/* Casino Strategy Trainer — design system */
:root {
  --bg: #0b1016;
  --bg-2: #0f151d;
  --panel: #141b24;
  --panel-2: #1a2330;
  --panel-3: #212c3b;
  --border: #283444;
  --border-2: #33425a;
  --text: #e8edf2;
  --muted: #93a1b3;
  --faint: #66758a;
  --gold: #d9ae55;
  --gold-2: #f1cf85;
  --felt: #0e5a37;
  --felt-2: #0a4429;
  --felt-line: rgba(255, 255, 255, 0.55);
  --green: #3fb950;
  --red: #f25c54;
  --blue: #58a6ff;
  --amber: #f0b429;
  --purple: #b083f0;
  --orange: #f0883e;
  --grid: rgba(255, 255, 255, 0.07);
  --track: rgba(255, 255, 255, 0.06);
  /* strategy action colours (always paired with a letter) */
  --a-hit: #d9534f;
  --a-stand: #2e9e4f;
  --a-double: #2f74d0;
  --a-split: #8a5cd6;
  --a-surrender: #b8702b;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
  --font: "Segoe UI", system-ui, -apple-system, Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "Cascadia Mono", Consolas, monospace;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  font: 15px/1.5 var(--font);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--gold-2); }
h1, h2, h3, h4 { line-height: 1.2; margin: 0 0 0.5em; font-weight: 650; letter-spacing: 0.01em; }
h1 { font-size: 26px; } h2 { font-size: 19px; } h3 { font-size: 16px; } h4 { font-size: 14px; }
p { margin: 0 0 0.75em; }
small, .small { font-size: 12.5px; }
.muted { color: var(--muted); } .faint { color: var(--faint); }
.pos { color: var(--green); } .neg { color: var(--red); } .gold { color: var(--gold-2); }
.mono { font-family: var(--mono); }
.nowrap { white-space: nowrap; }
.center { text-align: center; } .right { text-align: right; }
.hidden { display: none !important; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
:focus-visible { outline: 2px solid var(--gold-2); outline-offset: 2px; }

/* ---------- header ---------- */
.app-header {
  position: sticky; top: env(safe-area-inset-top, 0px); z-index: 50;
  background: rgba(11, 16, 22, 0.94); backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.header-row { display: flex; align-items: center; gap: 16px; padding: 10px 20px; max-width: 1440px; margin: 0 auto; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--text); flex-shrink: 0; }
.brand-mark { width: 30px; height: 30px; border-radius: 8px; background: linear-gradient(135deg, var(--gold), #9c7328); display: grid; place-items: center; font-weight: 800; color: #1b1405; font-size: 15px; }
.brand-name { font-weight: 700; font-size: 15px; letter-spacing: 0.04em; text-transform: uppercase; }
.brand-name span { color: var(--gold-2); }
.nav { display: flex; gap: 2px; overflow-x: auto; scrollbar-width: none; flex: 1; }
.nav::-webkit-scrollbar { display: none; }
.nav a {
  color: var(--muted); text-decoration: none; padding: 7px 11px; border-radius: 8px; font-size: 14px; white-space: nowrap; font-weight: 550;
}
.nav a:hover { color: var(--text); background: var(--panel-2); }
.nav a.active { color: var(--text); background: var(--panel-3); box-shadow: inset 0 -2px 0 var(--gold); }
.header-tools { display: flex; align-items: center; gap: 8px; flex-shrink: 0; }
.bankroll-pill {
  display: flex; flex-direction: column; align-items: flex-end; padding: 3px 12px; border-radius: 10px;
  background: var(--panel-2); border: 1px solid var(--border); min-width: 118px;
}
.bankroll-pill .lbl { font-size: 10.5px; text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted); }
.bankroll-pill .val { font-weight: 700; font-size: 16px; font-variant-numeric: tabular-nums; }
.menu-btn { display: none; }
.nav-group-label, .nav-extra { display: none; }

main { max-width: 1440px; margin: 0 auto; padding: 20px; }
.page-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 16px; flex-wrap: wrap; margin-bottom: 16px; }
.page-head h1 { margin: 0; }
.page-head .sub { color: var(--muted); margin-top: 4px; }

