* {
    box-sizing: border-box;
}

:root {
    color-scheme: dark;
    --bg: #090d16;
    --panel: rgba(18, 25, 41, 0.88);
    --panel-solid: #121929;
    --text: #f4f7ff;
    --muted: #9aa7bd;
    --line: rgba(255, 255, 255, 0.12);
    --accent: #79f0d2;
    --danger: #ff6b7a;
    --safe-bottom: env(safe-area-inset-bottom, 0px);
    --safe-top: env(safe-area-inset-top, 0px);
}

html,
body {
    width: 100%;
    min-height: 100%;
    margin: 0;
    overflow: hidden;
    background:
        radial-gradient(circle at 50% 0%, #1b2741 0%, var(--bg) 48%),
        var(--bg);
    color: var(--text);
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    touch-action: none;
    overscroll-behavior: none;
    -webkit-tap-highlight-color: transparent;
}

button {
    font: inherit;
}

button:focus-visible {
    outline: 3px solid rgba(121, 240, 210, 0.75);
    outline-offset: 3px;
}

#app {
    width: 100%;
    height: 100dvh;
    display: grid;
    grid-template-rows: auto minmax(0, 1fr) auto;
    padding-top: var(--safe-top);
    padding-bottom: var(--safe-bottom);
}

.hud {
    z-index: 5;
    min-height: 76px;
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 10px;
    align-items: center;
    padding: 10px clamp(10px, 3vw, 24px);
    background: linear-gradient(180deg, rgba(8, 12, 21, 0.98), rgba(8, 12, 21, 0.72));
    border-bottom: 1px solid var(--line);
    backdrop-filter: blur(18px);
}

.hud__group {
    display: flex;
    align-items: center;
    gap: clamp(7px, 2vw, 16px);
}

.hud__group--buttons {
    justify-content: flex-end;
}

.stat {
    min-width: 48px;
}

.stat span,
.next > span {
    display: block;
    margin-bottom: 2px;
    color: var(--muted);
    font-size: 0.67rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.stat strong {
    font-size: clamp(0.95rem, 3vw, 1.35rem);
    font-variant-numeric: tabular-nums;
}

.next {
    display: flex;
    align-items: center;
    gap: 9px;
    padding: 6px 10px;
    border: 1px solid var(--line);
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.055);
}

.next > span {
    margin: 0;
}

.next__ball {
    width: 34px;
    height: 34px;
    display: grid;
    place-items: center;
    border-radius: 50%;
    box-shadow:
        inset 0 3px 8px rgba(255, 255, 255, 0.42),
        inset 0 -5px 8px rgba(0, 0, 0, 0.28),
        0 0 18px rgba(255, 255, 255, 0.2);
    color: white;
    font-weight: 900;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.6);
}

.icon-button {
    min-width: 52px;
    min-height: 42px;
    padding: 7px 10px;
    border: 1px solid var(--line);
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.055);
    color: var(--text);
    cursor: pointer;
}

.icon-button:active,
.primary-button:active,
.secondary-button:active {
    transform: translateY(1px) scale(0.985);
}

.game-shell {
    position: relative;
    min-height: 0;
    width: min(100%, 850px);
    justify-self: center;
    overflow: hidden;
    border-inline: 1px solid rgba(255, 255, 255, 0.08);
    background: #111a2b;
}

#game-canvas {
    width: 100%;
    height: 100%;
    display: block;
    touch-action: none;
    cursor: crosshair;
}

.combo {
    position: absolute;
    top: 18px;
    left: 50%;
    transform: translateX(-50%) scale(0.8);
    opacity: 0;
    pointer-events: none;
    font-size: clamp(1rem, 4vw, 1.55rem);
    font-weight: 900;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    text-shadow: 0 4px 18px rgba(0, 0, 0, 0.45);
    transition: opacity 140ms ease, transform 140ms ease;
}

