/* ============================================================
   Zemzeme Website — components.css
   Nav, buttons, cards, footer, and reusable UI components
   ============================================================ */

/* ── NAV ── */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-subtle);
  transition: border-color var(--transition-base), background var(--transition-base);
}

.nav.scrolled {
  background: rgba(0, 0, 0, 0.95);
  border-bottom-color: var(--border);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

/* Logo */
.nav__logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  text-decoration: none;
  flex-shrink: 0;
}

.nav__logo-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  overflow: hidden;
}

.nav__logo-icon img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

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

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

/* Links */
.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.nav__link {
  padding: var(--space-xs) var(--space-md);
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--text-secondary);
  text-decoration: none;
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast), background var(--transition-fast);
  white-space: nowrap;
}

.nav__link:hover {
  color: var(--text-primary);
  background: var(--border-subtle);
}

.nav__link.active {
  color: var(--accent);
}

/* Actions */
.nav__actions {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

/* Hamburger */
.nav__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  cursor: pointer;
  padding: 4px;
}

.nav__toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.nav__toggle.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav__toggle.open span:nth-child(2) {
  opacity: 0;
}

.nav__toggle.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile nav */
.nav__mobile {
  display: none;
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  background: rgba(0, 0, 0, 0.97);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  padding: var(--space-lg);
  z-index: 99;
  flex-direction: column;
  gap: var(--space-xs);
}

.nav__mobile.open {
  display: flex;
}

.nav__mobile-link {
  display: block;
  padding: var(--space-md);
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--text-secondary);
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: color var(--transition-fast), background var(--transition-fast);
}

.nav__mobile-link:hover {
  color: var(--text-primary);
  background: var(--border-subtle);
}

.nav__mobile .btn {
  margin-top: var(--space-sm);
}

@media (max-width: 900px) {
  .nav__links  { display: none; }
  .nav__toggle { display: flex; }
}

@media (max-width: 480px) {
  .nav__actions .btn-outline { display: none; }
}

/* ── BUTTONS ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 12px 24px;
  font-family: var(--font-family);
  font-size: var(--font-size-sm);
  font-weight: 700;
  letter-spacing: 0.02em;
  border-radius: var(--radius-md);
  text-decoration: none;
  cursor: pointer;
  border: 1px solid transparent;
  transition: background var(--transition-base), color var(--transition-base),
              border-color var(--transition-base), box-shadow var(--transition-base),
              transform var(--transition-fast);
  white-space: nowrap;
  line-height: 1;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(0);
}

/* Primary */
.btn-primary {
  background: var(--accent);
  color: #000000;
  border-color: var(--accent);
}

.btn-primary:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
  box-shadow: var(--glow-accent);
  color: #000000;
}

/* Outline */
.btn-outline {
  background: transparent;
  color: var(--accent);
  border-color: var(--border);
}

.btn-outline:hover {
  background: var(--accent-glow-sm);
  border-color: var(--accent);
  box-shadow: var(--glow-sm);
  color: var(--accent);
}

/* Ghost */
.btn-ghost {
  background: var(--border-subtle);
  color: var(--text-primary);
  border-color: transparent;
}

.btn-ghost:hover {
  background: rgba(255,255,255,0.1);
  color: var(--text-primary);
}

/* Dark (for light contexts) */
.btn-dark {
  background: #000;
  color: var(--text-primary);
  border-color: var(--border-subtle);
}

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

/* Sizes */
.btn-sm {
  padding: 8px 16px;
  font-size: var(--font-size-xs);
}

.btn-lg {
  padding: 16px 32px;
  font-size: var(--font-size-base);
  border-radius: var(--radius-lg);
}

.btn-xl {
  padding: 18px 40px;
  font-size: var(--font-size-lg);
  border-radius: var(--radius-lg);
}

