/* --- CORE VARIABLES --- */
:root {
  --bg-color: #ffffff;
  --text-color: #1a1a1a;
  --accent-color: #333333;
  --secondary-text: #666666;
  --toggle-hover: #f0f0f0;
  --transition-speed: 0.3s;

  /* App Specific */
  --pane-bg: #f9f9f9;
  --border-color: #e5e5e5;
  --code-font: "JetBrains Mono", "Menlo", monospace;
  --success-text: #166534;
  --success-bg: #dcfce7;
  --danger-text: #991b1b;
  --danger-bg: #fee2e2;
}

[data-theme="dark"] {
  --bg-color: #0a0a0a;
  --text-color: #f0f0f0;
  --accent-color: #ffffff;
  --secondary-text: #888888;
  --toggle-hover: #2a2a2a;

  /* App Specific */
  --pane-bg: #111111;
  --border-color: #333333;
  --success-text: #86efac;
  --success-bg: #14532d;
  --danger-text: #fca5a5;
  --danger-bg: #7f1d1d;
}

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

body {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-color);
  transition: background-color var(--transition-speed) ease,
    color var(--transition-speed) ease;
  height: 100vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 1rem 2rem;
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

/* HEADER */
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 0.5rem;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 1rem;
}
.logo {
  height: 2rem;
  width: auto;
}

h1 {
  font-weight: 600;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
}

#theme-toggle {
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  border-radius: 50%;
  color: var(--text-color);
  transition: background-color 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
}

#theme-toggle:hover {
  background-color: var(--toggle-hover);
}
.sun-icon,
.moon-icon {
  width: 1.25rem;
  height: 1.25rem;
}

[data-theme="light"] .moon-icon {
  display: block;
}
[data-theme="light"] .sun-icon {
  display: none;
}
[data-theme="dark"] .moon-icon {
  display: none;
}
[data-theme="dark"] .sun-icon {
  display: block;
}

/* INFO BOX */
.info-box {
  border: 1px solid var(--border-color);
  border-radius: 8px;
  background-color: var(--pane-bg);
  overflow: hidden;
  transition: all 0.3s ease;
}

.info-summary {
  padding: 0.75rem 1rem;
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  list-style: none;
  color: var(--secondary-text);
  transition: color 0.2s;
}

.info-summary:hover {
  color: var(--text-color);
}
.info-summary::-webkit-details-marker {
  display: none;
}

.chevron {
  width: 1rem;
  height: 1rem;
  transition: transform 0.3s ease;
}

details[open] .chevron {
  transform: rotate(180deg);
}

.info-content {
  padding: 0 1rem 1rem 1rem;
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--secondary-text);
  border-top: 1px solid transparent;
}

details[open] .info-content {
  border-top-color: var(--border-color);
  padding-top: 1rem;
  animation: slideDown 0.3s ease-out;
}

.info-content p {
  margin-bottom: 0.75rem;
}
.info-content p:last-child {
  margin-bottom: 0;
}

/* MAIN WORKSPACE */
main {
  flex: 1;
  display: flex;
  gap: 1.5rem;
  height: 100%;
  min-height: 0;
  position: relative;
}

.workspace {
  display: flex;
  flex: 1;
  gap: 1.5rem;
  width: 100%;
}

.pane {
  flex: 1;
  display: flex;
  flex-direction: column;
  background-color: var(--pane-bg);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  overflow: hidden;
  transition: background-color var(--transition-speed) ease,
    border-color var(--transition-speed) ease;
}

.pane-header {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--secondary-text);
}

.header-group {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* Badges */
.badge {
  font-size: 0.75rem;
  font-family: var(--code-font);
  background: var(--bg-color);
  padding: 2px 8px;
  border-radius: 6px;
  border: 1px solid var(--border-color);
  white-space: nowrap;
}

.savings-badge {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 6px;
  display: none; /* Hidden by default */
}

.savings-positive {
  background-color: var(--success-bg);
  color: var(--success-text);
}
.savings-negative {
  background-color: var(--danger-bg);
  color: var(--danger-text);
}

/* Editor */
.editor-area {
  flex: 1;
  width: 100%;
  background: transparent;
  border: none;
  resize: none;
  padding: 1rem;
  font-family: var(--code-font);
  font-size: 0.9rem;
  color: var(--text-color);
  outline: none;
  line-height: 1.5;
  white-space: pre;
  overflow-x: auto;
}

.editor-area::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
.editor-area::-webkit-scrollbar-track {
  background: transparent;
}
.editor-area::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 4px;
}

.pane-footer {
  padding: 0.75rem 1rem;
  border-top: 1px solid var(--border-color);
  display: flex;
  gap: 0.75rem;
  background-color: var(--pane-bg);
}

/* Buttons */
.btn {
  padding: 0.5rem 1rem;
  border-radius: 6px;
  font-family: "Inter", sans-serif;
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
}

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

.btn-primary {
  background: var(--text-color);
  color: var(--bg-color);
  border: 1px solid var(--text-color);
}
.btn-primary:hover {
  opacity: 0.9;
}

.icon-btn {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--secondary-text);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 4px;
  border-radius: 4px;
  transition: color 0.2s, background-color 0.2s;
}
.icon-btn:hover {
  color: var(--text-color);
  background-color: var(--toggle-hover);
}
.icon-btn svg {
  width: 1.1rem;
  height: 1.1rem;
}

/* FOOTER */
footer {
  text-align: center;
  font-size: 0.75rem;
  color: var(--secondary-text);
  padding-top: 0.5rem;
  padding-bottom: 0.5rem;
}

.footer-link {
  text-decoration: none;
  color: inherit;
  border-bottom: 1px dotted var(--secondary-text);
  transition: color 0.2s, border-color 0.2s;
}
.footer-link:hover {
  color: var(--text-color);
  border-color: var(--text-color);
}

/* TOAST NOTIFICATION */
.toast {
  position: fixed;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background-color: var(--text-color);
  color: var(--bg-color);
  padding: 0.75rem 1.5rem;
  border-radius: 6px;
  font-size: 0.875rem;
  font-weight: 500;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  opacity: 0;
  transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  z-index: 1000;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.toast.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-5px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 768px) {
  .container {
    padding: 1rem;
  }
  .workspace {
    flex-direction: column;
  }
  .pane {
    min-height: 40vh;
  }
  body {
    overflow: auto;
    height: auto;
  }
  main {
    height: auto;
    display: block;
  }
  .badge {
    display: none;
  }
  .header-group {
    gap: 0.25rem;
  }
}