:root {
  --ink: #121212;
  --paper: #f6efea;
  --paper-2: #eadbd0;
  --line: #a88f7f;
  --pink: #c98689;
  --success: #2f7b59;
  --success-bg: #e4f0e8;
  --error: #a63e42;
  --error-bg: #f7e5e4;
  --radius: 22px;
}

* { box-sizing: border-box; }

html { min-height: 100%; background: #111; }

body {
  margin: 0;
  min-width: 320px;
  min-height: 100dvh;
  color: var(--ink);
  font-family: Inter, "Helvetica Neue", Arial, sans-serif;
  background: #111;
}

button, input, select { font: inherit; }
button { -webkit-tap-highlight-color: transparent; }

.app {
  position: relative;
  width: min(100%, 480px);
  min-height: 100dvh;
  margin: 0 auto;
  padding: max(22px, env(safe-area-inset-top)) 24px max(28px, env(safe-area-inset-bottom));
  overflow: hidden;
  background:
    linear-gradient(120deg, transparent 0 22%, rgba(255,255,255,.55) 22.4%, transparent 23%) 0 0/190px 190px,
    linear-gradient(150deg, transparent 0 67%, rgba(195,179,169,.25) 67.4%, transparent 68%) 0 0/240px 240px,
    radial-gradient(circle at 80% 18%, rgba(255,255,255,.95), transparent 27%),
    var(--paper);
  box-shadow: 0 0 70px rgba(0,0,0,.45);
}

.app::before, .app::after {
  content: "";
  position: fixed;
  pointer-events: none;
  border: 1px solid rgba(166,145,132,.18);
  border-radius: 50%;
}
.app::before { width: 260px; height: 260px; right: -180px; top: 20%; }
.app::after { width: 170px; height: 170px; left: -120px; bottom: 8%; }

.app-header { position: relative; z-index: 2; text-align: center; }
.wordmark { font-size: clamp(40px, 11vw, 54px); font-weight: 300; letter-spacing: -4px; line-height: 1; }
.mission-pill {
  display: inline-flex;
  margin-top: 26px;
  padding: 8px 24px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: .08em;
}

.screen { display: none; position: relative; z-index: 1; min-height: calc(100dvh - 120px); padding-top: 34px; text-align: center; }
.screen.is-active { display: flex; flex-direction: column; animation: appear .28s ease-out; }
@keyframes appear { from { opacity: 0; transform: translateY(8px); } }

h1 { margin: 0; font-size: clamp(31px, 8.6vw, 44px); line-height: 1.08; font-weight: 500; letter-spacing: .015em; }
.instruction { max-width: 390px; margin: 20px auto 24px; font-size: 17px; line-height: 1.45; }
.eyebrow { color: var(--pink); font-weight: 700; letter-spacing: .03em; }
.lead { max-width: 330px; margin: 24px auto; font-size: 20px; line-height: 1.35; }

.screen--start { justify-content: space-between; }
.screen--start h1 { font-size: clamp(40px, 11vw, 56px); }
.quest-list { display: grid; gap: 12px; margin: 20px 0 28px; padding: 0; list-style: none; text-align: left; }
.quest-list li { display: flex; align-items: center; gap: 14px; font-size: 18px; }
.quest-list span { display: grid; place-items: center; width: 36px; height: 36px; flex: 0 0 auto; border: 1px solid var(--line); border-radius: 50%; }

.primary-button {
  width: 100%; min-height: 64px; margin-top: auto; padding: 16px 22px;
  border: 0; border-radius: 14px; color: white; background: var(--ink);
  font-size: 18px; font-weight: 500; letter-spacing: .025em; cursor: pointer;
}
.primary-button:active { transform: scale(.99); }

.logo-inputs { display: grid; grid-template-columns: repeat(7, 1fr); gap: 7px; margin: auto 0 28px; }
.letter-input { display: grid; gap: 8px; font-size: 18px; }
.letter-input input, .single-input input, .pair-row select {
  width: 100%; min-height: 58px; border: 1px solid var(--line); border-radius: 12px;
  color: var(--ink); background: rgba(255,255,255,.36); text-align: center; outline: 0;
}
.letter-input input { font-size: 24px; }
.single-input input { padding: 0 16px; text-align: left; font-size: 17px; }
input:focus, select:focus { border-color: var(--ink); box-shadow: 0 0 0 2px rgba(18,18,18,.08); }
.is-correct { border-color: var(--success) !important; background: var(--success-bg) !important; }
.is-wrong { border-color: var(--error) !important; background: var(--error-bg) !important; }

.feature-image { display: block; width: 100%; margin: 0 auto 20px; border: 1px solid rgba(168,143,127,.45); border-radius: 18px; object-fit: contain; background: rgba(255,255,255,.45); }
.feature-image--portrait { aspect-ratio: 4 / 5; object-fit: cover; max-height: 48dvh; }
.feature-image--square { aspect-ratio: 1; max-height: 390px; }
.feature-image--product { aspect-ratio: 1; max-height: 370px; padding: 20px; }

.choice-grid { display: grid; gap: 12px; margin: 2px 0 20px; }
.choice-grid--three { grid-template-columns: repeat(3, 1fr); }
.choice-button { min-height: 72px; border: 1px solid rgba(168,143,127,.4); border-radius: 14px; background: var(--paper-2); font-size: 32px; cursor: pointer; }
.choice-button.is-selected { border: 2px solid var(--ink); }

.pair-list { display: grid; gap: 11px; margin: 8px 0 22px; }
.pair-row { display: grid; grid-template-columns: 34px 1fr 22px 1fr; gap: 8px; align-items: center; padding: 3px; border-radius: 14px; }
.pair-number { display: grid; place-items: center; width: 32px; height: 32px; border: 1px solid var(--line); border-radius: 50%; }
.pair-row select { min-height: 54px; padding: 0 8px; font-size: 18px; appearance: auto; }
.pair-dash { font-size: 20px; }

.feedback { min-height: 29px; margin: 3px 0 14px; font-size: 16px; font-weight: 600; }
.feedback.is-success { color: var(--success); }
.feedback.is-error { color: var(--error); }

.screen--completion, .screen--final, .screen--error { justify-content: center; }
.spinner { width: 54px; height: 54px; margin: 0 auto 30px; border: 3px solid rgba(18,18,18,.16); border-top-color: var(--ink); border-radius: 50%; animation: spin .9s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
.sparkle { margin-bottom: 20px; color: var(--pink); font-size: 92px; line-height: 1; }
.final-lead { margin: 26px auto 0; font-size: 24px; line-height: 1.35; }
.error-mark { display: grid; place-items: center; width: 70px; height: 70px; margin: 0 auto 26px; border: 2px solid var(--error); border-radius: 50%; color: var(--error); font-size: 42px; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }

@media (max-height: 700px) {
  .app { padding-top: 16px; }
  .screen { padding-top: 22px; }
  .instruction { margin: 14px auto 18px; font-size: 15px; }
  .feature-image--portrait { max-height: 36dvh; }
  .feature-image--square, .feature-image--product { max-height: 31dvh; }
  .mission-pill { margin-top: 16px; }
}