/* Full width */
.btn-full {
  width: 100%;
}

/* Icon only */
.btn-icon {
  padding: 10px;
  width: 40px;
  height: 40px;
}

/* Platform download buttons */
.btn-download {
  display: inline-flex;
  align-items: center;
  gap: var(--space-md);
  padding: 14px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  color: var(--text-primary);
  text-decoration: none;
  transition: all var(--transition-base);
  min-width: 200px;
}

.btn-download:hover {
  border-color: var(--accent);
  background: var(--bg-card-hover);
  box-shadow: var(--glow-border);
  transform: translateY(-2px);
  color: var(--text-primary);
}

.btn-download__icon {
  font-size: 28px;
  flex-shrink: 0;
}

.btn-download__text {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 1px;
}

.btn-download__label {
  font-size: var(--font-size-xs);
  color: var(--text-secondary);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

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

/* ── Store badges (HTML component) ── */
.store-badge {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 10px 18px 10px 14px;
  background: #141414;
  border: 1px solid rgba(255,255,255,0.18);
  border-radius: 12px;
  text-decoration: none;
  color: var(--text-primary);
  min-width: 162px;
  cursor: pointer;
  transition: background var(--transition-fast), border-color var(--transition-fast),
              transform var(--transition-fast);
  user-select: none;
}

.store-badge:not(.store-badge--soon):hover {
  background: #1e1e1e;
  border-color: rgba(255,255,255,0.38);
  transform: translateY(-2px);
}

.store-badge--soon {
  opacity: 0.52;
  cursor: default;
  pointer-events: none;
}

.store-badge__icon {
  flex-shrink: 0;
}

.store-badge__text {
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.store-badge__label {
  font-size: 9px;
  letter-spacing: 0.9px;
  text-transform: uppercase;
  color: rgba(255,255,255,0.5);
  font-weight: 500;
  font-family: var(--font-family);
}

.store-badge__name {
  font-size: 17px;
  font-weight: 700;
  color: #ffffff;
  line-height: 1.2;
  font-family: var(--font-family);
}

/* ── Language selector dropdown ── */
.lang-dropdown { position: relative; }

.lang-btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 6px 10px;
  background: transparent;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-family: var(--font-family);
  font-size: var(--font-size-sm);
  font-weight: 600;
  cursor: pointer;
  transition: border-color var(--transition-fast), color var(--transition-fast);
  white-space: nowrap;
}

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

.lang-current-flag, .lang-btn__flag { font-size: 15px; line-height: 1; }

.lang-btn__arrow { font-size: 9px; opacity: 0.5; margin-left: 1px; }

.lang-dropdown__menu {
  display: none;
  flex-direction: column;
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  background: #111111;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 6px;
  min-width: 155px;
  z-index: 200;
  gap: 2px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.6);
}

.lang-dropdown__menu.open { display: flex; }

.lang-option {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  background: transparent;
  border: none;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-family: var(--font-family);
  font-size: var(--font-size-sm);
  font-weight: 500;
  cursor: pointer;
  text-align: left;
  width: 100%;
  transition: background var(--transition-fast), color var(--transition-fast);
}

.lang-option:hover { background: var(--accent-glow); color: var(--text-primary); }
.lang-option.active { color: var(--accent); font-weight: 700; }

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

.hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

/* Radial glow behind hero text */
.hero__bg::before {
  content: '';
  position: absolute;
  top: 20%;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 600px;
  background: radial-gradient(ellipse at center,
    rgba(0, 229, 255, 0.08) 0%,
    rgba(0, 229, 255, 0.03) 40%,
    transparent 70%
  );
  pointer-events: none;
}

/* Scanlines on hero */
.hero__bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 3px,
    rgba(0, 0, 0, 0.06) 3px,
    rgba(0, 0, 0, 0.06) 4px
  );
  pointer-events: none;
}

.hero__inner {
  position: relative;
  z-index: 2;
  width: 100%;
}

.hero__content {
  max-width: 820px;
  margin: 0 auto;
  text-align: center;
  padding: var(--space-3xl) 0;
}

.hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
  padding: 6px 16px;
  border-radius: var(--radius-full);
  background: var(--accent-glow-sm);
  border: 1px solid var(--border);
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.04em;
}

.hero__eyebrow-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent);
  animation: pulse-dot 2s ease-in-out infinite;
}

.hero__title {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-lg);
}

.hero__title .accent {
  color: var(--accent);
  text-shadow: 0 0 40px rgba(0, 229, 255, 0.4);
}

.hero__subtitle {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: var(--space-xl);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  justify-content: center;
  margin-bottom: var(--space-xl);
}

.hero__scroll-hint {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  margin-top: var(--space-xl);
  color: var(--text-muted);
  font-size: var(--font-size-xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.hero__scroll-arrow {
  width: 20px;
  height: 20px;
  border-right: 2px solid var(--text-muted);
  border-bottom: 2px solid var(--text-muted);
  transform: rotate(45deg);
  animation: bounce-arrow 2s ease-in-out infinite;
}

/* ── STATS STRIP ── */
.stats-strip {
  background: var(--bg-surface);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
  padding: var(--space-xl) 0;
}

.stats-strip__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
}

.stats-strip__item {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: var(--space-lg) var(--space-xl);
  position: relative;
}

.stats-strip__item:not(:last-child)::after {
  content: '';
  position: absolute;
  right: 0;
  top: 20%;
  height: 60%;
  width: 1px;
  background: var(--border-subtle);
}

.stats-strip__number {
  font-size: var(--font-size-4xl);
  font-weight: 900;
  color: var(--accent);
  letter-spacing: -0.03em;
  line-height: 1;
  text-shadow: var(--glow-sm);
}

.stats-strip__label {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  margin-top: var(--space-xs);
  font-weight: 500;
}

@media (max-width: 768px) {
  .stats-strip__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .stats-strip__item:nth-child(2)::after { display: none; }
}

@media (max-width: 480px) {
  .stats-strip__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .stats-strip__item::after { display: none !important; }
}

/* ── FEATURE CARDS (3-layer) ── */
.layer-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

@media (max-width: 900px) {
  .layer-cards { grid-template-columns: 1fr; }
}

.layer-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.layer-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--card-accent, var(--accent)), transparent);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.layer-card:hover {
  border-color: var(--border);
  box-shadow: 0 0 30px var(--accent-glow-sm), var(--shadow-lg);
  transform: translateY(-6px);
}

.layer-card:hover::before {
  opacity: 1;
}

.layer-card__icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  background: var(--accent-glow-sm);
  border: 1px solid var(--border);
}

.layer-card__number {
  font-size: var(--font-size-xs);
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
}

.layer-card__title {
  font-size: var(--font-size-xl);
  font-weight: 800;
  margin-bottom: var(--space-xs);
}

.layer-card__tagline {
  font-size: var(--font-size-sm);
  color: var(--accent);
  font-weight: 600;
  margin-bottom: var(--space-md);
}

.layer-card__desc {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  line-height: 1.7;
  flex: 1;
}

.layer-card__specs {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  padding-top: var(--space-md);
  border-top: 1px solid var(--border-subtle);
}

.layer-card__spec {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--font-size-xs);
  color: var(--text-secondary);
}

.layer-card__spec::before {
  content: '';
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--accent);
  flex-shrink: 0;
}

/* ── HOW IT WORKS / DIAGRAM ── */
.how-it-works__diagram {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: var(--space-2xl);
  margin-top: var(--space-2xl);
}

.how-it-works__row {
  display: grid;
  grid-template-columns: 1fr 60px 1fr 60px 1fr;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

@media (max-width: 768px) {
  .how-it-works__row {
    grid-template-columns: 1fr;
    gap: var(--space-sm);
  }
}

.how-it-works__step {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  text-align: center;
  transition: border-color var(--transition-base);
}

.how-it-works__step:hover {
  border-color: var(--border);
}

.how-it-works__arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  font-size: var(--font-size-xl);
}

