/**
* Custom CSS for Steel Company Website
* Copyright-free custom styling
* Based on standard web practices and Bootstrap framework
*/

/*--------------------------------------------------------------
# Font & Color Variables
--------------------------------------------------------------*/
:root {
  --default-font: "Noto Sans KR", "Roboto", system-ui, -apple-system, "Segoe UI", sans-serif;
  --heading-font: "Noto Sans KR", sans-serif;
  --nav-font: "Noto Sans KR", sans-serif;
}

/* Global Colors */
:root { 
  --background-color: #ffffff;
  --default-color: #2c3e50;
  --heading-color: #1a252f;
  --accent-color: #3498db;
  --surface-color: #ffffff;
  --contrast-color: #ffffff;
}

/* Nav Menu Colors */
:root {
  --nav-color: #2c3e50;
  --nav-hover-color: #3498db;
  --nav-mobile-background-color: #ffffff;
  --nav-dropdown-background-color: #ffffff;
  --nav-dropdown-color: #2c3e50;
  --nav-dropdown-hover-color: #3498db;
}

/*--------------------------------------------------------------
# General Styling & Shared Classes
--------------------------------------------------------------*/
body {
  color: var(--default-color);
  background-color: var(--background-color);
  font-family: var(--default-font);
  line-height: 1.6;
}

a {
  color: var(--accent-color);
  text-decoration: none;
  transition: 0.3s;
}

a:hover {
  color: color-mix(in srgb, var(--accent-color), transparent 25%);
  text-decoration: none;
}

h1, h2, h3, h4, h5, h6 {
  color: var(--heading-color);
  font-family: var(--heading-font);
  font-weight: 600;
}

/*--------------------------------------------------------------
# Header & Navigation
--------------------------------------------------------------*/
.header {
  --background-color: #ffffff;
  --default-color: #2c3e50;
  --heading-color: #1a252f;
  color: var(--default-color);
  background-color: var(--background-color);
  padding: 15px 0;
  transition: all 0.5s;
  z-index: 997;
  box-shadow: 0px 0 18px rgba(44, 62, 80, 0.1);
}

.header .logo {
  line-height: 1;
}

.header .logo img {
  max-height: 36px;
  margin-right: 8px;
}

.header .logo h1 {
  font-size: 24px;
  margin: 0;
  font-weight: 700;
  color: var(--heading-color);
}

/*--------------------------------------------------------------
# Navigation Menu
--------------------------------------------------------------*/
.navmenu {
  padding: 0;
  z-index: 9997;
}

.navmenu ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  align-items: center;
}

.navmenu li {
  position: relative;
}

.navmenu > ul > li {
  white-space: nowrap;
  padding: 15px 14px;
}

.navmenu a,
.navmenu a:focus {
  color: var(--nav-color);
  padding: 18px 15px;
  font-size: 16px;
  font-family: var(--nav-font);
  font-weight: 500;
  display: flex;
  align-items: center;
  justify-content: space-between;
  white-space: nowrap;
  transition: 0.3s;
  position: relative;
}

.navmenu a i,
.navmenu a:focus i {
  font-size: 12px;
  line-height: 0;
  margin-left: 5px;
  transition: 0.3s;
}

.navmenu > ul > li > a:before {
  content: "";
  position: absolute;
  width: 100%;
  height: 2px;
  bottom: -6px;
  left: 0;
  background-color: var(--nav-hover-color);
  visibility: hidden;
  width: 0px;
  transition: all 0.3s ease-in-out 0s;
}

.navmenu a:hover:before,
.navmenu li:hover > a:before,
.navmenu .active:before {
  visibility: visible;
  width: 100%;
}

.navmenu a:hover,
.navmenu .active,
.navmenu .active:focus,
.navmenu li:hover > a {
  color: var(--nav-hover-color);
}

/*--------------------------------------------------------------
# Mobile Navigation
--------------------------------------------------------------*/
@media (max-width: 1199px) {
  .mobile-nav-toggle {
    color: var(--nav-color);
    font-size: 28px;
    line-height: 0;
    margin-right: 10px;
    cursor: pointer;
    transition: color 0.3s;
  }

