/* =========================================================
   waLLLnut Responsive CSS (rwd.css)
   Mobile-first approach with breakpoints:
   - Mobile: 320px - 767px
   - Tablet: 768px - 1023px  
   - Desktop: 1024px+
   ========================================================= */


/* ========== Mobile Styles (500px - 766px) Section03 background img ========== */
@media screen and (min-width: 500px) and (max-width: 766px) {
  .title-area{background-image: url('../asset/sec03-moTa-500766-bg.png') !important; background-size: cover !important;}
}

/* ========== Mobile Styles (320px - 767px) ========== */
@media screen and (max-width: 767px) {
  
  /* Base Container */
  .container {
    max-width: 100%;
    padding-left: 16px;
    padding-right: 16px;
  }

  /* Fix z-index and positioning issues */
  section {
    position: relative;
    z-index: auto;
  }

  /* Ensure proper stacking order */
  #sec01 { z-index: 10; }
  #sec02 { z-index: 9; }
  #sec03 { z-index: 8; }
  #sec04 { z-index: 7; }
  #sec05 { z-index: 6; }
  #sec06 { z-index: 5; }
  #sec07 { z-index: 4; }
  #sec08 { z-index: 3; }

  /* ========== Mobile Header Navigation ========== */
  .header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    width: 100%;
    height: 80px;
    max-width: none;
    transform: none;
    background: none;
    backdrop-filter: none;
    border-radius: 0;
    box-shadow: none;
    padding: 32px 16px 12px 16px;
    z-index: 1000;
    flex-direction: row;
    justify-content: space-between;
    align-items: flex-start;
    gap: 0;
  }

  .logo-menus {
    width: auto;
    justify-content: flex-start;
    align-items: center;
    gap: 12px;
    position: relative;
  }

  .logo-menus img {
    width: 46px;
    height: 46px;
    border-radius: 12px;
    padding-right: 0;
    transition: opacity 0.3s ease;
    box-shadow: var(--elev);
  }
  .lang-dd-wrap > button{box-shadow: var(--elev);}

  /* Hide logo when menu is open */
  .logo-menus.menu-open img {
    opacity: 0;
    pointer-events: none;
  }

  /* Mobile Menu Button */
  .mobile-menu-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 8px 16px;
    background: #FFFFFF;
    border: none;
    border-radius: 12px;
    box-shadow: var(--elev);
    font-size: 14px;
    font-weight: 500;
    color: #333;
    cursor: pointer;
    transition: all 0.3s ease;
    min-height: 44px;
  }

  .mobile-menu-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 8px 32px rgba(0,0,0,0.15);
  }


  /* Navigation - Hidden by default */
  .nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    width: 320px;
    overflow: hidden;
    border-radius: 12px;
    background-color: #FFFFFF;
    box-shadow: var(--elev);
    padding: 16px;
    margin-top: 8px;
    flex-direction: column;
    gap: 4px;
    opacity: 0;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    z-index: 1001;
    overflow-x: auto;
  }

  /* Show navigation when menu is open */
  .logo-menus.menu-open .nav {
    display: flex;
    opacity: 1;
    transform: translateY(0);
  }

  /* Close button inside nav */
  .nav-close-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 12px 16px;
    background: #f5f5f5;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    color: #333;
    cursor: pointer;
    transition: background-color 0.2s ease;
    margin-bottom: 8px;
    min-height: 44px;
  }

  .nav-close-btn:hover {
    background: #e0e0e0;
  }

  .nav a {
    padding: 12px 16px;
    border-radius: 8px;
    transition: background-color 0.2s ease;
    min-height: 44px;
    display: flex;
    align-items: center;
  }

  .nav a:hover {
    background: var(--hover-bg);
  }

  /* Language Dropdown - Hide when menu is open */
  .lang-dd {
    padding-left: 0;
    margin-left: 0;
    transition: opacity 0.3s ease;
  }

