/* ==========================================================================
   Qirato (قیراط) - Component Stylesheet
   Luxury Persian Sovereign Aurum Components
   Fully Responsive (Mobile First) + High Contrast Light & Dark Modes
   ========================================================================== */

/* --------------------------------------------------------------------------
   Navigation & Header
   -------------------------------------------------------------------------- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  z-index: 1000;
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-subtle);
  transition: background-color 200ms ease, border-color 200ms ease, box-shadow 200ms ease;
}

.header.scrolled {
  border-bottom-color: var(--border-gold);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}

[data-theme="light"] .header.scrolled {
  box-shadow: 0 4px 20px rgba(15, 23, 42, 0.06);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
}

.logo-box {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: #080B11;
  border: 1.5px solid rgba(212, 175, 55, 0.45);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.4), 0 0 14px rgba(212, 175, 55, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 5px;
  flex-shrink: 0;
  transition: transform 200ms ease, border-color 200ms ease, box-shadow 200ms ease;
}

[data-theme="light"] .logo-box {
  background: #0A0D15;
  border-color: rgba(184, 134, 11, 0.6);
  box-shadow: 0 4px 14px rgba(15, 23, 42, 0.2), 0 0 12px rgba(212, 175, 55, 0.25);
}

.brand-logo:hover .logo-box {
  transform: scale(1.06);
  border-color: var(--primary);
  box-shadow: 0 6px 20px rgba(212, 175, 55, 0.45);
}

.logo-box img.logo-icon {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}

.brand-title {
  display: flex;
  flex-direction: column;
}

.brand-name {
  font-size: 1.3rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  background: var(--gold-gradient-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1.2;
}

.brand-tagline {
  font-size: 0.72rem;
  color: var(--text-muted);
  font-weight: 600;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}

.nav-link {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text-secondary);
  position: relative;
  padding: 0.5rem 0;
  transition: color 180ms ease;
}

.nav-link:hover {
  color: var(--text-gold);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  right: 0;
  width: 0;
  height: 2px;
  background: var(--primary);
  transition: width 180ms ease-out;
}

.nav-link:hover::after {
  width: 100%;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.nav-download-btn {
  padding: 0.55rem 1.25rem;
  font-size: 0.88rem;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.theme-toggle-btn {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border-gold);
  color: var(--text-gold);
  font-size: 1.15rem;
  transition: transform 180ms ease-out, background-color 180ms ease-out;
}

[data-theme="light"] .theme-toggle-btn {
  background: #F1F5F9;
  border-color: #CBD5E1;
  color: #7A5500;
}

.theme-toggle-btn:hover {
  transform: scale(1.08);
  background: rgba(212, 175, 55, 0.15);
}

.theme-toggle-btn:active {
  transform: scale(0.95);
}

.mobile-menu-btn {
  display: none;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  align-items: center;
  justify-content: center;
  color: var(--text-primary);
  font-size: 1.35rem;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  transition: transform 220ms cubic-bezier(0.16, 1, 0.3, 1),
              background-color 180ms ease,
              border-color 180ms ease,
              color 180ms ease;
}

[data-theme="light"] .mobile-menu-btn {
  background: #F1F5F9;
  border-color: #CBD5E1;
}

.mobile-menu-btn.active {
  transform: rotate(90deg);
  border-color: var(--border-gold);
  color: var(--text-gold);
}

/* --------------------------------------------------------------------------
   Hero Section
   -------------------------------------------------------------------------- */
.hero-section {
  padding-top: calc(var(--header-height) + 2.5rem);
  padding-bottom: 4.5rem;
  position: relative;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  align-items: center;
  gap: 3rem;
}

.hero-content {
  display: flex;
  flex-direction: column;
  gap: 1.35rem;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.4rem 1rem;
  background: rgba(212, 175, 55, 0.1);
  border: 1px solid var(--border-gold);
  border-radius: var(--radius-full);
  font-size: 0.86rem;
  font-weight: 700;
  color: var(--text-gold);
  width: fit-content;
}

