/* ============================================================
   Download Page — Premium Layout (v3)
   Telegram-inspired, clean & modern
   ============================================================ */

/* =============================================
   HERO — Gradient background with blur orb
   ============================================= */
.download-hero {
  text-align: center;
  padding: 5rem 0 4rem;
  position: relative;
  overflow: hidden;
  background: linear-gradient(180deg,
    var(--color-primary-light) 0%,
    rgba(230, 247, 255, 0.35) 40%,
    transparent 100%
  );
}
.download-hero::before {
  content: "";
  position: absolute;
  top: -200px;
  left: 50%;
  transform: translateX(-50%);
  width: 720px;
  height: 720px;
  background: radial-gradient(circle, var(--color-primary-soft) 0%, transparent 60%);
  border-radius: 50%;
  filter: blur(100px);
  opacity: 0.5;
  pointer-events: none;
}
.download-hero::after {
  content: "";
  position: absolute;
  bottom: -60px;
  right: -120px;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.12) 0%, transparent 60%);
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
}
[data-theme="dark"] .download-hero {
  background: linear-gradient(180deg,
    rgba(14, 42, 58, 0.55) 0%,
    rgba(10, 14, 23, 0) 85%
  );
}
[data-theme="dark"] .download-hero::before { opacity: 0.3; }
[data-theme="dark"] .download-hero::after { opacity: 0.5; }

.download-hero .container {
  position: relative;
  z-index: 1;
  max-width: 880px;
}

/* Hero badge */
.download-hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.35rem 1.1rem;
  border-radius: var(--radius-full);
  background: var(--color-bg-card);
  border: 1.5px solid var(--color-primary-soft);
  color: var(--color-primary);
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 1.25rem;
  box-shadow: var(--shadow-sm);
}
.download-hero-badge svg { width: 14px; height: 14px; }

.download-hero h1 {
  font-size: 2.8rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 0.85rem;
  line-height: 1.2;
  background: linear-gradient(135deg, var(--color-heading) 0%, var(--color-primary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
[data-theme="dark"] .download-hero h1 {
  background: linear-gradient(135deg, #f1f5f9 0%, var(--color-primary) 100%);
  -webkit-background-clip: text;
  background-clip: text;
}

.hero-desc {
  font-size: 1.1rem;
  color: var(--color-text-secondary);
  max-width: 600px;
  margin: 0 auto 1.5rem;
  line-height: 1.7;
}
.hero-desc strong { color: var(--color-primary); font-weight: 600; }

/* Device detect hint */
.device-detect-hint {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.55rem 1.2rem;
  border-radius: var(--radius-full);
  background: var(--color-bg-card);
  border: 1.5px solid var(--color-border);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  margin: 0 auto;
  box-shadow: var(--shadow-sm);
}
.device-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--color-primary);
  animation: d-dotPulse 2s ease-in-out infinite;
  flex-shrink: 0;
}
.device-dot.android { background: var(--color-success); }
.device-dot.ios { background: var(--color-accent); }
@keyframes d-dotPulse {
  0%, 100% { box-shadow: 0 0 0 0 var(--color-primary-glow); }
  50% { box-shadow: 0 0 0 7px transparent; }
}

@media (max-width: 1024px) {
  .download-hero { padding: 3.5rem 0 3rem; }
  .download-hero h1 { font-size: clamp(1.6rem, 5vw, 2.3rem); }
}
@media (max-width: 768px) {
  .download-hero { padding: 2.5rem 0 2rem; }
  .download-hero h1 { font-size: 1.5rem; }
  .hero-desc { font-size: 0.95rem; }
  .download-hero::before { width: 280px; height: 280px; top: -90px; }
  .download-hero::after { display: none; }
}

