/*
 * Crimson Folio / Modern Editorial Theme
 * Design by Cascade for WPS Office
 */

:root {
  --color-bg: #fdfcf8;
  --color-surface: #ffffff;
  --color-text: #2c3e50; /* Dark Charcoal */
  --color-primary: #c0392b; /* Crimson Red */
  --color-secondary: #34495e; /* Wet Asphalt */
  --color-accent: #f39c12; /* Gold/Amber */
  --color-border: #ecf0f1;
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --transition-speed: 0.3s;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-family);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4 {
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-secondary);
}

h1 { font-size: 3rem; }
h2 { font-size: 2.25rem; margin-bottom: 2rem; }
h3 { font-size: 1.5rem; margin-bottom: 1rem; }
h4 { font-size: 1.1rem; }

p {
  margin-bottom: 1rem;
}

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

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section {
  padding: 6rem 0;
  border-bottom: 1px solid var(--color-border);
}

.section:last-child {
    border-bottom: none;
}

.section-title {
    text-align: center;
    margin-bottom: 4rem;
}

.section-title h2 {
    position: relative;
    display: inline-block;
    padding-bottom: 0.5rem;
}

.section-title h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 50px;
    height: 3px;
    background-color: var(--color-primary);
}

/* --- Navbar --- */
.navbar {
  position: sticky;
  top: 0;
  width: 100%;
  background-color: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
  z-index: 1000;
  transition: box-shadow var(--transition-speed) ease;
}

.navbar-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 70px;
}

.nav-brand {
  display: flex;
  align-items: center;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-secondary);
}

.nav-brand svg {
  width: 32px;
  height: 32px;
  margin-right: 10px;
}

.nav-links {
  display: flex;
  list-style: none;
}

.nav-item {
  margin: 0 1rem;
}

.nav-link {
  position: relative;
  color: var(--color-text);
  font-weight: 500;
  padding: 0.5rem 0;
  transition: color var(--transition-speed) ease;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--color-primary);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform var(--transition-speed) ease;
}

.nav-link:hover, .nav-link.active {
  color: var(--color-primary);
}

.nav-link.active::after {
  transform: scaleX(1);
}

/* --- Buttons --- */
.btn {
  display: inline-block;
  padding: 0.75rem 1.75rem;
  border: 2px solid transparent;
  border-radius: 50px;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  text-align: center;
  transition: all var(--transition-speed) ease;
  white-space: nowrap;
}

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

.btn-primary:hover {
  background-color: #a53125;
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(192, 57, 43, 0.3);
}

.btn-outline {
    background-color: transparent;
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.btn-outline:hover {
    background-color: var(--color-primary);
    color: #fff;
}

/* --- Hero Section --- */
#hero {
  text-align: center;
  padding: 8rem 0;
  background-color: var(--color-surface);
}

#hero h1 {
  font-size: 3.5rem;
  margin-bottom: 1rem;
}

#hero .sub-headline {
  font-size: 1.25rem;
  color: #555;
  max-width: 700px;
  margin: 0 auto 2rem;
}

#hero .main-cta {
  margin: 2rem 0;
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 3rem;
  margin-top: 4rem;
  flex-wrap: wrap;
}

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

.stat-item .stat-number {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-primary);
}

.stat-item .stat-label {
  font-size: 1rem;
  color: #777;
}

/* --- Features Section --- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-bottom: 4rem;
}

.feature-card {
  background-color: var(--color-surface);
  padding: 2rem;
  border-radius: 8px;
  text-align: center;
  border: 1px solid var(--color-border);
  transition: transform var(--transition-speed), box-shadow var(--transition-speed);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.05);
}

.feature-card svg {
  width: 50px;
  height: 50px;
  color: var(--color-primary);
  margin-bottom: 1.5rem;
}

.feature-deep-dive {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    margin-top: 5rem;
}

.feature-deep-dive:nth-child(odd) .feature-image {
    order: 2;
}

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

.feature-image svg {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
}

/* --- Platforms Section --- */
#platforms {
    background-color: #f9fafb;
}

.platforms-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
}

.platform-card {
  background-color: var(--color-surface);
  padding: 2rem;
  border-radius: 8px;
  text-align: center;
  border: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
}

