/* GripStead Pro - High-Converting Official Store Design System */
:root {
  --primary: #00d2ff;
  --primary-hover: #00a3cc;
  --primary-glow: rgba(0, 210, 255, 0.4);
  --accent: #3a86ff;
  --accent-secondary: #ff0055;
  --success: #00e676;
  --warning: #ffbe0b;
  --bg-dark: #0a0f1d;
  --bg-card: rgba(18, 26, 47, 0.75);
  --bg-card-hover: rgba(26, 38, 68, 0.85);
  --border-light: rgba(255, 255, 255, 0.12);
  --text-main: #f1f5f9;
  --text-muted: #94a3b8;
  --text-bright: #ffffff;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-pill: 9999px;
  --shadow-lg: 0 20px 40px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 30px rgba(0, 210, 255, 0.3);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background-color: var(--bg-dark);
  color: var(--text-main);
  line-height: 1.6;
  font-size: 16px;
}

body {
  overflow-x: hidden;
  background: radial-gradient(circle at 50% 0%, #152238 0%, #0a0f1d 70%);
}

h1, h2, h3, h4, h5, h6 {
  font-family: 'Outfit', sans-serif;
  font-weight: 700;
  color: var(--text-bright);
  line-height: 1.25;
}

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

img {
  max-width: 100%;
  height: auto;
  display: block;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* TOP ANNOUNCEMENT STRIP */
.top-bar {
  background: linear-gradient(90deg, #d00000, #ff4800);
  color: #fff;
  text-align: center;
  padding: 10px 15px;
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.5px;
  position: relative;
  z-index: 1010;
  box-shadow: 0 2px 10px rgba(0,0,0,0.3);
}

.top-bar-content {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}

.countdown-box {
  background: rgba(0, 0, 0, 0.3);
  padding: 3px 10px;
  border-radius: var(--radius-pill);
  font-family: monospace;
  font-size: 1rem;
  font-weight: 700;
  border: 1px solid rgba(255,255,255,0.3);
  letter-spacing: 1px;
  color: #fff;
}

/* STICKY HEADER */
.header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(10, 15, 29, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-light);
  padding: 14px 0;
  transition: var(--transition);
}

.nav-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: 'Outfit', sans-serif;
  font-size: 1.4rem;
  font-weight: 800;
  color: #fff;
  letter-spacing: -0.5px;
}

.logo-badge {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #040914;
  padding: 3px 8px;
  border-radius: 6px;
  font-size: 0.75rem;
  font-weight: 900;
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  gap: 28px;
  list-style: none;
}

.nav-links a {
  color: var(--text-muted);
  font-weight: 500;
  font-size: 0.95rem;
}

.nav-links a:hover {
  color: var(--primary);
}

.header-cta {
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  color: #040914;
  font-weight: 800;
  font-size: 0.9rem;
  padding: 10px 22px;
  border-radius: var(--radius-pill);
  box-shadow: 0 4px 15px var(--primary-glow);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.header-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px var(--primary-glow);
}

/* MARQUEE TICKER */
.marquee-container {
  background: linear-gradient(90deg, rgba(0,210,255,0.1), rgba(58,134,255,0.15));
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
  overflow: hidden;
  padding: 10px 0;
  white-space: nowrap;
}

.marquee-track {
  display: inline-flex;
  animation: marquee 25s linear infinite;
  gap: 40px;
}

.marquee-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-bright);
}

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

/* HERO SECTION */
.hero {
  padding: 50px 0 70px;
  position: relative;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 50px;
  align-items: center;
}

.hero-gallery {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.main-preview-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 30px;
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  box-shadow: var(--shadow-lg);
  min-height: 420px;
}

.main-preview-card img {
  max-height: 380px;
  object-fit: contain;
  filter: drop-shadow(0 15px 25px rgba(0,0,0,0.5));
  transition: var(--transition);
}

.badge-featured {
  position: absolute;
  top: 16px;
  left: 16px;
  background: var(--accent-secondary);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 800;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.thumbnails-row {
  display: flex;
  gap: 12px;
  justify-content: center;
}

.thumb-item {
  width: 80px;
  height: 80px;
  background: var(--bg-card);
  border: 2px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 8px;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
}

.thumb-item.active, .thumb-item:hover {
  border-color: var(--primary);
  box-shadow: 0 0 15px var(--primary-glow);
  transform: translateY(-2px);
}

.thumb-item img {
  max-height: 100%;
  object-fit: contain;
}

/* HERO CONTENT */
.hero-content {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.rating-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: rgba(255, 190, 11, 0.12);
  border: 1px solid rgba(255, 190, 11, 0.3);
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  width: fit-content;
}

