/* ========================================
   ABOUT SECTION - 회사 소개 섹션
   ======================================== */

.about {
  padding: 80px 20px;
  background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
  position: relative;
  overflow: hidden;
}

.about::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="20" height="20" patternUnits="userSpaceOnUse"><path d="M 20 0 L 0 0 0 20" fill="none" stroke="rgba(29,136,177,0.05)" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
  opacity: 0.3;
  pointer-events: none;
}

.about__container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 20px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 60px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.about__content {
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.about__title {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 800;
  background: linear-gradient(135deg, #1d88b1 0%, #2d5aa0 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 24px;
  line-height: 1.1;
  letter-spacing: -0.02em;
  text-shadow: 0 2px 4px rgba(29, 136, 177, 0.2);
  filter: drop-shadow(0 1px 2px rgba(45, 90, 160, 0.3));
}

.about__description {
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  color: #475569;
  line-height: 1.7;
  margin-bottom: 40px;
  font-weight: 500;
  text-shadow: 0 1px 2px rgba(71, 85, 105, 0.1);
}

/* ========================================
   ABOUT STATS - 모바일 최적화 통계 슬라이더
   ======================================== */

.about__stats {
  margin-bottom: 40px;
  position: relative;
}

.about__stats-slider {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  padding: 20px 0;
  scroll-behavior: smooth;
}

.about__stat-card {
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 20px;
  padding: 32px 24px;
  text-align: center;
  color: #1e293b;
  position: relative;
  overflow: hidden;
  min-height: 180px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.about__stat-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, #1d88b1 0%, #2d5aa0 50%, #1d88b1 100%);
  transform: scaleX(0);
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.about__stat-card:hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
  border-color: rgba(29, 136, 177, 0.3);
}

.about__stat-card:hover::before {
  transform: scaleX(1);
}

.about__stat-icon {
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, #1d88b1 0%, #2d5aa0 100%);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  color: white;
  font-size: 24px;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 8px 24px rgba(29, 136, 177, 0.3);
}

.about__stat-card:hover .about__stat-icon {
  transform: scale(1.1) rotate(5deg);
  box-shadow: 0 12px 32px rgba(29, 136, 177, 0.4);
}

.about__stat-content {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 4px;
  margin-bottom: 12px;
}

.about__stat-value {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  background: linear-gradient(135deg, #1d88b1 0%, #2d5aa0 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
}

.about__stat-unit {
  font-size: clamp(1.25rem, 2.5vw, 1.75rem);
  font-weight: 700;
  color: #1d88b1;
  line-height: 1;
}

.about__stat-label {
  font-size: 14px;
  color: #64748b;
  font-weight: 600;
  display: block;
  margin-top: 4px;
  line-height: 1.3;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.about__stat-badge {
  position: absolute;
  top: 20px;
  right: 20px;
  background: linear-gradient(135deg, #1d88b1 0%, #2d5aa0 100%);
  backdrop-filter: blur(10px);
  border-radius: 20px;
  padding: 6px 12px;
  font-size: 11px;
  color: white;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  box-shadow: 0 4px 12px rgba(29, 136, 177, 0.3);
}

/* ========================================
   STATS NAVIGATION - 통계 네비게이션
   ======================================== */

.about__stats-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  margin-top: var(--space-4);
}

.about__stats-btn {
  width: 2.5rem;
  height: 2.5rem;
  background: rgba(29, 136, 177, 0.1);
  border: 1px solid rgba(29, 136, 177, 0.3);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--brand-primary);
  cursor: pointer;
  transition: all 0.3s ease;
  backdrop-filter: blur(10px);
}

.about__stats-btn:hover {
  background: rgba(29, 136, 177, 0.2);
  transform: scale(1.1);
}

.about__stats-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.about__stats-btn svg {
  width: 1.25rem;
  height: 1.25rem;
}

.about__stats-dots {
  display: flex;
  gap: var(--space-2);
}

.about__stats-dot {
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: rgba(29, 136, 177, 0.3);
  cursor: pointer;
  transition: all 0.3s ease;
}

.about__stats-dot.active {
  background: var(--brand-primary);
  transform: scale(1.2);
}

/* ========================================
   STATS CARD VARIANTS - 통계 카드 변형
   ======================================== */