[data-theme="light"] .hero-badge {
  background: rgba(184, 134, 11, 0.1);
  border-color: var(--border-gold-strong);
  color: #7A5500;
}

.hero-title {
  font-size: clamp(2rem, 4.2vw, 3.1rem);
  font-weight: 900;
  line-height: 1.28;
  letter-spacing: -0.03em;
}

.hero-description {
  font-size: clamp(1rem, 1.8vw, 1.15rem);
  color: var(--text-secondary);
  line-height: 1.85;
  max-width: 600px;
}

.hero-cta-group {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
  margin-top: 0.35rem;
}

.hero-specs-pill {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1.25rem;
  font-size: 0.85rem;
  color: var(--text-muted);
  padding-top: 0.25rem;
}

.spec-item {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-weight: 600;
}

.spec-item svg {
  color: var(--primary);
  flex-shrink: 0;
}

/* Phone Mockup Frame */
.hero-device-wrapper {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

.phone-mockup {
  position: relative;
  width: 310px;
  max-width: 100%;
  aspect-ratio: 9 / 19.5;
  border-radius: 46px;
  padding: 10px;
  background: linear-gradient(135deg, #2A2518 0%, #151821 50%, #2A2518 100%);
  border: 2px solid var(--border-gold-strong);
  box-shadow: 0 25px 80px -10px rgba(0, 0, 0, 0.7),
              0 0 45px rgba(212, 175, 55, 0.25);
  z-index: 2;
}

[data-theme="light"] .phone-mockup {
  background: linear-gradient(135deg, #E2D2B0 0%, #D0B984 50%, #B89C5E 100%);
  border-color: #B8860B;
  box-shadow: 0 20px 50px -10px rgba(184, 134, 11, 0.3),
              0 10px 30px rgba(15, 23, 42, 0.12);
}

.phone-notch {
  position: absolute;
  top: 16px;
  left: 50%;
  transform: translateX(-50%);
  width: 86px;
  height: 18px;
  background: #000000;
  border-radius: 12px;
  z-index: 10;
}

.phone-screen {
  width: 100%;
  height: 100%;
  border-radius: 36px;
  overflow: hidden;
  position: relative;
  background: #0B0F19;
}

.phone-screen img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top;
}

/* Floating Badges */
.floating-chip {
  position: absolute;
  background: var(--bg-card);
  border: 1px solid var(--border-gold);
  border-radius: var(--radius-md);
  padding: 0.75rem 1rem;
  backdrop-filter: blur(16px);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.4);
  z-index: 3;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  white-space: nowrap;
}

[data-theme="light"] .floating-chip {
  background: #FFFFFF;
  border-color: rgba(184, 134, 11, 0.35);
  box-shadow: 0 10px 25px rgba(184, 134, 11, 0.15), 0 4px 12px rgba(15, 23, 42, 0.06);
}

.chip-1 {
  top: 15%;
  right: -25px;
}

.chip-2 {
  bottom: 22%;
  left: -35px;
}

.chip-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
}

.chip-icon.bull {
  background: var(--bull-green-bg);
  color: var(--bull-green-text);
}

.chip-icon.gold {
  background: rgba(212, 175, 55, 0.15);
  color: var(--primary);
}

[data-theme="light"] .chip-icon.gold {
  background: rgba(184, 134, 11, 0.12);
  color: #8C6500;
}

.chip-info {
  display: flex;
  flex-direction: column;
}

.chip-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 600;
}

.chip-val {
  font-size: 0.95rem;
  font-weight: 800;
  color: var(--text-primary);
}

/* --------------------------------------------------------------------------
   Live Market Ticker Bar
   -------------------------------------------------------------------------- */
.ticker-section {
  background: var(--bg-surface);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
  padding: 0.75rem 0;
  overflow: hidden;
  position: relative;
}

.ticker-strip {
  display: flex;
  align-items: center;
  gap: 2.5rem;
  white-space: nowrap;
  animation: marquee 35s linear infinite;
}

