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

:root {
  --bg-deep: #0a0c10;
  --bg-surface: rgba(18, 22, 30, 0.72);
  --accent: #c9a84c;
  --accent-dim: rgba(201, 168, 76, 0.35);
  --text-primary: #e8e6e1;
  --text-secondary: rgba(232, 230, 225, 0.55);
  --border: rgba(201, 168, 76, 0.18);
  --error: #e05a5a;
  --radius: 10px;
}

html, body {
  height: 100%;
  font-family: 'Inter', system-ui, sans-serif;
  color: var(--text-primary);
  background: var(--bg-deep);
  overflow-x: hidden;
}

#bg-canvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

/* ── Topbar ── */
.topbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 2.5rem;
  height: 60px;
  background: var(--bg-surface);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}

.logo {
  font-family: 'Cinzel', serif;
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--accent);
  text-decoration: none;
  text-transform: lowercase;
}

.topbar-nav {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.auth-btn,
.user-btn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-primary);
  font-family: 'Inter', sans-serif;
  font-size: 0.85rem;
  font-weight: 400;
  padding: 0.45rem 1.1rem;
  border-radius: var(--radius);
  cursor: pointer;
  transition: border-color 0.25s, color 0.25s, background 0.25s;
  letter-spacing: 0.03em;
}

.auth-btn:hover,
.user-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(201, 168, 76, 0.06);
}

/* ── Hero ── */
.hero {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  text-align: center;
  padding: 6rem 2rem 4rem;
}

.hero-title {
  font-family: 'Cinzel', serif;
  font-size: clamp(2.4rem, 6vw, 4.2rem);
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--text-primary);
  margin-bottom: 1rem;
  text-shadow: 0 0 40px rgba(201, 168, 76, 0.15);
}

.hero-subtitle {
  font-size: clamp(0.95rem, 2.5vw, 1.2rem);
  font-weight: 300;
  color: var(--text-secondary);
  letter-spacing: 0.08em;
  max-width: 520px;
}

/* ── Games Section ── */
.games-section {
  position: relative;
  z-index: 1;
  padding: 3rem 2.5rem 5rem;
  max-width: 900px;
  margin: -6rem auto 0;
  animation: fadeUp 0.6s ease forwards;
}

.games-section.hidden {
  display: none;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}

.games-heading {
  font-family: 'Cinzel', serif;
  font-size: 1.1rem;
  font-weight: 400;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.8rem;
  text-align: center;
}

.games-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.2rem;
}

.game-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.6rem;
  padding: 2rem 1.5rem;
  background: var(--bg-surface);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color 0.3s;
}

.game-card.disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.game-card.playable {
  cursor: pointer;
  position: relative;
  transition: border-color 0.3s, transform 0.2s;
}

.game-card.playable:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.help-btn {
  position: absolute;
  top: 0.6rem;
  right: 0.6rem;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-secondary);
  font-size: 0.75rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color 0.2s, color 0.2s;
  z-index: 2;
}

.help-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.play-badge {
  color: var(--accent) !important;
  border-color: var(--accent-dim) !important;
}

.game-card-icon {
  font-size: 1.6rem;
  color: var(--accent-dim);
}

.game-card-name {
  font-size: 0.95rem;
  font-weight: 400;
  letter-spacing: 0.05em;
}

.game-card-badge {
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-secondary);
  border: 1px solid var(--border);
  padding: 0.2rem 0.7rem;
  border-radius: 20px;
}

/* ── Modal ── */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.55);
  backdrop-filter: blur(6px);
  animation: fadeIn 0.2s ease;
}

.modal-overlay.hidden {
  display: none;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

.modal {
  position: relative;
  width: 100%;
  max-width: 400px;
  padding: 2.2rem 2rem 2rem;
  background: rgba(14, 17, 24, 0.92);
  border: 1px solid var(--border);
  border-radius: 14px;
  backdrop-filter: blur(20px);
  animation: slideUp 0.25s ease;
}

.modal-sm {
  max-width: 340px;
  text-align: center;
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

.modal-close {
  position: absolute;
  top: 0.8rem;
  right: 1rem;
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 1.4rem;
  cursor: pointer;
  line-height: 1;
  transition: color 0.2s;
}

.modal-close:hover {
  color: var(--text-primary);
}

.modal-tabs {
  display: flex;
  gap: 0;
  margin-bottom: 1.8rem;
  border-bottom: 1px solid var(--border);
}

.tab {
  flex: 1;
  background: none;
  border: none;
  color: var(--text-secondary);
  font-family: 'Inter', sans-serif;
  font-size: 0.9rem;
  padding: 0.7rem 0;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: color 0.2s, border-color 0.2s;
  letter-spacing: 0.04em;
}

.tab.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

.tab:hover:not(.active) {
  color: var(--text-primary);
}

/* ── Form ── */
.auth-form.hidden {
  display: none;
}

.field {
  margin-bottom: 1.3rem;
}

.field label {
  display: block;
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: 0.45rem;
}

.field input {
  width: 100%;
  padding: 0.65rem 0.9rem;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-primary);
  font-family: 'Inter', sans-serif;
  font-size: 0.9rem;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.field input:focus {
  border-color: var(--accent-dim);
  box-shadow: 0 0 0 3px rgba(201, 168, 76, 0.08);
}

.field input.invalid {
  border-color: var(--error);
  box-shadow: 0 0 0 3px rgba(224, 90, 90, 0.12);
}

.field-hint {
  display: block;
  font-size: 0.72rem;
  color: var(--text-secondary);
  margin-top: 0.3rem;
  opacity: 0.7;
}

.form-error {
  font-size: 0.82rem;
  color: var(--error);
  margin-bottom: 0.8rem;
}

.form-error.hidden {
  display: none;
}

.submit-btn {
  width: 100%;
  padding: 0.7rem;
  background: transparent;
  border: 1px solid var(--accent);
  color: var(--accent);
  font-family: 'Inter', sans-serif;
  font-size: 0.9rem;
  letter-spacing: 0.06em;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background 0.25s, color 0.25s;
}

.submit-btn:hover:not(:disabled) {
  background: var(--accent);
  color: var(--bg-deep);
}

.submit-btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

/* ── User Modal ── */
.user-modal-title {
  font-family: 'Cinzel', serif;
  font-size: 1.1rem;
  color: var(--accent);
  margin-bottom: 1rem;
  letter-spacing: 0.08em;
}

.user-modal-placeholder {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

.logout-btn {
  width: 100%;
  padding: 0.65rem;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-family: 'Inter', sans-serif;
  font-size: 0.85rem;
  letter-spacing: 0.06em;
  border-radius: var(--radius);
  cursor: pointer;
  transition: border-color 0.25s, color 0.25s, background 0.25s;
}

.logout-btn:hover {
  border-color: var(--error);
  color: var(--error);
  background: rgba(224, 90, 90, 0.06);
}

/* ── Responsive ── */
@media (max-width: 600px) {
  .topbar {
    padding: 0 1.2rem;
  }
  .hero {
    padding: 5rem 1.2rem 3rem;
  }
  .games-section {
    padding: 2rem 1.2rem 4rem;
  }
}