/* ===================================
   PAGE SECTIONS STYLES
   =================================== */

/* =========================================
   NAVBAR
   ========================================= */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-navbar);
  background-color: var(--color-navbar-bg);
  border-bottom: 1px solid var(--color-navbar-border);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition:
    background-color var(--transition-slow),
    border-color var(--transition-slow),
    box-shadow var(--transition-base);
}

.navbar.scrolled {
  box-shadow: var(--shadow-sm);
}

.navbar__inner {
  display: flex;
  align-items: center;
  height: 58px;
  gap: var(--space-6);
  max-width: 960px;
}

.navbar__brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  flex-shrink: 0;
}

.navbar__logo-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  color: var(--brand-primary);
}

.navbar__brand-name {
  font-size: var(--font-size-md);
  font-weight: 800;
  color: var(--color-text-primary);
  letter-spacing: -0.02em;
}

.navbar__version-badge {
  display: inline-block;
  font-size: 10px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  background: var(--color-release-bg);
  color: var(--color-release-text);
  border: 1px solid var(--color-release-border);
  letter-spacing: 0.02em;
}

.navbar__nav {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  margin-left: auto;
}

.navbar__link {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
  position: relative;
}

.navbar__link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--brand-primary);
  border-radius: var(--radius-full);
  transition: width var(--transition-base);
}

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

.navbar__link:hover::after {
  width: 100%;
}

.navbar__actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-left: var(--space-4);
  flex-shrink: 0;
}

/* Mobile toggle button */
.navbar__mobile-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  padding: 0;
  cursor: pointer;
  background: none;
  border: none;
  margin-left: auto;
}

.navbar__mobile-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background-color: var(--color-text-secondary);
  border-radius: var(--radius-full);
  transition: transform var(--transition-base), opacity var(--transition-fast);
}

.navbar__mobile-menu {
  display: none;
  flex-direction: column;
  padding: var(--space-4) var(--space-6);
  border-top: 1px solid var(--color-border);
  gap: var(--space-4);
}

.navbar__mobile-menu .navbar__link {
  font-size: var(--font-size-base);
}

@media (max-width: 700px) {

  .navbar__nav,
  .navbar__actions {
    display: none;
  }

  .navbar__mobile-toggle {
    display: flex;
  }

  .navbar__mobile-menu.open {
    display: flex;
  }
}


/* =========================================
   HERO
   ========================================= */
.hero {
  position: relative;
  padding-top: calc(58px + var(--space-16));
  padding-bottom: var(--space-20);
  overflow: hidden;
  background: linear-gradient(160deg, var(--color-hero-gradient-start) 0%, var(--color-hero-gradient-end) 100%);
  transition: background var(--transition-slow);
  text-align: center;
}

.hero__bg-gradient {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 70% 50% at 50% 0%, var(--brand-primary-glow), transparent);
  pointer-events: none;
}

.hero__inner {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hero__title {
  font-size: clamp(3rem, 8vw, var(--font-size-hero));
  font-weight: 900;
  letter-spacing: -0.03em;
  color: var(--brand-primary);
  margin-bottom: var(--space-3);
  line-height: 1;
}

.hero__subtitle {
  font-size: var(--font-size-lg);
  font-weight: 400;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-5);
  letter-spacing: 0;
}

.hero__description {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  line-height: 1.8;
  max-width: 520px;
}


/* =========================================
   DOWNLOAD SECTION
   ========================================= */
.download-section {
  text-align: center;
}

.download-section .section-title {
  margin-bottom: var(--space-3);
}

.download-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
  margin-top: var(--space-10);
  text-align: left;
}

.download-card {
  background-color: var(--color-card-bg);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--color-card-shadow);
  padding: var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  transition:
    background-color var(--transition-slow),
    border-color var(--transition-slow),
    transform var(--transition-base),
    box-shadow var(--transition-base);
}

.download-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}

.download-card__icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  padding: var(--space-3);
}

.download-card__icon--windows {
  background: rgba(0, 120, 212, 0.1);
  color: var(--color-win-icon);
}

.download-card__icon--macos {
  background: rgba(80, 80, 80, 0.08);
  color: var(--color-mac-icon);
}

[data-theme="dark"] .download-card__icon--macos {
  background: rgba(154, 176, 200, 0.1);
}

.download-card__title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-text-primary);
}

.download-card__desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: 1.65;
  flex: 1;
}

