/* ==========================================================================
   QuantPits-Arena: Main Layout & Typography
   ========================================================================== */

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

html {
  font-size: 14px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-base);
  color: var(--text-primary);
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* Custom Scrollbars */
::-webkit-scrollbar {
  width: 7px;
  height: 7px;
}
::-webkit-scrollbar-track {
  background: var(--bg-base);
}
::-webkit-scrollbar-thumb {
  background: var(--bg-surface-elevated);
  border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--border-medium);
}

/* Typography Helpers */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

h1 { font-size: 2.2rem; line-height: 1.2; }
h2 { font-size: 1.6rem; line-height: 1.3; }
h3 { font-size: 1.25rem; line-height: 1.4; }
h4 { font-size: 1.05rem; }

.font-mono {
  font-family: var(--font-mono);
}

a {
  color: var(--brand-cyan);
  text-decoration: none;
  transition: color var(--transition-fast);
}
a:hover {
  text-decoration: underline;
}

/* Header & Navigation Bar */
.app-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  height: 64px;
  display: flex;
  align-items: center;
}

.header-container {
  width: 100%;
  max-width: 1600px;
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Brand Link */
.brand-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
}

.brand-logo-badge {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--brand-cyan), var(--brand-purple));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 800;
  box-shadow: 0 0 16px rgba(56, 189, 248, 0.35);
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-name {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.brand-edition {
  font-size: 0.68rem;
  color: var(--text-muted);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Segmented Navigation Menu */
.nav-segmented {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  background: var(--bg-surface);
  padding: 4px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-subtle);
  box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.2);
}

.nav-link {
  display: flex;
  align-items: center;
  padding: 0.45rem 1rem;
  border-radius: var(--radius-full);
  font-size: 0.84rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.nav-link:hover {
  color: var(--text-primary);
  background: var(--bg-surface-elevated);
}

.nav-link.active {
  color: #ffffff;
  background: linear-gradient(135deg, rgba(56, 189, 248, 0.28), rgba(168, 85, 247, 0.28));
  border: 1px solid rgba(56, 189, 248, 0.45);
  font-weight: 600;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.25);
}

/* Secondary Platform Infrastructure / Methodology Links */
.nav-secondary-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  margin-right: 0.5rem;
  background: var(--bg-surface);
  padding: 3px 6px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-subtle);
}

.nav-link-secondary {
  display: flex;
  align-items: center;
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-full);
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.nav-link-secondary:hover {
  color: var(--text-primary);
  background: var(--bg-surface-elevated);
  text-decoration: none;
}

.nav-link-secondary.active {
  color: #ffffff;
  background: linear-gradient(135deg, rgba(56, 189, 248, 0.25), rgba(168, 85, 247, 0.25));
  border: 1px solid rgba(56, 189, 248, 0.4);
  font-weight: 600;
}

/* Header Action Controls */
.header-actions {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.season-badge {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-full);
  background: rgba(16, 185, 129, 0.08);
  border: 1px solid rgba(16, 185, 129, 0.28);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent-positive);
  letter-spacing: 0.02em;
}

.pulse-indicator {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent-positive);
  box-shadow: 0 0 8px var(--accent-positive);
  animation: pulse 2s infinite ease-in-out;
}

@keyframes pulse {
  0% { transform: scale(0.95); opacity: 0.7; }
  50% { transform: scale(1.3); opacity: 1; }
  100% { transform: scale(0.95); opacity: 0.7; }
}

.theme-toggle-btn {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.theme-toggle-btn:hover {
  color: var(--text-primary);
  border-color: var(--border-medium);
  background: var(--bg-surface-elevated);
}

/* Main Container & View Router */
.app-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  width: 100%;
  max-width: 1600px;
  margin: 0 auto;
  padding: 1.5rem;
  gap: 1.5rem;
}

.view-container {
  display: none;
  animation: fadeIn 0.2s ease-in-out;
}

.view-container.active {
  display: block;
}

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

/* Footer */
.app-footer {
  margin-top: auto;
  border-top: 1px solid var(--border-subtle);
  background: var(--bg-subtle);
  padding: 2rem 1.5rem;
}

.footer-container {
  width: 100%;
  max-width: 1600px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.footer-col {
  display: flex;
  flex-direction: column;
}