/* ═══════════════════════════════════════════════
   Chess Tools — Main Stylesheet
   Imports all modular CSS files.
   ═══════════════════════════════════════════════ */

@import "modules/base.css";
@import "modules/auth.css";
@import "modules/topbar.css";
@import "modules/main_menu.css";
@import "modules/leaderboard.css";
@import "modules/puzzle.css";
@import "modules/chat.css";
@import "modules/history.css";
@import "modules/achievements.css";
@import "modules/profile.css";
@import "modules/training.css";
@import "modules/battle.css";
@import "modules/arena.css";
@import "modules/simul.css";

/* ── Legacy content below — safe to delete once imports are verified ── */
:root {
  --bg:      #0d0f0e;
  --bg2:     #141714;
  --bg3:     #1c201b;
  --border:  #2a2e29;
  --accent:  #b5e550;
  --accent2: #7ab52a;
  --text:    #e8eae6;
  --text2:   #8a9087;
  --text3:   #4a4f47;
  --danger:  #e55050;
  --warn:    #e5a550;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  background: var(--bg); color: var(--text);
  font-family: 'IBM Plex Sans', sans-serif;
  min-height: 100vh; overflow-x: hidden;
}
.page { display: none; min-height: 100vh; }
.page.active { display: flex; }

/* ── AUTH ── */
#page-login, #page-register {
  align-items: center; justify-content: center;
  background:
    radial-gradient(ellipse at 20% 50%, #1a2e0f33 0%, transparent 60%),
    radial-gradient(ellipse at 80% 20%, #0f1f0a33 0%, transparent 50%), var(--bg);
  position: relative;
}
.auth-bg-pattern {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 40px 40px; opacity: 0.3; pointer-events: none;
}
.auth-card {
  background: var(--bg2); border: 1px solid var(--border);
  border-radius: 2px; padding: 48px 44px; width: 400px;
  position: relative; z-index: 1;
  box-shadow: 0 0 80px #00000088, 0 0 0 1px #b5e55011;
}
.auth-logo {
  font-family: 'Playfair Display', serif; font-size: 13px;
  letter-spacing: 0.25em; text-transform: uppercase;
  color: var(--accent); margin-bottom: 8px;
}
.auth-title {
  font-family: 'Playfair Display', serif; font-size: 32px;
  font-weight: 900; margin-bottom: 8px; line-height: 1.1;
}
.auth-subtitle { font-size: 13px; color: var(--text2); margin-bottom: 36px; line-height: 1.6; }
.field-group { margin-bottom: 18px; }
.field-group label {
  display: block; font-family: 'IBM Plex Mono', monospace;
  font-size: 11px; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--text2); margin-bottom: 8px;
}
.field-group input {
  width: 100%; background: var(--bg3); border: 1px solid var(--border);
  color: var(--text); padding: 12px 16px;
  font-family: 'IBM Plex Mono', monospace; font-size: 14px;
  border-radius: 1px; outline: none; transition: border-color 0.2s;
}
.field-group input:focus { border-color: var(--accent); box-shadow: 0 0 0 2px #b5e55018; }
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: 8px; padding: 12px 24px;
  font-family: 'IBM Plex Mono', monospace; font-size: 13px;
  letter-spacing: 0.05em; border: none; border-radius: 1px;
  cursor: pointer; transition: all 0.15s; text-decoration: none;
}
.btn-primary {
  background: var(--accent); color: #0d0f0e; width: 100%;
  font-weight: 500; margin-bottom: 12px;
}
.btn-primary:hover { background: #c9f060; transform: translateY(-1px); }
.btn-ghost {
  background: transparent; color: var(--text2);
  border: 1px solid var(--border); margin-bottom: 10px;
}
.btn-ghost:hover { border-color: var(--text2); color: var(--text); }
.auth-divider {
  text-align: center; font-size: 12px; color: var(--text3);
  margin: 16px 0; position: relative;
}
.auth-divider::before, .auth-divider::after {
  content: ''; position: absolute; top: 50%;
  width: 40%; height: 1px; background: var(--border);
}
.auth-divider::before { left: 0; } .auth-divider::after { right: 0; }
.auth-link { text-align: center; font-size: 13px; color: var(--text2); margin-top: 20px; }
.auth-link a { color: var(--accent); text-decoration: none; cursor: pointer; }
.auth-link a:hover { text-decoration: underline; }
.msg {
  font-family: 'IBM Plex Mono', monospace; font-size: 12px;
  padding: 10px 14px; border-radius: 1px; margin-bottom: 16px; display: none;
}
.msg.error   { background: #e5505018; border: 1px solid #e5505044; color: var(--danger); display: block; }
.msg.success { background: #b5e55018; border: 1px solid #b5e55044; color: var(--accent); display: block; }