.stars {
  color: var(--warning);
  font-size: 1.1rem;
}

.rating-text {
  font-size: 0.85rem;
  font-weight: 700;
  color: #ffbe0b;
}

.hero-title {
  font-size: 2.8rem;
  letter-spacing: -1px;
  line-height: 1.15;
  background: linear-gradient(135deg, #ffffff 60%, var(--primary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.2rem;
  color: var(--text-muted);
  font-weight: 400;
}

.hero-benefits {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.hero-benefits li {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 600;
  font-size: 1.05rem;
}

.check-icon {
  width: 24px;
  height: 24px;
  background: rgba(0, 230, 118, 0.15);
  border-radius: 50%;
  color: var(--success);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
  font-size: 0.9rem;
  flex-shrink: 0;
}

/* PRICE & CTA CARD */
.price-cta-box {
  background: linear-gradient(135deg, rgba(0,210,255,0.08), rgba(58,134,255,0.12));
  border: 1px solid rgba(0, 210, 255, 0.3);
  border-radius: var(--radius-lg);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.3);
}

.price-row {
  display: flex;
  align-items: baseline;
  gap: 14px;
}

.old-price {
  font-size: 1.3rem;
  color: var(--text-muted);
  text-decoration: line-through;

}

.current-price {
  font-size: 2.8rem;
  font-weight: 900;
  color: #fff;
  font-family: 'Outfit', sans-serif;
}

.save-badge {
  background: var(--success);
  color: #040914;
  font-weight: 800;
  font-size: 0.85rem;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  text-transform: uppercase;
}

.cta-button {
  background: linear-gradient(135deg, #00e676 0%, #00b0ff 100%);
  color: #040914;
  font-family: 'Outfit', sans-serif;
  font-size: 1.3rem;
  font-weight: 900;
  text-align: center;
  padding: 18px 30px;
  border-radius: var(--radius-md);
  box-shadow: 0 8px 25px rgba(0, 230, 118, 0.4);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  transition: var(--transition);
  display: block;
}

.cta-button:hover {
  transform: translateY(-3px) scale(1.01);
  box-shadow: 0 12px 35px rgba(0, 230, 118, 0.6);
}

.cta-subtext {
  font-size: 0.85rem;
  color: var(--text-muted);
  text-align: center;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
}

/* SECTION TITLES */
.section-header {
  text-align: center;
  max-width: 750px;
  margin: 0 auto 50px;
}

.section-tag {
  color: var(--primary);
  font-weight: 800;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 8px;
  display: block;
}

.section-title {
  font-size: 2.2rem;
  margin-bottom: 14px;
}

.section-subtitle {
  color: var(--text-muted);
  font-size: 1.05rem;
}

/* SCIENCE / FEATURES SECTION */
.science-section {
  padding: 80px 0;
  background: rgba(0, 0, 0, 0.2);
  border-top: 1px solid var(--border-light);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 30px;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.feature-card:hover {
  transform: translateY(-5px);
  background: var(--bg-card-hover);
  border-color: rgba(0, 210, 255, 0.4);
  box-shadow: var(--shadow-glow);
}

.feature-icon {
  width: 54px;
  height: 54px;
  background: linear-gradient(135deg, rgba(0,210,255,0.2), rgba(58,134,255,0.2));
  border: 1px solid rgba(0, 210, 255, 0.3);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
}

.feature-card h3 {
  font-size: 1.3rem;
}

.feature-card p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* SPECS & SURFACE COMPATIBILITY GRIDS */
.specs-box {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 35px;
  margin-top: 40px;
}

.specs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
}

.spec-item {
  border-left: 3px solid var(--primary);
  padding-left: 14px;
}

.spec-item label {
  display: block;
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 4px;
}

.spec-item span {
  font-weight: 700;
  font-size: 1.1rem;
  color: #fff;
}

.surface-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 30px;
  margin-top: 40px;
}

.surface-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 30px;
}

.surface-card.good {
  border-top: 4px solid var(--success);
}

.surface-card.bad {
  border-top: 4px solid var(--accent-secondary);
}

/* LIFESTYLE / DEMO SHOWCASE */
.showcase-section {
  padding: 80px 0;
}

.showcase-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}

.showcase-img-wrap {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-lg);
}

.showcase-content {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

/* SETUP TIMELINE / STEPS */
.steps-section {
  padding: 80px 0;
  background: rgba(0, 0, 0, 0.3);
  border-top: 1px solid var(--border-light);
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.step-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 30px;
  position: relative;
}

