/* ══════════════════════════════════════════════════════
   Driver Center — Premium 스타일시트
   supanova-design-skill 기반 전면 리디자인
   기존 class명 유지 / JS 의존성 보존
══════════════════════════════════════════════════════ */

/* ── 애니메이션 키프레임 ─────────────────────────────── */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(28px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

/* ── CSS 변수 ────────────────────────────────────────── */
:root {
  --drv-bg:         #ffffff;
  --drv-card:       #ffffff;
  --drv-card2:      #f8fafc;
  --drv-border:     #e2e8f0;
  --drv-accent:     #2563eb;
  --drv-accent-h:   #1d4ed8;
  --drv-accent-bg:  rgba(37,99,235,.06);
  --drv-green:      #16a34a;
  --drv-yellow:     #d97706;
  --drv-red:        #dc2626;
  --drv-purple:     #7c3aed;
  --drv-text:       #1e293b;
  --drv-sub:        #64748b;
  --drv-dim:        #94a3b8;
  --drv-radius:     14px;
  --drv-radius-s:   8px;
  --drv-shadow-sm:  0 1px 3px rgba(0,0,0,.05), 0 1px 2px rgba(0,0,0,.03);
  --drv-shadow:     0 4px 16px rgba(37,99,235,.09), 0 2px 4px rgba(0,0,0,.04);
  --drv-shadow-lg:  0 16px 48px rgba(37,99,235,.13), 0 4px 16px rgba(0,0,0,.07);
  --drv-spring:     cubic-bezier(0.16, 1, 0.3, 1);
}

/* ── 기본 리셋 ───────────────────────────────────────── */
.drv-wrap *, .drv-wrap *::before, .drv-wrap *::after { box-sizing: border-box; }

.drv-wrap {
  font-family: 'Pretendard', 'Malgun Gothic', '맑은 고딕', sans-serif;
  color: var(--drv-text);
  background: var(--drv-bg);
  min-height: 100vh;
  padding: 0 0 80px;
  word-break: keep-all;
}

.drv-wrap a { color: var(--drv-accent); text-decoration: none; }
.drv-wrap a:hover { text-decoration: underline; }

/* ── 노이즈 텍스처 오버레이 (fixed, pointer-events-none) */
.drv-noise {
  position: fixed;
  inset: 0;
  z-index: 60;
  pointer-events: none;
  opacity: .022;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-size: 200px 200px;
}

/* ── 탭 네비게이션 (sticky, glass) ──────────────────── */
.drv-tabs {
  position: sticky;
  top: 0;
  z-index: 40;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  padding: 0;
  gap: 0;
  background: rgba(255,255,255,.96);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--drv-border);
  overflow-x: auto;
  scrollbar-width: none;
}
.drv-tabs::-webkit-scrollbar { display: none; }

.drv-tab {
  padding: 15px 22px;
  background: transparent;
  border: none;
  border-bottom: 2.5px solid transparent;
  color: var(--drv-sub);
  font-size: 13px;
  font-weight: 500;
  font-family: 'Pretendard', sans-serif;
  cursor: pointer;
  white-space: nowrap;
  margin-bottom: -1px;
  transition: color 0.22s var(--drv-spring), border-color 0.22s var(--drv-spring);
}
.drv-tab:hover { color: var(--drv-text); }
.drv-tab.active {
  color: var(--drv-accent);
  border-bottom-color: var(--drv-accent);
  font-weight: 600;
}

/* ── 패널 ───────────────────────────────────────────── */
.drv-panel { display: none; }
.drv-panel.active { display: block; animation: fadeIn 0.25s ease; }

/* ── 히어로 (Split Layout) ────────────────────────── */
.drv-hero {
  position: relative;
  overflow: hidden;
  background: #ffffff;
  border-bottom: 1px solid var(--drv-border);
  padding: 0;
}

/* Split grid */
.drv-hero__inner {
  display: grid;
  grid-template-columns: 55% 1fr;
  gap: 56px;
  align-items: center;
  padding: 68px 0 76px;
}