.ticker-strip:hover {
  animation-play-state: paused;
}

@keyframes marquee {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

.ticker-item {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  font-size: 0.92rem;
}

.ticker-name {
  color: var(--text-secondary);
  font-weight: 600;
}

.ticker-price {
  font-weight: 800;
  color: var(--text-primary);
}

.ticker-change {
  font-size: 0.82rem;
  font-weight: 700;
  padding: 0.15rem 0.45rem;
  border-radius: 6px;
}

.ticker-change.up {
  color: var(--bull-green-text);
  background: var(--bull-green-bg);
}

.ticker-change.down {
  color: var(--bear-red-text);
  background: var(--bear-red-bg);
}

/* --------------------------------------------------------------------------
   Live Interactive Gold Calculator Section
   -------------------------------------------------------------------------- */
.calculator-section {
  padding: 5rem 0;
  position: relative;
}

.calc-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.25rem;
  align-items: stretch;
}

.calc-form-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-xl);
  padding: 2.25rem;
  backdrop-filter: blur(20px);
  box-shadow: var(--shadow-sm);
}

[data-theme="light"] .calc-form-card {
  background: #FFFFFF;
  box-shadow: 0 10px 30px rgba(15, 23, 42, 0.05);
}

.calc-input-group {
  margin-bottom: 1.25rem;
}

.calc-label {
  display: block;
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--text-secondary);
  margin-bottom: 0.45rem;
}

.calc-input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.calc-input {
  width: 100%;
  background: var(--bg-input);
  border: 1.5px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 0.85rem 1rem 0.85rem 4rem;
  color: var(--text-primary);
  font-size: 1.05rem;
  font-weight: 700;
  transition: border-color 180ms ease, box-shadow 180ms ease, background-color 180ms ease;
}

.calc-input:focus {
  border-color: var(--primary);
  background: var(--bg-surface);
  box-shadow: 0 0 0 3px rgba(184, 134, 11, 0.15);
}

.calc-unit {
  position: absolute;
  left: 1rem;
  font-size: 0.82rem;
  color: var(--text-muted);
  font-weight: 700;
  pointer-events: none;
}

/* Redesigned Karat Selector (Never breaks words on mobile) */
.karat-selector {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.5rem;
  margin-top: 0.45rem;
}

.karat-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 0.6rem 0.35rem;
  border-radius: var(--radius-sm);
  background: var(--bg-input);
  border: 1.5px solid var(--border-subtle);
  color: var(--text-secondary);
  font-weight: 700;
  transition: all 180ms ease;
  white-space: nowrap;
  gap: 0.15rem;
  text-align: center;
  cursor: pointer;
}

.karat-btn * {
  pointer-events: none;
}

.karat-btn .karat-name {
  font-size: 0.84rem;
  white-space: nowrap;
}

.karat-btn .karat-code {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 600;
}

.karat-btn.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #FFFFFF;
  box-shadow: 0 4px 12px rgba(184, 134, 11, 0.3);
}

.karat-btn.active .karat-code {
  color: rgba(255, 255, 255, 0.9);
}

/* Calculator Result Card */
.calc-result-card {
  background: linear-gradient(145deg, rgba(26, 36, 58, 0.95) 0%, rgba(14, 20, 32, 0.98) 100%);
  border: 1.5px solid var(--border-gold-strong);
  border-radius: var(--radius-xl);
  padding: 2.25rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: var(--aurum-glow);
  position: relative;
  overflow: hidden;
}

[data-theme="light"] .calc-result-card {
  background: #FFFFFF;
  border: 1.5px solid rgba(184, 134, 11, 0.45);
  box-shadow: 0 12px 35px rgba(184, 134, 11, 0.12), 0 4px 14px rgba(15, 23, 42, 0.05);
}

.calc-result-header {
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 1.15rem;
  margin-bottom: 1.15rem;
}

.calc-result-header h3 {
  font-size: 1.35rem;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.calc-result-header span {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 600;
}

