/* =========================================================
   홍남선 개인 홈페이지 스타일시트 v2 — 라이트 프리미엄 테마
   참고 디자인: Stripe, Linear, Apple — 밝고 전문적인 느낌
   ========================================================= */

/* ─── 0. CSS 커스텀 속성 (디자인 토큰) ─── */
:root {
  /* 배경 색상 (밝은 계열) */
  --bg-primary:       #FFFFFF;              /* 순백 */
  --bg-secondary:     #F8FAFF;              /* 아주 연한 블루 그레이 */
  --bg-tertiary:      #EEF2FF;              /* 연한 라벤더 */
  --bg-card:          #FFFFFF;              /* 카드: 흰 배경 */
  --bg-card-hover:    #F0F7FF;              /* 카드 호버: 더 밝은 파랑 */
  --bg-hero:          #0F1F3D;              /* Hero만 딥 네이비 유지 (임팩트) */
  --bg-footer:        #0A1526;              /* 푸터 다크 */

  /* 메인 포인트 컬러 */
  --navy:             #0F1F3D;              /* 딥 네이비 (주요 강조) */
  --navy-mid:         #1E3A5F;
  --cyan:             #0EA5E9;              /* 스카이 블루 */
  --cyan-dark:        #0284C7;
  --cyan-light:       #E0F2FE;              /* 연한 시안 배경용 */
  --gold:             #F59E0B;              /* 앰버 골드 */
  --gold-light:       #FEF3C7;              /* 연한 골드 배경용 */
  --purple:           #7C3AED;
  --purple-light:     #EDE9FE;

  /* 텍스트 */
  --text-primary:     #0F172A;              /* 거의 검정 */
  --text-secondary:   #475569;              /* 미디엄 그레이 */
  --text-muted:       #94A3B8;              /* 연한 그레이 */
  --text-hero:        #F0F4FF;              /* Hero 내 텍스트 */

  /* 테두리 */
  --border-card:      rgba(0, 0, 0, 0.07);
  --border-hover:     rgba(14, 165, 233, 0.4);
  --border-gold:      rgba(245, 159, 11, 0.3);

  /* 그라디언트 */
  --gradient-main:    linear-gradient(135deg, var(--cyan) 0%, var(--purple) 100%);
  --gradient-gold:    linear-gradient(135deg, var(--gold) 0%, #FCD34D 100%);
  --gradient-navy:    linear-gradient(135deg, #0F1F3D 0%, #1E3A5F 100%);
  --gradient-section: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);

  /* 글꼴 */
  --font-kr:          'Noto Sans KR', sans-serif;
  --font-en:          'Outfit', sans-serif;

  /* 레이아웃 */
  --header-height:    72px;
  --container-max:    1200px;
  --section-gap:      120px;

  /* 모서리 */
  --radius-sm:        8px;
  --radius-md:        14px;
  --radius-lg:        20px;
  --radius-xl:        28px;
  --radius-full:      9999px;

  /* 그림자 (밝은 배경에 맞게 미묘하게) */
  --shadow-sm:        0 1px 4px rgba(0,0,0,0.06), 0 4px 12px rgba(0,0,0,0.04);
  --shadow-md:        0 4px 20px rgba(0,0,0,0.08), 0 8px 30px rgba(0,0,0,0.04);
  --shadow-lg:        0 8px 40px rgba(0,0,0,0.12), 0 2px 8px rgba(0,0,0,0.06);
  --shadow-hover:     0 16px 48px rgba(14,165,233,0.15), 0 4px 16px rgba(0,0,0,0.06);
  --shadow-gold:      0 8px 32px rgba(245,159,11,0.25);
  --shadow-glow-cyan: 0 0 24px rgba(14,165,233,0.25);

  /* 애니메이션 */
  --transition-base:  all 0.3s ease;
  --transition-slow:  all 0.5s ease;
}

/* ─── 1. 리셋 & 기본 설정 ─── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
}

body {
  font-family: var(--font-kr);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition-base);
}

img { max-width: 100%; display: block; }
button { background: none; border: none; cursor: pointer; font-family: inherit; }
ul, ol { list-style: none; }

/* ─── 2. 공통 레이아웃 ─── */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: var(--section-gap) 0;
  position: relative;
}

.section-header {
  text-align: center;
  margin-bottom: 64px;
}

.section-tag {
  display: inline-block;
  font-family: var(--font-en);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cyan);
  background: var(--cyan-light);
  border-radius: var(--radius-full);
  padding: 6px 18px;
  margin-bottom: 16px;
}

.section-title {
  font-family: var(--font-kr);
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-bottom: 16px;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 560px;
  margin: 0 auto;
  line-height: 1.75;
}

/* 그라디언트 텍스트 */
.text-gradient {
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.text-gold   { color: var(--gold); }
.text-cyan   { color: var(--cyan); }
.text-purple { color: var(--purple); }

/* 스크롤 페이드인 */
[data-aos] {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
[data-aos].aos-animate { opacity: 1; transform: translateY(0); }
[data-aos][data-aos-delay="100"] { transition-delay: 0.1s; }
[data-aos][data-aos-delay="150"] { transition-delay: 0.15s; }
[data-aos][data-aos-delay="200"] { transition-delay: 0.2s; }
[data-aos][data-aos-delay="250"] { transition-delay: 0.25s; }
[data-aos][data-aos-delay="300"] { transition-delay: 0.3s; }
[data-aos][data-aos-delay="400"] { transition-delay: 0.4s; }

/* ─── 3. HEADER ─── */
#main-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  height: var(--header-height);
  transition: var(--transition-slow);
  border-bottom: 1px solid transparent;
  /* 초기 상태: 투명 (Hero가 어두우므로) */
}

