/* ==========================================================================
   Solve the Mystery - Promotional Website Styles
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. CSS Custom Properties (Variables)
   -------------------------------------------------------------------------- */
:root {
  /* Primary Colors */
  --color-primary: #1a73e8;
  --color-primary-light: #e8f0fe;
  --color-primary-dark: #1557b0;

  /* Accent Colors */
  --color-success: #34a853;
  --color-warning: #fbbc04;
  --color-error: #ea4335;

  /* Background Colors */
  --color-bg-dark: #121212;
  --color-bg-card: #1e1e1e;
  --color-bg-elevated: #2d2d2d;

  /* Text Colors */
  --color-text-primary: #ffffff;
  --color-text-secondary: #aaaaaa;
  --color-text-muted: #666666;

  /* Border */
  --color-border: #333333;

  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-xxl: 48px;
  --space-3xl: 64px;

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-2xl: 24px;
  --radius-full: 9999px;

  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  --font-size-xs: 12px;
  --font-size-sm: 14px;
  --font-size-md: 16px;
  --font-size-lg: 20px;
  --font-size-xl: 24px;
  --font-size-2xl: 32px;
  --font-size-3xl: 40px;
  --font-size-4xl: 48px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 300ms ease;

  /* Container */
  --container-max: 1200px;
  --container-narrow: 800px;
}

/* --------------------------------------------------------------------------
   2. Reset & Base Styles
   -------------------------------------------------------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-md);
  line-height: 1.6;
  color: var(--color-text-primary);
  background-color: var(--color-bg-dark);
  min-height: 100vh;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-primary-light);
}

ul, ol {
  list-style: none;
}

/* --------------------------------------------------------------------------
   3. Typography
   -------------------------------------------------------------------------- */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.2;
  margin-bottom: var(--space-md);
}

h1 { font-size: var(--font-size-4xl); }
h2 { font-size: var(--font-size-3xl); }
h3 { font-size: var(--font-size-2xl); }
h4 { font-size: var(--font-size-xl); }

p { margin-bottom: var(--space-md); }
.text-center { text-align: center; }
.text-muted { color: var(--color-text-secondary); }

/* --------------------------------------------------------------------------
   4. Layout
   -------------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.container--narrow {
  max-width: var(--container-narrow);
}

.section {
  padding: var(--space-3xl) 0;
}

.section--hero {
  padding: var(--space-3xl) 0 var(--space-xxl);
  min-height: 100vh;
  display: flex;
  align-items: center;
}

/* --------------------------------------------------------------------------
   5. Navigation
   -------------------------------------------------------------------------- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(18, 18, 18, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-md) 0;
}

.nav__content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.nav__logo img {
  height: 40px;
  width: 40px;
  border-radius: var(--radius-md);
}

.nav__logo span {
  font-weight: 600;
  font-size: var(--font-size-lg);
  color: var(--color-text-primary);
}

.nav__logo:hover span {
  color: var(--color-text-primary);
}

.nav__links {
  display: flex;
  gap: var(--space-lg);
}

.nav__links a {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  transition: color var(--transition-fast);
}

.nav__links a:hover {
  color: var(--color-text-primary);
}

.nav__cta {
  display: none;
}

@media (min-width: 768px) {
  .nav__cta {
    display: block;
  }
}

.nav__toggle {
  display: none;
  background: none;
  border: none;
  color: var(--color-text-primary);
  font-size: 24px;
  cursor: pointer;
}

@media (max-width: 767px) {
  .nav__toggle {
    display: block;
  }

  .nav__links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-bg-dark);
    flex-direction: column;
    padding: var(--space-lg);
    border-bottom: 1px solid var(--color-border);
  }

  .nav__links.active {
    display: flex;
  }
}

/* --------------------------------------------------------------------------
   6. Buttons
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-xl);
  font-family: var(--font-family);
  font-size: var(--font-size-md);
  font-weight: 500;
  border-radius: var(--radius-lg);
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
}

.btn--primary {
  background: var(--color-primary);
  color: white;
}

.btn--primary:hover {
  background: var(--color-primary-dark);
  color: white;
}

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

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

.btn--large {
  padding: var(--space-md) var(--space-xl);
  font-size: var(--font-size-md);
  border-radius: var(--radius-lg);
}

.btn--small {
  padding: var(--space-sm) var(--space-md);
  font-size: var(--font-size-sm);
}

.btn-group {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
  justify-content: center;
}