/* ---------- panels & layout ---------- */
.panel { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; }
.panel + .panel { margin-top: 16px; }
.panel-head { display: flex; justify-content: space-between; align-items: center; gap: 12px; margin-bottom: 12px; }
.panel-head h2, .panel-head h3 { margin: 0; }
.panel.tight { padding: 12px; }
.grid > .panel, .grid-2 > .panel, .grid-3 > .panel, .grid-4 > .panel, .split-main > .panel, .tiles > .panel { margin-top: 0; }
.stack > * + * { margin-top: 12px; }
.stack-lg > * + * { margin-top: 20px; }
.row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.row.between { justify-content: space-between; }
.grid { display: grid; gap: 16px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; }
.split-main { display: grid; grid-template-columns: minmax(0, 1fr) 360px; gap: 16px; align-items: start; }
.divider { height: 1px; background: var(--border); margin: 14px 0; }

/* ---------- tiles ---------- */
.tiles { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 10px; }
.tile { background: var(--panel-2); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 10px 12px; min-width: 0; }
.tile-label { font-size: 11.5px; text-transform: uppercase; letter-spacing: 0.07em; color: var(--muted); }
.tile-value { font-size: 20px; font-weight: 700; font-variant-numeric: tabular-nums; margin-top: 2px; overflow-wrap: anywhere; }
.tile-sub { font-size: 12px; color: var(--muted); margin-top: 2px; }

/* ---------- buttons & inputs ---------- */
.btn {
  appearance: none; border: 1px solid var(--border-2); background: var(--panel-2); color: var(--text);
  padding: 8px 14px; border-radius: 9px; font: 600 14px var(--font); cursor: pointer; transition: background 0.12s, border-color 0.12s, transform 0.05s;
  display: inline-flex; align-items: center; justify-content: center; gap: 6px; min-height: 38px;
}
.btn:hover:not(:disabled) { background: var(--panel-3); border-color: var(--faint); }
.btn:active:not(:disabled) { transform: translateY(1px); }
.btn:disabled { opacity: 0.4; cursor: not-allowed; }
.btn-primary { background: linear-gradient(180deg, var(--gold-2), var(--gold)); color: #1d1606; border-color: #b8913f; }
.btn-primary:hover:not(:disabled) { background: linear-gradient(180deg, #f6dca0, var(--gold-2)); }
.btn-danger { background: #5a1d1d; border-color: #8a2d2d; }
.btn-ghost { background: transparent; }
.btn-sm { padding: 5px 10px; min-height: 30px; font-size: 13px; }
.btn-lg { padding: 12px 22px; min-height: 48px; font-size: 16px; }
.icon-btn { background: none; border: 0; color: var(--muted); font-size: 24px; line-height: 1; cursor: pointer; padding: 4px 8px; border-radius: 6px; }
.icon-btn:hover { color: var(--text); background: var(--panel-2); }
input[type=text], input[type=number], select, textarea {
  background: var(--bg-2); color: var(--text); border: 1px solid var(--border-2); border-radius: 8px; padding: 7px 10px; font: 14px var(--font); min-height: 36px;
}
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--gold); }
label.field { display: flex; flex-direction: column; gap: 4px; font-size: 12.5px; color: var(--muted); }
label.field > span { text-transform: uppercase; letter-spacing: 0.06em; font-size: 11px; }
.check { display: inline-flex; align-items: center; gap: 8px; cursor: pointer; font-size: 14px; }
.check input { width: 16px; height: 16px; accent-color: var(--gold); }
.form-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(170px, 1fr)); gap: 12px; }

.seg { display: inline-flex; background: var(--bg-2); border: 1px solid var(--border-2); border-radius: 10px; padding: 3px; gap: 2px; }
.seg button { background: none; border: 0; color: var(--muted); padding: 6px 12px; border-radius: 7px; font: 600 13.5px var(--font); cursor: pointer; }
.seg button.active { background: var(--panel-3); color: var(--text); box-shadow: inset 0 0 0 1px var(--border-2); }
.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--border); margin-bottom: 14px; overflow-x: auto; }
.tab { background: none; border: 0; color: var(--muted); padding: 9px 14px; font: 600 14px var(--font); cursor: pointer; border-bottom: 2px solid transparent; white-space: nowrap; }
.tab.active { color: var(--text); border-bottom-color: var(--gold); }