/* Hero 영역에서는 투명 */
#main-header.hero-mode {
  background: transparent;
}

/* 스크롤 후 밝은 헤더 */
#main-header.scrolled {
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom-color: rgba(0, 0, 0, 0.06);
  box-shadow: 0 1px 12px rgba(0, 0, 0, 0.05);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

.logo {
  display: flex;
  flex-direction: column;
  gap: 0;
  text-decoration: none;
}

.logo-name {
  font-family: var(--font-kr);
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--text-hero);  /* 초기 Hero에서는 흰색 */
  letter-spacing: -0.02em;
  line-height: 1.1;
  transition: color 0.3s ease;
}

.logo-title {
  font-size: 0.65rem;
  color: rgba(255,255,255,0.65);
  font-weight: 500;
  letter-spacing: 0.02em;
  transition: color 0.3s ease;
}

/* 스크롤 후 로고 색상 변경 */
#main-header.scrolled .logo-name { color: var(--text-primary); }
#main-header.scrolled .logo-title { color: var(--text-secondary); }

/* PC 내비게이션 */
.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-link {
  font-family: var(--font-en);
  font-size: 0.9rem;
  font-weight: 500;
  color: rgba(255,255,255,0.8);  /* 초기: 흰색 (Hero 위) */
  padding: 8px 16px;
  border-radius: var(--radius-full);
  transition: var(--transition-base);
}

.nav-link:hover { color: white; background: rgba(255,255,255,0.1); }
.nav-link.active { color: white; background: rgba(255,255,255,0.15); }

/* 스크롤 후 nav 색상 */
#main-header.scrolled .nav-link { color: var(--text-secondary); }
#main-header.scrolled .nav-link:hover,
#main-header.scrolled .nav-link.active { color: var(--cyan); background: var(--cyan-light); }

/* 헤더 CTA */
.btn-cta-header {
  display: flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-kr);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--bg-hero);
  background: var(--gradient-gold);
  padding: 10px 22px;
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-gold);
  white-space: nowrap;
  transition: var(--transition-base);
}
.btn-cta-header:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(245,159,11,0.4);
}

/* 햄버거 */
.hamburger { display: none; flex-direction: column; gap: 5px; padding: 8px; }
.hamburger span {
  display: block; width: 24px; height: 2px;
  background: white;  /* Hero 위: 흰색 */
  border-radius: 2px; transition: var(--transition-base);
}
#main-header.scrolled .hamburger span { background: var(--text-primary); }
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* 모바일 메뉴 */
.mobile-nav {
  display: none; flex-direction: column;
  padding: 12px 24px 20px;
  background: rgba(255,255,255,0.98);
  backdrop-filter: blur(20px);
  border-top: 1px solid var(--border-card);
  box-shadow: var(--shadow-md);
  gap: 4px;
}
.mobile-nav.open { display: flex; }
.mobile-nav-link {
  font-size: 1rem; font-weight: 500; color: var(--text-secondary);
  padding: 10px 12px; border-radius: var(--radius-sm); transition: var(--transition-base);
}
.mobile-nav-link:hover { color: var(--cyan); background: var(--cyan-light); }
.mobile-cta-btn {
  display: block; font-weight: 700; text-align: center;
  color: var(--bg-hero); background: var(--gradient-gold);
  padding: 12px; border-radius: var(--radius-md); margin-top: 8px;
}

/* ─── 4. HERO 섹션 (딥 네이비 유지 — 첫인상 임팩트) ─── */
.hero-section {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding: var(--section-gap) 24px;
  background: var(--bg-hero);
}

#particles-canvas {
  position: absolute;
  inset: 0; width: 100%; height: 100%; z-index: 0;
}

.hero-overlay {
  position: absolute; inset: 0;
  background:
    radial-gradient(ellipse at 15% 50%, rgba(14, 165, 233, 0.1) 0%, transparent 55%),
    radial-gradient(ellipse at 85% 20%, rgba(124, 58, 237, 0.1) 0%, transparent 55%),
    radial-gradient(ellipse at 50% 100%, rgba(245, 159, 11, 0.06) 0%, transparent 50%);
  z-index: 1;
}

.hero-content {
  position: relative; z-index: 2;
  text-align: center; max-width: 820px;
}

.hero-badge {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 0.82rem; font-weight: 600; color: var(--gold);
  background: rgba(245, 159, 11, 0.12);
  border: 1px solid rgba(245, 159, 11, 0.35);
  border-radius: var(--radius-full); padding: 7px 18px;
  margin-bottom: 28px;
  animation: badgePulse 3s ease-in-out infinite;
}
@keyframes badgePulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(245,159,11,0.3); }
  50%       { box-shadow: 0 0 0 8px rgba(245,159,11,0); }
}

.hero-title {
  font-family: var(--font-kr);
  font-size: clamp(2.4rem, 5.5vw, 4rem);
  font-weight: 900; line-height: 1.2;
  letter-spacing: -0.03em; margin-bottom: 24px;
  color: var(--text-hero);
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: rgba(240, 244, 255, 0.7);
  margin-bottom: 48px; line-height: 1.8;
}
.hero-subtitle strong { color: var(--text-hero); font-weight: 700; }

/* 핵심 숫자 */
.hero-stats {
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 48px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius-xl);
  padding: 28px 48px;
  backdrop-filter: blur(12px);
  flex-wrap: wrap; gap: 0;
}

.stat-item {
  display: flex; flex-direction: column;
  align-items: center; padding: 0 36px; gap: 4px;
}

.stat-number {
  font-family: var(--font-en);
  font-size: clamp(2.2rem, 4vw, 3rem); font-weight: 900;
  background: var(--gradient-main);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text; line-height: 1;
}

