/* ─────────────────────────────────────────────
   Document Check — Toss/Apple 스타일 디자인 토큰
   ───────────────────────────────────────────── */
:root {
  --bg: #F2F4F6;            /* Toss gray 100 */
  --surface: #FFFFFF;
  --ink: #191F28;           /* Toss gray 900 */
  --ink-2: #4E5968;         /* Toss gray 600 */
  --ink-3: #8B95A1;         /* Toss gray 400 */
  --line: #E5E8EB;          /* Toss gray 200 */
  --blue: #3182F6;          /* Toss blue */
  --blue-press: #1B64DA;
  --blue-soft: #E8F3FF;
  --green: #04B014;
  --green-soft: #EAF8EC;
  --violet: #7048E8;
  --violet-soft: #F1EDFD;
  --shadow-card: 0 2px 10px rgba(25, 31, 40, 0.05), 0 12px 40px rgba(25, 31, 40, 0.06);
  --shadow-nav: 0 1px 0 rgba(25, 31, 40, 0.04);
  --r-xl: 28px;
  --r-lg: 20px;
  --r-md: 14px;
}
:root[data-theme="dark"] {
  --bg: #101013;
  --surface: #1B1C1F;
  --ink: #ECEEF0;
  --ink-2: #9BA1A9;
  --ink-3: #6B7178;
  --line: #2B2D31;
  --blue: #4E92F9;
  --blue-press: #6DA5FA;
  --blue-soft: #1C2A3F;
  --green: #3ECF52;
  --green-soft: #16281A;
  --violet: #9377EE;
  --violet-soft: #241E38;
  --shadow-card: 0 2px 10px rgba(0, 0, 0, 0.35), 0 16px 48px rgba(0, 0, 0, 0.4);
  --shadow-nav: 0 1px 0 rgba(255, 255, 255, 0.05);
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #101013;
    --surface: #1B1C1F;
    --ink: #ECEEF0;
    --ink-2: #9BA1A9;
    --ink-3: #6B7178;
    --line: #2B2D31;
    --blue: #4E92F9;
    --blue-press: #6DA5FA;
    --blue-soft: #1C2A3F;
    --green: #3ECF52;
    --green-soft: #16281A;
    --violet: #9377EE;
    --violet-soft: #241E38;
    --shadow-card: 0 2px 10px rgba(0, 0, 0, 0.35), 0 16px 48px rgba(0, 0, 0, 0.4);
    --shadow-nav: 0 1px 0 rgba(255, 255, 255, 0.05);
  }
}

* { box-sizing: border-box; }
html { color-scheme: light dark; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "Pretendard Variable", Pretendard, -apple-system, BlinkMacSystemFont,
    "Apple SD Gothic Neo", "Segoe UI", "Malgun Gothic", sans-serif;
  -webkit-font-smoothing: antialiased;
  font-feature-settings: "tnum" 1;
  line-height: 1.5;
}
button { font-family: inherit; }
:focus-visible { outline: 2.5px solid var(--blue); outline-offset: 3px; border-radius: 8px; }
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; animation: none !important; }
}

/* ── 상단 내비게이션 ── */
.topnav {
  position: sticky; top: 0; z-index: 20;
  background: color-mix(in srgb, var(--surface) 82%, transparent);
  backdrop-filter: blur(18px) saturate(1.6);
  -webkit-backdrop-filter: blur(18px) saturate(1.6);
  box-shadow: var(--shadow-nav);
}
.topnav-inner {
  max-width: 680px; margin: 0 auto; padding: 0 24px;
  height: 60px; display: flex; align-items: center; justify-content: space-between; gap: 16px;
}
.brand {
  display: flex; align-items: center; gap: 9px;
  font-size: 16px; font-weight: 800; letter-spacing: -0.02em;
  color: var(--ink); text-decoration: none;
}
.brand-mark { width: 24px; height: 24px; color: var(--blue); display: flex; }
.brand-mark svg { width: 100%; height: 100%; }

.nav-tabs { display: flex; gap: 6px; }
.nav-tab {
  border: none; background: none; cursor: pointer;
  font-size: 13.5px; font-weight: 600; color: var(--ink-3);
  padding: 8px 14px; border-radius: 999px;
  transition: background 0.15s ease, color 0.15s ease;
}
.nav-tab.is-active { background: var(--blue-soft); color: var(--blue); }
.nav-tab.is-soon { cursor: default; }
.soon-badge {
  font-size: 10.5px; font-weight: 700; color: var(--ink-3);
  background: var(--bg); border-radius: 999px; padding: 2px 7px; margin-left: 2px;
}

/* ── 본문 ── */
.main { max-width: 680px; margin: 0 auto; padding: 0 24px 72px; }

.hero { padding: 64px 4px 40px; }
.hero h1 {
  font-size: 40px; font-weight: 800; letter-spacing: -0.035em; line-height: 1.22;
  margin: 0 0 18px; text-wrap: balance;
}
.hero-sub { font-size: 16.5px; color: var(--ink-2); margin: 0; line-height: 1.65; }
.mobile-br { display: none; }

