/* ==========================================================================
   1. CSS Variables (포트폴리오 전용 통합 설정)
   ========================================================================== */
:root {
  /* Fonts */
  --default-font: "Montserrat", "Noto Sans KR", sans-serif;
  --heading-font: "Montserrat", "Noto Sans KR", sans-serif;
  --nav-font: "Montserrat", "Noto Sans KR", sans-serif;

  /* Global Colors */
  --background-color: #ffffff;
  --surface-color: #ffffff;
  --contrast-color: #ffffff;

  /* 포인트 및 텍스트 컬러 (3단계 위계 적용) */
  --heading-color: #0F2943;
  /* 1순위: 딥 네이비 (제목) */
  --text-main: #4A6278;
  /* 2순위: 다크 슬레이트 (본문) */
  --text-muted: #8E9CA8;
  /* 3순위: 연한 블루그레이 (보조) */
  --accent-color: #6B8CA3;
  /* 시그니처 포인트 컬러 */

  /* Navigation Colors */
  --nav-color: #0F2943;
  --nav-hover-color: #6B8CA3;
  --nav-dropdown-background-color: rgba(255, 255, 255, 0.98);
  --nav-dropdown-color: #0F2943;
  --nav-dropdown-hover-color: #6B8CA3;

  /* Sidebar & Mobile Settings */
  --sidebar-width: 320px;
  --sidebar-bg-color: rgba(255, 255, 255, 0.95);
  --sidebar-text-color: #0F2943;
  --sidebar-hover-color: #6B8CA3;

  --sidebar-font-size-lvl1: 16px;
  --sidebar-font-size-lvl2: 14px;
  --sidebar-font-size-lvl3: 14px;
  --sidebar-font-weight-lvl1: 700;
  --sidebar-font-weight-lvl2: 500;
  --sidebar-font-weight-lvl3: 400;

  --hamburger-icon-size: 32px;
  --hamburger-icon-color: #0F2943;
  --toggle-icon-size: 12px;
}

/* ==========================================================================
   2. Base Styles
   ========================================================================== */
html {
  scroll-behavior: smooth;
}

body {
  color: var(--text-main);
  background-color: var(--background-color);
  font-family: var(--default-font);
  overflow-x: hidden;
  line-height: 1.8;
}

a {
  color: var(--accent-color);
  text-decoration: none;
  transition: 0.5s;
}

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);
  letter-spacing: -0.02em;
  line-height: 1.3;
}

p {
  letter-spacing: -0.01em;
}

ul {
  list-style: none !important;
  padding: 0;
  margin: 0;
}

/* ==========================================================================
   3. Custom Utilities (시그니처 컬러 공통 클래스)
   ========================================================================== */
.text-signature {
  color: var(--accent-color) !important;
}

.text-navy {
  color: var(--heading-color) !important;
}

.btn-signature {
  background-color: var(--heading-color);
  color: #ffffff;
  border: solid;
  border-color: var(--accent-color);
  transition: all 0.3s ease;
}

.btn-signature:hover {
  background-color: var(--accent-color);
  color: var(--heading-color);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(107, 140, 163, 0.4);
}

/* ==========================================================================
   4. Header & Navigation
   ========================================================================== */
.header {
  background-color: var(--surface-color);
  padding: 15px 0;
  transition: all 0.8s;
  z-index: 9999;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
  border-bottom: 1px solid rgba(0, 0, 0, 0.03);
}

.header .header-container {
  padding: 0 40px;
  background: transparent;
  width: 100%;
}

@media (min-width: 1200px) {
  .header .header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
  }
}

.header .logo {
  position: relative;
  display: inline-block;
  overflow: hidden;
  height: 70px;
}

.header .logo img {
  max-height: 100%;
  margin-right: 8px;
  transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.header .logo .logo-hover {
  position: absolute;
  top: 0;
  left: 0;
  opacity: 0;
  z-index: 2;
  pointer-events: none;
}

.header .logo .logo-default {
  position: relative;
  opacity: 0.7;
  z-index: 1;
}

.header .logo:hover .logo-default {
  opacity: 0;
}

.header .logo:hover .logo-hover {
  display: inline-block;
  opacity: 1;
  transform: scale(1.05);
}