.stat-unit {
  font-family: var(--font-en); font-size: 1rem; font-weight: 700;
  color: var(--cyan); align-self: flex-end;
  margin-bottom: 4px; margin-left: -4px;
  -webkit-text-fill-color: var(--cyan);
}

.stat-label {
  font-size: 0.8rem; color: rgba(240,244,255,0.55);
  font-weight: 500; white-space: nowrap;
}

.stat-divider {
  width: 1px; height: 48px; background: rgba(255,255,255,0.12);
}

/* CTA 버튼 */
.hero-cta-group {
  display: flex; align-items: center; justify-content: center;
  gap: 16px; flex-wrap: wrap;
}

.btn-primary {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--font-kr); font-size: 1rem; font-weight: 700;
  color: var(--bg-hero); background: var(--gradient-gold);
  padding: 16px 36px; border-radius: var(--radius-full);
  box-shadow: var(--shadow-gold); transition: var(--transition-base);
  white-space: nowrap;
}
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 16px 40px rgba(245,159,11,0.4); }

.btn-secondary {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--font-kr); font-size: 1rem; font-weight: 600;
  color: var(--text-hero); background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.2);
  padding: 16px 36px; border-radius: var(--radius-full);
  backdrop-filter: blur(8px); transition: var(--transition-base);
  white-space: nowrap;
}
.btn-secondary:hover {
  background: rgba(255,255,255,0.15);
  border-color: rgba(14,165,233,0.5); color: var(--cyan);
  transform: translateY(-3px);
}

/* 스크롤 인디케이터 */
.scroll-indicator {
  position: absolute; bottom: 36px; left: 50%;
  transform: translateX(-50%); z-index: 2;
  display: flex; flex-direction: column;
  align-items: center; gap: 8px;
  color: rgba(240,244,255,0.4); font-size: 0.72rem;
  font-weight: 500; letter-spacing: 0.1em; text-transform: uppercase;
  animation: fadeInUp 2s ease 1.5s both;
}
.scroll-arrow {
  width: 20px; height: 32px; border-radius: 12px;
  border: 2px solid rgba(255,255,255,0.2); position: relative;
}
.scroll-arrow::after {
  content: ''; position: absolute; top: 6px; left: 50%;
  transform: translateX(-50%); width: 3px; height: 8px;
  background: rgba(255,255,255,0.3); border-radius: 2px;
  animation: scrollBounce 2s ease-in-out infinite;
}
@keyframes scrollBounce {
  0%,100% { top: 6px; opacity: 1; }
  50%     { top: 14px; opacity: 0.2; }
}
@keyframes fadeInUp {
  from { opacity: 0; transform: translateX(-50%) translateY(12px); }
  to   { opacity: 1; transform: translateX(-50%) translateY(0); }
}

/* ─────────────────────────────────────────────────────
   이하 모든 섹션: 밝은 배경 / 어두운 텍스트
   ───────────────────────────────────────────────────── */

/* ─── 5. ABOUT 섹션 ─── */
.about-section {
  background: var(--bg-secondary);
  position: relative; overflow: hidden;
}

/* 배경 장식 블롭 */
.about-section::before {
  content: '';
  position: absolute; top: -150px; right: -150px;
  width: 450px; height: 450px;
  background: radial-gradient(circle, rgba(14,165,233,0.06) 0%, transparent 70%);
  pointer-events: none;
}
.about-section::after {
  content: '';
  position: absolute; bottom: -100px; left: -100px;
  width: 350px; height: 350px;
  background: radial-gradient(circle, rgba(124,58,237,0.05) 0%, transparent 70%);
  pointer-events: none;
}

/* About 레이아웃 */
.about-layout {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 60px; align-items: start;
}

/* 프로필 카드 */
.profile-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-xl);
  padding: 36px 28px;
  display: flex; flex-direction: column;
  align-items: center; gap: 14px;
  box-shadow: var(--shadow-md);
  position: sticky; top: calc(var(--header-height) + 20px);
  transition: var(--transition-base);
}
.profile-card:hover {
  box-shadow: var(--shadow-hover);
  border-color: rgba(14,165,233,0.15);
  transform: translateY(-4px);
}

/* 프로필 이미지 */
.profile-img-wrap {
  width: 140px; height: 140px; border-radius: 50%;
  overflow: hidden; position: relative;
  box-shadow:
    0 0 0 4px white,
    0 0 0 6px rgba(14,165,233,0.25),
    var(--shadow-md);
}
.profile-img { width: 100%; height: 100%; object-fit: cover; object-position: center top; }
.profile-fallback {
  width: 100%; height: 100%; background: var(--gradient-main);
  display: flex; align-items: center; justify-content: center;
  font-size: 3rem; color: white;
}

.profile-name {
  font-size: 1.5rem; font-weight: 800;
  letter-spacing: -0.02em; color: var(--text-primary);
}
.profile-role { font-size: 0.88rem; color: var(--cyan); font-weight: 600; text-align: center; }
.profile-org  { font-size: 0.82rem; color: var(--text-secondary); }

/* 자격증 배지 */
.cert-badges { display: flex; flex-direction: column; gap: 8px; width: 100%; margin-top: 8px; }
.cert-badge {
  display: flex; align-items: center; gap: 8px;
  font-size: 0.78rem; font-weight: 600; color: var(--navy-mid);
  background: var(--gold-light); border-radius: var(--radius-full);
  padding: 6px 14px;
}

