/* ===== CSS VARIABLES ===== */
:root {
  --primary: #0a5eb0;
  --primary-dark: #07438a;
  --primary-light: #1a7de8;
  --accent: #00c9a7;
  --accent-dark: #00a88c;
  --dark: #0d1b2a;
  --dark-2: #1b2e42;
  --gray: #6b7280;
  --gray-light: #f3f6fb;
  --white: #ffffff;
  --text: #2d3748;
  --border: #e2e8f0;
  --shadow: 0 4px 24px rgba(10, 94, 176, 0.12);
  --shadow-lg: 0 12px 48px rgba(10, 94, 176, 0.18);
  --radius: 16px;
  --radius-sm: 10px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== RESET & BASE ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Inter', sans-serif;
  color: var(--text);
  background: var(--white);
  overflow-x: hidden;
  line-height: 1.7;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }

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

.section-tag {
  display: inline-block;
  background: rgba(10, 94, 176, 0.1);
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  padding: 6px 16px;
  border-radius: 50px;
  margin-bottom: 16px;
}
.section-title {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 800;
  color: var(--dark);
  line-height: 1.2;
  margin-bottom: 16px;
}
.section-subtitle {
  font-size: 17px;
  color: var(--gray);
  max-width: 640px;
  line-height: 1.8;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 32px;
  border-radius: 50px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  border: 2px solid transparent;
}
.btn-primary {
  background: var(--primary);
  color: var(--white);
  box-shadow: 0 6px 20px rgba(10, 94, 176, 0.35);
}
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 10px 28px rgba(10, 94, 176, 0.45); }
.btn-outline { background: transparent; color: var(--white); border-color: rgba(255,255,255,0.6); }
.btn-outline:hover { background: rgba(255,255,255,0.15); border-color: var(--white); transform: translateY(-2px); }
.btn-accent { background: var(--accent); color: var(--white); box-shadow: 0 6px 20px rgba(0,201,167,0.35); }
.btn-accent:hover { background: var(--accent-dark); transform: translateY(-2px); }

/* ===== NAVBAR ===== */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 20px 0;
  transition: var(--transition);
}
.navbar.scrolled {
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(20px);
  box-shadow: 0 2px 24px rgba(0,0,0,0.08);
  padding: 14px 0;
}
.navbar .container { display: flex; align-items: center; justify-content: space-between; }
.navbar-brand { display: flex; align-items: center; gap: 12px; }
.navbar-logo { height: 44px; width: auto; display: block; }
.brand-icon {
  width: 44px; height: 44px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  color: white; font-size: 20px; flex-shrink: 0;
}
.brand-text { display: flex; flex-direction: column; }
.brand-name { font-family: 'Plus Jakarta Sans', sans-serif; font-weight: 800; font-size: 20px; color: var(--white); line-height: 1.1; transition: var(--transition); }
.navbar.scrolled .brand-name { color: var(--dark); }
.brand-tagline { font-size: 11px; color: rgba(255,255,255,0.75); font-weight: 500; letter-spacing: 0.5px; transition: var(--transition); }
.navbar.scrolled .brand-tagline { color: var(--gray); }
.nav-links { display: flex; align-items: center; gap: 4px; }
.nav-links a { padding: 8px 14px; font-size: 14px; font-weight: 500; color: rgba(255,255,255,0.9); border-radius: 8px; transition: var(--transition); }
.nav-links a.nav-active { font-weight: 700; color: white; }
.navbar.scrolled .nav-links a.nav-active { color: var(--primary); }
.navbar.scrolled .nav-links a { color: var(--text); }
.nav-links a:hover { background: rgba(255,255,255,0.15); color: white; }
.navbar.scrolled .nav-links a:hover { background: var(--gray-light); color: var(--primary); }
.nav-cta { background: var(--white) !important; color: var(--primary) !important; font-weight: 700 !important; border-radius: 50px !important; padding: 10px 20px !important; box-shadow: 0 4px 14px rgba(0,0,0,0.15); }
.navbar.scrolled .nav-cta { background: var(--primary) !important; color: white !important; }
.nav-cta:hover { transform: translateY(-1px); box-shadow: 0 6px 20px rgba(0,0,0,0.2) !important; }

/* Mobile */
.hamburger { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 8px; border-radius: 8px; transition: var(--transition); background: none; border: none; }
.hamburger span { display: block; width: 24px; height: 2px; background: white; border-radius: 2px; transition: var(--transition); }
.navbar.scrolled .hamburger span { background: var(--dark); }
.hamburger.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.mobile-nav {
  display: none; position: fixed; inset: 0;
  background: rgba(13,27,42,0.97); backdrop-filter: blur(20px);
  z-index: 999; flex-direction: column; align-items: center; justify-content: center;
  gap: 8px; opacity: 0; pointer-events: none; transition: opacity 0.3s;
}
.mobile-nav.open { opacity: 1; pointer-events: all; display: flex; }
.mobile-nav a { font-family: 'Plus Jakarta Sans', sans-serif; font-size: 26px; font-weight: 700; color: white; padding: 10px 20px; border-radius: 12px; transition: var(--transition); }
.mobile-nav a:hover { background: rgba(255,255,255,0.08); }
.mobile-nav-close { position: absolute; top: 24px; right: 24px; width: 44px; height: 44px; background: rgba(255,255,255,0.08); border-radius: 12px; display: flex; align-items: center; justify-content: center; color: white; font-size: 20px; cursor: pointer; border: none; }