  .navmenu {
    padding: 0;
    z-index: 9997;
  }

  .navmenu ul {
    display: none;
    position: absolute;
    inset: 60px 20px 20px 20px;
    padding: 10px 0;
    margin: 0;
    border-radius: 6px;
    background-color: var(--nav-mobile-background-color);
    overflow-y: auto;
    transition: 0.3s;
    z-index: 9998;
    box-shadow: 0px 0px 30px rgba(44, 62, 80, 0.1);
  }

  .navmenu a,
  .navmenu a:focus {
    padding: 10px 20px;
    font-size: 17px;
    font-weight: 500;
    display: flex;
    align-items: center;
    justify-content: space-between;
    white-space: nowrap;
    transition: 0.3s;
  }
}

/*--------------------------------------------------------------
# Hero Section
--------------------------------------------------------------*/
.hero {
  width: 100%;
  min-height: 60vh;
  position: relative;
  padding: 80px 0 60px 0;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
}

.hero h1 {
  margin: 0 0 20px 0;
  font-size: 48px;
  font-weight: 700;
  color: #ffffff;
}

.hero p {
  color: #ecf0f1;
  margin: 5px 0 30px 0;
  font-size: 20px;
  font-weight: 400;
}

.hero .btn-get-started {
  font-weight: 500;
  font-size: 16px;
  letter-spacing: 1px;
  display: inline-block;
  padding: 12px 40px;
  border-radius: 5px;
  transition: 0.5s;
  margin: 10px 0 0 0;
  color: #ffffff;
  background: var(--accent-color);
  border: 2px solid var(--accent-color);
}

.hero .btn-get-started:hover {
  background: transparent;
  border-color: #ffffff;
  color: #ffffff;
}

/*--------------------------------------------------------------
# Sections General
--------------------------------------------------------------*/
section,
.section {
  color: var(--default-color);
  background-color: var(--background-color);
  padding: 60px 0;
  scroll-margin-top: 88px;
  overflow: clip;
}

/*--------------------------------------------------------------
# Section Titles
--------------------------------------------------------------*/
.section-title {
  text-align: center;
  padding-bottom: 60px;
  position: relative;
}

.section-title h2 {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 20px;
  padding-bottom: 20px;
  position: relative;
  color: var(--heading-color);
}

.section-title h2:after {
  content: "";
  position: absolute;
  display: block;
  width: 50px;
  height: 3px;
  background: var(--accent-color);
  left: 0;
  right: 0;
  bottom: 0;
  margin: auto;
}

.section-title p {
  margin-bottom: 0;
  font-size: 18px;
  color: color-mix(in srgb, var(--default-color), transparent 20%);
}

/*--------------------------------------------------------------
# About Section
--------------------------------------------------------------*/
.about .content h3 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--heading-color);
  margin-bottom: 1rem;
}

.about .content p {
  margin-bottom: 1.5rem;
  font-size: 1.1rem;
  line-height: 1.8;
}

.about .content ul {
  list-style: none;
  padding: 0;
}

.about .content ul li {
  padding: 10px 0;
  display: flex;
  align-items: center;
}

.about .content ul i {
  color: var(--accent-color);
  margin-right: 10px;
  font-size: 20px;
}

/*--------------------------------------------------------------
# Services Section
--------------------------------------------------------------*/
.services .service-item {
  background-color: var(--surface-color);
  padding: 30px;
  border-radius: 10px;
  text-align: center;
  transition: all 0.3s ease-in-out;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
  height: 100%;
}

.services .service-item:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
}

.services .service-item .icon {
  font-size: 48px;
  color: var(--accent-color);
  margin-bottom: 20px;
}

.services .service-item h4 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 15px;
  color: var(--heading-color);
}

.services .service-item p {
  font-size: 1rem;
  line-height: 1.6;
  color: var(--default-color);
}

/*--------------------------------------------------------------
# Contact Section
--------------------------------------------------------------*/
.contact .info-wrap {
  background-color: var(--surface-color);
  padding: 30px;
  border-radius: 10px;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.contact .info-item {
  margin-bottom: 40px;
}

