/* ============================================
   EP Interaction Page – Styles
   ============================================ */

/* ---- Z-Index Scale ----
 * --z-base:      1    (hero, gallery-grid)
 * --z-content:   2    (gallery-section, hero-text)
 * --z-overlay-text: 5 (hero-text-overlay)
 * --z-panel-inner: 10 (service-panel-close)
 * --z-preview:   50   (project-img-preview)
 * --z-menu:      90   (menu-overlay)
 * --z-header:    100  (header, scroll-indicator)
 * --z-backdrop:  999  (service-panel-backdrop)
 * --z-panel:     1000 (service-panel)
 * --z-cursor:    10000(cursor-dot)
 */
:root {
  /* Z-Index Scale */
  --z-base: 1;
  --z-content: 2;
  --z-overlay-text: 5;
  --z-panel-inner: 10;
  --z-preview: 50;
  --z-menu: 90;
  --z-header: 100;
  --z-backdrop: 999;
  --z-panel: 1000;
  --z-cursor: 10000;

  /* Design Tokens */
  --heading-size: clamp(50px, 8vw, 110px);
  --section-padding-y: 120px;
  --section-padding-x: 50px;
  --border-light: rgba(0, 0, 0, 0.12);
  --border-dark: rgba(255, 255, 255, 0.15);
  --arrow-size: 40px;
  --color-bg-dark: #000;
  --color-bg-light: #f0ebe4;
  --color-text-dark: #1a1a1a;
  --color-text-light: #fff;
  --color-accent: rgba(255, 255, 255, 0.55);
}

*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: auto;
  overflow-x: hidden;
}

body {
  font-family: 'Inter', -apple-system, sans-serif;
  background: #000;
  color: #fff;
  overflow-x: hidden;
  cursor: none;
}

body.no-scroll {
  overflow: hidden;
  position: fixed;
  width: 100%;
  touch-action: none;
}

a {
  text-decoration: none;
  color: inherit;
  cursor: none;
}

button {
  cursor: none;
}

/* ============================================
   CUSTOM CURSOR
   ============================================ */
.cursor-dot {
  position: fixed;
  top: 0;
  left: 0;
  width: 9px;
  height: 9px;
  background: #fff;
  border-radius: 50%;
  pointer-events: none;
  z-index: var(--z-cursor);
  transform: translate(-50%, -50%);
  transition: width 0.3s ease, height 0.3s ease, background 0.3s ease, mix-blend-mode 0.3s ease;
  mix-blend-mode: difference;
}

.cursor-dot.is-larger {
  width: 50px;
  height: 50px;
  background: #fff;
  mix-blend-mode: difference;
}

.cursor-dot.is-title {
  width: 80px;
  height: 80px;
  background: #fff;
  mix-blend-mode: difference;
}

.cursor-dot.cursor-smaller {
  width: 8px;
  height: 8px;
}

/* ============================================
   HEADER
   ============================================ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 30px 50px;
  z-index: var(--z-header);
  mix-blend-mode: difference;
}

.logo {
  display: flex;
  align-items: center;
}

.logo .logo-img {
  height: 22px;
  width: auto;
}

/* GNB Navigation (PC) */
.gnb-nav {
  display: flex;
  align-items: center;
  gap: 40px;
}

.gnb-link {
  font-family: 'Inter', sans-serif;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: #fff;
  transition: opacity 0.3s ease;
  position: relative;
}

.gnb-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: #fff;
  transition: width 0.3s ease;
}

.gnb-link:hover::after {
  width: 100%;
}

.gnb-link:hover {
  opacity: 0.7;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 24px;
}

.menu-toggle {
  font-family: 'Inter', sans-serif;
  font-size: 16px;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: #fff;
  background: none;
  border: none;
  padding: 10px 0;
  transition: font-weight 0.5s ease;
}

.menu-toggle:hover {
  font-weight: 700;
}

/* ============================================
   MENU OVERLAY
   ============================================ */
.menu-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  height: 100dvh;
  background: #111;
  z-index: var(--z-menu);
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 50px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.5s ease;
  will-change: opacity;
}

.menu-overlay.active {
  opacity: 1;
  pointer-events: all;
}

.menu-nav {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-bottom: 80px;
}

.menu-link {
  font-size: clamp(40px, 6vw, 80px);
  font-weight: 300;
  color: #fff;
  transition: font-weight 0.5s ease, letter-spacing 0.5s ease;
  position: relative;
  display: inline-block;
}

.menu-link::before {
  content: attr(data-num) '. ';
  font-size: 14px;
  font-weight: 400;
  vertical-align: super;
  margin-right: 10px;
  opacity: 0.5;
}

.menu-link:hover {
  font-weight: 700;
  letter-spacing: 0.02em;
}

.menu-footer {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
}

.menu-footer a {
  font-size: 14px;
  font-weight: 400;
  color: rgba(255, 255, 255, 0.7);
  transition: color 0.3s ease;
}

.menu-footer a:hover {
  color: #fff;
}

.menu-social {
  display: flex;
  gap: 30px;
}

/* ============================================
   SECTIONS – THEME SWITCHING
   ============================================ */
.section {
  position: relative;
  min-height: 100vh;
  transition: background-color 0.0s, color 0.0s;
}