/* SNS */
.profile-socials { display: flex; gap: 12px; margin-top: 4px; }
.social-link {
  width: 40px; height: 40px; border-radius: 50%;
  background: var(--bg-secondary); border: 1px solid var(--border-card);
  display: flex; align-items: center; justify-content: center;
  color: var(--text-secondary); font-size: 0.95rem;
  box-shadow: var(--shadow-sm); transition: var(--transition-base);
}
.social-link:hover {
  color: var(--cyan); border-color: var(--cyan);
  background: var(--cyan-light); transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
}

/* About 오른쪽 */
.about-content { display: flex; flex-direction: column; gap: 36px; }

.about-story {
  background: var(--bg-card); border: 1px solid var(--border-card);
  border-radius: var(--radius-lg); padding: 28px 32px;
  box-shadow: var(--shadow-sm);
}
.about-story-title {
  font-size: 1.1rem; font-weight: 700; margin-bottom: 14px; color: var(--text-primary);
  display: flex; align-items: center; gap: 10px;
}
.about-story p { color: var(--text-secondary); line-height: 1.85; font-size: 0.95rem; }
.about-story p + p { margin-top: 14px; }

/* 타임라인 */
.career-timeline { position: relative; }
.timeline-title {
  font-family: var(--font-en); font-size: 0.72rem; font-weight: 700;
  letter-spacing: 0.15em; text-transform: uppercase; color: var(--text-muted); margin-bottom: 20px;
}
.timeline { position: relative; padding-left: 24px; }
.timeline::before {
  content: ''; position: absolute; left: 7px; top: 0; bottom: 0; width: 2px;
  background: linear-gradient(180deg, var(--cyan) 0%, var(--purple) 100%); opacity: 0.3;
}
.timeline-item { position: relative; margin-bottom: 24px; }
.timeline-dot {
  position: absolute; left: -21px; top: 6px;
  width: 12px; height: 12px; border-radius: 50%;
  background: var(--cyan); border: 2px solid white;
  box-shadow: 0 0 0 3px rgba(14,165,233,0.2), var(--shadow-sm);
}
.timeline-content { display: flex; flex-direction: column; gap: 4px; }
.timeline-year {
  font-family: var(--font-en); font-size: 0.78rem; font-weight: 700;
  color: var(--cyan); letter-spacing: 0.05em;
}
.timeline-content p { font-size: 0.9rem; color: var(--text-secondary); line-height: 1.6; }

/* 교육 철학 */
.philosophy-title {
  font-family: var(--font-en); font-size: 0.72rem; font-weight: 700;
  letter-spacing: 0.15em; text-transform: uppercase; color: var(--text-muted); margin-bottom: 16px;
}
.philosophy-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.philosophy-card {
  background: var(--bg-card); border: 1px solid var(--border-card);
  border-radius: var(--radius-lg); padding: 24px 20px; text-align: center;
  box-shadow: var(--shadow-sm); transition: var(--transition-base);
}
.philosophy-card:hover {
  border-color: rgba(14,165,233,0.2); box-shadow: var(--shadow-hover);
  transform: translateY(-4px); background: var(--bg-primary);
}
.philosophy-icon { font-size: 2rem; margin-bottom: 12px; }
.philosophy-card h5 { font-size: 0.9rem; font-weight: 700; margin-bottom: 8px; color: var(--text-primary); }
.philosophy-card p  { font-size: 0.8rem; color: var(--text-secondary); line-height: 1.6; }

/* ─── 6. PORTFOLIO 섹션 ─── */
.portfolio-section {
  background: var(--bg-primary);
  position: relative;
}

/* 섹션 구분선 */
.portfolio-section::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent, rgba(14,165,233,0.2), transparent);
}

/* 필터 탭 */
.portfolio-filters {
  display: flex; align-items: center; justify-content: center;
  gap: 8px; margin-bottom: 40px; flex-wrap: wrap;
}
.filter-btn {
  display: inline-flex; align-items: center; gap: 6px;
  font-family: var(--font-kr); font-size: 0.85rem; font-weight: 600;
  color: var(--text-secondary); background: var(--bg-secondary);
  border: 1px solid var(--border-card); border-radius: var(--radius-full);
  padding: 8px 20px; transition: var(--transition-base); cursor: pointer;
  box-shadow: var(--shadow-sm);
}
.filter-btn:hover { color: var(--cyan); border-color: rgba(14,165,233,0.3); background: var(--cyan-light); }
.filter-btn.active { color: white; background: var(--gradient-main); border-color: transparent; box-shadow: var(--shadow-glow-cyan); }

/* 포트폴리오 그리드 */
.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
}

/* 카드 visible 강제 (JS 동적 생성이므로 data-aos 무시) */
.portfolio-card {
  opacity: 1 !important; transform: none !important;
}

/* 포트폴리오 카드 */
.portfolio-card {
  background: var(--bg-card); border: 1px solid var(--border-card);
  border-radius: var(--radius-lg); padding: 28px; cursor: pointer;
  transition: var(--transition-base); position: relative; overflow: hidden;
  display: flex; flex-direction: column; gap: 14px;
  box-shadow: var(--shadow-sm);
}
.portfolio-card:hover {
  border-color: rgba(14,165,233,0.2);
  transform: translateY(-6px); box-shadow: var(--shadow-hover);
}
.portfolio-card.hidden { display: none; }

/* 카드 상단 색 라인 액센트 */
.portfolio-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: var(--gradient-main); border-radius: 3px 3px 0 0;
  opacity: 0; transition: opacity 0.3s ease;
}
.portfolio-card:hover::before { opacity: 1; }

.card-icon-row {
  display: flex; align-items: center; justify-content: space-between;
}
.card-emoji { font-size: 2.2rem; line-height: 1; }