.calc-breakdown-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.65rem 0;
  font-size: 0.95rem;
  border-bottom: 1px dashed var(--border-subtle);
}

.calc-breakdown-row:last-child {
  border-bottom: none;
}

.breakdown-label {
  color: var(--text-secondary);
  font-weight: 600;
}

.breakdown-value {
  font-weight: 800;
  color: var(--text-primary);
}

.final-price-box {
  margin-top: 1.5rem;
  padding: 1.5rem;
  border-radius: var(--radius-md);
  background: rgba(212, 175, 55, 0.1);
  border: 1.5px solid var(--border-gold);
  text-align: center;
}

[data-theme="light"] .final-price-box {
  background: #FDFBF7;
  border: 1.5px solid rgba(184, 134, 11, 0.35);
  box-shadow: 0 4px 14px rgba(184, 134, 11, 0.08);
}

.final-price-label {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 0.25rem;
  font-weight: 600;
}

.final-price-val {
  font-size: clamp(1.7rem, 3.5vw, 2.25rem);
  font-weight: 900;
  color: var(--text-gold);
}

.final-price-words {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-top: 0.45rem;
  line-height: 1.6;
  font-weight: 600;
}

/* --------------------------------------------------------------------------
   Core Features Showcase Grid
   -------------------------------------------------------------------------- */
.features-section {
  padding: 5rem 0;
  position: relative;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.75rem;
}

.feature-card {
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
  height: 100%;
}

.feature-icon-wrapper {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: rgba(212, 175, 55, 0.12);
  border: 1px solid var(--border-gold);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  color: var(--text-gold);
  box-shadow: 0 4px 16px rgba(212, 175, 55, 0.15);
  flex-shrink: 0;
}

[data-theme="light"] .feature-icon-wrapper {
  background: rgba(184, 134, 11, 0.1);
  color: #7A5500;
}

.feature-title {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text-primary);
}

.feature-text {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.75;
}

.feature-tag {
  margin-top: auto;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--text-gold);
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

/* --------------------------------------------------------------------------
   Interactive App Screenshots Showcase
   -------------------------------------------------------------------------- */
.showcase-section {
  padding: 5rem 0;
  position: relative;
}

.showcase-tabs {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.65rem;
  margin-bottom: 2.5rem;
}

.showcase-tab-btn {
  padding: 0.65rem 1.25rem;
  border-radius: var(--radius-full);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 700;
  transition: all 180ms ease;
  white-space: nowrap;
}

[data-theme="light"] .showcase-tab-btn {
  background: #FFFFFF;
  border-color: #CBD5E1;
  color: #334155;
}

.showcase-tab-btn:hover {
  border-color: var(--border-gold);
  color: var(--text-primary);
}

.showcase-tab-btn.active {
  background: var(--gold-gradient);
  color: #080B11;
  border-color: transparent;
  box-shadow: var(--aurum-glow);
}

[data-theme="light"] .showcase-tab-btn.active {
  color: #FFFFFF;
}

.showcase-display {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 3rem;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-xl);
  padding: 2.75rem;
  backdrop-filter: blur(20px);
  box-shadow: var(--shadow-md);
}

[data-theme="light"] .showcase-display {
  background: #FFFFFF;
  box-shadow: 0 12px 35px rgba(15, 23, 42, 0.06);
}

.showcase-image-holder {
  position: relative;
  display: flex;
  justify-content: center;
  cursor: pointer;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.4);
  border: 1px solid var(--border-gold);
  transition: transform 220ms ease;
  background: #000000;
}

[data-theme="light"] .showcase-image-holder {
  box-shadow: 0 12px 30px rgba(184, 134, 11, 0.15), 0 4px 15px rgba(15, 23, 42, 0.08);
}

.showcase-image-holder:hover {
  transform: scale(1.02);
}

.showcase-image-holder img {
  width: 100%;
  max-height: 480px;
  object-fit: cover;
  object-position: top;
}

