@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;700;800&display=swap');

/* ═══════════════════════════════════════
   2109 AG URL — URL 인코더/디코더
   DesignKit Console 킷 변형(midnight 블루 테마) :
   · 넓은 900px 컨테이너 · 듀얼페인(입력/출력) · 탭(encode·decode·parse)
   · 파라미터 분해 테이블 · `//` 주석 라벨 · 신호등 점
   ※ 색은 _tokens.css(data-theme="midnight")가 관장.
═══════════════════════════════════════ */
:root {
  --bd: 1px;
  --r-1: 5px; --r-2: 6px; --r-3: 8px; --r-4: 10px; --r-5: 12px;
  --sh-1: 0 1px 2px rgba(0,0,0,.30);
  --sh-2: 0 2px 8px rgba(0,0,0,.35);
  --sh-3: 0 8px 24px rgba(0,0,0,.40);
  --glow: 0 0 0 1px var(--primary-alpha), 0 6px 20px var(--primary-glow);
  --ease: cubic-bezier(.4,0,.2,1);
  --ease-out: cubic-bezier(.16,1,.3,1);
  --t1: 130ms; --t2: 240ms;
  --wrap: 900px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 0 20px 72px;
  overflow-x: hidden;
  background:
    repeating-linear-gradient(0deg, transparent, transparent 31px, color-mix(in srgb, var(--text-strong) 3%, transparent) 32px),
    repeating-linear-gradient(90deg, transparent, transparent 31px, color-mix(in srgb, var(--text-strong) 3%, transparent) 32px),
    radial-gradient(1000px 500px at 82% -12%, color-mix(in srgb, var(--primary) 10%, transparent), transparent 60%),
    var(--bg);
  background-attachment: fixed;
}

/* ─── HEADER (터미널 타이틀바) ─── */
.site-header {
  position: sticky; top: 0; z-index: 50;
  width: 100vw; margin-bottom: 10px;
  border-bottom: var(--bd) solid var(--border);
  background: color-mix(in srgb, var(--surface) 88%, transparent);
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
}
.site-header__inner {
  max-width: var(--wrap); margin: 0 auto; height: 58px; padding: 0 20px;
  display: flex; align-items: center; justify-content: space-between;
}
.site-header__logo {
  display: inline-flex; align-items: center; gap: 10px;
  text-decoration: none; color: var(--text-strong); font-weight: 800;
}
.logo-badge {
  position: relative; width: 34px; height: 30px;
  display: inline-flex; align-items: flex-end; justify-content: center;
  padding-bottom: 5px; border-radius: var(--r-2);
  border: var(--bd) solid var(--border-2); background: var(--surface-2);
  color: var(--primary); overflow: hidden;
}
.logo-badge::before {
  content: ''; position: absolute; top: 6px; left: 7px;
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--err); box-shadow: 9px 0 0 var(--accent), 18px 0 0 var(--primary);
}
.logo-badge svg { width: 15px; height: 15px; }
.logo-text { display: inline-flex; flex-direction: column; line-height: 1.12; gap: 1px; }
.logo-main { font-size: 1.04rem; font-weight: 800; letter-spacing: -0.02em; color: var(--text-strong); }
.logo-main .accent { color: var(--primary); }
.logo-sub { font-size: 0.58rem; font-weight: 700; letter-spacing: 0.18em; color: var(--text-3); }
.header-actions { display: flex; align-items: center; gap: 8px; }
.site-header__nav { display: flex; align-items: center; gap: 4px; }
.site-header__nav a {
  font-size: 0.8rem; font-weight: 500; color: var(--text-2);
  text-decoration: none; padding: 7px 11px;
  border-radius: var(--r-1); border: var(--bd) solid transparent;
  transition: all var(--t1) var(--ease);
}
.site-header__nav a:hover { color: var(--primary); border-color: var(--border-2); background: var(--surface-2); }
.theme-toggle-btn {
  width: 36px; height: 36px; display: inline-flex; align-items: center; justify-content: center;
  border-radius: var(--r-1); background: var(--surface-2);
  border: var(--bd) solid var(--border-2); color: var(--text-2); cursor: pointer;
  transition: all var(--t1) var(--ease);
}
.theme-toggle-btn:hover { color: var(--primary); border-color: var(--primary); }
.theme-toggle-btn svg { width: 17px; height: 17px; }
.lang-select {
  height: 36px; padding: 0 26px 0 10px;
  border-radius: var(--r-1); background: var(--surface-2);
  border: var(--bd) solid var(--border-2); color: var(--text-2);
  font-family: inherit; font-size: 0.78rem; font-weight: 600; cursor: pointer;
  appearance: none; -webkit-appearance: none; -moz-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='10' viewBox='0 0 24 24' fill='none' stroke='%2394A3B8' stroke-width='3'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 9px center;
  transition: all var(--t1) var(--ease);
}
.lang-select:hover { color: var(--primary); border-color: var(--primary); }
@media (max-width: 480px) { .lang-select { max-width: 120px; } }
.ic-light { display: inline-flex; }
.ic-dark { display: none; }
[data-theme="nordic"] .ic-light { display: none; }
[data-theme="nordic"] .ic-dark { display: inline-flex; }
@media (max-width: 560px) { .site-header__nav { display: none; } }

