/**
 * ADONG HOMEPAGE - LAYOUT SYSTEM
 * CSS Grid/Flexbox 하이브리드 레이아웃
 * Mobile-First 황금비율 기반 반응형 설계
 */

/* ==========================================
 * HEADER & NAVIGATION LAYOUT
 * ========================================== */

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border-light);
  z-index: var(--z-fixed);
  transition: all var(--transition-fast);
}

.nav {
  padding: var(--space-small) 0;
}

.nav-container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--space-medium);
}

.nav-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: var(--space-medium);
}

.nav-brand {
  flex-shrink: 0;
  font-family: 'Space Grotesk', 'Pretendard GOV', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  font-size: clamp(18px, 19px, 20px);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  text-decoration: none;
}


/* Language Toggle */
.language-toggle {
  display: flex;
  background: var(--color-bg-secondary);
  border-radius: var(--radius-full);
  padding: 4px;
  gap: 2px;
}

.lang-btn {
  padding: 6px 12px;
  border: none;
  background: transparent;
  border-radius: var(--radius-full);
  font-size: 14px;
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
  min-width: 36px;
}

.lang-btn.active {
  background: var(--color-primary);
  color: var(--color-white);
}

.lang-btn:hover:not(.active) {
  color: var(--color-text-primary);
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-micro);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.mobile-menu-toggle span {
  width: 24px;
  height: 2px;
  background: var(--color-text-primary);
  transition: all var(--transition-fast);
  margin: 2px 0;
}

.mobile-menu-toggle:hover {
  background: var(--color-bg-secondary);
}

/* Mobile responsive adjustments */
@media (max-width: 767px) {
  .nav-right {
    gap: var(--space-small);
  }

  .language-toggle {
    padding: 0.1875rem;
  }

  .lang-btn {
    padding: 0.25rem 0.5rem;
    font-size: 0.8125rem;
    min-width: 1.875rem;
  }
}

@media (min-width: 768px) {
  .mobile-menu-toggle {
    display: none;
  }
}

/* ==========================================
 * MAIN CONTENT LAYOUT (fullPage.js)
 * ========================================== */

.main {
  padding-top: 0; /* Remove header padding for fullPage.js */
}

/* fullPage.js Section Base */
.section {
  height: 100vh !important;
  max-height: 100vh !important;
  display: flex !important;
  align-items: center !important;
  justify-content: center !important;
  padding: var(--space-medium) 0 !important;
  overflow: hidden !important;
  box-sizing: border-box !important;
}

/* Footer section - 화면의 1/3 높이 */
.footer-section {
  height: 33.33vh !important;
  min-height: 33.33vh !important;
  max-height: 33.33vh !important;
}

/* fullPage.js watermark styling - keep text, remove background */
.fp-watermark,
[data-fp-watermark] {
  background: none !important;
  background-color: transparent !important;
  border: none !important;
  box-shadow: none !important;
  color: rgba(255, 255, 255, 0.5) !important;
  font-size: 9px !important;
  padding: 1px 2px !important;
  transform: scale(0.8) !important;
}

.fp-watermark a,
[data-fp-watermark] a {
  color: rgba(255, 255, 255, 0.5) !important;
  text-decoration: none !important;
  background: none !important;
  border: none !important;
  box-shadow: none !important;
  font-size: 9px !important;
}

.fp-watermark a:hover,
[data-fp-watermark] a:hover {
  color: rgba(255, 255, 255, 0.8) !important;
}

/* fullPage.js navigation styling */
#fp-nav ul li a span,
.fp-slidesNav ul li a span {
  background: var(--neutral-800) !important;
}

#fp-nav ul li a.active span,
.fp-slidesNav ul li a.active span,
#fp-nav ul li:hover a.active span,
.fp-slidesNav ul li:hover a.active span {
  background: var(--neutral-800) !important;
}

#fp-nav ul li:hover a span,
.fp-slidesNav ul li:hover a span {
  background: var(--neutral-800) !important;
}

/* Navigation tooltips */
#fp-nav ul li .fp-tooltip {
  color: var(--neutral-800) !important;
  background: none !important;
  border: none !important;
}

/* ==========================================
 * HERO SECTION LAYOUT
 * ========================================== */

.hero {
  height: 100vh;
  max-height: 100vh;
  display: flex;
  align-items: center;
  background: var(--color-bg-primary) !important;
  position: relative;
  overflow: hidden;
  box-sizing: border-box;
  padding-top: 80px; /* Account for fixed header */
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(var(--space-large), var(--space-huge), var(--space-huge));
  align-items: center;
  width: 100%;
  max-height: calc(100vh - 120px);
  overflow: hidden;
}