/* ---------- tables ---------- */
table.data { width: 100%; border-collapse: collapse; font-size: 13.5px; }
table.data th { text-align: left; font-size: 11.5px; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); font-weight: 600; padding: 8px 10px; border-bottom: 1px solid var(--border); }
table.data td { padding: 8px 10px; border-bottom: 1px solid var(--grid); vertical-align: top; }
table.data tr:last-child td { border-bottom: 0; }
table.data td.num, table.data th.num { text-align: right; font-variant-numeric: tabular-nums; }
.table-wrap { overflow-x: auto; }

/* ---------- badges & callouts ---------- */
.badge { display: inline-block; padding: 2px 8px; border-radius: 999px; font-size: 11.5px; font-weight: 700; letter-spacing: 0.04em; text-transform: uppercase; background: var(--panel-3); color: var(--muted); }
.badge-green { background: rgba(63, 185, 80, 0.15); color: #6fdc7e; }
.badge-red { background: rgba(242, 92, 84, 0.15); color: #ff8a84; }
.badge-amber { background: rgba(240, 180, 41, 0.15); color: #f7c95a; }
.badge-blue { background: rgba(88, 166, 255, 0.15); color: #8cc2ff; }
.badge-gold { background: rgba(217, 174, 85, 0.18); color: var(--gold-2); }
.callout { border-left: 3px solid var(--gold); background: rgba(217, 174, 85, 0.08); padding: 10px 14px; border-radius: 0 8px 8px 0; font-size: 14px; }
.callout.blue { border-color: var(--blue); background: rgba(88, 166, 255, 0.08); }
.callout.red { border-color: var(--red); background: rgba(242, 92, 84, 0.08); }
.callout.green { border-color: var(--green); background: rgba(63, 185, 80, 0.08); }
.callout strong { color: var(--text); }
.kbd { font-family: var(--mono); font-size: 12px; background: var(--panel-3); border: 1px solid var(--border-2); border-bottom-width: 2px; padding: 0 5px; border-radius: 4px; }
.info-dot { display: inline-grid; place-items: center; width: 16px; height: 16px; border-radius: 50%; background: var(--panel-3); color: var(--muted); font-size: 10.5px; font-weight: 700; cursor: help; margin-left: 4px; vertical-align: 1px; }

/* ---------- decision verdict (good decision vs good outcome) ---------- */
.verdict { border-radius: var(--radius); border: 1px solid var(--border); background: var(--panel-2); padding: 14px; }
.verdict-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
.verdict-box { border-radius: 10px; padding: 10px 12px; background: var(--bg-2); border: 1px solid var(--border); }
.verdict-box .lbl { font-size: 11px; text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted); }
.verdict-box .val { font-size: 17px; font-weight: 750; margin-top: 2px; }
.verdict-box.good { border-color: rgba(63, 185, 80, 0.55); background: rgba(63, 185, 80, 0.07); }
.verdict-box.good .val { color: #7ee08b; }
.verdict-box.bad { border-color: rgba(240, 180, 41, 0.55); background: rgba(240, 180, 41, 0.07); }
.verdict-box.bad .val { color: #f7c95a; }
.verdict-box.win .val { color: #7ee08b; } .verdict-box.lose .val { color: #ff8a84; } .verdict-box.push .val { color: var(--text); }
.verdict-note { margin-top: 10px; font-size: 13.5px; color: var(--muted); }
.verdict-note strong { color: var(--text); }

/* ---------- strategy action chips ---------- */
.act { display: inline-grid; place-items: center; border-radius: 6px; font-weight: 800; color: #fff; min-width: 26px; height: 24px; padding: 0 6px; font-size: 12px; letter-spacing: 0.02em; }
.act-H, .act-hit { background: var(--a-hit); }
.act-S, .act-stand { background: var(--a-stand); }
.act-D, .act-double { background: var(--a-double); }
.act-P, .act-split { background: var(--a-split); }
.act-R, .act-surrender { background: var(--a-surrender); }

