/* ══════════════════════════════════════════════════════════
   Kardopal Landing Page — Premium Modern Design
   ══════════════════════════════════════════════════════════ */

:root {
  --blue: #3B82F6;
  --blue-dark: #1D4ED8;
  --blue-light: #EFF6FF;
  --purple: #8B5CF6;
  --pink: #EC4899;
  --green: #10B981;
  --orange: #F59E0B;
  --red: #EF4444;
  --text: #0F172A;
  --text-secondary: #475569;
  --text-tertiary: #94A3B8;
  --border: #E2E8F0;
  --bg: #FFFFFF;
  --bg-alt: #F8FAFC;
  --radius: 16px;
  --radius-sm: 10px;
  --radius-lg: 24px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

/* ── Buttons ── */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  font-weight: 600; font-size: 15px; text-decoration: none;
  border-radius: 12px; transition: all .2s; cursor: pointer; border: none;
}
.btn-sm { padding: 8px 18px; font-size: 14px; }
.btn-lg { padding: 14px 28px; font-size: 16px; }
.btn-primary { background: var(--blue); color: #fff; }
.btn-primary:hover { background: var(--blue-dark); transform: translateY(-1px); box-shadow: 0 8px 24px rgba(59,130,246,.3); }
.btn-outline { background: transparent; color: var(--text); border: 1.5px solid var(--border); }
.btn-outline:hover { border-color: var(--blue); color: var(--blue); }
.btn-ghost { background: transparent; color: var(--text-secondary); }
.btn-ghost:hover { color: var(--blue); }
.btn-white { background: #fff; color: var(--blue-dark); }
.btn-white:hover { transform: translateY(-1px); box-shadow: 0 8px 24px rgba(0,0,0,.15); }
.btn-block { display: flex; justify-content: center; width: 100%; }

/* ── Nav ── */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  padding: 16px 0;
  transition: all .3s;
}
.nav-scrolled {
  background: rgba(255,255,255,.92); backdrop-filter: blur(20px);
  box-shadow: 0 1px 3px rgba(0,0,0,.06);
  padding: 10px 0;
}
.nav-inner {
  max-width: 1200px; margin: 0 auto; padding: 0 24px;
  display: flex; align-items: center; gap: 32px;
}
.nav-logo { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.nav-logo-img { width: 40px; height: 40px; border-radius: 12px; object-fit: contain; }
.nav-logo-text { font-weight: 800; font-size: 20px; color: var(--text); letter-spacing: -.3px; }
.nav-links { display: flex; gap: 28px; flex: 1; justify-content: center; }
.nav-links a { color: var(--text-secondary); text-decoration: none; font-size: 14px; font-weight: 500; transition: color .2s; }
.nav-links a:hover { color: var(--blue); }
.nav-actions { display: flex; gap: 8px; }
.nav-mobile-toggle { display: none; background: none; border: none; color: var(--text); cursor: pointer; }

/* ── Hero ── */
.hero {
  position: relative;
  padding: 160px 0 100px;
  text-align: center;
  overflow: hidden;
}
.hero-bg-shapes { position: absolute; inset: 0; pointer-events: none; }
.hero-shape {
  position: absolute; border-radius: 50%;
  filter: blur(80px); opacity: .15;
}
.hero-shape-1 { width: 600px; height: 600px; background: var(--blue); top: -200px; right: -200px; }
.hero-shape-2 { width: 500px; height: 500px; background: var(--purple); bottom: -100px; left: -200px; }
.hero-shape-3 { width: 300px; height: 300px; background: var(--pink); top: 50%; left: 50%; transform: translate(-50%, -50%); }
.hero-inner { position: relative; z-index: 1; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--blue-light); color: var(--blue-dark);
  padding: 8px 18px; border-radius: 100px;
  font-size: 13px; font-weight: 600; margin-bottom: 28px;
}
.hero-title {
  font-size: clamp(36px, 6vw, 64px); font-weight: 900;
  line-height: 1.1; letter-spacing: -1.5px; margin-bottom: 20px;
}
.hero-title-gradient {
  background: linear-gradient(135deg, var(--blue), var(--purple), var(--pink));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-sub {
  font-size: 18px; color: var(--text-secondary);
  max-width: 640px; margin: 0 auto 36px; line-height: 1.7;
}
.hero-cta { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; margin-bottom: 48px; }
.hero-pills { display: flex; gap: 8px; justify-content: center; flex-wrap: wrap; }
.hero-pill {
  display: inline-flex; align-items: center; gap: 6px;
  background: #fff; border: 1px solid var(--border);
  padding: 6px 14px; border-radius: 100px;
  font-size: 13px; font-weight: 600; color: var(--text-secondary);
  box-shadow: 0 1px 3px rgba(0,0,0,.04);
}
.hero-pill svg { color: var(--blue); }

