/* ==========================================
   FocusVault — Product Page (Purple/Indigo)
   ========================================== */

:root {
  --primary: #8B5CF6;
  --primary-dark: #7C3AED;
  --secondary: #6366F1;
  --accent: #A78BFA;
  --c-bg: #0a0a14;
  --c-surface: #0e0e1e;
  --c-card: rgba(255 255 255 / 0.04);
  --c-card-hover: rgba(255 255 255 / 0.08);
  --c-border: rgba(255 255 255 / 0.08);
  --c-border-hl: rgba(255 255 255 / 0.15);
  --c-text: #e8e8f0;
  --c-text-sub: #9898b0;
  --c-text-dim: #606080;
  --grad-hero: linear-gradient(135deg, #8B5CF6 0%, #6366F1 100%);
  --grad-accent: linear-gradient(135deg, #8B5CF6, #6366F1);
  --glass: rgba(255 255 255 / 0.03);
  --glass-border: rgba(255 255 255 / 0.06);
  --radius-sm: 12px;
  --radius-md: 20px;
  --radius-lg: 28px;
  --shadow-card: 0 4px 30px rgba(0,0,0,0.4);
  --font-main: 'Noto Sans JP', 'Inter', system-ui, sans-serif;
  --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: var(--font-main);
  background: var(--c-bg);
  color: var(--c-text);
  line-height: 1.7;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--primary); }
img { max-width: 100%; display: block; }

::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--c-bg); }
::-webkit-scrollbar-thumb { background: var(--grad-accent); border-radius: 10px; }

.container { max-width: 1100px; margin: 0 auto; padding: 0 2rem; }

/* ── Header ── */
header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(10, 10, 20, 0.85);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--c-border);
  transition: all var(--transition);
}

.header-content {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 64px;
}

.header-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--c-text);
}

.header-logo i { color: var(--primary); font-size: 1.2rem; }

.header-right {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.header-nav {
  display: flex;
  gap: 0.3rem;
  list-style: none;
}

.header-nav a {
  padding: 6px 14px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--c-text-sub);
  border-radius: var(--radius-sm);
  transition: all var(--transition);
}

.header-nav a:hover { color: var(--c-text); background: var(--c-card); }

.lang-switch {
  display: flex;
  align-items: center;
  gap: 4px;
  background: var(--c-card);
  border-radius: var(--radius-sm);
  padding: 3px;
  border: 1px solid var(--c-border);
}

.lang-btn {
  background: none;
  border: none;
  padding: 5px 9px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--c-text-sub);
  border-radius: 8px;
  cursor: pointer;
  transition: all var(--transition);
  font-family: var(--font-main);
}

.lang-btn.active {
  background: var(--grad-accent);
  color: white;
  box-shadow: 0 2px 8px rgba(139,92,246,0.3);
}

.lang-btn:hover:not(.active) { color: var(--c-text); }

/* Mobile */
.mobile-menu-button {
  display: none;
  background: none;
  border: none;
  color: var(--c-text);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 4px 8px;
}

.mobile-menu {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: #050510 !important;
  backdrop-filter: none !important;
  z-index: 20000 !important;
  padding-top: 80px;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition);
}

.mobile-menu.active { opacity: 1; pointer-events: all; }

.mobile-menu ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
}

.mobile-menu ul li a {
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--c-text);
}

/* ── Hero ── */
.hero {
  position: relative;
  background: var(--c-surface);
  padding: 100px 0 0;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -25%;
  width: 150%;
  height: 150%;
  background: radial-gradient(ellipse at 30% 50%, rgba(139,92,246,0.08) 0%, transparent 60%);
  pointer-events: none;
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
  max-width: 1100px;
  margin: 0 auto;
  padding: 3rem 2rem;
  position: relative;
}

.hero-text h1 {
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 1rem;
}

.hero-text h1 .highlight {
  background: var(--grad-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-text > p {
  color: var(--c-text-sub);
  font-size: 1rem;
  line-height: 1.8;
  margin-bottom: 2rem;
}