/* ---------- chips ---------- */
.chip {
  --c: #e9e9e9; --t: #222;
  display: inline-grid; place-items: center; width: 44px; height: 44px; border-radius: 50%;
  background: radial-gradient(circle at 50% 50%, var(--c) 0 52%, transparent 53%), repeating-conic-gradient(var(--c) 0 20deg, #fff 20deg 30deg);
  border: 2px solid rgba(0, 0, 0, 0.35); color: var(--t); font-weight: 800; font-size: 13px; box-shadow: 0 2px 4px rgba(0,0,0,0.45), inset 0 0 0 3px rgba(0,0,0,0.12);
  user-select: none; font-variant-numeric: tabular-nums;
}
.chip-1 { --c: #f2f2f2; --t: #1d1d1d; }
.chip-5 { --c: #d23b35; --t: #fff; }
.chip-10 { --c: #2c64c9; --t: #fff; }
.chip-25 { --c: #1f8a47; --t: #fff; }
.chip-100 { --c: #1c1c1c; --t: #fff; }
.chip-500 { --c: #7a3fb8; --t: #fff; }
.chip-sm { width: 30px; height: 30px; font-size: 10.5px; border-width: 1.5px; }
.chip-btn { cursor: pointer; transition: transform 0.1s; }
.chip-btn:hover { transform: translateY(-2px); }
.chip-btn.selected { transform: translateY(-4px); box-shadow: 0 0 0 3px var(--gold-2), 0 6px 12px rgba(0,0,0,0.5); }
.chip-selector { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }

/* ---------- felt ---------- */
.felt {
  background: radial-gradient(ellipse at 50% 20%, #13744a 0%, var(--felt) 45%, var(--felt-2) 100%);
  border: 10px solid #4a2e17; border-radius: 22px; box-shadow: inset 0 0 60px rgba(0,0,0,0.45), var(--shadow);
  color: #f2f7f3; position: relative;
}

/* ---------- modal ---------- */
.modal-backdrop { position: fixed; inset: 0; background: rgba(2, 5, 9, 0.66); z-index: 200; display: grid; place-items: center; padding: 16px; animation: fade 0.12s ease-out; }
.modal { background: var(--panel); border: 1px solid var(--border-2); border-radius: 14px; width: min(560px, 100%); max-height: min(88vh, 900px); display: flex; flex-direction: column; box-shadow: var(--shadow); }
.modal.modal-wide { width: min(900px, 100%); }
.modal-head { display: flex; align-items: center; justify-content: space-between; padding: 14px 16px 0 18px; }
.modal-head h2 { margin: 0; }
.modal-body { padding: 12px 18px; overflow-y: auto; }
.modal-actions { display: flex; justify-content: flex-end; gap: 8px; padding: 12px 18px 16px; border-top: 1px solid var(--border); }
@keyframes fade { from { opacity: 0; } to { opacity: 1; } }

.toast-host { position: fixed; bottom: 18px; left: 50%; transform: translateX(-50%); z-index: 300; display: flex; flex-direction: column; gap: 8px; align-items: center; pointer-events: none; }
.toast { background: var(--panel-3); border: 1px solid var(--border-2); padding: 9px 16px; border-radius: 10px; box-shadow: var(--shadow); font-size: 14px; transition: opacity 0.3s, transform 0.3s; max-width: 90vw; }
.toast-error { border-color: #8a2d2d; } .toast-good { border-color: #2c7a3a; }
.toast-out { opacity: 0; transform: translateY(8px); }

.chart-canvas { display: block; width: 100%; }
.chart-host { width: 100%; min-width: 0; }
.legend { display: flex; gap: 14px; flex-wrap: wrap; font-size: 12.5px; color: var(--muted); }
.legend i { display: inline-block; width: 10px; height: 10px; border-radius: 3px; margin-right: 5px; vertical-align: -1px; }

.progress { height: 8px; background: var(--track); border-radius: 99px; overflow: hidden; }
.progress > div { height: 100%; background: var(--gold); border-radius: 99px; transition: width 0.2s; }