/* ── TOPBAR ── */
.topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 24px; border-bottom: 1px solid var(--border);
  background: var(--bg2); flex-shrink: 0; gap: 12px;
}
.topbar-logo {
  font-family: 'Playfair Display', serif; font-size: 18px;
  font-weight: 900; color: var(--accent); white-space: nowrap;
}
.topbar-right { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.topbar-user-info {
  display: flex; align-items: center; gap: 8px;
  padding: 4px 10px; background: var(--bg3);
  border: 1px solid var(--border); border-radius: 2px;
}
.user-badge { font-family: 'IBM Plex Mono', monospace; font-size: 12px; color: var(--text); font-weight: 500; }
.elo-badge {
  font-family: 'IBM Plex Mono', monospace; font-size: 11px;
  color: var(--accent); background: #b5e55015;
  border: 1px solid #b5e55030; padding: 1px 8px; border-radius: 2px;
}
.pts-badge {
  font-family: 'IBM Plex Mono', monospace; font-size: 11px;
  color: var(--warn); background: #e5a55015;
  border: 1px solid #e5a55030; padding: 1px 8px; border-radius: 2px;
}
.btn-sm { padding: 6px 12px; font-size: 11px; margin-bottom: 0 !important; }

/* ── MAIN MENU ── */
#page-main { flex-direction: column; }
.main-content {
  flex: 1; display: flex; flex-direction: column;
  align-items: center; justify-content: center; padding: 60px 32px;
}
.main-heading {
  font-family: 'Playfair Display', serif; font-size: 14px;
  letter-spacing: 0.3em; text-transform: uppercase;
  color: var(--text2); margin-bottom: 16px;
}
.main-title {
  font-family: 'Playfair Display', serif; font-size: 52px;
  font-weight: 900; text-align: center; margin-bottom: 56px; line-height: 1.1;
}
.tool-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; width: 100%; max-width: 700px; }
.tool-card {
  background: var(--bg2); border: 1px solid var(--border);
  border-radius: 2px; padding: 36px 32px;
  cursor: pointer; transition: all 0.2s; position: relative; overflow: hidden;
}
.tool-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: var(--accent); transform: scaleX(0);
  transition: transform 0.2s; transform-origin: left;
}
.tool-card:hover { border-color: #3a3f38; box-shadow: 0 8px 40px #00000060; }
.tool-card:hover::before { transform: scaleX(1); }
.tool-card.disabled { opacity: 0.4; cursor: not-allowed; }
.tool-card.disabled:hover { border-color: var(--border); box-shadow: none; }
.tool-card.disabled:hover::before { transform: scaleX(0); }
.tool-icon { font-size: 36px; margin-bottom: 16px; }
.tool-name { font-family: 'Playfair Display', serif; font-size: 22px; font-weight: 700; margin-bottom: 8px; }
.tool-desc { font-size: 13px; color: var(--text2); line-height: 1.6; }
.tool-badge {
  display: inline-block; font-family: 'IBM Plex Mono', monospace;
  font-size: 9px; letter-spacing: 0.1em; text-transform: uppercase;
  padding: 3px 8px; border-radius: 1px; margin-top: 12px;
  background: #2a2e29; color: var(--text3);
}
.tool-badge.live { background: #b5e55022; color: var(--accent); }

/* ── LEADERBOARD ── */
#page-leaderboard { flex-direction: column; }
.lb-content { flex: 1; padding: 40px 32px; max-width: 900px; margin: 0 auto; width: 100%; }
.lb-header { margin-bottom: 8px; }
.lb-table-wrap { background: var(--bg2); border: 1px solid var(--border); border-radius: 2px; overflow: hidden; }
.lb-tabs { display: flex; border-bottom: 1px solid var(--border); }
.lb-tab {
  background: transparent; border: none; border-bottom: 2px solid transparent;
  color: var(--text2); padding: 12px 24px;
  font-family: 'IBM Plex Mono', monospace; font-size: 12px;
  letter-spacing: 0.08em; text-transform: uppercase;
  cursor: pointer; transition: all 0.15s; margin-bottom: -1px;
}
.lb-tab:hover { color: var(--text); }
.lb-tab.active { color: var(--accent); border-bottom-color: var(--accent); }
.lb-table { width: 100%; border-collapse: collapse; }
.lb-table th {
  font-family: 'IBM Plex Mono', monospace; font-size: 10px;
  letter-spacing: 0.12em; text-transform: uppercase; color: var(--text3);
  padding: 12px 16px; text-align: left; border-bottom: 1px solid var(--border);
}
.lb-table td {
  font-family: 'IBM Plex Mono', monospace; font-size: 13px;
  color: var(--text2); padding: 13px 16px; border-bottom: 1px solid #1e221d;
}
.lb-table tr:last-child td { border-bottom: none; }
.lb-table tr:hover td { background: #181c17; }
.lb-rank { color: var(--text3); font-size: 12px; }
.lb-rank.top1 { color: #ffd700; font-weight: 700; }
.lb-rank.top2 { color: #c0c0c0; font-weight: 700; }
.lb-rank.top3 { color: #cd7f32; font-weight: 700; }
.lb-me td { background: #b5e55010 !important; color: var(--text) !important; }
.lb-pts  { color: var(--warn) !important; font-weight: 500; }
.lb-elo  { color: var(--accent) !important; }