/* 왼쪽 텍스트 */
.drv-hero__left { display: flex; flex-direction: column; }

.drv-hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 14px;
  background: rgba(37,99,235,.08);
  border: 1px solid rgba(37,99,235,.2);
  border-radius: 100px;
  font-size: 11px;
  font-weight: 700;
  color: var(--drv-accent);
  margin-bottom: 22px;
  letter-spacing: .08em;
  text-transform: uppercase;
  animation: fadeInUp 0.5s var(--drv-spring) both;
}

.drv-hero__title {
  font-size: clamp(32px, 4vw, 52px);
  font-weight: 800;
  line-height: 1.14;
  letter-spacing: -.025em;
  margin: 0 0 20px;
  color: var(--drv-text);
  text-wrap: balance;
  animation: fadeInUp 0.55s var(--drv-spring) 0.06s both;
}
.drv-hero__title .hl {
  background: linear-gradient(135deg, #2563eb 0%, #4f46e5 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.drv-hero__sub {
  font-size: 15.5px;
  color: var(--drv-sub);
  line-height: 1.78;
  margin: 0 0 32px;
  max-width: 46ch;
  animation: fadeInUp 0.55s var(--drv-spring) 0.12s both;
}

.drv-hero__trust {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  animation: fadeInUp 0.55s var(--drv-spring) 0.18s both;
}
.drv-trust-pill {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 5px 13px;
  background: var(--drv-card);
  border: 1px solid var(--drv-border);
  border-radius: 100px;
  font-size: 12px;
  font-weight: 500;
  color: var(--drv-sub);
  box-shadow: var(--drv-shadow-sm);
}
.drv-trust-pill--green {
  color: var(--drv-green);
  border-color: rgba(22,163,74,.25);
  background: rgba(22,163,74,.05);
}

/* 오른쪽 다운로드 카드 */
.drv-hero__right {
  animation: fadeInUp 0.65s var(--drv-spring) 0.15s both;
}

.drv-download-card {
  background: var(--drv-card);
  border: 1px solid var(--drv-border);
  border-radius: var(--drv-radius);
  padding: 32px;
  box-shadow: var(--drv-shadow-lg);
  transition: transform 0.4s var(--drv-spring), box-shadow 0.4s var(--drv-spring);
}
.drv-download-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 28px 72px rgba(37,99,235,.15), 0 8px 24px rgba(0,0,0,.07);
}

.drv-download-card__icon {
  width: 56px; height: 56px;
  background: var(--drv-accent-bg);
  border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 20px;
  border: 1px solid rgba(37,99,235,.15);
}
.drv-download-card__icon svg { width: 28px; height: 28px; color: var(--drv-accent); }

.drv-download-card h3 {
  font-size: 19px; font-weight: 700;
  margin: 0 0 6px; letter-spacing: -.01em;
}
.drv-download-card__desc {
  font-size: 13px; color: var(--drv-sub);
  margin: 0 0 22px; line-height: 1.65;
}

.drv-download-steps {
  display: flex; flex-direction: column; gap: 10px;
  margin-bottom: 22px;
  padding: 16px 18px;
  background: var(--drv-card2);
  border-radius: var(--drv-radius-s);
  border: 1px solid var(--drv-border);
}
.drv-download-step {
  display: flex; align-items: center; gap: 10px;
  font-size: 13px; color: var(--drv-sub);
}
.drv-download-step__num {
  width: 22px; height: 22px; flex-shrink: 0;
  background: var(--drv-accent); color: #fff;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 11px;
}

.drv-download-card__actions { display: flex; flex-direction: column; gap: 8px; }
.drv-download-card__meta {
  margin-top: 14px;
  font-size: 11px; color: var(--drv-dim);
  text-align: center; line-height: 1.7;
}

/* ── 버튼 ───────────────────────────────────────────── */
.drv-btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 11px 22px;
  border-radius: var(--drv-radius-s);
  font-size: 14px; font-weight: 600;
  font-family: 'Pretendard', sans-serif;
  border: none; cursor: pointer;
  text-decoration: none !important;
  transition: all 0.35s var(--drv-spring);
}
.drv-btn:active { transform: scale(.96) !important; }

.drv-wrap .drv-btn--primary {
  background: var(--drv-accent);
  color: #fff;
  box-shadow: 0 2px 8px rgba(37,99,235,.28);
}
.drv-wrap .drv-btn--primary:hover {
  background: var(--drv-accent-h);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(37,99,235,.36);
  text-decoration: none;
}

