@font-face {
    font-family: helvetica;
    src: url("fonts/helvetica.ttf");
}

@font-face {
    font-family: helvetica-bold;
    src: url("fonts/helvetica-bold.ttf");
}

:root {
    --bg: #fbfbf9;
    --panel: #ffffff;
    --panel-soft: #f2f2ee;
    --ink: #151515;
    --muted: #626262;
    --line: #1f1f1f;
    --line-soft: #d6d6d0;
    --shadow: rgba(0, 0, 0, 0.09);
    --shadow-strong: rgba(0, 0, 0, 0.14);
    --header-height: 5.75rem;
    --frame-gap: 1rem;
    --radius: 1.25rem;
    --radius-tight: 0.75rem;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    font-size: 16px;
}

body {
    margin: 0;
    min-height: 100vh;
    min-height: 100dvh;
    width: 100vw;
    overflow: hidden;
    font-family: helvetica, Arial, sans-serif;
    font-size: 1rem;
    color: var(--ink);
    background:
        linear-gradient(rgba(0, 0, 0, 0.025) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 0, 0, 0.025) 1px, transparent 1px),
        var(--bg);
    background-size: 1.5rem 1.5rem, 1.5rem 1.5rem, auto;
    transition: background-color 30s ease;
}

h1,
h2,
h3,
p {
    margin: 0;
}

h1,
h2 {
    font-family: helvetica-bold, helvetica, Arial, sans-serif;
    font-weight: 700;
}

h3 {
    font-size: 1rem;
    font-family: helvetica, Arial, sans-serif;
    font-weight: 400;
}

.button {
    appearance: none;
    -webkit-appearance: none;
    width: 100%;
    min-height: 3.75rem;
    padding: 0.95rem 1rem;
    border: 2px solid var(--line);
    border-radius: var(--radius-tight);
    background: var(--panel);
    color: var(--ink);
    font-family: helvetica-bold, helvetica, Arial, sans-serif;
    font-size: 0.95rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    text-align: center;
    text-decoration: none;
    box-shadow: 0 0 0 0 var(--shadow);
    cursor: pointer;
    transition:
        transform 160ms ease,
        background-color 160ms ease,
        color 160ms ease,
        box-shadow 160ms ease;
    touch-action: manipulation;
}

.button:hover,
.button:focus-visible {
    background: var(--ink);
    color: var(--panel);
    box-shadow: 0 14px 28px var(--shadow);
    transform: translateY(-2px);
}

.button:focus-visible {
    outline: 3px solid rgba(0, 0, 0, 0.18);
    outline-offset: 2px;
}

#splashContainer,
#gameOverContainer {
    position: absolute;
    top: 50%;
    left: 50%;
    width: min(94vw, 980px);
    min-height: min(92vh, 780px);
    max-height: calc(100dvh - 1rem);
    transform: translate(-50%, -50%);
    padding: clamp(1.5rem, 4vw, 3rem);
    border: 2px solid var(--line);
    border-radius: 1.5rem;
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.96), rgba(247, 247, 242, 0.96)),
        var(--panel);
    box-shadow: 0 24px 60px var(--shadow-strong);
    z-index: 20;
    overflow-y: auto;
}

#splashText {
    max-width: 42rem;
    margin: 0 auto;
    padding-top: clamp(1rem, 6vh, 4rem);
    text-align: center;
}

.splash-kicker {
    margin-bottom: 0.85rem;
    font-size: 0.82rem;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    color: var(--muted);
}

#splashText h1 {
    font-size: clamp(3rem, 8vw, 5.8rem);
    letter-spacing: -0.05em;
    line-height: 0.95;
}

.splash-summary {
    max-width: 28rem;
    margin: 1.25rem auto 0;
    font-size: clamp(1rem, 2vw, 1.3rem);
    line-height: 1.6;
    color: var(--muted);
}

#modeSelect {
    max-width: 42rem;
    margin: clamp(2rem, 8vh, 5rem) auto 0;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
}

.mode-button {
    min-height: 12rem;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    justify-content: space-between;
    text-align: left;
}

.button-title {
    display: block;
    font-size: 1.2rem;
    line-height: 1.2;
}

.button-meta {
    display: block;
    font-family: helvetica, Arial, sans-serif;
    font-size: 0.9rem;
    font-weight: 400;
    letter-spacing: 0;
    line-height: 1.45;
    text-transform: none;
}