/* ─── HERO ─── */
.hero {
  width: 100%; max-width: var(--wrap); margin: 38px auto 6px; text-align: left;
}
.hero-icon {
  display: inline-flex; align-items: center; justify-content: center;
  width: 54px; height: 54px; margin-bottom: 20px;
  background: var(--surface-2); border: var(--bd) solid var(--border-2);
  color: var(--primary); border-radius: var(--r-3);
  box-shadow: var(--sh-2), inset 0 0 0 1px color-mix(in srgb, var(--primary) 18%, transparent);
}
.hero-icon svg { width: 27px; height: 27px; }
.hero h1 {
  font-size: clamp(1.9rem, 5.5vw, 2.9rem); font-weight: 800;
  color: var(--text-strong); letter-spacing: -0.03em; line-height: 1.14; margin-bottom: 16px;
}
.hero h1 .grad {
  background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero h1 .grad::before { content: '> '; -webkit-text-fill-color: var(--primary); }
.hero p {
  font-size: 0.95rem; color: var(--text-2); line-height: 1.7;
  max-width: 640px; margin: 0; word-break: keep-all;
}

/* ─── SECTION LABEL ─── */
.section-label { width: 100%; max-width: var(--wrap); margin: 34px auto 14px; }
.section-label span { font-size: 0.82rem; font-weight: 700; color: var(--text-3); }
.section-label span::before { content: '// '; color: var(--primary); font-weight: 700; }

/* ─── TABS ─── */
.tabs {
  width: 100%; max-width: var(--wrap); margin: 0 auto 16px;
  display: flex; gap: 5px; padding: 5px;
  background: var(--surface-2); border: var(--bd) solid var(--border); border-radius: var(--r-3);
}
.tab-btn {
  flex: 1; padding: 12px 8px; border: none; background: transparent;
  color: var(--text-3); font-family: inherit; font-size: 0.86rem; font-weight: 700;
  border-radius: var(--r-2); cursor: pointer; transition: all var(--t1) var(--ease);
  display: inline-flex; align-items: center; justify-content: center; gap: 7px;
}
.tab-btn svg { width: 16px; height: 16px; }
.tab-btn:hover { color: var(--text-2); }
.tab-btn.active { background: var(--surface); color: var(--primary); box-shadow: var(--sh-1); }

/* ─── TOOL PANEL ─── */
.panel { width: 100%; max-width: var(--wrap); margin: 0 auto; }
.panel[hidden] { display: none; }