.hero-text {
  text-align: center;
  max-width: 100%;
  padding-left: calc(var(--space-medium) + 40px);
}

.hero-title {
  font-family: 'Space Grotesk', 'Pretendard GOV', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  font-size: clamp(1.75rem, 8vw, 4rem); /* PHASE 2A - 반응형 clamp 개선 */
  font-weight: var(--font-weight-extrabold);
  line-height: var(--line-height-tight);
  margin-bottom: var(--space-medium);
  color: var(--color-text-primary);
}

.title-line {
  display: block;
  white-space: nowrap;
  word-break: keep-all;
}

.title-highlight {
  display: block;
  color: var(--color-primary);
  position: relative;
  white-space: nowrap;
  word-break: keep-all;
}

/* Mobile responsive title breaks */
@media (max-width: 767px) {
  .title-line,
  .title-highlight {
    display: inline;
    white-space: nowrap;
  }

  .hero-title br {
    display: none;
  }
}

.hero-description {
  font-size: clamp(0.875rem, 4vw, 1.375rem); /* PHASE 2A - 반응형 clamp 개선 */
  line-height: 1.6;
  color: var(--color-text-secondary);
  max-width: 900px;
  margin: 0 auto var(--space-large);
  word-break: keep-all;
  overflow-wrap: break-word;
}

.hero-cta {
  display: flex;
  flex-direction: column;
  gap: var(--space-large);
  align-items: center;
  margin-top: clamp(3rem, 5vw, 4rem);
}

.hero-cta .btn {
  width: 100%;
  max-width: 200px;
}

.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 70vh;
  padding: 40px 0;
}

/* Tablet Layout */
@media (min-width: 768px) {
  .hero-content {
    gap: clamp(var(--space-large), 96px, var(--space-huge));
  }
}

/* Desktop Layout */
@media (min-width: 1024px) {
  .hero-content {
    grid-template-columns: 1fr 1fr;
    gap: clamp(var(--space-large), 115px, var(--space-huge));
    text-align: left;
    max-width: min(1200px, 1728px);
    margin: 0 auto;
  }

  .hero-text {
    text-align: left;
  }

  .hero-cta {
    flex-direction: row;
    justify-content: flex-start;
    margin-top: var(--space-large);
  }

  .hero-cta .btn {
    width: auto;
    min-width: 180px;
  }

  .hero-description {
    margin: 0 0 var(--space-medium) 0;
  }
}

/* Large Desktop */
@media (min-width: 1400px) {
  .hero-content {
    max-width: min(1400px, 1632px);
    gap: clamp(var(--space-huge), 154px, 120px);
  }
}




/* ==========================================
 * FEATURE SECTION LAYOUT
 * ========================================== */

.feature-section {
  padding: var(--space-medium) 0;
  box-sizing: border-box;
}

.feature-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: clamp(2vh, 3vh, 4vh);
  min-height: calc(100vh - 80px);
  padding: clamp(2vh, 3vh, 5vh) clamp(2vw, 4vw, 6vw);
  text-align: center;
  box-sizing: border-box;
  overflow: hidden;
}

.feature-text {
  text-align: center;
  width: 100%;
  max-width: min(90vw, 1200px);
}

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

.feature-text-right .feature-title,
.feature-text-right .feature-description {
  margin-left: auto !important;
  margin-right: 0 !important;
}

.feature-title {
  font-family: 'Space Grotesk', 'Pretendard GOV', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  font-size: clamp(1.375rem, 6vw, 3rem); /* PHASE 2A - 반응형 clamp 개선 */
  font-weight: var(--font-weight-bold);
  line-height: 1.3;
  margin: 0 auto var(--space-large);
  color: var(--color-text-primary);
  max-width: none;
  width: 100%;
  white-space: normal; /* PHASE 2A - nowrap 제거 */
  word-break: keep-all;
  overflow-wrap: break-word;
}

.feature-description {
  font-size: clamp(0.875rem, 4vw, 1.3125rem); /* PHASE 2A - 반응형 clamp 개선 */
  line-height: 1.7;
  color: var(--color-text-secondary);
  max-width: 650px;
  margin: 0 auto;
  text-align: center;
  word-break: keep-all;
  overflow-wrap: break-word;
}

.feature-media {
  display: flex;
  justify-content: center;
  align-items: center;
}

/* Reverse layout for alternating sections */
.feature-reverse .feature-content {
  direction: rtl;
}

.feature-reverse .feature-text,
.feature-reverse .feature-media {
  direction: ltr;
}

/* Tablet Layout */
@media (min-width: 768px) {
  .feature-content {
    gap: clamp(3vh, 4vh, 5vh);
    padding: clamp(3vh, 4vh, 6vh) clamp(3vw, 5vw, 8vw);
  }
}

