn .2s ease;
}
@keyframes slideIn { from { opacity:0; transform:translateY(-6px) } to { opacity:1; transform:translateY(0) } }
.guess-item.correct {
  background: var(--green-bg); border-color: rgba(34,197,94,.3);
  color: var(--green);
}
.guess-item.wrong {
  background: var(--bg-3); border-color: var(--border);
  color: var(--text-muted);
}
.guess-item-word { font-weight: 600; font-family: 'Noto Sans KR', sans-serif; }
.guess-item-count {
  font-size: .78rem; font-family: 'JetBrains Mono', monospace;
  background: rgba(255,255,255,.06); padding: .15rem .5rem; border-radius: 99px;
}

/* ── Article ───────────────────────────────────────── */
.article-section { padding: 2rem 2.5rem; overflow-y: auto; height: 100%; }
.article-title-bar {
  display: flex; align-items: baseline; gap: 1rem;
  margin-bottom: 1.8rem; padding-bottom: 1rem;
  border-bottom: 1px solid var(--border);
}
.article-label { font-size: .75rem; color: var(--text-muted); font-weight: 500; text-transform: uppercase; letter-spacing: .05em; flex-shrink: 0; }
.article-title-redacted { font-size: 1.5rem; font-weight: 700; }

.article-content {
  font-size: 1rem; line-height: 2; color: var(--text);
  max-width: 800px; word-break: keep-all;
}
.article-content p { margin-bottom: 1.4rem; }

/* Token spans */
.token { display: inline; }

.token-redacted {
  display: inline-flex;
  vertical-align: middle;
  cursor: pointer;
  transition: opacity var(--transition);
  position: relative;
}

/* Character count indicator */
.char-count-badge {
  position: absolute;
  top: -1.2rem;
  left: 50%;
  transform: translateX(-50%);
  background: var(--primary-color);
  color: white;
  font-size: 0.7rem;
  padding: 1px 4px;
  border-radius: 4px;
  pointer-events: none;
  white-space: nowrap;
  opacity: 0;
  transition: opacity 0.2s, top 0.2s;
  z-index: 10;
}
.token-redacted.show-count .char-count-badge {
  opacity: 1;
  top: -1.5rem;
}
.token-redacted-char {
  display: inline-block;
  background: var(--redacted);
  border-radius: 2px;
  height: 1.1em;
  width: 0.9em; /* slightly narrower for character blocks */
  transition: background var(--transition);
}
.token-redacted:hover .token-redacted-char { background: var(--redacted-hover); }

/* Revealed token */
.token-revealed {
  display: inline;
  color: var(--green);
  font-weight: 600;
  animation: revealPop .35s cubic-bezier(.16,1,.3,1);
}
@keyframes revealPop {
  from { opacity:0; transform: scale(.85); color: #fff; }
  60%  { color: #fff; }
  to   { opacity:1; transform: scale(1); color: var(--green); }
}

/* Title token reveal */
.token-title-revealed {
  display: inline;
  color: var(--gold);
  font-weight: 700;
  animation: revealPop .4s cubic-bezier(.16,1,.3,1);
}

/* Footer */
footer {
    margin-top: 4rem;
    padding: 2rem;
    text-align: center;
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
    font-size: 0.85rem;
}

footer a {
    color: var(--primary-color);
    text-decoration: none;
}

footer a:hover {
    text-decoration: underline;
}

/* Highlighting */
.highlight-active {
  background: var(--gold) !important;
  color: #000 !important;
  border-radius: 2px;
  box-shadow: 0 0 8px var(--gold);
  z-index: 5;
  position: relative;
}

@media (max-width: 768px) {
  .main { grid-template-columns: 1fr; }
  .sidebar {
    position: static; height: auto;
    border-right: none; border-bottom: 1px solid var(--border);
  }
  .article-section { padding: 1.2rem 1rem; }
  .how-to-play { right: .5rem; left: .5rem; max-width: none; }
}