.combo--visible {
    opacity: 1;
    transform: translateX(-50%) scale(1);
}

.message {
    position: absolute;
    left: 50%;
    bottom: 16%;
    transform: translateX(-50%) translateY(12px);
    min-width: min(84%, 360px);
    padding: 10px 15px;
    border: 1px solid var(--line);
    border-radius: 999px;
    background: rgba(7, 11, 20, 0.82);
    color: var(--text);
    text-align: center;
    opacity: 0;
    pointer-events: none;
    backdrop-filter: blur(10px);
    transition: opacity 180ms ease, transform 180ms ease;
}

.message--visible {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

.overlay {
    position: absolute;
    inset: 0;
    z-index: 20;
    display: grid;
    place-items: center;
    padding: 24px;
    background: rgba(4, 7, 13, 0.76);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    backdrop-filter: blur(12px);
    transition: opacity 180ms ease, visibility 180ms ease;
}

.overlay--visible {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

.dialog {
    width: min(100%, 480px);
    max-height: 92%;
    overflow: auto;
    padding: clamp(24px, 6vw, 42px);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 28px;
    background:
        linear-gradient(145deg, rgba(33, 44, 68, 0.98), rgba(15, 21, 35, 0.98));
    box-shadow: 0 30px 90px rgba(0, 0, 0, 0.48);
    text-align: center;
}

.dialog--small {
    width: min(100%, 360px);
}

.dialog h1,
.dialog h2 {
    margin: 0 0 12px;
    line-height: 1;
}

.dialog h1 {
    font-size: clamp(2.3rem, 11vw, 4.4rem);
    letter-spacing: -0.06em;
}

.dialog h2 {
    font-size: clamp(2rem, 8vw, 3.1rem);
}

.dialog p {
    color: #c3ccdc;
    line-height: 1.55;
}

.eyebrow {
    margin: 0 0 12px !important;
    color: var(--accent) !important;
    font-size: 0.78rem;
    font-weight: 800;
    letter-spacing: 0.13em;
    text-transform: uppercase;
}

.legend {
    display: grid;
    gap: 8px;
    margin: 22px 0;
    text-align: left;
    color: #dce5f7;
    font-size: 0.88rem;
}

.legend span {
    padding: 8px 10px;
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.055);
}

.legend b {
    display: inline-block;
    width: 24px;
    color: var(--accent);
    text-align: center;
}

.primary-button,
.secondary-button {
    width: 100%;
    min-height: 50px;
    margin-top: 10px;
    padding: 12px 18px;
    border-radius: 14px;
    cursor: pointer;
}

.primary-button {
    border: 0;
    background: linear-gradient(135deg, #79f0d2, #54b8ff);
    color: #071019;
    font-weight: 900;
}

.secondary-button {
    border: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.055);
    color: var(--text);
    font-weight: 700;
}

.footer {
    min-height: 62px;
    padding: 8px 14px 10px;
    border-top: 1px solid var(--line);
    background: rgba(8, 12, 21, 0.95);
    text-align: center;
}

.footer p {
    margin: 5px 0 0;
    color: var(--muted);
    font-size: 0.74rem;
}

.unlocks {
    display: flex;
    justify-content: center;
    gap: 5px;
    min-height: 18px;
}

.unlock-dot {
    width: 14px;
    height: 14px;
    border: 2px solid rgba(255, 255, 255, 0.65);
    border-radius: 50%;
    box-shadow: inset 0 2px 4px rgba(255, 255, 255, 0.4);
}

@media (max-width: 640px) {
    .hud {
        min-height: 68px;
        grid-template-columns: 1fr auto;
        grid-template-areas:
            "stats next"
            "buttons buttons";
        gap: 7px 10px;
        padding-block: 7px;
    }

    .hud__group--stats {
        grid-area: stats;
    }

    .next {
        grid-area: next;
        justify-self: end;
    }

    .hud__group--buttons {
        grid-area: buttons;
        justify-content: stretch;
    }

    .icon-button {
        flex: 1;
        min-height: 34px;
        padding-block: 4px;
        font-size: 0.78rem;
    }

    .game-shell {
        border-inline: 0;
    }

    .footer {
        min-height: 54px;
    }
}

@media (max-height: 690px) {
    .footer p {
        display: none;
    }

    .footer {
        min-height: 34px;
    }

    .dialog {
        padding: 20px;
    }

    .dialog h1 {
        font-size: 2.4rem;
    }

    .legend {
        margin-block: 12px;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        scroll-behavior: auto !important;
        transition-duration: 0.001ms !important;
        animation-duration: 0.001ms !important;
        animation-iteration-count: 1 !important;
    }
}


