/* ===== Reset & Base ===== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

@font-face {
  font-family: 'Sora';
  src: url('../assets/Sora-Light.ttf') format('truetype');
  font-weight: 300;
}

/* ===== Theme Variables ===== */
:root {
  --accent: #5ebbbd;
  --accent2: #8b5cf6;
  --accent-pink: #e261b7;
  --bg-dark: #0a0a0f;
  --bg-card: rgba(255, 255, 255, 0.04);
  --bg-card-hover: rgba(255, 255, 255, 0.08);
  --border-subtle: rgba(255, 255, 255, 0.06);
  --border-hover: rgba(255, 255, 255, 0.15);
  --text: #e8e8ec;
  --text-muted: #9a9aaa;
  --glow-cyan: rgba(94, 189, 189, 0.35);
  --glow-violet: rgba(139, 92, 246, 0.3);
  --nav-bg: rgba(10, 10, 15, 0.7);
  --nav-bg-scroll: rgba(10, 10, 15, 0.92);
  --modal-bg: linear-gradient(180deg, rgba(30,30,35,0.98), rgba(18,18,22,0.98));
  --modal-overlay: rgba(10, 10, 15, 0.75);
  --scrollbar-track: #0a0a0f;
  --scrollbar-thumb: #333;
  --grid-line: rgba(255,255,255,0.015);
  --orb-opacity: 0.18;
  --badge-free-bg: rgba(94, 189, 189, 0.15);
  --badge-free-color: var(--accent);
  --badge-premium-bg: rgba(139, 92, 246, 0.15);
  --badge-premium-color: var(--accent2);
  --badge-bundle-bg: rgba(226, 97, 183, 0.15);
  --badge-bundle-color: var(--accent-pink);
  --input-bg: rgba(255, 255, 255, 0.05);
  --input-border: rgba(255, 255, 255, 0.1);
  --input-focus-border: var(--accent);
  --success: #22c55e;
  --error: #ef4444;
}

[data-theme="light"] {
  --bg-dark: #f4f5f7;
  --bg-card: rgba(0, 0, 0, 0.03);
  --bg-card-hover: rgba(0, 0, 0, 0.06);
  --border-subtle: rgba(0, 0, 0, 0.08);
  --border-hover: rgba(0, 0, 0, 0.15);
  --text: #1a1a2e;
  --text-muted: #5a5a72;
  --glow-cyan: rgba(94, 189, 189, 0.2);
  --glow-violet: rgba(139, 92, 246, 0.15);
  --nav-bg: rgba(244, 245, 247, 0.8);
  --nav-bg-scroll: rgba(244, 245, 247, 0.95);
  --modal-bg: linear-gradient(180deg, rgba(255,255,255,0.98), rgba(244,245,247,0.98));
  --modal-overlay: rgba(244, 245, 247, 0.75);
  --scrollbar-track: #f4f5f7;
  --scrollbar-thumb: #ccc;
  --grid-line: rgba(0,0,0,0.03);
  --orb-opacity: 0.08;
  --badge-free-bg: rgba(94, 189, 189, 0.12);
  --badge-premium-bg: rgba(139, 92, 246, 0.12);
  --badge-bundle-bg: rgba(226, 97, 183, 0.12);
  --input-bg: rgba(0, 0, 0, 0.03);
  --input-border: rgba(0, 0, 0, 0.12);
}

/* ===== Scrollbar ===== */
html {
  scroll-behavior: smooth;
  scrollbar-width: thin;
  scrollbar-color: var(--scrollbar-thumb) var(--scrollbar-track);
}
html::-webkit-scrollbar { width: 8px; }
html::-webkit-scrollbar-track { background: var(--scrollbar-track); }
html::-webkit-scrollbar-thumb { background: var(--scrollbar-thumb); border-radius: 4px; }

body {
  font-family: 'Sora', system-ui, -apple-system, sans-serif;
  font-weight: 300;
  background: var(--bg-dark);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
  transition: background 0.4s, color 0.4s;
}

a { color: inherit; text-decoration: none; }

/* ===== Animated Background ===== */
.bg-glow {
  position: fixed;
  inset: 0;
  z-index: -1;
  overflow: hidden;
  pointer-events: none;
}
.bg-glow .orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(120px);
  opacity: var(--orb-opacity);
  transition: opacity 0.4s;
}
.bg-glow .orb-1 { width: 600px; height: 600px; background: var(--accent); top: -10%; left: -10%; }
.bg-glow .orb-2 { width: 500px; height: 500px; background: var(--accent2); bottom: -15%; right: -10%; }
.bg-glow .orb-3 { width: 350px; height: 350px; background: var(--accent-pink); top: 50%; left: 50%; }