.section[data-theme="dark"] {
  background: #000;
  color: #fff;
}

.section[data-theme="light"] {
  background: #f0ebe4;
  color: #1a1a1a;
}

/* ============================================
   HERO + GALLERY WRAPPER (Sticky Scroll)
   ============================================ */
.hero-gallery-wrapper {
  position: relative;
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero-section {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  min-height: 100dvh;
  height: 100vh;
  height: 100dvh;
  padding: 0 50px;
  position: sticky;
  top: 0;
  z-index: var(--z-base);
  clip-path: inset(0);
}

.hero-text {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 100%;
  max-width: 1400px;
  padding: 0 50px;
  z-index: var(--z-content);
}

.hero-text-overlay {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  padding: 0 50px;
  z-index: var(--z-overlay-text);
  pointer-events: none;
  width: 100%;
  max-width: 1400px;
  mix-blend-mode: difference;
}

.hero-line {
  font-size: clamp(55px, 9vw, 130px);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.04em;
  will-change: transform;
}

/*
 * Start alignment: "i" in Serv[i]ce, [E]xperience, Des[i]gn
 * Measured Inter 800: "Serv"=2.312em, "Des"=1.897em
 * Padding offsets: line-2 += 2.39em, line-3 += 0.43em
 * All three "i/E/i" characters share the same x-position at rest
 * Scroll animation moves from i/E/i alignment → S/E/D alignment
 */
.line-1 {
  padding-left: 22vw;
}

.line-2 {
  padding-left: calc(22vw + 2.39em);
}

.line-3 {
  padding-left: calc(22vw + 0.43em);
}

/* Asterisk – n자 옆, 동일 높이, 360도 무한 회전 */
.spinning-star {
  display: inline-block;
  font-size: 0.72em;
  font-weight: 800;
  line-height: 1;
  position: relative;
  vertical-align: 0.28em;
  margin-left: 0.25em;
  animation: spinStar 3s linear infinite;
  transform-origin: center center;
}

@keyframes spinStar {
  0%   { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* Light theme text – white text + mix-blend-mode: difference
   On light bg (#f0ebe4): white - light = dark → text appears dark
   On dark images: white - dark = light → text appears light */
.gallery-section .hero-line {
  color: #fff;
}

.scroll-indicator {
  position: fixed;
  bottom: 40px;
  right: 50px;
  display: flex;
  align-items: center;
  gap: 15px;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.15em;
  color: #fff;
  z-index: var(--z-header);
}

.scroll-arrow {
  width: 50px;
  height: 50px;
  border: 1px solid currentColor;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: bounceDown 2s ease infinite;
  flex-shrink: 0;
}

.scroll-arrow svg {
  transition: transform 0.4s ease;
}

.scroll-indicator.is-overview .scroll-arrow {
  animation: none;
}

.scroll-indicator-text {
  transition: opacity 0.3s ease;
}

/* Color switch for dark background – instant, no transition */
.light-scroll {
  color: #fff;
  transition: opacity 0.3s ease;
}

.scroll-indicator.light-scroll.is-light {
  color: #1a1a1a;
}

@keyframes bounceDown {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(5px); }
}

/* ============================================
   GALLERY SECTION (Parallax Images)
   ============================================ */
.gallery-section {
  min-height: 300vh;
  position: relative;
  z-index: var(--z-content);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  clip-path: inset(0);
}

.gallery-grid {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: var(--z-base);
}

.gallery-item {
  position: absolute;
  overflow: hidden;
  border-radius: 8px;
  will-change: transform;
  transition: transform 0.15s ease-out, box-shadow 0.4s ease;
}

.gallery-item:hover {
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.2);
}

.gallery-item:hover img {
  transform: scale(1.04);
}

.gallery-item img {
  transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/*
 * Clean Golden Ratio Layout – 5 images, no overlap
 * ─────────────────────────────────────────────
 * Each image occupies its own zone
 * Diagonal flow: ↘ upper-left → lower-right
 *
 *   ┌──────────────────────────────────────────┐
 *   │ ┌────────────┐                           │
 *   │ │   #1 (XL)  │                           │
 *   │ │   anchor   │                ┌─────┐    │
 *   │ └────────────┘  [Service]     │ #2  │    │
 *   │                               │     │    │
 *   │              [Experience]     └─────┘    │
 *   │                                          │
 *   │ ┌──────┐     [Design*]                   │
 *   │ │  #5  │                                 │
 *   │ │      │         ┌────────────────┐      │
 *   │ └──────┘         │    #4 (XL)     │      │
 *   │                  └────────────────┘      │
 *   │                                   ┌────┐ │
 *   │                                   │ #7 │ │
 *   └───────────────────────────────────└────┘─┘
 */

/*
 * Gallery Layout – 12 images, organic diagonal flow
 * ─────────────────────────────────────────────
 * Inspired by Awwwards best practices:
 * - 1 large (35%+) + 2-3 medium (25-30%) + small (18-20%) per zone
 * - No clipping: all items within safe bounds (min 2% from edges)
 * - Diagonal flow ↘ with left/right alternation
 * - Generous spacing between zones (~15-18% vertical gap)
 */

