/* 
  Design Theme: Zen Productivity / Eco-Stream
  Base: Ivory (#fcfbf7)
  Primary: Emerald Green (#10b981)
  Secondary: Indigo Depth (#312e81)
  Accent: Ochre Gold (#d97706)
*/

:root {
  --bg-ivory: #fcfbf7;
  --bg-white: #ffffff;
  --primary: #10b981;
  --primary-dark: #059669;
  --secondary: #312e81;
  --accent: #d97706;
  --text-main: #1f2937;
  --text-muted: #6b7280;
  --border-light: #e5e7eb;
  --shadow-soft: 0 4px 20px rgba(0,0,0,0.05);
  --glass: rgba(255, 255, 255, 0.8);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body { 
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; 
  background-color: var(--bg-ivory);
  color: var(--text-main);
  line-height: 1.6;
  overflow-x: hidden;
}

.wrap { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* Navigation */
.zen-nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: var(--glass); backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-light);
  height: 72px;
}
.nav-inner {
  height: 100%; display: flex; align-items: center; justify-content: space-between;
}
.nav-brand { display: flex; align-items: center; text-decoration: none; color: var(--secondary); font-weight: 800; font-size: 20px; }
.nav-brand svg { margin-right: 8px; width: 32px; height: 32px; }

.nav-links { display: flex; gap: 32px; list-style: none; }
.nav-links a { text-decoration: none; color: var(--text-muted); font-weight: 500; transition: all 0.3s; position: relative; padding: 8px 0; }
.nav-links a:hover { color: var(--primary); }
.nav-links a.active { color: var(--primary); }
.nav-links a.active::after {
  content: ''; position: absolute; bottom: 0; left: 0; right: 0; height: 3px; background: var(--primary); border-radius: 2px;
}

.nav-dl-btn {
  background: var(--primary); color: white; padding: 10px 24px; border-radius: 50px;
  text-decoration: none; font-weight: 600; font-size: 14px; transition: all 0.3s;
  border: none; cursor: pointer; display: flex; align-items: center;
}
.nav-dl-btn:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3); }

.nav-mob-btn { display: none; background: none; border: none; cursor: pointer; padding: 4px; }

/* Hero Section */
.hero { padding: 160px 0 100px; text-align: center; position: relative; overflow: hidden; }
.hero::before {
  content: ''; position: absolute; top: -10%; right: -10%; width: 40%; height: 60%;
  background: radial-gradient(circle, rgba(16, 185, 129, 0.1) 0%, transparent 70%); z-index: -1;
}
.hero::after {
  content: ''; position: absolute; bottom: -10%; left: -10%; width: 30%; height: 50%;
  background: radial-gradient(circle, rgba(49, 46, 129, 0.05) 0%, transparent 70%); z-index: -1;
}

.hero-tag {
  display: inline-flex; align-items: center; background: rgba(16, 185, 129, 0.1); color: var(--primary-dark);
  padding: 6px 16px; border-radius: 100px; font-size: 14px; font-weight: 600; margin-bottom: 24px;
}
.hero-tag span { width: 8px; height: 8px; background: var(--primary); border-radius: 50%; margin-right: 8px; }

.hero-title { font-size: 64px; line-height: 1.1; font-weight: 800; color: var(--secondary); margin-bottom: 24px; letter-spacing: -1px; }
.hero-title span { color: var(--primary); }
.hero-p { font-size: 20px; color: var(--text-muted); max-width: 700px; margin: 0 auto 48px; }

.hero-btns { display: flex; justify-content: center; gap: 20px; }
.btn { 
  display: inline-flex; align-items: center; justify-content: center;
  padding: 16px 36px; border-radius: 12px; font-weight: 700; font-size: 18px; 
  cursor: pointer; transition: all 0.3s; border: none; text-decoration: none;
}
.btn-primary { background: var(--primary); color: white; }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-3px); box-shadow: 0 10px 20px rgba(16, 185, 129, 0.2); }
.btn-outline { background: transparent; color: var(--secondary); border: 2px solid var(--border-light); }
.btn-outline:hover { border-color: var(--secondary); background: rgba(49, 46, 129, 0.03); transform: translateY(-3px); }

