/* AquaExpo: Modern Glassmorphic Dark UI */
:root {
  --bg-primary: #090d16;
  --bg-secondary: #111827;
  --bg-card: rgba(17, 24, 39, 0.85);
  --border-color: rgba(255, 255, 255, 0.08);
  --accent-cyan: #06b6d4;
  --accent-emerald: #10b981;
  --accent-amber: #f59e0b;
  --accent-rose: #f43f5e;
  --accent-purple: #8b5cf6;
  --text-main: #f3f4f6;
  --text-muted: #9ca3af;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-main);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

/* Header & Top Bar */
header {
  background: rgba(17, 24, 39, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  padding: 0.75rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 50;
}

.logo-area {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.logo-icon {
  font-size: 1.8rem;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-emerald));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.logo-text h1 {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.logo-text span {
  font-size: 0.75rem;
  color: var(--accent-cyan);
  background: rgba(6, 182, 212, 0.12);
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
  font-weight: 600;
}

.stats-bar {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.stat-badge {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(255, 255, 255, 0.04);
  padding: 0.4rem 0.85rem;
  border-radius: 9999px;
  border: 1px solid var(--border-color);
  font-size: 0.85rem;
  font-weight: 600;
}

.stat-badge.wallet {
  color: #fbbf24;
  border-color: rgba(251, 191, 36, 0.3);
}

.stat-badge.booth {
  color: var(--accent-cyan);
  border-color: rgba(6, 182, 212, 0.3);
}

/* Nav Tabs */
nav.tab-nav {
  display: flex;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem 0;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  overflow-x: auto;
}

.tab-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  padding: 0.65rem 1.2rem;
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: 8px 8px 0 0;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.tab-btn:hover {
  color: var(--text-main);
  background: rgba(255, 255, 255, 0.04);
}

.tab-btn.active {
  color: var(--accent-cyan);
  background: var(--bg-primary);
  border-bottom: 2px solid var(--accent-cyan);
}

/* Main Workspace */
main {
  flex: 1;
  padding: 1.5rem;
  max-width: 1400px;
  margin: 0 auto;
  width: 100%;
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
  animation: fadeIn 0.25s ease-out;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Tank Viewport Grid */
.tank-grid {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: 1.5rem;
}

@media (max-width: 1024px) {
  .tank-grid {
    grid-template-columns: 1fr;
  }
}

.canvas-container {
  background: #000;
  border-radius: 14px;
  border: 2px solid rgba(255, 255, 255, 0.1);
  overflow: hidden;
  box-shadow: 0 20px 40px -15px rgba(0, 0, 0, 0.7);
  position: relative;
}

canvas#aquariumCanvas {
  width: 100%;
  height: 480px;
  display: block;
}

.canvas-overlay-actions {
  position: absolute;
  bottom: 1rem;
  left: 1rem;
  right: 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  pointer-events: none;
}

.canvas-actions-left, .canvas-actions-right {
  display: flex;
  gap: 0.5rem;
  pointer-events: auto;
}

.btn {
  padding: 0.6rem 1.1rem;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.85rem;
  border: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  transition: all 0.15s ease;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-cyan), #0891b2);
  color: #fff;
  box-shadow: 0 4px 12px rgba(6, 182, 212, 0.3);
}

.btn-primary:hover {
  filter: brightness(1.1);
  transform: translateY(-1px);
}

.btn-emerald {
  background: linear-gradient(135deg, var(--accent-emerald), #059669);
  color: #fff;
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
  backdrop-filter: blur(8px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.18);
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-main);
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.05);
}

/* Sidebar Panels */
.panel-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 1.25rem;
  margin-bottom: 1rem;
}

.panel-title {
  font-size: 0.95rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.75rem;
  color: var(--text-main);
}

.water-stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.6rem;
}

.stat-item {
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid var(--border-color);
  padding: 0.6rem 0.8rem;
  border-radius: 8px;
}

.stat-label {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.stat-value {
  font-size: 1.1rem;
  font-weight: 700;
  margin-top: 0.2rem;
}

.stat-value.optimal {
  color: var(--accent-emerald);
}

.stat-value.warning {
  color: var(--accent-amber);
}

/* Shrimp Roster Table */
.shrimp-list {
  max-height: 240px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-top: 0.5rem;
}

.shrimp-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  padding: 0.5rem 0.75rem;
  border-radius: 8px;
  font-size: 0.82rem;
}

.shrimp-badge {
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
  font-size: 0.7rem;
  font-weight: 700;
}

.badge-common { background: #374151; color: #d1d5db; }
.badge-uncommon { background: #065f46; color: #6ee7b7; }
.badge-rare { background: #1e40af; color: #93c5fd; }
.badge-epic { background: #6b21a8; color: #e9d5ff; }
.badge-legendary { background: #92400e; color: #fde68a; border: 1px solid #f59e0b; }

/* Grid Cards (Market, Fair, etc) */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.25rem;
}

.card-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: transform 0.15s ease, border-color 0.15s ease;
}

.card-item:hover {
  transform: translateY(-2px);
  border-color: rgba(6, 182, 212, 0.35);
}

/* Modal Window */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 1rem;
}

.modal-content {
  background: var(--bg-secondary);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 16px;
  width: 100%;
  max-width: 580px;
  padding: 2rem;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.85);
}

.modal-title {
  font-size: 1.4rem;
  font-weight: 800;
  margin-bottom: 0.5rem;
}

.modal-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
  line-height: 1.5;
}

.starter-options {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.starter-card {
  border: 2px solid var(--border-color);
  border-radius: 12px;
  padding: 1rem;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s ease;
  background: rgba(255, 255, 255, 0.02);
}

.starter-card:hover, .starter-card.selected {
  border-color: var(--accent-cyan);
  background: rgba(6, 182, 212, 0.08);
  transform: translateY(-2px);
}

.starter-card .color-blob {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  margin: 0 auto 0.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
}

/* Chat UI */
.chat-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  height: 620px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 14px;
  overflow: hidden;
}

.chat-sidebar {
  background: rgba(0, 0, 0, 0.2);
  border-right: 1px solid var(--border-color);
  padding: 1rem;
  overflow-y: auto;
}

.chat-main {
  display: flex;
  flex-direction: column;
}

.chat-messages {
  flex: 1;
  padding: 1.25rem;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.chat-msg {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  padding: 0.6rem 0.85rem;
  border-radius: 8px;
  font-size: 0.88rem;
  line-height: 1.4;
}

.chat-msg .sender {
  font-weight: 700;
  color: var(--accent-cyan);
  margin-right: 0.5rem;
}

.chat-msg .time {
  font-size: 0.7rem;
  color: var(--text-muted);
  float: right;
}

.chat-input-bar {
  padding: 0.75rem 1rem;
  border-top: 1px solid var(--border-color);
  display: flex;
  gap: 0.5rem;
  background: rgba(0, 0, 0, 0.2);
}

.chat-input-bar input {
  flex: 1;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  padding: 0.6rem 1rem;
  border-radius: 8px;
  color: #fff;
  outline: none;
}

.chat-input-bar input:focus {
  border-color: var(--accent-cyan);
}