:root {
    color-scheme: dark;
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    --ink: #f7fbff;
    --muted: rgba(229, 243, 255, 0.66);
    --line: rgba(255, 255, 255, 0.16);
    --panel: rgba(7, 19, 38, 0.76);
    --cyan: #76f6ff;
    --gold: #ffd76a;
    --violet: #9f8cff;
}

* {
    box-sizing: border-box;
}

html,
body {
    width: 100%;
    min-height: 100%;
    margin: 0;
    overflow: hidden;
    background: #06152d;
}

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

button {
    border: 0;
}

button:focus-visible,
a:focus-visible {
    outline: 2px solid var(--cyan);
    outline-offset: 3px;
}

[hidden] {
    display: none !important;
}

.flappy-app {
    position: fixed;
    inset: 0;
    isolation: isolate;
    overflow: hidden;
    background:
        radial-gradient(circle at 76% 28%, rgba(255, 231, 156, 0.84), transparent 13%),
        linear-gradient(180deg, #194475 0%, #428eb4 48%, #b7e3d3 82%, #f9df9b 100%);
    color: var(--ink);
    user-select: none;
}

#gameCanvas {
    position: absolute;
    inset: 0;
    z-index: 1;
    width: 100%;
    height: 100%;
    touch-action: none;
}

.sky-haze,
.game-vignette,
.screen-flash {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.sky-haze {
    z-index: 0;
    background:
        radial-gradient(circle at 15% 16%, rgba(119, 231, 255, 0.3), transparent 24%),
        radial-gradient(circle at 82% 72%, rgba(255, 200, 119, 0.24), transparent 28%);
}

.game-vignette {
    z-index: 2;
    background:
        linear-gradient(180deg, rgba(0, 11, 31, 0.2), transparent 20%, transparent 72%, rgba(6, 21, 31, 0.38)),
        radial-gradient(ellipse at center, transparent 52%, rgba(0, 10, 28, 0.42));
}

.screen-flash {
    z-index: 14;
    background: rgba(255, 245, 185, 0.58);
    opacity: 0;
    transition: opacity 140ms ease;
}

.screen-flash.is-active {
    opacity: 1;
    transition-duration: 35ms;
}

.game-header {
    position: fixed;
    z-index: 8;
    top: max(14px, env(safe-area-inset-top));
    right: 16px;
    left: 16px;
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: 14px;
    pointer-events: none;
}

.game-brand,
.hud-stats,
.hud-actions,
.shield-meter,
.dash-meter {
    border: 1px solid var(--line);
    background: rgba(6, 20, 39, 0.7);
    box-shadow: 0 18px 60px rgba(3, 13, 29, 0.24);
    backdrop-filter: blur(18px) saturate(1.25);
}

.game-brand {
    display: inline-flex;
    align-items: center;
    width: max-content;
    gap: 10px;
    padding: 7px 12px 7px 8px;
    border-radius: 14px;
    color: var(--ink);
    text-decoration: none;
    pointer-events: auto;
}

.brand-mark {
    display: grid;
    place-items: center;
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: linear-gradient(145deg, var(--cyan), #5492ff 55%, var(--violet));
    color: #06132a;
    font-weight: 1000;
    letter-spacing: -0.08em;
    box-shadow: inset 0 1px rgba(255, 255, 255, 0.6), 0 0 24px rgba(118, 246, 255, 0.32);
}

.brand-mark span {
    font-size: 0.56em;
    transform: translateY(2px);
}

.brand-copy strong,
.brand-copy small {
    display: block;
}

.brand-copy strong {
    font-size: 0.76rem;
    letter-spacing: 0.04em;
}

.brand-copy small {
    margin-top: 3px;
    color: var(--muted);
    font: 700 0.5rem/1 ui-monospace, monospace;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.hud-stats {
    justify-self: center;
    display: grid;
    grid-template-columns: repeat(5, minmax(64px, 90px));
    padding: 6px;
    border-radius: 15px;
}

.hud-stats div {
    padding: 5px 12px;
    text-align: center;
}

.hud-stats div + div {
    border-left: 1px solid rgba(255, 255, 255, 0.12);
}

.hud-stats span,
.hud-stats strong {
    display: block;
}

.hud-stats span {
    color: var(--muted);
    font: 700 0.48rem/1 ui-monospace, monospace;
    letter-spacing: 0.13em;
    text-transform: uppercase;
}

.hud-stats strong {
    margin-top: 5px;
    font-size: 1rem;
    line-height: 1;
}

.hud-actions {
    display: flex;
    gap: 5px;
    padding: 5px;
    border-radius: 14px;
    pointer-events: auto;
}

.hud-actions button {
    display: grid;
    place-items: center;
    width: 39px;
    height: 39px;
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.06);
    color: var(--ink);
    cursor: pointer;
    font-weight: 900;
}