/* ===== HERO ===== */
.hero {
  min-height: 100vh;
  background: linear-gradient(135deg, rgba(13,27,42,0.75) 0%, rgba(10,58,107,0.65) 50%, rgba(10,94,176,0.6) 100%), url('../assets/Background.jpg') center/cover no-repeat;
  position: relative; display: flex; align-items: center; overflow: hidden;
}
.hero-bg-pattern { position: absolute; inset: 0; background-image: radial-gradient(circle at 20% 50%, rgba(0,201,167,0.12) 0%, transparent 50%), radial-gradient(circle at 80% 20%, rgba(26,125,232,0.2) 0%, transparent 40%), radial-gradient(circle at 60% 80%, rgba(10,94,176,0.15) 0%, transparent 40%); }
.hero-grid { position: absolute; inset: 0; background-image: linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px); background-size: 60px 60px; }
.floating-shapes { display: none; }


.hero .container { position: relative; z-index: 2; display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; padding-top: 80px; }
.hero-badge { display: inline-flex; align-items: center; gap: 8px; background: rgba(0,201,167,0.15); border: 1px solid rgba(0,201,167,0.3); color: var(--accent); padding: 8px 18px; border-radius: 50px; font-size: 13px; font-weight: 600; margin-bottom: 24px; width: fit-content; }
.hero-title { font-family: 'Plus Jakarta Sans', sans-serif; font-size: clamp(36px, 5vw, 60px); font-weight: 800; color: var(--white); line-height: 1.1; margin-bottom: 24px; }
.hero-title .highlight { background: linear-gradient(135deg, var(--accent), #4fd1c5); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.hero-desc { font-size: 17px; color: rgba(255,255,255,0.75); line-height: 1.8; margin-bottom: 36px; }
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 48px; }
.hero-stats { display: flex; gap: 32px; }
.stat-item { text-align: left; }
.stat-number { font-family: 'Plus Jakarta Sans', sans-serif; font-size: 32px; font-weight: 800; color: var(--white); line-height: 1; }
.stat-label { font-size: 13px; color: rgba(255,255,255,0.6); margin-top: 4px; font-weight: 500; }

.hero-visual { display: flex; justify-content: center; align-items: center; }
.hero-card-stack { position: relative; width: 100%; max-width: 440px; }
.hero-main-card { background: rgba(255,255,255,0.08); backdrop-filter: blur(20px); border: 1px solid rgba(255,255,255,0.15); border-radius: 24px; padding: 32px; position: relative; z-index: 2; }
.hero-card-icon { width: 64px; height: 64px; background: linear-gradient(135deg, var(--accent), #4fd1c5); border-radius: 18px; display: flex; align-items: center; justify-content: center; font-size: 28px; color: white; margin-bottom: 20px; }
.hero-card-title { font-family: 'Plus Jakarta Sans', sans-serif; font-size: 22px; font-weight: 700; color: white; margin-bottom: 8px; }
.hero-card-desc { font-size: 14px; color: rgba(255,255,255,0.65); line-height: 1.6; margin-bottom: 24px; }
.hero-card-specs { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.spec-chip { background: rgba(255,255,255,0.08); border: 1px solid rgba(255,255,255,0.12); border-radius: 10px; padding: 10px 14px; font-size: 13px; color: rgba(255,255,255,0.85); }
.spec-chip strong { display: block; color: var(--accent); font-size: 15px; font-weight: 700; }

.floating-badge { position: absolute; background: white; border-radius: 16px; padding: 14px 18px; box-shadow: var(--shadow-lg); display: flex; align-items: center; gap: 12px; z-index: 3; }
.floating-badge-1 { top: -20px; right: -20px; animation: float 4s ease-in-out infinite; }
.floating-badge-2 { bottom: -20px; left: -20px; animation: float 5s ease-in-out infinite reverse; }
.floating-badge .fb-icon { width: 36px; height: 36px; border-radius: 10px; display: flex; align-items: center; justify-content: center; font-size: 16px; flex-shrink: 0; }
.fb-icon-blue { background: rgba(10,94,176,0.1); color: var(--primary); }
.fb-icon-green { background: rgba(0,201,167,0.1); color: var(--accent); }
.fb-text { font-size: 13px; }
.fb-text strong { display: block; font-size: 15px; color: var(--dark); font-weight: 700; }
.fb-text span { color: var(--gray); }

/* ===== WHAT IS ===== */
.what-is { padding: 100px 0; background: var(--white); }
.what-is .container { display: flex; flex-direction: column; align-items: center; gap: 48px; }
.what-is-header { text-align: center; max-width: 760px; }
.what-is-lead { font-size: 16px; color: var(--gray); line-height: 1.8; margin-bottom: 16px; }
.what-is-lead strong { color: var(--primary); }
.what-is-lead em { color: var(--dark); font-style: italic; }
.what-is-points { display: flex; flex-direction: column; gap: 12px; width: 100%; max-width: 760px; }
.what-is-points--grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.wi-point { display: flex; align-items: flex-start; gap: 12px; font-size: 15px; color: var(--text); background: var(--light); border-radius: 10px; padding: 16px 20px; }
.wi-point i { color: var(--accent); font-size: 16px; margin-top: 3px; flex-shrink: 0; }
.wi-point span { line-height: 1.6; }

/* Diagram */
.diagram-card { background: var(--dark); border-radius: 24px; overflow: hidden; }
.diagram-title { padding: 20px 24px 16px; font-family: 'Plus Jakarta Sans', sans-serif; font-size: 15px; font-weight: 700; color: white; display: flex; align-items: center; gap: 10px; border-bottom: 1px solid rgba(255,255,255,0.08); }
.diagram-title i { color: var(--accent); }
.diagram-body { padding: 24px; }
.diagram-svg-wrap { border-radius: 12px; overflow: hidden; margin-bottom: 16px; }
.ts-diagram { width: 100%; height: auto; display: block; }
.diagram-legend { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.legend-item { display: flex; align-items: center; gap: 8px; font-size: 12px; color: rgba(255,255,255,0.7); }
.legend-dot { width: 10px; height: 10px; border-radius: 50%; flex-shrink: 0; }