/* ── PUZZLE PAGE ── */
#page-puzzle { flex-direction: column; }
.puzzle-layout {
  flex: 1; display: grid;
  grid-template-columns: 260px 1fr 260px;
  gap: 20px; padding: 20px;
  max-width: 1400px; margin: 0 auto; width: 100%;
}
.puzzle-sidebar-left  { display: flex; flex-direction: column; gap: 14px; }
.puzzle-sidebar-right { display: flex; flex-direction: column; gap: 14px; }
.puzzle-center        { display: flex; flex-direction: column; align-items: center; gap: 12px; }

.panel {
  background: var(--bg2); border: 1px solid var(--border);
  border-radius: 2px; padding: 18px;
}
.panel-title {
  font-family: 'IBM Plex Mono', monospace; font-size: 10px;
  letter-spacing: 0.2em; text-transform: uppercase;
  color: var(--text3); margin-bottom: 14px;
}
.filter-group { margin-bottom: 14px; }
.filter-label {
  font-family: 'IBM Plex Mono', monospace; font-size: 11px;
  letter-spacing: 0.08em; color: var(--text2); margin-bottom: 8px;
  display: flex; justify-content: space-between; align-items: center;
}
.filter-label span { color: var(--accent); font-weight: 500; }
.range-row { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.range-input {
  background: var(--bg3); border: 1px solid var(--border);
  color: var(--text); padding: 8px 10px;
  font-family: 'IBM Plex Mono', monospace; font-size: 12px;
  border-radius: 1px; outline: none; width: 100%; text-align: center;
}
.range-input:focus { border-color: var(--accent); }
.range-input:disabled { opacity: 0.4; cursor: not-allowed; }
select {
  width: 100%; background: var(--bg3); border: 1px solid var(--border);
  color: var(--text); padding: 10px 12px;
  font-family: 'IBM Plex Mono', monospace; font-size: 12px;
  border-radius: 1px; outline: none; cursor: pointer;
}
select:focus { border-color: var(--accent); }
select option { background: var(--bg3); }

/* ── Start / Next buttons ── */
.btn-group-row { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-top: 4px; }
.btn-action {
  border: none; padding: 11px 10px;
  font-family: 'IBM Plex Mono', monospace; font-size: 12px;
  letter-spacing: 0.06em; font-weight: 500;
  border-radius: 1px; cursor: pointer; transition: all 0.15s; white-space: nowrap;
}
.btn-start { background: var(--accent); color: #0d0f0e; }
.btn-start:hover { background: #c9f060; }
.btn-next { background: transparent; color: var(--text2); border: 1px solid var(--border); }
.btn-next:hover:not(:disabled) { border-color: var(--accent); color: var(--accent); }
.btn-next:disabled { opacity: 0.35; cursor: not-allowed; }

/* ── Lost puzzles button ── */
.btn-lost {
  width: 100%; margin-top: 8px;
  background: transparent; border: 1px solid var(--border);
  color: var(--text2); padding: 10px 14px;
  font-family: 'IBM Plex Mono', monospace; font-size: 12px;
  letter-spacing: 0.05em; border-radius: 1px;
  cursor: pointer; transition: all 0.15s;
  display: flex; align-items: center; justify-content: space-between; gap: 8px;
}
.btn-lost:hover:not(:disabled) { border-color: var(--danger); color: var(--danger); }
.btn-lost:disabled { opacity: 0.3; cursor: not-allowed; }
.btn-lost.has-items { border-color: #e5505066; color: var(--text); }
.btn-lost.has-items:hover { border-color: var(--danger); color: var(--danger); background: #e5505010; }
.lost-icon { color: var(--danger); }
.lost-count {
  background: var(--danger); color: #fff;
  font-size: 10px; font-weight: 700;
  padding: 1px 7px; border-radius: 10px;
  min-width: 20px; text-align: center;
}
.btn-lost:disabled .lost-count { background: var(--text3); }

/* ── Lost retry badge ── */
.lost-retry-badge {
  background: #e5505015; border: 1px solid #e5505044;
  color: var(--danger); padding: 6px 12px;
  font-family: 'IBM Plex Mono', monospace; font-size: 11px;
  border-radius: 1px; text-align: center;
}

/* ── Toggle switches ── */
.setting-row { padding-top: 10px; border-top: 1px solid var(--border); }
.toggle-label {
  display: flex; align-items: center; gap: 10px;
  font-family: 'IBM Plex Mono', monospace; font-size: 11px;
  color: var(--text2); cursor: pointer; user-select: none;
}
.toggle-label input { display: none; }
.toggle-track {
  width: 34px; height: 18px; background: var(--bg3);
  border: 1px solid var(--border); border-radius: 10px;
  position: relative; transition: background 0.2s; flex-shrink: 0;
}
.toggle-thumb {
  position: absolute; top: 2px; left: 2px;
  width: 12px; height: 12px; background: var(--text3);
  border-radius: 50%; transition: all 0.2s;
}
.toggle-label input:checked ~ .toggle-track { background: #2a4010; border-color: var(--accent2); }
.toggle-label input:checked ~ .toggle-track .toggle-thumb { left: 18px; background: var(--accent); }

