/* ============================================================
   123address.com - Global Design System
   ============================================================ */

:root {
 --bg: #0b1020;
 --bg-soft: #10182e;
 --surface: #151e38;
 --surface-2: #1b2647;
 --border: #26325a;
 --text: #eaf0ff;
 --text-dim: #9fb0d6;
 --text-faint: #6b7aa3;
 --brand: #5b8cff;
 --brand-2: #7c5cff;
 --brand-3: #22d3ee;
 --accent: #ffb020;
 --good: #2fd27a;
 --bad: #ff5d6c;
 --radius: 14px;
 --radius-sm: 9px;
 --shadow: 0 10px 30px rgba(0, 0, 0, .35);
 --shadow-lg: 0 24px 60px rgba(0, 0, 0, .5);
 --maxw: 1180px;
 --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
 --mono: "SF Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
}

:root[data-theme="light"] {
 --bg: #f4f6fc;
 --bg-soft: #eef1fb;
 --surface: #ffffff;
 --surface-2: #f5f7ff;
 --border: #dde3f4;
 --text: #131a2e;
 --text-dim: #4c5875;
 --text-faint: #8a95b3;
 --shadow: 0 10px 30px rgba(24, 39, 75, .10);
 --shadow-lg: 0 24px 60px rgba(24, 39, 75, .16);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
 -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(1100px 600px at 12% -8%, rgba(91, 140, 255, .18), transparent 60%),
    radial-gradient(900px 500px at 100% 0%, rgba(124, 92, 255, .16), transparent 55%),
    radial-gradient(700px 700px at 85% 100%, rgba(34, 211, 238, .10), transparent 60%);
  pointer-events: none;
}

a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }

img { max-width: 100%; }

h1, h2, h3, h4 { line-height: 1.2; margin: 0 0 .5em; font-weight: 750; letter-spacing: -.02em; }
h1 { font-size: clamp(1.9rem, 4vw, 3rem); }
h2 { font-size: clamp(1.4rem, 3vw, 2rem); }
p { margin: 0 0 1em; }

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }

.mono { font-family: var(--mono); }
.dim { color: var(--text-dim); }
.faint { color: var(--text-faint); }
.center { text-align: center; }
.nowrap { white-space: nowrap; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }

/* ---------- Header / Nav ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: saturate(160%) blur(14px);
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  border-bottom: 1px solid var(--border);
}
.nav {
  display: flex;
  align-items: center;
  gap: 18px;
  height: 64px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.15rem;
  letter-spacing: -.02em;
  color: var(--text);
}
.brand:hover { text-decoration: none; }
.brand .logo {
  width: 32px; height: 32px;
  display: grid; place-items: center;
  border-radius: 9px;
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
  color: #fff; font-weight: 900; font-size: .95rem;
  box-shadow: 0 6px 16px rgba(91,140,255,.45);
}
.brand .logo::after { content: "123"; }
.nav-links {
  display: flex; align-items: center; gap: 4px;
  margin-left: auto;
}
.nav-links a {
  color: var(--text-dim);
  padding: 8px 12px;
  border-radius: 9px;
  font-weight: 600;
  font-size: .93rem;
}
.nav-links a:hover { color: var(--text); background: var(--surface); text-decoration: none; }
.nav-links a.active { color: var(--text); background: var(--surface-2); }

.nav-toggle, .theme-btn {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  width: 40px; height: 40px;
  border-radius: 10px;
  cursor: pointer;
  display: grid; place-items: center;
  font-size: 1.1rem;
}
.nav-toggle { display: none; }
.theme-btn:hover, .nav-toggle:hover { background: var(--surface-2); }

/* Dropdown mega menu */
.has-menu { position: relative; }
.menu-panel {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  min-width: 480px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  padding: 12px;
  display: none;
  grid-template-columns: 1fr 1fr;
  gap: 4px;
}
.has-menu:hover .menu-panel, .has-menu:focus-within .menu-panel { display: grid; }
.menu-panel a {
  display: flex; flex-direction: column;
  padding: 9px 11px; border-radius: 9px; color: var(--text);
}
.menu-panel a small { color: var(--text-faint); font-weight: 500; }
.menu-panel a:hover { background: var(--surface-2); text-decoration: none; }

