/* SUSHI48 ------------------------------------------------------------------
   The palette takes its cue from the artwork: pale green ground, cream
   plates, and a single warm red used sparingly as an accent. Borders are
   hairline and tinted rather than solid red, so the sushi stays the loudest
   thing on the page. */

:root {
    --bg: #e1efc7;
    --panel: rgba(255, 255, 255, 0.86);
    --panel-solid: #ffffff;
    --ink: #232d1b;
    --muted: #6b7a5b;
    --line: rgba(52, 70, 36, 0.30);
    --line-strong: rgba(52, 70, 36, 0.52);
    --accent: #d33f2a;
    --verified: #2f8f66;
    --shadow: 0 1px 2px rgba(45, 62, 32, 0.10), 0 5px 16px rgba(45, 62, 32, 0.11);
    --radius: 14px;

    /* The board sets the width everything else lines up to. */
    --board: min(360px, 86vw);
}

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

html {
    background-color: var(--bg);
}

body {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 22px;
    min-height: 100vh;
    margin: 0;
    padding: 28px 18px 36px;
    background-color: var(--bg);
    color: var(--ink);
    font-family: 'Noto Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    -webkit-text-size-adjust: 100%;
}

a {
    color: var(--accent);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

/* header ------------------------------------------------------------------
   A three-item row on one baseline. Everything shares a height so the title,
   score and button line up instead of floating at their own offsets. */

.game-header {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 14px;
    width: 100%;
    /* Board (360) + gap (22) + leaderboard (325): keeps the header's outer
       edges flush with the content beneath it. */
    max-width: 707px;
}

h1 {
    display: flex;
    align-items: center;
    gap: 10px;
    flex: 1 1 auto;
    margin: 0;
    font-size: clamp(26px, 7vw, 40px);
    line-height: 1;
    letter-spacing: -0.5px;
}

.logo {
    /* Tracks the wordmark rather than sitting at a fixed size. */
    width: clamp(38px, 9vw, 52px);
    height: auto;
    flex: 0 0 auto;
}

.red {
    color: var(--accent);
}

.score-counter {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2px;
    min-width: 86px;
    height: 54px;
    padding: 0 14px;
    border: 1px solid var(--line-strong);
    border-radius: var(--radius);
    background-color: var(--panel);
    box-shadow: var(--shadow);
}

.score-counter > div:first-child {
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 1.5px;
    color: var(--muted);
}

#score {
    font-size: 22px;
    font-weight: 700;
    line-height: 1;
    color: var(--accent);
    font-variant-numeric: tabular-nums;
}

/* buttons */

.button {
    height: 54px;
    padding: 0 18px;
    border: 1px solid var(--line-strong);
    border-radius: var(--radius);
    background-color: var(--panel-solid);
    color: var(--ink);
    font-family: inherit;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 1.5px;
    cursor: pointer;
    box-shadow: var(--shadow);
    transition: background-color 0.15s, color 0.15s, border-color 0.15s;
}

.button:hover:not(:disabled) {
    border-color: var(--accent);
    color: var(--accent);
}

.button:active:not(:disabled) {
    transform: translateY(1px);
}

.button:disabled {
    opacity: 0.45;
    cursor: default;
}

/* layout ------------------------------------------------------------------
   Board and leaderboard sit side by side on wide screens and stack on narrow
   ones, both aligned to the same top edge. */

.layout {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    flex-wrap: wrap;
    gap: 22px;
    width: 100%;
}

/* board */

#g2048 {
    /* Stops the browser panning or zooming the page mid-swipe. */
    touch-action: none;
    -webkit-user-select: none;
    user-select: none;
}

.game-container {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
    width: var(--board);
    aspect-ratio: 1;
    padding: 8px;
    border: 1px solid var(--line);
    border-radius: 18px;
    background-color: rgba(255, 255, 255, 0.52);
    box-shadow: var(--shadow);
}

.cell {
    position: relative;
    border-radius: 10px;
    background-image: url('./assets/plate.png');
    background-position: center;
    background-repeat: no-repeat;
    background-size: contain;
}

.tile {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background-position: center;
    background-repeat: no-repeat;
    background-size: contain;
}

/* Past nigiri-uni there is no art left, so a high tile reuses the uni plate
   and labels itself. The engine caps tiles at 2048, so this is a safety net
   rather than something reachable in normal play. */
.tile-high {
    color: white;
    font-size: 20px;
    font-weight: 700;
    text-shadow: 0 0 4px rgba(0, 0, 0, 0.9), 0 0 9px rgba(0, 0, 0, 0.7);
}