/* 카테고리 뱃지 */
.cat-badge {
  font-size: 0.7rem; font-weight: 700;
  border-radius: var(--radius-full); padding: 4px 12px; white-space: nowrap;
}
.cat-badge.ai-biz       { color: var(--cyan);   background: var(--cyan-light); }
.cat-badge.productivity { color: #B45309;        background: var(--gold-light); }
.cat-badge.edutech      { color: var(--purple);  background: var(--purple-light); }
.cat-badge.game         { color: #166534;        background: #DCFCE7; }

.card-title { font-size: 1.1rem; font-weight: 800; color: var(--text-primary); letter-spacing: -0.01em; }
.card-desc  { font-size: 0.85rem; color: var(--text-secondary); line-height: 1.6; }

.card-tags  { display: flex; flex-wrap: wrap; gap: 6px; }
.tag {
  font-size: 0.7rem; font-weight: 600;
  color: var(--text-muted); background: var(--bg-secondary);
  border: 1px solid var(--border-card); border-radius: var(--radius-full); padding: 3px 10px;
}

.card-footer {
  display: flex; align-items: center; justify-content: space-between;
  margin-top: auto; padding-top: 14px; border-top: 1px solid var(--border-card);
}
.card-link-btn {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 0.78rem; font-weight: 700; color: var(--cyan);
  transition: var(--transition-base);
}
.card-link-btn:hover { gap: 10px; color: var(--cyan-dark); }
.card-unavailable { font-size: 0.75rem; color: var(--text-muted); display: flex; align-items: center; gap: 4px; }

/* === 모달 === */
.modal-overlay {
  display: none; position: fixed; inset: 0; z-index: 2000;
  background: rgba(15,31,61,0.5); backdrop-filter: blur(8px);
  justify-content: center; align-items: center; padding: 24px;
  animation: fadeIn 0.2s ease;
}
.modal-overlay.open { display: flex; }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

.modal-container {
  background: var(--bg-primary); border: 1px solid var(--border-card);
  border-radius: var(--radius-xl);
  max-width: 600px; width: 100%; max-height: 90vh; overflow-y: auto;
  position: relative; animation: slideUp 0.3s ease;
  box-shadow: 0 32px 80px rgba(0,0,0,0.18), var(--shadow-glow-cyan);
}
@keyframes slideUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}
.modal-container::-webkit-scrollbar { width: 6px; }
.modal-container::-webkit-scrollbar-track { background: transparent; }
.modal-container::-webkit-scrollbar-thumb { background: var(--border-card); border-radius: 3px; }

.modal-close {
  position: absolute; top: 16px; right: 16px;
  width: 36px; height: 36px; border-radius: 50%;
  background: var(--bg-secondary); border: 1px solid var(--border-card);
  color: var(--text-secondary); font-size: 1rem;
  display: flex; align-items: center; justify-content: center;
  transition: var(--transition-base); z-index: 1; box-shadow: var(--shadow-sm);
}
.modal-close:hover { color: var(--text-primary); background: var(--bg-tertiary); }

.modal-body { padding: 36px; }

/* 모달 내부 (JS 동적 생성) */
.modal-emoji { font-size: 3rem; margin-bottom: 12px; }
.modal-cat-badge { margin-bottom: 12px; }
.modal-title { font-size: 1.6rem; font-weight: 900; margin-bottom: 8px; letter-spacing: -0.02em; color: var(--text-primary); }
.modal-short-desc { font-size: 0.95rem; color: var(--cyan); font-weight: 600; margin-bottom: 20px; }
.modal-detail-title {
  font-size: 0.72rem; font-weight: 700; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--text-muted); margin-bottom: 10px; margin-top: 24px;
}
.modal-detail-text { font-size: 0.92rem; color: var(--text-secondary); line-height: 1.75; }
.modal-tech-list { display: flex; flex-wrap: wrap; gap: 8px; }
.modal-tech-tag {
  font-size: 0.78rem; font-weight: 600; color: var(--purple);
  background: var(--purple-light); border-radius: var(--radius-full); padding: 4px 14px;
}
.modal-actions { display: flex; gap: 12px; margin-top: 28px; flex-wrap: wrap; }
.modal-btn-live {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 0.9rem; font-weight: 700; color: white;
  background: var(--gradient-main); padding: 12px 28px;
  border-radius: var(--radius-full); transition: var(--transition-base);
  box-shadow: var(--shadow-glow-cyan);
}
.modal-btn-live:hover { transform: translateY(-2px); box-shadow: 0 12px 32px rgba(14,165,233,0.3); }
.modal-btn-dev {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 0.9rem; font-weight: 600;
  color: var(--text-muted); border: 1px solid var(--border-card);
  padding: 12px 24px; border-radius: var(--radius-full); pointer-events: none;
}

/* ─── 7. PROGRAMS 섹션 ─── */
.programs-section {
  background: var(--bg-secondary);
  position: relative; overflow: hidden;
}

/* 배경 장식 */
.programs-section::before {
  content: ''; position: absolute; top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 800px; height: 500px;
  background: radial-gradient(ellipse, rgba(14,165,233,0.04) 0%, transparent 65%);
  pointer-events: none;
}

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

.program-card {
  background: var(--bg-card); border: 1px solid var(--border-card);
  border-radius: var(--radius-xl); overflow: hidden;
  display: flex; flex-direction: column;
  box-shadow: var(--shadow-md); transition: var(--transition-base);
}
.program-card:hover {
  border-color: rgba(14,165,233,0.2);
  transform: translateY(-6px); box-shadow: var(--shadow-hover);
}

.program-card-header {
  padding: 32px 28px 24px;
  text-align: center; position: relative;
  border-bottom: 1px solid var(--border-card);
}