.about__stat-card--experience .about__stat-icon {
  background: linear-gradient(135deg, #1d88b1 0%, #2d5aa0 100%);
}

.about__stat-card--projects .about__stat-icon {
  background: linear-gradient(135deg, #10b981 0%, #059669 100%);
}

.about__stat-card--satisfaction .about__stat-icon {
  background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
}

.about__image {
  position: relative;
  border-radius: var(--border-radius-3xl);
  overflow: hidden;
  box-shadow: var(--shadow-xl);
}

.about__image img {
  width: 100%;
  height: auto;
  display: block;
}

.about__logo-section {
  position: absolute;
  top: var(--space-6);
  right: var(--space-6);
  z-index: 2;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-radius: var(--border-radius-xl);
  padding: var(--space-4);
  box-shadow: var(--shadow-lg);
}

.about__logo {
  width: 120px;
  height: auto;
  display: block;
  transition: transform var(--transition-duration-200) var(--transition-timing-function-ease);
}

.about__logo-section:hover .about__logo {
  transform: scale(1.1);
}

/* ========================================
   ABOUT CHAT CARDS - About 섹션 카카오톡 채팅 후기
   ======================================== */

.about__visual {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
  max-width: 1000px;
  margin: 0 auto;
}

.about__chat-card {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: 20px;
  box-shadow: 
    0 12px 40px rgba(0, 0, 0, 0.1),
    0 4px 12px rgba(0, 0, 0, 0.05);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
  min-height: 160px;
  padding: 24px;
}

.about__chat-card:hover {
  transform: translateY(-12px) scale(1.02);
  box-shadow: 
    0 24px 80px rgba(0, 0, 0, 0.15),
    0 12px 32px rgba(0, 0, 0, 0.1);
  border-color: rgba(29, 136, 177, 0.3);
}

/* 카카오톡 헤더 스타일 */
.about__chat-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
  padding-bottom: 16px;
  border-bottom: 1px solid rgba(0, 0, 0, 0.08);
}

.about__chat-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  overflow: hidden;
  flex-shrink: 0;
  border: 3px solid #FFE812;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
  transition: transform 0.3s ease;
}

.about__chat-card:hover .about__chat-avatar {
  transform: scale(1.1);
}

.about__chat-avatar-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.about__chat-info {
  flex: 1;
  min-width: 0;
}

.about__chat-name {
  font-size: 14px;
  font-weight: 700;
  color: #1e293b;
  margin-bottom: 4px;
  line-height: 1.2;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.about__chat-time {
  font-size: 12px;
  color: #64748b;
  line-height: 1.2;
  font-weight: 500;
}

.about__chat-status {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
}

.about__chat-status-dot {
  width: 10px;
  height: 10px;
  background: #10b981;
  border-radius: 50%;
  animation: pulse 2s infinite;
  box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
}

/* 카카오톡 메시지 스타일 */
.about__chat-message {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.about__chat-bubble {
  background: linear-gradient(135deg, #FFE812 0%, #FFD700 100%);
  border-radius: 20px;
  padding: 16px 20px;
  position: relative;
  box-shadow: 0 4px 16px rgba(255, 232, 18, 0.3);
  max-width: 100%;
  transition: all 0.3s ease;
}

.about__chat-card:hover .about__chat-bubble {
  transform: scale(1.02);
  box-shadow: 0 8px 24px rgba(255, 232, 18, 0.4);
}

.about__chat-bubble::before {
  content: '';
  position: absolute;
  top: 12px;
  left: -8px;
  width: 0;
  height: 0;
  border-top: 8px solid transparent;
  border-bottom: 8px solid transparent;
  border-right: 8px solid #FFE812;
}

.about__chat-bubble p {
  margin: 0 0 12px 0;
  font-size: 14px;
  line-height: 1.6;
  color: #1e293b;
  word-break: keep-all;
  overflow-wrap: break-word;
  font-weight: 500;
}

.about__chat-rating {
  display: flex;
  gap: 4px;
  align-items: center;
}

.about__chat-star {
  font-size: 16px;
  color: #FFD700;
  animation: star-twinkle 1.5s ease-in-out infinite;
  filter: drop-shadow(0 2px 4px rgba(255, 215, 0, 0.3));
}

