/**
 * NQR Labs App Template - Styles
 * MIT License - Copyright (c) 2025 NQR
 *
 * Design System:
 * - Background: #04070a (dark blue-black)
 * - Primary accent: #5de1ff (cyan)
 * - Secondary accent: #00ffaa (teal green)
 * - Text: #d7e8ff (light blue-white)
 * - Panel gradient: #0a0f14 → #04070a
 */

/* ============================================================================
   GLOBAL RESET & BASE STYLES
   ============================================================================ */

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

:root {
  color-scheme: dark;

  /* Color Palette */
  --color-bg-primary: #04070a;
  --color-bg-panel: #0a0f14;
  --color-accent-cyan: #5de1ff;
  --color-accent-teal: #00ffaa;
  --color-text-primary: #d7e8ff;
  --color-text-secondary: #8b9cb7;
  --color-border: rgba(93, 225, 255, 0.2);
  --color-button-bg: rgba(93, 225, 255, 0.15);
  --color-button-hover: rgba(93, 225, 255, 0.25);
}

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: var(--color-bg-primary);
  color: var(--color-text-primary);
  overflow: hidden;
  height: 100vh;
  line-height: 1.6;
}

/* ============================================================================
   LAYOUT CONTAINERS
   ============================================================================ */

.container {
  display: flex;
  height: 100vh;
}

/* Split Layout: Control Panel + Preview */
.layout-split {
  flex-direction: row;
}

/* Center Layout: Panels down the middle */
.layout-center {
  flex-direction: column;
  align-items: center;
  overflow-y: auto;
  padding: 40px 20px;
}

/* ============================================================================
   CONTROL PANEL (Sidebar for split layout)
   ============================================================================ */

.control-panel {
  width: 320px;
  background: linear-gradient(180deg, var(--color-bg-panel) 0%, var(--color-bg-primary) 100%);
  border-right: 1px solid var(--color-border);
  overflow-y: auto;
  overflow-x: hidden;
  padding: 20px;
  flex-shrink: 0;
}

.control-panel::-webkit-scrollbar {
  width: 8px;
}

.control-panel::-webkit-scrollbar-track {
  background: rgba(0, 0, 0, 0.2);
}

.control-panel::-webkit-scrollbar-thumb {
  background: rgba(93, 225, 255, 0.3);
  border-radius: 4px;
}

.control-panel::-webkit-scrollbar-thumb:hover {
  background: rgba(93, 225, 255, 0.5);
}

/* ============================================================================
   CENTER PANEL (For center layout)
   ============================================================================ */

.center-panel {
  width: 100%;
  max-width: 800px;
  background: linear-gradient(180deg, var(--color-bg-panel) 0%, var(--color-bg-primary) 100%);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 30px;
  margin-bottom: 40px;
}

/* ============================================================================
   HEADER (Logo, Title, Subtitle)
   ============================================================================ */

header {
  text-align: center;
  margin-bottom: 20px;
  padding-bottom: 15px;
  border-bottom: 1px solid var(--color-border);
}

.logo {
  display: block;
  margin: 0 auto 15px;
  width: 50%;
  max-width: 150px;
  height: auto;
}

h1 {
  font-size: 1.8rem;
  font-weight: 600;
  color: var(--color-accent-cyan);
  margin-bottom: 5px;
  letter-spacing: 0.5px;
}

.subtitle {
  font-size: 0.95rem;
  color: var(--color-text-secondary);
  font-weight: 400;
}

/* ============================================================================
   SECTIONS
   ============================================================================ */

.section {
  margin-bottom: 20px;
  padding: 15px;
  background: rgba(93, 225, 255, 0.03);
  border: 1px solid rgba(93, 225, 255, 0.1);
  border-radius: 6px;
}

.section-title {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-accent-cyan);
  margin-bottom: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* ============================================================================
   BUTTONS
   ============================================================================ */

button {
  background: var(--color-button-bg);
  color: var(--color-text-primary);
  border: 1px solid var(--color-accent-cyan);
  padding: 10px 18px;
  border-radius: 5px;
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 500;
  transition: all 0.2s ease;
  font-family: inherit;
}

button:hover {
  background: var(--color-button-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 8px rgba(93, 225, 255, 0.2);
}

button:active {
  transform: translateY(0);
}

button:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  transform: none;
}

.button-group {
  display: flex;
  gap: 10px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}

.full-width-btn {
  width: 100%;
  margin-bottom: 10px;
}

/* ============================================================================
   FORM CONTROLS
   ============================================================================ */

.control-group {
  margin-bottom: 15px;
}

.control-label {
  display: block;
  font-size: 0.9rem;
  font-weight: 500;
  margin-bottom: 6px;
  color: var(--color-text-primary);
}

input[type="text"],
input[type="number"],
input[type="email"],
input[type="password"],
textarea,
select {
  width: 100%;
  padding: 10px;
  background: rgba(93, 225, 255, 0.05);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  color: var(--color-text-primary);
  font-size: 0.9rem;
  font-family: inherit;
  transition: border-color 0.2s ease, background 0.2s ease;
}

input[type="text"]:focus,
input[type="number"]:focus,
input[type="email"]:focus,
input[type="password"]:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--color-accent-cyan);
  background: rgba(93, 225, 255, 0.1);
}

textarea {
  resize: vertical;
  min-height: 80px;
}

select {
  cursor: pointer;
}

input[type="file"] {
  display: none;
}

/* Checkbox Styling */
input[type="checkbox"] {
  margin-right: 8px;
  cursor: pointer;
}