.download-card__meta {
  display: flex;
  gap: var(--space-6);
  padding: var(--space-4) 0;
  border-top: 1px solid var(--color-border-subtle);
  flex-wrap: wrap;
}

.meta-item {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.meta-label {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.meta-value {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text-primary);
  line-height: 1.4;
}

@media (max-width: 640px) {
  .download-grid {
    grid-template-columns: 1fr;
  }
}


/* =========================================
   FEATURES SECTION
   ========================================= */
.features-section {
  text-align: center;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5);
  margin-top: var(--space-10);
  text-align: left;
}

.feature-card {
  background-color: var(--color-card-bg);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  transition:
    background-color var(--transition-slow),
    border-color var(--transition-slow),
    transform var(--transition-base),
    box-shadow var(--transition-base);
}

.feature-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.feature-card__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: var(--brand-primary-light);
  color: var(--brand-primary);
  margin-bottom: var(--space-2);
}

.feature-card__title {
  font-size: var(--font-size-base);
  font-weight: 700;
  color: var(--color-text-primary);
  line-height: 1.3;
}

.feature-card__desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: 1.65;
}

@media (max-width: 760px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 500px) {
  .features-grid {
    grid-template-columns: 1fr;
  }
}


/* =========================================
   REQUIREMENTS SECTION
   ========================================= */
.requirements-section {
  text-align: center;
}

.requirements-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
  margin-top: var(--space-10);
  max-width: 620px;
  margin-left: auto;
  margin-right: auto;
  text-align: left;
}

.requirement-card {
  background-color: var(--color-card-bg);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  transition:
    background-color var(--transition-slow),
    border-color var(--transition-slow),
    transform var(--transition-base),
    box-shadow var(--transition-base);
}

.requirement-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.requirement-card__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
}

.requirement-card__icon--windows {
  background: rgba(0, 120, 212, 0.1);
  color: var(--color-win-icon);
}

.requirement-card__icon--macos {
  background: rgba(80, 80, 80, 0.08);
  color: var(--color-mac-icon);
}

[data-theme="dark"] .requirement-card__icon--macos {
  background: rgba(154, 176, 200, 0.1);
}

.requirement-card__title {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-text-primary);
}

.requirement-card__desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: 1.65;
  flex: 1;
}

@media (max-width: 540px) {
  .requirements-grid {
    grid-template-columns: 1fr;
  }
}


/* =========================================
   SUPPORT SECTION
   ========================================= */
.support-section {
  text-align: center;
}

.support-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
  max-width: 520px;
  margin-left: auto;
  margin-right: auto;
}

.support-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: var(--radius-lg);
  background: var(--brand-primary-light);
  color: var(--brand-primary);
  margin-bottom: var(--space-2);
}

.support-inner .section-title {
  margin-bottom: 0;
}

.support-inner .section-desc {
  margin-bottom: var(--space-2);
}


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

.footer__inner {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-10);
  padding-top: var(--space-12);
  padding-bottom: var(--space-12);
  max-width: 960px;
}

.footer__brand {
  flex: 0 0 220px;
}

.footer__logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.footer__logo-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: var(--brand-primary-logo-light);
  color: var(--brand-primary);
  flex-shrink: 0;
}

.footer__built-label {
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: 2px;
}

.footer__company {
  font-size: var(--font-size-base);
  font-weight: 700;
  color: var(--color-text-primary);
}

.footer__tagline {
  font-size: var(--font-size-sm);
  color: var(--color-footer-text);
  line-height: 1.6;
  max-width: 200px;
}

.footer__links {
  display: flex;
  gap: var(--space-10);
}

.footer__col {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer__col-title {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: var(--space-1);
}

.footer__link-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.footer__link {
  font-size: var(--font-size-sm);
  color: var(--color-footer-text);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

/* Footer Bottom Bar */
.footer__bottom {
  border-top: 1px solid var(--color-footer-border);
  transition: border-color var(--transition-slow);
}

.footer__bottom-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 52px;
  max-width: 960px;
}

.footer__copyright {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

.footer__motto {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

@media (max-width: 700px) {
  .footer__inner {
    flex-direction: column;
    gap: var(--space-8);
  }

  .footer__links {
    gap: var(--space-8);
  }

  .footer__bottom-inner {
    flex-direction: column;
    height: auto;
    padding: var(--space-4) 0;
    gap: var(--space-2);
    text-align: center;
  }
}