/* === Reset & Base === */
* { margin: 0; padding: 0; box-sizing: border-box; }

html, body {
  height: 100%;
  overflow: hidden;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Inter', system-ui, sans-serif;
  color: #fff;
  background: linear-gradient(135deg, #1a0533, #0d2b45, #1a3a4a, #2d1b69);
  background-size: 400% 400%;
  animation: gradientShift 20s ease infinite;
  display: flex;
}

@keyframes gradientShift {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

@keyframes pulseGlow {
  0% { box-shadow: 0 8px 32px rgba(0, 0, 0, 0.15); }
  50% { box-shadow: 0 8px 32px rgba(100, 200, 255, 0.3); }
  100% { box-shadow: 0 8px 32px rgba(0, 0, 0, 0.15); }
}

/* === Shared === */
.icon {
  width: 16px; height: 16px;
  fill: none; stroke: currentColor;
  stroke-width: 2; stroke-linecap: round; stroke-linejoin: round;
  flex-shrink: 0;
}

.glass {
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(20px) saturate(1.4);
  -webkit-backdrop-filter: blur(20px) saturate(1.4);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 16px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
  position: relative;
  overflow: hidden;
}

.glass::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
  pointer-events: none;
}

/* === Layout === */
.tables-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: 1.5rem;
  min-width: 0;
  height: 100%;
}

.tables-boundary {
  flex: 1;
  border: 1px dashed rgba(255, 255, 255, 0.12);
  border-radius: 20px;
  overflow: auto;
  scrollbar-width: thin;
  scrollbar-color: rgba(255,255,255,0.12) transparent;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.25rem;
  position: relative;
}

.tables-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  justify-content: center;
  align-content: center;
  width: 100%;
  min-height: 100%;
}

.table-visual-wrapper {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.4rem;
  transform-origin: top left;
  overflow: hidden;
}

.sidebar {
  width: 360px;
  flex-shrink: 0;
  height: 100%;
  display: flex;
  flex-direction: column;
  padding: 1.5rem 1.5rem 1.5rem 0;
  gap: 1rem;
  overflow: hidden;
}

/* === Panels === */
.panel {
  padding: 1.4rem;
}

.panel h2 {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.9rem;
  opacity: 0.5;
  font-weight: 600;
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.85rem;
}

.panel-header h2 { margin-bottom: 0; }

/* === Settings Panel === */
.settings-panel {
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.settings-panel h2 {
  margin-bottom: 0.5rem;
}

.setting-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.setting-row label {
  font-size: 0.85rem;
  opacity: 0.7;
}

/* Unified number input style */
.num-input {
  width: 56px;
  height: 32px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 8px;
  padding: 0;
  color: #fff;
  font-size: 0.85rem;
  line-height: 32px;
  text-align: center;
  outline: none;
  transition: border-color 0.2s ease, background 0.2s ease;
  -moz-appearance: textfield;
}

.num-input::-webkit-inner-spin-button,
.num-input::-webkit-outer-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

.num-input:focus {
  border-color: rgba(255, 255, 255, 0.3);
  background: rgba(255, 255, 255, 0.1);
}

/* Table sizes sub-section — h2 inherits from .panel h2 */
.table-sizes {
  max-height: 200px;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: rgba(255,255,255,0.15) transparent;
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.table-size-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.2rem 0;
  font-size: 0.85rem;
  opacity: 0.7;
}

.table-size-row:hover {
  opacity: 0.9;
}

.table-size-row span { flex: 1; }

/* Shape toggle */
.shape-toggle {
  display: flex;
  gap: 0.2rem;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  padding: 0.15rem;
  height: 32px;
}

.shape-btn {
  flex: 1;
  padding: 0.25rem 0.5rem;
  border: none;
  border-radius: 6px;
  background: transparent;
  color: rgba(255, 255, 255, 0.45);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
}

.shape-btn .icon { width: 16px; height: 16px; }
.shape-btn:hover { color: rgba(255, 255, 255, 0.7); }
.shape-btn.active { background: rgba(255, 255, 255, 0.1); color: #fff; }

/* Shuffle button */
.btn-shuffle {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid rgba(100, 200, 255, 0.3);
  border-radius: 12px;
  background: rgba(100, 200, 255, 0.1);
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

.btn-shuffle .icon { width: 18px; height: 18px; }

.btn-shuffle:hover:not(:disabled) {
  background: rgba(100, 200, 255, 0.2);
  transform: translateY(-1px);
  box-shadow: 0 4px 20px rgba(100, 200, 255, 0.2);
}

.btn-shuffle:disabled { opacity: 0.4; cursor: not-allowed; }

/* === Guest List Panel === */
.guest-list-panel {
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
}

.add-form {
  display: flex;
  gap: 0.35rem;
  margin-bottom: 0.75rem;
  flex-shrink: 0;
  align-items: center;
}

.add-form input {
  flex: 1;
  min-width: 0;
  height: 42px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 10px;
  padding: 0 0.85rem;
  color: #fff;
  font-size: 0.95rem;
  outline: none;
  transition: all 0.2s ease;
}

.add-form input::placeholder { color: rgba(255, 255, 255, 0.35); }
.add-form input:focus {
  border-color: rgba(255, 255, 255, 0.3);
  background: rgba(255, 255, 255, 0.1);
}

/* Icon buttons (add, etc.) */
.btn-icon {
  width: 42px; height: 42px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.05);
  color: #fff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
  flex-shrink: 0;
}

