@import 'variables.css';

/* Reset & Box Sizing */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  color-scheme: var(--color-scheme);
  overflow-x: clip;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-body);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: clip;
  position: relative;
  -webkit-font-smoothing: antialiased;
  transition: background-color 0.25s ease, color 0.25s ease;
}

/* Subtle, Modern Minimal Background */
.ambient-bg {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
  opacity: 0.6;
}

.ambient-subtle-glow {
  position: absolute;
  top: -150px;
  left: 50%;
  transform: translateX(-50%);
  width: 900px;
  height: 400px;
  max-width: 100vw;
  background: radial-gradient(ellipse at center, var(--primary-glow) 0%, transparent 70%);
  filter: blur(80px);
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 7px;
  height: 7px;
}

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

::-webkit-scrollbar-thumb {
  background: var(--border-medium);
  border-radius: var(--radius-full);
}

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

/* App Container - Fluid up to Ultra-Wide (1600px) */
.app-wrapper {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 1560px;
  margin: 0 auto;
  padding: 0 2rem 3rem 2rem;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* Header Navbar */
.site-header {
  padding: 1.25rem 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-subtle);
  margin-bottom: 2rem;
  gap: 1rem;
  flex-wrap: wrap;
}

.brand-wrapper {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  flex-shrink: 0;
}

.brand-icon-box {
  width: 40px;
  height: 40px;
  background: var(--primary);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-sm);
  color: white;
  flex-shrink: 0;
}

.brand-icon-box svg {
  width: 22px;
  height: 22px;
}

.brand-title {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  white-space: nowrap;
}

.brand-badge {
  font-size: 0.65rem;
  font-family: var(--font-body);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 0.18rem 0.55rem;
  border-radius: var(--radius-full);
  background: var(--primary-light);
  border: 1px solid rgba(79, 70, 229, 0.3);
  color: var(--primary);
}

/* Hamburger Toggle Button (Hidden on Desktop) */
.btn-hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: var(--bg-card);
  border: 1px solid var(--border-medium);
  cursor: pointer;
  padding: 0;
  gap: 5px;
  transition: all var(--transition-fast);
  z-index: 102;
  box-shadow: var(--shadow-sm);
}

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

.btn-hamburger .hamburger-bar {
  display: block;
  width: 20px;
  height: 2px;
  background-color: var(--text-primary);
  border-radius: 2px;
  transition: transform 0.25s ease, opacity 0.25s ease;
}

/* Morph 3 bars to X when active */
.btn-hamburger.active .hamburger-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.btn-hamburger.active .hamburger-bar:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.btn-hamburger.active .hamburger-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

@keyframes menuSlideDown {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  flex-wrap: wrap;
}

/* Theme Switcher Segmented Control */
.theme-switcher-wrapper {
  display: flex;
  align-items: center;
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  padding: 3px;
  gap: 2px;
}

.theme-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 30px;
  border-radius: var(--radius-full);
  border: none;
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--transition-fast);
}

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

.theme-btn:hover {
  color: var(--text-primary);
}

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

/* Header Buttons */
.btn-nav {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1.05rem;
  border-radius: var(--radius-md);
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn-nav:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-medium);
  transform: translateY(-1px);
}

.btn-nav-primary {
  background: var(--primary);
  border: 1px solid transparent;
  color: #ffffff;
}

.btn-nav-primary:hover {
  background: var(--primary-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.badge-count {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.25);
  color: white;
  border-radius: var(--radius-full);
  padding: 0.1rem 0.45rem;
  font-size: 0.72rem;
  font-weight: 700;
}

/* ========================================================
   MAIN RESPONSIVE GRID LAYOUT
   ======================================================== */
.main-content-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(360px, 440px);
  gap: 2rem;
  align-items: stretch;
}

.generator-left-panel,
.generator-right-panel {
  min-width: 0; /* Prevents overflow in grid items */
}

.generator-right-panel {
  height: 100%;
  position: relative;
}

.preview-sticky-wrapper {
  position: -webkit-sticky;
  position: sticky;
  top: 1.5rem;
  z-index: 20;
}

/* Section Headings */
.page-hero {
  margin-bottom: 1.75rem;
}

.page-hero h1 {
  font-family: var(--font-display);
  font-size: 2.1rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.25;
  margin-bottom: 0.4rem;
  color: var(--text-primary);
}