@media (max-width: 1200px) {
  .header {
    padding: 15px 0;
  }

  .header .header-container {
    padding: 0 20px;
  }
}

/* Desktop Navigation */
@media (min-width: 1200px) {
  .navmenu ul {
    display: flex;
    align-items: center;
  }

  .navmenu li {
    position: relative;
    padding: 0 15px;
  }

  .navmenu a {
    position: relative;
    color: var(--nav-color);
    padding: 10px 15px;
    font-size: 16px;
    font-family: var(--nav-font);
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1), color 0.5s cubic-bezier(0.16, 1, 0.3, 1);
  }

  .navmenu a:hover,
  .navmenu .active {
    color: var(--nav-hover-color);
    transform: translateX(5px);
  }

  .navmenu a::after {
    content: "";
    position: absolute;
    bottom: 2px;
    left: 50%;
    width: 100%;
    height: 2px;
    background-color: var(--accent-color);
    transform: translateX(-50%) scaleX(0);
    transform-origin: center;
    transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
  }

  .navmenu a:hover::after,
  .navmenu .active::after {
    transform: translateX(-50%) scaleX(1);
  }

  .navmenu a i {
    font-size: 12px;
    margin-left: 5px;
    transition: 0.3s;
  }

  .navmenu .dropdown ul {
    background: var(--nav-dropdown-background-color);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    display: block;
    position: absolute;
    visibility: hidden;
    left: 0;
    top: 130%;
    opacity: 0;
    transition: 0.5s;
    border-radius: 8px;
    z-index: 99;
    padding: 15px 0;
  }

  .navmenu .dropdown ul li {
    min-width: 220px;
    padding: 0;
  }

  .navmenu .dropdown ul a {
    padding: 12px 25px;
    font-size: 15px;
    color: var(--nav-dropdown-color);
    transform: none;
  }

  .navmenu .dropdown ul a::after {
    display: none;
  }

  .navmenu .dropdown ul a:hover,
  .navmenu .dropdown ul .active:hover {
    color: var(--nav-dropdown-hover-color);
    transform: translateX(5px);
  }

  .navmenu .dropdown:hover>ul {
    opacity: 1;
    top: 100%;
    visibility: visible;
  }

  .navmenu .dropdown .dropdown ul {
    top: 0;
    left: -100%;
    visibility: hidden;
  }

  .navmenu .dropdown .dropdown:hover>ul {
    opacity: 1;
    top: 0;
    left: -93%;
    visibility: visible;
  }
}

/* Mobile Sidebar Navigation */
@media (max-width: 1199px) {
  .mobile-nav-toggle {
    color: var(--hamburger-icon-color);
    font-size: var(--hamburger-icon-size);
    cursor: pointer;
    transition: color 0.8s cubic-bezier(0.16, 1, 0.3, 1);
    z-index: 10000;
  }

  body.mobile-nav-active::before {
    content: "";
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(4px);
    z-index: 9997;
    opacity: 1;
    visibility: visible;
    transition: opacity 0.4s cubic-bezier(0.16, 1, 0.3, 1), visibility 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  }

  body.mobile-nav-active {
    overflow: hidden;
  }

  .navmenu>ul {
    position: fixed;
    top: 0;
    right: calc(-1 * var(--sidebar-width) - 20px);
    width: var(--sidebar-width);
    height: 100vh;
    background-color: var(--sidebar-bg-color);
    padding: 100px 30px 40px 30px;
    margin: 0;
    overflow-y: auto;
    box-shadow: -5px 0 25px rgba(0, 0, 0, 0.1);
    z-index: 9998;
    transition: right 0.8s cubic-bezier(0.4, 0, 0.2, 1);
  }

  body.mobile-nav-active .navmenu>ul {
    right: 0;
  }

  .navmenu ul li {
    margin: 0;
    padding: 0;
    width: 100%;
  }

  .navmenu a {
    position: relative;
    color: var(--sidebar-text-color);
    font-family: var(--nav-font);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 15px 20px;
    margin-bottom: 5px;
    width: max-content;
    transition: transform 0.5s cubic-bezier(0.3, 0, 0.1, 1), color 0.5s cubic-bezier(0.16, 1, 0.3, 1);
  }