@media (max-width: 900px) {
  .nav-toggle { display: grid; margin-left: auto; }
  .nav-links {
    position: absolute; top: 64px; left: 0; right: 0;
    flex-direction: column; align-items: stretch;
    background: var(--surface); border-bottom: 1px solid var(--border);
    padding: 10px; gap: 2px; margin: 0;
    display: none;
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 12px; }
  .menu-panel { position: static; display: grid; min-width: 0; box-shadow: none; border: none; background: transparent; padding: 0 0 0 12px; }
  .has-menu > a { display: block; }
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 11px 18px;
  border-radius: 11px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  font-weight: 650; font-size: .95rem;
  cursor: pointer;
  transition: transform .06s ease, background .15s ease, box-shadow .15s;
}
.btn:hover { background: var(--surface-2); text-decoration: none; }
.btn:active { transform: translateY(1px); }
.btn-primary {
  border: none;
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
  color: #fff;
  box-shadow: 0 8px 22px rgba(91,140,255,.4);
}
.btn-primary:hover { filter: brightness(1.06); }
.btn-lg { padding: 14px 26px; font-size: 1.05rem; }
.btn-ghost { background: transparent; }
.btn-block { width: 100%; justify-content: center; }
.btn-sm { padding: 6px 12px; font-size: .85rem; border-radius: 9px; }

/* ---------- Cards & sections ---------- */
.section { padding: 56px 0; }
.section-sm { padding: 32px 0; }
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: var(--shadow);
}
.eyebrow {
  display: inline-block;
  text-transform: uppercase;
  letter-spacing: .14em;
  font-size: .74rem;
  font-weight: 800;
  color: var(--brand-3);
  margin-bottom: 12px;
}

/* ---------- Hero ---------- */
.hero { padding: 72px 0 48px; text-align: center; }
.hero h1 { max-width: 16ch; margin-inline: auto; }
.hero h1 .grad {
  background: linear-gradient(120deg, var(--brand), var(--brand-2), var(--brand-3));
 -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero .lede { font-size: 1.2rem; color: var(--text-dim); max-width: 60ch; margin: 12px auto 26px; }
.hero-cta { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.hero-stats { display: flex; gap: 32px; justify-content: center; flex-wrap: wrap; margin-top: 40px; }
.hero-stats .stat b { font-size: 1.7rem; display: block; }
.hero-stats .stat span { color: var(--text-faint); font-size: .88rem; }

/* ---------- Tool grid ---------- */
.tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
}
.tool-card {
  display: flex; flex-direction: column; gap: 6px;
  padding: 20px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  transition: transform .12s ease, border-color .2s, box-shadow .2s;
  position: relative;
  overflow: hidden;
}
.tool-card:hover { text-decoration: none; transform: translateY(-3px); border-color: color-mix(in srgb, var(--brand) 55%, var(--border)); box-shadow: var(--shadow-lg); }
.tool-card .ic {
  width: 44px; height: 44px; border-radius: 11px;
  display: grid; place-items: center; font-size: 1.4rem;
  background: var(--surface-2);
  margin-bottom: 6px;
}
.tool-card h3 { margin: 0; font-size: 1.08rem; }
.tool-card p { margin: 0; color: var(--text-dim); font-size: .9rem; }
.tool-card .tag { position: absolute; top: 14px; right: 14px; font-size: .68rem; font-weight: 800; letter-spacing: .06em; padding: 3px 8px; border-radius: 20px; background: color-mix(in srgb, var(--brand) 22%, transparent); color: var(--brand); text-transform: uppercase; }

/* ---------- Generator app layout ---------- */
.gen-wrap { display: grid; grid-template-columns: 320px 1fr; gap: 24px; align-items: start; }
@media (max-width: 860px) { .gen-wrap { grid-template-columns: 1fr; } }

.controls .card + .card { margin-top: 16px; }
.controls-sticky { position: sticky; top: 84px; }

.field { margin-bottom: 16px; }
.field:last-child { margin-bottom: 0; }
.field label { display: block; font-weight: 650; font-size: .9rem; margin-bottom: 6px; }
.field .hint { font-size: .8rem; color: var(--text-faint); margin-top: 4px; }

select, input[type="text"], input[type="number"], input[type="email"], textarea {
  width: 100%;
  padding: 10px 12px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  font-family: inherit;
  font-size: .95rem;
}
select:focus, input:focus, textarea:focus { outline: 2px solid color-mix(in srgb, var(--brand) 60%, transparent); outline-offset: 1px; }
textarea { resize: vertical; min-height: 90px; }

input[type="range"] { width: 100%; accent-color: var(--brand); }

.seg { display: inline-flex; background: var(--surface-2); border: 1px solid var(--border); border-radius: 11px; padding: 3px; gap: 3px; flex-wrap: wrap; }
.seg button {
  border: none; background: transparent; color: var(--text-dim);
  padding: 7px 13px; border-radius: 8px; cursor: pointer; font-weight: 600; font-size: .88rem;
}
.seg button.active { background: var(--surface); color: var(--text); box-shadow: 0 2px 6px rgba(0,0,0,.2); }