/* ===== HOW IT WORKS ===== */
.how-it-works { padding: 100px 0; background: var(--gray-light); }
.how-header { text-align: center; margin-bottom: 16px; }
.how-subtitle { text-align: center; font-size: 16px; color: var(--gray); max-width: 640px; margin: 0 auto 60px; line-height: 1.7; }
.steps-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; margin-bottom: 60px; }
.step-card { background: var(--white); border-radius: 20px; padding: 28px 24px; border: 1px solid var(--border); transition: var(--transition); position: relative; }
.step-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-6px); border-color: var(--primary); }
.step-num { font-family: 'Plus Jakarta Sans', sans-serif; font-size: 52px; font-weight: 800; color: rgba(10,94,176,0.07); line-height: 1; margin-bottom: -8px; }
.step-icon { width: 52px; height: 52px; border-radius: 14px; background: linear-gradient(135deg, var(--primary), var(--primary-light)); display: flex; align-items: center; justify-content: center; font-size: 22px; color: white; margin-bottom: 18px; }
.step-card:nth-child(2) .step-icon { background: linear-gradient(135deg, #0a7553, var(--accent)); }
.step-card:nth-child(3) .step-icon { background: linear-gradient(135deg, #c0392b, #e74c3c); }
.step-card:nth-child(4) .step-icon { background: linear-gradient(135deg, var(--accent-dark), var(--accent)); }
.step-title { font-family: 'Plus Jakarta Sans', sans-serif; font-size: 17px; font-weight: 700; color: var(--dark); margin-bottom: 10px; }
.step-desc { font-size: 14px; color: var(--gray); line-height: 1.7; }

/* Comparison Table */
.comparison-block { background: var(--white); border-radius: 24px; overflow: hidden; box-shadow: var(--shadow); }
.comparison-title { padding: 20px 28px; font-family: 'Plus Jakarta Sans', sans-serif; font-size: 16px; font-weight: 700; color: var(--dark); border-bottom: 1px solid var(--border); display: flex; align-items: center; gap: 10px; }
.comparison-title i { color: var(--primary); }
.comparison-table { width: 100%; }
.ct-header { display: grid; grid-template-columns: 1.5fr 1fr 1fr; background: var(--gray-light); }
.ct-header .ct-col { padding: 14px 20px; font-size: 13px; font-weight: 700; text-align: center; text-transform: uppercase; letter-spacing: 0.5px; }
.ct-col--conv { color: var(--gray); }
.ct-col--ts { color: var(--accent); background: rgba(0,201,167,0.08); }
.ct-row { display: grid; grid-template-columns: 1.5fr 1fr 1fr; border-top: 1px solid var(--border); }
.ct-row:hover { background: rgba(10,94,176,0.02); }
.ct-label { padding: 14px 20px 14px 28px; font-size: 14px; color: var(--text); font-weight: 500; }
.ct-col { padding: 14px 20px; text-align: center; font-size: 14px; display: flex; align-items: center; justify-content: center; gap: 6px; }
.ct-col--conv { color: var(--gray); }
.ct-col--conv i { color: #ef4444; }
.ct-col--ts { color: var(--dark); font-weight: 600; background: rgba(0,201,167,0.04); }
.ct-col--ts i { color: var(--accent); }

/* ===== SPECS SECTION ===== */
.specs-section { padding: 100px 0; background: var(--white); }
.specs-header { text-align: center; margin-bottom: 60px; }
.spec-cards { display: grid; grid-template-columns: repeat(6, 1fr); gap: 16px; margin-bottom: 60px; }
.spec-card { background: var(--gray-light); border-radius: 18px; padding: 24px 18px; text-align: center; border: 2px solid transparent; transition: var(--transition); }
.spec-card:hover { border-color: var(--primary); background: rgba(10,94,176,0.04); transform: translateY(-4px); box-shadow: var(--shadow); }
.sc-icon { font-size: 28px; color: var(--primary); margin-bottom: 12px; }
.sc-label { font-size: 12px; color: var(--gray); font-weight: 600; text-transform: uppercase; letter-spacing: 0.5px; margin-bottom: 8px; }
.sc-value { font-family: 'Plus Jakarta Sans', sans-serif; font-size: 18px; font-weight: 800; color: var(--dark); margin-bottom: 4px; }
.sc-note { font-size: 12px; color: var(--gray); }

/* Variants */
.variants-block { background: var(--gray-light); border-radius: 24px; padding: 36px; margin-bottom: 40px; }
.variants-title { font-family: 'Plus Jakarta Sans', sans-serif; font-size: 18px; font-weight: 700; color: var(--dark); margin-bottom: 24px; }
.variants-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; }
.variants-grid--single { grid-template-columns: 280px; justify-content: center; }
.variant-item { background: var(--white); border-radius: 16px; padding: 22px 18px; border: 2px solid var(--border); text-align: center; transition: var(--transition); position: relative; }
.variant-item:hover { border-color: var(--primary); transform: translateY(-4px); box-shadow: var(--shadow); }
.variant-item--popular { border-color: var(--accent); background: rgba(0,201,167,0.03); }
.vi-popular-tag { position: absolute; top: -12px; left: 50%; transform: translateX(-50%); background: var(--accent); color: white; font-size: 11px; font-weight: 700; padding: 4px 12px; border-radius: 50px; white-space: nowrap; }
.vi-size { font-family: 'Plus Jakarta Sans', sans-serif; font-size: 28px; font-weight: 800; color: var(--primary); line-height: 1; margin-bottom: 4px; }
.variant-item--popular .vi-size { color: var(--accent-dark); }
.vi-label { font-size: 13px; color: var(--gray); font-weight: 600; margin-bottom: 12px; }
.vi-desc { font-size: 13px; color: var(--gray); line-height: 1.5; margin-bottom: 12px; }
.vi-tag { display: inline-block; font-size: 11px; font-weight: 600; color: var(--primary); background: rgba(10,94,176,0.08); padding: 4px 10px; border-radius: 50px; }
.variant-item--popular .vi-tag { color: var(--accent-dark); background: rgba(0,201,167,0.12); }