/* Features Grid */
.sec { padding: 100px 0; }
.sec-head { text-align: center; margin-bottom: 64px; }
.sec-label { color: var(--primary); font-weight: 700; text-transform: uppercase; letter-spacing: 2px; font-size: 14px; margin-bottom: 12px; display: block; }
.sec-title { font-size: 42px; font-weight: 800; color: var(--secondary); margin-bottom: 16px; }
.sec-sub { font-size: 18px; color: var(--text-muted); max-width: 600px; margin: 0 auto; }

.feat-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
.feat-card {
  background: var(--bg-white); padding: 48px 32px; border-radius: 24px; 
  transition: all 0.4s; border: 1px solid transparent; position: relative;
}
.feat-card:hover { 
  transform: translateY(-8px); box-shadow: 0 20px 40px rgba(0,0,0,0.04);
  border-color: rgba(16, 185, 129, 0.2);
}
.feat-card svg { width: 56px; height: 56px; margin-bottom: 24px; color: var(--primary); }
.feat-title { font-size: 24px; font-weight: 700; color: var(--secondary); margin-bottom: 16px; }
.feat-desc { color: var(--text-muted); font-size: 16px; line-height: 1.7; }

/* Deep Dive Section */
.sec-deep { background: #f0fdf4; }
.deep-row { display: flex; align-items: center; gap: 80px; margin-bottom: 100px; }
.deep-row.rev { flex-direction: row-reverse; }
.deep-row:last-child { margin-bottom: 0; }
.deep-info { flex: 1; }
.deep-visual { flex: 1.2; background: white; border-radius: 32px; padding: 40px; box-shadow: 0 20px 60px rgba(0,0,0,0.03); }

.deep-tag { color: var(--primary); font-weight: 700; font-size: 14px; margin-bottom: 16px; display: block; }
.deep-h3 { font-size: 36px; font-weight: 800; color: var(--secondary); margin-bottom: 24px; }
.deep-p { font-size: 18px; color: var(--text-muted); margin-bottom: 32px; }
.deep-list { list-style: none; }
.deep-list-item { display: flex; align-items: flex-start; margin-bottom: 16px; font-size: 16px; }
.deep-list-item svg { width: 24px; height: 24px; color: var(--primary); margin-right: 12px; flex-shrink: 0; margin-top: 2px; }

/* Stats Band */
.stats-band { background: var(--secondary); color: white; padding: 80px 0; text-align: center; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 40px; }
.stat-item h4 { font-size: 48px; font-weight: 800; color: var(--primary); margin-bottom: 8px; }
.stat-item p { font-size: 16px; opacity: 0.8; }

/* Platform Grid */
.plat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.plat-card {
  background: white; padding: 40px; border-radius: 20px; text-align: center; border: 1px solid var(--border-light);
  transition: all 0.3s;
}
.plat-card:hover { border-color: var(--primary); transform: translateY(-5px); }
.plat-icon { width: 64px; height: 64px; margin: 0 auto 24px; color: var(--text-main); }
.plat-name { font-size: 20px; font-weight: 700; margin-bottom: 12px; }
.plat-btn { 
  display: block; width: 100%; padding: 12px; border-radius: 8px; border: 1px solid var(--border-light);
  text-decoration: none; color: var(--text-main); font-weight: 600; font-size: 14px; transition: all 0.3s;
  cursor: pointer; background: white;
}
.plat-btn:hover { background: var(--secondary); color: white; border-color: var(--secondary); }