.drv-wrap .drv-btn--ghost {
  background: transparent;
  border: 1.5px solid var(--drv-border);
  color: var(--drv-text);
}
.drv-btn--ghost:hover {
  border-color: var(--drv-accent);
  color: var(--drv-accent);
  background: var(--drv-accent-bg);
  transform: translateY(-1px);
  text-decoration: none;
}

.drv-btn--lg { padding: 13px 28px; font-size: 15px; }
.drv-btn--full { width: 100%; }
.drv-btn svg { width: 17px; height: 17px; flex-shrink: 0; }

/* ── 섹션 ───────────────────────────────────────────── */
.drv-section { padding: 52px 0; }
.drv-section--dark {
  background: #ffffff;
  border-top: 1px solid var(--drv-border);
  border-bottom: 1px solid var(--drv-border);
}

.drv-section__title {
  font-size: 21px; font-weight: 700;
  margin: 0 0 8px;
  display: flex; align-items: center; gap: 10px;
  letter-spacing: -.015em;
}
.drv-section__desc {
  font-size: 14px; color: var(--drv-sub);
  margin: 0 0 28px; line-height: 1.7;
}

/* ── 배지 ───────────────────────────────────────────── */
.drv-badge {
  font-size: 10px; font-weight: 700;
  padding: 3px 9px; border-radius: 100px;
  letter-spacing: .07em; text-transform: uppercase;
}
.drv-badge--blue   { background: rgba(37,99,235,.1);  color: var(--drv-accent); border: 1px solid rgba(37,99,235,.2); }
.drv-badge--green  { background: rgba(22,163,74,.1);  color: var(--drv-green);  border: 1px solid rgba(22,163,74,.2); }
.drv-badge--yellow { background: rgba(217,119,6,.1);  color: var(--drv-yellow); border: 1px solid rgba(217,119,6,.2); }

/* ── WebGL 감지 카드 ────────────────────────────────── */
.drv-webgl-card {
  display: flex; align-items: center; gap: 20px;
  background: var(--drv-card);
  border: 1px solid var(--drv-border);
  border-radius: var(--drv-radius);
  padding: 26px 30px; margin-bottom: 18px;
  box-shadow: var(--drv-shadow-sm);
  transition: box-shadow 0.3s var(--drv-spring), transform 0.3s var(--drv-spring);
}
.drv-webgl-card:hover { box-shadow: var(--drv-shadow); transform: translateY(-1px); }

.drv-webgl-card__icon {
  width: 52px; height: 52px;
  background: var(--drv-accent-bg);
  border: 1px solid rgba(37,99,235,.15);
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-size: 24px; flex-shrink: 0;
}
.drv-webgl-card__body { flex: 1; }
.drv-webgl-card__label { font-size: 10px; color: var(--drv-sub); text-transform: uppercase; letter-spacing: .07em; margin-bottom: 4px; font-weight: 600; }
.drv-webgl-card__value { font-size: 20px; font-weight: 700; margin: 4px 0; letter-spacing: -.01em; }
.drv-webgl-card__meta  { font-size: 12px; color: var(--drv-dim); }
.drv-webgl-card__action { flex-shrink: 0; }

/* ── 시스템 정보 그리드 ─────────────────────────────── */
.drv-sysinfo-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(155px, 1fr));
  gap: 10px;
}
.drv-sysinfo-item {
  background: var(--drv-card);
  border: 1px solid var(--drv-border);
  border-radius: var(--drv-radius-s);
  padding: 15px 18px;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.drv-sysinfo-item:hover { border-color: rgba(37,99,235,.3); box-shadow: var(--drv-shadow-sm); }
.drv-sysinfo-item__label { font-size: 10px; color: var(--drv-sub); display: block; margin-bottom: 5px; text-transform: uppercase; letter-spacing: .06em; font-weight: 600; }
.drv-sysinfo-item__value { font-size: 14px; font-weight: 600; }