.zoom-hint {
  position: absolute;
  bottom: 1rem;
  right: 1rem;
  padding: 0.4rem 0.8rem;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(8px);
  border-radius: var(--radius-full);
  font-size: 0.78rem;
  color: #F3C64F;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  border: 1px solid var(--border-gold);
  font-weight: 600;
}

.showcase-details {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.showcase-details h3 {
  font-size: clamp(1.4rem, 2.5vw, 1.85rem);
  font-weight: 800;
  color: var(--text-primary);
}

.showcase-details p {
  color: var(--text-secondary);
  line-height: 1.85;
  font-size: 1.05rem;
}

.showcase-bullets {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  margin-top: 0.35rem;
}

.showcase-bullet-item {
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
  font-size: 0.95rem;
  color: var(--text-primary);
  font-weight: 600;
  line-height: 1.6;
}

.showcase-bullet-item i {
  color: var(--bull-green-text);
  font-style: normal;
  font-weight: 900;
  font-size: 1.1rem;
  line-height: 1.4;
}

/* --------------------------------------------------------------------------
   Download Center Hub
   -------------------------------------------------------------------------- */
.download-section {
  padding: 5rem 0;
  position: relative;
}

.download-box {
  background: radial-gradient(circle at 10% 20%, rgba(212, 175, 55, 0.15) 0%, rgba(14, 20, 32, 0.98) 70%);
  border: 1.5px solid var(--border-gold-strong);
  border-radius: var(--radius-xl);
  padding: 3.5rem;
  box-shadow: var(--aurum-glow-strong);
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
  align-items: center;
  gap: 3rem;
}

[data-theme="light"] .download-box {
  background: linear-gradient(135deg, #FFFDF8 0%, #F5ECDA 100%);
  border-color: rgba(184, 134, 11, 0.45);
  box-shadow: 0 16px 45px rgba(184, 134, 11, 0.14), 0 4px 16px rgba(15, 23, 42, 0.06);
}

.download-info {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.download-info h2 {
  font-size: clamp(1.8rem, 3.2vw, 2.35rem);
  font-weight: 900;
  color: var(--text-primary);
}

.download-info p {
  color: var(--text-secondary);
  font-size: 1.05rem;
  line-height: 1.85;
}

.download-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 0.35rem;
}

.download-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  font-size: 0.85rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border-subtle);
  padding-top: 1.25rem;
  font-weight: 600;
}

/* QR Code Card */
.download-qr-card {
  background: var(--bg-card);
  border: 1px solid var(--border-gold);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 0.85rem;
  backdrop-filter: blur(16px);
}

[data-theme="light"] .download-qr-card {
  background: #FFFFFF;
  border-color: rgba(184, 134, 11, 0.35);
  box-shadow: 0 8px 24px rgba(184, 134, 11, 0.1);
}

.qr-box {
  background: #FFFFFF;
  padding: 10px;
  border-radius: var(--radius-md);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.25);
}

.qr-box svg, .qr-box img {
  width: 160px;
  height: 160px;
  display: block;
}

.qr-caption {
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-weight: 600;
  line-height: 1.6;
}

/* --------------------------------------------------------------------------
   Technical Specs Grid
   -------------------------------------------------------------------------- */
.specs-section {
  padding: 4rem 0 5rem 0;
}

.specs-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.spec-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  text-align: center;
  transition: border-color 180ms ease, box-shadow 180ms ease;
}

[data-theme="light"] .spec-card {
  background: #FFFFFF;
  border-color: #CBD5E1;
  box-shadow: 0 4px 16px rgba(15, 23, 42, 0.04);
}

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

.spec-card-icon {
  font-size: 1.85rem;
  color: var(--text-gold);
  margin-bottom: 0.65rem;
}

.spec-card-title {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 0.35rem;
}

.spec-card-sub {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* --------------------------------------------------------------------------
   FAQ Accordion
   -------------------------------------------------------------------------- */
.faq-section {
  padding: 4rem 0 6rem 0;
}

.faq-list {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color 180ms ease, box-shadow 180ms ease;
}