/* ── 업로드 카드 ── */
.card {
  background: var(--surface);
  border-radius: var(--r-xl);
  box-shadow: var(--shadow-card);
}
.upload-card { padding: 28px; margin-bottom: 56px; }

.dropzone {
  border: 2px dashed var(--line);
  border-radius: var(--r-lg);
  padding: 52px 24px;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.18s ease, background 0.18s ease;
}
.dropzone:hover, .dropzone.is-dragover {
  border-color: var(--blue);
  background: var(--blue-soft);
}
.dz-icon {
  width: 56px; height: 56px; margin: 0 auto 16px;
  background: var(--blue-soft); color: var(--blue);
  border-radius: 50%; display: flex; align-items: center; justify-content: center;
  transition: transform 0.18s ease;
}
.dropzone.is-dragover .dz-icon { transform: translateY(-3px) scale(1.06); }
.dz-icon svg { width: 26px; height: 26px; }
.dz-title { font-size: 17px; font-weight: 700; margin: 0 0 6px; letter-spacing: -0.01em; }
.dz-sub { font-size: 14px; color: var(--ink-3); margin: 0; }

/* ── 파일 목록 ── */
.filelist { list-style: none; margin: 18px 0 0; padding: 0; display: flex; flex-direction: column; gap: 8px; }
.filelist li {
  display: flex; align-items: center; gap: 12px;
  background: var(--bg); border-radius: var(--r-md);
  padding: 13px 16px; font-size: 14px;
  animation: file-in 0.22s ease;
}
@keyframes file-in {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: none; }
}
.f-icon {
  width: 34px; height: 34px; flex-shrink: 0;
  background: var(--surface); color: var(--blue);
  border-radius: 10px; display: flex; align-items: center; justify-content: center;
  box-shadow: 0 1px 3px rgba(25, 31, 40, 0.06);
}
.f-icon svg { width: 16px; height: 16px; }
.f-name { flex: 1; min-width: 0; font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; letter-spacing: -0.01em; }
.f-size { color: var(--ink-3); font-size: 12.5px; flex-shrink: 0; font-variant-numeric: tabular-nums; }
.f-remove {
  width: 26px; height: 26px; flex-shrink: 0;
  border: none; background: none; color: var(--ink-3); cursor: pointer;
  border-radius: 50%; display: flex; align-items: center; justify-content: center;
  transition: background 0.14s ease, color 0.14s ease;
}
.f-remove:hover { background: var(--line); color: var(--ink); }
.f-remove svg { width: 12px; height: 12px; }

/* ── CTA 버튼 (토스식 풀사이즈) ── */
.cta {
  width: 100%; margin-top: 20px;
  background: var(--blue); color: #fff;
  border: none; border-radius: var(--r-md);
  padding: 17px; font-size: 16.5px; font-weight: 700; letter-spacing: -0.01em;
  cursor: pointer;
  transition: background 0.15s ease, transform 0.12s ease;
}
.cta:hover:not(:disabled) { background: var(--blue-press); }
.cta:active:not(:disabled) { transform: scale(0.985); }
.cta:disabled {
  background: var(--bg); color: var(--ink-3); cursor: not-allowed;
}
.status-note { min-height: 20px; margin: 12px 2px 0; font-size: 13.5px; color: var(--ink-3); text-align: center; }

/* ── 과정 소개 ── */
.steps { display: flex; flex-direction: column; gap: 10px; }
.step {
  display: flex; gap: 16px; align-items: flex-start;
  background: var(--surface); border-radius: var(--r-lg);
  padding: 22px 24px; box-shadow: var(--shadow-card);
}
.step-icon {
  width: 44px; height: 44px; flex-shrink: 0; border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
}
.step-icon svg { width: 22px; height: 22px; }
.step-icon.blue { background: var(--blue-soft); color: var(--blue); }
.step-icon.green { background: var(--green-soft); color: var(--green); }
.step-icon.violet { background: var(--violet-soft); color: var(--violet); }
.step h3 { margin: 2px 0 5px; font-size: 15.5px; font-weight: 700; letter-spacing: -0.01em; }
.step p { margin: 0; font-size: 13.5px; color: var(--ink-2); line-height: 1.6; }

.foot { margin-top: 48px; text-align: center; }
.foot p { font-size: 12.5px; color: var(--ink-3); margin: 0; }

@media (max-width: 560px) {
  .hero { padding: 44px 2px 32px; }
  .hero h1 { font-size: 31px; }
  .hero-sub { font-size: 15px; }
  .mobile-br { display: inline; }
  .upload-card { padding: 18px; }
  .dropzone { padding: 40px 18px; }
  .nav-tabs { display: none; }
}