@import url('https://fonts.googleapis.com/css2?family=Ubuntu:ital,wght@0,300;0,400;0,500;0,700;1,300;1,400;1,500;1,700&display=swap');

:root,
[data-theme="minimal"] {
  --bg: #111111;
  --panel: #1a1a1a;
  --accent: #22c55e;
  --accent-soft: rgba(34, 197, 94, 0.2);
  --text: #e5e5e5;
  --muted: #a0a0a0;
  --nav-bg: #0a0a0a;
  --nav-border: rgba(34, 197, 94, 0.55);
  --glow: rgba(34, 197, 94, 0.3);
  --glow-soft: rgba(34, 197, 94, 0.09);
  --glow-subtle: rgba(34, 197, 94, 0.12);
}

[data-theme="classic"] {
  --bg: #1f1f1f;
  --panel: #2b2b2b;
  --accent: #d4a017;
  --accent-soft: rgba(212, 160, 23, 0.2);
  --text: #e5e5e5;
  --muted: #a0a0a0;
  --nav-bg: #141414;
  --nav-border: rgba(212, 160, 23, 0.55);
  --glow: rgba(212, 160, 23, 0.3);
  --glow-soft: rgba(212, 160, 23, 0.09);
  --glow-subtle: rgba(212, 160, 23, 0.12);
}

[data-theme="navy"] {
  --bg: #0f172a;
  --panel: #1e293b;
  --accent: #3b82f6;
  --accent-soft: rgba(59, 130, 246, 0.2);
  --text: #e5e5e5;
  --muted: #94a3b8;
  --nav-bg: #080e1a;
  --nav-border: rgba(59, 130, 246, 0.55);
  --glow: rgba(59, 130, 246, 0.3);
  --glow-soft: rgba(59, 130, 246, 0.09);
  --glow-subtle: rgba(59, 130, 246, 0.12);
}

[data-theme="wood"] {
  --bg: #2c2c2c;
  --panel: #3a3a3a;
  --accent: #e63946;
  --accent-soft: rgba(230, 57, 70, 0.2);
  --text: #e5e5e5;
  --muted: #a0a0a0;
  --nav-bg: #1a1a1a;
  --nav-border: rgba(230, 57, 70, 0.55);
  --glow: rgba(230, 57, 70, 0.3);
  --glow-soft: rgba(230, 57, 70, 0.09);
  --glow-subtle: rgba(230, 57, 70, 0.12);
}

body {
  font-family: 'Space Grotesk', 'Segoe UI', sans-serif;
  background-color: var(--bg);
  color: var(--text);
  margin: 0;
  padding: 0;
  min-height: 100vh;
  overflow-x: hidden;
  display: block;
}

#menu {
  position: sticky;
  top: 0;
  display: flex;
  width: 100%;
  background: var(--nav-bg);
  border-bottom: 2px solid var(--nav-border);
  border-radius: 0 0 20px 20px;
  overflow: hidden;
  z-index: 5;
}

.tab {
  flex: 1;
  text-align: center;
  padding: 1.2rem 0;
  cursor: pointer;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  font-weight: 600;
  color: var(--muted);
  border-bottom: 2px solid transparent;
  transition: color 0.3s ease, border-color 0.3s ease;
}

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

.tab:hover {
  color: #fff;
}

.game-shell,
.lobby,
.profile,
.pair,
.val {
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.pair {
  width: min(1100px, 90vw);
  margin: 2rem auto;
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  justify-content: center;
}

.game-square,
.friend-square {
  width: min(240px, 40vw);
  aspect-ratio: 1/1;
  border-radius: 24px;
  background: var(--panel);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 600;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.35);
  border: 1px solid rgba(255, 255, 255, 0.08);
  cursor: pointer;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.game-square:hover,
.friend-square:hover {
  transform: translateY(-10px);
  box-shadow: 0 35px 50px var(--glow);
  background: var(--glow-subtle);
}

.lobby {
  width: min(800px, 90vw);
  margin: 2rem auto;
  background: var(--panel);
  padding: 2rem;
  border-radius: 28px;
  box-shadow: 0 25px 55px rgba(0, 0, 0, 0.35);
  max-height: 80vh;
  overflow-y: auto;
}

.item {
  padding: 1.2rem;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.03);
  margin-bottom: 1rem;
  transition: background 0.3s ease, transform 0.3s ease;
}

.item:hover {
  background: var(--glow-soft);
  transform: translateX(6px);
}

.item p:nth-of-type(1) {
  font-size: 1.2rem;
  font-weight: 600;
  margin: 0 0 0.25rem 0;
}

.item p:nth-of-type(2) {
  margin: 0;
  color: var(--muted);
}

.profile {
  width: min(550px, 90vw);
  margin: 2rem auto;
  background: var(--panel);
  padding: 2rem;
  border-radius: 28px;
  box-shadow: 0 25px 55px rgba(0, 0, 0, 0.35);
}

#name {
  font-size: clamp(2rem, 6vw, 3.5rem);
  font-weight: 700;
  margin-bottom: 1rem;
}

.sect {
  padding: 1.5rem;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.04);
  margin-top: 1rem;
}

