/* ── Candio · Persuasion Battle ─────────────────────────────────────────── */

:root {
  --ink: #e9e5dc;
  --ink-soft: #b8b2a4;
  --ink-muted: #6e695e;
  --paper: #0e0d0c;
  --paper-raised: #1a1917;
  --paper-panel: #161514;
  --paper-card: #1e1d1b;
  --line: rgba(233, 229, 220, 0.11);
  --line-strong: rgba(233, 229, 220, 0.22);
  --accent: #c4a574;
  --accent-dim: rgba(196, 165, 116, 0.15);
  --accent-glow: rgba(196, 165, 116, 0.35);
  --ready: #7a9e6a;
  --error: #c47070;
  --ai-color: #7b8cde;
  --ai-dim: rgba(123, 140, 222, 0.15);
  --ai-glow: rgba(123, 140, 222, 0.35);
  --human-color: var(--accent);
  --warning: #d4a843;
  --danger: #c45050;

  --font-display: 'Cormorant Garamond', 'Georgia', serif;
  --font-body: 'Source Serif 4', 'Georgia', serif;
  --font-ui: 'IBM Plex Mono', 'Consolas', monospace;

  --ease-organic: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-drift: cubic-bezier(0.45, 0.05, 0.55, 0.95);
  --ease-settle: cubic-bezier(0.33, 0.86, 0.45, 1);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--paper);
  color: var(--ink-soft);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  line-height: 1.65;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--line-strong); border-radius: 3px; }

.grain {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 9999;
  opacity: 0.03;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-size: 180px;
}

/* ── Loading Overlay ─────────────────────────────────────────────────── */
.battle-loading {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  width: 100%;
}

.loading-spinner {
  width: 32px;
  height: 32px;
  border: 2px solid var(--line);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* ── Header ──────────────────────────────────────────────────────────── */
.battle-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 36px 16px 40px;
  border-bottom: 1px solid var(--line);
  animation: drift-in 0.9s var(--ease-organic) both;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  text-decoration: none;
  color: inherit;
}

.brand svg { width: 36px; height: 36px; flex-shrink: 0; }

.brand-text .brand-name {
  display: block;
  font-family: var(--font-display);
  font-size: 1.45rem;
  font-weight: 500;
  color: var(--ink);
  letter-spacing: 0.01em;
  line-height: 1.1;
}

.brand-tag {
  font-family: var(--font-ui);
  font-size: 0.55rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-muted);
}

.header-nav {
  display: flex;
  align-items: center;
  gap: 16px;
}

.header-nav a {
  font-family: var(--font-ui);
  font-size: 0.6rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-muted);
  text-decoration: none;
  transition: color 0.3s;
}

.header-nav a:hover { color: var(--ink); }

/* ── State Container ─────────────────────────────────────────────────── */
.battle-container {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 40px 24px;
  min-height: calc(100vh - 80px);
}

.state { display: none; width: 100%; max-width: 900px; }
.state.active { display: block; animation: drift-in 0.7s var(--ease-organic) both; }

/* ── LOBBY ────────────────────────────────────────────────────────────── */
.lobby-header {
  text-align: center;
  margin-bottom: 48px;
}

.lobby-badge {
  display: inline-block;
  font-family: var(--font-ui);
  font-size: 0.55rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  border: 1px solid var(--accent-dim);
  padding: 6px 18px;
  margin-bottom: 20px;
}

.lobby-title {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 5vw, 3.8rem);
  font-weight: 500;
  color: var(--ink);
  line-height: 1.1;
  margin-bottom: 14px;
}

.lobby-title .vs-text {
  background: linear-gradient(135deg, var(--accent) 0%, var(--ai-color) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.lobby-subtitle {
  font-size: 1rem;
  color: var(--ink-muted);
  max-width: 520px;
  margin: 0 auto 36px;
  line-height: 1.7;
}

/* Scoring preview */
.scoring-preview {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  margin-bottom: 48px;
}