.poof {
    pointer-events: none;
}

/* the sushi */

.two { background-image: url('./assets/maki-1.png'); }
.four { background-image: url('./assets/maki-2.png'); }
.eight { background-image: url('./assets/maki-3.png'); }
.sixteen { background-image: url('./assets/maki-4.png'); }
.thirty-two { background-image: url('./assets/maki-5.png'); }
.sixty-four { background-image: url('./assets/maki-6.png'); }
.one-twenty-eight { background-image: url('./assets/handroll-1.png'); }
.two-fifty-six { background-image: url('./assets/handroll-2.png'); }
.five-twelve { background-image: url('./assets/handroll-3.png'); }
.ten-twenty-four { background-image: url('./assets/nigiri-toro.png'); }
.twenty-forty-eight { background-image: url('./assets/nigiri-uni.png'); }

/* leaderboard */

.leaderboard {
    display: flex;
    flex-direction: column;
    width: 325px;
    max-width: 100%;
    /* Match the board exactly, so the two cards share a bottom edge however
       many scores there are. */
    height: var(--board);
    padding: 16px 18px;
    border: 1px solid var(--line-strong);
    border-radius: 18px;
    background-color: var(--panel);
    box-shadow: var(--shadow);
}

.leaderboard h2 {
    margin: 0 0 12px;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 2px;
    text-align: center;
    color: var(--accent);
}

.leaderboard ol {
    counter-reset: rank;
    list-style: none;
    margin: 0;
    /* Keeps the scrollbar clear of the score column. */
    padding: 0 14px 0 0;
    flex: 1;
    min-height: 0;
    overflow-y: auto;
    scrollbar-width: thin;
}

.leaderboard li {
    counter-increment: rank;
    display: flex;
    align-items: baseline;
    gap: 10px;
    padding: 7px 0;
    font-size: 14px;
    border-bottom: 1px solid var(--line);
}

.leaderboard li:last-child {
    border-bottom: none;
}

.leaderboard li::before {
    content: counter(rank);
    flex: 0 0 18px;
    font-size: 11px;
    font-variant-numeric: tabular-nums;
    color: var(--muted);
}

.leaderboard li.is-you {
    color: var(--accent);
    font-weight: 700;
}

.entry-name {
    flex: 1;
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
}

.entry-verified {
    margin-left: 5px;
    font-size: 11px;
    color: var(--verified);
}

.entry-score {
    font-weight: 700;
    font-variant-numeric: tabular-nums;
}

.leaderboard-status {
    margin: 0;
    font-size: 13px;
    color: var(--muted);
    text-align: center;
}

/* Populated conditionally; an empty one would leave a stray gap in the card. */
.leaderboard-status:empty {
    display: none;
}

/* auth control, in the header */

.auth {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    color: var(--muted);
}

.auth-name {
    font-weight: 700;
    color: var(--ink);
}

.auth-signout {
    color: var(--muted);
    text-decoration: underline;
    text-underline-offset: 2px;
}

.auth-signout:hover {
    color: var(--accent);
}

/* footer */

.footer {
    margin: 0;
    font-size: 12px;
    font-weight: 400;
    color: var(--muted);
}

/* game over ---------------------------------------------------------------- */

.overlay {
    position: fixed;
    inset: 0;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background-color: rgba(225, 239, 199, 0.9);
    backdrop-filter: blur(3px);
}

/* .overlay sets display, so the hidden attribute needs to win explicitly */
.overlay[hidden] {
    display: none;
}

.overlay-card {
    width: 100%;
    max-width: 380px;
    padding: 28px 26px 22px;
    text-align: center;
    border: 1px solid var(--line-strong);
    border-radius: 20px;
    background-color: var(--panel-solid);
    box-shadow: 0 10px 40px rgba(56, 72, 42, 0.18);
}

.overlay-card h2 {
    margin: 0 0 18px;
    font-size: 15px;
    font-weight: 700;
    letter-spacing: 3px;
    color: var(--muted);
}

.final-score {
    margin: 0 0 22px;
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 2px;
    color: var(--muted);
}

.final-score span {
    display: block;
    margin-top: 4px;
    font-size: 44px;
    line-height: 1;
    letter-spacing: -1px;
    color: var(--accent);
    font-variant-numeric: tabular-nums;
}

.name-field {
    margin: 0 0 14px;
    text-align: left;
}

.name-field label {
    display: block;
    margin-bottom: 6px;
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 1.5px;
    color: var(--muted);
}

