:root {
    --economy-gold: #ffd54a;
    --economy-green: #55efb0;
    --economy-danger: #ff708c;
}

.visually-hidden {
    position: absolute !important;
    width: 1px !important;
    height: 1px !important;
    padding: 0 !important;
    margin: -1px !important;
    overflow: hidden !important;
    clip: rect(0, 0, 0, 0) !important;
    white-space: nowrap !important;
    border: 0 !important;
}

.economy-page {
    min-height: 100vh;
    padding: 88px 20px 48px;
}

.economy-shell {
    width: min(1040px, 100%);
    margin: 0 auto;
}

.economy-topbar {
    position: fixed;
    z-index: 20;
    top: 0;
    left: 0;
    right: 0;
    min-height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(3, 0, 20, .88);
    border-bottom: 1px solid var(--glass-border);
    backdrop-filter: blur(18px);
}

.economy-topbar__inner {
    width: min(1120px, calc(100% - 32px));
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
}

.economy-brand,
.economy-nav,
.coin-balance {
    display: flex;
    align-items: center;
    gap: 9px;
}

.economy-brand { font-family: var(--font-mono); font-weight: 700; }
.economy-nav { margin-left: auto; }

.economy-nav a,
.economy-back {
    color: var(--color-text-secondary);
    padding: 8px 12px;
    border-radius: var(--radius-full);
}

.economy-nav a:hover,
.economy-back:hover { color: white; background: var(--glass-bg); }

.coin-balance {
    min-width: 86px;
    justify-content: center;
    padding: 8px 13px;
    border: 1px solid rgba(255, 213, 74, .35);
    border-radius: var(--radius-full);
    background: rgba(255, 213, 74, .1);
    color: var(--economy-gold);
    font-weight: 800;
}

.economy-hero { text-align: center; margin: 20px auto 34px; max-width: 760px; }
.economy-kicker { color: var(--economy-gold); font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }
.economy-title { font: 700 clamp(2rem, 6vw, 4.2rem)/1.05 var(--font-mono); margin: 8px 0 14px; }
.economy-subtitle { color: var(--color-text-secondary); font-size: 1.06rem; }

.economy-card {
    background: linear-gradient(145deg, rgba(42, 25, 82, .76), rgba(10, 8, 34, .86));
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    box-shadow: var(--shadow-card);
}

.math-layout { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: 22px; align-items: start; }
.math-card { min-height: 420px; padding: clamp(22px, 5vw, 42px); text-align: center; }
.math-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin-bottom: 32px; }
.math-stat { padding: 12px 8px; border-radius: 14px; background: rgba(255,255,255,.05); }
.math-stat span { display: block; color: var(--color-text-muted); font-size: .78rem; }
.math-stat strong { display: block; margin-top: 2px; font-size: 1.05rem; }
.math-question { font: 700 clamp(2.5rem, 10vw, 5.4rem)/1 var(--font-mono); margin: 44px 0 28px; }
.math-form { display: flex; justify-content: center; gap: 10px; }
.math-input {
    width: min(230px, 55vw);
    padding: 14px 18px;
    border: 1px solid rgba(255,255,255,.2);
    border-radius: 14px;
    background: rgba(0,0,0,.3);
    color: white;
    text-align: center;
    font: 700 1.35rem var(--font-mono);
}
.economy-button {
    padding: 13px 20px;
    border-radius: 14px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    color: white;
    font-weight: 800;
    transition: transform .18s ease, opacity .18s ease;
}
.economy-button:hover:not(:disabled) { transform: translateY(-2px); }
.economy-button:disabled { cursor: not-allowed; opacity: .45; }
.economy-button--gold { color: #211800; background: linear-gradient(135deg, #ffe071, #ffb52e); }
.math-feedback { min-height: 28px; margin-top: 18px; font-weight: 700; }
.math-feedback--good { color: var(--economy-green); }
.math-feedback--bad { color: var(--economy-danger); }

.math-side { padding: 22px; }
.math-side h2 { font: 700 1.15rem var(--font-mono); margin-bottom: 10px; }
.math-side p { color: var(--color-text-secondary); font-size: .94rem; }
.math-side hr { border: 0; border-top: 1px solid var(--glass-border); margin: 20px 0; }
.timer-value { display: block; color: var(--economy-gold); font: 700 1.7rem var(--font-mono); margin: 8px 0 14px; }
.math-side .economy-button { width: 100%; }

.start-panel { padding: 42px 28px; text-align: center; }
.start-panel__icon { font-size: 4rem; }
.start-panel h2 { font: 700 1.7rem var(--font-mono); margin: 8px 0; }
.start-panel p { max-width: 650px; margin: 0 auto 22px; color: var(--color-text-secondary); }

.shop-toolbar { display: flex; justify-content: space-between; align-items: center; gap: 16px; margin-bottom: 22px; }
.shop-toolbar p { color: var(--color-text-secondary); }
.shop-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.shop-item { display: flex; flex-direction: column; padding: 22px; min-height: 300px; }
.shop-item__icon { font-size: 2.8rem; }
.shop-item__game { color: var(--color-accent); font-size: .78rem; font-weight: 800; text-transform: uppercase; margin-top: 12px; }
.shop-item h2 { font: 700 1.25rem var(--font-mono); margin: 5px 0 8px; }
.shop-item p { color: var(--color-text-secondary); font-size: .92rem; flex: 1; }
.shop-item__bottom { display: flex; justify-content: space-between; align-items: center; gap: 10px; margin-top: 22px; }
.shop-price { color: var(--economy-gold); font-weight: 900; white-space: nowrap; }
.shop-owned { color: var(--economy-green); font-weight: 800; }
.shop-message { min-height: 28px; color: var(--economy-gold); font-weight: 700; text-align: center; margin: 14px 0; }