.contact .info-item i {
  font-size: 20px;
  color: var(--accent-color);
  background: color-mix(in srgb, var(--accent-color), transparent 90%);
  width: 44px;
  height: 44px;
  display: flex;
  justify-content: center;
  align-items: center;
  border-radius: 50px;
  transition: all 0.3s ease-in-out;
  margin-right: 15px;
}

.contact .info-item h3 {
  padding: 0;
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 5px;
  color: var(--heading-color);
}

.contact .info-item p {
  padding: 0;
  margin-bottom: 0;
  font-size: 14px;
  color: var(--default-color);
}

/*--------------------------------------------------------------
# Footer
--------------------------------------------------------------*/
.footer {
  color: var(--default-color);
  background-color: color-mix(in srgb, var(--default-color), transparent 95%);
  font-size: 14px;
  text-align: center;
  padding: 30px 0;
  position: relative;
}

.footer h3 {
  font-size: 36px;
  font-weight: 700;
  position: relative;
  color: var(--heading-color);
  padding: 0;
  margin: 0 0 15px 0;
}

.footer p {
  font-size: 15px;
  font-style: italic;
  padding: 0;
  margin: 0 0 30px 0;
}

.footer .copyright {
  padding-top: 25px;
  border-top: 1px solid color-mix(in srgb, var(--default-color), transparent 90%);
}

.footer .credits {
  padding-top: 4px;
  font-size: 13px;
  color: color-mix(in srgb, var(--default-color), transparent 30%);
}

/*--------------------------------------------------------------
# Scroll Top Button
--------------------------------------------------------------*/
.scroll-top {
  position: fixed;
  visibility: hidden;
  opacity: 0;
  right: 15px;
  bottom: 15px;
  z-index: 99999;
  background-color: var(--accent-color);
  width: 44px;
  height: 44px;
  border-radius: 50px;
  transition: all 0.4s;
}

.scroll-top i {
  font-size: 24px;
  color: var(--contrast-color);
  line-height: 0;
}

.scroll-top:hover {
  background-color: color-mix(in srgb, var(--accent-color), transparent 20%);
  color: var(--contrast-color);
}

.scroll-top.active {
  visibility: visible;
  opacity: 1;
}

/*--------------------------------------------------------------
# Utility Classes
--------------------------------------------------------------*/
.text-center {
  text-align: center !important;
}

.text-left {
  text-align: left !important;
}

.text-right {
  text-align: right !important;
}

.mt-0 { margin-top: 0 !important; }
.mt-1 { margin-top: 0.25rem !important; }
.mt-2 { margin-top: 0.5rem !important; }
.mt-3 { margin-top: 1rem !important; }
.mt-4 { margin-top: 1.5rem !important; }
.mt-5 { margin-top: 3rem !important; }

.mb-0 { margin-bottom: 0 !important; }
.mb-1 { margin-bottom: 0.25rem !important; }
.mb-2 { margin-bottom: 0.5rem !important; }
.mb-3 { margin-bottom: 1rem !important; }
.mb-4 { margin-bottom: 1.5rem !important; }
.mb-5 { margin-bottom: 3rem !important; }

.p-0 { padding: 0 !important; }
.p-1 { padding: 0.25rem !important; }
.p-2 { padding: 0.5rem !important; }
.p-3 { padding: 1rem !important; }
.p-4 { padding: 1.5rem !important; }
.p-5 { padding: 3rem !important; }

/*--------------------------------------------------------------
# Responsive Design
--------------------------------------------------------------*/
@media (max-width: 768px) {
  .hero h1 {
    font-size: 32px;
    line-height: 36px;
  }

  .hero p {
    font-size: 18px;
    line-height: 24px;
    margin-bottom: 30px;
  }

  .section-title h2 {
    font-size: 28px;
  }
}

@media (max-width: 575px) {
  .hero h1 {
    font-size: 28px;
    line-height: 32px;
  }

  .hero p {
    font-size: 16px;
    line-height: 22px;
  }

  .section-title h2 {
    font-size: 24px;
  }
}