/* =============================================
   FEATURES STRIP — compact highlight pills
   ============================================= */
.d-features-strip {
  padding: 0 0 1.5rem;
  margin-top: -0.5rem;
  position: relative;
  z-index: 1;
}
.d-features-strip .container { max-width: 780px; }
.d-features-strip-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.7rem;
}
.d-feature-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.5rem 1.15rem;
  border-radius: var(--radius-full);
  background: var(--color-bg-card);
  border: 1.5px solid var(--color-border);
  font-size: 0.84rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  box-shadow: var(--shadow-xs);
  transition: all var(--transition-base);
  cursor: default;
}
.d-feature-pill:hover {
  border-color: var(--color-primary-soft);
  color: var(--color-primary);
  background: var(--color-primary-light);
  transform: translateY(-2px);
}

@media (max-width: 768px) {
  .d-features-strip { padding: 0 0 1rem; }
  .d-features-strip-inner { gap: 0.5rem; }
  .d-feature-pill { padding: 0.4rem 0.85rem; font-size: 0.78rem; }
}

/* =============================================
   DOWNLOAD CARDS SECTION
   ============================================= */
.d-cards-section {
  padding: 4rem 0;
}
.d-cards-section .container { max-width: 1120px; }
.d-cards-header {
  text-align: center;
  margin-bottom: 3rem;
}
.d-cards-header h2 {
  font-size: 1.75rem;
  font-weight: 800;
  margin-bottom: 0.5rem;
}
.d-cards-header p {
  color: var(--color-text-secondary);
  font-size: 1rem;
  max-width: 500px;
  margin: 0 auto;
  line-height: 1.6;
}

/* Cards grid — 2x2 on desktop */
.d-cards-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

/* Individual card */
.d-card {
  display: flex;
  flex-direction: column;
  padding: 2rem 1.85rem;
  background: var(--color-bg-card);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-xl);
  transition: all var(--transition-base);
  box-shadow: var(--shadow-card);
  position: relative;
  overflow: hidden;
}
.d-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  opacity: 0;
  transition: opacity var(--transition-base);
  border-radius: var(--radius-xl) var(--radius-xl) 0 0;
}
.d-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-xl);
  border-color: var(--color-primary-soft);
}
.d-card:hover::before { opacity: 1; }

/* Recommend variant */
.d-card--recommend {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 4px var(--color-primary-glow), var(--shadow-md);
  background: linear-gradient(180deg, var(--color-primary-light) 0%, var(--color-bg-card) 6%, var(--color-bg-card) 100%);
}
.d-card--recommend::before { opacity: 1; }

/* Card top row (icon + badge) */
.d-card__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
}

/* Card icon */
.d-card__icon {
  width: 54px;
  height: 54px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-lg);
  flex-shrink: 0;
}
.d-card__icon svg { width: 28px; height: 28px; }

/* Icon color variants */
.d-card__icon--desktop {
  background: linear-gradient(135deg, #dbeafe, #bfdbfe);
  color: #2563eb;
}
.d-card__icon--android {
  background: linear-gradient(135deg, #d1fae5, #a7f3d0);
  color: #059669;
}
.d-card__icon--ios {
  background: linear-gradient(135deg, #e0e7ff, #c7d2fe);
  color: #4f46e5;
}
.d-card__icon--macos {
  background: linear-gradient(135deg, #fce7f3, #fbcfe8);
  color: #db2777;
}
[data-theme="dark"] .d-card__icon--desktop { background: rgba(37,99,235,.18); }
[data-theme="dark"] .d-card__icon--android { background: rgba(5,150,105,.18); }
[data-theme="dark"] .d-card__icon--ios { background: rgba(79,70,229,.18); }
[data-theme="dark"] .d-card__icon--macos { background: rgba(219,39,119,.18); }

/* Recommend badge */
.d-card__badge {
  display: inline-flex;
  align-items: center;
  padding: 0.22rem 0.7rem;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--color-primary), #0077b6);
  color: #fff;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

/* Card text */
.d-card h3 {
  font-size: 1.18rem;
  font-weight: 700;
  margin-bottom: 0.35rem;
}
.d-card__desc {
  color: var(--color-text-secondary);
  font-size: 0.88rem;
  line-height: 1.65;
  margin-bottom: 1.25rem;
  flex: 1;
}
.d-card__desc strong { color: var(--color-text); font-weight: 600; }

