/* --- Design System & CSS Variables --- */
:root {
  --font-sans: 'Plus Jakarta Sans', system-ui, sans-serif;
  --font-mono: 'Fira Code', monospace;
  
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  
  --transition-fast: 0.15s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-normal: 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 10px 35px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 20px 50px rgba(0, 0, 0, 0.15);
}

/* --- Dark Theme Variables --- */
body.dark-theme {
  --bg-app: #06070a;
  --bg-panel: #0d0f15;
  --bg-card: rgba(19, 21, 30, 0.6);
  --bg-card-hover: rgba(26, 29, 41, 0.85);
  --bg-input: #12141f;
  --border-color: rgba(255, 255, 255, 0.07);
  --border-hover: rgba(255, 255, 255, 0.15);
  
  --text-primary: #eff1f5;
  --text-secondary: #9aa0b2;
  --text-muted: #5e6375;
  
  --accent-color: #3b82f6;
  --accent-color-hover: #2563eb;
  --accent-gradient: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
  --accent-glow: rgba(59, 130, 246, 0.2);
  
  --toast-bg: rgba(13, 15, 22, 0.95);
  --toast-border: rgba(59, 130, 246, 0.3);
  --color-success: #10b981;
}

/* --- Light Theme Variables --- */
body.light-theme {
  --bg-app: #f0f2f5;
  --bg-panel: #ffffff;
  --bg-card: rgba(239, 241, 244, 0.8);
  --bg-card-hover: rgba(239, 241, 244, 1);
  --bg-input: #ffffff;
  --border-color: rgba(0, 0, 0, 0.08);
  --border-hover: rgba(0, 0, 0, 0.15);
  
  --text-primary: #1f2937;
  --text-secondary: #4b5563;
  --text-muted: #9ca3af;
  
  --accent-color: #2563eb;
  --accent-color-hover: #1d4ed8;
  --accent-gradient: linear-gradient(135deg, #2563eb 0%, #1e40af 100%);
  --accent-glow: rgba(37, 99, 235, 0.15);
  
  --toast-bg: rgba(255, 255, 255, 0.95);
  --toast-border: rgba(37, 99, 235, 0.2);
  --color-success: #059669;
}

/* --- Reset & Layout --- */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-app);
  color: var(--text-primary);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition: background-color var(--transition-normal), color var(--transition-normal);
  overflow: hidden; /* App view is a viewport desktop workspace */
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-app);
}

::-webkit-scrollbar-thumb {
  background: var(--text-muted);
  border-radius: 99px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-secondary);
}

.app-container {
  width: 100%;
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  height: 100vh;
  min-height: 0;
}

/* --- Header Controls --- */
.app-header {
  display: grid;
  grid-template-columns: 1fr 1.8fr 1.2fr;
  align-items: center;
  gap: 1.5rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border-color);
}

@media (max-width: 1100px) {
  .app-header {
    grid-template-columns: 1fr;
    gap: 1rem;
    padding-bottom: 1rem;
  }
}

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

.logo-icon-wrapper {
  background: var(--accent-gradient);
  color: white;
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  box-shadow: 0 4px 12px var(--accent-glow);
}

.logo-icon {
  width: 18px;
  height: 18px;
}

.header-logo-wrapper h1 {
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.subtitle {
  color: var(--text-secondary);
  font-size: 0.75rem;
}

/* URL Input Bar */
.url-control-bar {
  display: flex;
  gap: 0.5rem;
  width: 100%;
}

.url-input-wrapper {
  display: flex;
  align-items: center;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 0.55rem 0.85rem;
  gap: 0.5rem;
  flex-grow: 1;
  transition: border-color var(--transition-fast);
}

.url-input-wrapper:focus-within {
  border-color: var(--accent-color);
}

.url-input-wrapper input {
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-primary);
  font-size: 0.875rem;
  width: 100%;
  font-family: var(--font-sans);
}

.globe-icon {
  color: var(--text-muted);
  width: 16px;
  height: 16px;
}

/* View Adjustments Group */
.view-settings-bar {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 1.25rem;
}

@media (max-width: 1100px) {
  .view-settings-bar {
    justify-content: flex-start;
  }
}

/* Zoom Slider */
.scale-tool {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.scale-tool label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-secondary);
  display: flex;
  gap: 0.35rem;
  white-space: nowrap;
}

.badge {
  background: var(--accent-color);
  color: white;
  padding: 1px 6px;
  border-radius: 99px;
  font-size: 0.7rem;
  font-weight: 700;
}

.scale-tool input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 120px;
  height: 4px;
  background: var(--border-color);
  border-radius: 99px;
  outline: none;
}

.scale-tool input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent-color);
  cursor: pointer;
  transition: transform var(--transition-fast);
}

.scale-tool input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.2);
}

/* Toggle controls */
.toggle-group {
  display: flex;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 3px;
}

.toggle-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  padding: 0.4rem 0.65rem;
  border-radius: 6px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.toggle-btn.active {
  background: var(--bg-input);
  color: var(--accent-color);
  box-shadow: var(--shadow-sm);
}