/* --------------------------------------------------------------------------
   7. Hero Section - Two Column Layout
   -------------------------------------------------------------------------- */
.hero {
  padding-top: 100px;
}

.hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xxl);
  align-items: center;
}

@media (min-width: 900px) {
  .hero__grid {
    grid-template-columns: 1fr 1fr;
  }
}

.hero__content {
  text-align: center;
}

@media (min-width: 900px) {
  .hero__content {
    text-align: left;
  }
}

.hero__logo {
  width: 100px;
  height: 100px;
  margin: 0 auto var(--space-lg);
  border-radius: var(--radius-xl);
  box-shadow: 0 8px 32px rgba(26, 115, 232, 0.3);
}

@media (min-width: 900px) {
  .hero__logo {
    margin: 0 0 var(--space-lg) 0;
  }
}

.hero__title {
  font-size: var(--font-size-3xl);
  margin-bottom: var(--space-md);
  color: var(--color-text-primary);
}

@media (min-width: 768px) {
  .hero__title {
    font-size: var(--font-size-4xl);
  }
}

.hero__subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-xl);
  max-width: 500px;
}

@media (min-width: 900px) {
  .hero__subtitle {
    margin-left: 0;
    margin-right: 0;
  }
}

.hero__cta {
  justify-content: center;
}

@media (min-width: 900px) {
  .hero__cta {
    justify-content: flex-start;
  }
}

/* Hero Phone Mockup */
.hero__visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero__phone {
  position: relative;
  max-width: 300px;
}

.hero__phone img {
  border-radius: var(--radius-2xl);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

/* --------------------------------------------------------------------------
   8. Features Section - Improved
   -------------------------------------------------------------------------- */
.features {
  background: var(--color-bg-card);
}

.features__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
  margin-top: var(--space-xxl);
}

@media (min-width: 600px) {
  .features__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.feature-card {
  background: var(--color-bg-elevated);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border);
  padding: var(--space-xl);
  transition: all var(--transition-normal);
}

.feature-card:hover {
  border-color: var(--color-primary);
  transform: translateY(-4px);
}

.feature-card__title {
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-sm);
  color: var(--color-text-primary);
}

.feature-card__description {
  color: var(--color-text-secondary);
  margin-bottom: 0;
  font-size: var(--font-size-sm);
  line-height: 1.6;
}

/* --------------------------------------------------------------------------
   9. How It Works - Onboarding Style
   -------------------------------------------------------------------------- */
.onboarding {
  padding: var(--space-3xl) 0;
}

.onboarding__cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xl);
  margin-top: var(--space-xxl);
}

@media (min-width: 900px) {
  .onboarding__cards {
    grid-template-columns: repeat(3, 1fr);
  }
}

.onboarding-card {
  background: var(--color-bg-card);
  border-radius: var(--radius-2xl);
  overflow: hidden;
  border: 1px solid var(--color-border);
  transition: all var(--transition-normal);
}

.onboarding-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.onboarding-card__image {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
}

.onboarding-card__content {
  padding: var(--space-xl);
  text-align: center;
}

.onboarding-card__title {
  font-size: var(--font-size-xl);
  margin-bottom: var(--space-sm);
  color: var(--color-text-primary);
}

.onboarding-card__description {
  color: var(--color-text-secondary);
  margin-bottom: 0;
  font-size: var(--font-size-md);
  line-height: 1.7;
}

/* Page indicators */
.onboarding__indicators {
  display: flex;
  justify-content: center;
  gap: var(--space-sm);
  margin-top: var(--space-xl);
}

.indicator {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-border);
}

.indicator--active {
  width: 24px;
  border-radius: var(--radius-full);
  background: var(--color-primary);
}

.indicator--green {
  background: var(--color-success);
}

.indicator--yellow {
  background: var(--color-warning);
}

/* --------------------------------------------------------------------------
   10. Screenshots - Carousel Style
   -------------------------------------------------------------------------- */
/* Screenshot Gallery */
.screenshot-gallery-wrapper {
  position: relative;
  margin-top: var(--space-xxl);
}

.gallery-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 10;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  color: var(--color-text-primary);
  font-size: 28px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.gallery-arrow:hover {
  background: var(--color-primary);
  border-color: var(--color-primary);
}

.gallery-arrow--left {
  left: var(--space-md);
}

.gallery-arrow--right {
  right: var(--space-md);
}

@media (max-width: 767px) {
  .gallery-arrow {
    display: none;
  }
}

.screenshot-gallery {
  overflow-x: auto;
  overflow-y: hidden;
  scrollbar-width: none;
  -ms-overflow-style: none;
  padding: var(--space-md) 0;
  scroll-behavior: smooth;
}