/* ── EXE 플로우 ─────────────────────────────────────── */
.drv-exe-flow {
  display: flex; align-items: stretch; gap: 12px;
  flex-wrap: wrap; margin-bottom: 32px;
}
.drv-exe-step {
  display: flex; align-items: flex-start; gap: 14px;
  background: var(--drv-card);
  border: 1px solid var(--drv-border);
  border-radius: var(--drv-radius);
  padding: 20px 22px;
  flex: 1; min-width: 160px;
  box-shadow: var(--drv-shadow-sm);
  transition: box-shadow 0.3s var(--drv-spring), transform 0.3s var(--drv-spring);
}
.drv-exe-step:hover { box-shadow: var(--drv-shadow); transform: translateY(-2px); }

.drv-exe-step__num {
  width: 34px; height: 34px; flex-shrink: 0;
  background: var(--drv-accent); color: #fff;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-weight: 800; font-size: 15px;
}
.drv-exe-step__text { font-size: 13px; line-height: 1.65; padding-top: 4px; }
.drv-exe-step__arrow { color: var(--drv-dim); font-size: 20px; flex-shrink: 0; align-self: center; }

.drv-exe-download { text-align: center; }
.drv-exe-trust {
  display: flex; justify-content: center; gap: 20px; flex-wrap: wrap;
  margin-top: 14px;
  font-size: 12px; color: var(--drv-green); font-weight: 500;
}

/* ── 수동 검색 ──────────────────────────────────────── */
.drv-search-box { display: flex; gap: 10px; margin-bottom: 24px; }
.drv-search-input {
  flex: 1;
  background: var(--drv-card);
  border: 1.5px solid var(--drv-border);
  border-radius: var(--drv-radius-s);
  color: var(--drv-text);
  font-size: 15px; font-family: 'Pretendard', sans-serif;
  padding: 12px 16px; outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.drv-search-input:focus {
  border-color: var(--drv-accent);
  box-shadow: 0 0 0 3px rgba(37,99,235,.1);
}
.drv-search-input::placeholder { color: var(--drv-dim); }

.drv-manual-results { margin-bottom: 28px; }
.drv-result-card {
  background: var(--drv-card);
  border: 1px solid var(--drv-border);
  border-radius: var(--drv-radius-s);
  padding: 18px 22px; margin-bottom: 8px;
  display: flex; align-items: center; gap: 16px;
  box-shadow: var(--drv-shadow-sm);
  transition: border-color 0.2s, box-shadow 0.25s;
}
.drv-result-card:hover { border-color: rgba(37,99,235,.35); box-shadow: var(--drv-shadow); }
.drv-result-card__vendor { font-size: 10px; color: var(--drv-sub); text-transform: uppercase; letter-spacing: .06em; font-weight: 600; }
.drv-result-card__name   { font-size: 15px; font-weight: 600; margin: 3px 0; letter-spacing: -.01em; }
.drv-result-card__note   { font-size: 12px; color: var(--drv-dim); }
.drv-result-card__link   { margin-left: auto; flex-shrink: 0; }

.drv-quick-select__title { font-size: 11px; color: var(--drv-sub); text-transform: uppercase; letter-spacing: .08em; margin-bottom: 10px; font-weight: 700; }
.drv-quick-chips { display: flex; flex-wrap: wrap; gap: 8px; }
.drv-chip {
  padding: 7px 16px;
  background: var(--drv-card);
  border: 1.5px solid var(--drv-border);
  border-radius: 100px;
  color: var(--drv-text);
  font-size: 13px; font-family: 'Pretendard', sans-serif;
  cursor: pointer;
  transition: all 0.25s var(--drv-spring);
}
.drv-chip:hover {
  border-color: var(--drv-accent);
  color: var(--drv-accent);
  background: var(--drv-accent-bg);
  transform: translateY(-1px);
}

/* ── 드라이버 디렉토리 ──────────────────────────────── */
.drv-dir-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}
.drv-dir-card {
  background: var(--drv-card);
  border: 1px solid var(--drv-border);
  border-radius: var(--drv-radius);
  overflow: hidden;
  box-shadow: var(--drv-shadow-sm);
  transition: box-shadow 0.3s var(--drv-spring), transform 0.3s var(--drv-spring);
}
.drv-dir-card:hover { box-shadow: var(--drv-shadow); transform: translateY(-2px); }

