/* ==========================================================================
   GridMaster - Main Layout & Core Component Styles
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;600&family=Plus+Jakarta+Sans:wght@400;500;600;700&family=Syne:wght@600;700;800&display=swap');

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

html, body {
  width: 100%;
  min-height: 100%;
  overflow-x: hidden;
  overflow-y: auto;
  background-color: var(--bg-app);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* App Shell */
#app {
  display: flex;
  flex-direction: column;
  width: 100%;
  min-height: 100vh;
  background: var(--bg-app);
  position: relative;
  overflow-x: hidden;
}

/* Header Bar */
.app-header {
  height: var(--header-height);
  background: var(--bg-panel);
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  z-index: 50;
  flex-shrink: 0;
}

.brand-section {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text-primary);
}

.logo-icon {
  width: 32px;
  height: 32px;
  background: var(--accent-primary);
  border-radius: var(--radius-xs);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  box-shadow: var(--shadow-sm);
  flex-shrink: 0;
}

.brand-title {
  font-family: var(--font-brand);
  font-style: normal;
  font-size: 21px;
  font-weight: 700;
  letter-spacing: -0.025em;
  color: var(--text-primary);
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.brand-badge {
  font-family: var(--font-sans);
  font-style: normal;
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 2px 7px;
  background: var(--bg-panel-hover);
  color: var(--accent-primary);
  border-radius: var(--radius-xs);
  border: 1px solid var(--border-medium);
}

.header-center-tools {
  display: flex;
  align-items: center;
  gap: 4px;
  background: var(--bg-panel-hover);
  padding: 3px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-medium);
}

.tool-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 600;
  transition: var(--transition-fast);
}

.tool-btn:hover:not(:disabled) {
  background: rgba(255, 255, 255, 0.75);
  color: var(--text-primary);
}

.tool-btn.active {
  background: var(--bg-panel);
  color: var(--text-primary);
  box-shadow: var(--shadow-sm);
}

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

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn-secondary {
  background: var(--bg-panel);
  color: var(--text-primary);
  border: 1px solid var(--border-strong);
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
  background: var(--bg-panel-hover);
  border-color: var(--accent-primary);
  color: var(--accent-primary);
}

.btn-primary {
  background: var(--accent-primary);
  color: white;
  border: 1px solid var(--accent-primary);
  box-shadow: 0 2px 6px rgba(93, 93, 68, 0.25);
}

.btn-primary:hover {
  background: var(--accent-primary-hover);
  border-color: var(--accent-primary-hover);
  box-shadow: 0 4px 12px rgba(93, 93, 68, 0.35);
}

.btn-dark {
  background: var(--color-dark);
  color: white;
  border: 1px solid var(--color-dark);
}

.btn-dark:hover {
  background: var(--color-dark-hover);
  border-color: var(--color-dark-hover);
}

.btn-sm {
  padding: 6px 12px;
  font-size: 12px;
}

.btn-icon {
  width: 34px;
  height: 34px;
  padding: 0;
  border-radius: var(--radius-sm);
}

/* Main Container Layout */
.app-body {
  display: flex;
  flex: 0 0 auto;
  width: 100%;
  height: 640px;
  min-height: 520px;
  max-height: 800px;
  overflow: hidden;
  position: relative;
  background: var(--bg-workspace);
  border-bottom: 1px solid var(--border-medium);
}

/* Tooltip / Keyboard shortcut badge */
.kbd-shortcut {
  font-size: 10px;
  font-family: var(--font-mono);
  background: var(--bg-panel-hover);
  border: 1px solid var(--border-medium);
  padding: 1px 5px;
  border-radius: 3px;
  margin-left: 4px;
  color: var(--text-muted);
}

/* Site Footer */
.site-footer {
  background: var(--bg-panel);
  border-top: 1px solid var(--border-medium);
  padding: 56px 24px 32px;
  color: var(--text-primary);
  margin-top: auto;
  position: relative;
  z-index: 10;
}

.footer-container {
  max-width: 1080px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 40px;
}

.footer-top-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1.2fr;
  gap: 48px;
}

.footer-brand-col {
  display: flex;
  flex-direction: column;
  gap: 14px;
  max-width: 380px;
}

.footer-brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text-primary);
}

.footer-tagline {
  font-size: 14px;
  line-height: 1.6;
  color: var(--text-secondary);
}

.footer-nav-col {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.footer-col-heading {
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
}

.footer-link-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-link {
  font-size: 14px;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.footer-link:hover {
  color: var(--accent-primary);
}

.footer-email-link {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--accent-primary);
  font-weight: 500;
}

.footer-bottom-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 24px;
  border-top: 1px solid var(--border-subtle);
  font-size: 13px;
  color: var(--text-muted);
  flex-wrap: wrap;
  gap: 16px;
}

.footer-copyright {
  margin: 0;
}

.footer-legal-links {
  display: flex;
  align-items: center;
  gap: 12px;
}

.footer-legal-link {
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-legal-link:hover {
  color: var(--text-primary);
}

.footer-divider {
  color: var(--border-strong);
}

@media (max-width: 880px) {
  .site-footer {
    padding: 40px 20px 84px; /* extra bottom padding for mobile bottom bar */
  }

  .footer-top-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .footer-bottom-bar {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }
}