/* 각 카드별 헤더 배경 색조 */
.program-b2c .program-card-header {
  background: linear-gradient(135deg, #FFFBEB 0%, #FEF3C7 100%);
}
.program-b2b .program-card-header {
  background: linear-gradient(135deg, #F0F9FF 0%, var(--cyan-light) 100%);
}
.program-public .program-card-header {
  background: linear-gradient(135deg, #FAF5FF 0%, var(--purple-light) 100%);
}

.program-badge {
  display: inline-block; font-size: 0.7rem; font-weight: 800;
  letter-spacing: 0.1em; text-transform: uppercase;
  border-radius: var(--radius-full); padding: 4px 14px; margin-bottom: 16px;
}
.b2c-badge    { color: #92400E; background: var(--gold-light); }
.b2b-badge    { color: var(--cyan-dark); background: var(--cyan-light); }
.public-badge { color: var(--purple); background: var(--purple-light); }

.program-icon-wrap {
  width: 64px; height: 64px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 16px; font-size: 1.8rem; box-shadow: var(--shadow-sm);
}
.program-b2c .program-icon-wrap    { background: white; color: var(--gold); box-shadow: 0 4px 16px rgba(245,159,11,0.2); }
.program-b2b .program-icon-wrap    { background: white; color: var(--cyan); box-shadow: 0 4px 16px rgba(14,165,233,0.2); }
.program-public .program-icon-wrap { background: white; color: var(--purple); box-shadow: 0 4px 16px rgba(124,58,237,0.2); }

.program-card-header h3 {
  font-size: 1.25rem; font-weight: 800; letter-spacing: -0.01em;
  margin-bottom: 6px; color: var(--text-primary);
}
.program-subtitle { font-size: 0.82rem; color: var(--text-secondary); }

.program-card-body {
  padding: 24px 28px; flex: 1;
  display: flex; flex-direction: column; gap: 20px;
}
.program-desc { font-size: 0.88rem; color: var(--text-secondary); line-height: 1.75; }

/* 아코디언 */
.curriculum-accordion { display: flex; flex-direction: column; gap: 4px; }
.accordion-btn {
  display: flex; align-items: center; justify-content: space-between;
  font-size: 0.82rem; font-weight: 600; color: var(--text-primary);
  background: var(--bg-secondary); border: 1px solid var(--border-card);
  border-radius: var(--radius-sm); padding: 10px 14px; cursor: pointer;
  text-align: left; transition: var(--transition-base); width: 100%;
}
.accordion-btn:hover { background: var(--cyan-light); border-color: rgba(14,165,233,0.25); color: var(--cyan-dark); }
.accordion-btn.open  { color: var(--cyan-dark); border-color: rgba(14,165,233,0.35); background: var(--cyan-light); }
.accordion-btn .fa-chevron-down { transition: transform 0.3s ease; font-size: 0.75rem; flex-shrink: 0; }
.accordion-btn.open .fa-chevron-down { transform: rotate(180deg); }

.accordion-content {
  display: none; padding: 12px 14px;
  background: #F0F9FF; border-radius: var(--radius-sm);
  border: 1px solid rgba(14,165,233,0.12);
  font-size: 0.8rem; color: var(--text-secondary); line-height: 1.7;
}
.accordion-content.open { display: block; animation: fadeIn 0.2s ease; }

/* 혜택 목록 */
.program-benefits { display: flex; flex-direction: column; gap: 8px; }
.program-benefits li {
  display: flex; align-items: center; gap: 10px;
  font-size: 0.83rem; color: var(--text-secondary);
}

/* 특징 목록 (B2B) */
.program-features-list { display: flex; flex-direction: column; gap: 16px; }
.program-features-list li { display: flex; align-items: flex-start; gap: 14px; }
.program-features-list i { font-size: 1rem; margin-top: 3px; flex-shrink: 0; }
.program-features-list strong { display: block; font-size: 0.9rem; font-weight: 700; color: var(--text-primary); margin-bottom: 2px; }
.program-features-list p { font-size: 0.8rem; color: var(--text-secondary); line-height: 1.5; }

/* 레퍼런스 */
.reference-list h5 { display: flex; align-items: center; gap: 6px; font-size: 0.82rem; font-weight: 700; color: var(--text-secondary); margin-bottom: 12px; }
.reference-item {
  display: flex; align-items: flex-start; gap: 12px;
  padding: 12px; background: var(--bg-secondary);
  border-radius: var(--radius-sm); margin-bottom: 8px;
  border: 1px solid var(--border-card);
}
.ref-icon { font-size: 1.3rem; flex-shrink: 0; }
.reference-item strong { display: block; font-size: 0.85rem; font-weight: 700; color: var(--text-primary); margin-bottom: 3px; }
.reference-item p { font-size: 0.78rem; color: var(--text-secondary); line-height: 1.5; }

/* 카드 푸터 */
.program-card-footer { padding: 20px 28px 28px; }
.btn-program {
  display: flex; align-items: center; justify-content: center; gap: 10px;
  font-family: var(--font-kr); font-size: 0.95rem; font-weight: 700;
  padding: 14px; border-radius: var(--radius-md); width: 100%;
  transition: var(--transition-base);
}
.btn-gold   { background: linear-gradient(135deg, #F59E0B, #FCD34D); color: #78350F; box-shadow: var(--shadow-gold); }
.btn-cyan   { background: var(--gradient-main); color: white; box-shadow: var(--shadow-glow-cyan); }
.btn-purple { background: linear-gradient(135deg, var(--purple), #9333EA); color: white; box-shadow: 0 4px 20px rgba(124,58,237,0.3); }