/* Card meta */
.d-card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1.35rem;
}
.d-card__meta-item {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  padding: 0.25rem 0.65rem;
  background: var(--color-bg-tertiary);
  border-radius: var(--radius-full);
  font-weight: 500;
}

/* Card button */
.d-card__btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  width: 100%;
  padding: 0.8rem 1.5rem;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, var(--color-primary), #0077b6);
  color: #fff;
  font-size: 0.92rem;
  font-weight: 600;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: all var(--transition-base);
  box-shadow: 0 2px 12px var(--color-primary-glow);
}
.d-card__btn:hover {
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 6px 24px var(--color-primary-glow);
}
.d-card__btn:active { transform: scale(0.97); }

.d-card__btn--outline {
  background: var(--color-bg-card);
  color: var(--color-primary);
  border: 1.5px solid var(--color-primary);
  box-shadow: none;
}
.d-card__btn--outline:hover {
  background: var(--color-primary);
  color: #fff;
  box-shadow: 0 6px 24px var(--color-primary-glow);
}

/* Responsive cards */
@media (max-width: 900px) {
  .d-cards-grid { grid-template-columns: 1fr; gap: 1.25rem; max-width: 500px; margin: 0 auto; }
  .d-card { padding: 1.5rem 1.35rem; }
  .d-cards-header h2 { font-size: 1.4rem; }
}
@media (max-width: 768px) {
  .d-cards-section { padding: 2.5rem 0; }
  .d-cards-header { margin-bottom: 2rem; }
}

/* =============================================
   WHY CHOOSE US SECTION
   ============================================= */
.d-why-section {
  padding: 4.5rem 0;
  background: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border-light);
  border-bottom: 1px solid var(--color-border-light);
  position: relative;
}
.d-why-header {
  text-align: center;
  margin-bottom: 3rem;
}
.d-why-header h2 {
  font-size: 1.75rem;
  font-weight: 800;
  margin-bottom: 0.5rem;
}
.d-why-header p {
  color: var(--color-text-secondary);
  font-size: 0.98rem;
  max-width: 480px;
  margin: 0 auto;
}
.d-why-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}
.d-why-card {
  text-align: center;
  padding: 2rem 1.25rem;
  background: var(--color-bg-card);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
  box-shadow: var(--shadow-card);
}
.d-why-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary-soft);
}
.d-why-card__icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--color-primary-light), var(--color-primary-soft));
  color: var(--color-primary);
  margin: 0 auto 1rem;
}
.d-why-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}
.d-why-card p {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin: 0;
}

@media (max-width: 1024px) {
  .d-why-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .d-why-section { padding: 2.5rem 0; }
  .d-why-grid { grid-template-columns: 1fr; gap: 1rem; }
  .d-why-card { padding: 1.5rem 1.25rem; }
  .d-why-header h2 { font-size: 1.4rem; }
}

/* =============================================
   INSTALL GUIDE SECTION
   ============================================= */
.d-guide-section {
  padding: 4.5rem 0;
}
.d-guide-section .container { max-width: 880px; }
.d-guide-header {
  text-align: center;
  margin-bottom: 3rem;
}
.d-guide-header h2 {
  font-size: 1.75rem;
  font-weight: 800;
  margin-bottom: 0.5rem;
}
.d-guide-header p {
  color: var(--color-text-secondary);
  font-size: 0.98rem;
}
.d-guide-steps {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}
.d-guide-step {
  display: flex;
  align-items: flex-start;
  gap: 1.5rem;
  padding: 1.65rem 1.75rem;
  background: var(--color-bg-card);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
  box-shadow: var(--shadow-card);
}
.d-guide-step:hover {
  border-color: var(--color-primary-soft);
  box-shadow: var(--shadow-md);
  transform: translateX(4px);
}
.d-guide-step__number {
  flex-shrink: 0;
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--color-primary), #0077b6);
  color: #fff;
  font-size: 1.15rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  box-shadow: 0 4px 14px var(--color-primary-glow);
}
.d-guide-step__content { flex: 1; min-width: 0; }
.d-guide-step__content h4 {
  font-size: 1.08rem;
  font-weight: 700;
  margin-bottom: 0.3rem;
}
.d-guide-step__content p {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  margin: 0;
  line-height: 1.6;
}