/* ── Info panel ── */
.info-row {
  display: flex; justify-content: space-between; align-items: center;
  font-family: 'IBM Plex Mono', monospace; font-size: 11px;
  padding: 7px 0; border-bottom: 1px solid var(--border);
}
.info-row:last-child { border-bottom: none; }
.info-key { color: var(--text3); text-transform: uppercase; letter-spacing: 0.08em; }
.info-val { color: var(--text); }
.info-val.rating-chip {
  background: var(--bg3); padding: 2px 10px;
  border-radius: 1px; border: 1px solid var(--border);
}
.theme-chip {
  display: inline-block; background: #b5e55015;
  border: 1px solid #b5e55033; color: var(--accent);
  padding: 2px 8px; border-radius: 1px;
  font-family: 'IBM Plex Mono', monospace; font-size: 10px;
  margin: 2px; text-transform: lowercase;
}

/* ── Board ── */
.board-wrap {
  border: 2px solid var(--border); border-radius: 2px;
  overflow: hidden; box-shadow: 0 0 60px #00000066;
  width: 100%; max-width: 560px; touch-action: none;
}
#board { width: 100%; }
.square-selected         { background: rgba(181,229,80,0.50) !important; }
.square-legal            { background: rgba(181,229,80,0.22) !important; }
.square-legal-capture    { background: rgba(229,80,80,0.28) !important; }
.highlight-from          { background: rgba(181,229,80,0.40) !important; }
.highlight-to            { background: rgba(181,229,80,0.50) !important; }

/* ── Puzzle status / tries ── */
.puzzle-status {
  text-align: center; font-family: 'Playfair Display', serif;
  font-size: 17px; font-weight: 700; min-height: 26px; padding: 0 12px;
}
.puzzle-status.correct { color: var(--accent); }
.puzzle-status.wrong   { color: var(--danger); }
.puzzle-status.neutral { color: var(--text2); }
.tries-row { display: flex; gap: 10px; justify-content: center; }
.try-dot {
  width: 12px; height: 12px; border-radius: 50%;
  border: 2px solid var(--border); background: transparent; transition: all 0.25s;
}
.try-dot.used-correct { background: var(--accent); border-color: var(--accent); }
.try-dot.used-wrong   { background: var(--danger);  border-color: var(--danger); }
.turn-indicator {
  display: flex; align-items: center; gap: 8px;
  font-family: 'IBM Plex Mono', monospace; font-size: 11px; color: var(--text2);
  padding: 8px 14px; background: var(--bg3); border: 1px solid var(--border);
  border-radius: 1px; width: 100%; max-width: 560px;
}
.turn-dot { width: 10px; height: 10px; border-radius: 50%; border: 1px solid #666; }
.turn-dot.white-turn { background: #eee; border-color: #ccc; }
.turn-dot.black-turn { background: #333; border-color: #555; }

/* ── Elo result flash ── */
.elo-result {
  font-family: 'IBM Plex Mono', monospace; font-size: 13px;
  padding: 8px 20px; border-radius: 1px; text-align: center;
  animation: fadeInUp 0.3s ease;
}
.elo-result.gain { color: var(--accent); background: #b5e55015; border: 1px solid #b5e55030; }
.elo-result.loss { color: var(--danger);  background: #e5505015; border: 1px solid #e5505030; }
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── Solution panel ── */
.moves-list {
  font-family: 'IBM Plex Mono', monospace; font-size: 12px;
  color: var(--text2); line-height: 2.1;
}
.move-num { color: var(--text3); font-size: 10px; min-width: 52px; display: inline-block; }
.move-played   { color: var(--accent); }
.move-solution { color: var(--warn); }
.move-hidden   { color: var(--text3); }
.btn-solve {
  background: transparent; border: 1px solid var(--warn); color: var(--warn);
  padding: 10px 20px; font-family: 'IBM Plex Mono', monospace;
  font-size: 11px; letter-spacing: 0.08em; border-radius: 1px;
  cursor: pointer; width: 100%; transition: all 0.15s; margin-top: 10px;
}
.btn-solve:hover { background: #e5a55015; }
.no-puzzle-msg {
  text-align: center; padding: 28px 10px; color: var(--text3);
  font-family: 'IBM Plex Mono', monospace; font-size: 12px; line-height: 2;
}