.mode-row {
  display: flex; align-items: center; flex-wrap: wrap; gap: 12px;
  margin-bottom: 14px;
}
.mode-seg { display: flex; gap: 6px; }
.mode-seg input[type="radio"] { display: none; }
.mode-seg label {
  padding: 9px 14px; border-radius: var(--r-2);
  background: var(--surface-2); border: var(--bd) solid var(--border-2);
  color: var(--text-2); font-size: 0.8rem; font-weight: 600; cursor: pointer;
  transition: all var(--t1) var(--ease);
}
.mode-seg label:hover { border-color: var(--primary); color: var(--primary); }
.mode-seg input[type="radio"]:checked + label {
  background: color-mix(in srgb, var(--primary) 14%, var(--surface-2));
  border-color: var(--primary); color: var(--primary);
}
.mode-hint { font-size: 0.76rem; color: var(--text-3); }
.mode-hint code { color: var(--primary); background: var(--surface-2); padding: 2px 6px; border-radius: 4px; }

/* 듀얼페인 */
.dual {
  display: grid; grid-template-columns: 1fr 44px 1fr; gap: 12px; align-items: stretch;
}
.io-card {
  display: flex; flex-direction: column;
  background: var(--surface); border: var(--bd) solid var(--border);
  border-radius: var(--r-4); box-shadow: var(--sh-1); overflow: hidden;
}
.io-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 14px; background: var(--surface-2);
  border-bottom: var(--bd) solid var(--border);
}
.io-label {
  font-size: 0.68rem; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--text-3);
}
.io-label::before { content: '● '; color: var(--ok); letter-spacing: 0; }
.io-card.out .io-label::before { color: var(--primary); }
.io-btns { display: flex; gap: 6px; }
.mini-btn {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 5px 9px; border-radius: var(--r-1);
  background: transparent; border: var(--bd) solid var(--border-2);
  color: var(--text-3); font-family: inherit; font-size: 0.7rem; font-weight: 700;
  cursor: pointer; transition: all var(--t1) var(--ease);
}
.mini-btn svg { width: 13px; height: 13px; }
.mini-btn:hover { color: var(--primary); border-color: var(--primary); }
.io-textarea {
  width: 100%; min-height: 220px; resize: vertical; flex: 1;
  padding: 15px 16px; border: none; outline: none;
  background: transparent; color: var(--text-strong);
  font-family: inherit; font-size: 0.9rem; line-height: 1.65;
  word-break: break-all;
}
.io-textarea::placeholder { color: var(--text-3); }
.io-card.out .io-textarea { color: var(--primary); }

.swap-col { display: flex; align-items: center; justify-content: center; }
.swap-btn {
  width: 40px; height: 40px; display: inline-flex; align-items: center; justify-content: center;
  border-radius: var(--r-2); background: var(--surface-2); color: var(--primary);
  border: var(--bd) solid var(--primary-alpha); box-shadow: 0 0 12px var(--primary-glow);
  cursor: pointer; transition: transform var(--t1) var(--ease), border-color var(--t1) var(--ease);
}
.swap-btn:hover { transform: rotate(180deg); border-color: var(--primary); }
.swap-btn svg { width: 18px; height: 18px; }

.io-foot {
  display: flex; align-items: center; gap: 14px;
  margin-top: 12px; font-size: 0.76rem; color: var(--text-3);
}
.io-foot .stat b { color: var(--text-2); font-weight: 700; }
.io-error { color: var(--err); font-size: 0.78rem; margin-top: 10px; min-height: 1em; }

/* ─── PARSE ─── */
.parse-input-wrap { margin-bottom: 16px; }
.parse-input {
  width: 100%; padding: 15px 16px;
  background: var(--surface); border: var(--bd) solid var(--border-2);
  border-radius: var(--r-3); color: var(--text-strong);
  font-family: inherit; font-size: 0.92rem; outline: none;
  transition: all var(--t1) var(--ease); word-break: break-all;
}
.parse-input:focus { border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-alpha); }
.parse-input::placeholder { color: var(--text-3); }

.parse-card {
  background: var(--surface); border: var(--bd) solid var(--border);
  border-radius: var(--r-4); box-shadow: var(--sh-1);
  padding: 8px 20px 16px; margin-bottom: 16px;
}
.parse-card h3 {
  font-size: 0.72rem; font-weight: 700; color: var(--text-3);
  text-transform: uppercase; letter-spacing: 0.08em; padding: 15px 2px 8px;
}
.parse-card h3::before { content: '// '; color: var(--primary); }
.pt { width: 100%; border-collapse: collapse; }
.pt td { padding: 11px 2px; border-bottom: var(--bd) solid var(--border); font-size: 0.86rem; vertical-align: top; }
.pt tr:last-child td { border-bottom: none; }
.pt .pk { color: var(--text-3); width: 92px; white-space: nowrap; }
.pt .pv { color: var(--text-strong); word-break: break-all; font-weight: 500; }
.pt .pv.empty { color: var(--text-3); font-style: italic; font-weight: 400; }