/* === Zone 1: 상단 (0% ~ 15%) === */

/* #1 – 좌상단 대형 (UIUX Consulting – hero anchor) */
.item-1 {
  width: 35%;
  aspect-ratio: 4 / 3;
  top: 2%;
  left: 3%;
  border-radius: 12px;
}

/* #2 – 우측 중형 (Startup Accelerating) */
.item-2 {
  width: 28%;
  aspect-ratio: 16 / 10;
  top: 5%;
  right: 5%;
  border-radius: 10px;
}

/* === Zone 2: 중상단 (18% ~ 32%) === */

/* #3 – 중앙 우측 대형 (STYLETECH – biggest visual) */
.item-3 {
  width: 38%;
  aspect-ratio: 4 / 3;
  top: 20%;
  right: 8%;
  border-radius: 12px;
}

/* #4 – 좌측 중형 (Brand & Commerce) */
.item-4 {
  width: 26%;
  aspect-ratio: 3 / 4;
  top: 22%;
  left: 6%;
  border-radius: 10px;
}

/* === Zone 3: 중단 (36% ~ 50%) === */

/* #5 – 좌측 대형 세로 (Idol Official Lightstick) */
.item-5 {
  width: 24%;
  aspect-ratio: 3 / 4;
  top: 38%;
  left: 5%;
  border-radius: 10px;
}

/* #6 – 중앙 중형 가로 (LLOYD) */
.item-6 {
  width: 30%;
  aspect-ratio: 16 / 10;
  top: 42%;
  left: 38%;
  border-radius: 10px;
  background: #1a1a1a;
}

/* #7 – 우측 소형 세로 (TURN BAG) */
.item-7 {
  width: 18%;
  aspect-ratio: 2 / 3;
  top: 39%;
  right: 4%;
  border-radius: 8px;
}

/* === Zone 4: 중하단 (54% ~ 68%) === */

/* #8 – 중앙~좌측 대형 가로 (HD HYUNDAI DEVELON) */
.item-8 {
  width: 42%;
  aspect-ratio: 16 / 9;
  top: 56%;
  left: 10%;
  background: #f5f5f5;
  border-radius: 12px;
}

/* #9 – 우측 중형 세로 (Digital Donation) */
.item-9 {
  width: 22%;
  aspect-ratio: 3 / 4;
  top: 56%;
  right: 8%;
  border-radius: 10px;
}

/* === Zone 5: 하단 (72% ~ 90%) === */

/* #10 – 좌측 중형 정방형 (LOONA Fanclub) */
.item-10 {
  width: 22%;
  aspect-ratio: 1 / 1;
  top: 74%;
  left: 10%;
  border-radius: 10px;
}

/* #11 – 우측 대형 가로 (LG Display) */
.item-11 {
  width: 32%;
  aspect-ratio: 4 / 3;
  top: 75%;
  right: 5%;
  border-radius: 12px;
}

/* #12 – 중앙 하단 중형 가로 (101EXPERIENCE) */
.item-12 {
  width: 28%;
  aspect-ratio: 16 / 10;
  top: 88%;
  left: 35%;
  border-radius: 10px;
}

/* #13 – 좌측 하단 중형 가로 (DESIGN LIVING LAB) */
.item-13 {
  width: 24%;
  aspect-ratio: 16 / 10;
  top: 90%;
  left: 5%;
  border-radius: 10px;
  text-decoration: none;
}

/* 갤러리 아이템 라벨 (이미지 중앙 흰색 텍스트) */
.gallery-item-label {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: #ffffff;
  font-size: 1.2vw;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  z-index: 2;
  pointer-events: none;
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.6);
  white-space: nowrap;
}

/* ============================================
   MISSION SECTION
   ============================================ */
.mission-section {
  display: flex;
  align-items: center;
  padding: var(--section-padding-y) var(--section-padding-x);
  min-height: 100vh;
}

.mission-content {
  max-width: 1400px;
  width: 100%;
  margin: 0 auto;
}

.mission-subtitle {
  font-size: 18px;
  font-weight: 400;
  line-height: 1.6;
  max-width: 400px;
  margin-bottom: 40px;
  opacity: 0.75;
}

/* Mission List – 프로젝트 row 스타일 */
.mission-list {
  margin-bottom: 60px;
}

.mission-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 30px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  position: relative;
  transition: padding-left 0.4s ease;
  text-decoration: none;
  color: inherit;
}

.mission-row:last-child {
  border-bottom: 1px solid rgba(255, 255, 255, 0.15);
}

.mission-row:hover {
  padding-left: 20px;
}

.mission-text-group {
  flex: 1;
}

.mission-line {
  font-size: var(--heading-size);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.04em;
  opacity: 0;
  transform: translateY(60px);
  transition: opacity 0.8s ease, transform 0.8s ease, font-weight 0.5s ease;
}

.mission-line.visible {
  opacity: 1;
  transform: translateY(0);
}

.mission-line.accent {
  color: rgba(255, 255, 255, 0.55);
  transition: color 0.4s ease, opacity 0.8s ease, transform 0.8s ease;
}