.scoring-chip {
  font-family: var(--font-ui);
  font-size: 0.5rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-muted);
  background: var(--paper-panel);
  border: 1px solid var(--line);
  padding: 6px 14px;
  border-radius: 4px;
  transition: border-color 0.3s, color 0.3s;
}

.scoring-chip:hover {
  border-color: var(--accent-dim);
  color: var(--ink-soft);
}

/* Topic cards */
.topics-label {
  font-family: var(--font-ui);
  font-size: 0.55rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-muted);
  text-align: center;
  margin-bottom: 20px;
}

.topics-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  max-width: 640px;
  margin: 0 auto;
}

.topic-card {
  background: var(--paper-panel);
  border: 1px solid var(--line);
  padding: 22px 28px;
  cursor: pointer;
  transition: border-color 0.4s, transform 0.4s var(--ease-organic), box-shadow 0.4s, background 0.3s;
  border-radius: 8px;
  position: relative;
  overflow: hidden;
}

.topic-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--accent-dim) 0%, transparent 60%);
  opacity: 0;
  transition: opacity 0.4s;
}

.topic-card:hover {
  border-color: var(--accent);
  transform: translateY(-3px) scale(1.01);
  box-shadow: 0 12px 36px rgba(0,0,0,0.3), 0 0 0 1px var(--accent-dim);
}

.topic-card:hover::before { opacity: 1; }

.topic-card-text {
  position: relative;
  z-index: 1;
  font-family: var(--font-body);
  font-size: 1.05rem;
  color: var(--ink);
  line-height: 1.55;
}

.topic-card-arrow {
  position: absolute;
  right: 24px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-ui);
  font-size: 1rem;
  color: var(--ink-muted);
  transition: transform 0.3s var(--ease-organic), color 0.3s;
  z-index: 1;
}

.topic-card:hover .topic-card-arrow {
  transform: translateY(-50%) translateX(4px);
  color: var(--accent);
}

.topics-refresh {
  display: block;
  margin: 20px auto 0;
  font-family: var(--font-ui);
  font-size: 0.55rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-muted);
  background: none;
  border: 1px solid var(--line);
  padding: 8px 20px;
  cursor: pointer;
  border-radius: 4px;
  transition: color 0.3s, border-color 0.3s;
}

.topics-refresh:hover {
  color: var(--ink);
  border-color: var(--line-strong);
}

/* ── CUSTOM PROMPT ─────────────────────────────────────────────────────── */
.custom-prompt {
  max-width: 640px;
  margin: 28px auto 0;
  text-align: center;
}

.custom-prompt-label {
  font-family: var(--font-ui);
  font-size: 0.5rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-muted);
  margin-bottom: 14px;
}

.custom-prompt-row {
  display: flex;
  gap: 10px;
  align-items: stretch;
}

.custom-prompt-input {
  flex: 1;
  background: var(--paper-panel);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 14px 16px;
  font-family: var(--font-body);
  font-size: 1rem;
  color: var(--ink);
  transition: border-color 0.3s, box-shadow 0.3s;
}

.custom-prompt-input::placeholder {
  color: var(--ink-faint);
}

.custom-prompt-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent-dim);
}

.custom-prompt-btn {
  flex: 0 0 auto;
  font-family: var(--font-ui);
  font-size: 0.55rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #0e0d0c;
  background: var(--accent);
  border: none;
  border-radius: 6px;
  padding: 0 22px;
  cursor: pointer;
  transition: opacity 0.3s;
}

.custom-prompt-btn:hover {
  opacity: 0.85;
}

.custom-prompt-hint {
  font-family: var(--font-ui);
  font-size: 0.5rem;
  letter-spacing: 0.1em;
  color: var(--ink-faint);
  margin-top: 8px;
}

@media (max-width: 560px) {
  .custom-prompt-row {
    flex-direction: column;
  }
  .custom-prompt-btn {
    padding: 12px 22px;
  }
}

/* ── COUNTDOWN ───────────────────────────────────────────────────────── */
.countdown-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
}

.countdown-topic {
  font-family: var(--font-ui);
  font-size: 0.55rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 24px;
  text-align: center;
  max-width: 500px;
}