/* ── Loading overlay ── */
.loading-overlay {
  position: fixed; inset: 0; background: #0d0f0ecc;
  display: none; flex-direction: column;
  align-items: center; justify-content: center; z-index: 9999;
}
.spinner {
  width: 40px; height: 40px; border: 3px solid var(--border);
  border-top-color: var(--accent); border-radius: 50%;
  animation: spin 0.8s linear infinite; margin-bottom: 16px;
}
@keyframes spin { to { transform: rotate(360deg); } }
.loading-text {
  font-family: 'IBM Plex Mono', monospace; font-size: 12px;
  color: var(--text2); letter-spacing: 0.1em;
}

/* ── Responsive ── */
@media (max-width: 1100px) {
  .puzzle-layout { grid-template-columns: 240px 1fr; }
  .puzzle-sidebar-right { display: none; }
}
@media (max-width: 720px) {
  .puzzle-layout { grid-template-columns: 1fr; padding: 10px; gap: 12px; }
  .puzzle-sidebar-left { order: 2; }
  .puzzle-center { order: 1; }
  .main-title { font-size: 34px; }
  .tool-grid { grid-template-columns: 1fr; }
  .auth-card { width: 92vw; padding: 28px 20px; }
  .topbar { padding: 10px 14px; }
  .topbar-logo { font-size: 15px; }
  .lb-content { padding: 20px 12px; }
  .lb-table th:nth-child(5), .lb-table td:nth-child(5),
  .lb-table th:nth-child(6), .lb-table td:nth-child(6) { display: none; }
}

/* ── CHAT PANEL ── */
.chat-panel {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 18px;
}

.chat-messages {
  height: 280px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 6px;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}

.chat-messages::-webkit-scrollbar { width: 4px; }
.chat-messages::-webkit-scrollbar-track { background: transparent; }
.chat-messages::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

.chat-msg {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  line-height: 1.5;
  word-break: break-word;
}

.chat-msg-user {
  color: #7ab8f5;
  font-weight: 500;
  margin-right: 6px;
}

.chat-msg-text { color: var(--text2); }

/* System messages (solve/fail broadcasts) */
.chat-msg-system {
  background: #1a1e19;
  border-left: 2px solid var(--border);
  padding: 4px 8px;
  border-radius: 1px;
}

.chat-msg-system .chat-msg-user { color: var(--text3); font-size: 10px; }

.chat-puzzle-link {
  font-weight: 700;
  cursor: pointer;
  text-decoration: underline;
  text-underline-offset: 2px;
  font-family: 'IBM Plex Mono', monospace;
}

.chat-puzzle-link.solved { color: var(--accent); }
.chat-puzzle-link.failed { color: var(--danger); }
.chat-puzzle-link:hover  { opacity: 0.8; }

.chat-time {
  color: var(--text3);
  font-size: 9px;
  margin-left: 6px;
}

.chat-input-row {
  display: flex;
  gap: 6px;
}

.chat-input {
  flex: 1;
  background: var(--bg3);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 8px 10px;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12px;
  border-radius: 1px;
  outline: none;
  min-width: 0;
}

.chat-input:focus { border-color: var(--accent); }

.chat-send-btn {
  background: var(--accent);
  color: #0d0f0e;
  border: none;
  padding: 8px 12px;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 14px;
  font-weight: 700;
  border-radius: 1px;
  cursor: pointer;
  transition: background 0.15s;
  flex-shrink: 0;
}

.chat-send-btn:hover { background: #c9f060; }

/* Single chat panel — desktop right sidebar only */

/* ── Color filter buttons ── */
.color-btn-row {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 6px;
}

.color-btn {
  background: var(--bg3);
  border: 1px solid var(--border);
  color: var(--text2);
  padding: 8px 6px;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  border-radius: 1px;
  cursor: pointer;
  transition: all 0.15s;
  text-align: center;
}

.color-btn:hover { border-color: var(--accent); color: var(--text); }
.color-btn.active {
  background: #b5e55022;
  border-color: var(--accent);
  color: var(--accent);
  font-weight: 500;
}

/* ── HISTORY PAGE ── */
.history-content {
  flex: 1;
  padding: 28px 32px;
  max-width: 1100px;
  margin: 0 auto;
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.history-section-title {
  font-family: 'Playfair Display', serif;
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.hist-count-badge {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  background: var(--bg3);
  border: 1px solid var(--border);
  color: var(--text2);
  padding: 2px 10px;
  border-radius: 10px;
}

.chart-wrap {
  position: relative;
  height: 220px;
  padding: 16px;
}

.hist-pagination {
  display: flex;
  gap: 6px;
  justify-content: center;
  padding: 14px 0 4px;
  flex-wrap: wrap;
}

.hist-page-btn {
  background: var(--bg3);
  border: 1px solid var(--border);
  color: var(--text2);
  padding: 5px 12px;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  border-radius: 1px;
  cursor: pointer;
  transition: all 0.15s;
}

.hist-page-btn:hover  { border-color: var(--accent); color: var(--accent); }
.hist-page-btn.active { background: #b5e55022; border-color: var(--accent); color: var(--accent); }