/* ===== Grid Overlay ===== */
.grid-overlay {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 60px 60px;
}

/* ===== Navigation ===== */
nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--nav-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-subtle);
  transition: background 0.3s;
}
nav.scrolled { background: var(--nav-bg-scroll); }

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--text);
}
.nav-brand img { height: 36px; width: auto; }
.nav-brand span { font-weight: 600; font-size: 1.1rem; letter-spacing: 0.5px; }

.nav-center { display: flex; gap: 2rem; list-style: none; }
.nav-center a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  letter-spacing: 0.3px;
  position: relative;
  transition: color 0.3s;
}
.nav-center a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  border-radius: 1px;
  transition: width 0.3s;
}
.nav-center a:hover { color: var(--text); }
.nav-center a:hover::after { width: 100%; }
.nav-center a.active { color: var(--text); }
.nav-center a.active::after { width: 100%; }

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

/* Theme toggle */
.theme-toggle {
  background: none;
  border: 1px solid var(--border-subtle);
  border-radius: 50%;
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text-muted);
  font-size: 1.1rem;
  transition: border-color 0.3s, color 0.3s, background 0.3s;
}
.theme-toggle:hover {
  border-color: var(--border-hover);
  color: var(--text);
  background: var(--bg-card);
}

/* Nav auth button */
.nav-auth-btn {
  padding: 0.5rem 1.25rem;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: #fff;
  border: none;
  border-radius: 50px;
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  transition: transform 0.25s, box-shadow 0.25s;
  box-shadow: 0 2px 15px var(--glow-cyan);
}
.nav-auth-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 25px var(--glow-cyan);
}

/* Nav user avatar (when logged in) */
.nav-user {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  cursor: pointer;
  color: var(--text);
  text-decoration: none;
  font-size: 0.9rem;
}
.nav-user-avatar {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  font-weight: 600;
  color: #fff;
  overflow: hidden;
}
.nav-user-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 50%;
}

/* Mobile nav toggle */
.nav-toggle { display: none; background: none; border: none; cursor: pointer; padding: 0.25rem; }
.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text);
  margin: 5px 0;
  border-radius: 2px;
  transition: 0.3s;
}

/* ===== Sections ===== */
section {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 6rem 2rem;
  position: relative;
}

.section-label {
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 3px;
  color: var(--accent);
  margin-bottom: 1rem;
}

h1 {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 600;
  line-height: 1.1;
  text-align: center;
  margin-bottom: 1.5rem;
}

h2 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 600;
  text-align: center;
  margin-bottom: 1rem;
}

.subtitle {
  color: var(--text-muted);
  font-size: clamp(1rem, 2vw, 1.25rem);
  text-align: center;
  max-width: 600px;
  margin-bottom: 2.5rem;
}

/* ===== Gradient Text ===== */
.gradient-text {
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ===== Hero ===== */
#hero { padding-top: 8rem; }
.hero-logo {
  width: clamp(100px, 20vw, 180px);
  height: auto;
  margin-bottom: 2rem;
  filter: drop-shadow(0 0 40px var(--glow-cyan));
}

.cta-group { display: flex; gap: 1rem; flex-wrap: wrap; justify-content: center; }

/* ===== Buttons ===== */
.btn-primary {
  padding: 0.85rem 2rem;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: #fff;
  border: none;
  border-radius: 50px;
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: transform 0.25s, box-shadow 0.25s;
  box-shadow: 0 4px 25px var(--glow-cyan);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 40px var(--glow-cyan);
}

.btn-secondary {
  padding: 0.85rem 2rem;
  background: var(--bg-card);
  color: var(--text);
  border: 1px solid var(--border-subtle);
  border-radius: 50px;
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  backdrop-filter: blur(10px);
  transition: transform 0.25s, background 0.25s, border-color 0.25s;
}
.btn-secondary:hover {
  transform: translateY(-2px);
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
}

.btn-sm {
  padding: 0.55rem 1.25rem;
  font-size: 0.85rem;
}

.btn-danger {
  padding: 0.6rem 1.5rem;
  background: rgba(239, 68, 68, 0.1);
  color: var(--error);
  border: 1px solid rgba(239, 68, 68, 0.2);
  border-radius: 50px;
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.25s;
}
.btn-danger:hover { background: rgba(239, 68, 68, 0.2); }

