/* ===========================================
   AI강사 오기태 - GEO 최적화 웹사이트 스타일
   =========================================== */

/* Reset & Base */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --primary: #1a56db;
  --primary-dark: #1141a5;
  --primary-light: #e8f0fe;
  --secondary: #0ea5e9;
  --accent: #f59e0b;
  --dark: #0f172a;
  --dark-2: #1e293b;
  --dark-3: #334155;
  --mid: #64748b;
  --light: #f8fafc;
  --light-2: #f1f5f9;
  --white: #ffffff;
  --border: #e2e8f0;
  --success: #10b981;
  --gradient: linear-gradient(135deg, #1a56db 0%, #0ea5e9 100%);
  --gradient-dark: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --shadow: 0 4px 16px rgba(0,0,0,0.1);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.15);
  --radius: 12px;
  --radius-lg: 20px;
  --font: 'Noto Sans KR', sans-serif;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  color: var(--dark);
  line-height: 1.7;
  background: var(--white);
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  height: auto;
}

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

ul {
  list-style: none;
}

/* 접근성: 포커스 스타일 */
:focus-visible {
  outline: 3px solid var(--primary);
  outline-offset: 2px;
  border-radius: 4px;
}

/* Skip to main content */
.skip-link {
  position: absolute;
  top: -100%;
  left: 0;
  background: var(--primary);
  color: white;
  padding: 8px 16px;
  z-index: 9999;
}
.skip-link:focus {
  top: 0;
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== 네비게이션 ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(226,232,240,0.8);
  transition: all 0.3s ease;
}

.header.scrolled {
  box-shadow: var(--shadow);
}

.nav {
  padding: 0;
}

.nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.1rem;
  color: var(--dark);
  transition: opacity 0.2s;
}

.nav-logo:hover {
  opacity: 0.8;
}

.logo-icon {
  width: 38px;
  height: 38px;
  background: var(--gradient);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1rem;
}

.logo-text {
  font-size: 1.05rem;
  color: var(--dark-2);
}

.logo-text strong {
  color: var(--primary);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-link {
  padding: 8px 14px;
  border-radius: 8px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--dark-3);
  transition: all 0.2s;
}

.nav-link:hover {
  background: var(--light-2);
  color: var(--primary);
}

.nav-link.nav-cta {
  background: var(--primary);
  color: white;
  padding: 8px 18px;
  font-weight: 600;
}

.nav-link.nav-cta:hover {
  background: var(--primary-dark);
  color: white;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--dark);
  border-radius: 2px;
  transition: all 0.3s;
}

/* ===== 히어로 섹션 ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 120px 0 80px;
  overflow: hidden;
  background: var(--gradient-dark);
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 50%, rgba(26,86,219,0.3) 0%, transparent 50%),
    radial-gradient(circle at 80% 30%, rgba(14,165,233,0.2) 0%, transparent 50%),
    radial-gradient(circle at 50% 80%, rgba(245,158,11,0.1) 0%, transparent 50%);
}

.hero .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-content {
  color: white;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(26,86,219,0.3);
  border: 1px solid rgba(255,255,255,0.2);
  color: #93c5fd;
  padding: 6px 16px;
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 24px;
}

.hero-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 900;
  line-height: 1.25;
  margin-bottom: 16px;
  color: white;
}

.hero-name {
  display: block;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-size: clamp(2.5rem, 5vw, 3.8rem);
}

.hero-sub {
  font-size: 1.05rem;
  color: #94a3b8;
  line-height: 1.8;
  margin-bottom: 36px;
}

.hero-stats {
  display: flex;
  gap: 32px;
  margin-bottom: 40px;
}

.stat-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.stat-num {
  font-size: 1.8rem;
  font-weight: 900;
  color: white;
  line-height: 1;
}