.result-full    { color: var(--accent); font-weight: 500; }
.result-partial { color: var(--warn);   font-weight: 500; }
.result-pending { color: var(--danger); }
.result-solved  { color: var(--accent); }

.puzzle-link-cell {
  color: var(--accent);
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12px;
  cursor: pointer;
  text-decoration: underline;
  text-underline-offset: 2px;
}
.puzzle-link-cell:hover { opacity: 0.75; }

@media (max-width: 720px) {
  .history-content { padding: 14px 10px; }
  .lb-table th:nth-child(5),
  .lb-table td:nth-child(5) { display: none; }
}

/* ── ACHIEVEMENTS PAGE ── */
.ach-content {
  flex: 1;
  padding: 28px 32px;
  max-width: 1100px;
  margin: 0 auto;
  width: 100%;
}

.ach-section-label {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text3);
  margin-bottom: 14px;
}

.ach-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 12px;
}

.ach-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 2px;
  padding: 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  text-align: center;
  transition: all 0.2s;
  position: relative;
}

.ach-card.earned {
  border-color: #b5e55044;
  background: linear-gradient(135deg, var(--bg2), #1a2610);
  cursor: pointer;
}

.ach-card.earned:hover {
  border-color: var(--accent);
  box-shadow: 0 4px 20px #b5e55022;
  transform: translateY(-2px);
}

.ach-card.locked {
  opacity: 0.45;
  filter: grayscale(0.5);
}

.ach-card.active-badge {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px #b5e55044;
}

.ach-icon {
  font-size: 32px;
  line-height: 1;
}

.ach-name {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  font-weight: 500;
  color: var(--text);
  letter-spacing: 0.03em;
}

.ach-desc {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 10px;
  color: var(--text3);
  line-height: 1.5;
}

.ach-date {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 9px;
  color: var(--accent);
  margin-top: 2px;
}

.ach-badge-label {
  position: absolute;
  top: 6px;
  right: 6px;
  font-size: 9px;
  font-family: 'IBM Plex Mono', monospace;
  background: var(--accent);
  color: #0d0f0e;
  padding: 1px 5px;
  border-radius: 1px;
}

.ach-loading {
  color: var(--text3);
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12px;
  padding: 24px;
}

/* ── ACHIEVEMENT POPUP TOAST ── */
#ach-toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 99999;
  display: flex;
  flex-direction: column;
  gap: 10px;
  pointer-events: none;
}

.ach-toast {
  background: var(--bg2);
  border: 1px solid var(--accent);
  border-left: 4px solid var(--accent);
  border-radius: 2px;
  padding: 12px 16px;
  display: flex;
  align-items: center;
  gap: 12px;
  box-shadow: 0 4px 24px #00000088;
  animation: toastIn 0.35s ease;
  min-width: 280px;
  max-width: 360px;
  pointer-events: all;
}

.ach-toast-icon { font-size: 28px; flex-shrink: 0; }

.ach-toast-body { flex: 1; }

.ach-toast-title {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 9px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 3px;
}

.ach-toast-name {
  font-family: 'Playfair Display', serif;
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
}

.ach-toast-desc {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 10px;
  color: var(--text2);
  margin-top: 2px;
}

@keyframes toastIn {
  from { opacity: 0; transform: translateX(40px); }
  to   { opacity: 1; transform: translateX(0); }
}

@keyframes toastOut {
  from { opacity: 1; transform: translateX(0); }
  to   { opacity: 0; transform: translateX(40px); }
}

@media (max-width: 720px) {
  .ach-grid { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); }
  #ach-toast-container { bottom: 12px; right: 12px; left: 12px; }
  .ach-toast { min-width: 0; }
}

/* ── PROFILE PAGE ── */
.profile-content {
  flex: 1;
  padding: 24px 32px;
  max-width: 900px;
  margin: 0 auto;
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.profile-header {
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
}

.profile-avatar {
  font-size: 52px;
  width: 80px;
  height: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg3);
  border: 2px solid var(--border);
  border-radius: 2px;
  flex-shrink: 0;
}

.profile-info { flex: 1; min-width: 160px; }

.profile-username {
  font-family: 'Playfair Display', serif;
  font-size: 26px;
  font-weight: 900;
  color: var(--text);
  margin-bottom: 4px;
}

.profile-meta {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  color: var(--text3);
  margin-bottom: 4px;
}

.profile-rank {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12px;
  color: var(--accent);
}

.profile-stats-row {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  align-items: flex-start;
}

.profile-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 2px;
  padding: 10px 16px;
  min-width: 80px;
}

.profile-stat-value {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 18px;
  font-weight: 500;
  color: var(--text);
}

.profile-stat-label {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 9px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text3);
  margin-top: 2px;
}

.profile-badge-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.profile-badge-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 10px 14px;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 2px;
  cursor: pointer;
  transition: all 0.15s;
  min-width: 70px;
  text-align: center;
}

.profile-badge-item:hover { border-color: var(--accent); }
.profile-badge-item.active {
  border-color: var(--accent);
  background: #b5e55015;
  box-shadow: 0 0 0 2px #b5e55033;
}