.screenshot-gallery::-webkit-scrollbar {
  display: none;
}

.screenshot-gallery__track {
  display: flex;
  gap: var(--space-lg);
  padding: 0 var(--space-3xl);
  width: max-content;
}

.screenshot-gallery__item {
  flex: 0 0 auto;
  width: 280px;
  text-align: center;
}

.screenshot-gallery__item img {
  width: 100%;
  border-radius: var(--radius-xl);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
  transition: transform var(--transition-normal);
}

.screenshot-gallery__item:hover img {
  transform: scale(1.03);
}

.screenshot-gallery__item span {
  display: block;
  margin-top: var(--space-sm);
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
}

/* --------------------------------------------------------------------------
   11. Download Modal
   -------------------------------------------------------------------------- */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.8);
  z-index: 2000;
  align-items: center;
  justify-content: center;
  padding: var(--space-lg);
}

.modal-overlay.active {
  display: flex;
}

.modal {
  background: var(--color-bg-card);
  border-radius: var(--radius-2xl);
  padding: var(--space-xl);
  max-width: 400px;
  width: 100%;
  border: 1px solid var(--color-border);
  position: relative;
}

.modal--download {
  max-width: 600px;
  text-align: center;
  padding: var(--space-xxl) var(--space-xl);
}

.modal__title {
  font-size: var(--font-size-2xl);
  margin: 0 0 var(--space-sm);
}

.modal__subtitle {
  color: var(--color-text-secondary);
  margin: 0 0 var(--space-xl);
}

.modal__close {
  position: absolute;
  top: var(--space-md);
  right: var(--space-md);
  background: none;
  border: none;
  color: var(--color-text-secondary);
  font-size: 28px;
  cursor: pointer;
  padding: var(--space-sm);
  line-height: 1;
}

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

/* Store Badges */
.store-badges {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--space-lg);
  flex-wrap: wrap;
}

.store-badge {
  display: block;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.store-badge:hover {
  transform: scale(1.05);
  opacity: 0.9;
}

.store-badge img {
  height: 44px;
  width: auto;
}

.store-badge--web {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 14px;
  background: #000;
  border: 1px solid #a6a6a6;
  border-radius: 8px;
  color: #fff;
  height: 44px;
  text-decoration: none;
}

.store-badge--web:hover {
  background: #1a1a1a;
}

.store-badge__web-icon {
  font-size: 24px;
}

.store-badge__web-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.store-badge__web-small {
  font-size: 10px;
  font-weight: 400;
}

.store-badge__web-large {
  font-size: 16px;
  font-weight: 600;
}

@media (max-width: 700px) {
  .store-badges {
    flex-direction: column;
    align-items: center;
  }
}

/* --------------------------------------------------------------------------
   12. Cards
   -------------------------------------------------------------------------- */
.card {
  background: var(--color-bg-card);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  border: 1px solid var(--color-border);
}

/* --------------------------------------------------------------------------
   13. Forms
   -------------------------------------------------------------------------- */
.form-group {
  margin-bottom: var(--space-lg);
}

.form-group label {
  display: block;
  margin-bottom: var(--space-sm);
  font-weight: 500;
  color: var(--color-text-primary);
}

.form-control {
  width: 100%;
  padding: var(--space-md);
  font-family: var(--font-family);
  font-size: var(--font-size-md);
  color: var(--color-text-primary);
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: border-color var(--transition-fast);
}

.form-control:focus {
  outline: none;
  border-color: var(--color-primary);
}

.form-control::placeholder {
  color: var(--color-text-muted);
}

textarea.form-control {
  min-height: 150px;
  resize: vertical;
}

/* --------------------------------------------------------------------------
   14. Footer
   -------------------------------------------------------------------------- */
.footer {
  background: var(--color-bg-card);
  padding: var(--space-xxl) 0 var(--space-lg);
  border-top: 1px solid var(--color-border);
}

.footer__content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-xl);
  margin-bottom: var(--space-xxl);
}

.footer__brand {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
}

.footer__brand img {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
}

.footer__brand span {
  font-weight: 600;
  color: var(--color-text-primary);
}

.footer__description {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
}

.footer__title {
  font-size: var(--font-size-sm);
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-md);
}

.footer__links {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.footer__links a {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
}

.footer__links a:hover {
  color: var(--color-text-primary);
}

.footer__bottom {
  text-align: center;
  padding-top: var(--space-lg);
  border-top: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
}