.stat-label {
  font-size: 0.75rem;
  color: #64748b;
  font-weight: 500;
}

.hero-cta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* ===== 히어로 비주얼 ===== */
.hero-visual {
  position: relative;
  height: 500px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-circle {
  width: 320px;
  height: 380px;
  border-radius: 28px;
  overflow: hidden;
  position: relative;
  z-index: 2;
  box-shadow: 0 0 60px rgba(26,86,219,0.35), 0 24px 64px rgba(0,0,0,0.4);
  border: 3px solid rgba(255,255,255,0.12);
}

.hero-profile-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
  display: block;
  background: #e8f0fe;
}

.ai-bubble {
  position: absolute;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.15);
  backdrop-filter: blur(8px);
  border-radius: 16px;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  gap: 10px;
  color: white;
  font-size: 0.85rem;
  font-weight: 600;
  animation: float 3s ease-in-out infinite;
}

.ai-bubble i {
  font-size: 1.2rem;
  color: #60a5fa;
}

.bubble-1 { top: 40px; left: 20px; animation-delay: 0s; }
.bubble-2 { top: 40px; right: 20px; animation-delay: 0.8s; }
.bubble-3 { bottom: 80px; left: 20px; animation-delay: 1.6s; }
.bubble-4 { bottom: 80px; right: 20px; animation-delay: 2.4s; }

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

/* ===== 버튼 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 10px;
  font-family: var(--font);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all 0.2s ease;
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background: var(--gradient);
  color: white;
  box-shadow: 0 4px 14px rgba(26,86,219,0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(26,86,219,0.4);
  color: white;
}

.btn-secondary {
  background: rgba(255,255,255,0.08);
  color: white;
  border: 1px solid rgba(255,255,255,0.2);
}

.btn-secondary:hover {
  background: rgba(255,255,255,0.15);
  color: white;
}

.btn-large {
  padding: 14px 32px;
  font-size: 1rem;
}

.btn-full {
  width: 100%;
  justify-content: center;
}

/* ===== 신뢰 밴드 ===== */
.trust-band {
  background: var(--light-2);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 20px 0;
}

.trust-band .container {
  display: flex;
  align-items: center;
  gap: 32px;
  flex-wrap: wrap;
}

.trust-label {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--mid);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  white-space: nowrap;
}

.trust-list {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
}

.trust-list li {
  font-size: 0.875rem;
  color: var(--dark-3);
  font-weight: 500;
  padding: 4px 12px;
  background: white;
  border: 1px solid var(--border);
  border-radius: 100px;
}

/* ===== 공통 섹션 헤더 ===== */
.section-header {
  text-align: center;
  margin-bottom: 56px;
}

.section-badge {
  display: inline-block;
  background: var(--primary-light);
  color: var(--primary);
  padding: 4px 14px;
  border-radius: 100px;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.section-title {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 900;
  line-height: 1.3;
  color: var(--dark);
  margin-bottom: 16px;
}

.section-sub {
  font-size: 1rem;
  color: var(--mid);
  line-height: 1.8;
  max-width: 600px;
  margin: 0 auto;
}

/* ===== 왜 AI 교육 ===== */
.why-section {
  padding: 100px 0;
  background: white;
}

.why-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.why-card {
  background: var(--light);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  transition: all 0.3s ease;
}

.why-card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.why-icon {
  width: 56px;
  height: 56px;
  background: var(--primary-light);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 1.4rem;
  margin-bottom: 20px;
}

.why-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--dark);
}

.why-card p {
  font-size: 0.9rem;
  color: var(--mid);
  line-height: 1.8;
}

/* ===== 강의 프로그램 ===== */
.programs-section {
  padding: 100px 0;
  background: var(--dark-gradient, #f8fafc);
  background: linear-gradient(180deg, #f8fafc 0%, #eff6ff 100%);
}

.programs-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.program-card {
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  position: relative;
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
}

.program-card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.program-card.featured {
  border-color: var(--primary);
  box-shadow: 0 0 0 2px rgba(26,86,219,0.2), var(--shadow);
}

.program-badge {
  position: absolute;
  top: -12px;
  left: 24px;
  background: var(--accent);
  color: white;
  padding: 4px 12px;
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 700;
}

.program-icon {
  width: 52px;
  height: 52px;
  background: var(--primary-light);
  border-radius: 13px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 1.3rem;
  margin-bottom: 18px;
}