.countdown-number {
  font-family: var(--font-display);
  font-size: clamp(6rem, 20vw, 14rem);
  font-weight: 600;
  color: var(--ink);
  line-height: 1;
  animation: countdown-pulse 1s var(--ease-organic) both;
}

@keyframes countdown-pulse {
  0% { opacity: 0; transform: scale(1.4); }
  50% { opacity: 1; transform: scale(0.95); }
  100% { opacity: 1; transform: scale(1); }
}

.countdown-label {
  font-family: var(--font-ui);
  font-size: 0.6rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-muted);
  margin-top: 16px;
}

/* ── BATTLE (Writing Phase) ──────────────────────────────────────────── */
.battle-phase {
  max-width: 800px;
  margin: 0 auto;
  width: 100%;
}

.battle-topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
}

.battle-topic-display {
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--ink-soft);
  flex: 1;
  margin-right: 24px;
  line-height: 1.5;
}

.timer-group {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-shrink: 0;
}

.timer-ring {
  position: relative;
  width: 56px;
  height: 56px;
}

.timer-ring svg {
  width: 56px;
  height: 56px;
  transform: rotate(-90deg);
}

.timer-ring-bg {
  fill: none;
  stroke: var(--line);
  stroke-width: 3;
}

.timer-ring-progress {
  fill: none;
  stroke: var(--accent);
  stroke-width: 3;
  stroke-linecap: round;
  stroke-dasharray: 157;
  stroke-dashoffset: 0;
  transition: stroke-dashoffset 1s linear, stroke 0.5s;
}

.timer-ring-progress.warning { stroke: var(--warning); }
.timer-ring-progress.danger { stroke: var(--danger); }

.timer-text {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-ui);
  font-size: 0.65rem;
  font-weight: 500;
  color: var(--ink);
  letter-spacing: 0.05em;
}

.timer-text.warning { color: var(--warning); }
.timer-text.danger { color: var(--danger); }

.word-count-badge {
  font-family: var(--font-ui);
  font-size: 0.5rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-muted);
}

.word-count-badge strong { color: var(--ink-soft); }

.battle-textarea {
  width: 100%;
  min-height: 400px;
  background: var(--paper-panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 28px 32px;
  font-family: var(--font-body);
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--ink);
  resize: vertical;
  outline: none;
  transition: border-color 0.3s, box-shadow 0.3s;
}

.battle-textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-dim);
}

.battle-textarea::placeholder {
  color: var(--ink-muted);
  font-style: italic;
}

.battle-actions {
  display: flex;
  justify-content: flex-end;
  margin-top: 20px;
}

.battle-evidence {
  margin-top: 18px;
  padding: 18px 22px;
  background: var(--accent-dim);
  border: 1px solid var(--accent);
  border-radius: 8px;
}

.battle-evidence-label {
  font-family: var(--font-ui);
  font-size: 0.55rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 10px;
}

.battle-evidence-group + .battle-evidence-group {
  margin-top: 14px;
}

.battle-evidence-against .battle-evidence-label {
  color: #c97a7a;
}

.battle-evidence-neutral .battle-evidence-label {
  color: var(--ink-muted);
}

.battle-evidence-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.battle-evidence-list li {
  font-family: var(--font-body);
  font-size: 0.92rem;
  line-height: 1.6;
  color: var(--ink-soft);
  padding-left: 18px;
  position: relative;
}

.battle-evidence-list li::before {
  content: '▸';
  position: absolute;
  left: 0;
  color: var(--accent);
}

.btn-submit-early {
  font-family: var(--font-ui);
  font-size: 0.6rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--paper);
  background: var(--accent);
  border: 1px solid color-mix(in srgb, var(--accent) 80%, white);
  padding: 12px 28px;
  cursor: pointer;
  border-radius: 4px;
  transition: background 0.3s, transform 0.3s, box-shadow 0.3s;
}

.btn-submit-early:hover {
  background: color-mix(in srgb, var(--accent) 85%, white);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px var(--accent-glow);
}

/* ── JUDGING ─────────────────────────────────────────────────────────── */
.judging-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
  text-align: center;
}