/* Angle Guide */
.angle-block { background: var(--dark); border-radius: 24px; padding: 36px; }
.angle-title { font-family: 'Plus Jakarta Sans', sans-serif; font-size: 18px; font-weight: 700; color: white; margin-bottom: 24px; display: flex; align-items: center; gap: 10px; }
.angle-title i { color: var(--accent); }
.angle-grid { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 20px; }
.angle-item { background: rgba(255,255,255,0.05); border: 1px solid rgba(255,255,255,0.08); border-radius: 16px; padding: 24px; position: relative; transition: var(--transition); }
.angle-item:hover { background: rgba(255,255,255,0.09); }
.angle-item--optimal { border-color: rgba(0,201,167,0.5); background: rgba(0,201,167,0.07); }
.ai-badge { position: absolute; top: -12px; left: 20px; background: var(--accent); color: white; font-size: 11px; font-weight: 700; padding: 4px 12px; border-radius: 50px; }
.ai-angle { font-family: 'Plus Jakarta Sans', sans-serif; font-size: 36px; font-weight: 800; color: white; line-height: 1; margin-bottom: 6px; }
.angle-item--optimal .ai-angle { color: var(--accent); }
.ai-label { font-size: 14px; font-weight: 700; color: rgba(255,255,255,0.9); margin-bottom: 10px; }
.ai-desc { font-size: 13px; color: rgba(255,255,255,0.55); line-height: 1.6; }

/* ===== PANDUAN TUBE SETTLER ===== */
.panduan-section { padding: 100px 0; background: var(--dark-2); position: relative; overflow: hidden; }
.panduan-section::before { content: ''; position: absolute; top: -100px; left: -100px; width: 400px; height: 400px; border-radius: 50%; background: radial-gradient(circle, rgba(0,201,167,0.08), transparent 70%); }
.panduan-section::after { content: ''; position: absolute; bottom: -100px; right: -100px; width: 500px; height: 500px; border-radius: 50%; background: radial-gradient(circle, rgba(10,94,176,0.12), transparent 70%); }
.panduan-section .container { position: relative; z-index: 1; }
.panduan-header { text-align: center; margin-bottom: 60px; }
.panduan-group-label { display: inline-flex; align-items: center; gap: 10px; font-family: 'Plus Jakarta Sans', sans-serif; font-size: 16px; font-weight: 700; padding: 10px 22px; border-radius: 50px; margin-bottom: 28px; }
.panduan-group-label--pvc { background: rgba(10,94,176,0.2); color: #7eb8f7; border: 1px solid rgba(10,94,176,0.4); }
.panduan-group-label--pc  { background: rgba(0,201,167,0.15); color: var(--accent); border: 1px solid rgba(0,201,167,0.35); }
.panduan-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.panduan-card { background: rgba(255,255,255,0.04); border: 1px solid rgba(255,255,255,0.08); border-radius: 20px; overflow: hidden; transition: var(--transition); display: flex; flex-direction: column; position: relative; }
.panduan-card:hover { border-color: rgba(255,255,255,0.22); transform: translateY(-4px); box-shadow: 0 16px 40px rgba(0,0,0,0.35); }
.panduan-img-wrap { width: 100%; aspect-ratio: 16/9; overflow: hidden; background: rgba(255,255,255,0.05); display: flex; align-items: center; justify-content: center; }
.panduan-img { width: 100%; height: 100%; object-fit: cover; display: block; }
.panduan-img[src=""] { display: none; }
.panduan-img-wrap:has(.panduan-img[src=""])::after { content: '\f03e'; font-family: 'Font Awesome 6 Free'; font-weight: 900; font-size: 36px; color: rgba(255,255,255,0.12); }
.panduan-card-body { padding: 20px 22px 24px; flex: 1; }
.panduan-card-title { font-family: 'Plus Jakarta Sans', sans-serif; font-size: 15px; font-weight: 700; color: white; margin-bottom: 16px; padding-bottom: 12px; border-bottom: 1px solid rgba(255,255,255,0.08); display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.tkdn-badge { display: inline-flex; align-items: center; background: linear-gradient(135deg, #c8102e, #e63950); color: white; font-size: 10px; font-weight: 800; letter-spacing: 1px; padding: 3px 8px; border-radius: 6px; flex-shrink: 0; margin-left: auto; }
.panduan-specs { list-style: none; display: flex; flex-direction: column; gap: 9px; }
.panduan-specs li { display: flex; justify-content: space-between; align-items: flex-start; gap: 8px; font-size: 13px; }
.ps-label { color: rgba(255,255,255,0.45); flex-shrink: 0; }
.ps-val { color: rgba(255,255,255,0.9); font-weight: 600; text-align: right; }