@media (max-width: 820px) {
    .math-layout { grid-template-columns: 1fr; }
    .shop-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 560px) {
    .economy-page { padding-inline: 12px; }
    .economy-brand span:last-child { display: none; }
    .economy-nav a { padding-inline: 7px; font-size: .88rem; }
    .math-stats { grid-template-columns: 1fr 1fr; }
    .math-stat:last-child { grid-column: 1 / -1; }
    .math-form { flex-direction: column; }
    .math-input, .math-form .economy-button { width: 100%; }
    .shop-grid { grid-template-columns: 1fr; }
    .shop-toolbar { align-items: flex-start; flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
    .economy-button { transition: none; }
}

/* Compact shop layout */
.economy-page { padding: 76px 20px 34px; }
.economy-shell { width: min(1120px, 100%); }
.economy-hero {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 220px;
    align-items: center;
    gap: 22px;
    max-width: none;
    margin: 10px 0 22px;
    padding: 22px 24px;
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    background: linear-gradient(120deg, rgba(42, 25, 82, .68), rgba(10, 8, 34, .68));
    text-align: left;
}
.economy-kicker { margin: 0 0 5px; font-size: .72rem; }
.economy-title { margin: 0; font-size: clamp(1.8rem, 4vw, 3.2rem); }
.economy-subtitle { max-width: 620px; margin: 9px 0 0; font-size: .92rem; }
.economy-hero__aside { display: grid; justify-items: end; gap: 5px; padding-left: 18px; border-left: 1px solid var(--glass-border); }
.economy-hero__aside span { color: var(--color-text-muted); font-size: .74rem; }
.economy-hero__aside strong { color: var(--economy-gold); font: 700 1.45rem var(--font-mono); }
.economy-hero__aside .economy-button { margin-top: 5px; padding: 9px 14px; font-size: .82rem; }
.shop-toolbar { margin-bottom: 12px; padding: 12px 0; border-bottom: 1px solid rgba(255,255,255,.08); }
.shop-toolbar__title { margin: 0 0 7px; color: var(--color-text); font-size: .78rem; font-weight: 800; text-transform: uppercase; letter-spacing: .08em; }
.shop-toolbar__hint { max-width: 280px; margin: 0; color: var(--color-text-muted); font-size: .76rem; text-align: right; }
.shop-tabs { display: flex; flex-wrap: wrap; gap: 7px; }
.shop-tab { padding: 8px 12px; border: 1px solid rgba(255,255,255,.12); border-radius: 999px; color: var(--color-text-secondary); background: rgba(255,255,255,.045); font-size: .78rem; cursor: pointer; }
.shop-tab:hover, .shop-tab.is-active { border-color: rgba(94, 225, 255, .55); color: #fff; background: rgba(94, 225, 255, .13); }
.coin-balance small { color: rgba(255,255,255,.55); font-size: .68rem; font-weight: 600; }
.shop-message { min-height: 20px; margin: 8px 0; font-size: .82rem; }
.shop-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; }
.shop-item { min-height: 238px; padding: 16px; border-radius: 18px; }
.shop-item__icon { font-size: 2.2rem; }
.shop-item__game { margin-top: 8px; font-size: .66rem; }
.shop-item__category { display: inline-flex; width: fit-content; margin-top: 6px; padding: 3px 7px; border-radius: 999px; color: #d7c4ff; background: rgba(173,130,255,.12); font-size: .62rem; font-weight: 800; }
.shop-item h2 { font-size: 1rem; margin: 6px 0; }
.shop-item p { font-size: .78rem; line-height: 1.45; }
.shop-item__bottom { margin-top: 14px; }
.shop-item .economy-button { padding: 9px 11px; font-size: .75rem; }
.shop-item--costume { border-color: rgba(255, 213, 74, .25); background: linear-gradient(145deg, rgba(77, 47, 91, .78), rgba(16, 10, 39, .9)); }
.shop-item--character { border-color: rgba(118, 235, 255, .3); background: linear-gradient(145deg, rgba(29, 61, 92, .78), rgba(10, 16, 39, .9)); }
.shop-owned--equipped { color: var(--economy-gold); }
.shop-empty { grid-column: 1 / -1; padding: 28px; color: var(--color-text-muted); text-align: center; }

@media (max-width: 980px) {
    .shop-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (max-width: 820px) {
    .economy-hero { grid-template-columns: 1fr; }
    .economy-hero__aside { justify-items: start; padding: 12px 0 0; border-top: 1px solid var(--glass-border); border-left: 0; }
    .shop-toolbar { align-items: flex-start; }
    .shop-toolbar__hint { max-width: none; text-align: left; }
    .shop-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 560px) {
    .economy-page { padding-top: 70px; }
    .economy-hero { padding: 18px; }
    .shop-grid { grid-template-columns: 1fr; }
    .shop-item { min-height: 0; }
}