.judging-spinner {
  width: 48px;
  height: 48px;
  border: 2px solid var(--line);
  border-top-color: var(--accent);
  border-right-color: var(--ai-color);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin-bottom: 24px;
}

.judging-text {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 500;
  color: var(--ink);
  margin-bottom: 10px;
}

.judging-sub {
  font-size: 0.9rem;
  color: var(--ink-muted);
}

/* ── RESULTS ─────────────────────────────────────────────────────────── */
.results-phase {
  max-width: 960px;
  margin: 0 auto;
  width: 100%;
}

/* Winner Banner */
.winner-banner {
  text-align: center;
  padding: 36px 24px;
  margin-bottom: 40px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--paper-panel);
  position: relative;
  overflow: hidden;
}

.winner-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  opacity: 0.08;
  pointer-events: none;
}

.winner-banner.human-won::before {
  background: linear-gradient(135deg, var(--accent) 0%, transparent 60%);
}

.winner-banner.ai-won::before {
  background: linear-gradient(135deg, var(--ai-color) 0%, transparent 60%);
}

.winner-banner.tie-result::before {
  background: linear-gradient(135deg, var(--accent) 0%, var(--ai-color) 100%);
}

.winner-crown {
  font-size: 2.4rem;
  margin-bottom: 8px;
}

.winner-title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 500;
  color: var(--ink);
  line-height: 1.15;
  margin-bottom: 8px;
}

.winner-totals {
  font-family: var(--font-ui);
  font-size: 0.6rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-muted);
}

.winner-totals .human-total { color: var(--accent); }
.winner-totals .ai-total { color: var(--ai-color); }

/* Score Bars */
.scores-section {
  margin-bottom: 40px;
}

.scores-title {
  font-family: var(--font-ui);
  font-size: 0.55rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-muted);
  margin-bottom: 20px;
  text-align: center;
}

.score-row {
  display: grid;
  grid-template-columns: 120px 1fr 40px 40px 1fr 120px;
  gap: 8px;
  align-items: center;
  margin-bottom: 14px;
  opacity: 0;
  animation: score-reveal 0.6s var(--ease-organic) both;
}

.score-row:nth-child(1) { animation-delay: 0.1s; }
.score-row:nth-child(2) { animation-delay: 0.2s; }
.score-row:nth-child(3) { animation-delay: 0.3s; }
.score-row:nth-child(4) { animation-delay: 0.4s; }
.score-row:nth-child(5) { animation-delay: 0.5s; }
.score-row:nth-child(6) { animation-delay: 0.6s; }

@keyframes score-reveal {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

.score-label-left {
  font-family: var(--font-ui);
  font-size: 0.5rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-soft);
  text-align: right;
}

.score-label-right {
  font-family: var(--font-ui);
  font-size: 0.5rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-soft);
  text-align: left;
}

.score-bar-container {
  height: 8px;
  background: var(--line);
  border-radius: 4px;
  overflow: hidden;
  position: relative;
}

.score-bar-container.human { direction: rtl; }

.score-bar-fill {
  height: 100%;
  border-radius: 4px;
  transition: width 1s var(--ease-organic);
  width: 0;
}

.score-bar-fill.human { background: var(--accent); }
.score-bar-fill.ai { background: var(--ai-color); }

.score-value {
  font-family: var(--font-ui);
  font-size: 0.65rem;
  font-weight: 500;
  text-align: center;
}

.score-value.human { color: var(--accent); }
.score-value.ai { color: var(--ai-color); }

.score-dimension {
  font-family: var(--font-ui);
  font-size: 0.48rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-muted);
  text-align: center;
  grid-column: 1 / -1;
  margin-top: -6px;
  margin-bottom: 4px;
}

/* Dimension note tooltip */
.dimension-note {
  grid-column: 1 / -1;
  font-size: 0.82rem;
  color: var(--ink-muted);
  text-align: center;
  line-height: 1.5;
  padding: 0 40px;
  margin-top: -4px;
  margin-bottom: 8px;
}