  .lang-dd-label {
    display: none;
  }

  .logo-menus.menu-open ~ .lang-dd {
    opacity: 0;
    pointer-events: none;
  }

  .lang-dd-btn {
    width: 76px;
    height: 46px;
    border-radius: 12px;
  }

  /* Language Dropdown Menu positioning */
  .lang-dd-menu {
    bottom: auto;
    top: calc(100% + 12px);
    right: 0;
    min-width: 160px;
  }

  /* Ensure proper stacking */
  .header {
    z-index: 1000;
  }

  .nav {
    z-index: 1001;
  }

  /* Animation for smooth transitions */
  .logo-menus {
    transition: all 0.3s ease;
  }

  /* Overlay to close menu when clicking outside */
  .mobile-menu-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.3);
    z-index: 999;
    opacity: 0;
    transition: opacity 0.3s ease;
  }

  .mobile-menu-overlay.active {
    display: block;
    opacity: 1;
  }

  /* Section 01 - Countdown */
  #sec01 {
    padding: 120px 0 80px;
    height: auto;
    min-height: 100vh;
    background: #000000;
    color: #FFFFFF;
  }

  .count-wrap {
    flex-direction: row;
    gap: 8px;
    margin-bottom: 40px;
    justify-content: center;
    align-items: center;
  }

  .time-box {
    min-width: auto;
    width: 92px;
    height: auto;
    border-radius: 0;
    background: transparent;
    padding: 0;
  }

  .time-box:hover {
    background: transparent;
  }

  .time-value {
    font-size: 48px;
    font-weight: 700;
    color: #FFFFFF;
  }

  .time-label {
    font-size: 14px;
    color: #FFFFFF;
    margin-top: 4px;
    opacity: 0.8;
  }

  /* Add colon separators */
  .banner-title {
    padding: 0 20px;
  }

  .banner-title .sec01-title {
    font-size: 16px;
    line-height: 1.4;
    margin-bottom: 8px;
    color: #FFFFFF;
  }

  .banner-title .s-t-01 {
    color: #FFFFFF;
    filter: none;
  }

  .banner-title .s-t-02 {
    color: rgba(255, 255, 255, 0.7);
    filter: none;
  }

  /* Section 02 - Strip */
  .strip {
    height: 80px;
    padding: 0 20px;
  }

  .strip p {
    font-size: 12px;
    line-height: 1.4;
  }

  /* Section 03 - Technology */
  #sec03 {
    padding: 80px 20px;
  }

  .tech-split {
    height: auto;
    flex-direction: column;
    gap: 16px;
  }

  .tech-panel {
    padding: 20px;
    border-radius: 16px;
    width: 100%;
    flex: none;
  }

  .tech-panel.active {
    background: #FFFFFF;
    box-shadow: 0 4px 16px rgba(0,0,0,0.1);
  }

  .tech-panel.inactive {
    background: #DEDBD8;
    cursor: pointer;
    transition: all 0.3s ease;
  }

  .tech-panel.inactive:hover {
    background: #d0ccc8;
    transform: translateY(-2px);
  }

  /* Active panel content */
  .tech-panel.active .inner {
    display: block;
  }

  .tech-panel.active .inactive-head {
    display: none;
  }

  .tech-panel.active .content,
  .tech-panel.active .actions {
    display: block;
  }

  /* Inactive panel content */
  .tech-panel.inactive .inner {
    display: none;
  }

  .tech-panel.inactive .inactive-head {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 8px 0;
  }

  .tech-panel.inactive .content,
  .tech-panel.inactive .actions {
    display: none;
  }

  /* Inactive header styling */
  .arrow-down{transform: rotate(90deg);}
  .arrow-up{transform: rotate(90deg); padding-left: 12px;}

  .panel-thumb.pt-1{top: -20px; left: -22px;}
  .panel-thumb.pt-2{bottom: -20px; right: -20px;}
  .inactive-head .panel-thumb {
    object-fit: cover;
  }

  .inactive-icon-tabs {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: space-between;
  }

  .inactive-title {
    font-size: 18px;
    font-weight: 700;
    color: #333;
    margin: 0;
  }