.mission-row:hover .mission-line.accent {
  color: rgba(255, 255, 255, 0.85);
}

/* Mission row 순차 등장 */
.mission-row:nth-child(1) .mission-line:nth-child(1) { transition-delay: 0s; }
.mission-row:nth-child(1) .mission-line:nth-child(2) { transition-delay: 0.1s; }
.mission-row:nth-child(2) .mission-line:nth-child(1) { transition-delay: 0.2s; }
.mission-row:nth-child(2) .mission-line:nth-child(2) { transition-delay: 0.3s; }
.mission-row:nth-child(3) .mission-line:nth-child(1) { transition-delay: 0.4s; }
.mission-row:nth-child(3) .mission-line:nth-child(2) { transition-delay: 0.5s; }

/* Mission row CTA link */
.mission-cta-link {
  display: flex;
  align-items: center;
  gap: 15px;
  flex-shrink: 0;
  opacity: 0;
  transform: translateX(-10px);
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.mission-cta-text {
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.15em;
  color: #fff;
}

.mission-cta-arrow {
  width: var(--arrow-size);
  height: var(--arrow-size);
  border: 1.5px solid rgba(255, 255, 255, 0.45);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  transition: border-color 0.3s ease;
}

.mission-row:hover .mission-cta-link {
  opacity: 1;
  transform: translateX(0);
}

.mission-row:hover .mission-cta-arrow {
  border-color: rgba(255, 255, 255, 0.8);
}

.mission-row {
  cursor: pointer;
}

/* ============================================
   SERVICE DETAIL PANEL
   ============================================ */
.service-panel {
  position: fixed;
  top: 0;
  right: 0;
  width: 500px;
  height: 100vh;
  height: 100dvh;
  background: #111;
  z-index: var(--z-panel);
  transform: translateX(100%);
  transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
  overflow-y: auto;
  border-left: 1px solid rgba(255, 255, 255, 0.08);
  will-change: transform;
  -webkit-overflow-scrolling: touch;
}

.service-panel.is-open {
  transform: translateX(0);
}

.service-panel-close {
  position: absolute;
  top: 30px;
  right: 30px;
  background: none;
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  color: #fff;
  cursor: pointer;
  width: 60px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
  z-index: var(--z-panel-inner);
}

.service-panel-close svg {
  width: 18px;
  height: 18px;
}

.service-panel-close:hover {
  border-color: rgba(255, 255, 255, 0.6);
  background: rgba(255, 255, 255, 0.05);
}


.service-panel-inner {
  padding: 100px 40px 60px;
}

/* Service detail blocks */
.service-detail {
  display: none;
}

.service-detail.is-active {
  display: block;
  animation: panelFadeIn 0.4s ease 0.2s both;
}

@keyframes panelFadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.service-label {
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.15em;
  color: rgba(255, 255, 255, 0.6);
  display: block;
  margin-bottom: 20px;
}

.service-detail-title {
  font-size: clamp(36px, 5vw, 52px);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
  color: #fff;
  margin-bottom: 30px;
}

.service-detail-desc {
  font-size: 16px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 35px;
  word-break: keep-all;
}

.service-detail-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 50px;
}

.service-detail-tags span {
  padding: 8px 18px;
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 30px;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.05em;
  color: rgba(255, 255, 255, 0.8);
  transition: all 0.3s ease;
}

.service-detail-tags span:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.4);
  color: #fff;
}

/* Featured projects */
.service-projects-label {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.15em;
  color: rgba(255, 255, 255, 0.6);
  text-transform: uppercase;
  margin-bottom: 20px;
}

.service-project-cards {
  display: flex;
  gap: 16px;
  margin-bottom: 50px;
}

.service-project-card {
  flex: 1;
  text-decoration: none;
  color: #fff;
}

.service-project-img {
  width: 100%;
  aspect-ratio: 4 / 3;
  border-radius: 8px;
  overflow: hidden;
  margin-bottom: 10px;
}

.service-project-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.service-project-card:hover .service-project-img img {
  transform: scale(1.05);
}

.service-project-name {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.03em;
}

/* CTA link in panel */
.service-detail-cta {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.12em;
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  padding-top: 30px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  width: 100%;
  transition: color 0.3s ease;
}

.service-detail-cta:hover {
  color: #fff;
}

/* Panel backdrop */
.service-panel-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  z-index: var(--z-backdrop);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s ease;
}

.service-panel-backdrop.is-visible {
  opacity: 1;
  pointer-events: auto;
}


/* ============================================
   LOG SECTION – Horizontal Scroll
   ============================================ */
.log-section {
  min-height: auto;
  padding: var(--section-padding-y) 0;
  overflow: hidden;
  background: #f0ebe4;
  color: #1a1a1a;
}

.log-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  padding: 0 50px;
  margin-bottom: 60px;
}

.log-title {
  font-size: var(--heading-size);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1;
}

.log-header .cta-link {
  margin-top: 0;
  margin-bottom: 8px;
  color: #1a1a1a;
}