.profile-badge-emoji { font-size: 26px; }

.profile-badge-name {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 9px;
  color: var(--text3);
  max-width: 80px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.profile-color-stats {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.color-stat-block {
  flex: 1;
  min-width: 160px;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 2px;
  padding: 14px;
}

.color-stat-title {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  color: var(--text2);
  margin-bottom: 8px;
}

.color-stat-bar {
  height: 8px;
  background: var(--border);
  border-radius: 4px;
  overflow: hidden;
  margin-bottom: 6px;
}

.color-stat-fill {
  height: 100%;
  border-radius: 4px;
  transition: width 0.5s ease;
}

.color-stat-fill.white { background: #eee; }
.color-stat-fill.black { background: var(--accent); }

.color-stat-count {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12px;
  color: var(--text);
}

/* username badge hover hint */
.user-badge:hover { text-decoration: underline; text-underline-offset: 2px; }

/* achievement chat message */
.chat-msg-achievement {
  background: #2a200a;
  border-left: 2px solid #e5c050;
  padding: 4px 8px;
  border-radius: 1px;
}
.chat-msg-achievement .chat-msg-user { color: #e5c050; }

@media (max-width: 720px) {
  .profile-content { padding: 14px 10px; }
  .profile-stats-row { gap: 8px; }
  .profile-stat { padding: 8px 10px; min-width: 65px; }
}

/* ══════════════════════════════════════
   PUZZLE BATTLE
══════════════════════════════════════ */

/* ── Lobby ── */
.battle-lobby-content {
  flex: 1;
  padding: 28px 32px;
  max-width: 900px;
  margin: 0 auto;
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.battle-lobby-header { text-align: center; }

.battle-room-list { padding: 18px; }

.battle-room-entry {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}
.battle-room-entry:last-child { border-bottom: none; }

.battle-room-meta {
  flex: 1;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12px;
  color: var(--text2);
  min-width: 200px;
}

.battle-room-meta strong { color: var(--text); }

.battle-room-status {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 10px;
  padding: 2px 8px;
  border-radius: 10px;
  border: 1px solid;
}
.battle-room-status.waiting     { color: var(--accent); border-color: var(--accent); }
.battle-room-status.in_progress { color: var(--warn);   border-color: var(--warn);   }
.battle-room-status.finished    { color: var(--text3);  border-color: var(--border);  }

/* ── Create Room Modal ── */
.battle-modal-overlay {
  position: fixed;
  inset: 0;
  background: #00000088;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
}

.battle-modal {
  background: var(--bg2);
  border: 1px solid var(--border);
  padding: 28px;
  width: 100%;
  max-width: 400px;
  border-radius: 2px;
}

.battle-modal-title {
  font-family: 'Playfair Display', serif;
  font-size: 20px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 20px;
}

/* ── Battle Room Layout ── */
.battle-room-layout {
  flex: 1;
  display: flex;
  gap: 20px;
  padding: 16px 20px;
  overflow: hidden;
}

.battle-room-left {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  flex: 1;
  min-width: 0;
}

.battle-room-right {
  width: 260px;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
  overflow-y: auto;
}

.battle-info-bar {
  display: flex;
  align-items: center;
  gap: 14px;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  color: var(--text2);
  width: 100%;
}

.battle-room-id { color: var(--text3); }

.battle-puzzle-counter { color: var(--accent); font-weight: 500; }

.battle-status-badge {
  padding: 2px 10px;
  border-radius: 10px;
  border: 1px solid var(--border);
  font-size: 10px;
  color: var(--text3);
}
.battle-status-badge.waiting     { color: var(--text3); }
.battle-status-badge.in_progress { color: var(--accent); border-color: var(--accent); }
.battle-status-badge.finished    { color: var(--warn);   border-color: var(--warn); }

/* ── Battle Timer ── */
.battle-timer {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 13px;
  color: var(--text2);
  text-align: center;
  padding: 6px 0;
}

.battle-timer-val {
  font-size: 22px;
  font-weight: 700;
  color: var(--accent);
  transition: color 0.3s;
}
.battle-timer-val.urgent { color: var(--danger); }

/* ── Players list ── */
.battle-player-row {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 0;
  border-bottom: 1px solid var(--border);
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12px;
}
.battle-player-row:last-child { border-bottom: none; }

.battle-player-name  { flex: 1; color: var(--text); }
.battle-player-score { color: var(--accent); font-weight: 500; min-width: 40px; text-align: right; }
.battle-player-ready { font-size: 14px; }

.battle-spectator-label {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 10px;
  color: var(--text3);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 4px;
}

/* ── Solve flash ── */
@keyframes solveFlash {
  0%   { background: #b5e55033; }
  100% { background: transparent; }
}
.battle-solve-flash { animation: solveFlash 0.8s ease; }