.qtable { width: 100%; border-collapse: collapse; }
.qtable th {
  text-align: left; padding: 9px 8px; font-size: 0.66rem; font-weight: 700;
  color: var(--text-3); text-transform: uppercase; letter-spacing: 0.08em;
  border-bottom: var(--bd) solid var(--border-2);
}
.qtable td { padding: 10px 8px; border-bottom: var(--bd) solid var(--border); font-size: 0.85rem; vertical-align: top; }
.qtable tr:last-child td { border-bottom: none; }
.qtable .qk { color: var(--primary); font-weight: 700; word-break: break-all; }
.qtable .qv { color: var(--text); word-break: break-all; }
.qtable .qd { color: var(--text-3); word-break: break-all; font-size: 0.78rem; }
.parse-empty { color: var(--text-3); font-size: 0.86rem; padding: 16px 2px; }

/* ─── ACTIONS ─── */
.btn-row { display: flex; gap: 10px; margin-bottom: 8px; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 7px;
  padding: 11px 18px; border-radius: var(--r-2);
  font-family: inherit; font-size: 0.85rem; font-weight: 700; cursor: pointer;
  border: var(--bd) solid var(--border-2); background: var(--surface-2); color: var(--text-2);
  transition: all var(--t1) var(--ease); text-decoration: none;
}
.btn svg { width: 15px; height: 15px; }
.btn:hover { border-color: var(--primary); color: var(--primary); }
.btn.primary {
  background: var(--grad); color: #04120a; border-color: transparent;
  box-shadow: 0 6px 20px var(--primary-glow);
}
.btn.primary:hover { transform: translateY(-2px); filter: brightness(1.05); }

.toast {
  position: fixed; left: 50%; bottom: 28px; transform: translateX(-50%) translateY(20px);
  background: var(--surface); color: var(--text-strong);
  border: var(--bd) solid var(--primary); border-radius: var(--r-2);
  padding: 11px 20px; font-size: 0.84rem; font-weight: 700;
  box-shadow: var(--sh-3); opacity: 0; pointer-events: none;
  transition: all var(--t2) var(--ease-out); z-index: 100;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ─── TRUST ─── */
.trust-bar {
  width: 100%; max-width: var(--wrap); margin: 40px auto 0; padding-top: 24px;
  border-top: var(--bd) solid var(--border);
  display: flex; flex-wrap: wrap; gap: 12px 32px;
}
.trust-item { display: inline-flex; align-items: center; gap: 8px; font-size: 0.8rem; font-weight: 500; color: var(--text-3); }
.trust-item svg { width: 16px; height: 16px; color: var(--primary); }

/* ─── FAQ / 콘텐츠 (SEO) ─── */
.content { width: 100%; max-width: var(--wrap); margin: 12px auto 0; }
.content h2 {
  font-size: 1.15rem; font-weight: 800; color: var(--text-strong);
  letter-spacing: -0.02em; margin: 30px 0 14px;
}
.content h2::before { content: '## '; color: var(--primary); font-weight: 700; }
.faq-item {
  background: var(--surface); border: var(--bd) solid var(--border);
  border-radius: var(--r-3); padding: 16px 18px; margin-bottom: 10px;
}
.faq-item .q { font-size: 0.9rem; font-weight: 700; color: var(--text-strong); margin-bottom: 8px; }
.faq-item .q::before { content: 'Q. '; color: var(--primary); }
.faq-item .a { font-size: 0.85rem; color: var(--text-2); line-height: 1.7; word-break: keep-all; }