@media (max-width: 768px) {
  .how-it-works__arrow {
    transform: rotate(90deg);
  }
}

/* ── PHONE MOCKUP ── */
.phone-mockup {
  position: relative;
  width: 220px;
  margin: 0 auto;
}

.phone-mockup__frame {
  width: 220px;
  height: 440px;
  border-radius: 36px;
  border: 3px solid rgba(255,255,255,0.12);
  background: var(--bg-card);
  overflow: hidden;
  position: relative;
  box-shadow: 0 24px 64px rgba(0,0,0,0.8), 0 0 0 1px rgba(255,255,255,0.05);
}

.phone-mockup__screen {
  width: 100%;
  height: 100%;
  background: #0A0A0A;
  display: flex;
  flex-direction: column;
  font-size: 11px;
  overflow: hidden;
}

.phone-mockup__notch {
  width: 80px;
  height: 20px;
  background: #000;
  border-radius: 0 0 12px 12px;
  margin: 0 auto;
}

.phone-mockup__label {
  text-align: center;
  margin-top: var(--space-md);
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  font-weight: 600;
}

.mockups-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
  align-items: start;
}

@media (max-width: 900px) {
  .mockups-grid { grid-template-columns: 1fr; }
  .phone-mockup { width: 100%; max-width: 280px; }
  .phone-mockup__frame { width: 100%; max-width: 280px; height: 560px; }
}

/* ── SECURITY SECTION ── */
.security-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-lg);
}

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

.security-item {
  display: flex;
  gap: var(--space-md);
  align-items: flex-start;
  padding: var(--space-lg);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.security-item:hover {
  border-color: var(--border);
  box-shadow: var(--glow-sm);
}

.security-item__icon {
  font-size: 24px;
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-glow-sm);
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
}

.security-item__content h4 {
  font-size: var(--font-size-base);
  font-weight: 700;
  margin-bottom: var(--space-xs);
}

.security-item__content p {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ── COMPARISON TABLE ── */
.comparison-wrapper {
  overflow-x: auto;
  border-radius: var(--radius-xl);
  border: 1px solid var(--border-subtle);
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--font-size-sm);
}

.comparison-table th {
  padding: var(--space-lg) var(--space-xl);
  text-align: center;
  font-weight: 800;
  font-size: var(--font-size-sm);
  background: var(--bg-surface);
  border-bottom: 2px solid var(--border-subtle);
  white-space: nowrap;
}

.comparison-table th:first-child {
  text-align: left;
  min-width: 200px;
}

.comparison-table th.highlight {
  color: var(--accent);
  background: var(--accent-glow-sm);
  border-bottom-color: var(--accent);
}

.comparison-table td {
  padding: var(--space-md) var(--space-xl);
  text-align: center;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-subtle);
  vertical-align: middle;
}

.comparison-table td:first-child {
  text-align: left;
  color: var(--text-primary);
  font-weight: 600;
}

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

.comparison-table tr:hover td {
  background: var(--bg-surface);
}

.check-yes,
.comparison-table td.check-yes     { color: var(--success) !important; font-size: 18px; font-weight: 700; }
.check-no,
.comparison-table td.check-no      { color: var(--danger)  !important; font-size: 18px; font-weight: 700; }
.check-partial,
.comparison-table td.check-partial { color: var(--warning) !important; font-size: 18px; font-weight: 700; }

/* Divider between mesh/decentralized apps and traditional IM apps */
.comparison-table th.col-divider,
.comparison-table td.col-divider {
  border-left: 2px solid rgba(255, 255, 255, 0.25) !important;
}

/* ── NEWS / PRESS ── */
.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

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

.news-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  transition: all var(--transition-base);
}

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

.news-card__source {
  font-size: var(--font-size-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
}

.news-card__title {
  font-size: var(--font-size-base);
  font-weight: 700;
  line-height: 1.4;
  color: var(--text-primary);
}