#gameContainer {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    display: none;
    background: var(--panel);
    border: 2px solid var(--line);
    border-radius: 1.5rem;
    box-shadow: 0 24px 60px var(--shadow-strong);
    overflow: hidden;
    touch-action: manipulation;
}

#menu,
#legendOfMarbles {
    position: absolute;
    inset: 1rem;
    z-index: 100;
    display: none;
    padding: 1.2rem;
    border: 2px solid var(--line);
    border-radius: 1.25rem;
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(244, 244, 239, 0.98)),
        var(--panel);
    box-shadow: 0 24px 50px rgba(0, 0, 0, 0.16);
    overflow-y: auto;
}

#menu > * + *,
#legendOfMarbles > * + * {
    margin-top: 0.9rem;
}

.panel-heading {
    font-family: helvetica-bold, helvetica, Arial, sans-serif;
    font-size: 1.55rem;
    letter-spacing: -0.03em;
}

.panel-copy {
    max-width: 32rem;
    font-size: 0.98rem;
    line-height: 1.55;
    color: var(--muted);
}

#window-dropInterval,
#button_openLegend,
#button_closeLegend,
#button_start,
#button_continue,
#button_mute,
#button_quit {
    margin: 0;
}

#window-dropInterval {
    cursor: default;
    display: block;
    text-transform: none;
    letter-spacing: 0;
    text-align: left;
    font-family: helvetica, Arial, sans-serif;
    font-size: 1rem;
    line-height: 1.45;
}

#window-dropInterval:hover,
#window-dropInterval:focus-visible {
    background: var(--panel);
    color: var(--ink);
    transform: none;
    box-shadow: none;
}

#input-dropInterval {
    width: 100%;
    margin-top: 0.8rem;
    padding: 0.85rem 0.9rem;
    border: 2px solid var(--line);
    border-radius: 0.75rem;
    background: var(--panel-soft);
    color: var(--ink);
    font-family: helvetica-bold, helvetica, Arial, sans-serif;
    font-size: 1rem;
}

#header {
    position: absolute;
    top: var(--frame-gap);
    left: var(--frame-gap);
    right: var(--frame-gap);
    height: var(--header-height);
    padding: 0.55rem 0.75rem;
    display: grid;
    grid-template-columns: 3.2rem minmax(0, 1fr) minmax(0, 1fr) 3.2rem;
    gap: 0.75rem;
    align-items: stretch;
    z-index: 50;
    border: 2px solid var(--line);
    border-radius: 1rem;
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 10px 24px var(--shadow);
}

#window_pause,
#window_menu,
#window_lifetimeScore,
#window_currentScore {
    position: relative;
    background: transparent;
}

#window_pause,
#window_menu {
    display: grid;
    place-items: center;
    border: 1px solid var(--line-soft);
    border-radius: 0.8rem;
    background: var(--panel-soft);
}

#button_pause,
#button_play,
#button_openMenu {
    position: static;
    width: 2rem;
    height: 2rem;
    touch-action: manipulation;
}

#button_pause {
    display: block;
}

#button_play {
    display: none;
}

#window_lifetimeScore,
#window_currentScore {
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 0.35rem 0.75rem;
    border: 1px solid var(--line-soft);
    border-radius: 0.8rem;
    background: #fff;
}

#label_lifetimeScore,
#label_currentScore {
    position: static;
    font-size: 0.72rem;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--muted);
}

#value_lifetimeScore,
#value_currentScore {
    position: static;
    margin-top: 0.2rem;
    font-family: helvetica-bold, helvetica, Arial, sans-serif;
    font-size: clamp(1.15rem, 2vw, 1.7rem);
    letter-spacing: -0.04em;
    color: var(--ink);
}

#canvas_div {
    position: absolute;
    top: calc(var(--header-height) + (var(--frame-gap) * 2));
    right: var(--frame-gap);
    bottom: var(--frame-gap);
    left: var(--frame-gap);
    z-index: 1;
}

#canvas {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    transform: none;
    border: 2px solid var(--line);
    border-radius: 1.1rem;
    background: #fff;
    box-sizing: border-box;
    touch-action: none;
}

