/* ==========================================================================
   pcap2ai — 사이트 공통 스타일
   컨셉: Wireshark의 시각 언어(패킷 리스트, 프로토콜 행 색상, 캡처 패널)를
         slate-950 다크 콘솔로 옮긴 엔지니어링 유틸리티 UI.
   서체: IBM Plex Mono(데이터/브랜드) + Pretendard(한글 본문)
   ========================================================================== */

:root {
  --bg: #020617;            /* slate-950 */
  --panel: #0b1120;
  --panel-2: #0f172a;       /* slate-900 */
  --panel-deep: #050b16;    /* 콘솔 로그 배경 */
  --line: #1e293b;          /* slate-800 */
  --line-soft: #162138;
  --text: #cbd5e1;          /* slate-300 */
  --text-strong: #f1f5f9;   /* slate-100 */
  --text-dim: #64748b;      /* slate-500 */
  --accent: #5ea8e8;        /* fin blue — Wireshark 상어 지느러미에서 */
  --accent-strong: #8cc3f4;
  --accent-ink: #06121f;
  --ok: #7dde9c;
  --warn: #e8c46a;
  --danger: #e89b9b;
  /* Wireshark 패킷 리스트 행 색상의 다크 어댑테이션 */
  --row-tcp: #a7b5ee;
  --row-udp: #8fd0e0;
  --row-dns: #93dfba;
  --row-arp: #e3ce96;
  --row-err: #e89b9b;
  --font-mono: "IBM Plex Mono", "Consolas", "SFMono-Regular", monospace;
  --font-sans: "Pretendard Variable", Pretendard, -apple-system, "Segoe UI",
    "Malgun Gothic", sans-serif;
}

html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 15.5px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
::selection { background: rgba(94, 168, 232, 0.35); color: var(--text-strong); }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 4px;
}

.mono { font-family: var(--font-mono); }

.wrap { max-width: 1120px; margin: 0 auto; padding: 0 20px; }

/* --------------------------------------------------------------------------
   헤더
   -------------------------------------------------------------------------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(2, 6, 23, 0.86);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line-soft);
}
.site-header .bar {
  display: flex; align-items: center; justify-content: space-between;
  height: 60px; gap: 16px;
}
.brand {
  display: flex; align-items: baseline; gap: 10px;
  font-family: var(--font-mono); text-decoration: none;
}
.brand .sigil { color: var(--accent); font-weight: 600; font-size: 17px; }
.brand .name { color: var(--text-strong); font-weight: 600; font-size: 17px; letter-spacing: -0.01em; }
.brand .name em { color: var(--accent); font-style: normal; }
.brand .tag {
  color: var(--text-dim); font-size: 11px; letter-spacing: 0.06em;
  display: none;
}
@media (min-width: 640px) { .brand .tag { display: inline; } }
@media (max-width: 600px) {
  .site-header .bar {
    height: auto; flex-direction: column; align-items: flex-start;
    gap: 0; padding: 10px 0 8px;
  }
  .site-nav { margin-left: -9px; }
  .site-nav a { padding: 3px 9px; font-size: 13px; }
}

.site-nav { display: flex; flex-wrap: wrap; gap: 4px; font-size: 13.5px; }
.site-nav a {
  color: var(--text-dim); text-decoration: none; white-space: nowrap;
  padding: 6px 11px; border-radius: 6px;
  transition: color 0.15s, background-color 0.15s;
}
.site-nav a:hover { color: var(--text-strong); background: var(--panel-2); }
.site-nav a[aria-current="page"] { color: var(--accent-strong); }

/* --------------------------------------------------------------------------
   캡처 패널 (시그니처 컴포넌트) — 상태에 따라
   드롭존 → 선택된 파일 → 라이브 변환 콘솔로 변신한다.
   -------------------------------------------------------------------------- */
.pane {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--panel);
  overflow: hidden;
}
.pane-head {
  display: flex; align-items: center; gap: 14px;
  padding: 8px 14px;
  background: var(--panel-2);
  border-bottom: 1px solid var(--line-soft);
  font-family: var(--font-mono);
  font-size: 10.5px; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--text-dim);
  overflow-x: hidden; white-space: nowrap;
}
.pane-head .col-no { width: 44px; }
.pane-head .col-time { width: 84px; }
.pane-head .col-addr { flex: 1 1 120px; min-width: 90px; }
.pane-head .col-proto { width: 64px; }
.pane-head .col-info { flex: 2 1 160px; display: none; }
@media (min-width: 768px) { .pane-head .col-info { display: block; } }