.gradient-text {
  color: var(--primary);
}

.page-hero p {
  color: var(--text-secondary);
  font-size: 1rem;
  max-width: 760px;
}

/* Footer */
.site-footer {
  margin-top: auto;
  padding-top: 2.5rem;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--text-muted);
  font-size: 0.85rem;
  flex-wrap: wrap;
  gap: 1rem;
}

.site-footer a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.site-footer a:hover {
  color: var(--primary);
}

/* ========================================================
   MEDIA QUERIES - FULLY RESPONSIVE (LARGE & MOBILE)
   ======================================================== */

/* Large Displays / Zoomed Out (1400px+) */
@media (min-width: 1400px) {
  .main-content-grid {
    grid-template-columns: minmax(0, 1.2fr) minmax(400px, 460px);
    gap: 2.5rem;
  }
  .page-hero h1 {
    font-size: 2.35rem;
  }
}

/* Tablet & Moderate Zoom (992px to 1180px) */
@media (max-width: 1180px) {
  .main-content-grid {
    grid-template-columns: minmax(0, 1fr) 380px;
    gap: 1.5rem;
  }
}

/* Mobile & Tablet Portrait (< 992px) */
@media (max-width: 992px) {
  .app-wrapper {
    padding: 0 1.25rem 2.5rem 1.25rem;
  }

  .main-content-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  /* CRITICAL UX: Place Preview Card above forms on mobile */
  .generator-right-panel {
    order: -1;
  }

  .preview-sticky-wrapper {
    position: static;
  }

  .preview-card {
    padding: 1.5rem 1.25rem;
  }

  .page-hero {
    margin-bottom: 1.25rem;
  }

  .page-hero h1 {
    font-size: 1.75rem;
  }
}

/* Responsive Navbar Hamburger Drawer (< 860px) */
@media (max-width: 860px) {
  .btn-hamburger {
    display: flex;
  }

  .site-header {
    flex-direction: row !important;
    align-items: center;
    justify-content: space-between;
    position: relative;
    flex-wrap: nowrap;
    margin-bottom: 1.5rem;
  }

  .header-actions {
    display: none;
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    width: 290px;
    max-width: calc(100vw - 2rem);
    background: var(--bg-card);
    backdrop-filter: var(--glass-blur-lg);
    -webkit-backdrop-filter: var(--glass-blur-lg);
    border: 1px solid var(--border-medium);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    padding: 1.15rem;
    flex-direction: column;
    align-items: stretch;
    gap: 0.85rem;
    z-index: 1000;
  }

  .header-actions.active {
    display: flex;
    animation: menuSlideDown 0.22s cubic-bezier(0.16, 1, 0.3, 1) forwards;
  }

  .header-actions .theme-switcher-wrapper {
    width: 100%;
    justify-content: space-around;
    padding: 4px;
    background: var(--bg-input);
  }

  .header-actions .theme-btn {
    flex: 1;
    height: 36px;
  }

  .header-actions .btn-google,
  .header-actions .btn-nav {
    width: 100%;
    justify-content: center;
    padding: 0.75rem 1rem;
    font-size: 0.9rem;
  }

  .header-actions .user-profile-box {
    width: 100%;
    justify-content: space-between;
    padding: 0.5rem 0.75rem;
  }
}

/* Small Mobile Screens (< 640px) */
@media (max-width: 640px) {
  .app-wrapper {
    padding: 0 0.85rem 2rem 0.85rem;
  }

  .page-hero h1 {
    font-size: 1.5rem;
  }

  .page-hero p {
    font-size: 0.88rem;
  }

  .glass-panel {
    padding: 1.25rem 0.85rem;
    border-radius: var(--radius-lg);
  }

  .preview-card {
    padding: 1.25rem 0.85rem;
    border-radius: var(--radius-lg);
  }

  .qr-frame-outer {
    padding: 0.75rem;
  }

  #qr-canvas-container canvas, 
  #qr-canvas-container svg {
    max-width: 220px !important;
  }

  .download-actions-grid {
    grid-template-columns: 1fr;
  }

  .site-footer {
    flex-direction: column;
    text-align: center;
    gap: 0.5rem;
  }
}