/* ===== APPLICATIONS ===== */
.applications { padding: 100px 0; background: var(--gray-light); }
.app-header { text-align: center; margin-bottom: 60px; }
.app-grid-full { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.app-card { background: var(--white); border-radius: 18px; padding: 28px; display: flex; align-items: flex-start; gap: 18px; border: 1px solid var(--border); transition: var(--transition); }
.app-card:hover { box-shadow: var(--shadow); border-color: var(--primary); transform: translateY(-4px); }
.ac-icon { width: 52px; height: 52px; border-radius: 14px; background: linear-gradient(135deg, var(--primary), var(--primary-light)); display: flex; align-items: center; justify-content: center; font-size: 22px; color: white; flex-shrink: 0; }
.app-card:nth-child(2) .ac-icon { background: linear-gradient(135deg, #0a7553, var(--accent)); }
.app-card:nth-child(3) .ac-icon { background: linear-gradient(135deg, var(--dark-2), var(--primary)); }
.app-card:nth-child(4) .ac-icon { background: linear-gradient(135deg, #5a2d82, #9b59b6); }
.app-card:nth-child(5) .ac-icon { background: linear-gradient(135deg, #c0392b, #e74c3c); }
.app-card:nth-child(6) .ac-icon { background: linear-gradient(135deg, var(--accent-dark), #4fd1c5); }
.ac-content h4 { font-family: 'Plus Jakarta Sans', sans-serif; font-size: 16px; font-weight: 700; color: var(--dark); margin-bottom: 8px; }
.ac-content p { font-size: 14px; color: var(--gray); line-height: 1.6; }

/* ===== FAQ ===== */
.faq-section { padding: 100px 0; background: var(--white); }
.faq-header { text-align: center; margin-bottom: 56px; }
.faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
.faq-item { border: 1px solid var(--border); border-radius: 16px; overflow: hidden; transition: var(--transition); }
.faq-item.open { border-color: var(--primary); box-shadow: var(--shadow); }
.faq-question { width: 100%; padding: 20px 24px; background: none; border: none; text-align: left; font-family: inherit; font-size: 16px; font-weight: 600; color: var(--dark); cursor: pointer; display: flex; align-items: center; justify-content: space-between; gap: 16px; transition: var(--transition); }
.faq-question:hover { background: var(--gray-light); }
.faq-item.open .faq-question { background: rgba(10,94,176,0.04); color: var(--primary); }
.faq-icon { font-size: 14px; color: var(--gray); transition: transform 0.3s; flex-shrink: 0; }
.faq-item.open .faq-icon { transform: rotate(180deg); color: var(--primary); }
.faq-answer { display: none; padding: 0 24px 20px; }
.faq-item.open .faq-answer { display: block; }
.faq-answer p { font-size: 15px; color: var(--gray); line-height: 1.8; margin-bottom: 10px; }
.faq-answer p:last-child { margin-bottom: 0; }
.faq-answer ul { margin: 10px 0 10px 20px; display: flex; flex-direction: column; gap: 6px; }
.faq-answer ul li { font-size: 15px; color: var(--gray); line-height: 1.6; }
.faq-answer strong { color: var(--dark); }

/* ===== CTA BANNER ===== */
.cta-banner { padding: 80px 0; background: linear-gradient(135deg, var(--primary-dark), var(--primary)); position: relative; overflow: hidden; }
.cta-banner::before { content: ''; position: absolute; top: -50%; right: -10%; width: 400px; height: 400px; border-radius: 50%; background: rgba(255,255,255,0.05); }
.cta-banner::after { content: ''; position: absolute; bottom: -50%; left: -5%; width: 300px; height: 300px; border-radius: 50%; background: rgba(0,201,167,0.1); }
.cta-content { position: relative; z-index: 1; text-align: center; }
.cta-icon { display: flex; align-items: center; justify-content: center; margin: 0 auto 24px; }
.cta-logo { height: 60px; width: auto; }
.cta-title { font-family: 'Plus Jakarta Sans', sans-serif; font-size: clamp(24px, 3vw, 36px); font-weight: 800; color: white; margin-bottom: 16px; max-width: 640px; margin-left: auto; margin-right: auto; }
.cta-desc { font-size: 17px; color: rgba(255,255,255,0.8); margin-bottom: 36px; max-width: 540px; margin-left: auto; margin-right: auto; line-height: 1.7; }
.cta-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ===== CONTACT ===== */
.contact { padding: 100px 0; background: var(--white); }
.contact-header { text-align: center; margin-bottom: 56px; }
.contact-simple { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-bottom: 40px; }
.cs-item { text-align: center; padding: 32px 24px; background: var(--light); border-radius: 16px; border: 1px solid var(--border); }
.cs-icon { width: 52px; height: 52px; border-radius: 14px; background: linear-gradient(135deg, var(--primary), var(--primary-light)); display: flex; align-items: center; justify-content: center; font-size: 20px; color: white; margin: 0 auto 16px; }
.cs-label { font-size: 12px; font-weight: 600; color: var(--gray); text-transform: uppercase; letter-spacing: 1px; margin-bottom: 8px; }
.cs-value { font-size: 15px; font-weight: 700; color: var(--dark); margin-bottom: 4px; }
.cs-sub { font-size: 13px; color: var(--gray); }
.contact-actions { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; }
.contact-form-simple { background: var(--light); border-radius: 20px; padding: 36px; border: 1px solid var(--border); max-width: 700px; margin: 0 auto; }
.cfs-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { margin-bottom: 18px; }
.form-group label { display: block; font-size: 14px; font-weight: 600; color: var(--dark); margin-bottom: 8px; }
.form-group input,
.form-group textarea { width: 100%; padding: 13px 18px; background: white; border: 2px solid var(--border); border-radius: 12px; font-size: 15px; font-family: inherit; color: var(--text); transition: var(--transition); outline: none; box-sizing: border-box; }
.form-group input:focus,
.form-group textarea:focus { border-color: var(--primary); box-shadow: 0 0 0 4px rgba(10,94,176,0.08); }
.form-group textarea { resize: vertical; min-height: 110px; }
.cfs-actions { display: flex; gap: 12px; flex-wrap: wrap; }