  .arrow-down {
    color: #666;
    font-size: 24px;
  }

  /* Active panel content styling */
  .tech-title-lg {
    font-size: 28px;
    margin-bottom: 16px;
    font-weight: 800;
    color: #0F0F10;
  }

  .tech-subtitle {
    font-size: 14px;
    margin-bottom: 16px;
    color: #666;
    line-height: 1.4;
  }

  .captionKey {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 12px;
    color: #333;
  }

  .tech-body {
    width: 90%;
    font-size: 14px;
    line-height: 1.5;
  }

  .tech-body li {
    margin-bottom: 8px;
  }

  .tech-ref {
    margin-top: 16px;
    font-size: 13px;
  }

  .actions {
    margin-top: 24px;
    justify-content: center;
  }

  .actions .action-icon {
    display: none;
  }

  /* Section 04 - Service Slider */
  #sec04 {
    padding: 80px 20px;
  }

  .svc-item {
    display: block;
    padding: 20px 0;
  }

  .svc-a {
    width: 100%;
    height: 320px;
    margin-bottom: 24px;
    border-radius: 16px;
  }

  .svc-right {
    height: auto;
    gap: 20px;
  }

  .svc-b {
    align-items: flex-start;
    text-align: left;
  }

  .svc-title {
    font-size: 32px !important;
    line-height: 1.2;
  }

  .svc-desc {
    font-size: 14px;
    max-width: none;
  }

  .svc-c {
    height: 128px;
    padding: 16px;
  }

  .svc-c-title{color: #807F7F; font-size: 14px;}


  .svc-c img.s-img-1 {
    width: 220px;
    left: -80px;
  }

  .svc-c img.s-img-2 {
    width: 280px;
    left: -120px;
  }

  .svc-c img.s-img-3 {
    width: 200px;
    left: -60px;
  }

  .svc-c img.s-img-4 {
    width: 200px;
    left: -40px;
  }

  .svc-c-title2 {
    font-size: 24px;
    padding-top: 8px;
  }

  .svc-bot{margin-top: 12px;}

  .svc-cont {
    justify-content: center;
    position: relative;
    top: -20px;
  }

  /* Section 05 - Goal */
  #sec05 {
    padding: 80px 0;
  }

  .goal-wrap {
    padding: 40px 16px;
    gap: 30px;
  }

  .title-area {
    width: 100%;
    height: 720px;
    background: url('../asset/sec05-bg-moblie.png') no-repeat center center;
    background-size: contain;
    background-position: center;
  }

  .title-graphic{width: 65% !important;}
  .frame-content {
    top: 20px;
    right: 20px;
    bottom: 20px;
    left: 20px;
    row-gap: 8px;
  }

  .goal-wrap .section-label{padding-bottom: 4px;}
  .goal-caption{padding: 12px 20px; display: flex; flex-direction: column; align-items: center;}
  .goal-caption .p {
    width: 78%;
    font-size: 14px;
  }

  .goal-dropdown-container {
    max-width: 100%;
    margin-top: 0px;
  }

  .goal-dropdown-header {
    padding: 16px 20px;
  }

  .goal-dropdown-question {
    font-size: 14px;
  }

  /* Goal Dropdown Content - Hash text styling */
  .goal-dropdown-content {
    padding: 16px;
  }

  .goal-dropdown-text {
    font-size: 14px;
    line-height: 1.5;
    margin-bottom: 12px;
  }

  .item-drop {
    margin-bottom: 16px;
    padding: 12px;
    background: #f8f8f8;
    border-radius: 8px;
    border-left: 3px solid #667eea;
  }

  .item-drop p {
    margin: 0;
    font-size: 13px;
    line-height: 1.4;
  }

  .item-drop p:first-child {
    font-weight: 600;
    margin-bottom: 8px;
    color: #333;
  }

  .item-drop p:last-child {
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: 11px;
    color: #666;
    word-break: break-all;
    line-height: 1.3;
    background: rgba(255, 255, 255, 0.8);
    padding: 8px;
    border-radius: 4px;
    border: 1px solid #e0e0e0;
  }

