@import url('https://fonts.googleapis.com/css2?family=Bebas+Neue&family=DM+Mono:wght@300;400;500&display=swap');

:root {
  --bg:       #0d0f0e;
  --surface:  #141716;
  --border:   #1e2320;
  --light-sq: #c8b88a;
  --dark-sq:  #5a7a5a;
  --accent:   #a8d080;
  --accent2:  #e8c84a;
  --red:      #e05050;
  --text:     #d4d8d0;
  --muted:    #818b7f;
}

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

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'DM Mono', monospace;
  min-height: 100vh;
  overflow-x: hidden;
}

body::before {
  content: '';
  position: fixed; inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.025'/%3E%3C/svg%3E");
  pointer-events: none; z-index: 0;
}

#app { position: relative; z-index: 1; min-height: 100vh; }

/* ── SCREENS ── */
.screen { display: none; min-height: 100vh; }
.screen.active { display: flex; }

.logo {
  font-family: 'Bebas Neue', sans-serif;
  font-size: clamp(72px, 10vw, 180px);
  letter-spacing: 0.06em;
  color: var(--accent);
  text-shadow: 0 0 80px rgba(168,208,128,0.2);
  line-height: 1;
}
.logo span { color: var(--accent2); }

/* User cards grid */
#user-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  max-width: 700px;
}

.user-card {
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 14px 20px;
  cursor: pointer;
  transition: all .2s;
  min-width: 160px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.user-card::before {
  content: '';
  position: absolute; inset: 0;
  background: var(--accent);
  transform: translateY(100%);
  transition: transform .2s ease;
  z-index: 0;
}
.user-card:hover::before { transform: translateY(0); }
.user-card:hover .uc-name,
.user-card:hover .uc-sub  { color: var(--bg); position: relative; z-index: 1; }

.uc-name {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 22px;
  letter-spacing: 0.1em;
  color: var(--accent);
  position: relative; z-index: 1;
  transition: color .2s;
}
.uc-sub {
  font-size: 10px;
  color: var(--muted);
  letter-spacing: 0.15em;
  margin-top: 4px;
  position: relative; z-index: 1;
  transition: color .2s;
}

/* New user section */
.new-user-wrap {
  display: flex;
  gap: 10px;
  align-items: stretch;
  flex-wrap: wrap;
  justify-content: center;
}

.home-input {
  padding: 12px 16px;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
  font-family: 'DM Mono', monospace;
  font-size: 13px;
  letter-spacing: 0.08em;
  outline: none;
  width: 200px;
  transition: border-color .2s;
}
.home-input:focus { border-color: var(--muted); }
.home-input::placeholder { color: var(--muted); }

/* Remove number input spinners */
input[type=number]::-webkit-inner-spin-button,
input[type=number]::-webkit-outer-spin-button { -webkit-appearance: none; margin: 0; }
input[type=number] { -moz-appearance: textfield; appearance: textfield; }

.home-btn {
  padding: 12px 28px;
  background: transparent;
  border: 1px solid var(--accent);
  color: var(--accent);
  font-family: 'Bebas Neue', sans-serif;
  font-size: 18px;
  letter-spacing: 0.12em;
  cursor: pointer;
  transition: all .2s;
  white-space: nowrap;
}
.home-btn:hover { background: var(--accent); color: var(--bg); }
.home-btn.secondary {
  border-color: var(--border);
  color: var(--muted);
  font-size: 14px;
}
.home-btn.secondary:hover { border-color: var(--muted); color: var(--text); background: transparent; }

.home-hint {
  font-size: 10px;
  color: var(--muted);
  letter-spacing: 0.15em;
  text-align: center;
}

.tag-btn {
  padding: 6px 12px;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--muted);
  cursor: pointer;
  font-family: inherit;
  font-size: 11px;
  letter-spacing: .08em;
  transition: all .15s;
}
.tag-btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--bg);
}
/* Theme picker — categorized layout */
.theme-cat-label {
  font-size: 9px;
  color: var(--muted);
  letter-spacing: .12em;
  text-transform: uppercase;
  opacity: .55;
  margin: 10px 0 5px;
}
.theme-cat-label:first-child { margin-top: 0; }
.theme-cat-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
/* Greyed-out: not enough puzzles for current phase + rating range */
.tag-btn.theme-disabled {
  opacity: .3;
  cursor: not-allowed;
  pointer-events: none;
}
/* Advanced themes toggle + column layout */
.theme-adv-toggle {
  display: block;
  width: fit-content;
  margin: 10px 0 0 auto;   /* right-aligned */
  padding: 4px 0;
  background: none;
  border: none;
  color: var(--accent2);
  cursor: pointer;
  font-family: inherit;
  font-size: 11px;
  letter-spacing: .08em;
  opacity: .85;
}
.theme-adv-toggle:hover { opacity: 1; }
/* Advanced themes flyout — opens to the right, fixed so nothing clips it */
#theme-advanced-panel {
  position: fixed;
  z-index: 200;
  width: min(620px, calc(100vw - 24px));
  max-height: calc(100vh - 24px);   /* fits any screen; scrolls only if too tall */
  overflow-y: auto;                 /* auto → no scrollbar unless needed */
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px 18px;
  box-shadow: 0 12px 40px rgba(0,0,0,0.5);
  scrollbar-width: thin;                            /* Firefox */
  scrollbar-color: var(--border) transparent;       /* Firefox: thumb / track */
}
/* Custom scrollbar — matches the site (WebKit/Chromium) */
#theme-advanced-panel::-webkit-scrollbar {
  width: 8px;
}
#theme-advanced-panel::-webkit-scrollbar-track {
  background: transparent;
  margin: 6px 0;
}
#theme-advanced-panel::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 4px;
}
#theme-advanced-panel::-webkit-scrollbar-thumb:hover {
  background: var(--accent2);
}
.theme-adv-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 14px 16px;
}
.theme-adv-col {
  display: flex;
  flex-direction: column;
  gap: 5px;
  align-items: stretch;
}
.theme-adv-col .tag-btn {
  width: 100%;
  text-align: left;
}