:root {
  --bg-base: #08070d;
  --glass-bg: rgba(255, 255, 255, 0.045);
  --glass-bg-hover: rgba(255, 255, 255, 0.09);
  --glass-border: rgba(255, 255, 255, 0.09);
  --glass-border-hover: rgba(139, 108, 255, 0.5);
  --accent-1: #8b6cff;
  --accent-2: #4f9bff;
  --accent-3: #ff6ec7;
  --glow: 0 12px 40px rgba(139, 108, 255, 0.2);
}

body {
  font-family: "Inter", system-ui, sans-serif;
  background: var(--bg-base);
  color: #f3f2f7;
  position: relative;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(circle at 15% 20%, rgba(139, 108, 255, .35), rgba(139, 108, 255, 0) 40%),
    radial-gradient(circle at 85% 15%, rgba(79, 155, 255, .28), rgba(79, 155, 255, 0) 45%),
    radial-gradient(circle at 50% 95%, rgba(255, 110, 199, .22), rgba(255, 110, 199, 0) 50%),
    var(--bg-base);
}

h1, h2, h3, h4, h5, .navbar-brand {
  font-family: "Space Grotesk", "Inter", sans-serif;
}

main {
  animation: fadeInUp .5s ease both;
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

.navbar {
  position: sticky;
  top: 0;
  z-index: 1030;
  background: rgba(10, 9, 16, 0.55) !important;
  backdrop-filter: blur(20px) saturate(160%);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
  border-bottom: 1px solid var(--glass-border);
}

.navbar-brand {
  font-weight: 600;
  letter-spacing: .01em;
  background: linear-gradient(135deg, var(--accent-1), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.card, .list-group-item {
  background: var(--glass-bg) !important;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border) !important;
  border-radius: 16px !important;
  transition: transform .25s ease, border-color .25s ease, box-shadow .25s ease, background .25s ease;
}

.card:hover {
  transform: translateY(-4px);
  border-color: var(--glass-border-hover) !important;
  box-shadow: var(--glow);
  background: var(--glass-bg-hover) !important;
}

.list-group-item + .list-group-item {
  margin-top: 8px;
}

.btn {
  border-radius: 999px;
  font-weight: 500;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease, border-color .2s ease;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-1), var(--accent-2));
  border: none;
  box-shadow: 0 4px 20px rgba(139, 108, 255, .35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(139, 108, 255, .5);
}

.btn-outline-light, .btn-outline-secondary, .btn-outline-primary, .btn-outline-danger {
  border-color: var(--glass-border);
  backdrop-filter: blur(10px);
}

.btn-outline-light:hover {
  border-color: var(--glass-border-hover);
  background: var(--glass-bg-hover);
  transform: translateY(-2px);
}

.badge {
  border-radius: 999px;
  font-weight: 500;
  letter-spacing: .02em;
  padding: .4em .8em;
}

.form-control, .form-select {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  color: #f3f2f7;
  backdrop-filter: blur(10px);
}

.form-control:focus, .form-select:focus {
  background: var(--glass-bg-hover);
  border-color: var(--accent-1);
  box-shadow: 0 0 0 .2rem rgba(139, 108, 255, .25);
  color: #fff;
}

.form-control::placeholder {
  color: rgba(243, 242, 247, 0.4);
}

::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, .15);
  border-radius: 999px;
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, .25);
}

#board {
  display: grid;
  grid-template-columns: repeat(3, 92px);
  grid-template-rows: repeat(3, 92px);
  gap: 10px;
}

.cell {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.75rem;
  font-weight: 600;
  font-family: "Space Grotesk", sans-serif;
  background: var(--glass-bg);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--glass-border);
  border-radius: 14px;
  cursor: pointer;
  user-select: none;
  transition: transform .2s ease, background .2s ease, border-color .2s ease;
}

.cell:hover {
  background: var(--glass-bg-hover);
  border-color: var(--glass-border-hover);
  transform: scale(1.03);
}

.cell-x {
  color: var(--accent-1);
  text-shadow: 0 0 18px rgba(139, 108, 255, .6);
}

.cell-o {
  color: var(--accent-3);
  text-shadow: 0 0 18px rgba(255, 110, 199, .6);
}

.p4-board {
  display: grid;
  grid-template-columns: repeat(7, 52px);
  grid-template-rows: repeat(6, 52px);
  gap: 8px;
}

.p4-cell {
  border-radius: 50%;
}

.p4-cell.filled-x {
  background: var(--accent-1) !important;
  box-shadow: 0 0 16px rgba(139, 108, 255, .6);
}

.p4-cell.filled-o {
  background: var(--accent-3) !important;
  box-shadow: 0 0 16px rgba(255, 110, 199, .6);
}

.pendu-word {
  font-family: "Space Grotesk", sans-serif;
  letter-spacing: .3em;
}

.rami-card {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 74px;
  font-size: 1.1rem;
  font-weight: 600;
  font-family: "Space Grotesk", sans-serif;
  background: var(--glass-bg);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--glass-border);
  border-radius: 10px;
  color: #f3f2f7;
  user-select: none;
  transition: transform .15s ease, border-color .15s ease, box-shadow .15s ease;
}

.rami-card.rami-red {
  color: var(--accent-3);
}

.rami-card.card-back {
  background: linear-gradient(135deg, var(--accent-1), var(--accent-2));
  border: none;
}

.rami-card.rami-selected {
  transform: translateY(-6px);
  border-color: var(--glass-border-hover);
  box-shadow: var(--glow);
}

.rami-combo {
  display: flex;
  gap: 4px;
  padding: 6px;
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  background: var(--glass-bg);
}

.rami-combo.rami-selected {
  border-color: var(--glass-border-hover);
  box-shadow: var(--glow);
}