/* Range Slider */
.range-container {
  display: flex;
  align-items: center;
  gap: 10px;
}

input[type="range"] {
  flex: 1;
  -webkit-appearance: none;
  appearance: none;
  height: 6px;
  background: rgba(93, 225, 255, 0.2);
  border-radius: 3px;
  outline: none;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 16px;
  height: 16px;
  background: var(--color-accent-cyan);
  border-radius: 50%;
  cursor: pointer;
  transition: transform 0.2s ease;
}

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

input[type="range"]::-moz-range-thumb {
  width: 16px;
  height: 16px;
  background: var(--color-accent-cyan);
  border-radius: 50%;
  cursor: pointer;
  border: none;
  transition: transform 0.2s ease;
}

input[type="range"]::-moz-range-thumb:hover {
  transform: scale(1.2);
}

.range-value {
  min-width: 40px;
  text-align: right;
  font-size: 0.9rem;
  color: var(--color-accent-cyan);
  font-weight: 500;
}

.info-hint {
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  margin-top: 4px;
  font-style: italic;
}

/* ============================================================================
   PREVIEW PANEL (Canvas/Output Area)
   ============================================================================ */

.preview-panel {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg-primary);
  position: relative;
  overflow: auto;
}

.preview-panel canvas {
  max-width: 100%;
  max-height: 100%;
  image-rendering: crisp-edges;
}

.preview-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
}

.preview-overlay p {
  color: var(--color-text-secondary);
  font-size: 1.2rem;
}

/* ============================================================================
   FOOTER
   ============================================================================ */

.panel-footer {
  margin-top: 30px;
  padding-top: 15px;
  border-top: 1px solid var(--color-border);
  text-align: center;
  font-size: 0.85rem;
  color: var(--color-text-secondary);
}

.panel-footer a {
  color: var(--color-accent-cyan);
  text-decoration: none;
  transition: color 0.2s ease;
}

.panel-footer a:hover {
  color: var(--color-accent-teal);
  text-decoration: underline;
}

.link-style {
  background: none;
  border: none;
  padding: 0;
  color: var(--color-accent-cyan);
  cursor: pointer;
  text-decoration: none;
  transition: color 0.2s ease;
  font-family: inherit;
  font-size: inherit;
}

.link-style:hover {
  color: var(--color-accent-teal);
  text-decoration: underline;
  transform: none;
  box-shadow: none;
}

/* ============================================================================
   LICENSE MODAL
   ============================================================================ */

.license-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.8);
  z-index: 999;
  backdrop-filter: blur(4px);
}

.license-overlay.show {
  display: block;
}

.license-modal {
  display: none;
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 90%;
  max-width: 600px;
  max-height: 80vh;
  background: linear-gradient(180deg, var(--color-bg-panel) 0%, var(--color-bg-primary) 100%);
  border: 2px solid var(--color-accent-cyan);
  border-radius: 8px;
  z-index: 1000;
  box-shadow: 0 8px 32px rgba(93, 225, 255, 0.3);
}

.license-modal.show {
  display: block;
}

.license-modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px;
  border-bottom: 1px solid var(--color-border);
}

.license-modal-title {
  font-size: 1.3rem;
  color: var(--color-accent-cyan);
  margin: 0;
}

.license-close {
  background: none;
  border: none;
  padding: 0;
  font-size: 2rem;
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: color 0.2s ease;
  line-height: 1;
  font-family: inherit;
}

.license-close:hover {
  color: var(--color-accent-cyan);
  transform: none;
  box-shadow: none;
}

.license-modal-text {
  padding: 20px;
  overflow-y: auto;
  max-height: calc(80vh - 80px);
  white-space: pre-wrap;
  font-family: 'Courier New', monospace;
  font-size: 0.85rem;
  line-height: 1.6;
  color: var(--color-text-primary);
}

.license-modal-text::-webkit-scrollbar {
  width: 8px;
}

.license-modal-text::-webkit-scrollbar-track {
  background: rgba(0, 0, 0, 0.2);
}

.license-modal-text::-webkit-scrollbar-thumb {
  background: rgba(93, 225, 255, 0.3);
  border-radius: 4px;
}

/* ============================================================================
   HELP TEXT / EMPTY STATES
   ============================================================================ */

.help-text {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  padding: 15px;
  text-align: center;
  font-style: italic;
}

/* ============================================================================
   RESPONSIVE DESIGN
   ============================================================================ */

@media (max-width: 768px) {
  .control-panel {
    width: 100%;
    border-right: none;
    border-bottom: 1px solid var(--color-border);
  }

  .layout-split {
    flex-direction: column;
  }

  .preview-panel {
    flex: 1;
    min-height: 300px;
  }

  h1 {
    font-size: 1.5rem;
  }

  .center-panel {
    padding: 20px;
  }
}

/* ============================================================================
   UTILITY CLASSES
   ============================================================================ */

.text-center {
  text-align: center;
}

.mt-10 {
  margin-top: 10px;
}

.mb-10 {
  margin-bottom: 10px;
}

.hidden {
  display: none !important;
}

.visible {
  display: block !important;
}

/* Accessibility: Reduce motion for users who prefer it */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}