/* kai-money — KAI purple→blue gradient, big tap targets, mobile first. */
:root {
  --kai-start: #5b2bd1;
  --kai-end:   #2a7cff;
  --bg:        #f4f4f8;
  --card:      #ffffff;
  --ink:       #15151c;
  --muted:     #6b6b78;
  --line:      #e5e5ec;
  --ok:        #0f8a4e;
  --bad:       #c53030;
  --warn-bg:   #fff6e5;
  --warn-line: #d99100;
  --shadow:    0 2px 10px rgba(10, 10, 40, .06);
  --radius:    14px;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; background: var(--bg); color: var(--ink); font: 16px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; }
a { color: var(--kai-start); text-decoration: none; }
a:hover { text-decoration: underline; }
main { max-width: 860px; margin: 0 auto; padding: 16px; display: flex; flex-direction: column; gap: 16px; }
h1, h2, h3 { margin: 0 0 10px; line-height: 1.25; }

/* nav */
.nav { position: sticky; top: 0; z-index: 20; background: linear-gradient(90deg, var(--kai-start), var(--kai-end)); color: #fff; padding: 10px 16px; display: flex; align-items: center; gap: 12px; box-shadow: var(--shadow); }
.brand { color: #fff; font-weight: 800; font-size: 1.2rem; letter-spacing: .5px; }
.brand span { font-weight: 400; opacity: .85; margin-left: 2px; }
.brand.big { font-size: 2rem; display: block; text-align: center; margin: 24px 0 16px; color: var(--ink); background: linear-gradient(90deg, var(--kai-start), var(--kai-end)); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.nav nav { display: flex; gap: 2px; flex-wrap: wrap; margin-left: auto; }
.nav nav a { color: #fff; opacity: .85; padding: 8px 10px; border-radius: 8px; }
.nav nav a.on { background: rgba(255, 255, 255, .18); opacity: 1; }
.nav nav a.out { opacity: .7; }
.nav-toggle { display: none; background: transparent; color: #fff; border: 0; font-size: 1.4rem; margin-left: auto; }
@media (max-width: 640px) {
  .nav-toggle { display: inline-block; }
  .nav nav { display: none; flex-direction: column; position: absolute; top: 100%; right: 10px; background: #fff; color: var(--ink); border-radius: 10px; box-shadow: var(--shadow); padding: 8px; min-width: 180px; }
  .nav nav.open { display: flex; }
  .nav nav a { color: var(--ink); }
  .nav nav a.on { background: rgba(91, 43, 209, .1); }
}

/* cards */
.card { background: var(--card); border-radius: var(--radius); padding: 16px; box-shadow: var(--shadow); }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 12px; }
.row { display: flex; align-items: center; }
.row.space { justify-content: space-between; }
.row.gap { gap: 10px; flex-wrap: wrap; }
.row.tight { gap: 8px; margin-bottom: 8px; }
.muted { color: var(--muted); }
.small { font-size: 0.86rem; }
.ok { color: var(--ok); }
.bad { color: var(--bad); }
.err { color: var(--bad); background: #ffe9e9; border-radius: 8px; padding: 8px 10px; }
.ta-right { text-align: right; }

/* hero */
.hero { display: flex; justify-content: space-between; align-items: center; gap: 16px; background: linear-gradient(135deg, var(--kai-start), var(--kai-end)); color: #fff; padding: 20px; border-radius: var(--radius); box-shadow: var(--shadow); flex-wrap: wrap; }
.hero .muted { color: rgba(255, 255, 255, .8); }
.big-num { font-size: 2rem; font-weight: 800; }
.hero-actions { display: flex; gap: 8px; flex-wrap: wrap; }

/* buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 44px; padding: 10px 16px; border-radius: 10px; border: 0; font: inherit; font-weight: 600; cursor: pointer; }
.btn.primary { background: linear-gradient(90deg, var(--kai-start), var(--kai-end)); color: #fff; }
.btn.danger  { background: #fff; color: var(--bad); border: 1px solid var(--bad); }
.btn.ghost   { background: #fff; color: var(--ink); border: 1px solid var(--line); }
.btn:hover { filter: brightness(.95); }

/* pot card */
.pot .pot-balance { font-weight: 700; }

/* bar */
.bar { height: 10px; background: #ebebf1; border-radius: 999px; overflow: hidden; margin: 8px 0; }
.bar-fill { height: 100%; background: linear-gradient(90deg, var(--kai-start), var(--kai-end)); }

/* transactions */
.tx { list-style: none; margin: 0; padding: 0; }
.tx-row { display: flex; justify-content: space-between; gap: 10px; padding: 10px 0; border-top: 1px solid var(--line); }
.tx-row:first-child { border-top: 0; }

/* list / table */
.list { width: 100%; border-collapse: collapse; font-size: 0.95rem; }
.list th, .list td { padding: 8px 6px; text-align: left; border-bottom: 1px solid var(--line); }
.list th { font-size: 0.78rem; text-transform: uppercase; letter-spacing: .04em; color: var(--muted); }

/* form */
.form { display: flex; flex-direction: column; gap: 12px; }
.form label { display: flex; flex-direction: column; gap: 4px; font-size: 0.9rem; color: var(--muted); }
.form input, .form select, .form textarea { font: inherit; color: var(--ink); background: #fff; border: 1px solid var(--line); border-radius: 10px; padding: 10px 12px; min-height: 44px; }
.form input:focus, .form select:focus, .form textarea:focus { outline: 2px solid var(--kai-end); outline-offset: 1px; }
.form details { background: #faf9ff; padding: 10px; border-radius: 10px; }
.form details > summary { cursor: pointer; font-weight: 600; }

/* spend quick entry */
.quick { background: linear-gradient(135deg, #efeaff, #e6f0ff); padding: 12px; border-radius: 12px; margin-bottom: 10px; }
.warn-box { background: var(--warn-bg); border: 1px solid var(--warn-line); border-radius: 12px; padding: 12px; margin-bottom: 10px; }
.archived { opacity: .5; }

/* chat */
.ai-card { display: flex; flex-direction: column; gap: 10px; }
.chat { display: flex; flex-direction: column; gap: 8px; min-height: 180px; max-height: 50vh; overflow: auto; padding: 8px; background: #faf9ff; border-radius: 10px; }
.msg { max-width: 85%; padding: 8px 12px; border-radius: 14px; white-space: pre-wrap; word-wrap: break-word; }
.msg.me { align-self: flex-end; background: linear-gradient(90deg, var(--kai-start), var(--kai-end)); color: #fff; border-bottom-right-radius: 4px; }
.msg.bot { align-self: flex-start; background: #fff; border: 1px solid var(--line); border-bottom-left-radius: 4px; }
#ai-input { flex: 1; min-width: 0; }

/* login */
.login-body { background: linear-gradient(135deg, var(--kai-start), var(--kai-end)); min-height: 100vh; }
.login-wrap { max-width: 420px; margin: 0 auto; padding: 24px; }
.login-card { padding: 24px; }