/* ========================================
   SAAS LANDING PAGE TEMPLATE
   Design System & Custom Styles
   ======================================== */

/* ===== CSS CUSTOM PROPERTIES (THEMING) ===== */
:root {
  /* Primary Brand Colors — Blue (Default) */
  --primary-50:  #eff6ff;
  --primary-100: #dbeafe;
  --primary-200: #bfdbfe;
  --primary-300: #93c5fd;
  --primary-400: #60a5fa;
  --primary-500: #3b82f6;
  --primary-600: #2563eb;
  --primary-700: #1d4ed8;
  --primary-800: #1e40af;
  --primary-900: #1e3a8a;

  /* Surfaces */
  --bg-primary:    #ffffff;
  --bg-secondary:  #f9fafb;
  --bg-tertiary:   #f3f4f6;
  --bg-inverse:    #111827;

  /* Text */
  --text-primary:   #111827;
  --text-secondary: #4b5563;
  --text-tertiary:  #9ca3af;
  --text-inverse:   #f9fafb;

  /* Borders */
  --border-default: #e5e7eb;
  --border-hover:   #d1d5db;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0,0,0,0.05);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -2px rgba(0,0,0,0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -4px rgba(0,0,0,0.04);
  --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.08), 0 8px 10px -6px rgba(0,0,0,0.04);

  /* Radii */
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-2xl: 24px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);

  /* Navbar height */
  --nav-height: 72px;
}

/* ===== DARK MODE ===== */
[data-theme="dark"] {
  --bg-primary:    #0b1120;
  --bg-secondary:  #111827;
  --bg-tertiary:   #1f2937;
  --bg-inverse:    #f9fafb;

  --text-primary:   #f1f5f9;
  --text-secondary: #94a3b8;
  --text-tertiary:  #64748b;
  --text-inverse:   #111827;

  --border-default: #1e293b;
  --border-hover:   #334155;

  --shadow-sm: 0 1px 2px 0 rgba(0,0,0,0.3);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.4), 0 2px 4px -2px rgba(0,0,0,0.3);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.4), 0 4px 6px -4px rgba(0,0,0,0.3);
  --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.4), 0 8px 10px -6px rgba(0,0,0,0.3);
}

/* ===== GLOBAL OVERRIDES ===== */
body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  transition: background-color var(--transition-base), color var(--transition-base);
}

::selection {
  background-color: var(--primary-500);
  color: #ffffff;
}

/* ===== SCROLL BEHAVIOR ===== */
html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-height);
}

/* ===== NAVBAR ===== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  height: var(--nav-height);
  transition: all var(--transition-base);
}

.navbar.scrolled {
  background-color: var(--bg-primary);
  border-bottom: 1px solid var(--border-default);
  box-shadow: var(--shadow-sm);
}

[data-theme="dark"] .navbar.scrolled {
  background-color: rgba(11, 17, 32, 0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.navbar__logo-text {
  background: linear-gradient(135deg, var(--primary-500), var(--primary-700));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Mobile nav overlay */
.mobile-nav {
  position: fixed;
  inset: 0;
  z-index: 40;
  background-color: var(--bg-primary);
  transform: translateX(100%);
  transition: transform var(--transition-base);
}

.mobile-nav.open {
  transform: translateX(0);
}

/* ===== HERO ===== */
.hero {
  position: relative;
  overflow: hidden;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background-color: var(--bg-primary);
}

.hero__gradient {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 50% 0%, var(--primary-100) 0%, transparent 60%);
  opacity: 0.6;
  pointer-events: none;
}

[data-theme="dark"] .hero__gradient {
  background:
    radial-gradient(ellipse 80% 60% at 50% 0%, var(--primary-900) 0%, transparent 60%);
  opacity: 0.4;
}

.hero__glow {
  position: absolute;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: var(--primary-500);
  opacity: 0.08;
  filter: blur(120px);
  top: -200px;
  right: -100px;
  pointer-events: none;
}