.drv-dir-card__vendor {
  padding: 12px 18px;
  font-size: 12px; font-weight: 700;
  letter-spacing: .06em; text-transform: uppercase;
}
.drv-dir-card__vendor--nvidia { background: rgba(118,185,0,.1);   color: #4a7c00; }
.drv-dir-card__vendor--amd    { background: rgba(220,38,38,.08);  color: #b91c1c; }
.drv-dir-card__vendor--intel  { background: rgba(0,113,197,.08);  color: #0369a1; }
.drv-dir-card__vendor--realtek{ background: rgba(217,119,6,.08);  color: #b45309; }
.drv-dir-card__vendor--mb     { background: rgba(124,58,237,.08); color: var(--drv-purple); }
.drv-dir-card__vendor--etc    { background: var(--drv-card2);     color: var(--drv-sub); }

.drv-dir-list { list-style: none; margin: 0; padding: 8px 0; }
.drv-dir-list li a {
  display: block;
  padding: 9px 18px;
  font-size: 13px; color: var(--drv-sub);
  transition: background 0.15s, color 0.15s, padding-left 0.2s var(--drv-spring);
}
.drv-dir-list li a:hover {
  background: rgba(37,99,235,.04);
  color: var(--drv-accent);
  padding-left: 24px;
  text-decoration: none;
}

/* ── 유틸리티 그리드 ────────────────────────────────── */
.drv-util-category {
  font-size: 12px; font-weight: 700;
  color: var(--drv-sub);
  text-transform: uppercase; letter-spacing: .08em;
  margin: 36px 0 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--drv-border);
}
.drv-util-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 10px;
}
.drv-util-card {
  display: block;
  background: var(--drv-card);
  border: 1.5px solid var(--drv-border);
  border-radius: var(--drv-radius-s);
  padding: 18px 20px;
  position: relative; cursor: pointer;
  transition: border-color 0.2s var(--drv-spring), box-shadow 0.2s var(--drv-spring), transform 0.2s var(--drv-spring);
  text-decoration: none !important; color: var(--drv-text);
}
.drv-util-card:hover {
  border-color: var(--drv-accent);
  box-shadow: var(--drv-shadow);
  transform: translateY(-2px);
  text-decoration: none;
}
.drv-util-card--internal { cursor: pointer; }
.drv-util-card__name { font-size: 14px; font-weight: 700; margin-bottom: 6px; letter-spacing: -.01em; }
.drv-util-card__desc { font-size: 12px; color: var(--drv-sub); line-height: 1.55; }

.drv-util-card__badge {
  position: absolute; top: 14px; right: 14px;
  font-size: 10px; font-weight: 600;
  padding: 2px 8px; border-radius: 100px;
  background: rgba(22,163,74,.1);
  color: var(--drv-green);
  border: 1px solid rgba(22,163,74,.2);
}
.drv-util-card__badge--web {
  background: rgba(37,99,235,.08);
  color: var(--drv-accent);
  border-color: rgba(37,99,235,.2);
}
.drv-util-card__badge--trial {
  background: rgba(217,119,6,.08);
  color: var(--drv-yellow);
  border-color: rgba(217,119,6,.2);
}

/* ── 공유폴더 도구 카드 ─────────────────────────────── */
.drv-share-card {
  background: var(--drv-card);
  border: 1px solid rgba(37,99,235,.2);
  border-radius: var(--drv-radius);
  overflow: hidden; margin-top: 4px;
  box-shadow: var(--drv-shadow-sm);
}
.drv-share-card__header {
  display: flex; align-items: center; gap: 16px;
  padding: 22px 28px;
  background: rgba(37,99,235,.04);
  border-bottom: 1px solid var(--drv-border);
  flex-wrap: wrap;
}
.drv-share-card__icon { font-size: 32px; flex-shrink: 0; }
.drv-share-card__title { font-size: 16px; font-weight: 700; margin-bottom: 2px; }
.drv-share-card__sub   { font-size: 13px; color: var(--drv-sub); }

.drv-share-features {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
}
.drv-share-feature {
  display: flex; gap: 14px;
  padding: 20px 28px;
  border-right: 1px solid var(--drv-border);
  border-bottom: 1px solid var(--drv-border);
  transition: background 0.15s;
}
.drv-share-feature:hover { background: rgba(37,99,235,.02); }
.drv-share-feature:last-child { border-right: none; }
.drv-share-feature__num {
  width: 28px; height: 28px; flex-shrink: 0;
  background: var(--drv-accent); color: #fff;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-weight: 800; font-size: 13px;
}
.drv-share-feature strong { font-size: 14px; display: block; margin-bottom: 4px; }
.drv-share-feature p { font-size: 12px; color: var(--drv-sub); margin: 0; line-height: 1.55; }