/* Comparison Table */
.cmp-wrap { overflow-x: auto; background: white; border-radius: 24px; border: 1px solid var(--border-light); }
.cmp-table { width: 100%; border-collapse: collapse; min-width: 800px; }
.cmp-table th, .cmp-table td { padding: 24px; text-align: left; border-bottom: 1px solid var(--border-light); }
.cmp-table th { background: #f9fafb; font-weight: 700; color: var(--secondary); }
.cmp-table .hl { background: rgba(16, 185, 129, 0.05); color: var(--primary-dark); font-weight: 700; text-align: center; }
.cmp-table td:not(:first-child) { text-align: center; }
.check-icon { color: var(--primary); width: 20px; height: 20px; }
.cross-icon { color: #ef4444; width: 20px; height: 20px; }

/* Reviews */
.rev-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
.rev-card { background: white; padding: 32px; border-radius: 20px; border: 1px solid var(--border-light); }
.rev-stars { display: flex; gap: 4px; margin-bottom: 16px; color: #fbbf24; }
.rev-stars svg { width: 18px; height: 18px; fill: currentColor; }
.rev-text { font-style: italic; color: var(--text-muted); margin-bottom: 24px; font-size: 15px; }
.rev-user { display: flex; align-items: center; gap: 12px; }
.rev-avatar { width: 44px; height: 44px; border-radius: 50%; background: #e5e7eb; display: flex; align-items: center; justify-content: center; font-weight: 700; color: var(--secondary); }
.rev-name { font-weight: 700; font-size: 16px; }

/* FAQ */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item { background: white; border: 1px solid var(--border-light); border-radius: 12px; margin-bottom: 16px; overflow: hidden; }
.faq-q { padding: 24px; display: flex; justify-content: space-between; align-items: center; cursor: pointer; font-weight: 700; color: var(--secondary); }
.faq-chevron { transition: transform 0.3s; width: 20px; height: 20px; }
.faq-a { max-height: 0; transition: all 0.3s ease; padding: 0 24px; overflow: hidden; color: var(--text-muted); }
.faq-item.open .faq-a { max-height: 300px; padding-bottom: 24px; }
.faq-item.open .faq-chevron { transform: rotate(180deg); }

/* Footer */
.zen-footer { background: #f3f4f6; padding: 60px 0 40px; border-top: 1px solid var(--border-light); }
.footer-inner { text-align: center; }
.footer-sec-line { display: flex; justify-content: center; align-items: center; gap: 8px; font-weight: 700; color: var(--primary-dark); margin-bottom: 12px; }
.footer-sec-line svg { width: 20px; height: 20px; }
.footer-copy { color: var(--text-muted); font-size: 14px; max-width: 800px; margin: 0 auto; }

/* Animations */
@keyframes spin { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }

/* Mobile Menu */
@media (max-width: 768px) {
  .nav-links { display: none; position: absolute; top: 72px; left: 0; right: 0; background: white; flex-direction: column; padding: 20px; gap: 15px; box-shadow: 0 10px 20px rgba(0,0,0,0.1); }
  .nav-links.show { display: flex; }
  .nav-mob-btn { display: block; }
  .hero-title { font-size: 40px; }
  .feat-grid, .stats-grid, .plat-grid, .rev-grid { grid-template-columns: 1fr; }
  .deep-row, .deep-row.rev { flex-direction: column; gap: 40px; }
}

/* Download Page Specific */
.dl-main-card { background: white; border-radius: 32px; padding: 60px; border: 1px solid var(--border-light); display: flex; align-items: center; gap: 60px; box-shadow: 0 30px 60px rgba(0,0,0,0.03); margin-top: -60px; position: relative; z-index: 10; }
.dl-main-info { flex: 1; }
.dl-main-vis { flex: 1; text-align: center; }
.dl-main-vis svg { width: 100%; max-width: 400px; height: auto; }
.dl-badge { display: inline-block; background: var(--secondary); color: white; padding: 4px 12px; border-radius: 4px; font-size: 12px; font-weight: 700; margin-bottom: 16px; text-transform: uppercase; }
.dl-specs { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; margin: 24px 0; }
.dl-spec { font-size: 14px; color: var(--text-muted); }
.dl-spec strong { color: var(--text-main); }