  /* Section 06 - Experience - Complete restructure */
  #sec06 {
    padding: 80px 20px;
    position: relative;
    z-index: 1;
  }

  #sec06 > h2{margin: 0;}

  /* Property Container - Full restructure */
  .property-container {
    display: flex;
    flex-direction: column;
    gap: 20%;
    margin-bottom: 40px;
  }

  .property-content {
    display: block;
  }

  .property-title {
    font-size: 36px;
    font-weight: 800;
    line-height: 1.1;
    color: #0F0F10;
    text-align: left;
    position: static;
    top: auto;
    min-width: auto;
    flex: none;
    margin: 16px 0 32px 0;
  }

  .images-container {
    position: relative;
    width: 100%;
    /* height: 200px; */
    margin-bottom: 30px;
    overflow: visible;
    top: auto;
    min-width: auto;
  }

  .main-image {
    position: absolute;
    width: 100%;
    height: 280px;
    top: 0;
    left: 0;
    border-radius: 24px;
    overflow: hidden;
    background: #f0f0f0;
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .main-image .img-siz {
    width: 100%;
    height: 100%;
    object-fit: cover;
  }

  .small-image {
    position: absolute;
    bottom: -40px;
    right: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2;
  }

  .small-image > img{width: 100%;}

  .property-features {
    list-style: none;
    padding-left: 0;
    margin: 0 0 60px 0;
    bottom: -28px;
  }

  .property-features li {
    font-size: 14px;
    color: #555;
    position: relative;
    padding-left: 16px;
    line-height: 1.5;
  }

  .property-features li:before {
    content: '•';
    position: absolute;
    left: 0;
    color: #667eea;
    font-weight: bold;
    font-size: 16px;
  }

  .architecture-diagram {
    width: 100%;
    background: white;
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
  }

  .architecture-diagram > img {
    width: 100%;
    height: auto;
    display: block;
  }

  /* Use Cases Section */
  .use-cases-section {
    margin-bottom: 80px;
  }

  .use-cases-title {
    background: #DEDBD8;
    color: #403E3C;
    padding: 8px 20px;
    border-radius: 20px;
    font-family: "Asap Condensed", sans-serif;
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 0;
    display: inline-block;
  }

  .use-case {
    margin-bottom: 24px;
  }

  .use-case-title {
    font-size: 16px;
    font-weight: 700;
    color: #2c3e50;
    margin-bottom: 8px;
    line-height: 1.3;
  }

  .use-case-desc {
    font-size: 14px;
    color: #666;
    line-height: 1.5;
    margin: 0;
  }

  .roadmap-title {
    margin-top: 80px;
    margin-bottom: 40px;
    width: 100%;
  }

  .roadmap-item {
    padding: 20px;
    max-width: 100%;
  }

  .roadmap-date {
    font-size: 16px;
    padding: 8px 16px;
    border-radius: 20px;
    background: #ff9800;
    color: #0F0F10;
    font-family: "Asap Condensed", sans-serif;
    font-weight: 600;
    display: inline-block;
    margin-bottom: 12px;
  }

  .roadmap-content {
    font-size: 14px;
    font-weight: 600;
    color: #2c3e50;
    line-height: 1.4;
  }

  /* Section 07 - Team */
  #sec07 {
    padding: 80px 20px;
  }

  .team-grid {
    grid-template-columns: 1fr;
    gap: 40px;
    justify-items: center;
  }

  .team-grid .team-member:first-child {
    grid-column: 1;
  }

  .member-name-role {
    font-size: 18px;
    padding: 10px 20px;
    border-radius: 25px;
  }

  .member-description {
    font-size: 13px;
  }

  /* Section 08 - Advisors */
  #sec08 {
    padding: 60px 0 60px;
  }

  .s08-title {
    font-size: 16px;
    line-height: 1.4;
    margin-bottom: 30px;
    text-align: center;
  }