.dropzone {
  position: relative;
  min-height: 232px;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 8px; padding: 28px 20px;
  cursor: pointer;
  transition: background-color 0.18s;
}
.dropzone:hover { background: rgba(94, 168, 232, 0.04); }
.dropzone.dragover {
  background: rgba(94, 168, 232, 0.08);
  box-shadow: inset 0 0 0 2px var(--accent);
}
.dropzone .dz-label {
  position: relative; z-index: 1;
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  padding: 18px 26px; border-radius: 12px;
  background: rgba(2, 6, 23, 0.72);
  backdrop-filter: blur(2px);
  border: 1px dashed var(--line);
}
.dropzone:hover .dz-label, .dropzone.dragover .dz-label { border-color: var(--accent); }
.dropzone .dz-main {
  font-size: 16.5px; font-weight: 600; color: var(--text-strong);
}
.dropzone .dz-sub {
  font-size: 13px; color: var(--text-dim);
  font-family: var(--font-mono); text-align: center;
}
.dropzone .dz-key {
  color: var(--accent);
  border: 1px solid var(--line);
  background: var(--panel-2);
  border-radius: 5px; padding: 1px 7px; font-size: 12px;
}

/* 드롭존 뒤에 깔리는 고스트 패킷 행 — TCP 3-way + IPsec 샘플 */
.ghost-rows {
  position: absolute; inset: 0; padding: 12px 14px;
  display: flex; flex-direction: column; gap: 7px;
  font-family: var(--font-mono); font-size: 11.5px; white-space: nowrap;
  overflow: hidden; opacity: 0.2; pointer-events: none; user-select: none;
}
.ghost-rows .g-tcp { color: var(--row-tcp); }
.ghost-rows .g-udp { color: var(--row-udp); }
.ghost-rows .g-dns { color: var(--row-dns); }
.ghost-rows .g-esp { color: var(--row-arp); }
.ghost-rows .g-err { color: var(--row-err); }

/* 선택된 파일 표시 행 */
.file-row {
  display: flex; align-items: center; gap: 12px;
  padding: 18px 20px;
  font-family: var(--font-mono); font-size: 14px;
}
.file-row .f-icon { color: var(--accent); font-weight: 600; }
.file-row .f-name {
  color: var(--text-strong);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.file-row .f-size { color: var(--text-dim); font-size: 12.5px; flex-shrink: 0; }
.file-row .f-remove {
  margin-left: auto; flex-shrink: 0;
  color: var(--text-dim); background: none; border: 1px solid var(--line);
  border-radius: 6px; padding: 4px 10px; font-size: 12px; cursor: pointer;
  font-family: var(--font-mono);
  transition: color 0.15s, border-color 0.15s;
}
.file-row .f-remove:hover { color: var(--danger); border-color: var(--danger); }

/* 라이브 변환 콘솔 */
.console {
  background: var(--panel-deep);
  font-family: var(--font-mono);
  font-size: 12.5px; line-height: 1.75;
  padding: 14px 16px;
  height: 232px; overflow-y: auto;
  white-space: pre-wrap; word-break: break-all;
}
.console .t { color: var(--text-dim); }
.console .ok { color: var(--ok); }
.console .warn { color: var(--warn); }
.console .err { color: var(--danger); }
.console .hl { color: var(--accent-strong); }

.statbar {
  display: grid; grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line-soft);
  background: var(--panel-2);
}
.statbar .stat { padding: 10px 14px; min-width: 0; }
.statbar .stat + .stat { border-left: 1px solid var(--line-soft); }
.statbar .k {
  font-family: var(--font-mono); font-size: 10px;
  letter-spacing: 0.14em; text-transform: uppercase; color: var(--text-dim);
}
.statbar .v {
  font-family: var(--font-mono); font-size: 15px; font-weight: 600;
  color: var(--text-strong); white-space: nowrap;
}
@media (max-width: 560px) {
  .statbar { grid-template-columns: repeat(2, 1fr); }
  .statbar .stat:nth-child(3), .statbar .stat:nth-child(4) { border-top: 1px solid var(--line-soft); }
  .statbar .stat:nth-child(3) { border-left: none; }
}

/* --------------------------------------------------------------------------
   모드 선택 카드
   -------------------------------------------------------------------------- */
.mode-grid { display: grid; gap: 12px; }
@media (min-width: 640px) { .mode-grid { grid-template-columns: 1fr 1fr; } }