/* OTP Step */
.otp-info { text-align: center; padding: 20px 0 24px; }
.otp-icon { font-size: 40px; color: var(--primary); margin-bottom: 12px; display: block; }
.otp-info p { margin: 6px 0; color: var(--text); font-size: 15px; line-height: 1.6; }
.otp-info strong { color: var(--dark); }
.otp-hint { font-size: 13px !important; color: var(--gray) !important; }
#otpInput { font-size: 22px; letter-spacing: 8px; text-align: center; font-weight: 700; }

/* Notifikasi hasil kirim form */
.form-notification {
  padding: 14px 20px;
  border-radius: 12px;
  font-size: 15px;
  font-weight: 500;
  margin-bottom: 20px;
  line-height: 1.5;
}
.notif-success {
  background: #d1fae5;
  color: #065f46;
  border: 1px solid #6ee7b7;
}
.notif-error {
  background: #fee2e2;
  color: #991b1b;
  border: 1px solid #fca5a5;
}

/* ===== FOOTER ===== */
footer { background: var(--dark); color: rgba(255,255,255,0.7); padding: 60px 0 0; }
.footer-grid { display: grid; grid-template-columns: 1.8fr 1fr 1fr; gap: 48px; padding-bottom: 48px; border-bottom: 1px solid rgba(255,255,255,0.08); }
.footer-logos { display: flex; align-items: center; gap: 16px; margin-bottom: 14px; }
.footer-logo { height: 50px; width: auto; display: block; }
.footer-logo--mufen { height: 30px; }
.footer-company-name { display: block; color: white; font-size: 15px; font-weight: 700; letter-spacing: 0.5px; margin-bottom: 4px; }
.footer-tagline { display: block; color: rgba(255,255,255,0.45); font-size: 13px; margin-bottom: 16px; }
.footer-wa-btn { margin-top: 16px; font-size: 13px; padding: 10px 18px; }
.footer-desc { font-size: 14px; line-height: 1.8; margin-bottom: 24px; color: rgba(255,255,255,0.55); }
.social-links { display: flex; gap: 12px; }
.social-link { width: 40px; height: 40px; border-radius: 12px; background: rgba(255,255,255,0.07); border: 1px solid rgba(255,255,255,0.1); display: flex; align-items: center; justify-content: center; color: rgba(255,255,255,0.6); font-size: 16px; transition: var(--transition); position: relative; }
.social-link:hover { color: white; transform: translateY(-3px); box-shadow: 0 6px 20px rgba(0,0,0,0.3); }
.social-link--wa    { color: #25d366; }
.social-link--ig    { color: #e6683c; }
.social-link--yt    { color: #ff0000; }
.social-link--tiktok { color: #69c9d0; }
.social-link--linkedin { color: #0a66c2; }
.social-link--email  { color: var(--accent); }
.social-link--wa:hover    { background: #25d366; border-color: #25d366; }
.social-link--ig:hover    { background: linear-gradient(45deg, #f09433, #e6683c, #dc2743, #cc2366, #bc1888); border-color: #e6683c; }
.social-link--fb:hover    { background: #1877f2; border-color: #1877f2; }
.social-link--yt:hover    { background: #ff0000; border-color: #ff0000; }
.social-link--tiktok:hover { background: #010101; border-color: #69c9d0; }
.social-link--linkedin:hover { background: #0a66c2; border-color: #0a66c2; }
.social-link--x:hover     { background: #000000; border-color: #000000; }
.social-link--email:hover  { background: var(--accent); border-color: var(--accent); }
.footer-col h4 { font-family: 'Plus Jakarta Sans', sans-serif; font-size: 15px; font-weight: 700; color: white; margin-bottom: 20px; }
.footer-links { display: flex; flex-direction: column; gap: 12px; }
.footer-link { font-size: 14px; color: rgba(255,255,255,0.55); transition: var(--transition); display: flex; align-items: center; gap: 8px; }
.footer-link::before { content: ''; width: 4px; height: 4px; border-radius: 50%; background: var(--accent); flex-shrink: 0; }
.footer-link:hover { color: white; padding-left: 4px; }
.footer-contact-items { display: flex; flex-direction: column; gap: 14px; }
.footer-contact-item { display: flex; align-items: flex-start; gap: 10px; font-size: 14px; color: rgba(255,255,255,0.55); }
.footer-contact-item i { color: var(--accent); font-size: 15px; margin-top: 2px; flex-shrink: 0; }
.footer-bottom { padding: 24px 0; display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 16px; }
.footer-bottom p { font-size: 13px; color: rgba(255,255,255,0.4); }
.footer-bottom-links { display: flex; gap: 24px; }
.footer-bottom-links a { font-size: 13px; color: rgba(255,255,255,0.4); transition: var(--transition); }
.footer-bottom-links a:hover { color: white; }