.program-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--dark);
}

.program-card > p {
  font-size: 0.85rem;
  color: var(--mid);
  line-height: 1.7;
  margin-bottom: 16px;
}

.program-list {
  flex: 1;
  margin-bottom: 20px;
}

.program-list li {
  font-size: 0.82rem;
  color: var(--dark-3);
  padding: 5px 0;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 8px;
}

.program-list li::before {
  content: '✓';
  color: var(--primary);
  font-weight: 700;
  font-size: 0.75rem;
  flex-shrink: 0;
}

.program-cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--primary);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 8px 0;
  transition: gap 0.2s;
}

.program-cta:hover {
  gap: 10px;
}

/* ===== 교육 효과 ===== */
.effects-section {
  padding: 100px 0;
  background: var(--gradient-dark);
  color: white;
}

.effects-section .section-badge {
  background: rgba(255,255,255,0.1);
  color: #93c5fd;
}

.effects-section .section-title {
  color: white;
}

.effects-section .section-sub {
  color: #94a3b8;
}

.effects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.effect-item {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: all 0.3s ease;
}

.effect-item:hover {
  background: rgba(255,255,255,0.08);
  border-color: rgba(255,255,255,0.2);
  transform: translateY(-4px);
}

.effect-icon {
  width: 48px;
  height: 48px;
  background: rgba(26,86,219,0.3);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #60a5fa;
  font-size: 1.2rem;
  margin-bottom: 16px;
}

.effect-item h3 {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: white;
}

.effect-item p {
  font-size: 0.85rem;
  color: #94a3b8;
  line-height: 1.7;
}

/* ===== 강사 소개 ===== */
.about-section {
  padding: 100px 0;
  background: white;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1.6fr;
  gap: 80px;
  align-items: center;
}

.about-visual {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
}

/* 프로필 실제 사진 */
.profile-img-wrap {
  position: relative;
  display: inline-block;
}

.profile-img-wrap::before {
  content: '';
  position: absolute;
  inset: -12px;
  border-radius: 50%;
  border: 2px dashed rgba(26,86,219,0.25);
  animation: spin 20s linear infinite;
  z-index: 0;
}

.profile-photo {
  display: block;
  width: 320px;
  height: auto;
  border-radius: 24px;
  object-fit: cover;
  object-position: top center;
  box-shadow: var(--shadow-lg);
  position: relative;
  z-index: 1;
  filter: drop-shadow(0 8px 32px rgba(26,86,219,0.15));
  transition: transform 0.4s ease;
}

.profile-img-wrap:hover .profile-photo {
  transform: scale(1.02);
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.about-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
}

.about-tags span {
  background: var(--primary-light);
  color: var(--primary);
  padding: 5px 14px;
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 600;
}

.about-content .section-badge {
  margin-bottom: 12px;
}

.about-name {
  font-size: 2rem;
  font-weight: 900;
  color: var(--dark);
  margin-bottom: 4px;
}

.about-role {
  font-size: 0.9rem;
  color: var(--primary);
  font-weight: 600;
  margin-bottom: 20px;
}

.about-desc {
  font-size: 0.95rem;
  color: var(--mid);
  line-height: 1.9;
  margin-bottom: 14px;
}

.about-desc strong {
  color: var(--dark);
}

.about-highlights {
  margin: 24px 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.highlight-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.9rem;
  color: var(--dark-3);
}

.highlight-item i {
  color: var(--success);
  flex-shrink: 0;
  margin-top: 3px;
}

.about-channels {
  display: flex;
  gap: 12px;
  margin-top: 20px;
}

.channel-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  background: var(--light-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--dark-3);
  transition: all 0.2s;
}

.channel-link:hover {
  background: var(--primary);
  border-color: var(--primary);
  color: white;
}

/* ===== 교육 사례 ===== */
.cases-section {
  padding: 100px 0;
  background: var(--light);
}

.cases-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.case-card {
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: all 0.3s ease;
}

