/* =========================================
   1. RESET & BASE VARIABLES
   ========================================= */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

:root {
  --base-font-size: 16px;
  --bg-light: #f4f7f6;
  --surface-light: #ffffff;
  --text-light: #1e293b;
  --text-muted-light: #64748b;
  --primary-light: #0033cc;
  --primary-hover-light: #002299;
  --border-light: #cbd5e1;
  --bg-dark: #070e1a;
  --surface-dark: #121e33;
  --text-dark: #f8fafc;
  --text-muted-dark: #94a3b8;
  --primary-dark: #3b82f6;
  --primary-hover-dark: #60a5fa;
  --border-dark: #2a3b5c;
  --trans-fast: 0.2s ease;
  --trans-med: 0.4s ease;
}

body.light-mode {
  --bg-color: var(--bg-light);
  --surface-color: var(--surface-light);
  --text-color: var(--text-light);
  --text-muted: var(--text-muted-light);
  --primary-color: var(--primary-light);
  --primary-hover: var(--primary-hover-light);
  --border-color: var(--border-light);
}

body.dark-mode {
  --bg-color: var(--bg-dark);
  --surface-color: var(--surface-dark);
  --text-color: var(--text-dark);
  --text-muted: var(--text-muted-dark);
  --primary-color: var(--primary-dark);
  --primary-hover: var(--primary-hover-dark);
  --border-color: var(--border-dark);
}

body {
  font-family: "Inter", sans-serif;
  font-size: var(--base-font-size);
  background-color: var(--bg-color);
  color: var(--text-color);
  line-height: 1.5;
  transition:
    background-color var(--trans-fast),
    color var(--trans-fast);
}

/* =========================================
   2. TYPOGRAPHY
   ========================================= */
h1 {
  font-size: 1.953rem;
  font-weight: 800;
  line-height: 1.2;
}
h2 {
  font-size: 1.563rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 1rem;
}
h3 {
  font-size: 1.25rem;
  font-weight: 600;
  line-height: 1.3;
  margin-bottom: 0.5rem;
}
p {
  font-size: 1rem;
  margin-bottom: 1rem;
}
small {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* =========================================
   3. LAYOUT & SCAFFOLDING
   ========================================= */
#app-wrapper {
  max-width: 960px;
  margin: 0 auto;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow-x: hidden;
  background-color: var(--bg-color);
  box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);
}

/* =========================================
   4. HEADER
   ========================================= */
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem;
  background-color: var(--surface-color);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
}
.header-left,
.header-right {
  display: flex;
  align-items: center;
  gap: 1rem;
}
header h1 {
  font-size: 1.25rem;
  margin: 0;
}
.version {
  font-size: 0.8rem;
  color: var(--primary-color);
  vertical-align: super;
}
.icon-btn {
  font-size: 1.25rem;
  cursor: pointer;
  color: var(--text-color);
  transition: color var(--trans-fast);
}
.icon-btn:hover {
  color: var(--primary-color);
}
.icon-btn.disabled {
  color: var(--text-muted);
  cursor: not-allowed;
  opacity: 0.5;
}

/* =========================================
   5. MAIN CONTENT
   ========================================= */
#prompt-container {
  flex: 1;
  overflow-y: auto;
  padding-bottom: 80px;
}
#parameter-list {
  list-style: none;
}
.param-item {
  background-color: var(--surface-color);
  border-bottom: 1px solid var(--border-color);
  transition: background-color var(--trans-fast);
}
.param-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.25rem 1rem;
  cursor: pointer;
}
.param-title-group {
  flex: 1;
}
.param-title {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: 0.25rem;
  display: block;
}
.param-value {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--primary-color);
}
.param-actions {
  display: flex;
  gap: 1.25rem;
  font-size: 1.2rem;
}
.param-item.locked .param-value {
  color: var(--text-color);
}
.param-item.locked .fa-lock-open {
  display: none;
}
.param-item.locked .fa-lock {
  display: inline-block;
  color: var(--primary-color);
}
.param-item:not(.locked) .fa-lock {
  display: none;
}