[data-theme="dark"] .hero__glow {
  opacity: 0.12;
}

/* ===== LOGO MARQUEE ===== */
.marquee {
  overflow: hidden;
  -webkit-mask-image: linear-gradient(to right, transparent, black 15%, black 85%, transparent);
  mask-image: linear-gradient(to right, transparent, black 15%, black 85%, transparent);
}

.marquee__track {
  display: flex;
  gap: 3rem;
  animation: marquee 30s linear infinite;
  width: max-content;
}

@keyframes marquee {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

.marquee__logo {
  opacity: 0.4;
  transition: opacity var(--transition-base);
  filter: grayscale(100%);
  flex-shrink: 0;
}

.marquee__logo:hover {
  opacity: 0.8;
  filter: grayscale(0%);
}

[data-theme="dark"] .marquee__logo {
  opacity: 0.3;
  filter: grayscale(100%) brightness(2);
}

[data-theme="dark"] .marquee__logo:hover {
  opacity: 0.7;
  filter: grayscale(0%) brightness(1.2);
}

/* ===== FEATURE CARDS ===== */
.feature-card {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-xl);
  padding: 2rem;
  transition: all var(--transition-base);
}

.feature-card:hover {
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-200);
  transform: translateY(-2px);
}

[data-theme="dark"] .feature-card:hover {
  border-color: var(--primary-800);
}

.feature-card__icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-lg);
  background-color: var(--primary-50);
  color: var(--primary-600);
}

[data-theme="dark"] .feature-card__icon {
  background-color: color-mix(in srgb, var(--primary-500) 10%, transparent);
  color: var(--primary-400);
}

/* ===== BENTO GRID ===== */
.bento-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: auto auto;
  gap: 1.5rem;
}

.bento-grid__item--wide {
  grid-column: span 2;
}

.bento-grid__item--tall {
  grid-row: span 2;
}

/* ===== STATS COUNTER ===== */
.stat-number {
  font-variant-numeric: tabular-nums;
}

/* ===== TESTIMONIAL CARDS ===== */
.testimonial-card {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-xl);
  padding: 1.5rem;
  transition: all var(--transition-base);
}

.testimonial-card:hover {
  box-shadow: var(--shadow-md);
}

.testimonial-stars {
  color: #f59e0b;
}

/* ===== PRICING ===== */
.pricing-card {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-2xl);
  padding: 2rem;
  transition: all var(--transition-base);
  position: relative;
}

.pricing-card--featured {
  border-color: var(--primary-500);
  box-shadow: 0 0 0 1px var(--primary-500), var(--shadow-xl);
}

.pricing-toggle {
  position: relative;
  width: 52px;
  height: 28px;
  border-radius: var(--radius-full);
  background-color: var(--border-default);
  cursor: pointer;
  transition: background-color var(--transition-base);
}

.pricing-toggle.active {
  background-color: var(--primary-500);
}

.pricing-toggle__dot {
  position: absolute;
  top: 3px;
  left: 3px;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background-color: #fff;
  transition: transform var(--transition-base);
  box-shadow: var(--shadow-sm);
}

.pricing-toggle.active .pricing-toggle__dot {
  transform: translateX(24px);
}

.pricing-check {
  color: var(--primary-500);
}

/* ===== FAQ ACCORDION ===== */
.faq-item {
  border-bottom: 1px solid var(--border-default);
}

.faq-item__answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-slow), padding var(--transition-slow);
}

.faq-item.open .faq-item__answer {
  max-height: 500px;
}

.faq-item__icon {
  transition: transform var(--transition-base);
}

.faq-item.open .faq-item__icon {
  transform: rotate(45deg);
}

/* ===== CTA SECTION ===== */
.cta-section {
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, var(--primary-600), var(--primary-800));
}

.cta-section__glow {
  position: absolute;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: rgba(255,255,255,0.1);
  filter: blur(80px);
  pointer-events: none;
}