.mode-card { position: relative; display: block; cursor: pointer; }
.mode-card input { position: absolute; opacity: 0; pointer-events: none; }
.mode-card .body {
  display: block; height: 100%;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--panel);
  padding: 14px 16px;
  transition: border-color 0.15s, background-color 0.15s;
}
.mode-card:hover .body { border-color: #2c3e5c; }
.mode-card input:checked + .body {
  border-color: var(--accent);
  background: rgba(94, 168, 232, 0.06);
}
.mode-card input:focus-visible + .body { outline: 2px solid var(--accent); outline-offset: 2px; }
.mode-card .m-title {
  display: flex; align-items: center; gap: 8px;
  font-weight: 700; color: var(--text-strong); font-size: 14.5px;
}
.mode-card .m-badge {
  font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.08em;
  padding: 2px 7px; border-radius: 99px;
  border: 1px solid var(--line); color: var(--text-dim);
}
.mode-card input:checked + .body .m-badge { border-color: var(--accent); color: var(--accent-strong); }
.mode-card .m-desc { display: block; font-size: 12.5px; color: var(--text-dim); margin-top: 5px; line-height: 1.6; }

/* --------------------------------------------------------------------------
   버튼
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-family: var(--font-mono); font-weight: 600; font-size: 14px;
  border-radius: 8px; padding: 12px 22px;
  border: 1px solid transparent; cursor: pointer;
  transition: background-color 0.15s, border-color 0.15s, color 0.15s, opacity 0.15s;
}
.btn-primary { background: var(--accent); color: var(--accent-ink); width: 100%; }
.btn-primary:hover { background: var(--accent-strong); }
.btn-primary:disabled { opacity: 0.45; cursor: not-allowed; }
.btn-ghost {
  background: transparent; color: var(--text-dim);
  border-color: var(--line); font-size: 12.5px; padding: 8px 16px;
}
.btn-ghost:hover { color: var(--danger); border-color: var(--danger); }

/* --------------------------------------------------------------------------
   상태 칩 / 알림
   -------------------------------------------------------------------------- */
.chip {
  display: inline-flex; align-items: center; gap: 7px;
  font-family: var(--font-mono); font-size: 11.5px;
  border: 1px solid var(--line); border-radius: 99px;
  padding: 4px 12px; color: var(--text-dim);
  background: var(--panel);
}
.chip .dot {
  width: 7px; height: 7px; border-radius: 99px; background: var(--text-dim);
  flex-shrink: 0;
}
.chip.is-ok .dot { background: var(--ok); box-shadow: 0 0 6px rgba(125, 222, 156, 0.8); }
.chip.is-ok { color: var(--ok); border-color: rgba(125, 222, 156, 0.35); }
.chip.is-warn .dot { background: var(--warn); animation: pulse 1.2s ease-in-out infinite; }
.chip.is-warn { color: var(--warn); border-color: rgba(232, 196, 106, 0.35); }
.chip.is-err .dot { background: var(--danger); }
.chip.is-err { color: var(--danger); border-color: rgba(232, 155, 155, 0.4); }

@keyframes pulse { 50% { opacity: 0.25; } }

.notice {
  border: 1px solid var(--line);
  border-left: 3px solid var(--warn);
  background: var(--panel);
  border-radius: 8px;
  padding: 12px 16px;
  font-size: 13px; color: var(--text);
}
.notice b { color: var(--warn); font-weight: 600; }

/* --------------------------------------------------------------------------
   사이드 카드
   -------------------------------------------------------------------------- */
.side-card {
  border: 1px solid var(--line); border-radius: 10px;
  background: var(--panel); padding: 18px;
}
.side-card h3 {
  font-family: var(--font-mono); font-size: 11px;
  letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--text-dim); margin-bottom: 12px;
}
.side-card ol { counter-reset: step; }
.side-card ol li {
  position: relative; padding-left: 30px; margin-bottom: 12px;
  font-size: 13px; color: var(--text); line-height: 1.6;
}
.side-card ol li::before {
  counter-increment: step; content: counter(step);
  position: absolute; left: 0; top: 2px;
  width: 20px; height: 20px; border-radius: 6px;
  border: 1px solid var(--line); color: var(--accent);
  font-family: var(--font-mono); font-size: 11px; font-weight: 600;
  display: flex; align-items: center; justify-content: center;
}
.side-card p { font-size: 12.5px; color: var(--text-dim); line-height: 1.65; }
.side-card p b { color: var(--ok); font-weight: 600; }