.news-card__date {
  font-size: var(--font-size-xs);
  color: var(--text-muted);
  margin-top: auto;
}

/* ── PLATFORM AVAILABILITY ── */
.platform-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

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

.platform-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-md);
  transition: all var(--transition-base);
}

.platform-card.available {
  border-color: var(--border);
}

.platform-card.available:hover {
  box-shadow: var(--glow-border);
  transform: translateY(-4px);
}

.platform-card__icon {
  font-size: 48px;
}

.platform-card__name {
  font-size: var(--font-size-xl);
  font-weight: 800;
}

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

/* ── CTA BANNER ── */
.cta-banner {
  background: linear-gradient(135deg,
    rgba(0, 229, 255, 0.08) 0%,
    rgba(0, 229, 255, 0.03) 50%,
    rgba(0, 229, 255, 0.08) 100%
  );
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: var(--space-3xl) 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-banner::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 600px;
  height: 300px;
  background: radial-gradient(ellipse, rgba(0, 229, 255, 0.12) 0%, transparent 70%);
  pointer-events: none;
}

.cta-banner__title {
  font-size: clamp(1.75rem, 4vw, 3rem);
  font-weight: 900;
  margin-bottom: var(--space-md);
  position: relative;
  z-index: 1;
}

.cta-banner__subtitle {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  margin-bottom: var(--space-xl);
  position: relative;
  z-index: 1;
}

.cta-banner__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  justify-content: center;
  position: relative;
  z-index: 1;
}

/* ── FOOTER ── */
.footer {
  background: var(--bg-surface);
  border-top: 1px solid var(--border-subtle);
  padding: var(--space-3xl) 0 var(--space-xl);
}

.footer__grid {
  display: grid;
  grid-template-columns: 280px 1fr 1fr 1fr;
  gap: var(--space-2xl);
  margin-bottom: var(--space-2xl);
}

@media (max-width: 1024px) {
  .footer__grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
  }
}

@media (max-width: 768px) {
  .footer__grid {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }
}

.footer__brand {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.footer__logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  text-decoration: none;
}

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

.footer__logo-text span {
  color: var(--accent);
}

.footer__tagline {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  line-height: 1.6;
}

.footer__social {
  display: flex;
  gap: var(--space-sm);
}

.footer__social-link {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  background: var(--border-subtle);
  border: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  color: var(--text-secondary);
  text-decoration: none;
  transition: all var(--transition-base);
}

.footer__social-link:hover {
  background: var(--accent-glow-sm);
  border-color: var(--border);
  color: var(--accent);
  transform: translateY(-2px);
}

.footer__col-title {
  font-size: var(--font-size-sm);
  font-weight: 700;
  color: var(--text-primary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--space-md);
}

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

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

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

.footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-xl);
  border-top: 1px solid var(--border-subtle);
  flex-wrap: wrap;
  gap: var(--space-md);
}

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

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

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

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

.footer__credit a:hover {
  color: var(--accent);
}

/* ── PAGE HERO (inner pages) ── */
.page-hero {
  padding: calc(var(--nav-height) + var(--space-3xl)) 0 var(--space-2xl);
  text-align: center;
  background: var(--bg-primary);
  position: relative;
  overflow: hidden;
}

.page-hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 400px;
  background: radial-gradient(ellipse, rgba(0, 229, 255, 0.06) 0%, transparent 70%);
  pointer-events: none;
}

.page-hero__content {
  position: relative;
  z-index: 1;
}

/* ── FEATURE DEEP DIVE ── */
.feature-deep {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2xl);
  align-items: center;
  padding: var(--space-2xl) 0;
  border-bottom: 1px solid var(--border-subtle);
}

.feature-deep:last-child {
  border-bottom: none;
}

.feature-deep:nth-child(even) .feature-deep__visual {
  order: -1;
}

@media (max-width: 900px) {
  .feature-deep {
    grid-template-columns: 1fr;
  }