.btn-icon:hover {
  background: rgba(255, 255, 255, 0.15);
  transform: translateY(-1px);
}

.btn-icon .icon { width: 18px; height: 18px; }

/* Gender toggle button */
.gender-toggle {
  width: 42px; height: 42px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 50%;
  color: #fff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
  user-select: none;
  flex-shrink: 0;
}

.gender-toggle:hover {
  border-color: rgba(255, 255, 255, 0.3);
  background: rgba(255, 255, 255, 0.1);
}

.gender-toggle .icon { width: 18px; height: 18px; }

/* Virtual-scrolled guest list */
.guest-list-scroll {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: rgba(255,255,255,0.15) transparent;
  position: relative;
}

.guest-list-viewport { position: relative; }

.guest-row {
  display: flex;
  align-items: center;
  padding: 0 0.2rem;
  border-radius: 7px;
  transition: background 0.15s ease;
  gap: 0.35rem;
}

.guest-row:hover { background: rgba(255, 255, 255, 0.05); }
.guest-row .name { flex: 1; font-size: 0.95rem; }

.gender-chip {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 30px; height: 30px;
  border-radius: 8px;
  flex-shrink: 0;
}

.gender-chip .icon { width: 15px; height: 15px; }
.gender-chip.M { background: rgba(100, 180, 255, 0.2); color: rgba(150, 210, 255, 1); }
.gender-chip.F { background: rgba(255, 130, 180, 0.2); color: rgba(255, 170, 200, 1); }

.btn-delete {
  width: 30px; height: 30px;
  border: none; border-radius: 50%;
  background: transparent;
  color: rgba(255, 255, 255, 0.25);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s ease;
  flex-shrink: 0;
}

.btn-delete .icon { width: 14px; height: 14px; }
.btn-delete:hover { background: rgba(255, 80, 80, 0.2); color: rgba(255, 120, 120, 1); }

.btn-clear {
  width: 30px; height: 30px;
  border: none; border-radius: 50%;
  background: transparent;
  color: rgba(255, 255, 255, 0.3);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s ease;
}

.btn-clear .icon { width: 15px; height: 15px; }
.btn-clear:hover { background: rgba(255, 80, 80, 0.15); color: rgba(255, 120, 120, 1); }

/* === Table Visuals === */
.table-visual-wrapper.shuffled { animation: pulseGlow 0.8s ease; }

.table-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  opacity: 0.5;
  font-weight: 600;
}

.table-visual { position: relative; }

.table-shape {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  background: rgba(255, 255, 255, 0.04);
  border: 2px solid rgba(255, 255, 255, 0.1);
}

.table-shape.round { border-radius: 50%; }
.table-shape.rectangle { border-radius: 10px; }

.seat {
  position: absolute;
  transform: translate(-50%, -50%);
  white-space: normal;
  text-align: center;
  font-size: 0.8rem;
  line-height: 1.3;
  padding: 0.35rem 0.3rem 0.2rem;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  cursor: default;
  transition: all 0.2s ease;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.1rem;
  width: var(--seat-w, 90px);
  height: var(--seat-h, 56px);
  overflow: hidden;
  word-break: break-word;
}

.seat .seat-name {
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

.seat.occupied { background: rgba(255, 255, 255, 0.08); border-color: rgba(255, 255, 255, 0.18); }
.seat.occupied.M { border-color: rgba(100, 180, 255, 0.3); background: rgba(100, 180, 255, 0.08); }
.seat.occupied.F { border-color: rgba(255, 130, 180, 0.3); background: rgba(255, 130, 180, 0.08); }
.seat.empty-seat { opacity: 0.25; border-style: dashed; }
.seat.pinned { box-shadow: 0 0 8px rgba(255, 200, 100, 0.25); border-color: rgba(255, 200, 100, 0.45); }

.seat .seat-pin-btn {
  background: none; border: none;
  color: rgba(255, 255, 255, 0.25);
  cursor: pointer; padding: 0;
  display: flex; align-items: center;
  transition: color 0.15s;
}

.seat .seat-pin-btn:hover { color: rgba(255, 200, 100, 0.8); }
.seat .seat-pin-btn .icon { width: 12px; height: 12px; }
.seat.pinned .seat-pin-btn { color: rgba(255, 200, 100, 1); }

/* === Warning === */
.warning-banner {
  background: rgba(255, 180, 50, 0.12);
  border: 1px solid rgba(255, 180, 50, 0.25);
  border-radius: 8px;
  padding: 0.5rem 0.8rem;
  margin-bottom: 0.75rem;
  font-size: 0.8rem;
  display: none;
  color: rgba(255, 210, 130, 1);
  flex-shrink: 0;
}

.warning-banner.visible { display: flex; align-items: center; gap: 0.4rem; }
.warning-banner .icon { width: 14px; height: 14px; flex-shrink: 0; }

/* === Empty / Zero States === */
.empty-state {
  text-align: center;
  padding: 2rem;
  opacity: 0.35;
  font-size: 0.95rem;
  width: 100%;
}

.zero-state {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
  opacity: 0.35;
  padding: 2rem;
  pointer-events: none;
}

.zero-state svg { width: 180px; height: 180px; }
.zero-state p { font-size: 1.1rem; font-style: italic; letter-spacing: 0.01em; }

/* === Responsive === */
@media (max-width: 900px) {
  body { flex-direction: column; }
  .sidebar { width: 100%; height: auto; max-height: 45vh; padding: 1rem; }
  .tables-area { padding: 1rem; }
}