/* ===== FOOTER ===== */
.footer {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-default);
}

[data-theme="dark"] .footer {
  background-color: var(--bg-secondary);
}

/* ===== SCROLL ANIMATIONS ===== */
[data-animate] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

[data-animate="fade-up"].animate-in {
  opacity: 1;
  transform: translateY(0);
}

[data-animate="fade-in"].animate-in {
  opacity: 1;
  transform: translateY(0);
}

[data-animate="slide-left"] {
  opacity: 0;
  transform: translateX(-40px);
}

[data-animate="slide-left"].animate-in {
  opacity: 1;
  transform: translateX(0);
}

[data-animate="slide-right"] {
  opacity: 0;
  transform: translateX(40px);
}

[data-animate="slide-right"].animate-in {
  opacity: 1;
  transform: translateX(0);
}

[data-animate="scale-in"] {
  opacity: 0;
  transform: scale(0.95);
}

[data-animate="scale-in"].animate-in {
  opacity: 1;
  transform: scale(1);
}

/* Stagger children */
[data-animate-stagger] > * {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

[data-animate-stagger].animate-in > *:nth-child(1) { transition-delay: 0ms; }
[data-animate-stagger].animate-in > *:nth-child(2) { transition-delay: 80ms; }
[data-animate-stagger].animate-in > *:nth-child(3) { transition-delay: 160ms; }
[data-animate-stagger].animate-in > *:nth-child(4) { transition-delay: 240ms; }
[data-animate-stagger].animate-in > *:nth-child(5) { transition-delay: 320ms; }
[data-animate-stagger].animate-in > *:nth-child(6) { transition-delay: 400ms; }

[data-animate-stagger].animate-in > * {
  opacity: 1;
  transform: translateY(0);
}

/* ===== THEME SWITCHER BUTTON ===== */
.theme-toggle {
  position: relative;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-default);
  background: var(--bg-primary);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-base);
}

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

.theme-toggle__sun,
.theme-toggle__moon {
  position: absolute;
  transition: all var(--transition-base);
}

.theme-toggle__sun {
  opacity: 1;
  transform: rotate(0deg) scale(1);
}

.theme-toggle__moon {
  opacity: 0;
  transform: rotate(-90deg) scale(0.5);
}

[data-theme="dark"] .theme-toggle__sun {
  opacity: 0;
  transform: rotate(90deg) scale(0.5);
}

[data-theme="dark"] .theme-toggle__moon {
  opacity: 1;
  transform: rotate(0deg) scale(1);
}

/* ===== BUTTONS (Custom beyond Tailwind) ===== */
.btn-primary {
  background: var(--primary-600);
  color: #fff;
  transition: all var(--transition-base);
  box-shadow: 0 1px 2px rgba(0,0,0,0.05);
}

.btn-primary:hover {
  background: var(--primary-700);
  box-shadow: 0 4px 12px color-mix(in srgb, var(--primary-600) 35%, transparent);
  transform: translateY(-1px);
}

.btn-secondary {
  background: var(--bg-primary);
  color: var(--text-primary);
  border: 1px solid var(--border-default);
  transition: all var(--transition-base);
}

.btn-secondary:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-sm);
}

/* ===== RESPONSIVE HELPERS ===== */
@media (max-width: 768px) {
  .bento-grid {
    grid-template-columns: 1fr;
  }
  .bento-grid__item--wide {
    grid-column: span 1;
  }
}

@media (max-width: 640px) {
  :root {
    --nav-height: 64px;
  }
}

/* ===== UTILITY: GRADIENT TEXT ===== */
.gradient-text {
  background: linear-gradient(135deg, var(--primary-500), var(--primary-700));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ===== UTILITY: GLASS MORPHISM ===== */
.glass {
  background: rgba(255,255,255,0.6);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(255,255,255,0.3);
}