/* Desktop Layout */
@media (min-width: 1024px) {
  .feature-content {
    flex-direction: column;
    gap: clamp(4vh, 5vh, 6vh);
    max-width: min(85vw, 1400px);
    margin: 0 auto;
    padding: clamp(4vh, 5vh, 7vh) clamp(4vw, 6vw, 10vw);
  }

  .feature-text {
    text-align: center;
    padding: 0;
    max-width: min(90vw, 1200px);
  }

  .feature-media {
    padding: 0;
    width: 100%;
    max-width: min(80vw, 1000px);
  }

  .feature-description {
    margin: 0 auto;
    max-width: min(85vw, 800px);
  }

}

/* Large Desktop */
@media (min-width: 1400px) {
  .feature-content {
    max-width: min(80vw, 1600px);
    gap: clamp(5vh, 6vh, 7vh);
    padding: clamp(5vh, 6vh, 8vh) clamp(5vw, 7vw, 12vw);
  }

  .feature-text {
    padding: 0;
    max-width: min(85vw, 1200px);
  }

  .feature-media {
    padding: 0;
    max-width: min(75vw, 1200px);
  }
}

/* ==========================================
 * USE CASES AS FEATURE SECTIONS
 * ========================================== */

.usecase-icon {
  font-size: clamp(40px, 48px, 56px);
  margin-bottom: var(--space-medium);
  display: inline-block;
}

/* Use case sections inherit feature section styles */

/* ==========================================
 * DOWNLOAD/CTA SECTION LAYOUT
 * ========================================== */

.download-section {
  position: relative;
  padding: var(--space-medium) 0;
  box-sizing: border-box;
  overflow: hidden;
}

.download-section .container {
  position: relative;
  z-index: 3;
}

.download-background {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -2;
  background: var(--color-bg-primary); /* Fallback background */
}

.download-video {
  position: absolute;
  top: 50%;
  right: 0;
  min-width: 100%;
  min-height: 100%;
  width: auto;
  height: auto;
  transform: translateY(-50%);
  object-fit: cover;
}

.download-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(255, 255, 255, 0.4);
  z-index: 2;
}

/* Mobile optimization - show video on all screens */
@media (max-width: 767.98px) {
  .download-video {
    display: block;
    object-fit: cover;
  }

  .download-overlay {
    background: rgba(0, 0, 0, 0.5);
  }

  .footer-cta-title {
    color: var(--color-text-inverse);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
  }

  .footer-cta-description {
    color: var(--color-text-secondary);
    text-shadow: none;
  }
}

.footer-cta-content {
  position: relative;
  text-align: center;
  max-width: 600px;
  margin: 0 auto;
  z-index: 1;
}

.footer-cta-title {
  font-family: 'Space Grotesk', 'Pretendard GOV', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  font-size: clamp(29px, 38px, 48px);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--space-medium);
  color: white;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.footer-cta-description {
  font-size: clamp(16px, 18px, 20px);
  line-height: var(--line-height-normal);
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: var(--space-large);
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

.footer-cta-button {
  display: flex;
  justify-content: center;
}

/* ==========================================
 * FOOTER SECTION LAYOUT
 * ========================================== */

.footer-section {
  background: #f5f5f5;
  color: #1a1a1a;
  padding: var(--space-large) 21px; /* 양쪽 21px 패딩 고정 */
  box-sizing: border-box;
  overflow: hidden;
  border-top: 1px solid rgba(0, 0, 0, 0.1);
}

.footer-section .container {
  max-width: 100% !important;
  width: 100% !important;
  padding: 0 !important;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-medium);
  margin-bottom: var(--space-medium);
  min-height: 80px;
  width: 100%;
  padding: 0; /* footer-section에서 21px 패딩 처리 */
}

.footer-brand {
  text-align: left;
  flex: 0 1 auto;
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-width: fit-content;
}

.footer-brand-content {
  display: flex;
  align-items: center;
  gap: var(--space-small);
  margin-bottom: var(--space-micro);
}

.footer-company-logo {
  height: 28px;
  width: auto;
  object-fit: contain;
}

.footer-company-logo-center {
  height: 40px;
  width: auto;
  object-fit: contain;
  display: block;
  margin: var(--space-medium) auto 0 auto;
}

.footer-logo {
  font-family: 'Space Grotesk', 'Pretendard GOV', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: var(--font-weight-bold);
  color: #8B5CF6;
  margin: 0 0 var(--space-medium) 0;
}

.footer-tagline {
  font-size: var(--font-size-sm);
  color: var(--neutral-600);
  margin: 0;
}