.case-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.case-tag {
  display: inline-block;
  background: var(--primary);
  color: white;
  padding: 3px 12px;
  border-radius: 100px;
  font-size: 0.72rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.case-card h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 12px;
}

.case-info {
  display: flex;
  gap: 16px;
  margin-bottom: 14px;
  flex-wrap: wrap;
}

.case-info span {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 0.8rem;
  color: var(--mid);
}

.case-info i {
  color: var(--primary);
  font-size: 0.75rem;
}

.case-card p {
  font-size: 0.875rem;
  color: var(--mid);
  line-height: 1.8;
  margin-bottom: 16px;
}

.case-result {
  background: var(--primary-light);
  color: var(--primary-dark);
  padding: 10px 16px;
  border-radius: 8px;
  font-size: 0.82rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
}

.case-result i {
  color: var(--accent);
}

/* ===== 인사이트 ===== */
.insight-section {
  padding: 100px 0;
  background: white;
}

.insight-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.insight-card {
  background: var(--light);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: all 0.3s ease;
  cursor: pointer;
}

.insight-card:hover {
  box-shadow: var(--shadow);
  transform: translateY(-4px);
  border-color: var(--primary);
}

.insight-tag {
  display: inline-block;
  background: var(--primary-light);
  color: var(--primary);
  padding: 3px 10px;
  border-radius: 100px;
  font-size: 0.72rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.insight-card h3 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 10px;
  line-height: 1.5;
}

.insight-card p {
  font-size: 0.85rem;
  color: var(--mid);
  line-height: 1.7;
  margin-bottom: 14px;
}

.insight-topics {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.insight-topics span {
  background: white;
  border: 1px solid var(--border);
  color: var(--dark-3);
  padding: 3px 10px;
  border-radius: 100px;
  font-size: 0.72rem;
}

/* ===== FAQ ===== */
.faq-section {
  padding: 100px 0;
  background: var(--light-2);
}

.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  background: none;
  border: none;
  cursor: pointer;
  font-family: var(--font);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--dark);
  text-align: left;
  gap: 16px;
  transition: all 0.2s;
}

.faq-question:hover {
  background: var(--light-2);
}

.faq-question[aria-expanded="true"] {
  background: var(--primary-light);
  color: var(--primary);
}

.faq-question i {
  flex-shrink: 0;
  transition: transform 0.3s;
  color: var(--primary);
}

.faq-question[aria-expanded="true"] i {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.faq-answer.open {
  max-height: 300px;
}

.faq-answer p {
  padding: 20px 24px;
  font-size: 0.9rem;
  color: var(--mid);
  line-height: 1.8;
  border-top: 1px solid var(--border);
}

/* ===== 문의하기 ===== */
.contact-section {
  padding: 100px 0;
  background: white;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 80px;
  align-items: start;
}

.contact-info .section-badge {
  margin-bottom: 12px;
}

.contact-info .section-title {
  margin-bottom: 16px;
  text-align: left;
}

.contact-info > p {
  font-size: 0.95rem;
  color: var(--mid);
  line-height: 1.8;
  margin-bottom: 32px;
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.9rem;
  color: var(--dark-3);
}

.contact-item i {
  width: 36px;
  height: 36px;
  background: var(--primary-light);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 0.85rem;
  flex-shrink: 0;
}

/* 폼 */
.contact-form {
  background: var(--light);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-group label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--dark-3);
}

.form-group label span {
  color: #ef4444;
  margin-left: 2px;
}

.form-group input,
.form-group select,
.form-group textarea {
  padding: 11px 16px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-family: var(--font);
  font-size: 0.875rem;
  color: var(--dark);
  background: white;
  transition: border-color 0.2s;
  outline: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(26,86,219,0.1);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: #cbd5e1;
}

.form-group textarea {
  resize: vertical;
  min-height: 100px;
}

.form-notice {
  font-size: 0.75rem;
  color: var(--mid);
  text-align: center;
}