.log-header .cta-arrow {
  border-color: #1a1a1a;
}

.log-header .cta-arrow svg {
  stroke: #1a1a1a;
}

/* Horizontal track – native scroll */
.log-track-wrapper {
  overflow-x: auto;
  overflow-y: hidden;
  padding: 0 50px;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.log-track-wrapper::-webkit-scrollbar {
  display: none;
}

.log-track {
  display: flex;
  gap: 30px;
  width: max-content;
  padding-right: 50px;
}

/* Cards */
.log-card {
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: #1a1a1a;
  transition: opacity 0.3s ease;
}

.log-card:hover {
  opacity: 0.85;
}

.log-card-img {
  overflow: hidden;
  border-radius: 10px;
  position: relative;
  margin-bottom: 16px;
}

.log-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.5s ease;
}

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

/* 다양한 비율 */
.log-vertical {
  width: 280px;
  height: 380px;
}

.log-landscape {
  width: 420px;
  height: 280px;
}

.log-square {
  width: 300px;
  height: 300px;
}

.log-landscape-wide {
  width: 480px;
  height: 270px;
}

/* Badge (VIDEO / AWARD) */
.log-badge {
  position: absolute;
  top: 16px;
  left: 16px;
  background: rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: #fff;
}

/* Card info */
.log-card-info {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.log-card-title {
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.02em;
}

.log-card-date {
  font-size: 13px;
  font-weight: 400;
  color: rgba(26, 26, 26, 0.6);
}

/* Custom scrollbar */
.log-scrollbar {
  margin: 40px 50px 0;
  height: 2px;
  background: rgba(26, 26, 26, 0.1);
  border-radius: 1px;
  position: relative;
}

.log-scrollbar-thumb {
  height: 100%;
  width: 20%;
  background: rgba(26, 26, 26, 0.35);
  border-radius: 1px;
  transition: width 0.3s ease;
}

/* CTA Link */
.cta-link {
  display: inline-flex;
  align-items: center;
  gap: 15px;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.15em;
  margin-top: 50px;
  color: #fff;
  transition: gap 0.3s ease;
}

.cta-link:hover {
  gap: 25px;
  color: #fff;
}

.dark-cta {
  color: #1a1a1a;
}

.dark-cta:hover {
  color: #1a1a1a;
}

.cta-arrow {
  width: 45px;
  height: 45px;
  border: 1px solid rgba(255, 255, 255, 0.4);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color 0.3s ease, transform 0.3s ease;
}

.cta-link:hover .cta-arrow {
  border-color: #fff;
  transform: translateX(5px);
}

.dark-arrow {
  border-color: rgba(0, 0, 0, 0.3);
}

.dark-cta:hover .dark-arrow {
  border-color: #1a1a1a;
}

/* ============================================
   PROJECTS SECTION
   ============================================ */
.projects-section {
  padding: 120px 50px 120px;
  background: #f0ebe4;
  color: #1a1a1a;
  min-height: auto;
}

.projects-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 40px;
  margin-bottom: 80px;
  max-width: 1400px;
  margin-left: auto;
  margin-right: auto;
}

.projects-heading-1,
.projects-heading-2 {
  font-size: var(--heading-size);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1;
}

.projects-heading-2 {
  color: rgba(26, 26, 26, 0.4);
}

.projects-desc {
  font-size: 16px;
  font-weight: 400;
  line-height: 1.6;
  max-width: 350px;
  color: rgba(26, 26, 26, 0.6);
  word-break: keep-all;
}

/* Projects List */
.projects-list {
  max-width: 1400px;
  margin: 0 auto;
}

.project-row {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 28px 0;
  border-top: 1px solid rgba(0, 0, 0, 0.12);
  position: relative;
  transition: padding-left 0.4s ease;
  text-decoration: none;
  color: #1a1a1a;
}

.project-row:last-child {
  border-bottom: 1px solid rgba(0, 0, 0, 0.12);
}

.project-info {
  flex: 1;
  display: flex;
  align-items: baseline;
  gap: 16px;
}

.project-name {
  font-size: clamp(20px, 2.5vw, 32px);
  font-weight: 500;
  letter-spacing: 0.02em;
  transition: font-weight 0.5s ease;
}

.project-cat {
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: rgba(26, 26, 26, 0.4);
  opacity: 0;
  transform: translateY(5px);
  transition: opacity 0.4s ease, transform 0.4s ease;
}

.project-year {
  font-size: 13px;
  font-weight: 400;
  color: rgba(26, 26, 26, 0.4);
  letter-spacing: 0.05em;
  flex-shrink: 0;
}

.project-row:hover .project-cat {
  opacity: 1;
  transform: translateY(0);
}

.project-row:hover .project-name {
  font-weight: 700;
}

.project-row:hover {
  padding-left: 20px;
}

.project-arrow {
  width: var(--arrow-size);
  height: var(--arrow-size);
  border: 1px solid var(--border-light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: transform 0.3s ease, border-color 0.3s ease;
}

.project-row:hover .project-arrow {
  transform: translateX(5px);
  border-color: #1a1a1a;
}