.btn-google {
  padding: 0.75rem 1.5rem;
  background: var(--bg-card);
  color: var(--text);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  width: 100%;
  transition: background 0.25s, border-color 0.25s;
}
.btn-google:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
}
.btn-google svg { width: 20px; height: 20px; flex-shrink: 0; }

.scroll-indicator {
  position: absolute;
  bottom: 2.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-muted);
  font-size: 0.75rem;
  letter-spacing: 2px;
  text-transform: uppercase;
}
.scroll-indicator .arrow {
  width: 20px;
  height: 20px;
  border-right: 2px solid var(--text-muted);
  border-bottom: 2px solid var(--text-muted);
  transform: rotate(45deg);
}

/* ===== Product Cards ===== */
.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  max-width: 1100px;
  width: 100%;
  margin-top: 1rem;
}

.product-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 20px;
  padding: 2rem;
  text-align: center;
  overflow: hidden;
  cursor: pointer;
  transition: transform 0.4s cubic-bezier(0.23, 1, 0.32, 1), border-color 0.4s, box-shadow 0.4s;
  backdrop-filter: blur(12px);
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.product-card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 20px;
  background: linear-gradient(135deg, transparent, rgba(94,189,189,0.05), transparent);
  opacity: 0;
  transition: opacity 0.4s;
}
.product-card:hover {
  transform: translateY(-8px);
  border-color: rgba(94, 189, 189, 0.25);
  box-shadow: 0 20px 60px rgba(94, 189, 189, 0.1);
}
.product-card:hover::before { opacity: 1; }

.product-card img {
  width: 100%;
  max-width: 260px;
  height: auto;
  border-radius: 12px;
  margin-bottom: 1.25rem;
  transition: transform 0.4s;
}
.product-card:hover img { transform: scale(1.03); }

.product-card h3 {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}
.product-card p {
  color: var(--text-muted);
  font-size: 0.88rem;
  line-height: 1.55;
  flex: 1;
}

.product-badge {
  display: inline-block;
  padding: 0.3rem 0.8rem;
  border-radius: 50px;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 1rem;
}
.badge-free { background: var(--badge-free-bg); color: var(--badge-free-color); }
.badge-premium { background: var(--badge-premium-bg); color: var(--badge-premium-color); }
.badge-bundle { background: var(--badge-bundle-bg); color: var(--badge-bundle-color); }

.product-price {
  font-size: 1.25rem;
  font-weight: 600;
  margin-top: 0.75rem;
  color: var(--text);
}
.product-price .original {
  text-decoration: line-through;
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 400;
  margin-right: 0.5rem;
}
.product-price .discount-tag {
  display: inline-block;
  background: rgba(34, 197, 94, 0.15);
  color: var(--success);
  font-size: 0.7rem;
  font-weight: 600;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  margin-left: 0.5rem;
}
.product-price-sub {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 0.2rem;
}

.card-arrow {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  margin-top: 1rem;
  font-size: 0.85rem;
  color: var(--accent);
  transition: gap 0.3s;
}
.product-card:hover .card-arrow { gap: 0.75rem; }

/* NuClear bundle hero card */
.product-card.card-featured {
  border-color: rgba(226, 97, 183, 0.2);
  background: linear-gradient(135deg, rgba(139,92,246,0.05), rgba(226,97,183,0.05));
}
.product-card.card-featured:hover {
  border-color: rgba(226, 97, 183, 0.35);
  box-shadow: 0 20px 60px rgba(226, 97, 183, 0.1);
}

/* ===== Product Filter Tabs ===== */
.filter-tabs {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  justify-content: center;
  margin-bottom: 2.5rem;
}
.filter-tab {
  padding: 0.5rem 1.25rem;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 50px;
  color: var(--text-muted);
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.25s;
}
.filter-tab:hover {
  border-color: var(--border-hover);
  color: var(--text);
}
.filter-tab.active {
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: #fff;
  border-color: transparent;
}

/* ===== Features Section ===== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
  max-width: 1000px;
  width: 100%;
}

.feature-item {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 16px;
  padding: 2rem;
  backdrop-filter: blur(10px);
  transition: transform 0.3s, border-color 0.3s;
}
.feature-item:hover {
  transform: translateY(-4px);
  border-color: var(--border-hover);
}

.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  margin-bottom: 1rem;
}
.icon-cyan  { background: rgba(94, 189, 189, 0.12); }
.icon-violet { background: rgba(139, 92, 246, 0.12); }
.icon-pink  { background: rgba(226, 97, 183, 0.12); }