.hero-badges {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.hero-badges .badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  background: var(--c-card);
  border: 1px solid var(--c-border);
  border-radius: 50px;
  font-size: 0.85rem;
  color: var(--c-text-sub);
  font-weight: 500;
}

.hero-badges .badge i { color: var(--primary); }

/* --- Coming Soon Badge --- */
.coming-soon-badge {
  display: inline-block;
  background: rgba(139, 92, 246, 0.15);
  color: #a78bfa;
  font-size: 0.8rem;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 4px;
  border: 1px solid rgba(139, 92, 246, 0.3);
  margin-bottom: 1rem;
  letter-spacing: 0.05em;
}

.store-button.disabled {
  opacity: 0.7;
  cursor: not-allowed;
}
.store-button.disabled:hover {
  transform: none;
}

/* --- Store Buttons (badge images) --- */
.download-buttons {
  display: flex; gap: 16px; justify-content: center; flex-wrap: wrap;
  margin: 2rem 0;
}
.store-button { display: inline-flex; align-items: center; transition: transform var(--transition); }
.store-button:hover { transform: translateY(-3px); }
.store-badge { width: auto; }
.store-badge-apple { height: 54px; }
.store-badge-google { height: 68px; }

/* Hero Swiper */
.hero-swiper-wrapper {
  position: relative;
  width: 100%;
  max-width: 300px;
  margin: 0 auto;
}

.hero-swiper {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(139,92,246,0.2), 0 10px 30px rgba(0,0,0,0.5);
}

.hero-swiper .swiper-slide img {
  width: 100%;
  height: auto;
  display: block;
}

.hero-swiper .swiper-pagination-bullet {
  background: var(--c-text-sub);
}

.hero-swiper .swiper-pagination-bullet-active {
  background: var(--primary);
}

/* ── Section Common ── */
section {
  padding: 100px 0;
}

section.alt {
  background: var(--c-surface);
}

.section-header {
  text-align: center;
  margin-bottom: 3.5rem;
}

.section-label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--primary);
  margin-bottom: 0.8rem;
  padding: 5px 14px;
  border: 1px solid rgba(139,92,246,0.3);
  border-radius: 50px;
  background: rgba(139,92,246,0.08);
}

.section-title {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 800;
  line-height: 1.3;
}

.section-subtitle {
  font-size: 0.95rem;
  color: var(--c-text-sub);
  margin-top: 0.8rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* Fade-in Animations */
.animate-fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.animate-fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── Problem Section ── */
.problem-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.problem-card {
  padding: 2rem;
  background: var(--c-card);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  text-align: center;
  transition: all var(--transition);
}

.problem-card:hover {
  background: var(--c-card-hover);
  border-color: var(--c-border-hl);
  transform: translateY(-4px);
}

.problem-icon {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.problem-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.problem-card p {
  font-size: 0.9rem;
  color: var(--c-text-sub);
  line-height: 1.6;
}

/* ── Features Section ── */
.features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
}

.feature-card {
  position: relative;
  padding: 2.5rem;
  background: var(--c-card);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition);
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--grad-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}

.feature-card:hover::before { transform: scaleX(1); }

.feature-card:hover {
  background: var(--c-card-hover);
  border-color: var(--c-border-hl);
  transform: translateY(-6px);
  box-shadow: var(--shadow-card);
}

.feature-icon {
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(139,92,246,0.1);
  border-radius: var(--radius-sm);
  margin-bottom: 1.2rem;
  font-size: 1.4rem;
  color: var(--primary);
  transition: all var(--transition);
}

.feature-card:hover .feature-icon {
  background: var(--grad-accent);
  color: white;
  transform: scale(1.1);
}

.feature-name {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 0.6rem;
}

.feature-desc {
  color: var(--c-text-sub);
  font-size: 0.9rem;
  line-height: 1.7;
}

/* ── How It Works ── */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  counter-reset: step;
}

.step-card {
  padding: 2.5rem 2rem;
  background: var(--c-card);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  text-align: center;
  transition: all var(--transition);
  position: relative;
}