/* ─── AD ─── */
.ad-grid { display: grid; grid-template-columns: repeat(2, 320px); gap: 12px; justify-content: center; margin: 40px auto 0; }
.ad-cell { width: 320px; min-height: 50px; }
@media (max-width: 720px) { .ad-grid { grid-template-columns: 320px; } }

/* ─── FOOTER ─── */
.site-footer {
  width: 100%; max-width: var(--wrap); margin: 36px auto 0; padding: 22px 4px;
  border-top: var(--bd) solid var(--border); text-align: left;
  display: flex; flex-wrap: wrap; align-items: center; gap: 4px 10px;
}
.site-footer a { color: var(--text-3); font-size: 0.8rem; text-decoration: none; transition: color var(--t1) var(--ease); }
.site-footer a:hover { color: var(--primary); }
.footer-divider { color: var(--border-2); }
.footer-copy { color: var(--text-3); font-size: 0.76rem; margin-left: auto; }

/* ─── 단순 문서 페이지(about/contact) ─── */
.doc { width: 100%; max-width: 720px; margin: 20px auto 0; }
.doc-title { font-size: 1.6rem; font-weight: 800; color: var(--text-strong); letter-spacing: -0.02em; margin: 20px 0 8px; }
.doc-sub { font-size: 0.86rem; color: var(--text-2); margin-bottom: 24px; }
.doc-sub::before { content: '# '; color: var(--text-3); }
.doc-card {
  background: var(--surface); border: var(--bd) solid var(--border);
  border-radius: var(--r-4); padding: 22px 24px; margin-bottom: 16px; box-shadow: var(--sh-1);
}
.doc-card h2 { font-size: 1.02rem; font-weight: 700; color: var(--text-strong); margin: 0 0 10px; }
.doc-card h2::before { content: '// '; color: var(--primary); }
.doc-card p { font-size: 0.88rem; color: var(--text-2); line-height: 1.75; word-break: keep-all; margin-bottom: 10px; }
.doc-card p:last-child { margin-bottom: 0; }
.doc-card a { color: var(--primary); }
.title-bar { width: 100%; max-width: 720px; margin: 24px auto 0; }
.title-bar a {
  display: inline-flex; align-items: center; gap: 5px; text-decoration: none;
  color: var(--text-2); font-size: 0.82rem; font-weight: 500; padding: 6px 11px;
  border: var(--bd) solid var(--border); border-radius: var(--r-1); background: var(--surface-2);
  transition: all var(--t1) var(--ease);
}
.title-bar a svg { width: 14px; height: 14px; }
.title-bar a:hover { color: var(--primary); border-color: var(--primary); }

/* ─── RTL (ar) ─── */
[dir="rtl"] .hero,
[dir="rtl"] .site-footer,
[dir="rtl"] .content,
[dir="rtl"] .faq-item,
[dir="rtl"] .doc,
[dir="rtl"] .doc-card,
[dir="rtl"] .section-label { text-align: right; }
[dir="rtl"] .footer-copy { margin-left: 0; margin-right: auto; }
/* URL·코드·파라미터 값은 항상 LTR (가독성) */
[dir="rtl"] .io-textarea,
[dir="rtl"] .parse-input { direction: ltr; text-align: left; }
[dir="rtl"] .pt,
[dir="rtl"] .qtable { direction: ltr; text-align: left; }
[dir="rtl"] .lang-select { background-position: left 9px center; padding: 0 10px 0 26px; }

/* ─── ANIM ─── */
.animate-fade-in { animation: fadeIn .5s var(--ease-out) both; }
.animate-slide-up { animation: slideUp .5s var(--ease-out) both; }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes slideUp { from { opacity: 0; transform: translateY(16px); } to { opacity: 1; transform: translateY(0); } }

/* ─── RESPONSIVE ─── */
@media (max-width: 680px) {
  .dual { grid-template-columns: 1fr; gap: 10px; }
  .swap-col { order: 0; }
  .swap-btn { transform: rotate(90deg); }
  .swap-btn:hover { transform: rotate(270deg); }
}
@media (max-width: 480px) {
  body { padding: 0 14px 64px; }
  .hero { margin-top: 28px; }
  .io-textarea { min-height: 160px; }
}