:root{
  --butter-yellow: #FFF4A3;
  --charcoal-black: #222222;
  --soft-gray: #F9F9F8;
  --glass-bg: rgba(255,255,255,0.5);
}

section {
  padding: 120px 20px;
  background-color: transparent;
}

.main_custom{
  background-color: #ffffff;
  padding: 120px 20px;
  text-align: center;
}

.main_custom-inner{
  max-width: 960px;
  margin: 0 auto;
}

.main_custom-title{
  font-size: 64px;
  font-weight: 700;
  line-height: 1.2;
  color: #000;
  margin-bottom: 24px;
  letter-spacing: -0.05em;
}

.main_custom-subtitle{
  font-size: 20px;
  line-height: 1.6;
  color: #666;
  margin-bottom:48px;
}

.main_custom-platforms {
  display: flex;
  justify-content: center;
  gap: 28px;
  opacity: 0.6;
}

.main_custom-platforms svg {
  height: 28px;
  filter: grayscale(100%);
}

.steps{
  background-color: #fff;
}

.steps-inner{
  max-width: 1200px;
  margin: 0 auto;
}

.steps-title{
  font-size: 40px;
  font-weight: 700;
  color: #111;
  margin-bottom: 80px;
  letter-spacing: -0.02em;
}

.steps-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 48px;
  justify-content:center;
}

.step{
  background: none;
}

.step-number{
  font-size: 18px;
  font-weight: 800;
  color: #000;
  display: inline-block;
  background : var(--butter-yellow);
  padding: 2px 12px;
  border-radius: 4px;
  margin-bottom: 16px;
}

.step-title{
  font-size: 20px;
  font-weight:600;
  color: #111;
  margin-bottom: 8px;
}

.step-desc{
  font-size: 20px;
  line-height: 1.6;
  color: #555;
}

.features {
  background: #ffffff;
  padding: 160px 20px;
}

.features-inner{
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr;
  gap: 120px;
}

.feature-block{
  max-width:800px;
}

.feature-block.highlight{
  margin-left: auto;
  text-align: right;
}

.feature-headline{
  font-size:52px;
  font-weight:700;
  line-height: 1.2;
  letter-spacing: -0.03em;
  color: #111;
  margin-bottom: 24px;
}

.feature-sub{
  font-size: 18px;
  line-height: 1.6;
  color: #555;
}

.cta{
  background: #000;
  color: #fff;
  text-align: center;
}

.cta-title{
  font-size:36px;
  font-weight:700;
  margin-bottom: 24px;
}

.cta-button{
  display: inline-block;
  padding: 14px 36px;
  background: var(--butter-yellow);
  color: #000;
  font-weight: 700;
  font-size: 16px;
  letter-spacing: -0.2px;
  
  text-decoration: none;
  border-radius: 999px;
  transition: 
    transform 0.2s ease,
    box-shadow 0.2s ease;
  
  box-shadow: 0 6px 12px rgba(255, 244, 163, 0.2);
}

.cta-button:hover{
  transform: translateY(-2px);
  box-shadow: 0 15px 30px rgba(255, 244, 163, 0.4);
  color: #000;
}

.chat-button {
  all: unset;
  background-color : #1E90FF; !important; 
  position: fixed;	!important;
  bottom: 32px;
  right: 32px;
  width: 72px;
  height: 72px;
  
  border: none;
  border-radius: 50%;
  cursor: pointer; display: flex; align-items: center; justify-content: center;
  
  box-shadow: 0 6px 16px rgba(0,0,0,0.15);
  z-index: 999998;
}

#chat-panel {
  position: fixed; 
  top: 0;
  right: 0; 
 
  width: 25vw;
  min-width: 320px;
  height: 100vh; 
  
  background: #fff;
  box-shadow: -10px 0 30px rgba(0,0,0,0.25);
  
  transform: translateX(100%);
  transition: transform 0.35s ease;
  
  display: flex;
  flex-direction: column;
   z-index: 999999;
 }

#chat-panel.open{
  right: 25vw;
}

.chat-header{
  height: 48px;
  flex-shrink: 0;
  background: #f8f9fa;
  display: flex;
  justify-content: flex-end;
  align-items: center;
  padding: 0 12px;
}

.close-button{
  background: none;
  border: none;
  font-size: 18px;
  cursor: pointer;
}

#chat-panel iframe{
  flex: 1;
  width: 100%;
  border: none;
}

body {
  background-color: transparent;
  color: #000;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Apple SD Gothic Neo", "Noto Sans KR", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  word-break: keep-all;
  letter-spacing: -0.02em;
}

.navbar-default{
  background: #000;
  border: none;
  padding: 0 0 5px;
}

a.navbar-brand{
  color: var(--butter-yellow) !important;
  font-size: 20px;
  font-weight: 500;
  letter-spacing: -0.05em;
  align-items: center;
}

li.active {
    padding: 1px 1px;
}

li.active a{
  background-color: var(--butter-yellow) !important;
  border-radius: 100px;
  color: #000 !important;
  font-weight: 700;
  margin-top: 1px;
}

.well {
  background: var(--glass-bg);
  backdrop-filter: blur(15px);
  -webkit-backdrop-filter: blur(15px);
  border: 1px solid rgba(255,255,255,0.4);
  border-radius: 24px;
  padding: 40px;
  box-shadow: 0 20px 40px rgba(0,0,0,0.05);
}

input.form-control{
  border-radius: 12px;
  border: 1px solid #eee;
  padding: 12px 16px;
  height: auto;
  background-color: rgba(255,255,255,0.8);
}

input.form-control:focus{
  border-color: var(--butter-yellow);
  box-shadow: 0 0 0 4px rgba(255, 244, 163, 0.3);
}

input.form-control:-webkit-autofill {
  -webkit-box-shadow: 0 0 0 1000px #FAFAFA inset;
}

@media (max-width: 768px) {
  .main_custom-title {font-size: 40px;}
  section {padding: 80px 20px;}
  .feature-headline {font-size:36px;}
  #chat-panel { width: 100vw; }
}

//navigation bar
.navbar {
  background: #ffffff;
  border: none;
  box-shadow: var(--shadow-sm);
}

.navbar-nav > li > a{
  color: var(--text-main);
  font-weight: 500;
}

.navbar-nav > li.active > a{
  color: var(--primary);
  background: transparent;
}

//card
.panel,
.card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border : 1px solid var(--border-light);
}

.panel-heading {
  background: transparent;
  border-bottom: 1px solid var(--border-light);
  font-weight: 600;
}


//btn
.btn{
  border-radius: #000;
  font-weight: 500;
}

.btn-primary:hover{
  background: #000;
}

.btn-default {
  background: #ffffff;
  border: 1px solid var(--border-light);
}

//form, input
.form-control{
  border-radius: var(--radius-md);
  border: 1px solid var(--border-light);
  box-shadow: none;
}

.form-control:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 2px var(--primary-soft);
}