/* Side-by-side essays */
.essays-section {
  margin-bottom: 40px;
}

.essays-title {
  font-family: var(--font-ui);
  font-size: 0.55rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-muted);
  margin-bottom: 20px;
  text-align: center;
}

.essays-grid {
  display: grid;
  grid-template-columns: 1fr 48px 1fr;
  gap: 0;
  align-items: start;
}

.essay-column {
  background: var(--paper-panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 24px;
  animation: drift-in 0.8s var(--ease-organic) 0.7s both;
}

.essay-column.human-col { border-top: 2px solid var(--accent); }
.essay-column.ai-col { border-top: 2px solid var(--ai-color); }

.essay-col-label {
  font-family: var(--font-ui);
  font-size: 0.5rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.essay-col-label.human-label { color: var(--accent); }
.essay-col-label.ai-label { color: var(--ai-color); }

.essay-col-body {
  font-size: 0.9rem;
  color: var(--ink-soft);
  line-height: 1.75;
  white-space: pre-wrap;
  word-break: break-word;
}

.vs-divider {
  display: flex;
  align-items: center;
  justify-content: center;
}

.vs-badge {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 600;
  background: linear-gradient(135deg, var(--accent) 0%, var(--ai-color) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Judge Verdict */
.verdict-section {
  margin-bottom: 40px;
}

.verdict-card {
  background: var(--paper-panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 28px 32px;
  animation: drift-in 0.8s var(--ease-organic) 0.9s both;
}

.verdict-label {
  font-family: var(--font-ui);
  font-size: 0.55rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-muted);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.verdict-label::before {
  content: '⚖️';
  font-size: 1rem;
}

.verdict-body {
  font-size: 0.95rem;
  color: var(--ink-soft);
  line-height: 1.8;
}

.verdict-body p { margin-bottom: 12px; }
.verdict-body strong { color: var(--ink); }

/* Results Actions */
.results-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-top: 40px;
  padding-top: 32px;
  border-top: 1px solid var(--line);
}

.btn-play-again {
  font-family: var(--font-ui);
  font-size: 0.6rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--paper);
  background: var(--accent);
  border: 1px solid color-mix(in srgb, var(--accent) 80%, white);
  padding: 14px 32px;
  cursor: pointer;
  text-decoration: none;
  border-radius: 4px;
  transition: background 0.3s, transform 0.3s, box-shadow 0.3s;
}

.btn-play-again:hover {
  background: color-mix(in srgb, var(--accent) 85%, white);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px var(--accent-glow);
}

.btn-back-home {
  font-family: var(--font-ui);
  font-size: 0.6rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-soft);
  background: transparent;
  border: 1px solid var(--line-strong);
  padding: 14px 32px;
  cursor: pointer;
  text-decoration: none;
  border-radius: 4px;
  transition: border-color 0.3s, color 0.3s, transform 0.35s var(--ease-organic);
}

.btn-back-home:hover {
  border-color: var(--accent);
  color: var(--ink);
  transform: translateY(-1px);
}

/* ── Utility ─────────────────────────────────────────────────────────── */
.hidden { display: none !important; }

@keyframes drift-in {
  from { opacity: 0; transform: translateY(14px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── Responsive ──────────────────────────────────────────────────────── */
@media (max-width: 768px) {
  .battle-header { padding: 14px 20px; }
  .battle-container { padding: 24px 16px; }

  .score-row {
    grid-template-columns: 1fr;
    gap: 4px;
    text-align: center;
    padding: 12px 0;
    border-bottom: 1px solid var(--line);
  }

  .score-label-left,
  .score-label-right { text-align: center; }

  .score-bar-container.human { direction: ltr; }

  .essays-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .vs-divider { padding: 8px 0; }

  .battle-topbar { flex-direction: column; gap: 16px; }
  .battle-topic-display { margin-right: 0; text-align: center; }

  .results-actions { flex-direction: column; align-items: center; }
}

@media (max-width: 520px) {
  .lobby-title { font-size: 2rem; }
  .battle-textarea {
    min-height: min(300px, 50vh);
    padding: 20px;
    font-size: 16px;
  }
}