/* ---------- dashboard ---------- */
.hero { padding: 28px; border-radius: 18px; background: linear-gradient(135deg, #16241c 0%, #121a24 60%); border: 1px solid var(--border); position: relative; overflow: hidden; }
.hero h1 { font-size: 30px; letter-spacing: 0.06em; text-transform: uppercase; }
.hero h1 span { color: var(--gold-2); }
.hero p { color: var(--muted); max-width: 720px; }
.game-cards { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; }
@media (max-width: 1280px) { .game-cards { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
.game-card { display: flex; flex-direction: column; gap: 10px; text-decoration: none; color: var(--text); background: var(--panel); border: 1px solid var(--border); border-radius: 16px; padding: 18px; transition: border-color 0.15s, transform 0.15s; min-height: 200px; }
.game-card:hover { border-color: var(--gold); transform: translateY(-2px); }
.game-card .gc-icon { font-size: 34px; line-height: 1; }
.game-card h2 { margin: 0; letter-spacing: 0.06em; text-transform: uppercase; font-size: 18px; }
.game-card p { color: var(--muted); margin: 0; flex: 1; }
.game-card .gc-links { display: flex; gap: 8px; flex-wrap: wrap; }
.principle { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 10px; }
.principle > div { background: var(--panel-2); border: 1px solid var(--border); border-radius: 10px; padding: 12px; font-size: 13.5px; }
.principle b { display: block; font-size: 12px; text-transform: uppercase; letter-spacing: 0.07em; margin-bottom: 4px; }

/* ---------- glossary / learn ---------- */
.glossary { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 12px; }
.glossary > div { background: var(--panel-2); border: 1px solid var(--border); border-radius: 10px; padding: 12px 14px; }
.glossary dt, .glossary b { font-weight: 700; color: var(--gold-2); }
.glossary p { margin: 4px 0 0; font-size: 13.5px; color: var(--muted); }

/* ---------- quiz ---------- */
.quiz-q { font-size: 17px; font-weight: 650; margin-bottom: 12px; }
.quiz-opts { display: grid; gap: 8px; }
.quiz-opt { text-align: left; justify-content: flex-start; }
.quiz-opt.correct { border-color: var(--green); background: rgba(63,185,80,0.12); }
.quiz-opt.wrong { border-color: var(--red); background: rgba(242,92,84,0.12); }

/* ---------- responsive ---------- */
@media (max-width: 1580px) {
  .header-row { flex-wrap: wrap; row-gap: 6px; }
  .nav { order: 3; flex-basis: 100%; }
  .header-tools { margin-left: auto; }
}
@media (max-width: 1100px) {
  .split-main { grid-template-columns: minmax(0, 1fr); }
  .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .principle { grid-template-columns: repeat(2, minmax(0,1fr)); }
}
@media (max-width: 860px) {
  .header-row { flex-wrap: wrap; gap: 8px 12px; padding: 8px 16px; }
  /* Phone / small tablet: the nav collapses into a menu sheet */
  #btn-rules, #btn-reset, #btn-new { display: none; }
  .menu-btn { display: inline-flex; min-width: 44px; min-height: 40px; }
  .nav { display: none; order: 3; flex-basis: 100%; }
  .app-header.menu-open .nav {
    display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 6px; overflow: visible;
    padding: 6px 0 12px; max-height: calc(100dvh - 70px); overflow-y: auto;
  }
  .app-header.menu-open .nav a { padding: 12px 12px; font-size: 15px; background: var(--panel-2); border: 1px solid var(--border); min-height: 44px; display: flex; align-items: center; }
  .app-header.menu-open .nav a.active { box-shadow: inset 3px 0 0 var(--gold); }
  .app-header.menu-open .nav-group-label { display: block; grid-column: 1 / -1; font-size: 11px; text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted); padding: 8px 2px 0; }
  .app-header.menu-open .nav-extra { display: grid; grid-column: 1 / -1; grid-template-columns: 1fr; gap: 6px; }
  .app-header.menu-open .nav-extra .btn { justify-content: flex-start; min-height: 44px; }
  .header-tools .btn-label { display: none; }
  .game-cards, .grid-3 { grid-template-columns: minmax(0, 1fr); }
  .grid-2 { grid-template-columns: minmax(0, 1fr); }
  main { padding: 14px 16px; }
  .hero { padding: 20px; } .hero h1 { font-size: 22px; }
}
@media (max-width: 520px) {
  .hide-sm { display: none; }
  .brand-name { display: none; }
  .bankroll-pill { min-width: 0; padding: 3px 9px; }
  .verdict-grid { grid-template-columns: minmax(0, 1fr); }
  .principle { grid-template-columns: minmax(0,1fr); }
  .chip { width: 38px; height: 38px; font-size: 12px; }
  .panel { padding: 12px; }
  h1 { font-size: 22px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}