/* 폼 성공 메시지 */
.form-success {
  background: #ecfdf5;
  border: 1px solid #a7f3d0;
  border-radius: var(--radius);
  padding: 20px 24px;
  text-align: center;
  color: #065f46;
  font-size: 0.9rem;
  font-weight: 500;
  display: none;
}

.form-success.show {
  display: block;
}

/* ===== 푸터 ===== */
.footer {
  background: var(--dark);
  color: #94a3b8;
  padding: 60px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: white;
  font-size: 1.05rem;
  margin-bottom: 16px;
}

.footer-logo i {
  font-size: 1.2rem;
  color: #60a5fa;
}

.footer-logo strong {
  color: #60a5fa;
}

.footer-brand p {
  font-size: 0.85rem;
  line-height: 1.7;
  margin-bottom: 20px;
}

.footer-channels {
  display: flex;
  gap: 10px;
}

.footer-channels a {
  width: 36px;
  height: 36px;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #94a3b8;
  font-size: 0.9rem;
  transition: all 0.2s;
}

.footer-channels a:hover {
  background: var(--primary);
  border-color: var(--primary);
  color: white;
}

.footer-nav h3 {
  font-size: 0.8rem;
  font-weight: 700;
  color: white;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 16px;
}

.footer-nav ul {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-nav a {
  font-size: 0.85rem;
  color: #94a3b8;
  transition: color 0.2s;
}

.footer-nav a:hover {
  color: white;
}

.footer-contact h3 {
  font-size: 0.8rem;
  font-weight: 700;
  color: white;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 16px;
}

.footer-contact p {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: #94a3b8;
  margin-bottom: 8px;
}

.footer-contact i {
  color: #60a5fa;
  width: 16px;
}

.footer-bottom {
  padding: 20px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.footer-bottom p {
  font-size: 0.8rem;
  color: #475569;
}

.footer-geo {
  font-size: 0.75rem;
  color: #334155;
}

/* ===== 스크롤 투 탑 버튼 ===== */
.scroll-top {
  position: fixed;
  bottom: 28px;
  right: 28px;
  width: 44px;
  height: 44px;
  background: var(--gradient);
  color: white;
  border: none;
  border-radius: 12px;
  cursor: pointer;
  font-size: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transform: translateY(10px);
  transition: all 0.3s;
  z-index: 100;
  box-shadow: var(--shadow);
}

.scroll-top.visible {
  opacity: 1;
  transform: translateY(0);
}

.scroll-top:hover {
  transform: translateY(-2px);
}

/* ===== 반응형 ===== */
@media (max-width: 1024px) {
  .programs-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .effects-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 900px) {
  .hero .container {
    grid-template-columns: 1fr;
  }
  .hero-visual {
    display: none;
  }
  .why-grid {
    grid-template-columns: 1fr;
  }
  .about-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  .cases-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    display: none;
    position: absolute;
    top: 70px;
    left: 0;
    right: 0;
    background: white;
    flex-direction: column;
    padding: 16px;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow);
    gap: 4px;
  }
  .nav-menu.open {
    display: flex;
  }
  .nav-link {
    width: 100%;
    padding: 10px 14px;
  }
  .nav-toggle {
    display: flex;
  }
  .programs-grid {
    grid-template-columns: 1fr;
  }
  .effects-grid {
    grid-template-columns: 1fr;
  }
  .insight-grid {
    grid-template-columns: 1fr;
  }
  .hero-stats {
    flex-wrap: wrap;
    gap: 16px;
  }
  .hero-cta {
    flex-direction: column;
  }
  .form-row {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }
  .contact-form {
    padding: 24px;
  }
  .why-section,
  .programs-section,
  .effects-section,
  .about-section,
  .cases-section,
  .insight-section,
  .faq-section,
  .contact-section {
    padding: 60px 0;
  }
}

@media (max-width: 480px) {
  .hero {
    padding: 100px 0 60px;
  }
  .hero-title {
    font-size: 1.8rem;
  }
  .hero-name {
    font-size: 2.2rem;
  }
  .trust-band .container {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }
  .profile-placeholder {
    width: 200px;
    height: 200px;
    font-size: 3.5rem;
  }
}