[data-theme="light"] .faq-item {
  background: #FFFFFF;
  border-color: #CBD5E1;
  box-shadow: 0 2px 10px rgba(15, 23, 42, 0.03);
}

.faq-item.active {
  border-color: var(--border-gold-strong);
}

.faq-question {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.25rem 1.5rem;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  text-align: right;
  cursor: pointer;
}

.faq-icon {
  font-size: 1.1rem;
  color: var(--text-gold);
  transition: transform 200ms ease;
  flex-shrink: 0;
  margin-right: 0.75rem;
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  padding: 0 1.5rem;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.85;
  transition: max-height 250ms cubic-bezier(0.16, 1, 0.3, 1), padding 250ms ease;
}

.faq-item.active .faq-answer {
  max-height: 300px;
  padding-bottom: 1.35rem;
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.footer {
  background: #05070B;
  color: #F8FAFC;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 4.5rem 0 2rem 0;
  position: relative;
}

.footer-top {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 3.5rem;
  margin-bottom: 3.5rem;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.footer-desc {
  color: #94A3B8;
  font-size: 0.92rem;
  line-height: 1.85;
  max-width: 380px;
}

.footer-heading {
  font-size: 1.1rem;
  font-weight: 800;
  color: #F8FAFC;
  margin-bottom: 1.25rem;
  position: relative;
}

.footer-heading::after {
  content: '';
  position: absolute;
  bottom: -6px;
  right: 0;
  width: 28px;
  height: 2px;
  background: var(--primary);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-link {
  color: #CBD5E1;
  font-size: 0.92rem;
  font-weight: 500;
  transition: color 180ms ease, transform 180ms ease;
}

.footer-link:hover {
  color: var(--primary-light);
  transform: translateX(-4px);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  color: #94A3B8;
}

/* ==========================================================================
   Responsive Breakpoints & Media Queries
   ========================================================================== */

/* Tablets & Small Laptops (<= 1024px) */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 2.5rem;
  }
  .hero-content {
    align-items: center;
  }
  .hero-description {
    margin: 0 auto;
  }
  .hero-cta-group {
    justify-content: center;
  }
  .hero-specs-pill {
    justify-content: center;
  }
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .calc-grid {
    grid-template-columns: 1fr;
  }
  .showcase-display {
    grid-template-columns: 1fr;
    padding: 2rem;
  }
  .download-box {
    grid-template-columns: 1fr;
    padding: 2.5rem;
    text-align: center;
  }
  .download-buttons {
    justify-content: center;
  }
  .download-meta {
    justify-content: center;
  }
  .specs-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-top {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
}

/* Mobile Devices (<= 768px) */
@media (max-width: 768px) {
  :root {
    --header-height: 68px;
  }

  /* 1. Compact circular download icon button in header on mobile */
  .nav-download-btn {
    width: 42px !important;
    height: 42px !important;
    padding: 0 !important;
    border-radius: 50% !important;
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
    box-shadow: 0 4px 14px rgba(212, 175, 55, 0.35) !important;
    flex-shrink: 0;
  }

  .nav-download-btn .btn-text {
    display: none !important;
  }

  .mobile-menu-btn {
    display: flex;
  }

  /* 2. Smoothly animated slide-down navigation drawer */
  .nav-links {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--bg-glass);
    backdrop-filter: blur(28px);
    -webkit-backdrop-filter: blur(28px);
    border-bottom: 2px solid var(--border-gold);
    padding: 1.5rem 1.25rem 2rem;
    flex-direction: column;
    align-items: stretch;
    gap: 0.75rem;
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.4);
    z-index: 999;
    
    /* Hardware accelerated transition */
    transform: translateY(-120%);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: transform 360ms cubic-bezier(0.16, 1, 0.3, 1),
                opacity 280ms ease,
                visibility 360ms;
    will-change: transform, opacity;
  }

  [data-theme="light"] .nav-links {
    background: rgba(255, 255, 255, 0.96);
    box-shadow: 0 20px 45px rgba(15, 23, 42, 0.12);
  }