.feature-item h3 { font-size: 1.05rem; font-weight: 600; margin-bottom: 0.5rem; }
.feature-item p { color: var(--text-muted); font-size: 0.88rem; }

/* ===== About Section ===== */
#about { min-height: 70vh; }
.about-content {
  max-width: 700px;
  text-align: center;
}
.about-content p {
  color: var(--text-muted);
  font-size: 1.05rem;
  line-height: 1.7;
  margin-bottom: 1.5rem;
}

/* ===== Footer ===== */
footer {
  text-align: center;
  padding: 2.5rem 2rem;
  border-top: 1px solid var(--border-subtle);
  color: var(--text-muted);
  font-size: 0.85rem;
}
footer a { color: var(--accent); text-decoration: none; }
footer a:hover { text-decoration: underline; }

/* ===== Horizontal Divider ===== */
.section-divider {
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  border-radius: 3px;
  margin: 0 auto 2rem;
}

/* ===== Forms ===== */
.form-group {
  margin-bottom: 1.25rem;
  text-align: left;
}
.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 0.5rem;
  color: var(--text);
}
.form-group input {
  width: 100%;
  padding: 0.75rem 1rem;
  background: var(--input-bg);
  border: 1px solid var(--input-border);
  border-radius: 12px;
  color: var(--text);
  font-family: inherit;
  font-size: 0.95rem;
  transition: border-color 0.25s, box-shadow 0.25s;
  outline: none;
}
.form-group input:focus {
  border-color: var(--input-focus-border);
  box-shadow: 0 0 0 3px rgba(94, 189, 189, 0.15);
}
.form-group input::placeholder { color: var(--text-muted); }

.form-error {
  color: var(--error);
  font-size: 0.8rem;
  margin-top: 0.4rem;
  display: none;
}
.form-error.visible { display: block; }

.auth-divider {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin: 1.5rem 0;
  color: var(--text-muted);
  font-size: 0.8rem;
}
.auth-divider::before,
.auth-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border-subtle);
}

/* ===== Auth Card ===== */
.auth-container {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 6rem 1.5rem 2rem;
}
.auth-card {
  width: min(440px, 100%);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 24px;
  padding: 2.5rem;
  backdrop-filter: blur(20px);
}
.auth-card h1 {
  font-size: 1.8rem;
  margin-bottom: 0.5rem;
}
.auth-card .subtitle {
  margin-bottom: 2rem;
  font-size: 0.95rem;
}
.auth-card .btn-primary { width: 100%; justify-content: center; }
.auth-toggle {
  text-align: center;
  margin-top: 1.5rem;
  font-size: 0.88rem;
  color: var(--text-muted);
}
.auth-toggle a {
  color: var(--accent);
  font-weight: 500;
  cursor: pointer;
}
.auth-toggle a:hover { text-decoration: underline; }

/* Global alert message */
.alert {
  padding: 0.75rem 1rem;
  border-radius: 12px;
  font-size: 0.88rem;
  margin-bottom: 1.25rem;
  display: none;
}
.alert.visible { display: block; }
.alert-success {
  background: rgba(34, 197, 94, 0.1);
  border: 1px solid rgba(34, 197, 94, 0.2);
  color: var(--success);
}
.alert-error {
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.2);
  color: var(--error);
}

/* ===== Account Page ===== */
.account-container {
  max-width: 900px;
  width: 100%;
  margin: 0 auto;
  padding: 7rem 1.5rem 3rem;
}
.account-header {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  margin-bottom: 2.5rem;
  flex-wrap: wrap;
}
.account-avatar {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  font-weight: 600;
  color: #fff;
  flex-shrink: 0;
  overflow: hidden;
}
.account-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 50%;
}
.account-info h1 {
  font-size: 1.6rem;
  text-align: left;
  margin-bottom: 0.25rem;
}
.account-info p {
  color: var(--text-muted);
  font-size: 0.92rem;
}

.account-section {
  margin-bottom: 2.5rem;
}
.account-section h2 {
  font-size: 1.2rem;
  text-align: left;
  margin-bottom: 1rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border-subtle);
}