.footer-links-section {
  margin-bottom: var(--space-small);
}

.footer-links-title {
  font-size: var(--text-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-light);
  margin-bottom: var(--space-small);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.footer-nav {
  display: flex;
  justify-content: flex-end;
  flex: 0 1 auto;
}

.footer-links {
  display: flex;
  gap: clamp(var(--space-medium), 3vw, var(--space-large));
  flex-wrap: wrap;
  justify-content: flex-end;
}

.footer-link {
  font-size: var(--font-size-sm);
  color: var(--neutral-700);
  text-decoration: none;
  transition: color var(--transition-fast);
  padding: 2px 0;
}

.footer-link:hover {
  color: var(--color-primary);
}

.footer-bottom {
  border-top: 1px solid rgba(0, 0, 0, 0.1);
  padding-top: var(--space-small);
  text-align: center;
  margin-top: var(--space-medium);
  margin-left: 16px;
  margin-right: 16px;
}

.copyright {
  font-size: var(--font-size-xs);
  color: var(--neutral-600);
  margin: 0;
}

/* Tablet Layout */
@media (min-width: 768px) {
  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr 1fr;
    text-align: left;
    gap: var(--space-large);
  }

  .footer-brand {
    margin-bottom: 0;
  }

  .footer-links-section {
    margin-bottom: 0;
  }
}

/* Desktop Layout */
@media (min-width: 1024px) {
  .footer-grid {
    grid-template-columns: 3fr 1fr 1fr 1fr;
    gap: var(--space-huge);
  }
}

/* ==========================================
 * CONTAINER SYSTEM
 * ========================================== */

.container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 clamp(var(--space-small), var(--space-medium), var(--space-large));
  width: 100%;
}

/* Section Headers */
.section-header {
  text-align: center;
  margin-bottom: var(--space-huge);
  padding-top: var(--space-medium);
}

.section-title {
  font-family: 'Space Grotesk', 'Pretendard GOV', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  font-size: clamp(1.375rem, 6vw, 3rem) !important; /* feature-title과 동일 */
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--space-medium);
  color: var(--color-text-primary);
}

.section-description {
  font-size: clamp(14px, 16px, 18px);
  line-height: var(--line-height-normal);
  color: var(--color-text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* Character Background & Window */
.character-background {
  position: relative;
  width: 100%;
  max-width: 400px;
  margin: 0 auto;
}

.character-window {
  position: relative;
  background: var(--color-surface-primary);
  border-radius: var(--radius-lg);
  padding: 3.125rem 5rem;
  border: 0.0625rem solid rgba(0, 0, 0, 0.12);
  box-shadow: 0 0.5rem 1.5625rem rgba(0, 0, 0, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  max-width: 43.75rem;
  min-height: 28.125rem;
}

.character-window::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2rem;
  background: #f1f5f9;
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  border-bottom: 0.0625rem solid rgba(0, 0, 0, 0.1);
}

.character-window::after {
  content: '';
  position: absolute;
  top: 0.625rem;
  left: 0.75rem;
  width: 0.5rem;
  height: 0.5rem;
  background: #ef4444;
  border-radius: 50%;
  box-shadow:
    0.875rem 0 0 #f59e0b,
    1.75rem 0 0 #10b981;
  z-index: 3;
}

.character-image {
  position: relative;
  max-width: 26.25rem;
  height: auto;
  border-radius: var(--radius-lg);
  transition: transform 0.3s ease;
  margin: 0;
}

.character-image:hover {
  transform: scale(1.05);
}

/* Video Placeholder */
.video-placeholder {
  background: var(--color-bg-soft);
  border-radius: var(--radius-lg);
  padding: clamp(var(--space-medium), var(--space-large), var(--space-huge));
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: clamp(10rem, 25vh, 18rem);
  max-height: clamp(12rem, 30vh, 22rem);
  cursor: pointer;
  transition: all var(--transition-fast);
  aspect-ratio: 16/9;
  width: 100%;
}

.video-placeholder:hover {
  transform: scale(1.02);
}

.video-content {
  text-align: center;
  color: var(--color-white);
}

.play-icon {
  font-size: clamp(3rem, 6vw, 5rem);
  margin-bottom: var(--space-small);
  opacity: 0.9;
}

.video-label {
  font-size: var(--font-size-sm);
  opacity: 0.8;
  margin: 0;
}

/* Skip Link */
.skip-link {
  position: absolute;
  top: -2.5rem;
  left: 0.375rem;
  background: var(--color-primary);
  color: var(--color-white);
  padding: 0.5rem;
  text-decoration: none;
  border-radius: var(--radius-sm);
  z-index: 1000;
}

.skip-link:focus {
  top: 0.375rem;
}