.hud-actions button:hover {
    background: rgba(118, 246, 255, 0.16);
}

.shield-meter {
    position: fixed;
    z-index: 8;
    right: 18px;
    bottom: max(18px, env(safe-area-inset-bottom));
    display: grid;
    grid-template-columns: 38px auto;
    align-items: center;
    width: 210px;
    gap: 0 10px;
    padding: 9px 12px 11px 9px;
    border-radius: 15px;
    pointer-events: none;
}

.shield-meter.is-ready {
    border-color: rgba(255, 215, 106, 0.58);
    box-shadow: 0 0 36px rgba(255, 215, 106, 0.22);
}

.shield-icon {
    grid-row: 1 / 3;
    display: grid;
    place-items: center;
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: rgba(255, 215, 106, 0.12);
    color: var(--gold);
    font-size: 1.45rem;
    text-shadow: 0 0 15px rgba(255, 215, 106, 0.72);
}

.shield-meter small,
.shield-meter strong {
    display: block;
}

.shield-meter small {
    color: var(--muted);
    font: 700 0.46rem/1 ui-monospace, monospace;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.shield-meter strong {
    margin-top: 4px;
    font-size: 0.68rem;
}

.shield-meter i {
    grid-column: 2;
    display: block;
    height: 3px;
    margin-top: 7px;
    overflow: hidden;
    border-radius: 99px;
    background: rgba(255, 255, 255, 0.12);
}

.shield-meter b {
    display: block;
    width: 0;
    height: 100%;
    border-radius: inherit;
    background: linear-gradient(90deg, var(--gold), #fff4ad);
    box-shadow: 0 0 10px var(--gold);
    transition: width 220ms ease;
}

.dash-meter {
    position: fixed;
    z-index: 8;
    bottom: max(18px, env(safe-area-inset-bottom));
    left: 18px;
    display: grid;
    grid-template-columns: auto 92px;
    align-items: center;
    gap: 9px;
    padding: 6px;
    border-radius: 15px;
    pointer-events: auto;
}

.dash-meter.is-active {
    border-color: rgba(118, 246, 255, 0.72);
    box-shadow: 0 0 38px rgba(118, 246, 255, 0.28);
}

.dash-meter button {
    min-width: 86px;
    min-height: 43px;
    padding: 6px 11px;
    border-radius: 10px;
    background: linear-gradient(135deg, rgba(118, 246, 255, 0.92), rgba(124, 105, 255, 0.92));
    color: #06132a;
    cursor: pointer;
    font-weight: 950;
    text-transform: uppercase;
}

.dash-meter button:disabled {
    cursor: wait;
    filter: saturate(0.45);
    opacity: 0.72;
}

.dash-meter button span,
.dash-meter button small,
.dash-meter strong {
    display: block;
}

.dash-meter button small {
    margin-top: 3px;
    font: 750 0.45rem/1 ui-monospace, monospace;
    letter-spacing: 0.08em;
}

.dash-meter strong {
    color: #eaffff;
    font: 750 0.58rem/1 ui-monospace, monospace;
    letter-spacing: 0.05em;
    text-align: right;
}

.dash-meter i {
    display: block;
    height: 4px;
    margin-top: 7px;
    overflow: hidden;
    border-radius: 99px;
    background: rgba(255, 255, 255, 0.12);
}

.dash-meter b {
    display: block;
    width: 100%;
    height: 100%;
    border-radius: inherit;
    background: linear-gradient(90deg, var(--violet), var(--cyan));
    box-shadow: 0 0 11px var(--cyan);
}

.flight-message {
    position: fixed;
    z-index: 9;
    top: 112px;
    left: 50%;
    padding: 8px 13px;
    border: 1px solid rgba(255, 255, 255, 0.16);
    border-radius: 999px;
    background: rgba(7, 20, 38, 0.72);
    color: #fff6cc;
    font: 800 0.6rem/1 ui-monospace, monospace;
    letter-spacing: 0.08em;
    opacity: 0;
    pointer-events: none;
    transform: translate(-50%, -8px);
    transition: opacity 160ms ease, transform 160ms ease;
    backdrop-filter: blur(14px);
}

.flight-message.is-visible {
    opacity: 1;
    transform: translate(-50%, 0);
}

.tap-prompt {
    position: fixed;
    z-index: 7;
    bottom: max(22px, env(safe-area-inset-bottom));
    left: 50%;
    color: rgba(255, 255, 255, 0.82);
    text-align: center;
    pointer-events: none;
    transform: translateX(-50%);
    animation: prompt-bob 1.25s ease-in-out infinite;
}

.tap-prompt span,
.tap-prompt strong {
    display: block;
}

.tap-prompt span {
    font: 750 0.48rem/1 ui-monospace, monospace;
    letter-spacing: 0.17em;
}