.platform-card svg {
  width: 60px;
  height: 60px;
  margin-bottom: 1.5rem;
}

.platform-card .platform-name {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.platform-card .platform-req {
  font-size: 0.9rem;
  color: #777;
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

/* --- Reviews Section --- */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
}

.review-card {
  background-color: var(--color-surface);
  padding: 2rem;
  border-radius: 8px;
  border: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
}

.review-stars {
  color: var(--color-accent);
  margin-bottom: 1rem;
}

.review-text {
  font-style: italic;
  color: #555;
  flex-grow: 1;
  margin-bottom: 1rem;
}

.review-author {
  display: flex;
  align-items: center;
  margin-top: 1rem;
}

.review-author-name {
  font-weight: 600;
}

/* --- Security Section --- */
#security {
    background-color: #f9fafb;
}

.security-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 4rem;
}

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

.security-item svg {
    width: 50px;
    height: 50px;
    color: var(--color-primary);
    margin-bottom: 1rem;
}

.comparison-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 2rem;
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    overflow: hidden;
}

.comparison-table th, .comparison-table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--color-border);
}

.comparison-table th {
    background-color: #f9fafb;
    font-weight: 600;
}

.comparison-table tr:last-child td {
    border-bottom: none;
}

.comparison-table .check-mark {
    color: #27ae60;
    font-size: 1.5rem;
}

/* --- Versions Section --- */
.versions-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  align-items: flex-start;
}

.version-card {
  background-color: var(--color-surface);
  padding: 2.5rem 2rem;
  border-radius: 8px;
  border: 1px solid var(--color-border);
  text-align: center;
  position: relative;
  transition: transform var(--transition-speed), box-shadow var(--transition-speed);
}

.version-card.recommended {
    border-color: var(--color-primary);
    border-width: 2px;
    transform: scale(1.05);
}

.version-card .version-name {
  font-size: 1.75rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 0.5rem;
}

.version-card .version-price {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
}

.version-card .version-price span {
    font-size: 1rem;
    font-weight: 400;
    color: #777;
}

.version-features {
  list-style: none;
  margin-bottom: 2rem;
  text-align: left;
}

.version-features li {
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
}

.version-features li svg {
    width: 18px;
    height: 18px;
    color: #27ae60;
    margin-right: 10px;
    flex-shrink: 0;
}

/* --- FAQ Section --- */
#faq {
    background-color: #f9fafb;
}

.faq-container {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  margin-bottom: 1rem;
  overflow: hidden;
}

.faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem;
  cursor: pointer;
  font-weight: 600;
  font-size: 1.1rem;
}

.faq-question:hover {
    color: var(--color-primary);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.5s ease-in-out;
}

.faq-answer p {
  padding: 0 1.5rem 1.5rem;
  color: #555;
  margin: 0;
}

.faq-toggle {
  transition: transform var(--transition-speed) ease;
}

.faq-item.open .faq-answer {
  max-height: 300px; /* Adjust as needed */
}

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

/* --- Footer --- */
.footer {
  background-color: var(--color-secondary);
  color: #bdc3c7;
  padding: 2rem 0;
  text-align: center;
  font-size: 0.9rem;
}

/* --- Animation --- */
@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* --- Responsive --- */
@media (max-width: 768px) {
  h1 { font-size: 2.5rem; }
  h2 { font-size: 1.8rem; }
  .section { padding: 4rem 0; }
  #hero { padding: 5rem 0; }
  .nav-links { display: none; } /* Basic mobile handling, can be improved with JS */
  .feature-deep-dive { grid-template-columns: 1fr; }
  .feature-deep-dive:nth-child(odd) .feature-image { order: 0; }
  .version-card.recommended { transform: scale(1); }
}

@media (max-width: 480px) {
    .hero-stats { gap: 1.5rem; }
    .stat-item .stat-number { font-size: 2rem; }
}