/* ── Stats ── */
.stats { padding: 60px 0; background: var(--bg-alt); }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.stat-card { text-align: center; padding: 24px; }
.stat-number { font-size: 36px; font-weight: 900; color: var(--blue); letter-spacing: -1px; }
.stat-label { font-size: 14px; color: var(--text-secondary); font-weight: 500; margin-top: 4px; }

/* ── Section Header ── */
.section-header { text-align: center; margin-bottom: 56px; }
.section-badge {
  display: inline-block;
  background: var(--blue-light); color: var(--blue-dark);
  padding: 6px 16px; border-radius: 100px;
  font-size: 13px; font-weight: 700; margin-bottom: 16px;
  letter-spacing: .3px;
}
.section-title { font-size: clamp(28px, 4vw, 44px); font-weight: 900; line-height: 1.15; letter-spacing: -.8px; }
.section-sub { font-size: 17px; color: var(--text-secondary); max-width: 560px; margin: 12px auto 0; line-height: 1.6; }

/* ── Features ── */
.features { padding: 100px 0; }
.features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.feature-card {
  background: var(--bg-alt); border-radius: var(--radius);
  padding: 32px; border: 1px solid transparent;
  transition: all .3s;
}
.feature-card:hover { border-color: var(--border); box-shadow: 0 8px 32px rgba(0,0,0,.06); transform: translateY(-4px); }
.feature-card-lg { grid-column: span 1; }
.feature-icon {
  width: 52px; height: 52px; border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 18px;
}
.feature-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 8px; }
.feature-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.6; }

/* ── Modules ── */
.modules { padding: 100px 0; background: var(--bg-alt); }
.modules-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; }
.module-card {
  background: #fff; border-radius: var(--radius); padding: 28px 20px;
  text-align: center; border: 1px solid var(--border);
  transition: all .3s;
}
.module-card:hover { border-color: var(--blue); box-shadow: 0 8px 24px rgba(59,130,246,.1); transform: translateY(-4px); }
.module-icon {
  width: 48px; height: 48px; border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 14px;
}
.mi-blue { background: #EFF6FF; color: #3B82F6; }
.mi-purple { background: #F5F3FF; color: #8B5CF6; }
.mi-green { background: #F0FDF4; color: #10B981; }
.mi-orange { background: #FFFBEB; color: #F59E0B; }
.mi-red { background: #FEF2F2; color: #EF4444; }
.mi-teal { background: #F0FDFA; color: #14B8A6; }
.mi-indigo { background: #EEF2FF; color: #6366F1; }
.mi-pink { background: #FDF2F8; color: #EC4899; }
.mi-cyan { background: #ECFEFF; color: #06B6D4; }
.mi-amber { background: #FFFBEB; color: #D97706; }
.module-card h4 { font-size: 15px; font-weight: 700; margin-bottom: 6px; }
.module-card p { font-size: 12px; color: var(--text-tertiary); line-height: 1.5; }