/* Ball limit: clear loss condition */
.stat--capacity {
    min-width: clamp(92px, 14vw, 132px);
}

.stat--capacity strong {
    display: block;
    color: var(--text);
    transition: color 180ms ease, transform 180ms ease;
}

.capacity-meter {
    width: 100%;
    height: 5px;
    margin-top: 4px;
    overflow: hidden;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.11);
}

.capacity-meter i {
    display: block;
    width: 0;
    height: 100%;
    border-radius: inherit;
    background: linear-gradient(90deg, #79f0d2, #54b8ff);
    transition: width 180ms ease, background 180ms ease;
}

.stat--capacity.capacity--warning strong {
    color: #ffd27a;
    transform: scale(1.04);
}

.stat--capacity.capacity--warning .capacity-meter i {
    background: linear-gradient(90deg, #ffcf5a, #ff8c55);
}

.stat--capacity.capacity--critical strong {
    color: #ff7786;
    transform: scale(1.08);
}

.stat--capacity.capacity--critical .capacity-meter i {
    background: linear-gradient(90deg, #ff8b5f, #ff536b);
}

.game-shell {
    transition: box-shadow 180ms ease, border-color 180ms ease;
}

.game-shell--warning {
    border-color: rgba(255, 190, 79, 0.72);
    box-shadow: inset 0 0 34px rgba(255, 172, 56, 0.12);
}

.game-shell--critical {
    border-color: rgba(255, 83, 107, 0.88);
    box-shadow:
        inset 0 0 46px rgba(255, 70, 94, 0.17),
        0 0 24px rgba(255, 70, 94, 0.12);
}

@media (max-width: 640px) {
    .hud__group--stats {
        flex-wrap: wrap;
        row-gap: 4px;
    }

    .stat--capacity {
        min-width: 88px;
        flex: 1 1 88px;
    }
}


/* Antimatter and diamond progression */
.legend span:last-child b {
    color: #6bc8ff;
}


/* Crystal Cannon start modes and highscore list */
.start-actions {
    display: grid;
    gap: 9px;
}

.mode-button {
    display: grid;
    gap: 3px;
    text-align: left;
}

.mode-button strong {
    font-size: 0.98rem;
}

.mode-button small {
    color: var(--muted);
    font-size: 0.76rem;
    line-height: 1.35;
}

.highscore-panel {
    margin-top: 22px;
    padding: 14px;
    border: 1px solid var(--line);
    border-radius: 16px;
    background: rgba(5, 10, 19, 0.28);
    text-align: left;
}

.highscore-panel h2 {
    margin: 0 0 9px;
    font-size: 1rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.highscore-panel ol {
    max-height: 180px;
    margin: 0;
    padding-left: 28px;
    overflow-y: auto;
    color: #dce5f7;
    font-size: 0.82rem;
}

.highscore-panel li {
    padding: 3px 0;
}

.highscore-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 10px;
}

.highscore-row small {
    grid-column: 1 / -1;
    color: var(--muted);
}

.score-submit {
    display: grid;
    gap: 8px;
    margin: 17px 0 6px;
    text-align: left;
}

.score-submit label {
    color: var(--muted);
    font-size: 0.78rem;
}

.score-submit input {
    width: 100%;
    min-height: 46px;
    padding: 10px 12px;
    border: 1px solid var(--line);
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.07);
    color: var(--text);
    font: inherit;
}

.score-submit input:focus {
    border-color: rgba(121, 240, 210, 0.7);
    outline: none;
    box-shadow: 0 0 0 3px rgba(121, 240, 210, 0.12);
}

.score-status {
    min-height: 1.3em;
    margin: 0 !important;
    font-size: 0.78rem;
}

.score-status--error {
    color: #ff8b99 !important;
}

.score-status--success {
    color: #79f0d2 !important;
}


.primary-button:disabled,
.secondary-button:disabled {
    cursor: not-allowed;
    opacity: 0.42;
    transform: none;
}