.download-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
}
.download-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 16px;
  padding: 1rem 1.25rem;
  transition: border-color 0.3s;
}
.download-item:hover { border-color: var(--border-hover); }
.download-item img {
  width: 48px;
  height: 48px;
  border-radius: 10px;
  object-fit: cover;
}
.download-item-info { flex: 1; }
.download-item-info h4 { font-size: 0.95rem; font-weight: 600; margin-bottom: 0.15rem; }
.download-item-info p { font-size: 0.78rem; color: var(--text-muted); }
.download-item .btn-sm { flex-shrink: 0; }

/* ===== Product Detail Page ===== */
.detail-container {
  max-width: 1000px;
  width: 100%;
  margin: 0 auto;
  padding: 7rem 1.5rem 3rem;
}
.detail-hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
  margin-bottom: 3rem;
}
.detail-hero img {
  width: 100%;
  border-radius: 20px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.3);
}
.detail-info h1 {
  text-align: left;
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  margin-bottom: 0.75rem;
}
.detail-info .product-badge { margin-bottom: 1rem; }
.detail-info .description {
  color: var(--text-muted);
  font-size: 1rem;
  line-height: 1.7;
  margin-bottom: 1.5rem;
}
.detail-pricing {
  margin-bottom: 1.5rem;
}
.detail-pricing .price-main {
  font-size: 2rem;
  font-weight: 600;
}
.detail-pricing .price-original {
  text-decoration: line-through;
  color: var(--text-muted);
  font-size: 1.1rem;
  margin-right: 0.5rem;
}
.detail-pricing .price-sub {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

.bundle-includes {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 16px;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}
.bundle-includes h3 {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
}
.bundle-includes ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.bundle-includes li {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  color: var(--text-muted);
}
.bundle-includes li .check {
  color: var(--success);
  font-weight: 700;
}
.bundle-includes li .bonus-tag {
  font-size: 0.7rem;
  background: rgba(34, 197, 94, 0.15);
  color: var(--success);
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
  font-weight: 600;
}

/* ===== Modal ===== */
.modal-overlay {
  position: fixed;
  inset: 0;
  display: none;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s, visibility 0.3s;
  align-items: center;
  justify-content: center;
  z-index: 4000;
  background: var(--modal-overlay);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  padding: 1rem;
}
.modal-overlay.active { display: flex; opacity: 1; visibility: visible; }
.modal-card {
  width: min(520px, 95%);
  background: var(--modal-bg);
  border: 1px solid var(--border-subtle);
  border-radius: 20px;
  padding: 2.5rem;
  color: var(--text);
  box-shadow: 0 0 60px rgba(94, 189, 189, 0.1);
  text-align: center;
}
.modal-card img { height: 56px; margin-bottom: 1.25rem; }
.modal-card h3 { font-size: 1.3rem; margin-bottom: 0.5rem; }
.modal-card p { color: var(--text-muted); font-size: 0.92rem; line-height: 1.6; margin-bottom: 1.5rem; }

/* ===== Scroll Reveal ===== */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s cubic-bezier(0.23, 1, 0.32, 1), transform 0.8s cubic-bezier(0.23, 1, 0.32, 1);
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* ===== Loading Spinner ===== */
.spinner {
  width: 24px;
  height: 24px;
  border: 2px solid var(--border-subtle);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
  margin: 0 auto;
}
@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ===== Utility ===== */
.text-center { text-align: center; }
.text-muted { color: var(--text-muted); }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mb-2 { margin-bottom: 1rem; }
.hidden { display: none !important; }

/* ===== Responsive ===== */
@media (max-width: 768px) {
  nav { padding: 0.75rem 1.25rem; }
  .nav-center { display: none; }
  .nav-center.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--nav-bg-scroll);
    backdrop-filter: blur(20px);
    padding: 1.5rem 2rem;
    gap: 1.25rem;
    border-bottom: 1px solid var(--border-subtle);
  }
  .nav-toggle { display: block; }
  .nav-right .nav-auth-btn span { display: none; }
  section { padding: 5rem 1.25rem; }
  .products-grid { grid-template-columns: 1fr; gap: 1.25rem; }
  .features-grid { grid-template-columns: 1fr; }
  .cta-group { flex-direction: column; align-items: center; }
  .detail-hero { grid-template-columns: 1fr; gap: 2rem; }
  .detail-info h1 { text-align: center; }
  .detail-info { text-align: center; }
  .account-header { justify-content: center; text-align: center; }
  .account-info h1 { text-align: center; }
  .download-list { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .auth-card { padding: 1.75rem; }
  .filter-tabs { gap: 0.35rem; }
  .filter-tab { padding: 0.4rem 1rem; font-size: 0.8rem; }
}