[data-theme="dark"] .glass {
  background: rgba(15,23,42,0.6);
  border: 1px solid rgba(255,255,255,0.08);
}

/* ===== COLOR THEME SWITCHER WIDGET ===== */
.color-theme-switcher {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 60;
}

.color-theme-switcher__trigger {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--primary-600);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  border: 3px solid var(--bg-primary);
  box-shadow: var(--shadow-lg), 0 0 0 1px var(--border-default);
  transition: all var(--transition-base);
}

.color-theme-switcher__trigger:hover {
  transform: scale(1.1);
  box-shadow: var(--shadow-xl), 0 0 0 1px var(--border-default);
}

.color-theme-switcher__trigger:active {
  transform: scale(0.95);
}

.color-theme-switcher__panel {
  position: absolute;
  bottom: 60px;
  right: 0;
  background: var(--bg-primary);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-xl);
  padding: 12px;
  box-shadow: var(--shadow-xl);
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px) scale(0.95);
  transition: all var(--transition-base);
  min-width: 180px;
}

.color-theme-switcher__panel.open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
}

.color-theme-switcher__label {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-tertiary);
  margin-bottom: 8px;
  padding: 0 4px;
}

.color-theme-switcher__options {
  display: flex;
  gap: 8px;
}

.color-theme-swatch {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  cursor: pointer;
  border: 2px solid transparent;
  transition: all var(--transition-base);
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.color-theme-swatch:hover {
  transform: scale(1.12);
  box-shadow: var(--shadow-md);
}

.color-theme-swatch.active {
  border-color: var(--text-primary);
  box-shadow: 0 0 0 2px var(--bg-primary), 0 0 0 4px var(--text-primary);
}

.color-theme-swatch.active::after {
  content: '';
  width: 10px;
  height: 10px;
  background: #fff;
  border-radius: 50%;
  box-shadow: 0 1px 3px rgba(0,0,0,0.3);
}

.color-theme-swatch--blue   { background: #3b82f6; }
.color-theme-swatch--purple { background: #8b5cf6; }
.color-theme-swatch--green  { background: #10b981; }
.color-theme-swatch--orange { background: #f97316; }

/* ===== DASHBOARD MOCKUP ENHANCEMENTS ===== */
.dashboard-mockup {
  position: relative;
  border-radius: var(--radius-2xl);
  border: 1px solid var(--border-default);
  overflow: hidden;
  background: var(--bg-secondary);
  box-shadow:
    var(--shadow-xl),
    0 0 60px -12px rgba(var(--primary-500), 0.15);
}

[data-theme="dark"] .dashboard-mockup {
  box-shadow:
    var(--shadow-xl),
    0 0 80px -20px color-mix(in srgb, var(--primary-500) 10%, transparent);
}

.dashboard-mockup__titlebar {
  height: 40px;
  background: var(--bg-tertiary);
  border-bottom: 1px solid var(--border-default);
  display: flex;
  align-items: center;
  padding: 0 16px;
  gap: 8px;
}

.dashboard-mockup__dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.dashboard-mockup__body {
  display: flex;
  min-height: 340px;
}

.dashboard-mockup__sidebar {
  width: 200px;
  background: var(--bg-tertiary);
  border-right: 1px solid var(--border-default);
  padding: 16px 12px;
  flex-shrink: 0;
  display: none;
}

@media (min-width: 640px) {
  .dashboard-mockup__sidebar {
    display: block;
  }
}

.dashboard-mockup__content {
  flex: 1;
  padding: 20px;
  overflow: hidden;
}

.dashboard-mockup__sidebar-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  border-radius: var(--radius-md);
  font-size: 12px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
  margin-bottom: 2px;
}

.dashboard-mockup__sidebar-item:hover {
  background: var(--bg-secondary);
}

.dashboard-mockup__sidebar-item--active {
  background: var(--primary-50);
  color: var(--primary-700);
}