.about__chat-star:nth-child(2) { animation-delay: 0.1s; }
.about__chat-star:nth-child(3) { animation-delay: 0.2s; }
.about__chat-star:nth-child(4) { animation-delay: 0.3s; }
.about__chat-star:nth-child(5) { animation-delay: 0.4s; }

/* 카드별 색상 변형 */
.about__chat-card--review1 .about__chat-avatar {
  border-color: #FFE812;
}

.about__chat-card--review2 .about__chat-avatar {
  border-color: #FF6B6B;
}

.about__chat-card--review3 .about__chat-avatar {
  border-color: #4ECDC4;
}

.about__chat-card--review4 .about__chat-avatar {
  border-color: #A8E6CF;
}

/* 카드별 배경 그라데이션 */
.about__chat-card--review1 {
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.95), rgba(255, 232, 18, 0.05));
}

.about__chat-card--review2 {
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.95), rgba(255, 107, 107, 0.05));
}

.about__chat-card--review3 {
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.95), rgba(78, 205, 196, 0.05));
}

.about__chat-card--review4 {
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.95), rgba(168, 230, 207, 0.05));
}

/* ========================================
   RESPONSIVE DESIGN - 반응형 디자인
   ======================================== */

/* 모바일 (767px 이하) */
@media (max-width: 767px) {
  .about {
    padding: 60px 16px;
  }
  
  .about__container {
    gap: 40px;
  }
  
  .about__title {
    font-size: clamp(2rem, 6vw, 2.5rem);
    margin-bottom: 20px;
  }
  
  .about__description {
    font-size: clamp(0.9rem, 3vw, 1rem);
    margin-bottom: 32px;
  }
  
  .about__stats-slider {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  
  .about__stat-card {
    padding: 24px 20px;
    min-height: 140px;
  }
  
  .about__stat-icon {
    width: 48px;
    height: 48px;
    font-size: 20px;
    margin-bottom: 16px;
  }
  
  .about__stat-value {
    font-size: clamp(1.75rem, 5vw, 2.5rem);
  }
  
  .about__stat-unit {
    font-size: clamp(1rem, 3vw, 1.25rem);
  }
  
  .about__stat-badge {
    top: 16px;
    right: 16px;
    padding: 4px 8px;
    font-size: 10px;
  }
  
  .about__visual {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  
  .about__chat-card {
    padding: 20px;
    min-height: 140px;
  }
  
  .about__chat-avatar {
    width: 40px;
    height: 40px;
  }
  
  .about__chat-name {
    font-size: 13px;
  }
  
  .about__chat-time {
    font-size: 11px;
  }
  
  .about__chat-bubble {
    padding: 12px 16px;
  }
  
  .about__chat-bubble p {
    font-size: 13px;
  }
  
  .about__chat-star {
    font-size: 14px;
  }
}

/* 태블릿 (768px - 1023px) */
@media (min-width: 768px) and (max-width: 1023px) {
  .about {
    padding: 80px 32px;
  }
  
  .about__container {
    gap: 50px;
  }
  
  .about__stats-slider {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }
  
  .about__visual {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }
  
  .about__chat-card {
    padding: 24px;
    min-height: 150px;
  }
}

/* 데스크톱 (1024px 이상) */
@media (min-width: 1024px) {
  .about {
    padding: 100px 40px;
  }
  
  .about__container {
    gap: 60px;
  }
  
  .about__stats-slider {
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }
  
  .about__visual {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }
}

/* 대형 데스크톱 (1440px 이상) */
@media (min-width: 1440px) {
  .about {
    padding: 120px 60px;
  }
  
  .about__container {
    max-width: 1600px;
    gap: 80px;
  }
  
  .about__stats-slider {
    gap: 32px;
  }
  
  .about__visual {
    gap: 32px;
  }
}

/* ========================================
   ANIMATIONS - 애니메이션
   ======================================== */

@keyframes pulse {
  0% {
    box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
  }
  70% {
    box-shadow: 0 0 0 10px rgba(16, 185, 129, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(16, 185, 129, 0);
  }
}

@keyframes star-twinkle {
  0%, 100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.6;
    transform: scale(1.1);
  }
}