/* Project image preview on hover */
.project-img-preview {
  display: none;
}

/* ============================================
   CONTACT SECTION
   ============================================ */
.contact-section {
  min-height: auto;
  padding: var(--section-padding-y) var(--section-padding-x);
  position: relative;
  overflow: hidden;
}

.contact-content {
  max-width: 1400px;
  margin: 0 auto;
}

.contact-header {
  margin-bottom: 80px;
}

.contact-label {
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.15em;
  color: rgba(255, 255, 255, 0.6);
  text-transform: uppercase;
  margin-bottom: 20px;
}

.contact-heading {
  font-size: var(--heading-size);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1.1;
}

.contact-body {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  margin-bottom: 80px;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 30px;
}

.contact-info-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.contact-info-label {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.15em;
  color: rgba(255, 255, 255, 0.5);
  text-transform: uppercase;
}

.contact-info-value {
  font-size: 18px;
  font-weight: 400;
  color: #fff;
  transition: opacity 0.3s ease;
}

a.contact-info-value:hover {
  opacity: 0.7;
}

.contact-social {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.contact-social-links {
  display: flex;
  gap: 30px;
}

.contact-social-links a {
  font-size: 16px;
  font-weight: 400;
  color: rgba(255, 255, 255, 0.7);
  position: relative;
  transition: color 0.3s ease;
}

.contact-social-links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1px;
  background: #fff;
  transition: width 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.contact-social-links a:hover {
  color: #fff;
}

.contact-social-links a:hover::after {
  width: 100%;
}

.contact-cta {
  display: inline-flex;
  align-items: center;
  gap: 20px;
  font-size: 16px;
  font-weight: 500;
  letter-spacing: 0.12em;
  color: #fff;
  text-decoration: none;
  padding: 20px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  width: 100%;
  transition: gap 0.3s ease;
}

.contact-cta:hover {
  gap: 30px;
}

.contact-cta .cta-arrow {
  border-color: rgba(255, 255, 255, 0.4);
}

.contact-cta:hover .cta-arrow {
  border-color: #fff;
  transform: translateX(5px);
}

/* ============================================
   FOOTER
   ============================================ */
.footer-section {
  min-height: auto;
  padding: 80px var(--section-padding-x) 40px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-main {
  max-width: 1400px;
  margin: 0 auto 40px;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 60px;
}

.footer-cta {
  margin: 0;
}

.footer-logo-img {
  height: 20px;
  width: auto;
  margin-bottom: 12px;
  display: block;
}

.footer-desc {
  font-size: 13px;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.5);
}

.footer-nav {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 15px;
  padding-top: 20px;
}

.footer-link {
  font-size: 18px;
  font-weight: 500;
  letter-spacing: 0.05em;
  position: relative;
  transition: letter-spacing 0.4s ease;
}

.footer-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1px;
  background: #fff;
  transition: width 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.footer-link:hover {
  letter-spacing: 0.12em;
}

.footer-link:hover::after {
  width: 100%;
}

.footer-bottom {
  max-width: 1400px;
  margin: 0 auto;
  padding-top: 30px;
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  display: flex;
  justify-content: space-between;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.6);
}

/* ============================================
   FOCUS-VISIBLE (Keyboard Accessibility)
   ============================================ */
a:focus-visible,
button:focus-visible {
  outline: 2px solid #fff;
  outline-offset: 3px;
  border-radius: 3px;
}

.section[data-theme="light"] a:focus-visible,
.section[data-theme="light"] button:focus-visible,
.log-section a:focus-visible {
  outline-color: #1a1a1a;
}

.menu-link:focus-visible {
  outline-color: #fff;
  outline-offset: 6px;
}

.service-panel a:focus-visible,
.service-panel button:focus-visible {
  outline-color: #fff;
}

.service-detail-tags span:focus-visible {
  outline: 2px solid #fff;
  outline-offset: 2px;
}

/* ============================================
   LANGUAGE TOGGLE
   ============================================ */
.lang-toggle {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: none;
  border: none;
  cursor: pointer;
  font-family: 'Inter', sans-serif;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.1em;
  padding: 0;
}

.lang-option {
  color: rgba(255, 255, 255, 0.35);
  transition: color 0.3s ease;
}

.lang-option.is-active {
  color: #fff;
  font-weight: 600;
}

.lang-divider {
  color: rgba(255, 255, 255, 0.2);
  font-weight: 300;
}

/* ============================================
   IMAGE LOADING UX (Fade-in on load)
   ============================================ */
.gallery-item img,
.log-card-img img,
.service-project-img img {
  opacity: 0;
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.gallery-item img.is-loaded,
.log-card-img img.is-loaded,
.service-project-img img.is-loaded {
  opacity: 1;
}

/* Skeleton placeholder before image loads */
.gallery-item,
.log-card-img,
.service-project-img {
  background: linear-gradient(
    110deg,
    rgba(128, 128, 128, 0.08) 8%,
    rgba(128, 128, 128, 0.15) 18%,
    rgba(128, 128, 128, 0.08) 33%
  );
  background-size: 200% 100%;
  animation: skeletonShimmer 1.5s linear infinite;
}