.tap-prompt strong {
    margin-top: 7px;
    font-size: 0.78rem;
}

.game-overlay {
    position: fixed;
    z-index: 12;
    inset: 0;
    display: grid;
    place-items: center;
    padding: 86px 18px 22px;
    background: rgba(3, 12, 29, 0.28);
    backdrop-filter: blur(6px);
}

.overlay-card {
    width: min(650px, 100%);
    max-height: calc(100vh - 118px);
    overflow: auto;
    padding: clamp(26px, 5vw, 48px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 27px;
    background:
        radial-gradient(circle at 80% 0%, rgba(118, 246, 255, 0.14), transparent 38%),
        linear-gradient(145deg, rgba(8, 24, 48, 0.94), rgba(5, 13, 31, 0.96));
    box-shadow: 0 34px 100px rgba(1, 9, 24, 0.48), inset 0 1px rgba(255, 255, 255, 0.12);
}

.eyebrow {
    display: block;
    color: var(--cyan);
    font: 800 0.59rem/1 ui-monospace, monospace;
    letter-spacing: 0.14em;
    text-transform: uppercase;
}

.overlay-card h1,
.overlay-card h2,
.overlay-card p {
    margin: 0;
}

.overlay-card h1 {
    margin-top: 13px;
    font-size: clamp(4.5rem, 13vw, 8.5rem);
    font-weight: 1000;
    line-height: 0.78;
    letter-spacing: -0.09em;
}

.overlay-card h1 i {
    color: var(--cyan);
    font-size: 0.6em;
    font-style: normal;
    text-shadow: 0 0 34px rgba(118, 246, 255, 0.5);
}

.overlay-card h2 {
    max-width: 13ch;
    margin-top: 13px;
    font-size: clamp(2rem, 7vw, 4rem);
    line-height: 0.95;
    letter-spacing: -0.055em;
}

.overlay-card > p {
    max-width: 58ch;
    margin-top: 22px;
    color: var(--muted);
    font-size: 0.94rem;
    line-height: 1.65;
}

.feature-grid,
.result-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 8px;
    margin: 27px 0;
}

.feature-grid div,
.result-grid div {
    min-width: 0;
    padding: 13px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 13px;
    background: rgba(255, 255, 255, 0.04);
}

.feature-grid span,
.feature-grid strong,
.feature-grid small,
.result-grid span,
.result-grid strong {
    display: block;
}

.feature-grid span,
.result-grid span {
    color: var(--cyan);
    font: 800 0.5rem/1 ui-monospace, monospace;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.feature-grid strong {
    margin-top: 9px;
    font-size: 0.78rem;
}

.feature-grid small {
    margin-top: 5px;
    color: var(--muted);
    font-size: 0.64rem;
    line-height: 1.35;
}

.primary-button,
.secondary-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 50px;
    padding: 0 22px;
    border-radius: 13px;
    cursor: pointer;
    font-weight: 900;
    text-decoration: none;
}

.primary-button {
    background: linear-gradient(135deg, var(--cyan), #8fb2ff);
    color: #07152c;
    box-shadow: 0 14px 38px rgba(91, 216, 255, 0.2);
}

.primary-button:hover {
    filter: brightness(1.08);
    transform: translateY(-1px);
}

.start-actions,
.result-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.secondary-button {
    border: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.055);
    color: var(--ink);
}

.best-note {
    margin-left: 13px;
    color: var(--muted);
    font: 700 0.58rem/1 ui-monospace, monospace;
}

.compact-card {
    width: min(500px, 100%);
}

.compact-card .primary-button {
    margin-top: 26px;
}

.result-grid {
    grid-template-columns: repeat(5, minmax(0, 1fr));
}

.result-grid strong {
    margin-top: 8px;
    font-size: 1.3rem;
}

.store-card {
    width: min(900px, 100%);
}

.store-heading {
    display: flex;
    align-items: start;
    justify-content: space-between;
    gap: 20px;
}

.store-heading h2 {
    max-width: none;
}

.store-balance {
    min-width: 118px;
    padding: 12px 14px;
    border: 1px solid rgba(159, 140, 255, 0.34);
    border-radius: 14px;
    background: rgba(159, 140, 255, 0.1);
    text-align: right;
}

.store-balance span,
.store-balance strong {
    display: block;
}

.store-balance span {
    color: var(--muted);
    font: 750 0.5rem/1 ui-monospace, monospace;
    letter-spacing: 0.11em;
    text-transform: uppercase;
}

.store-balance strong {
    margin-top: 7px;
    color: #dcd4ff;
    font-size: 1rem;
}

.store-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 9px;
    margin: 24px 0;
}

.store-upgrade {
    position: relative;
    min-width: 0;
    padding: 17px;
    border: 1px solid rgba(255, 255, 255, 0.11);
    border-radius: 15px;
    background: rgba(255, 255, 255, 0.04);
}