/* ── Final scoreboard ── */
.battle-final-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  font-family: 'IBM Plex Mono', monospace;
}
.battle-final-row:last-child { border-bottom: none; }
.battle-final-rank  { font-size: 18px; width: 28px; }
.battle-final-name  { flex: 1; color: var(--text); font-size: 13px; }
.battle-final-score { color: var(--accent); font-weight: 700; font-size: 15px; }

/* ── Guest disabled card ── */
.tool-card.guest-disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

@media (max-width: 900px) {
  .battle-room-layout { flex-direction: column; padding: 10px; }
  .battle-room-right  { width: 100%; }
}

/* ── BATTLE BALLOONS ── */
#battle-balloon-container {
  position: fixed;
  top: 80px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 99998;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  pointer-events: none;
  width: 100%;
  max-width: 500px;
}

.battle-balloon {
  padding: 14px 28px;
  border-radius: 40px;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 14px;
  font-weight: 600;
  text-align: center;
  animation: balloonIn 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  box-shadow: 0 8px 32px #00000066;
  max-width: 90vw;
}

.battle-balloon.solve {
  background: #1a2e1a;
  border: 2px solid var(--accent);
  color: var(--accent);
}

.battle-balloon.round {
  background: #2a2000;
  border: 2px solid #e5c050;
  color: #e5c050;
  font-size: 16px;
}

.battle-balloon.match {
  background: linear-gradient(135deg, #1a0a2e, #2a1a0e);
  border: 2px solid #c084fc;
  color: #e2c0ff;
  font-size: 18px;
  padding: 20px 40px;
  animation: balloonMatch 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

@keyframes balloonIn {
  from { opacity: 0; transform: scale(0.5) translateY(-20px); }
  to   { opacity: 1; transform: scale(1)   translateY(0); }
}

@keyframes balloonMatch {
  0%   { opacity: 0; transform: scale(0.3) rotate(-5deg); }
  60%  { transform: scale(1.1) rotate(2deg); }
  100% { opacity: 1; transform: scale(1) rotate(0deg); }
}

@keyframes balloonOut {
  from { opacity: 1; transform: scale(1); }
  to   { opacity: 0; transform: scale(0.8) translateY(-10px); }
}

/* ── TRAINING PAGE ── */
.training-stats-row {
  display: flex;
  gap: 12px;
  margin-top: 10px;
}

.training-stat {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 2px;
  padding: 10px 8px;
}

.training-stat-val {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 20px;
  font-weight: 600;
  color: var(--accent);
}

.training-stat-label {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 9px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text3);
  margin-top: 2px;
}

/* tool-grid 3-column on wider screens */
@media (min-width: 900px) {
  .tool-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ── TRAINING PAGE ── */
.training-stats-row {
  display: flex;
  gap: 12px;
}

.training-stat {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 2px;
  padding: 10px 8px;
}

.training-stat-val {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 20px;
  font-weight: 600;
  color: var(--accent);
}

.training-stat-label {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 9px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text3);
  margin-top: 2px;
}

/* ── TRAINING PAGE ── */
.training-stats-row {
  display: flex;
  gap: 12px;
  margin-bottom: 4px;
}

.training-stat {
  flex: 1;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 2px;
  padding: 10px;
  text-align: center;
}

.training-stat-val {
  display: block;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 22px;
  font-weight: 600;
  color: var(--accent);
}

.training-stat-label {
  display: block;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 9px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text3);
  margin-top: 2px;
}

/* ── Battle source radio buttons ── */
.battle-source-row {
  display: flex;
  gap: 16px;
  margin-top: 4px;
}

.battle-radio-label {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12px;
  color: var(--text2);
  padding: 8px 14px;
  border: 1px solid var(--border);
  border-radius: 2px;
  transition: border-color 0.15s, color 0.15s;
}

.battle-radio-label:has(input:checked) {
  border-color: var(--accent);
  color: var(--accent);
}

.battle-radio-label input[type="radio"] {
  accent-color: var(--accent);
}

.field-group.disabled label {
  color: var(--text3);
}

.field-group.disabled input {
  opacity: 0.35;
  pointer-events: none;
}

/* ═══════════════════════════════════════════════
   ARENA
   ═══════════════════════════════════════════════ */

.arena-clock {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 28px;
  font-weight: 500;
  background: var(--surface2);
  border: 1px solid var(--border);
  padding: 8px 20px;
  border-radius: 8px;
  color: var(--text2);
  letter-spacing: 2px;
  transition: background 0.2s, color 0.2s, border-color 0.2s;
  min-width: 110px;
  text-align: center;
}

.arena-clock.clock-active {
  background: var(--surface2);
  border-color: var(--accent);
  color: var(--text);
}

.arena-clock.clock-low {
  border-color: var(--danger);
  color: var(--danger);
  animation: clock-pulse 1s infinite;
}

@keyframes clock-pulse {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.55; }
}

.arena-hl-from { background-color: rgba(181, 229, 80, 0.35) !important; }
.arena-hl-to   { background-color: rgba(181, 229, 80, 0.55) !important; }