  .nav-links.mobile-open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
  }

  .nav-link {
    padding: 0.85rem 1rem;
    border-radius: var(--radius-sm);
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    font-size: 1rem;
    font-weight: 700;
    text-align: right;
    display: flex;
    align-items: center;
    justify-content: space-between;
    transform: translateY(-8px);
    opacity: 0;
    transition: transform 300ms cubic-bezier(0.16, 1, 0.3, 1),
                opacity 260ms ease,
                background-color 180ms ease,
                color 180ms ease;
  }

  .nav-links.mobile-open .nav-link {
    transform: translateY(0);
    opacity: 1;
  }

  .nav-links.mobile-open .nav-link:nth-child(1) { transition-delay: 40ms; }
  .nav-links.mobile-open .nav-link:nth-child(2) { transition-delay: 80ms; }
  .nav-links.mobile-open .nav-link:nth-child(3) { transition-delay: 120ms; }
  .nav-links.mobile-open .nav-link:nth-child(4) { transition-delay: 160ms; }
  .nav-links.mobile-open .nav-link:nth-child(5) { transition-delay: 200ms; }

  .nav-link:active {
    transform: scale(0.98);
  }

  .nav-link::after {
    display: none;
  }

  .nav-link:hover {
    background: rgba(212, 175, 55, 0.1);
    color: var(--text-gold);
    border-color: var(--border-gold);
  }

  /* 3. Hero adjustments & Mobile Layout Ordering */
  .hero-section {
    padding-top: calc(var(--header-height) + 1.5rem);
    padding-bottom: 3.5rem;
  }
  .hero-grid {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.35rem;
    text-align: center;
  }
  .hero-content {
    display: contents;
  }
  .hero-title {
    order: 1;
    font-size: 2rem;
    text-align: center;
  }
  .hero-description {
    order: 2;
    font-size: 0.98rem;
    text-align: center;
    margin: 0 auto;
  }

  /* 4. Phone Mockup Screenshot on Mobile: App visual comes FIRST before download */
  .hero-device-wrapper {
    order: 3;
    width: 100%;
    max-width: 320px;
    margin: 0.5rem auto 0.75rem;
    overflow: visible;
    display: flex;
    flex-direction: column;
    align-items: center;
  }
  .phone-mockup {
    width: 270px;
  }
  
  .floating-chip {
    position: static;
    width: 100%;
    max-width: 280px;
    margin-top: 0.65rem;
    box-shadow: var(--shadow-sm);
  }
  .chip-1, .chip-2 {
    top: auto;
    bottom: auto;
    right: auto;
    left: auto;
  }

  /* 5. Download CTA & Specs come AFTER Screenshot on Mobile */
  .hero-cta-group {
    order: 4;
    flex-direction: column;
    width: 100%;
    gap: 0.85rem;
  }
  .btn-gold, .btn-secondary {
    width: 100%;
  }
  .hero-specs-pill {
    order: 5;
    width: 100%;
    justify-content: center;
  }

  /* 6. Karat buttons never break on mobile */
  .karat-selector {
    grid-template-columns: repeat(4, 1fr);
    gap: 0.35rem;
  }
  .karat-btn {
    padding: 0.45rem 0.2rem;
  }
  .karat-btn .karat-name {
    font-size: 0.76rem;
  }
  .karat-btn .karat-code {
    font-size: 0.7rem;
  }

  /* 6. Tabs horizontal scroll on mobile */
  .showcase-tabs {
    flex-wrap: nowrap;
    overflow-x: auto;
    justify-content: flex-start;
    padding-bottom: 0.75rem;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }
  .showcase-tabs::-webkit-scrollbar {
    display: none;
  }

  /* 7. Grids to single column */
  .features-grid {
    grid-template-columns: 1fr;
  }
  .specs-grid {
    grid-template-columns: 1fr;
  }
  .calc-form-card, .calc-result-card {
    padding: 1.35rem;
  }
  .download-box {
    padding: 1.75rem 1.15rem;
  }
  .footer-bottom {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }
}