.guide-steps { display: grid; grid-template-columns: repeat(5, 1fr); gap: 20px; }
.gstep { text-align: center; }
.gstep-num { width: 40px; height: 40px; background: var(--primary); color: white; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: 800; margin: 0 auto 16px; }
.gstep-title { font-weight: 700; margin-bottom: 8px; font-size: 16px; }
.gstep-desc { font-size: 14px; color: var(--text-muted); }

.ver-list { max-width: 900px; margin: 0 auto; }
.ver-item { display: flex; gap: 24px; padding-bottom: 40px; position: relative; }
.ver-item::before { content: ''; position: absolute; left: 60px; top: 20px; bottom: 0; width: 2px; background: var(--border-light); }
.ver-item:last-child::before { display: none; }
.ver-date { width: 120px; text-align: right; color: var(--text-muted); font-weight: 600; font-size: 14px; padding-top: 4px; }
.ver-dot { width: 12px; height: 12px; background: var(--primary); border-radius: 50%; margin-top: 10px; z-index: 1; border: 3px solid var(--bg-ivory); box-shadow: 0 0 0 4px var(--bg-ivory); }
.ver-content { flex: 1; background: white; padding: 24px; border-radius: 16px; border: 1px solid var(--border-light); }
.ver-num { font-weight: 800; color: var(--secondary); font-size: 18px; margin-bottom: 8px; }
.ver-txt { font-size: 14px; color: var(--text-muted); }

/* Article Page Specific */
.art-hero { background: var(--secondary); color: white; padding: 120px 0 80px; text-align: center; }
.art-layout { display: grid; grid-template-columns: 1fr 300px; gap: 40px; padding: 60px 0; }
.art-body { background: white; padding: 48px; border-radius: 24px; border: 1px solid var(--border-light); }
.art-body h2 { font-size: 32px; color: var(--secondary); margin: 40px 0 20px; }
.art-body h2:first-child { margin-top: 0; }
.art-body p { margin-bottom: 20px; color: var(--text-main); font-size: 17px; line-height: 1.8; }
.art-body ul { margin-bottom: 24px; list-style: none; }
.art-body li { padding-left: 28px; position: relative; margin-bottom: 12px; }
.art-body li::before { content: '✓'; position: absolute; left: 0; color: var(--primary); font-weight: 800; }

.sidebar { position: sticky; top: 100px; height: fit-content; }
.sbox { background: white; padding: 24px; border-radius: 16px; border: 1px solid var(--border-light); margin-bottom: 24px; }
.sbox-title { font-size: 18px; font-weight: 700; margin-bottom: 16px; color: var(--secondary); border-left: 4px solid var(--primary); padding-left: 12px; }
.stoc { list-style: none; }
.stoc li { margin-bottom: 10px; }
.stoc a { text-decoration: none; color: var(--text-muted); font-size: 14px; transition: color 0.3s; }
.stoc a:hover { color: var(--primary); }

.kw-strip { display: flex; flex-wrap: wrap; gap: 10px; margin: 30px 0; justify-content: center; }
.kw { background: #f3f4f6; color: var(--text-muted); padding: 6px 16px; border-radius: 4px; font-size: 13px; font-weight: 500; }

.cta-box { background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%); color: white; padding: 40px; border-radius: 20px; text-align: center; margin: 60px 0; }
.cta-box h3 { font-size: 28px; margin-bottom: 16px; }
.cta-box p { margin-bottom: 32px; opacity: 0.9; }
.btn-white { background: white; color: var(--primary-dark); }
.btn-white:hover { transform: translateY(-3px); box-shadow: 0 10px 20px rgba(0,0,0,0.1); }