.store-upgrade.is-owned {
    border-color: rgba(118, 246, 255, 0.33);
    background: rgba(118, 246, 255, 0.065);
}

.store-upgrade span,
.store-upgrade strong,
.store-upgrade p {
    display: block;
}

.store-upgrade > span {
    color: var(--violet);
    font: 800 0.5rem/1 ui-monospace, monospace;
    letter-spacing: 0.11em;
    text-transform: uppercase;
}

.store-upgrade > strong {
    margin-top: 8px;
    font-size: 0.9rem;
}

.store-upgrade p {
    min-height: 2.9em;
    margin: 8px 0 15px;
    color: var(--muted);
    font-size: 0.7rem;
    line-height: 1.45;
}

.store-upgrade button {
    width: 100%;
    min-height: 38px;
    border: 1px solid rgba(159, 140, 255, 0.34);
    border-radius: 10px;
    background: rgba(159, 140, 255, 0.12);
    color: #f2efff;
    cursor: pointer;
    font-size: 0.68rem;
    font-weight: 850;
}

.store-upgrade button:disabled {
    cursor: default;
    opacity: 0.5;
}

.store-upgrade.is-owned button {
    border-color: rgba(118, 246, 255, 0.24);
    background: rgba(118, 246, 255, 0.09);
    color: var(--cyan);
}

@keyframes prompt-bob {
    50% { transform: translate(-50%, -7px); }
}

@media (max-width: 760px) {
    .game-header {
        grid-template-columns: auto 1fr auto;
        gap: 7px;
        top: max(8px, env(safe-area-inset-top));
        right: 8px;
        left: 8px;
    }

    .brand-copy {
        display: none;
    }

    .game-brand {
        padding-right: 8px;
    }

    .brand-mark {
        width: 35px;
        height: 35px;
    }

    .hud-stats {
        grid-template-columns: repeat(3, minmax(46px, 1fr));
        width: 100%;
    }

    .hud-stats div {
        padding-inline: 6px;
    }

    .hud-stats div:nth-child(2),
    .hud-stats div:nth-child(4) {
        display: none;
    }

    .hud-actions button {
        width: 35px;
        height: 35px;
    }

    .hud-actions button:first-child {
        display: none;
    }

    .shield-meter {
        right: 8px;
        bottom: max(8px, env(safe-area-inset-bottom));
        width: 178px;
    }

    .dash-meter {
        bottom: max(8px, env(safe-area-inset-bottom));
        left: 8px;
        grid-template-columns: auto 52px;
    }

    .dash-meter button {
        min-width: 68px;
    }

    .dash-meter button small {
        display: none;
    }

    .tap-prompt {
        bottom: max(72px, calc(env(safe-area-inset-bottom) + 72px));
    }

    .flight-message {
        top: 78px;
    }

    .game-overlay {
        padding: 70px 10px 10px;
    }

    .overlay-card {
        max-height: calc(100vh - 80px);
        padding: 25px 20px;
        border-radius: 21px;
    }

    .feature-grid {
        grid-template-columns: 1fr;
        margin-block: 20px;
    }

    .feature-grid div {
        display: grid;
        grid-template-columns: 28px 1fr;
        align-items: center;
        gap: 3px 8px;
        padding: 9px 11px;
    }

    .feature-grid span {
        grid-row: 1 / 3;
    }

    .feature-grid strong,
    .feature-grid small {
        margin: 0;
    }

    .best-note {
        display: block;
        margin: 13px 0 0;
    }

    .store-heading {
        align-items: center;
    }

    .store-heading h2 {
        font-size: 2.4rem;
    }

    .store-grid {
        grid-template-columns: 1fr;
        margin-block: 18px;
    }

    .store-upgrade {
        padding: 13px;
    }

    .store-upgrade p {
        min-height: 0;
    }

    .result-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-height: 650px) and (orientation: landscape) {
    .game-overlay {
        place-items: center;
        padding: 65px 12px 8px;
    }

    .overlay-card {
        display: grid;
        grid-template-columns: 1fr auto;
        width: min(850px, 100%);
        gap: 10px 28px;
        padding: 22px 27px;
    }

    .overlay-card h1,
    .overlay-card h2,
    .overlay-card > p,
    .overlay-card .eyebrow {
        grid-column: 1;
    }

    .feature-grid,
    .result-grid {
        grid-column: 2;
        grid-row: 1 / 5;
        align-self: center;
        width: 310px;
        margin: 0;
    }

    .primary-button,
    .start-actions,
    .result-actions {
        grid-column: 1;
        justify-self: start;
    }

    .best-note {
        grid-column: 1;
        margin: 0;
    }

    .store-card {
        display: block;
        width: min(900px, 100%);
    }

    .store-card .store-grid {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        width: auto;
        margin: 16px 0;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        scroll-behavior: auto !important;
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}