/* ── Circle Hub ── */
.circle-section { padding: 100px 0; }
.circle-split { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.circle-features { margin-top: 32px; display: flex; flex-direction: column; gap: 14px; }
.circle-feat { display: flex; align-items: center; gap: 12px; font-size: 15px; color: var(--text-secondary); font-weight: 500; }
.circle-visual { position: relative; min-height: 320px; }
.circle-card-stack { position: relative; }
.cv-card {
  background: #fff; border-radius: var(--radius); padding: 18px 20px;
  display: flex; align-items: center; gap: 14px;
  border: 1px solid var(--border);
  box-shadow: 0 4px 16px rgba(0,0,0,.06);
  position: absolute; width: 100%;
  transition: all .3s;
}
.cv-card-1 { top: 0; left: 0; z-index: 3; }
.cv-card-2 { top: 72px; left: 24px; z-index: 2; opacity: .85; }
.cv-card-3 { top: 144px; left: 48px; z-index: 1; opacity: .7; }
.cv-avatar { width: 40px; height: 40px; border-radius: 12px; flex-shrink: 0; }
.cv-name { font-size: 14px; font-weight: 700; color: var(--text); }
.cv-time { font-size: 12px; color: var(--text-tertiary); margin-top: 2px; }

/* ── AI Section ── */
.ai-section { padding: 100px 0; background: var(--bg-alt); }
.ai-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.ai-card {
  background: #fff; border-radius: var(--radius); padding: 28px;
  border: 1px solid var(--border); transition: all .3s;
}
.ai-card:hover { border-color: var(--blue); box-shadow: 0 8px 24px rgba(59,130,246,.1); transform: translateY(-4px); }
.ai-card-icon {
  width: 48px; height: 48px; border-radius: 14px;
  background: var(--blue-light); display: flex; align-items: center; justify-content: center;
  margin-bottom: 16px;
}
.ai-card h4 { font-size: 16px; font-weight: 700; margin-bottom: 8px; }
.ai-card p { font-size: 13px; color: var(--text-secondary); line-height: 1.6; }

/* ── IoT Section ── */
.iot-section { padding: 100px 0; }
.iot-split { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.iot-visual {
  background: linear-gradient(135deg, #0F172A, #1E293B);
  border-radius: var(--radius-lg); padding: 60px;
  position: relative; min-height: 340px;
}
.iot-grid-visual { position: relative; width: 100%; height: 220px; }
.iot-node {
  position: absolute; width: 56px; height: 56px; border-radius: 16px;
  display: flex; align-items: center; justify-content: center;
}
.iot-n1 { background: var(--blue); top: 0; left: 20%; }
.iot-n2 { background: var(--purple); top: 0; right: 20%; }
.iot-n3 { background: var(--green); bottom: 0; left: 10%; }
.iot-n4 { background: var(--orange); bottom: 0; right: 10%; }
.iot-line {
  position: absolute; background: rgba(255,255,255,.1);
  height: 2px; transform-origin: left;
}
.iot-l1 { width: 200px; top: 28px; left: calc(20% + 56px); }
.iot-l2 { width: 120px; top: 100px; left: calc(10% + 28px); transform: rotate(60deg); }
.iot-l3 { width: 120px; top: 100px; right: calc(10% + 28px); transform: rotate(-60deg); }
.iot-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 28px; }
.iot-tags span {
  background: var(--bg-alt); padding: 6px 14px; border-radius: 100px;
  font-size: 13px; font-weight: 500; color: var(--text-secondary);
  border: 1px solid var(--border);
}