/* ===== WHATSAPP & BACK TO TOP ===== */
.wa-btn { position: fixed; bottom: 30px; right: 30px; width: 60px; height: 60px; background: #25d366; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 28px; color: white; box-shadow: 0 6px 24px rgba(37,211,102,0.5); z-index: 999; transition: var(--transition); animation: wa-pulse 2s ease-in-out infinite; }
.wa-btn:hover { transform: scale(1.1); }
@keyframes wa-pulse { 0%, 100% { box-shadow: 0 6px 24px rgba(37,211,102,0.5); } 50% { box-shadow: 0 6px 32px rgba(37,211,102,0.8), 0 0 0 12px rgba(37,211,102,0.12); } }
.wa-tooltip { position: absolute; right: 72px; background: var(--dark); color: white; padding: 8px 16px; border-radius: 8px; font-size: 13px; font-weight: 600; white-space: nowrap; opacity: 0; pointer-events: none; transition: var(--transition); }
.wa-tooltip::after { content: ''; position: absolute; right: -6px; top: 50%; transform: translateY(-50%); border: 6px solid transparent; border-right: none; border-left-color: var(--dark); }
.wa-btn:hover .wa-tooltip { opacity: 1; }
.back-to-top { position: fixed; bottom: 30px; right: 100px; width: 44px; height: 44px; background: var(--primary); border-radius: 50%; display: flex; align-items: center; justify-content: center; color: white; font-size: 18px; box-shadow: var(--shadow); z-index: 998; transition: var(--transition); opacity: 0; pointer-events: none; }
.back-to-top.visible { opacity: 1; pointer-events: all; }
.back-to-top:hover { transform: translateY(-3px); background: var(--primary-dark); }

/* ===== RESPONSIVE ===== */
@media (max-width: 1100px) {
  .spec-cards { grid-template-columns: repeat(3, 1fr); }
  .variants-grid { grid-template-columns: repeat(3, 1fr); }
  .steps-grid { grid-template-columns: repeat(2, 1fr); }
  .app-grid-full { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 1024px) {
  .hero .container { grid-template-columns: 1fr; text-align: center; }
  .hero-visual { display: none; }
  .hero-stats { justify-content: center; }
  .hero-actions { justify-content: center; }
  .what-is-points--grid { grid-template-columns: 1fr; }
  .panduan-grid { grid-template-columns: 1fr 1fr; }
  .angle-grid { grid-template-columns: 1fr 1fr 1fr; }
}

/* ===== TABLET / MOBILE (≤ 768px) ===== */
@media (max-width: 768px) {
  /* Navbar */
  .nav-links { display: none; }
  .hamburger { display: flex; }

  /* Section padding — lebih compact */
  .what-is,
  .how-it-works,
  .specs-section,
  .panduan-section,
  .applications,
  .faq-section,
  .contact { padding: 52px 0; }
  .cta-banner { padding: 44px 0; }

  /* Sembunyikan teks panjang non-esensial */
  .hero-desc { display: none; }
  .how-subtitle { display: none; }
  .step-desc { display: none; }
  .ac-content p { display: none; }
  .footer-desc { display: none; }
  .what-is-lead:nth-child(3) { display: none; }
  .contact-header .section-subtitle { display: none; }
  .app-header .section-subtitle { display: none; }
  .specs-header .section-subtitle { display: none; }
  .panduan-section .section-subtitle { display: none; }
  .cta-desc { display: none; }

  /* Section headers — kurangi margin bawah */
  .specs-header,
  .panduan-header,
  .app-header,
  .faq-header,
  .contact-header,
  .how-header { margin-bottom: 28px; }
  .how-subtitle { margin-bottom: 0; }

  /* Hero */
  .hero .container { padding-top: 96px; padding-bottom: 36px; gap: 28px; }
  .hero-title { font-size: clamp(28px, 8vw, 40px); margin-bottom: 20px; }
  .hero-badge { margin-bottom: 16px; font-size: 12px; }
  .hero-actions { gap: 10px; margin-bottom: 28px; }
  .hero-actions .btn { width: 100%; justify-content: center; }
  .hero-stats { flex-wrap: wrap; gap: 20px; justify-content: center; }
  .stat-number { font-size: 26px; }
  .stat-label { font-size: 12px; }

  /* What-is — kurangi jarak */
  .what-is .container { gap: 24px; }
  .what-is-header { margin-bottom: 0; }
  .what-is-lead { font-size: 14px; margin-bottom: 10px; }

  /* Steps — layout compact tanpa deskripsi */
  .steps-grid { grid-template-columns: 1fr 1fr; gap: 12px; margin-bottom: 32px; }
  .step-card { padding: 20px 16px; }
  .step-num { font-size: 36px; margin-bottom: -4px; }
  .step-icon { width: 44px; height: 44px; font-size: 18px; margin-bottom: 12px; }
  .step-title { font-size: 14px; margin-bottom: 0; }

  /* Comparison table */
  .comparison-block { overflow-x: auto; -webkit-overflow-scrolling: touch; }
  .comparison-table { min-width: 460px; }
  .ct-label { padding: 11px 12px 11px 14px; font-size: 12px; }
  .ct-col { padding: 11px 8px; font-size: 12px; }

  /* Spec cards */
  .spec-cards { grid-template-columns: repeat(3, 1fr); gap: 10px; margin-bottom: 32px; }
  .spec-card { padding: 18px 12px; }
  .sc-icon { font-size: 22px; margin-bottom: 8px; }
  .sc-label { font-size: 10px; margin-bottom: 4px; }
  .sc-value { font-size: 14px; margin-bottom: 2px; }
  .sc-note { font-size: 10px; }

  /* Variants */
  .variants-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .variants-block { padding: 22px 16px; margin-bottom: 24px; }
  .variants-title { font-size: 15px; margin-bottom: 16px; }

  /* Angle guide */
  .angle-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
  .angle-block { padding: 22px 16px; }
  .angle-title { font-size: 15px; margin-bottom: 16px; }
  .ai-desc { display: none; }
  .ai-angle { font-size: 28px; }