.drv-share-howto {
  padding: 14px 28px;
  font-size: 12px; color: var(--drv-sub); line-height: 1.7;
  border-top: 1px solid var(--drv-border);
  background: rgba(0,0,0,.04);
}
.drv-share-howto code {
  background: var(--drv-card2); border: 1px solid var(--drv-border);
  border-radius: 4px; padding: 1px 6px;
  font-size: 12px; color: var(--drv-accent); font-family: monospace;
}

/* ── 설치 가이드 ────────────────────────────────────── */
.drv-guide-list { display: flex; flex-direction: column; gap: 14px; }
.drv-guide-item {
  display: flex; gap: 20px;
  background: var(--drv-card);
  border: 1px solid var(--drv-border);
  border-radius: var(--drv-radius);
  padding: 26px 30px;
  box-shadow: var(--drv-shadow-sm);
  transition: box-shadow 0.3s var(--drv-spring), transform 0.3s var(--drv-spring);
}
.drv-guide-item:hover { box-shadow: var(--drv-shadow); transform: translateY(-1px); }

.drv-guide-item__num {
  width: 38px; height: 38px; flex-shrink: 0;
  background: var(--drv-accent); color: #fff;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-weight: 800; font-size: 16px;
}
.drv-guide-item__body h4 { margin: 0 0 12px; font-size: 16px; font-weight: 700; letter-spacing: -.01em; }
.drv-guide-item__body p  { margin: 0 0 10px; font-size: 14px; color: var(--drv-sub); line-height: 1.7; }
.drv-guide-item__body ol { margin: 0 0 10px; padding-left: 18px; }
.drv-guide-item__body li { font-size: 14px; color: var(--drv-sub); margin-bottom: 6px; line-height: 1.7; }
.drv-guide-item__note {
  font-size: 12px; color: var(--drv-green);
  background: rgba(22,163,74,.06);
  border: 1px solid rgba(22,163,74,.2);
  border-radius: 6px; padding: 9px 14px; margin-top: 10px;
}

kbd {
  display: inline-block; padding: 2px 7px;
  background: var(--drv-card2); border: 1px solid var(--drv-border);
  border-radius: 4px; font-size: 12px;
  font-family: monospace; color: var(--drv-text);
}

/* ── 토스트 ─────────────────────────────────────────── */
.drv-toast {
  position: fixed; bottom: 24px; left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--drv-text);
  border-radius: 8px; padding: 10px 22px;
  font-size: 13px; font-weight: 500; color: #fff;
  opacity: 0; pointer-events: none;
  transition: opacity .2s, transform .25s var(--drv-spring);
  z-index: 9999;
}
.drv-toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ── 스크롤 리빌 애니메이션 ─────────────────────────── */
.drv-reveal {
  opacity: 0; transform: translateY(22px);
  transition: opacity 0.55s var(--drv-spring), transform 0.55s var(--drv-spring);
}
.drv-reveal.visible { opacity: 1; transform: translateY(0); }
.drv-reveal-delay-1 { transition-delay: .07s; }
.drv-reveal-delay-2 { transition-delay: .14s; }
.drv-reveal-delay-3 { transition-delay: .21s; }

/* ── 반응형 ─────────────────────────────────────────── */
@media (max-width: 900px) {
  .drv-hero__inner {
    grid-template-columns: 1fr;
    padding: 44px 0 52px;
    gap: 36px;
  }
  .drv-hero__sub { max-width: 100%; }
  .drv-section { padding: 40px 0; }
}

@media (max-width: 600px) {
  .drv-hero__inner { padding: 36px 0 44px; }
  .drv-hero__title { font-size: 28px; }
  .drv-section { padding: 32px 0; }
  .drv-exe-flow { flex-direction: column; }
  .drv-exe-step__arrow { transform: rotate(90deg); display: block; text-align: center; }
  .drv-webgl-card { flex-direction: column; gap: 16px; }
  .drv-download-card { padding: 24px; }
}