  .feature-deep:nth-child(even) .feature-deep__visual {
    order: 0;
  }
}

.feature-deep__icon-lg {
  font-size: 64px;
  margin-bottom: var(--space-lg);
  filter: drop-shadow(0 0 20px rgba(0, 229, 255, 0.4));
}

.feature-deep__visual {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: var(--space-2xl);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 300px;
  text-align: center;
}

.feature-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  margin-top: var(--space-lg);
}

.feature-list__item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
}

.feature-list__item::before {
  content: '→';
  color: var(--accent);
  font-weight: 700;
  flex-shrink: 0;
}

/* ── DOC LAYOUT ── */
.doc-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: var(--space-2xl);
  align-items: start;
  padding-top: calc(var(--nav-height) + var(--space-xl));
}

@media (max-width: 900px) {
  .doc-layout { grid-template-columns: 1fr; }
  .doc-sidebar { display: none; }
}

.doc-sidebar {
  position: sticky;
  top: calc(var(--nav-height) + var(--space-lg));
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
}

.doc-sidebar__title {
  font-size: var(--font-size-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: var(--space-md);
}

.doc-sidebar__link {
  display: block;
  padding: var(--space-xs) var(--space-sm);
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  text-decoration: none;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  border-left: 2px solid transparent;
}

.doc-sidebar__link:hover,
.doc-sidebar__link.active {
  color: var(--accent);
  border-left-color: var(--accent);
  background: var(--accent-glow-sm);
}

.doc-content h2 {
  font-size: var(--font-size-2xl);
  margin-top: var(--space-2xl);
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-sm);
  border-bottom: 1px solid var(--border-subtle);
}

.doc-content h3 {
  font-size: var(--font-size-xl);
  margin-top: var(--space-xl);
  margin-bottom: var(--space-sm);
  color: var(--accent);
}

.doc-content p {
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: var(--space-md);
}

.doc-content ul {
  list-style: disc;
  padding-left: var(--space-xl);
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: var(--space-md);
}

.doc-content ul li {
  margin-bottom: var(--space-xs);
}

.doc-content code {
  font-family: 'Courier New', monospace;
  font-size: 0.875em;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 2px 6px;
  color: var(--accent);
}

.doc-content pre {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  overflow-x: auto;
  margin-bottom: var(--space-lg);
}

.doc-content pre code {
  background: none;
  border: none;
  padding: 0;
  font-size: var(--font-size-sm);
  color: var(--text-primary);
}

/* ── BLOG ── */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-xl);
}

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

.blog-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-base);
}

.blog-card:hover {
  border-color: var(--border);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.blog-card__header {
  background: var(--bg-surface);
  padding: var(--space-xl);
  min-height: 160px;
  display: flex;
  align-items: flex-end;
}

.blog-card__body {
  padding: var(--space-xl);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  flex: 1;
}

.blog-card__meta {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.blog-card__category {
  font-size: var(--font-size-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
}

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

.blog-card__title {
  font-size: var(--font-size-xl);
  font-weight: 800;
  line-height: 1.3;
  color: var(--text-primary);
}

.blog-card__excerpt {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  line-height: 1.7;
  flex: 1;
}

/* ── DOWNLOAD PAGE ── */
.download-options {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

@media (max-width: 900px) {
  .download-options { grid-template-columns: 1fr; }
}

.download-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  transition: all var(--transition-base);
}

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

.download-card:hover {
  border-color: var(--accent);
  box-shadow: var(--glow-border);
  transform: translateY(-4px);
}

.download-card__icon {
  font-size: 48px;
}

.download-card__title {
  font-size: var(--font-size-xl);
  font-weight: 800;
}

.download-card__desc {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  line-height: 1.7;
  flex: 1;
}

/* ── ABOUT / TEAM ── */
.about-values {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-lg);
}

@media (max-width: 768px) {
  .about-values { grid-template-columns: 1fr; }
}

.value-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  display: flex;
  gap: var(--space-md);
  transition: border-color var(--transition-base);
}