.title {
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
}

.login {
  display: inline-block;
  margin-top: 0.5rem;
  padding: 0.5rem 1rem;
  border-radius: 999px;
  background: rgba(255, 107, 107, 0.3);
}

#custom {
  width: min(900px, 95vw);
  margin: 2rem auto;
  display: grid;
  grid-template-columns: 1fr 150px;
  gap: 1.5rem;
  align-items: start;
}

#custom-board-area {
  background: var(--panel);
  border-radius: 28px;
  padding: 1.5rem;
  box-shadow: 0 25px 55px rgba(0, 0, 0, 0.35);
}

#custom-controls {
  background: var(--panel);
  border-radius: 20px;
  padding: 1.25rem;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.06);
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  position: sticky;
  top: 5rem;
}

.custom-controls-title {
  font-weight: 600;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin: 0 0 0.1rem 0;
}

.custom-controls-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.custom-controls-row label {
  font-size: 0.8rem;
  color: var(--muted);
  width: 2rem;
  flex-shrink: 0;
}

.custom-controls-row select {
  flex: 1;
  width: auto;
  margin-bottom: 0;
  padding: 0.35rem 0.4rem;
  font-size: 0.8rem;
  border-radius: 8px;
}

.custom-controls-btns {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  margin-top: 0.25rem;
}

.ctrl-btn {
  width: 100%;
  padding: 0.5rem 0;
  border: none;
  border-radius: 8px;
  font-family: inherit;
  font-weight: 600;
  font-size: 0.8rem;
  cursor: pointer;
  transition: opacity 0.2s ease;
}

.ctrl-btn:hover { opacity: 0.8; }
.ctrl-btn.create { background: var(--accent); color: #fff; }
.ctrl-btn.reset  { background: rgba(255, 255, 255, 0.1); color: var(--text); }
.ctrl-btn.clear  { background: rgba(220, 60, 60, 0.25); color: #ff9090; }

input,
select {
  font-family: inherit;
  font-size: 1rem;
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(255, 255, 255, 0.05);
  color: var(--text);
  padding: 0.9rem 1rem;
  width: 100%;
  box-sizing: border-box;
  margin-bottom: 1rem;
}

input:focus,
select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.friend-square {
  width: 100%;
  height: auto;
  padding: 1.25rem;
  border-radius: 18px;
}

.action-row button,
input[type='submit'] {
  cursor: pointer;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 999px;
  padding: 0.9rem 2.2rem;
  font-weight: 600;
  box-shadow: 0 20px 35px var(--glow);
  transition: transform 0.2s ease;
}

.action-row button:active,
input[type='submit']:active {
  transform: translateY(2px);
}

.val {
  opacity: 1;
}

.val:not(.active) {
  opacity: 0;
  pointer-events: none;
}

.spare {
  display: flex;
  width: 75%;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 12px;
  padding: 0.4rem;
  box-sizing: border-box;
  margin: 0.75rem auto;
  justify-content: flex-start;
  align-items: center;
}

.spare img {
  position: relative !important;
  left: auto !important;
  top: auto !important;
  transform: none !important;
  height: auto !important;
  flex: 0 0 16.667%;
  max-width: 16.667%;
  aspect-ratio: 1 / 1;
  object-fit: contain;
  pointer-events: auto !important;
  cursor: grab;
}

#custom .square img {
  pointer-events: auto !important;
  cursor: grab;
}

.theme-row {
  display: flex;
  gap: 0.75rem;
  margin-top: 0.75rem;
  flex-wrap: wrap;
}

.theme-btn {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  border-radius: 999px;
  border: 2px solid rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.05);
  color: var(--text);
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: border-color 0.2s ease, background 0.2s ease;
}

.theme-btn .swatch {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  flex-shrink: 0;
}

.theme-btn:hover {
  border-color: rgba(255, 255, 255, 0.35);
  background: rgba(255, 255, 255, 0.1);
}

.theme-btn.active {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.friends-panel {
  width: min(600px, 90vw);
  margin: 2rem auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.friends-card {
  background: var(--panel);
  border-radius: 20px;
  padding: 1.25rem 1.5rem;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.friends-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  padding-bottom: 0.4rem;
  transition: color 0.2s ease;
}

.friends-card-header:hover {
  color: var(--accent);
}

.friends-card-header:hover .friends-card-arrow {
  transform: translateX(4px);
}

.friends-card-arrow {
  transition: transform 0.2s ease;
}

.friends-card-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin: 0 0 0.25rem 0;
}

.friends-card-desc {
  font-size: 0.85rem;
  color: var(--muted);
  margin: 0 0 0.75rem 0;
}

.friends-card select {
  margin-bottom: 0;
}

@media (max-width: 768px) {
  .pair {
    margin-top: 4rem;
  }
  .game-square {
    width: 100%;
  }
  #custom {
    grid-template-columns: 1fr;
  }
  #custom-controls {
    order: -1;
    position: static;
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.75rem;
  }
  .custom-controls-btns {
    flex-direction: row;
    margin-top: 0;
  }
  .ctrl-btn {
    width: auto;
    padding: 0.5rem 1rem;
  }
}