[data-theme="dark"] .dashboard-mockup__sidebar-item--active {
  background: color-mix(in srgb, var(--primary-500) 10%, transparent);
  color: var(--primary-400);
}

/* Shimmer animation for dashboard skeleton */
@keyframes shimmer {
  0%   { background-position: -200px 0; }
  100% { background-position: calc(200px + 100%) 0; }
}

.dashboard-shimmer {
  background: linear-gradient(90deg, var(--bg-tertiary) 25%, var(--border-default) 50%, var(--bg-tertiary) 75%);
  background-size: 200px 100%;
  animation: shimmer 2s ease-in-out infinite;
}

/* Mini chart bars animation */
@keyframes chartGrow {
  from { transform: scaleY(0); }
  to   { transform: scaleY(1); }
}

.chart-bar {
  transform-origin: bottom;
  animation: chartGrow 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
  animation-play-state: paused;
}

.animate-in .chart-bar {
  animation-play-state: running;
}

.chart-bar:nth-child(1)  { animation-delay: 0.1s; }
.chart-bar:nth-child(2)  { animation-delay: 0.15s; }
.chart-bar:nth-child(3)  { animation-delay: 0.2s; }
.chart-bar:nth-child(4)  { animation-delay: 0.25s; }
.chart-bar:nth-child(5)  { animation-delay: 0.3s; }
.chart-bar:nth-child(6)  { animation-delay: 0.35s; }
.chart-bar:nth-child(7)  { animation-delay: 0.4s; }
.chart-bar:nth-child(8)  { animation-delay: 0.45s; }
.chart-bar:nth-child(9)  { animation-delay: 0.5s; }
.chart-bar:nth-child(10) { animation-delay: 0.55s; }
.chart-bar:nth-child(11) { animation-delay: 0.6s; }
.chart-bar:nth-child(12) { animation-delay: 0.65s; }

/* ===== IMPROVED SECTION TRANSITIONS ===== */
section {
  transition: background-color var(--transition-base);
}

/* ===== DARK MODE — PRICING CARD FEATURED ===== */
[data-theme="dark"] .pricing-card--featured {
  background: linear-gradient(135deg, color-mix(in srgb, var(--primary-500) 5%, transparent) 0%, color-mix(in srgb, var(--primary-500) 2%, transparent) 100%);
  border-color: var(--primary-500);
}

/* ===== DARK MODE — CTA SECTION ===== */
[data-theme="dark"] .cta-section {
  background: linear-gradient(135deg, var(--primary-800), var(--primary-900));
}

/* ===== DARK MODE — TESTIMONIAL CARD ===== */
[data-theme="dark"] .testimonial-card {
  background-color: var(--bg-secondary);
}

[data-theme="dark"] .testimonial-card:hover {
  border-color: var(--border-hover);
}

/* ===== DARK MODE — PRICING CARD ===== */
[data-theme="dark"] .pricing-card {
  background-color: var(--bg-secondary);
}

/* ===== DARK MODE — FAQ ===== */
[data-theme="dark"] .faq-item button:hover {
  color: var(--primary-400);
}

/* ===== LINK HOVER UNDERLINE UTILITY ===== */
.link-underline {
  position: relative;
}

.link-underline::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary-500);
  transition: width var(--transition-base);
}

.link-underline:hover::after {
  width: 100%;
}

/* ===== FOCUS VISIBLE STYLES ===== */
:focus-visible {
  outline: 2px solid var(--primary-500);
  outline-offset: 2px;
  border-radius: 4px;
}

/* ===== SMOOTH COLOR THEME TRANSITION ===== */
.theme-transitioning,
.theme-transitioning *,
.theme-transitioning *::before,
.theme-transitioning *::after {
  transition: background-color 0.4s ease, border-color 0.4s ease, color 0.4s ease, box-shadow 0.4s ease, fill 0.4s ease, stroke 0.4s ease !important;
}