.chk { display: flex; align-items: center; gap: 9px; padding: 7px 0; cursor: pointer; font-size: .92rem; }
.chk input { width: 18px; height: 18px; accent-color: var(--brand); }

.chip-row { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  padding: 7px 13px; border-radius: 20px; border: 1px solid var(--border);
  background: var(--surface-2); color: var(--text-dim); cursor: pointer; font-size: .86rem; font-weight: 600;
  user-select: none;
}
.chip.active { background: color-mix(in srgb, var(--brand) 20%, transparent); border-color: var(--brand); color: var(--text); }

/* ---------- Results ---------- */
.results-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 16px; flex-wrap: wrap; }
.results-head .actions { display: flex; gap: 8px; flex-wrap: wrap; }

.results { display: grid; gap: 14px; }
.result-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px;
  position: relative;
  animation: pop .28s ease;
}
@keyframes pop { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }

.result-card .copy-btn {
  position: absolute; top: 12px; right: 12px;
  background: var(--surface-2); border: 1px solid var(--border); color: var(--text-dim);
  border-radius: 8px; padding: 5px 10px; font-size: .78rem; cursor: pointer; font-weight: 600;
}
.result-card .copy-btn:hover { color: var(--text); background: var(--surface); }
.result-card .copy-btn.done { color: var(--good); border-color: var(--good); }

.kv { display: grid; grid-template-columns: 150px 1fr; gap: 4px 14px; }
.kv dt { color: var(--text-faint); font-size: .84rem; font-weight: 600; }
.kv dd { margin: 0; font-weight: 500; }
@media (max-width: 520px) { .kv { grid-template-columns: 1fr; } .kv dd { margin-bottom: 6px; } }

.big-value { font-size: 1.5rem; font-weight: 700; font-family: var(--mono); word-break: break-all; }
.result-list { display: flex; flex-direction: column; }
.result-list .row { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 10px 2px; border-bottom: 1px dashed var(--border); }
.result-list .row:last-child { border-bottom: none; }
.result-list .row .val { font-family: var(--mono); font-size: 1rem; }
.mini-copy { background: transparent; border: none; color: var(--text-faint); cursor: pointer; font-size: .9rem; padding: 4px 8px; border-radius: 6px; }
.mini-copy:hover { color: var(--text); background: var(--surface-2); }

.empty-state { text-align: center; padding: 48px 20px; color: var(--text-faint); }
.empty-state .big { font-size: 2.4rem; margin-bottom: 8px; }

.avatar {
  width: 56px; height: 56px; border-radius: 50%;
  display: grid; place-items: center; font-weight: 800; color: #fff; font-size: 1.3rem;
  flex: 0 0 auto;
}

/* ---------- Toast ---------- */
.toast {
  position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%) translateY(20px);
  background: var(--surface); border: 1px solid var(--border); color: var(--text);
  padding: 11px 18px; border-radius: 12px; box-shadow: var(--shadow-lg);
  opacity: 0; pointer-events: none; transition: all .25s ease; z-index: 100; font-weight: 600; font-size: .9rem;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ---------- Notice / disclaimer ---------- */
.notice {
  border-left: 3px solid var(--accent);
  background: color-mix(in srgb, var(--accent) 10%, var(--surface));
  padding: 14px 18px; border-radius: 0 10px 10px 0; font-size: .9rem; color: var(--text-dim);
}
.notice b { color: var(--text); }

/* ---------- Content pages (prose) ---------- */
.prose { max-width: 76ch; }
.prose h2 { margin-top: 1.6em; }
.prose ul, .prose ol { padding-left: 1.3em; }
.prose li { margin-bottom: .4em; }
.prose code { font-family: var(--mono); background: var(--surface-2); padding: 2px 6px; border-radius: 6px; font-size: .9em; }
.faq details { border: 1px solid var(--border); border-radius: 11px; padding: 4px 18px; margin-bottom: 10px; background: var(--surface); }
.faq summary { cursor: pointer; font-weight: 650; padding: 12px 0; }
.faq details[open] summary { color: var(--brand); }