  .professor-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
  }

  .list-item {
    padding-bottom: 16px;
  }

  /* Footer */
  footer {
    padding: 20px 0;
    background-color: #DEDBD8;
  }

  footer .container {
    text-align: center;
    font-size: 12px;
    padding-top: 24px;
  }

  .f-inner{flex-direction: column; align-items: first baseline; gap: 12px;}

  .f-social-list{gap: 4px;}
  
  .social-link {width: 36px; height: 36px; display: flex; align-items: center; justify-content: center;}
}

/* Accessibility improvements for touch devices */
@media (hover: none) and (pointer: coarse) {
  .mobile-menu-btn,
  .nav-close-btn {
    min-height: 48px;
    min-width: 48px;
  }
  
  .nav a {
    min-height: 48px;
    padding: 16px 20px;
  }
}

/* ========== Tablet Styles (768px - 1023px) ========== */
@media screen and (min-width: 768px) and (max-width: 1023px) {
  
  .container {
    max-width: 100%;
    padding-left: 24px;
    padding-right: 24px;
  }

  /* Header */
  .header {
    padding: 10px 16px;
    max-width: 800px;
  }
  html:lang(ko) .header{width: 80%;}

  .nav {
    gap: 12px;
    font-size: 12px;
  }

  .nav a {
    padding: 6px 10px;
  }

  .lang-dd {
    padding-left: 40px;
  }

  /* Section 01 */
  #sec01 {
    padding: 200px 0 120px;
  }

  .count-wrap {
    gap: 20px;
    justify-content: center;
  }

  .time-box {
    min-width: 220px;
    height: 220px;
  }

  .time-value {
    font-size: 64px;
  }

  .banner-title .sec01-title {
    font-size: 16px;
  }

  /* Section 03 - Technology */
  #sec03 {
    padding: 80px 20px;
  }

  .tech-split {
    height: 620px;
  }

  .tech-panel {
    padding: 40px 30px;
  }

  .tech-title-lg {
    font-size: 36px;
  }

  .panel-thumb.pt-1{top: -60px; left: -30px;}
  .panel-thumb.pt-2{right: -60px; bottom: -40px;}


  /* Section 04 - Service */
  #sec04 {
    padding: 80px 20px;
  }

  .svc-item {
    column-gap: 20px;
  }

  .svc-a {
    width: 100%;
  }

  .svc-title {
    font-size: 42px;
  }

  .svc-c {
    height: 130px;
  }

    .svc-c img.s-img-1 {
    width: 250px;
    left: -100px;
  }

  .svc-c img.s-img-2 {
    width: 320px;
    left: -170px;
  }

  .svc-c img.s-img-3 {
    width: 200px;
    top: 80px;
    left: -70px;
  }

  .svc-c img.s-img-4 {
    width: 200px;
    left: -70px;
  }

  /* Section 05 */
  #sec05 {
    padding: 120px 0;
  }

  .title-area {
    width: 80%;
    height: 720px;
  }

  .goal-wrap {
    padding: 60px 24px;
  }

  .title-area {
    width: 120%;
    height: 600px;
    background-size: 800px auto;
  }

  .frame-content {
    top: 40px;
    right: 40px;
    bottom: 40px;
    left: 40px;
  }

  /* Section 06 */
  #sec06 {
    padding: 80px;
  }

  .property-content {
    gap: 40px;
  }

  .property-title {
    font-size: 54px;
    position: relative;
    top: -110px;
  }

  .images-container {
    position: relative;
    top: -100px;
    right: 40px;
    height: 260px;
    min-width: 350px;
  }

  .main-image {
    width: 100%; 
    height: 100%;
    right: 0;
    bottom: -20px;
  }

  .small-image img {
    width: 100%; 
    position: absolute; 
    right: -40px; 
    bottom: 20px;
  }
  .small-image img{width: 100%;}

  .property-features {
    bottom: 60px;
  }

  /* Section 07 */
  .team-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 50px 60px;
  }