.name-field input {
    width: 100%;
    height: 46px;
    padding: 0 14px;
    border: 1px solid var(--line-strong);
    border-radius: 12px;
    background-color: white;
    color: var(--ink);
    font-family: inherit;
    /* 16px keeps iOS Safari from zooming the page on focus. */
    font-size: 16px;
    text-align: center;
}

.name-field input:focus {
    outline: none;
    border-color: var(--accent);
}

.name-field input::placeholder {
    color: #c3ccb8;
}

.overlay-status {
    min-height: 17px;
    margin: 0 0 16px;
    font-size: 12px;
    line-height: 1.4;
    color: var(--muted);
}

.overlay-actions {
    display: flex;
    gap: 10px;
    justify-content: center;
    flex-wrap: wrap;
}

/* Slightly tighter than the header buttons so both fit on one row inside
   the card. */
.overlay-actions .button {
    padding: 0 13px;
}

.overlay-signin-note {
    margin: 20px 0 8px !important;
    font-size: 12px;
    color: var(--muted);
}

.overlay-signin {
    display: flex;
    justify-content: center;
}

/* Google sign-in button ---------------------------------------------------
   Follows Google's Identity branding guidelines: their G mark unaltered,
   the exact phrase, white surface and their neutral border. Intentionally
   not restyled to match the rest of the page — recognisability is the point,
   and altering it is not permitted. */

.google-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    height: 40px;
    padding: 0 14px;
    border: 1px solid #747775;
    border-radius: 20px;
    background-color: #ffffff;
    color: #1f1f1f;
    font-family: 'Roboto', 'Noto Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 0.2px;
    cursor: pointer;
    transition: background-color 0.15s, box-shadow 0.15s;
}

.google-btn:hover {
    background-color: #f7f8f8;
    box-shadow: 0 1px 2px rgba(60, 64, 67, 0.3);
}

.google-btn:active {
    background-color: #eceded;
}

.google-btn-logo {
    width: 18px;
    height: 18px;
    flex: 0 0 auto;
}

/* Header variant: shorter, to sit beside the score and New Game. */
.google-btn-compact {
    height: 36px;
    padding: 0 12px;
    font-size: 13px;
    gap: 8px;
}

/* narrow screens ----------------------------------------------------------- */

@media (max-width: 700px) {
    body {
        gap: 18px;
        padding: 18px 14px 28px;
    }

    .game-header {
        justify-content: space-between;
        gap: 10px;
    }

    h1 {
        flex: 1 1 100%;
        justify-content: center;
    }

    .score-counter,
    .button {
        flex: 1 1 0;
        height: 48px;
    }

    /* Third item in the header row: give it its own line rather than
       squeezing the score and button. */
    .auth {
        flex: 1 1 100%;
        justify-content: center;
    }

    .auth .button {
        flex: 0 0 auto;
    }

    /* Keep the score and button inside the board's footprint rather than
       running to the edges of the screen. */
    .game-header,
    .leaderboard {
        width: var(--board);
        max-width: var(--board);
    }

    /* Stacked under the board, the card grows with its contents rather than
       being pinned to the board's height. */
    .leaderboard {
        height: auto;
    }

    .leaderboard ol {
        max-height: 46vh;
    }
}

/* privacy / terms ---------------------------------------------------------- */

.page {
    width: 100%;
    max-width: 620px;
    padding: 8px 4px 40px;
    line-height: 1.6;
}

.page h1 {
    justify-content: flex-start;
    margin-bottom: 24px;
    font-size: clamp(24px, 6vw, 32px);
}

.page h1 a {
    color: inherit;
    text-decoration: none;
}

.page h2 {
    margin: 0 0 4px;
    font-size: 20px;
}

.page h3 {
    margin: 28px 0 6px;
    font-size: 15px;
}

.page p {
    margin: 0 0 12px;
    font-size: 14px;
}

.page code {
    padding: 1px 5px;
    border-radius: 4px;
    background-color: rgba(255, 255, 255, 0.7);
    font-size: 13px;
}

.page-date {
    margin-bottom: 24px !important;
    font-size: 12px !important;
    color: var(--muted);
}

.page-back {
    margin-top: 32px !important;
    padding-top: 16px;
    border-top: 1px solid var(--line);
}

.footer-links {
    margin: -14px 0 0;
    font-size: 12px;
    color: var(--muted);
}

.footer-links a {
    color: var(--muted);
}