.value-card:hover {
  border-color: var(--border);
}

.value-card__icon {
  font-size: 24px;
  flex-shrink: 0;
}

.value-card__content h4 {
  font-size: var(--font-size-base);
  font-weight: 700;
  margin-bottom: var(--space-xs);
}

.value-card__content p {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ── NOTICE / ALERT ── */
.notice {
  padding: var(--space-lg);
  border-radius: var(--radius-lg);
  border: 1px solid;
  font-size: var(--font-size-sm);
  line-height: 1.6;
}

.notice-info {
  background: var(--accent-glow-sm);
  border-color: var(--border);
  color: var(--text-secondary);
}

.notice-info strong {
  color: var(--accent);
}

/* ── Accordion / Steps ── */
.steps {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.step {
  display: flex;
  gap: var(--space-lg);
  padding: var(--space-lg);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  transition: border-color var(--transition-fast);
}

.step:hover {
  border-color: var(--border);
}

.step__num {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--accent-glow-sm);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-sm);
  font-weight: 800;
  color: var(--accent);
  flex-shrink: 0;
}

.step__content h4 {
  font-size: var(--font-size-base);
  font-weight: 700;
  margin-bottom: var(--space-xs);
}

.step__content p {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ── Farsi Collapsible Guide ── */
.farsi-guide {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  margin-top: var(--space-lg);
  transition: border-color var(--transition-base);
}

.farsi-guide[open] {
  border-color: var(--border);
}

.farsi-guide__summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-lg) var(--space-xl);
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--text-primary);
  cursor: pointer;
  list-style: none;
  transition: color var(--transition-fast);
}

.farsi-guide__summary::-webkit-details-marker { display: none; }
.farsi-guide__summary::marker { display: none; content: ''; }

.farsi-guide__summary:hover {
  color: var(--accent);
}

.farsi-guide__arrow {
  font-size: var(--font-size-xl);
  color: var(--accent);
  transition: transform var(--transition-base);
  flex-shrink: 0;
}

.farsi-guide[open] .farsi-guide__arrow {
  transform: rotate(90deg);
}

.farsi-guide__content {
  padding: 0 var(--space-xl) var(--space-xl);
  font-family: 'Nunito', 'Tahoma', 'Arial', sans-serif;
  line-height: 2;
  color: var(--text-secondary);
}

.farsi-guide__content h3 {
  font-size: var(--font-size-xl);
  font-weight: 800;
  color: var(--accent);
  margin-top: var(--space-xl);
  margin-bottom: var(--space-sm);
}

.farsi-guide__content h4 {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--text-primary);
  margin-top: var(--space-lg);
  margin-bottom: var(--space-xs);
}

.farsi-guide__content p {
  margin-bottom: var(--space-md);
}

.farsi-guide__content ul,
.farsi-guide__content ol {
  padding-right: var(--space-xl);
  padding-left: 0;
  margin-bottom: var(--space-md);
}

.farsi-guide__content li {
  margin-bottom: var(--space-xs);
}

/* ── RTL Overrides (Farsi / Persian) ── */
html[lang="fa"] .nav__links {
  flex-direction: row-reverse;
}

html[lang="fa"] .nav__actions {
  flex-direction: row-reverse;
}

html[lang="fa"] .comparison-table th.col-divider,
html[lang="fa"] .comparison-table td.col-divider {
  border-left: none !important;
  border-right: 2px solid rgba(255, 255, 255, 0.25) !important;
}

html[lang="fa"] .doc-sidebar__link {
  border-left: none;
  border-right: 2px solid transparent;
}

html[lang="fa"] .doc-sidebar__link:hover,
html[lang="fa"] .doc-sidebar__link.active {
  border-left-color: transparent;
  border-right-color: var(--accent);
}

html[lang="fa"] .doc-content ul {
  padding-left: 0;
  padding-right: var(--space-xl);
}

html[lang="fa"] .step-number {
  margin-right: 0;
  margin-left: var(--space-md);
}