  .navmenu>ul>li>a {
    font-size: var(--sidebar-font-size-lvl1);
    font-weight: var(--sidebar-font-weight-lvl1);
  }

  .navmenu .dropdown>ul>li>a {
    font-size: var(--sidebar-font-size-lvl2);
    font-weight: var(--sidebar-font-weight-lvl2);
  }

  .navmenu .dropdown .dropdown>ul>li>a {
    font-size: var(--sidebar-font-size-lvl3);
    font-weight: var(--sidebar-font-weight-lvl3);
  }

  .navmenu a:hover,
  .navmenu .active {
    color: var(--sidebar-hover-color);
    transform: translateX(6px);
  }

  .navmenu a::after {
    content: "";
    position: absolute;
    bottom: 5px;
    left: 50%;
    width: 100%;
    height: 2px;
    background-color: var(--accent-color);
    transform: translateX(-50%) scaleX(0);
    transform-origin: center;
    transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
  }

  .navmenu a:hover::after,
  .navmenu .active::after {
    transform: translateX(-50%) scaleX(1);
  }

  .navmenu a i {
    font-size: var(--toggle-icon-size);
    margin-left: 15px;
    transition: transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
  }

  .navmenu .dropdown>ul {
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    padding-left: 15px;
    transition: max-height 0.8s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), padding 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  }

  .navmenu .dropdown:hover>ul {
    max-height: 800px;
    opacity: 1;
    padding-top: 5px;
    padding-bottom: 15px;
  }

  .navmenu .dropdown:hover>a>i {
    transform: rotate(180deg);
  }

  .navmenu .dropdown.active {
    background-color: rgba(107, 140, 163, 0.05);
  }

  .navmenu .dropdown>ul::before {
    content: "";
    position: absolute;
    top: -20px;
    left: 0;
    width: 100%;
    height: 20px;
    background: transparent;
  }
}

/* ==========================================================================
   5. Sections & Layout
   ========================================================================== */
section,
.section {
  background-color: var(--background-color);
  padding: 60px 0;
  scroll-margin-top: 90px;
  overflow: clip;
}

@media (max-width: 1199px) {

  section,
  .section {
    scroll-margin-top: 70px;
  }
}

.breadcrumb-item {
  padding-top: 90px;
}

.section-title {
  text-align: center;
  padding-bottom: 60px;
  position: relative;
}

.section-title h2,
.section-title h3 {
  font-size: 30px;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--heading-color);
}

.section-title h2 {
  font-size: 42px;
}

.section-title p {
  margin: 15px auto 0;
  font-size: 16px;
  max-width: 700px;
  color: var(--text-muted);
  line-height: 1.8;
}

/* Scroll Top Button */
.scroll-top {
  position: fixed;
  visibility: hidden;
  opacity: 0;
  right: 15px;
  bottom: -15px;
  z-index: 99999;
  background-color: color-mix(in srgb, var(--accent-color), transparent 10%);
  width: 44px;
  height: 44px;
  border-radius: 50px;
  transition: all 0.6s;
}

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

.scroll-top:hover {
  background-color: var(--heading-color);
}

.scroll-top.active {
  visibility: visible;
  opacity: 1;
  bottom: 15px;
}

/* ==========================================================================
   6. Components (Hero, Resume, Skills, Portfolio, Contact)
   ========================================================================== */

/* Hero Section */
.hero {
  padding: 80px 0;
  position: relative;
  overflow: hidden;
}

.hero .content h2 {
  font-size: 3.5rem;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1.5rem;
}

.hero .content .lead {
  font-size: 1.25rem;
  margin-bottom: 2rem;
  color: var(--text-main);
}

.hero .hero-image img {
  border-radius: 20px;
}

/* Resume & Portfolio Filters */
#resume .resume-navigation,
.portfolio .portfolio-filters {
  display: flex !important;
  justify-content: center !important;
  gap: 60px !important;
  border: none !important;
  margin-bottom: 50px !important;
  padding: 0;
}