.step-number {
  font-family: 'Outfit', sans-serif;
  font-size: 3rem;
  font-weight: 900;
  color: rgba(0, 210, 255, 0.25);
  position: absolute;
  top: 15px;
  right: 20px;
}

.step-card h3 {
  font-size: 1.25rem;
  margin-bottom: 10px;
}

.step-card p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* COMPARISON TABLE */
.comparison-section {
  padding: 80px 0;
}

.table-wrapper {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.comp-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.comp-table th, .comp-table td {
  padding: 18px 24px;
  border-bottom: 1px solid var(--border-light);
}

.comp-table th {
  background: rgba(15, 23, 42, 0.9);
  font-family: 'Outfit', sans-serif;
  font-size: 1.05rem;
}

.highlight-col {
  background: rgba(0, 210, 255, 0.08) !important;
  color: #fff;
  font-weight: 700;
}

.check-yes {
  color: var(--success);
  font-weight: 800;

}

.check-no {
  color: var(--accent-secondary);
  font-weight: 800;

}

/* REVIEWS GRID */
.reviews-section {
  padding: 80px 0;
  background: rgba(0,0,0,0.25);
  border-top: 1px solid var(--border-light);
}

.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}

.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.review-header {
  display: flex;
  align-items: center;
  gap: 14px;
}

.avatar {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--primary);
}

.user-info h4 {
  font-size: 1.05rem;
}

.verified-tag {
  font-size: 0.75rem;
  color: var(--success);
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.review-body p {
  color: var(--text-main);
  font-size: 0.95rem;
  font-style: italic;
}

/* SAFETY & GUARANTEE BOX */
.guarantee-section {
  padding: 70px 0;
}

.guarantee-box {
  background: linear-gradient(135deg, rgba(18, 26, 47, 0.9), rgba(10, 15, 29, 0.95));
  border: 2px solid rgba(255, 190, 11, 0.4);
  border-radius: var(--radius-lg);
  padding: 40px;
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 40px;
  align-items: center;
  box-shadow: 0 15px 40px rgba(0,0,0,0.5);
}

.guarantee-img {
  display: flex;
  justify-content: center;
}

.guarantee-img img {
  max-width: 180px;
  filter: drop-shadow(0 10px 20px rgba(0,0,0,0.4));
}

.guarantee-content h3 {
  font-size: 2rem;
  color: #ffbe0b;
  margin-bottom: 12px;
}

.guarantee-content p {
  color: var(--text-muted);
  font-size: 1.05rem;
  margin-bottom: 20px;
}

/* FAQ ACCORDIONS */
.faq-section {
  padding: 80px 0;
  background: rgba(0,0,0,0.2);
  border-top: 1px solid var(--border-light);
}

.faq-container {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

details {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 18px 24px;
  transition: var(--transition);
}

details[open] {
  border-color: var(--primary);
  background: var(--bg-card-hover);
}

summary {
  font-family: 'Outfit', sans-serif;
  font-weight: 700;
  font-size: 1.15rem;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--text-bright);
}

summary::-webkit-details-marker {
  display: none;
}

summary::after {
  content: '+';
  font-size: 1.5rem;
  color: var(--primary);
  font-weight: 400;
}

details[open] summary::after {
  content: '−';
}

details p {
  margin-top: 14px;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* FOOTER */
.footer {
  background: #040710;
  border-top: 1px solid var(--border-light);
  padding: 50px 0 30px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer-content {
  display: flex;
  flex-direction: column;
  gap: 24px;
  text-align: center;
  max-width: 900px;
  margin: 0 auto;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
}

.footer-links a {
  color: var(--text-muted);
}

.footer-links a:hover {
  color: var(--primary);
}

/* RESPONSIVE DESIGN */
@media (max-width: 992px) {
  .hero-grid, .showcase-grid, .guarantee-box, .surface-grid {
    grid-template-columns: 1fr;
  }
  .steps-grid {
    grid-template-columns: 1fr;
  }
  .hero-title {
    font-size: 2.2rem;
  }
  .comp-table {
    font-size: 0.85rem;
  }
  .comp-table th, .comp-table td {
    padding: 12px 14px;
  }
  .nav-links {
    display: none;
  }
}

@media (max-width: 576px) {
  .hero-title {
    font-size: 1.8rem;
  }
  .price-row {
    flex-wrap: wrap;
  }
  .cta-button {
    font-size: 1.1rem;
    padding: 15px 20px;
  }
  .top-bar {
    font-size: 0.8rem;
  }
}