@media (max-width: 768px) {
  .d-guide-section { padding: 2.5rem 0; }
  .d-guide-header h2 { font-size: 1.4rem; }
  .d-guide-steps { gap: 1rem; }
  .d-guide-step { padding: 1.25rem; gap: 1rem; }
  .d-guide-step__number { width: 40px; height: 40px; font-size: 1rem; }
}
@media (max-width: 480px) {
  .d-guide-step { flex-direction: column; align-items: flex-start; }
}

/* =============================================
   ALIAS TAGS SECTION
   ============================================= */
.d-alias-section {
  padding: 4.5rem 0;
  background: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border-light);
  border-bottom: 1px solid var(--color-border-light);
}
.d-alias-section .container { max-width: 960px; }
.d-alias-header {
  text-align: center;
  margin-bottom: 2.5rem;
}
.d-alias-header h2 {
  font-size: 1.5rem;
  font-weight: 800;
  margin-bottom: 0.4rem;
}
.d-alias-header p {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
}
.d-alias-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(190px, 1fr));
  gap: 0.85rem;
}
.d-alias-tag {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0.65rem 1rem;
  background: var(--color-bg-card);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: 0.86rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: all var(--transition-base);
  cursor: default;
}
.d-alias-tag:hover {
  border-color: var(--color-primary-soft);
  color: var(--color-primary);
  background: var(--color-primary-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

@media (max-width: 768px) {
  .d-alias-section { padding: 2.5rem 0; }
  .d-alias-header h2 { font-size: 1.3rem; }
  .d-alias-grid { grid-template-columns: repeat(2, 1fr); gap: 0.6rem; }
  .d-alias-tag { font-size: 0.8rem; padding: 0.5rem 0.75rem; }
}

/* =============================================
   BOTTOM CTA
   ============================================= */
.d-cta-section {
  padding: 4rem 0;
}
.d-cta-section .container { max-width: 800px; }
.d-cta-box {
  text-align: center;
  padding: 3.5rem 2.5rem;
  background: linear-gradient(135deg, var(--color-primary) 0%, #6366f1 50%, #8b5cf6 100%);
  border-radius: var(--radius-xl);
  color: #fff;
  box-shadow: 0 8px 36px rgba(99, 102, 241, 0.3);
  position: relative;
  overflow: hidden;
}
.d-cta-box::before {
  content: "";
  position: absolute;
  top: -60%;
  left: -60%;
  width: 220%;
  height: 220%;
  background: radial-gradient(circle at 35% 25%, rgba(255,255,255,0.08) 0%, transparent 50%);
  pointer-events: none;
}
.d-cta-box h2 {
  color: #fff;
  font-size: 1.6rem;
  font-weight: 800;
  margin-bottom: 0.7rem;
  position: relative;
  z-index: 1;
}
.d-cta-box p {
  color: rgba(255, 255, 255, 0.85);
  font-size: 0.98rem;
  margin-bottom: 1.75rem;
  position: relative;
  z-index: 1;
}
.d-cta-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 2.5rem;
  border-radius: var(--radius-full);
  background: #fff;
  color: var(--color-primary);
  font-size: 1rem;
  font-weight: 700;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: all var(--transition-base);
  position: relative;
  z-index: 1;
  box-shadow: 0 4px 16px rgba(0,0,0,0.15);
}
.d-cta-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 28px rgba(0,0,0,0.22);
  color: var(--color-primary-dark);
}

@media (max-width: 768px) {
  .d-cta-section { padding: 2.5rem 0; }
  .d-cta-box { padding: 2.5rem 1.5rem; }
  .d-cta-box h2 { font-size: 1.3rem; }
  .d-cta-box p { font-size: 0.92rem; }
}