.param-description-wrapper {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--trans-med);
  background-color: var(--bg-color);
}
.param-item.expanded .param-description-wrapper {
  max-height: 300px;
}
.param-description {
  padding: 1rem;
  font-size: 0.95rem;
  color: var(--text-muted);
  border-top: 1px dashed var(--border-color);
}

/* =========================================
   6. FOOTER CTA
   ========================================= */
footer {
  position: fixed;
  bottom: 0;
  width: 100%;
  max-width: 960px;
  padding: 1rem;
  background: linear-gradient(to top, var(--bg-color) 70%, transparent);
  z-index: 90;
}
#btn-generate {
  width: 100%;
  padding: 1rem;
  font-size: 1.25rem;
  font-weight: 800;
  background-color: var(--primary-color);
  color: #ffffff;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
  transition:
    background-color var(--trans-fast),
    transform var(--trans-fast);
}
#btn-generate:active {
  transform: scale(0.98);
}

/* =========================================
   7. DRAWERS & OVERLAYS
   ========================================= */
#backdrop {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.6);
  z-index: 150;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--trans-fast);
}
#backdrop.visible {
  opacity: 1;
  pointer-events: all;
}
.drawer {
  position: absolute;
  background-color: var(--surface-color);
  z-index: 200;
  box-shadow: 0 0 20px rgba(0, 0, 0, 0.3);
  display: flex;
  flex-direction: column;
  transition: transform var(--trans-med);
}
.drawer-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem;
  border-bottom: 1px solid var(--border-color);
}
.drawer-content {
  padding: 1.5rem 1rem;
  overflow-y: auto;
  flex: 1;
}
.sliding-left {
  top: 0;
  left: 0;
  bottom: 0;
  width: 85%;
  max-width: 400px;
  transform: translateX(-100%);
}
.sliding-left.open {
  transform: translateX(0);
}
.sliding-top {
  top: 0;
  left: 0;
  right: 0;
  max-height: 85vh;
  border-bottom-left-radius: 12px;
  border-bottom-right-radius: 12px;
  transform: translateY(-100%);
}
.sliding-top.open {
  transform: translateY(0);
}

/* =========================================
   8. FORMS, SETTINGS & UTILITIES
   ========================================= */
/* New: Settings Header & Toggle Links */
.settings-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 0.5rem;
}
.settings-header h3 {
  margin: 0;
}
.toggle-links {
  font-size: 0.85rem;
  color: var(--text-muted);
}
.toggle-links a {
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 600;
  padding: 0 4px;
}
.toggle-links a:hover {
  text-decoration: underline;
}

/* Checkboxes */
.setting-row {
  display: flex;
  align-items: center;
  margin-bottom: 1rem;
  font-size: 1.1rem;
}
.setting-row input[type="checkbox"] {
  margin-right: 1rem;
  width: 20px;
  height: 20px;
  accent-color: var(--primary-color);
}

/* QR Code */
.qr-container {
  margin: 2rem 0;
  text-align: center;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-color);
}
#qr-code {
  max-width: 200px;
  border-radius: 8px;
  margin-top: 1rem;
  display: none;
}

/* Camera & Inputs */
.form-layout {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
input[type="text"] {
  width: 100%;
  padding: 1rem;
  font-size: 1rem;
  background-color: var(--bg-color);
  color: var(--text-color);
  border: 1px solid var(--border-color);
  border-radius: 8px;
}
.camera-btn {
  display: inline-block;
  width: 100%;
  padding: 1rem;
  text-align: center;
  background-color: var(--border-color);
  color: var(--text-color);
  border-radius: 8px;
  cursor: pointer;
  font-weight: 600;
}
.primary-btn {
  padding: 1rem;
  background-color: var(--primary-color);
  color: #fff;
  border: none;
  border-radius: 8px;
  font-weight: 800;
  font-size: 1.1rem;
  cursor: pointer;
}
#camera-preview {
  width: 100%;
  border-radius: 8px;
  margin-top: 0.5rem;
  object-fit: cover;
  max-height: 250px;
}

/* Credits */
.credits {
  margin-top: 2rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-color);
  font-size: 0.85rem;
  color: var(--text-muted);
}
.credits a {
  color: var(--primary-color);
  text-decoration: none;
}