.btn-gold:hover   { transform: translateY(-2px); box-shadow: 0 12px 32px rgba(245,159,11,0.35); }
.btn-cyan:hover   { transform: translateY(-2px); box-shadow: 0 12px 32px rgba(14,165,233,0.35); }
.btn-purple:hover { transform: translateY(-2px); box-shadow: 0 12px 32px rgba(124,58,237,0.4); }

/* ─── 8. REVIEWS 섹션 ─── */
.reviews-section {
  background: var(--bg-primary); position: relative; overflow: hidden;
}

/* 배경 장식 */
.reviews-section::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent, rgba(14,165,233,0.2), transparent);
}

.reviews-slider-wrap {
  position: relative; display: flex; align-items: center; gap: 16px;
}
.reviews-slider {
  display: flex; gap: 24px; overflow: hidden; scroll-behavior: smooth; width: 100%;
}

.review-card {
  background: var(--bg-card); border: 1px solid var(--border-card);
  border-radius: var(--radius-xl); padding: 32px;
  min-width: calc(50% - 12px); flex-shrink: 0;
  box-shadow: var(--shadow-sm); transition: var(--transition-base);
  display: flex; flex-direction: column; gap: 16px;
}
.review-card:hover { box-shadow: var(--shadow-hover); border-color: rgba(14,165,233,0.15); transform: translateY(-4px); }

.review-header { display: flex; align-items: center; gap: 16px; }
.review-avatar {
  width: 52px; height: 52px; border-radius: 50%;
  background: var(--bg-secondary); border: 1px solid var(--border-card);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.6rem; flex-shrink: 0; box-shadow: var(--shadow-sm);
}
.review-meta strong { display: block; font-size: 0.95rem; font-weight: 700; margin-bottom: 2px; color: var(--text-primary); }
.review-meta span   { display: block; font-size: 0.78rem; color: var(--text-secondary); margin-bottom: 6px; }
.review-stars { color: var(--gold); font-size: 0.82rem; display: flex; gap: 2px; }

.review-text {
  font-size: 0.9rem; color: var(--text-secondary); line-height: 1.8;
  border-left: 3px solid var(--cyan-light); padding-left: 16px;
  font-style: italic;
}

.slider-btn {
  width: 44px; height: 44px; border-radius: 50%;
  background: var(--bg-card); border: 1px solid var(--border-card);
  color: var(--text-secondary); font-size: 0.9rem;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0; transition: var(--transition-base);
  box-shadow: var(--shadow-sm);
}
.slider-btn:hover { color: var(--cyan); border-color: var(--cyan); background: var(--cyan-light); box-shadow: var(--shadow-hover); }

.slider-dots { display: flex; justify-content: center; gap: 8px; margin-top: 24px; }
.dot { width: 8px; height: 8px; border-radius: 50%; background: var(--border-card); cursor: pointer; transition: var(--transition-base); }
.dot.active { width: 24px; border-radius: 4px; background: var(--cyan); }

/* ─── 9. CONTACT 섹션 ─── */
.contact-section { background: var(--bg-secondary); position: relative; }

.contact-layout {
  display: grid; grid-template-columns: 1fr 1.6fr;
  gap: 64px; align-items: start;
}

.contact-info { display: flex; flex-direction: column; gap: 28px; }
.contact-info-item { display: flex; align-items: flex-start; gap: 18px; }

.contact-icon-wrap {
  width: 48px; height: 48px; border-radius: var(--radius-md);
  background: var(--cyan-light); display: flex; align-items: center; justify-content: center;
  color: var(--cyan); font-size: 1.1rem; flex-shrink: 0; box-shadow: var(--shadow-sm);
}

.contact-info-item h4 {
  font-size: 0.78rem; font-weight: 700; color: var(--text-muted);
  letter-spacing: 0.08em; text-transform: uppercase; margin-bottom: 4px;
}
.contact-info-item a,
.contact-info-item p { font-size: 0.95rem; color: var(--text-secondary); line-height: 1.6; }
.contact-info-item a:hover { color: var(--cyan); }

.quick-contact {
  background: var(--bg-card); border: 1px solid var(--border-card);
  border-radius: var(--radius-lg); padding: 24px; box-shadow: var(--shadow-sm);
}
.quick-contact p {
  font-size: 0.82rem; font-weight: 600; color: var(--text-muted);
  text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 14px;
}
.quick-contact-btns { display: flex; flex-direction: column; gap: 10px; }
.quick-btn {
  display: flex; align-items: center; justify-content: center; gap: 8px;
  font-size: 0.88rem; font-weight: 700; padding: 12px;
  border-radius: var(--radius-md); transition: var(--transition-base);
}
.quick-email { background: var(--gold-light); color: #92400E; }
.quick-email:hover { background: #FDE68A; transform: translateY(-2px); box-shadow: var(--shadow-gold); }
.quick-phone { background: var(--cyan-light); color: var(--cyan-dark); }
.quick-phone:hover { background: #BAE6FD; transform: translateY(-2px); box-shadow: var(--shadow-glow-cyan); }

/* 문의 폼 */
.contact-form-wrap {
  background: var(--bg-card); border: 1px solid var(--border-card);
  border-radius: var(--radius-xl); padding: 40px; box-shadow: var(--shadow-md);
}
.contact-form { display: flex; flex-direction: column; gap: 20px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { display: flex; flex-direction: column; gap: 8px; }
.form-group label { font-size: 0.82rem; font-weight: 600; color: var(--text-secondary); }
.required { color: #EF4444; margin-left: 2px; }