/* :has() for modern browsers */
.gallery-item:has(img.is-loaded),
.log-card-img:has(img.is-loaded),
.service-project-img:has(img.is-loaded) {
  animation: none;
  background: none;
}

/* Fallback class for browsers without :has() support */
.gallery-item.img-loaded,
.log-card-img.img-loaded,
.service-project-img.img-loaded {
  animation: none;
  background: none;
}

@keyframes skeletonShimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 768px) {
  .header {
    padding: 20px 25px;
  }

  .hero-section {
    padding: 0 20px;
  }

  .mission-section {
    padding: 50px 20px;
    min-height: auto;
  }

  .gallery-section {
    min-height: 250vh;
  }

  .projects-section {
    padding: 50px 20px;
  }

  .projects-header {
    grid-template-columns: 1fr;
  }

  .projects-heading-2 {
    text-align: left;
  }

  .footer-section {
    padding: 40px 20px 30px;
  }

  .footer-nav {
    flex-direction: column;
    gap: 15px;
  }

  .scroll-indicator {
    right: 20px;
    align-items: flex-end;
  }

  .scroll-indicator-text {
    text-align: right;
    line-height: 1.5;
  }

  /* Hero text: mobile – 밀도 높은 볼드 타이포 */
  .hero-text,
  .hero-text-overlay {
    padding: 0 20px;
    text-align: left;
    top: 40%;
  }

  .hero-line {
    font-size: clamp(42px, 12vw, 56px);
    font-weight: 900;
    line-height: 1.25;
    white-space: nowrap;
    will-change: transform, opacity;
  }

  .line-1 { padding-left: 0; }
  .line-2 { padding-left: 0; }
  .line-3 { padding-left: 0; }

  /*
   * Mobile Gallery: 5 images, 3-tier staggered layout
   * ─────────────────────────────────────────────
   * Best practice (Jomor Design / Jordan Gilroy pattern):
   *   Tier 1 (0-25%):  1 large anchor image (70% width)
   *   Tier 2 (28-50%): 2 medium images, left-right stagger (48-52%)
   *   Tier 3 (55-80%): 2 smaller images, right-left stagger (38-42%)
   *   Vertical gaps ~12-15% between tiers for breathing room
   */
  .gallery-grid .gallery-item {
    width: auto;
  }

  .gallery-grid .item-12,
  .gallery-grid .item-13 {
    display: none;
  }

  /* ================================================================
   * Mobile Gallery: Editorial 2-column masonry
   * ─────────────────────────────────────────────
   * 규칙: tier 간 5-8% 호흡, 한 시야에 최대 2장
   *
   * Tier A (0-18%):  STYLETECH(L, anchor) + UIUX(R, square)
   * Tier B (22-42%): Brand&Commerce(L, sq) + Lightstick(R, anchor)
   * Tier C (40-58%): DREAMPLUS(L, 3:4)    + Startup(R, 3:4)
   * Tier D (58-74%): TURN BAG(L, 3:4)     + LLOYD(R, 1:1)
   * Tier E (76-92%): 101PACKERS(L, 1:1)   + DEVELON(R, 3:4)
   * Tier F (90+):    LG Display(L, 3:4)
   * ================================================================ */

  @keyframes swayLeft {
    0%, 100% { transform: translateX(0); }
    50% { transform: translateX(-8px); }
  }
  @keyframes swayRight {
    0%, 100% { transform: translateX(0); }
    50% { transform: translateX(8px); }
  }

  /* ── Tier A: 히어로 존 ── */

  /* item-3: STYLETECH — 좌측 앵커, 넘침 */
  .gallery-grid .item-3 {
    display: block;
    width: 55%;
    top: 0%;
    left: -4%;
    right: auto;
    aspect-ratio: 3 / 4;
    border-radius: 6px;
    animation: swayLeft 6s ease-in-out infinite;
  }

  /* item-1: UIUX Consulting — 우측 정사각 */
  .gallery-grid .item-1 {
    width: 42%;
    top: 6%;
    right: 1%;
    left: auto;
    aspect-ratio: 1 / 1;
    border-radius: 6px;
  }

  /* ── Tier B: 서브 히어로 (tier A와 5% 간격) ── */

  /* item-4: Brand & Commerce — 좌측 정사각 */
  .gallery-grid .item-4 {
    width: 42%;
    top: 23%;
    left: 1%;
    right: auto;
    aspect-ratio: 1 / 1;
    border-radius: 6px;
  }

  /* item-5: Lightstick — 우측 앵커, 넘침 */
  .gallery-grid .item-5 {
    display: block;
    width: 55%;
    top: 25%;
    right: -4%;
    left: auto;
    aspect-ratio: 3 / 4;
    border-radius: 6px;
    animation: swayRight 7s ease-in-out infinite;
  }

  /* ── Tier C: 중간 좌우 교차 ── */

  /* item-10: DREAMPLUS — 좌측 세로형 */
  .gallery-grid .item-10 {
    display: block;
    width: 48%;
    top: 40%;
    left: 1%;
    right: auto;
    aspect-ratio: 3 / 4;
    border-radius: 6px;
  }