#resume .nav-pills .nav-link,
.portfolio .portfolio-filters li {
  position: relative;
  background: transparent !important;
  border-radius: 0 !important;
  border: none !important;
  padding: 15px 5px !important;
  color: var(--text-muted) !important;
  font-family: var(--nav-font);
  cursor: pointer;
  transition: transform 0.7s cubic-bezier(0.16, 1, 0.3, 1), color 0.7s cubic-bezier(0.16, 1, 0.3, 1);
  display: inline-flex;
  align-items: center;
}

#resume .nav-link:hover,
#resume .nav-link.active,
.portfolio .portfolio-filters li:hover,
.portfolio .portfolio-filters li.filter-active {
  color: var(--heading-color) !important;
  transform: translateX(6px);
}

#resume .nav-link::after,
.portfolio .portfolio-filters li::after {
  content: "";
  position: absolute;
  bottom: 5px;
  left: 50%;
  width: 100%;
  height: 2px;
  background-color: var(--accent-color);
  transform: translateX(-50%) scaleX(0);
  transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

#resume .nav-link:hover::after,
#resume .nav-link.active::after,
.portfolio .portfolio-filters li:hover::after,
.portfolio .portfolio-filters li.filter-active::after {
  transform: translateX(-50%) scaleX(1);
}

@media (max-width: 768px) {

  #resume .resume-navigation,
  .portfolio .portfolio-filters {
    gap: 20px !important;
    flex-wrap: wrap;
  }
}

/* Skills Section */
.skills .skill-box {
  background-color: var(--surface-color);
  padding: 2rem;
  border-radius: 8px;
  box-shadow: 0 0 20px rgba(0, 0, 0, 0.05);
}

.skills .skill-box h3 {
  font-size: 1.2rem;
  margin-bottom: 1rem;
  font-weight: 600;
}

.progress {
  background-color: color-mix(in srgb, var(--accent-color), transparent 85%);
  border-radius: 50px;
  height: 8px;
  margin-top: 5px;
  overflow: hidden;
}

.progress .progress-bar {
  background-color: var(--accent-color) !important;
  height: 100%;
  border-radius: 50px;
  transition: 0.9s;
}

.skill-card {
  background: #ffffff;
  border: 1px solid rgba(0, 0, 0, 0.05);
  border-radius: 12px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.02);
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.skill-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 25px rgba(107, 140, 163, 0.15);
  border-color: rgba(107, 140, 163, 0.3);
}

.skill-card img {
  border-radius: 8px;
}

/* Portfolio Grid */
.portfolio-card {
  background: transparent;
  border-radius: 0;
  overflow: hidden;
  box-shadow: none;
  transition: transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

.portfolio-card:hover {
  transform: translateY(-10px);
}

.portfolio-image {
  border-radius: 12px;
  overflow: hidden;
  aspect-ratio: 16/10;
}

.portfolio-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.portfolio-card:hover .portfolio-image img {
  transform: scale(1.05);
}

.img-contain {
  object-fit: contain !important;
  padding: 15px;
}

/* Portfolio Details */
.portfolio-details {
  padding-top: 40px;
}

.portfolio-details .img-fluid {
  width: 100%;
  border-radius: 8px;
  margin-bottom: 30px;
}

.portfolio-details .position-sticky {
  top: 100px;
}

.portfolio-details .portfolio-description h2 {
  font-size: 26px;
  font-weight: 700;
  margin-bottom: 20px;
  font-family: var(--nav-font);
}

.portfolio-details .portfolio-description p {
  margin-bottom: 20px;
  color: var(--text-main);
}

.portfolio-details .testimonial-item {
  padding: 30px;
  margin: 30px 0;
  background: #f8f9fa;
  border-radius: 10px;
  position: relative;
}

.portfolio-details .testimonial-item span {
  display: block;
  line-height: 1.8;
  color: var(--text-main);
}

.portfolio-details .portfolio-info {
  padding: 30px;
  box-shadow: 0px 0px 30px rgba(0, 0, 0, 0.05);
  background: #fff;
  border-radius: 10px;
}

.portfolio-details .portfolio-info h3 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 20px;
  padding-bottom: 20px;
  border-bottom: 1px solid #eee;
  font-family: var(--nav-font);
}