/* --------------------------------------------------------------------------
   15. Legal Pages
   -------------------------------------------------------------------------- */
.legal {
  padding-top: 100px;
}

.legal h1 {
  margin-bottom: var(--space-xl);
}

.legal h2 {
  font-size: var(--font-size-xl);
  margin-top: var(--space-xl);
  margin-bottom: var(--space-md);
  color: var(--color-primary-light);
}

.legal p, .legal li {
  color: var(--color-text-secondary);
  line-height: 1.8;
}

.legal ul {
  margin-left: var(--space-lg);
  margin-bottom: var(--space-md);
}

.legal li {
  margin-bottom: var(--space-sm);
  list-style: disc;
}

.legal__date {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  margin-bottom: var(--space-xl);
}

/* --------------------------------------------------------------------------
   16. Support & FAQ Pages
   -------------------------------------------------------------------------- */
.support-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xl);
}

@media (min-width: 768px) {
  .support-grid {
    grid-template-columns: 1fr 1fr;
  }
}

/* FAQ Accordion */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.faq-item {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.faq-item__question {
  width: 100%;
  padding: var(--space-lg);
  background: none;
  border: none;
  color: var(--color-text-primary);
  font-family: var(--font-family);
  font-size: var(--font-size-md);
  font-weight: 600;
  text-align: left;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-md);
}

.faq-item__question:hover {
  background: var(--color-bg-elevated);
}

.faq-item__icon {
  font-size: 20px;
  transition: transform var(--transition-fast);
}

.faq-item.active .faq-item__icon {
  transform: rotate(180deg);
}

.faq-item__answer {
  display: none;
  padding: 0 var(--space-lg) var(--space-lg);
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.faq-item.active .faq-item__answer {
  display: block;
}

.faq-item__answer p {
  margin-bottom: var(--space-md);
}

.faq-item__answer p:last-child {
  margin-bottom: 0;
}

.faq-item__answer ul {
  margin: var(--space-md) 0 0 var(--space-lg);
  padding: 0;
}

.faq-item__answer li {
  margin-bottom: var(--space-sm);
  padding-left: var(--space-sm);
}

.faq-item__answer li:last-child {
  margin-bottom: 0;
}

.faq-item__answer strong {
  color: var(--color-text-primary);
}

.contact-info {
  margin-top: var(--space-xl);
  padding: var(--space-lg);
  background: var(--color-bg-elevated);
  border-radius: var(--radius-lg);
}

.contact-info__item {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-md);
}

.contact-info__item:last-child {
  margin-bottom: 0;
}

.contact-info__icon {
  width: 40px;
  height: 40px;
  background: var(--color-primary);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
}

/* Support Options Grid */
.support-options {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-lg);
  max-width: 900px;
  margin: 0 auto;
}

.support-option {
  display: block;
  padding: var(--space-xl);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  text-align: center;
  text-decoration: none;
  transition: all var(--transition-normal);
}

.support-option:hover {
  border-color: var(--color-primary);
  transform: translateY(-4px);
  background: var(--color-bg-elevated);
}

.support-option__icon {
  font-size: 48px;
  margin-bottom: var(--space-md);
}

.support-option h3 {
  color: var(--color-text-primary);
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-sm);
}

.support-option p {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  margin: 0;
}

/* --------------------------------------------------------------------------
   17. Utilities
   -------------------------------------------------------------------------- */
.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--space-sm); }
.mt-2 { margin-top: var(--space-md); }
.mt-3 { margin-top: var(--space-lg); }
.mt-4 { margin-top: var(--space-xl); }
.mt-5 { margin-top: var(--space-xxl); }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--space-sm); }
.mb-2 { margin-bottom: var(--space-md); }
.mb-3 { margin-bottom: var(--space-lg); }
.mb-4 { margin-bottom: var(--space-xl); }
.mb-5 { margin-bottom: var(--space-xxl); }

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* --------------------------------------------------------------------------
   18. Animations
   -------------------------------------------------------------------------- */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-fadeIn {
  animation: fadeIn 0.6s ease-out forwards;
}

.stagger > * {
  opacity: 0;
  animation: fadeIn 0.6s ease-out forwards;
}

.stagger > *:nth-child(1) { animation-delay: 0.1s; }
.stagger > *:nth-child(2) { animation-delay: 0.2s; }
.stagger > *:nth-child(3) { animation-delay: 0.3s; }
.stagger > *:nth-child(4) { animation-delay: 0.4s; }