.contact-form input,
.contact-form select,
.contact-form textarea {
  width: 100%; background: var(--bg-secondary);
  border: 1px solid var(--border-card); border-radius: var(--radius-md);
  padding: 12px 16px; color: var(--text-primary);
  font-family: var(--font-kr); font-size: 0.9rem;
  transition: var(--transition-base); outline: none;
  appearance: none; -webkit-appearance: none;
}
.contact-form input::placeholder,
.contact-form textarea::placeholder { color: var(--text-muted); }
.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
  border-color: var(--cyan); background: var(--bg-primary);
  box-shadow: 0 0 0 3px var(--cyan-light);
}

.contact-form select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%2394A3B8' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 14px center;
  padding-right: 40px; cursor: pointer;
}
.contact-form select option { background: white; color: var(--text-primary); }
.contact-form textarea { resize: vertical; min-height: 120px; }

.btn-submit {
  display: flex; align-items: center; justify-content: center; gap: 10px;
  font-family: var(--font-kr); font-size: 1rem; font-weight: 700; color: white;
  background: var(--gradient-main); padding: 16px; border-radius: var(--radius-md);
  border: none; cursor: pointer; transition: var(--transition-base);
  box-shadow: var(--shadow-glow-cyan);
}
.btn-submit:hover { transform: translateY(-2px); box-shadow: 0 12px 32px rgba(14,165,233,0.35); }

.form-notice {
  font-size: 0.75rem; color: var(--text-muted);
  display: flex; align-items: center; gap: 6px; justify-content: center;
}

.form-success { text-align: center; padding: 48px 24px; }
.success-icon { font-size: 3rem; color: var(--cyan); margin-bottom: 16px; }
.form-success h4 { font-size: 1.3rem; font-weight: 800; margin-bottom: 8px; color: var(--text-primary); }
.form-success p  { color: var(--text-secondary); }

/* ─── 10. FOOTER ─── */
.site-footer {
  background: var(--bg-footer);
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 60px 0 0;
}

.footer-inner {
  display: grid; grid-template-columns: 2fr 1fr 1fr;
  gap: 48px; padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.footer-logo {
  font-size: 1.4rem; font-weight: 800; color: white;
  display: block; margin-bottom: 12px;
}
.footer-brand p { font-size: 0.85rem; color: rgba(255,255,255,0.4); line-height: 1.7; max-width: 280px; }

.footer-links h5,
.footer-contact h5 {
  font-size: 0.72rem; font-weight: 700; letter-spacing: 0.1em;
  text-transform: uppercase; color: rgba(255,255,255,0.35); margin-bottom: 16px;
}
.footer-links { display: flex; flex-direction: column; gap: 4px; }
.footer-links a { font-size: 0.88rem; color: rgba(255,255,255,0.5); padding: 4px 0; transition: var(--transition-base); }
.footer-links a:hover { color: var(--cyan); }

.footer-contact { display: flex; flex-direction: column; gap: 4px; }
.footer-contact a {
  display: flex; align-items: center; gap: 8px;
  font-size: 0.85rem; color: rgba(255,255,255,0.5); padding: 4px 0; transition: var(--transition-base);
}
.footer-contact a:hover { color: var(--cyan); }

.footer-bottom {
  display: flex; align-items: center; justify-content: space-between;
  padding: 20px 0; flex-wrap: wrap; gap: 8px;
}
.footer-bottom p { font-size: 0.8rem; color: rgba(255,255,255,0.25); }

/* ─── 11. 스크롤 탑 버튼 ─── */
.scroll-top-btn {
  position: fixed; bottom: 32px; right: 32px;
  width: 48px; height: 48px; border-radius: 50%;
  background: var(--gradient-main); color: white; font-size: 1rem;
  display: flex; align-items: center; justify-content: center;
  box-shadow: var(--shadow-glow-cyan); z-index: 900;
  opacity: 0; visibility: hidden; transition: var(--transition-base);
  transform: translateY(10px);
}
.scroll-top-btn.visible { opacity: 1; visibility: visible; transform: translateY(0); }
.scroll-top-btn:hover { transform: translateY(-4px); box-shadow: 0 12px 32px rgba(14,165,233,0.4); }

/* ─── 12. 스크롤바 ─── */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--bg-secondary); }
::-webkit-scrollbar-thumb { background: rgba(14,165,233,0.25); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: rgba(14,165,233,0.45); }

/* ─── 13. 반응형 ─── */
@media (max-width: 1024px) {
  :root { --section-gap: 80px; }
  .about-layout { grid-template-columns: 1fr; }
  .profile-card { position: static; max-width: 380px; margin: 0 auto; }
  .programs-grid { grid-template-columns: 1fr; max-width: 480px; margin: 0 auto; }
  .philosophy-cards { grid-template-columns: repeat(3, 1fr); }
  .contact-layout { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 768px) {
  :root { --section-gap: 64px; }
  .main-nav, .btn-cta-header { display: none; }
  .hamburger { display: flex; }
  .hero-stats { flex-direction: column; gap: 20px; padding: 24px; }
  .stat-divider { width: 80%; height: 1px; }
  .hero-cta-group { flex-direction: column; }
  .btn-primary, .btn-secondary { width: 100%; justify-content: center; }
  .portfolio-grid { grid-template-columns: 1fr; }
  .philosophy-cards { grid-template-columns: 1fr; }
  .review-card { min-width: 100%; }
  .slider-btn { display: none; }
  .form-row { grid-template-columns: 1fr; }
  .contact-form-wrap { padding: 24px; }
  .footer-inner { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .scroll-top-btn { bottom: 20px; right: 20px; }
}

@media (max-width: 480px) {
  .section-title { font-size: 1.8rem; }
  .hero-title { font-size: 2rem; }
  .portfolio-filters { justify-content: flex-start; overflow-x: auto; flex-wrap: nowrap; padding-bottom: 8px; }
  .filter-btn { white-space: nowrap; }
}