.portfolio-details .portfolio-info ul {
  font-size: 15px;
}

.portfolio-details .portfolio-info ul li {
  padding-bottom: 15px;
  display: flex;
  flex-direction: column;
}

.portfolio-details .portfolio-info ul strong {
  text-transform: uppercase;
  font-weight: 600;
  color: var(--text-muted);
  font-size: 13px;
  margin-bottom: 5px;
}

.portfolio-details .portfolio-info ul li p {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 10px 0 0 0;
}

.portfolio-details .portfolio-info ul li p:hover img {
  filter: grayscale(0);
}



/* ==========================================================================
   7. Portfolio Details Navigation (하단 이전/다음 버튼 애니메이션)
   ========================================================================== */
.portfolio-nav-links a {
  transition: transform 0.3s ease, color 0.3s ease;
}

/* 화살표 및 글자 색상 변화 */
.portfolio-nav-links a:hover i,
.portfolio-nav-links a:hover .text-navy {
  color: var(--accent-color) !important;
  /* 마우스 올리면 시그니처 블루로 변경 */
}

/* PREVIOUS 버튼: 마우스 올리면 왼쪽으로 살짝 이동 */
.portfolio-nav-links a.text-start:hover {
  transform: translateX(-5px);
}

/* NEXT 버튼: 마우스 올리면 오른쪽으로 살짝 이동 */
.portfolio-nav-links a.text-end:hover {
  transform: translateX(5px);
}

/* 가운데 그리드 아이콘: 색상만 변경 */
.portfolio-nav-links a.text-center:hover {
  transform: translateY(-5px);

}

/* ==========================================================================
   8. Ultra Small Mobile (320px 등 초소형 화면 최적화)
   ========================================================================== */
@media (max-width: 360px) {

  /* 1. 컨택트 하얀 박스 자체의 뚱뚱한 여백(p-5)을 줄입니다. */
  .contact .contact-info {
    padding: 2rem 1rem !important;
  }

  /* 2. 이메일/전화번호 양옆의 마진(mx-4)을 확 줄여 글자 공간을 확보합니다. */
  .contact .contact-info .mx-4 {
    margin-left: 0.5rem !important;
    margin-right: 0.5rem !important;
  }

  /* 3. 텍스트(이메일, 전화번호 등) 폰트 사이즈를 축소합니다. */
  .contact .contact-info span {
    font-size: 0.85rem !important;
    word-break: break-all;
    /* 만약 그래도 넘치면 강제로 줄바꿈 하라는 안전장치 */
  }

  /* 4. 글자가 작아진 만큼 앞의 아이콘 크기도 밸런스에 맞게 줄입니다. */
  .contact .contact-info i {
    font-size: 1.2rem !important;
  }
}


/* Video Container */
.video-container {
  width: 100%;
  max-height: 900px;
  margin: 0 auto 50px auto;
  display: block;
  aspect-ratio: 16/9;
  border-radius: 12px;
  overflow: hidden;
}

.video-container iframe {
  width: 100%;
  height: 100%;
  border: 0;
}

/* Contact Section */
.contact .section-category {
  font-family: var(--heading-font);
  font-weight: 600;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.contact .content h2 {
  font-weight: 700;
  line-height: 1.2;
}

.contact .contact-info .info-item i {
  color: var(--accent-color);
  font-size: 1.4rem;
}

/* Footer */
.footer {
  background-color: var(--background-color);
  font-size: 14px;
  padding: 40px 0;
  position: relative;
  box-shadow: 0 -5px 25px rgba(0, 0, 0, 0.05);
}

.footer .credits {
  margin-top: 10px;
  font-size: 13px;
  text-align: center;
}

/* ==========================================================================
   9. Hero Video Background
   ========================================================================== */
.hero-bg-video {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  /* 화면 비율이 달라도 여백 없이 꽉 채움 */
  z-index: 0;
}

/* 글자가 잘 보이게 해주는 하얀색 반투명 셀로판지 */
.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(255, 255, 255, 0.85);
  /* 0.85는 투명도. 숫자가 클수록 하얗게 됨 */
  z-index: 1;
}