#gameOverContainer {
    display: none;
    text-align: center;
}

#gameOverWinTextNoTip,
#gameOverWinTextTipJar,
#gameOverLoseText {
    display: none;
    max-width: 34rem;
    margin: 18vh auto 0;
    font-size: clamp(1.35rem, 2.5vw, 2.2rem);
    line-height: 1.45;
}

#tipDevs,
#startGameNoTip,
#startGameTipNextTime,
#startGameTipJar {
    width: min(100%, 18rem);
    margin: 1rem auto 0;
}

#thankYouMessage {
    max-width: 28rem;
    margin: 2rem auto 0;
    font-size: 1rem;
    line-height: 1.6;
    color: var(--muted);
}

.legend {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.85rem;
    margin: 0;
    padding: 0;
    border: 0;
    max-width: none;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 0.9rem;
    min-height: 4.5rem;
    padding: 0.8rem 0.9rem;
    border: 1px solid var(--line-soft);
    border-radius: 0.9rem;
    background: var(--panel);
}

.legend-item img {
    width: 2.8rem;
    height: 2.8rem;
    margin: 0;
    object-fit: contain;
}

.legend-item span {
    font-size: 0.95rem;
    line-height: 1.4;
}

@media (max-width: 900px) {
    #splashContainer,
    #gameOverContainer {
        width: calc(100vw - 1rem);
        min-height: calc(100dvh - 1rem);
        border-radius: 1rem;
    }

    #modeSelect,
    .legend {
        grid-template-columns: 1fr;
    }

    .mode-button {
        min-height: 9rem;
    }
}

@media (max-width: 680px) {
    :root {
        --header-height: 7.4rem;
        --frame-gap: 0.7rem;
    }

    body {
        background-size: 1rem 1rem, 1rem 1rem, auto;
    }

    #splashContainer,
    #gameOverContainer {
        width: calc(100vw - 0.5rem);
        max-height: calc(100dvh - 0.5rem);
        padding: 1rem;
        border-radius: 0.9rem;
    }

    #splashText {
        padding-top: 0.5rem;
    }

    .splash-summary {
        max-width: 24rem;
    }

    #modeSelect {
        margin-top: 1.5rem;
        gap: 0.75rem;
    }

    .button {
        font-size: 0.88rem;
        min-height: 3.4rem;
        padding: 0.85rem 0.9rem;
    }

    #header {
        grid-template-columns: 3rem 1fr 3rem;
        grid-template-areas:
            "pause lifetime menu"
            "pause current menu";
        height: var(--header-height);
        gap: 0.5rem;
    }

    #window_pause {
        grid-area: pause;
    }

    #window_lifetimeScore {
        grid-area: lifetime;
    }

    #window_currentScore {
        grid-area: current;
    }

    #window_menu {
        grid-area: menu;
    }

    #label_lifetimeScore,
    #label_currentScore {
        font-size: 0.65rem;
    }

    #value_lifetimeScore,
    #value_currentScore {
        font-size: 1.05rem;
    }

    #menu,
    #legendOfMarbles {
        inset: 0.7rem;
        padding: 1rem;
        border-radius: 0.95rem;
    }

    .panel-heading {
        font-size: 1.3rem;
    }

    .panel-copy,
    .legend-item span {
        font-size: 0.9rem;
    }

    .legend-item {
        min-height: 4rem;
        padding: 0.7rem 0.75rem;
    }

    .legend-item img {
        width: 2.35rem;
        height: 2.35rem;
    }

    #gameOverWinTextNoTip,
    #gameOverWinTextTipJar,
    #gameOverLoseText {
        margin-top: 10vh;
        font-size: clamp(1.15rem, 6vw, 1.6rem);
    }
}

@media (max-width: 480px) {
    :root {
        --header-height: 7.9rem;
        --frame-gap: 0.45rem;
    }

    #header {
        padding: 0.45rem;
        gap: 0.4rem;
        border-radius: 0.8rem;
    }

    #window_pause,
    #window_menu,
    #window_lifetimeScore,
    #window_currentScore {
        border-radius: 0.65rem;
    }

    #button_pause,
    #button_play,
    #button_openMenu {
        width: 1.65rem;
        height: 1.65rem;
    }

    #label_lifetimeScore,
    #label_currentScore {
        font-size: 0.58rem;
        letter-spacing: 0.12em;
    }

    #value_lifetimeScore,
    #value_currentScore {
        font-size: 0.98rem;
    }

    #canvas {
        border-radius: 0.8rem;
    }
}