  .member-name-role {
    font-size: 20px;
  }
}

/* ========== Desktop Standard Styles (1024px - 1439px) ========== */
@media screen and (min-width: 1024px) and (max-width: 1439px) {
  .container {
    max-width: 1024px;
    padding-left: 24px;
    padding-right: 24px;
  }

  /* Header */
  .header {
    padding: 10px 16px;
  }

  /* Section 01 */
  .time-box {
    min-width: 240px;
    height: 240px;
  }

  .time-value {
    font-size: 72px;
  }

  .panel-thumb.pt-1{top: -60px; left: -40px;}
  .panel-thumb.pt-2{right: -60px; bottom: -60px;}

  /* 기타 주요 섹션들도 태블릿과 대형 데스크톱 사이의 적절한 값으로 설정 */
}

/* ========== Desktop Large Styles (1440px+) ========== */
@media screen and (min-width: 1440px) {
  
  .container {
    max-width: 1200px !important;
    padding-left: 24px;
    padding-right: 24px;
  }

  /* Section 01 */
  .time-box {
    min-width: 280px;
    height: 280px;
  }

  .time-value {
    font-size: 90px;
  }

  /* Section 03 */
  .tech-split {
    height: 580px;
  }

  .tech-panel {
    padding: 80px 50px;
  }

  /* Section 04 */
  .svc-item {
    column-gap: 120px;
  }

  .svc-a {
    height: 450px;
  }

  .svc-right {
    height: 450px;
  }

  /* Section 06 */
  .property-title {
    font-size: 72px;
  }

  .team-grid {
    gap: 80px 100px;
  }
}

/* ========== Specific Component Responsive Fixes ========== */

/* Language Dropdown Responsive */
@media screen and (max-width: 767px) {
  .lang-dd-menu {
    min-width: 160px;
    top: calc(100% + 12px);
    bottom: auto;
  }
}

/* Service Slider Navigation */
@media screen and (max-width: 767px) {
  .svc-btn {
    width: 36px;
    height: 36px;
  }
  
  .svc-btn .material-icons {
    font-size: 20px;
  }
}

/* Goal Dropdown Cards */
@media screen and (max-width: 767px) {
  .goal-dropdown-card {
    border-width: 2px;
    border-radius: 12px;
  }
  
  .goal-dropdown-header {
    padding: 14px 16px;
  }
  
  .goal-dropdown-icon {
    width: 20px;
    height: 20px;
  }
}

/* Tech Panel Animation Box */
@media screen and (max-width: 767px) {
  .box.expand {
    width: 150px !important;
  }
  html:lang(ko) .box.expand{width: 118px !important;}
}

/* Accessibility improvements for touch devices */
@media (hover: none) and (pointer: coarse) {
  .svc-btn,
  .more-btn,
  .goal-dropdown-header {
    min-height: 44px;
    min-width: 44px;
  }
  
  .nav a {
    min-height: 44px;
    display: flex;
    align-items: center;
  }
}

/* Print styles */
@media print {
  .header,
  .svc-cont,
  .goal-dropdown-icon {
    display: none;
  }
  
  body {
    font-size: 12pt;
    line-height: 1.4;
  }
  
  section {
    break-inside: avoid;
    page-break-inside: avoid;
  }
}


/* 전역 안전망 */
html, body { max-width:100%; overflow-x:hidden; }

/* 섹션06: 배경/내부 이미지가 살짝 넘쳐도 커팅 */
.title-area,
.main-image,
.architecture-diagram { overflow:hidden; }

/* 슬라이더 2중 안전장치 */
.svc-slider { overflow:hidden; }
.svc-track  { display:flex; }
.svc-item   { flex:0 0 100%; max-width:100%; }

/* 스크롤탑 버튼이 레이아웃에 영향 주지 않게 고정 크기 */
.scroll-top-btn { width:56px; height:56px; }


/* 부모가 트랙 밖으로 새는 걸 항상 막기 */
.svc-slider{ overflow: hidden; }
.svc-track{ display: flex; will-change: transform; }
.svc-item{ flex: 0 0 100%; max-width: 100%; }