.step-card:hover {
  background: var(--c-card-hover);
  border-color: var(--c-border-hl);
  transform: translateY(-4px);
}

.step-number {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--grad-accent);
  color: white;
  font-weight: 800;
  font-size: 1.2rem;
  border-radius: 50%;
  margin: 0 auto 1.2rem;
}

.step-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.step-card p {
  font-size: 0.9rem;
  color: var(--c-text-sub);
  line-height: 1.6;
}

/* ── Plans ── */
.plans-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
  max-width: 800px;
  margin: 0 auto;
}

.plan-card {
  padding: 2.5rem;
  background: var(--c-card);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  text-align: center;
  transition: all var(--transition);
  position: relative;
}

.plan-card.recommended {
  border-color: rgba(139,92,246,0.3);
}

.plan-card.recommended::after {
  content: attr(data-recommend-text);
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  padding: 4px 16px;
  background: var(--grad-accent);
  color: white;
  font-size: 0.75rem;
  font-weight: 700;
  border-radius: 50px;
  white-space: nowrap;
}

.plan-card:hover {
  background: var(--c-card-hover);
  border-color: var(--c-border-hl);
  transform: translateY(-6px);
  box-shadow: var(--shadow-card);
}

.plan-name {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.plan-price {
  font-size: 2rem;
  font-weight: 800;
  background: var(--grad-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 1.5rem;
}

.plan-price small {
  font-size: 0.9rem;
  font-weight: 600;
}

.plan-price-group {
  margin-bottom: 1.5rem;
}

.plan-price-group .plan-price {
  margin-bottom: 0.3rem;
}

.plan-price-alt {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--c-text-sub);
  margin-bottom: 0;
}

.plan-price-alt small {
  font-size: 0.8rem;
}

.plan-save {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--primary);
  margin-left: 4px;
}

.plan-features {
  list-style: none;
  text-align: left;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  margin-bottom: 2rem;
}

.plan-features li {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  color: var(--c-text-sub);
}

.plan-features li i { color: var(--primary); font-size: 0.8rem; }

.plan-cta {
  display: inline-block;
  padding: 10px 28px;
  background: var(--grad-accent);
  color: white;
  font-weight: 600;
  font-size: 0.9rem;
  border-radius: 50px;
  transition: all var(--transition);
}

.plan-cta:hover { transform: translateY(-2px); box-shadow: 0 4px 15px rgba(139,92,246,0.3); color: white; }

/* ── CTA section ── */
.cta-section {
  text-align: center;
  padding: 80px 0;
  background: var(--c-surface);
}

.cta-section h2 {
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  font-weight: 800;
  margin-bottom: 1rem;
}

.cta-section p {
  color: var(--c-text-sub);
  margin-bottom: 2rem;
}

/* ── Footer ── */
footer {
  background: var(--c-bg);
  border-top: 1px solid var(--c-border);
  padding: 40px 0 20px;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-left a {
  font-weight: 700;
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  gap: 8px;
}

.footer-left a i { color: var(--primary); }

.footer-links {
  display: flex;
  gap: 1.5rem;
  list-style: none;
}

.footer-links a {
  font-size: 0.85rem;
  color: var(--c-text-sub);
}

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

.footer-bottom {
  text-align: center;
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--c-border);
  color: var(--c-text-dim);
  font-size: 0.8rem;
}

/* ── Responsive ── */
@media (max-width: 768px) {
  .header-nav { display: none; }
  .mobile-menu-button { display: block; }
  .mobile-menu { display: block; }

  .hero-content {
    grid-template-columns: 1fr;
    text-align: center;
    padding: 2rem 1.5rem;
  }

  .hero-badges { justify-content: center; }
  
  .hero-swiper-wrapper { max-width: 260px; }

  section { padding: 70px 0; }

  .problem-grid { grid-template-columns: 1fr; }
  .features-grid { grid-template-columns: 1fr; }
  .steps-grid { grid-template-columns: 1fr; }
  .plans-grid { grid-template-columns: 1fr; max-width: 400px; }

  .footer-content { flex-direction: column; text-align: center; }
  .footer-links { justify-content: center; }
}