/* ---------- Footer ---------- */
.site-footer { border-top: 1px solid var(--border); margin-top: 40px; background: var(--bg-soft); }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 28px; padding: 48px 0 30px; }
@media (max-width: 760px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
.footer-grid h4 { font-size: .82rem; text-transform: uppercase; letter-spacing: .1em; color: var(--text-faint); }
.footer-grid a { display: block; color: var(--text-dim); padding: 4px 0; font-size: .92rem; }
.footer-grid a:hover { color: var(--text); }
.footer-bottom { border-top: 1px solid var(--border); padding: 18px 0; display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; color: var(--text-faint); font-size: .85rem; }

/* ---------- Utility ---------- */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
@media (max-width: 700px) { .grid-2, .grid-3 { grid-template-columns: 1fr; } }
.flex { display: flex; gap: 12px; align-items: center; }
.wrap { flex-wrap: wrap; }
.mt-0 { margin-top: 0; } .mb-0 { margin-bottom: 0; }
.mt-1 { margin-top: 8px; } .mt-2 { margin-top: 16px; } .mt-3 { margin-top: 24px; } .mt-4 { margin-top: 32px; }
.tabbar { display: flex; gap: 4px; border-bottom: 1px solid var(--border); margin-bottom: 20px; overflow-x: auto; }
.tabbar button { border: none; background: transparent; color: var(--text-dim); padding: 12px 16px; cursor: pointer; font-weight: 650; border-bottom: 2px solid transparent; white-space: nowrap; }
.tabbar button.active { color: var(--text); border-bottom-color: var(--brand); }

.badge { display: inline-block; padding: 3px 9px; border-radius: 20px; font-size: .72rem; font-weight: 700; background: var(--surface-2); color: var(--text-dim); }
.badge.good { background: color-mix(in srgb, var(--good) 20%, transparent); color: var(--good); }

/* ---------- Private Vault ---------- */
.vault-wrap { display: grid; grid-template-columns: 250px 1fr; gap: 20px; align-items: start; }
@media (max-width: 820px) { .vault-wrap { grid-template-columns: 1fr; } }
.vault-nav { position: sticky; top: 84px; display: flex; flex-direction: column; gap: 14px; }
@media (max-width: 820px) { .vault-nav { position: static; } }
.vault-navgroup h4 { font-size: .72rem; text-transform: uppercase; letter-spacing: .1em; color: var(--text-faint); margin: 0 0 6px; }
.vault-navlink { display: block; padding: 8px 11px; border-radius: 9px; color: var(--text-dim); font-size: .9rem; font-weight: 600; cursor: pointer; }
.vault-navlink:hover { background: var(--surface); color: var(--text); text-decoration: none; }
.vault-navlink.active { background: var(--surface-2); color: var(--text); }
.vault-panel { min-height: 360px; }
.tool-panel-head h2 { margin: 0 0 4px; }
.vlabel { display: block; font-weight: 650; font-size: .88rem; margin-bottom: 12px; }
.vlabel input, .vlabel textarea, .vlabel select { margin-top: 5px; }
.vlabel textarea { min-height: 80px; font-family: inherit; }

.vault-lock { max-width: 420px; margin: 20px auto; text-align: center; }
.vault-lock-ic { font-size: 3rem; }
.vault-lock input { margin-bottom: 10px; text-align: center; }
.vault-err { color: var(--bad); font-size: .85rem; min-height: 1.2em; margin-bottom: 6px; }

.vault-head { display: flex; justify-content: space-between; align-items: center; gap: 12px; margin-bottom: 4px; flex-wrap: wrap; }
.vault-bar { display: flex; gap: 10px; margin: 14px 0; }
.vault-bar input { flex: 1; }
.vault-list { display: grid; gap: 12px; }
.vault-item { border: 1px solid var(--border); border-radius: 12px; padding: 14px 16px; background: var(--surface-2); }
.vault-item-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 8px; }
.vault-item-head b { font-size: 1.05rem; }
.vault-item-actions { display: flex; gap: 4px; }
.vrow { display: grid; grid-template-columns: 130px 1fr; gap: 6px 12px; padding: 3px 0; font-size: .9rem; }
.vrow .vk { color: var(--text-faint); font-weight: 600; }
.vrow .vv { word-break: break-word; }
.secret { font-family: var(--mono); cursor: pointer; letter-spacing: 1px; }
.secret:hover { color: var(--brand); }
.vault-foot { display: flex; justify-content: space-between; align-items: center; gap: 10px; margin-top: 16px; flex-wrap: wrap; }
.vault-form .vlabel input, .vault-form .vlabel textarea { width: 100%; }