.toggle-btn svg {
  width: 16px;
  height: 16px;
}

/* Theme Button */
.theme-toggle-btn {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.theme-toggle-btn:hover {
  background: var(--bg-card-hover);
}

body.dark-theme .sun-icon,
body.light-theme .moon-icon {
  display: block;
}

body.dark-theme .moon-icon,
body.light-theme .sun-icon {
  display: none;
}

.theme-toggle-btn svg {
  width: 16px;
  height: 16px;
}

/* --- Common Button Styles --- */
.btn {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 0.85rem;
  padding: 0.55rem 1rem;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  transition: all var(--transition-fast);
}

.btn-primary {
  background: var(--accent-gradient);
  color: white;
  box-shadow: 0 4px 10px var(--accent-glow);
}

.btn-primary:hover {
  filter: brightness(1.05);
  transform: translateY(-1px);
}

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

.btn-secondary:hover {
  background: var(--bg-card-hover);
  color: var(--text-primary);
}

.btn-icon-only {
  padding: 0.55rem;
}

.btn-icon-only svg {
  width: 16px;
  height: 16px;
}

.btn-icon {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 4px;
  transition: all var(--transition-fast);
}

.btn-icon:hover {
  color: var(--text-primary);
  background: var(--bg-input);
}

.btn-icon svg {
  width: 14px;
  height: 14px;
}

/* --- Info Banner --- */
.info-status-banner {
  background: rgba(59, 130, 246, 0.08);
  border: 1px solid rgba(59, 130, 246, 0.15);
  border-radius: var(--radius-sm);
  padding: 0.5rem 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.info-icon {
  color: var(--accent-color);
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

.info-text {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.info-text code {
  font-family: var(--font-mono);
  background: rgba(0, 0, 0, 0.25);
  padding: 1px 4px;
  border-radius: 3px;
}

/* --- Main Workspace --- */
.app-main {
  flex-grow: 1;
  overflow: auto;
  min-height: 0;
  display: flex;
  align-items: stretch;
}

/* Viewports Workspace horizontal container */
.viewports-workspace {
  display: flex;
  gap: 1.5rem;
  padding: 1rem 0 2rem 0;
  align-items: start;
}

/* --- Device viewports Cards --- */
.device-card {
  --scale-factor: 0.5; /* Overwritten dynamically by JS */
  --device-width: 375px;
  --device-height: 700px;
  
  display: flex;
  flex-direction: column;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  transition: width var(--transition-normal), min-width var(--transition-normal);
  
  /* Container width is scaled down! */
  width: calc(var(--device-width) * var(--scale-factor));
  min-width: max(180px, calc(var(--device-width) * var(--scale-factor)));
  
  overflow: hidden;
  backdrop-filter: blur(10px);
}

.device-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.5rem 0.75rem;
  background: rgba(0, 0, 0, 0.15);
  border-bottom: 1px solid var(--border-color);
}

.device-title {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.75rem;
  font-weight: 600;
}

.device-title svg {
  width: 14px;
  height: 14px;
  color: var(--accent-color);
}

.res-badge {
  font-size: 0.65rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
  background: rgba(0, 0, 0, 0.2);
  padding: 1px 4px;
  border-radius: 3px;
}

.device-actions {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

/* Spinner loader */
.loader {
  width: 12px;
  height: 12px;
  border: 2px solid var(--text-muted);
  border-top-color: var(--accent-color);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  display: inline-block;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Viewport scaling logic container */
.iframe-container {
  width: calc(var(--device-width) * var(--scale-factor));
  height: calc(var(--device-height) * var(--scale-factor));
  position: relative;
  overflow: hidden;
  background: #ffffff;
  transition: width var(--transition-normal), height var(--transition-normal);
}

/* Scale iframe using CSS Transform */
.device-iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: var(--device-width);
  height: var(--device-height);
  border: none;
  background: #ffffff;
  
  transform: scale(var(--scale-factor));
  transform-origin: top left;
  transition: width var(--transition-normal), height var(--transition-normal), transform var(--transition-normal);
}

/* --- Toast Popups --- */
.toast-container {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  z-index: 9999;
}

.toast {
  background: var(--toast-bg);
  border: 1px solid var(--toast-border);
  color: var(--text-primary);
  border-radius: var(--radius-sm);
  padding: 0.75rem 1.25rem;
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transform: translateY(20px);
  opacity: 0;
  animation: toast-in 0.3s cubic-bezier(0.16, 1, 0.3, 1) forwards;
  backdrop-filter: blur(10px);
}

.toast svg {
  color: var(--color-success);
  width: 16px;
  height: 16px;
}

.toast-message {
  font-size: 0.8rem;
  font-weight: 500;
}

@keyframes toast-in {
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

.toast.fade-out {
  animation: toast-out 0.3s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes toast-out {
  to {
    transform: translateY(10px);
    opacity: 0;
  }
}

/* Utility classes */
.hidden {
  display: none !important;
}