/* ── Pricing ── */
.pricing { padding: 100px 0; background: var(--bg-alt); }
.pricing-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; max-width: 960px; margin: 0 auto; }
.price-card {
  background: #fff; border-radius: var(--radius-lg); padding: 36px 28px;
  border: 1.5px solid var(--border); text-align: center;
  transition: all .3s; position: relative;
}
.price-card:hover { box-shadow: 0 12px 40px rgba(0,0,0,.08); transform: translateY(-4px); }
.price-card-popular { border-color: var(--blue); box-shadow: 0 8px 32px rgba(59,130,246,.15); transform: scale(1.04); }
.price-card-popular:hover { transform: scale(1.04) translateY(-4px); }
.price-popular-badge {
  position: absolute; top: -12px; left: 50%; transform: translateX(-50%);
  background: var(--blue); color: #fff; padding: 4px 16px;
  border-radius: 100px; font-size: 12px; font-weight: 700;
}
.price-card h4 { font-size: 20px; font-weight: 800; margin-bottom: 8px; }
.price-amount { font-size: 44px; font-weight: 900; color: var(--text); margin-bottom: 24px; letter-spacing: -1px; }
.price-amount span { font-size: 16px; font-weight: 500; color: var(--text-tertiary); }
.price-card ul { list-style: none; text-align: left; margin-bottom: 28px; }
.price-card li {
  padding: 8px 0; font-size: 14px; color: var(--text-secondary);
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; gap: 8px;
}
.price-card li::before { content: ''; width: 6px; height: 6px; border-radius: 50%; background: var(--blue); flex-shrink: 0; }

/* ── CTA ── */
.cta-section { padding: 100px 0; }
.cta-card {
  background: linear-gradient(135deg, var(--blue), var(--blue-dark));
  border-radius: var(--radius-lg); padding: 64px 48px;
  text-align: center; color: #fff;
}
.cta-card h2 { font-size: clamp(24px, 3.5vw, 36px); font-weight: 900; margin-bottom: 16px; }
.cta-card p { font-size: 17px; opacity: .85; max-width: 520px; margin: 0 auto 32px; line-height: 1.6; }
.cta-actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

/* ── Footer ── */
.footer { background: #0F172A; color: #fff; padding: 64px 0 0; }
.footer-inner { display: grid; grid-template-columns: 1.5fr 2fr; gap: 48px; }
.footer-brand p { font-size: 14px; color: #94A3B8; margin-top: 16px; line-height: 1.6; }
.footer-logo { width: 52px; height: 52px; border-radius: 14px; object-fit: contain; }
.footer-links { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.footer-col h5 { font-size: 14px; font-weight: 700; margin-bottom: 16px; color: #fff; }
.footer-col a { display: block; font-size: 14px; color: #94A3B8; text-decoration: none; margin-bottom: 10px; transition: color .2s; }
.footer-col a:hover { color: var(--blue); }
.footer-bottom { border-top: 1px solid #1E293B; margin-top: 48px; padding: 20px 0; }
.footer-bottom p { font-size: 13px; color: #475569; }

/* ══════════════════════════════════════ RESPONSIVE ══════════════════════════════════════ */
@media (max-width: 1024px) {
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .modules-grid { grid-template-columns: repeat(3, 1fr); }
  .ai-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .nav-links { display: none; position: absolute; top: 60px; left: 0; right: 0; background: #fff; flex-direction: column; padding: 20px 24px; box-shadow: 0 8px 32px rgba(0,0,0,.1); border-radius: 0 0 16px 16px; }
  .nav-links-open { display: flex; }
  .nav-actions { display: none; }
  .nav-mobile-toggle { display: block; margin-left: auto; }

  .hero { padding: 120px 0 60px; }
  .hero-title { font-size: 32px; }
  .hero-sub { font-size: 16px; }

  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .features-grid { grid-template-columns: 1fr; }
  .modules-grid { grid-template-columns: repeat(2, 1fr); }
  .ai-grid { grid-template-columns: 1fr; }

  .circle-split, .iot-split { grid-template-columns: 1fr; }
  .circle-visual { min-height: 240px; }

  .pricing-grid { grid-template-columns: 1fr; max-width: 400px; }
  .price-card-popular { transform: none; }
  .price-card-popular:hover { transform: translateY(-4px); }

  .footer-inner { grid-template-columns: 1fr; }
  .footer-links { grid-template-columns: repeat(3, 1fr); }

  .cta-card { padding: 40px 24px; }
}

@media (max-width: 480px) {
  .modules-grid { grid-template-columns: 1fr 1fr; }
  .footer-links { grid-template-columns: 1fr 1fr; }
  .hero-pills { gap: 6px; }
  .hero-pill { font-size: 12px; padding: 4px 10px; }
}