  /* item-2: Startup Accelerating — 우측 세로형 */
  .gallery-grid .item-2 {
    display: block;
    width: 48%;
    top: 46%;
    right: 1%;
    left: auto;
    aspect-ratio: 3 / 4;
    border-radius: 6px;
  }

  /* ── Tier D: 리듬 전환 ── */

  /* item-7: TURN BAG — 좌측 세로형 */
  .gallery-grid .item-7 {
    display: block;
    width: 48%;
    top: 58%;
    left: 1%;
    right: auto;
    aspect-ratio: 3 / 4;
    border-radius: 6px;
  }

  /* item-6: LLOYD — 우측 정사각 */
  .gallery-grid .item-6 {
    display: block;
    width: 42%;
    top: 65%;
    right: 1%;
    left: auto;
    aspect-ratio: 1 / 1;
    border-radius: 6px;
  }

  /* ── Tier E: 클로징 존 ── */

  /* item-9: 101PACKERS — 좌측 정사각 */
  .gallery-grid .item-9 {
    display: block;
    width: 42%;
    top: 76%;
    left: 1%;
    right: auto;
    aspect-ratio: 1 / 1;
    border-radius: 6px;
  }

  /* item-8: DEVELON — 우측 세로형 */
  .gallery-grid .item-8 {
    display: block;
    width: 48%;
    top: 80%;
    right: 1%;
    left: auto;
    aspect-ratio: 3 / 4;
    border-radius: 6px;
  }

  /* ── Tier F: 마무리 ── */
  /* item-11: LG Display — 좌측 세로형 */
  .gallery-grid .item-11 {
    display: block;
    width: 48%;
    top: 90%;
    left: 1%;
    right: auto;
    aspect-ratio: 3 / 4;
    border-radius: 6px;
  }

  /* Service panel: full-screen overlay on mobile */
  .service-panel {
    width: 100%;
    left: 0;
    right: 0;
    border-left: none;
    transform: translateY(100%);
    transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
    overscroll-behavior: contain;
    touch-action: pan-y;
    -webkit-overflow-scrolling: touch;
  }

  .service-panel.is-open {
    transform: translateY(0);
  }

  /* Hide backdrop on mobile – panel covers full screen */
  .service-panel-backdrop {
    display: none;
  }

  .service-panel-inner {
    padding: 80px 25px 40px;
  }

  .service-panel-close {
    position: sticky;
    top: 20px;
    right: 20px;
    width: 44px;
    height: 44px;
    margin-left: auto;
    margin-right: 0;
    z-index: calc(var(--z-panel) + 1);
  }

  .service-project-cards {
    flex-direction: column;
  }

  /* Log section: mobile touch-friendly */
  .log-track-wrapper {
    padding: 0 25px;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
  }

  .log-card {
    scroll-snap-align: start;
  }

  .log-header {
    padding: 0 25px;
  }

  .log-scrollbar {
    margin: 30px 25px 0;
  }

  /* Mission CTA: hide OVERVIEW text on mobile, show arrow only */
  .mission-cta-link {
    opacity: 1;
    transform: translateX(0);
  }

  .mission-cta-arrow {
    width: 40px;
    height: 40px;
  }

  .mission-cta-text {
    display: none;
  }

  /* Projects: mobile */
  .projects-section {
    padding: 50px 20px;
  }

  .projects-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 30px;
  }

  .project-row {
    padding: 16px 0;
    gap: 12px;
  }

  .project-year {
    display: none;
  }

  .project-cat {
    display: none;
  }

  .project-name {
    font-size: clamp(16px, 4.5vw, 24px);
  }

  /* Contact: mobile */
  .contact-section {
    padding: 50px 20px;
  }

  .contact-body {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .contact-heading {
    font-size: clamp(32px, 8vw, 50px);
  }

  /* Footer: single column on mobile */
  .footer-main {
    flex-direction: column;
    gap: 30px;
  }

  .footer-section {
    padding: 40px 20px 30px;
  }

  .footer-nav {
    align-items: flex-start;
  }

  .cursor-dot {
    display: none;
  }

  body {
    cursor: auto;
  }

  a, button {
    cursor: pointer;
  }
}

/* ============================================
   PHASE 3: TREND ENHANCEMENTS (2025-2026)
   ============================================ */

/* #14 — Mesh gradient ambient glow on Contact section */
.contact-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background:
    radial-gradient(ellipse 60% 50% at 15% 20%, rgba(60, 80, 120, 0.12) 0%, transparent 70%),
    radial-gradient(ellipse 50% 60% at 85% 80%, rgba(100, 60, 90, 0.08) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

.contact-content {
  position: relative;
  z-index: 1;
}

/* #13 — Mission text reveal uses existing opacity+translateY (no clip-path conflict) */

/* #12 — Magnetic button effect (CTA arrows) */
.mission-cta-arrow,
.project-arrow,
.contact-cta-arrow,
.scroll-arrow {
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.3s ease;
}

/* #15 — Reduced motion accessibility */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .gallery-item {
    transition: none;
  }

  .hero-line {
    transform: none !important;
  }

  .mission-line {
    clip-path: none;
    opacity: 1;
    transform: none;
  }
}