  /* Panduan */
  .panduan-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
  .panduan-header { margin-bottom: 28px; }
  .panduan-group-label { font-size: 13px; padding: 8px 16px; margin-bottom: 16px; }
  .panduan-img-wrap { aspect-ratio: 4/3; }
  .panduan-card-body { padding: 14px 16px 18px; }
  .panduan-card-title { font-size: 13px; margin-bottom: 10px; padding-bottom: 8px; }
  .panduan-specs li { font-size: 12px; }

  /* Applications — 2 kolom, tanpa paragraf */
  .app-grid-full { grid-template-columns: 1fr 1fr; gap: 10px; }
  .app-card { padding: 18px 14px; gap: 12px; flex-direction: column; align-items: flex-start; }
  .ac-icon { width: 44px; height: 44px; font-size: 18px; border-radius: 12px; }
  .ac-content h4 { font-size: 13px; line-height: 1.4; }

  /* Contact */
  .contact-simple { grid-template-columns: 1fr; gap: 10px; margin-bottom: 24px; }
  .cs-item { padding: 18px 20px; display: flex; align-items: center; gap: 14px; text-align: left; border-radius: 12px; }
  .cs-icon { margin: 0; flex-shrink: 0; width: 44px; height: 44px; font-size: 18px; }
  .cs-label { font-size: 11px; margin-bottom: 4px; }
  .cs-value { font-size: 14px; }
  .cs-sub { font-size: 12px; }
  .contact-form-simple { padding: 22px 16px; border-radius: 16px; }
  .cfs-row { grid-template-columns: 1fr; gap: 0; }
  .cfs-actions { flex-direction: column; gap: 10px; }
  .cfs-actions .btn { width: 100%; justify-content: center; }

  /* CTA */
  .cta-actions { flex-direction: column; align-items: center; gap: 10px; }
  .cta-actions .btn { width: 100%; max-width: 300px; justify-content: center; }
  .cta-title { font-size: clamp(20px, 5vw, 28px); }

  /* FAQ */
  .faq-list { gap: 8px; }
  .faq-question { font-size: 14px; padding: 16px 18px; }
  .faq-answer { padding: 0 18px 16px; }
  .faq-answer p { font-size: 14px; }

  /* Footer */
  .footer-grid { grid-template-columns: 1fr; gap: 28px; padding-bottom: 28px; }
  footer { padding: 40px 0 0; }
  .footer-logos { margin-bottom: 10px; }
  .footer-bottom { flex-direction: column; text-align: center; gap: 10px; }
  .footer-bottom-links { justify-content: center; gap: 16px; }
  .footer-col h4 { margin-bottom: 14px; }
  .footer-links { gap: 10px; }

  /* WA + back-to-top */
  .wa-btn { bottom: 20px; right: 20px; width: 50px; height: 50px; font-size: 22px; }
  .back-to-top { bottom: 20px; right: 78px; width: 40px; height: 40px; font-size: 15px; }

  /* Mobile nav */
  .mobile-nav a { font-size: 22px; }
}

/* ===== SMALL MOBILE (≤ 480px) ===== */
@media (max-width: 480px) {
  .container { padding: 0 14px; }

  /* Hero */
  .hero .container { padding-top: 86px; }
  .hero-title { font-size: clamp(26px, 9vw, 34px); }
  .hero-badge { font-size: 11px; padding: 5px 12px; margin-bottom: 12px; }
  .hero-stats { gap: 14px; }
  .stat-number { font-size: 22px; }

  /* What-is: sembunyikan semua lead, sisakan wi-points saja */
  .what-is-lead { display: none; }

  /* Steps: 1 kolom di 480px */
  .steps-grid { grid-template-columns: 1fr; gap: 10px; }
  .step-card { padding: 16px 14px; display: flex; align-items: center; gap: 14px; }
  .step-num { display: none; }
  .step-icon { margin-bottom: 0; flex-shrink: 0; }
  .step-title { margin-bottom: 0; font-size: 14px; }

  /* Spec cards: 2 kolom */
  .spec-cards { grid-template-columns: repeat(2, 1fr); gap: 8px; }

  /* Panduan: 1 kolom */
  .panduan-grid { grid-template-columns: 1fr; }

  /* Apps: 1 kolom */
  .app-grid-full { grid-template-columns: 1fr; gap: 8px; }
  .app-card { flex-direction: row; align-items: center; padding: 14px 16px; gap: 14px; }
  .ac-content h4 { font-size: 14px; }

  /* Angle guide: 1 kolom */
  .angle-grid { grid-template-columns: 1fr; gap: 10px; }

  /* Variants: 1 kolom */
  .variants-grid { grid-template-columns: 1fr; gap: 10px; }

  /* Diagram */
  .diagram-legend { grid-template-columns: 1fr; }

  /* Contact info card: kolom */
  .cs-item { flex-direction: column; text-align: center; padding: 16px; }
  .cs-icon { margin: 0 auto; }

  /* CTA */
  .cta-title { font-size: clamp(18px, 6vw, 24px); }
  .cta-logo { height: 44px; }

  /* FAQ */
  .faq-question { font-size: 13px; padding: 14px 16px; }
  .faq-answer { padding: 0 16px 14px; }

  /* Footer */
  .social-links { flex-wrap: wrap; gap: 8px; }
  .footer-company-name { font-size: 13px; }
  .footer-bottom p,
  .footer-bottom-links a { font-size: 12px; }

  /* WA btn */
  .wa-btn { bottom: 16px; right: 16px; width: 46px; height: 46px; font-size: 20px; }
  .back-to-top { bottom: 16px; right: 70px; width: 36px; height: 36px; font-size: 14px; }

  /* Buttons */
  .btn { font-size: 14px; padding: 12px 22px; }

  /* Section tag */
  .section-tag { font-size: 11px; padding: 5px 14px; }
}