/* --------------------------------------------------------------------------
   본문 아티클 (가이드 / 정책 페이지 공용)
   -------------------------------------------------------------------------- */
.article {
  max-width: 760px;
}
.article .eyebrow {
  font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.2em;
  text-transform: uppercase; color: var(--accent);
  margin-bottom: 10px;
}
.article h1 {
  font-size: 30px; font-weight: 800; color: var(--text-strong);
  letter-spacing: -0.02em; line-height: 1.3; margin-bottom: 14px;
}
.article h2 {
  font-size: 21px; font-weight: 700; color: var(--text-strong);
  letter-spacing: -0.01em; margin: 44px 0 14px;
  padding-top: 26px; border-top: 1px solid var(--line-soft);
}
.article h3 { font-size: 16.5px; font-weight: 700; color: var(--text-strong); margin: 26px 0 8px; }
.article p { margin-bottom: 14px; color: var(--text); }
.article ul, .article ol { margin: 0 0 16px 4px; }
.article ul li, .article ol li {
  position: relative; padding-left: 20px; margin-bottom: 8px;
}
.article ul li::before {
  content: "·"; position: absolute; left: 4px; color: var(--accent); font-weight: 700;
}
.article ol { counter-reset: n; }
.article ol li::before {
  counter-increment: n; content: counter(n) ".";
  position: absolute; left: 0; color: var(--accent);
  font-family: var(--font-mono); font-size: 13px;
}
.article code {
  font-family: var(--font-mono); font-size: 0.86em;
  background: var(--panel-2); border: 1px solid var(--line-soft);
  border-radius: 4px; padding: 1px 6px; color: var(--accent-strong);
}
.article strong { color: var(--text-strong); }
.article a { color: var(--accent-strong); text-decoration: underline; text-underline-offset: 3px; }

.prompt-block {
  font-family: var(--font-mono); font-size: 13px; line-height: 1.7;
  background: var(--panel-deep); border: 1px solid var(--line);
  border-radius: 10px; padding: 16px 18px; margin: 14px 0 20px;
  color: var(--text); overflow-x: auto; white-space: pre-wrap;
}
.prompt-block::before {
  content: "PROMPT"; display: block;
  font-size: 9.5px; letter-spacing: 0.22em; color: var(--accent);
  margin-bottom: 8px;
}

.faq details {
  border: 1px solid var(--line); border-radius: 10px;
  background: var(--panel); margin-bottom: 10px;
}
.faq summary {
  cursor: pointer; padding: 14px 18px;
  font-weight: 600; color: var(--text-strong); font-size: 14.5px;
  list-style: none; position: relative; padding-right: 40px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+"; position: absolute; right: 18px; top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono); color: var(--accent); font-size: 16px;
}
.faq details[open] summary::after { content: "−"; }
.faq details .a { padding: 0 18px 16px; font-size: 14px; color: var(--text); }

/* --------------------------------------------------------------------------
   푸터
   -------------------------------------------------------------------------- */
.site-footer {
  border-top: 1px solid var(--line-soft);
  margin-top: 72px; padding: 30px 0 40px;
  font-size: 13px; color: var(--text-dim);
}
.site-footer .cols {
  display: flex; flex-wrap: wrap; gap: 12px 28px;
  justify-content: space-between; align-items: baseline;
}
.site-footer a { color: var(--text-dim); text-decoration: none; margin-right: 18px; }
.site-footer a:hover { color: var(--text-strong); }
.site-footer .fine { margin-top: 14px; font-size: 12px; line-height: 1.7; }

/* --------------------------------------------------------------------------
   모달 (용량 초과 등 경고 팝업)
   -------------------------------------------------------------------------- */
.modal-backdrop {
  position: fixed; inset: 0; z-index: 100;
  background: rgba(2, 6, 23, 0.72); backdrop-filter: blur(3px);
  display: flex; align-items: center; justify-content: center; padding: 20px;
}
.modal {
  width: 100%; max-width: 420px;
  background: var(--panel); border: 1px solid var(--line);
  border-radius: 12px; padding: 24px;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.55);
}
.modal .m-title {
  display: flex; align-items: center; gap: 10px;
  font-weight: 700; color: var(--text-strong); font-size: 16px; margin-bottom: 10px;
}
.modal .m-title .m-ico { color: var(--warn); font-family: var(--font-mono); }
.modal .m-body { font-size: 14px; color: var(--text); line-height: 1.7; margin-bottom: 20px; }
.modal .m-body .mono { color: var(--accent-strong); font-size: 13px; }
.modal .m-actions { display: flex; justify-content: flex-end; }
.modal .m-ok {
  font-family: var(--font-mono); font-size: 13px; font-weight: 600;
  background: var(--accent); color: var(--accent-ink);
  border: none; border-radius: 7px; padding: 9px 22px; cursor: pointer;
}
.modal .m-ok:hover { background: var(--accent-strong); }
.hidden { display: none !important; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}