@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;600;700&display=swap');
@import url('https://fonts.googleapis.com/css2?family=VT323&display=swap');

:root {
    --background-color: #101014;
    --surface-color: rgba(255, 255, 255, 0.06);
    --surface-border: rgba(255, 255, 255, 0.12);
    --text-color: #f2f2f2;
    --text-muted: rgba(255, 255, 255, 0.6);
    --accent: #33d17a;
    --accent-hover: #2bb968;
    --danger: #e64553;
    --canvas-bg: #16161c;
    --canvas-border: rgba(255, 255, 255, 0.14);
    --score-bg: rgba(0, 0, 0, 0.55);
    --shadow: 0 20px 50px rgba(0, 0, 0, 0.45);
}

* {
    box-sizing: border-box;
}

html, body {
    height: 100%;
}

body {
    background: radial-gradient(circle at top, #1a1a22 0%, var(--background-color) 65%);
    color: var(--text-color);
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 0;
    padding: 0;
    font-family: 'Poppins', sans-serif;
    position: relative;
    overflow: hidden;
    -webkit-tap-highlight-color: transparent;
}

canvas {
    background-color: var(--canvas-bg);
    border: 3px solid var(--canvas-border);
    position: absolute;
    display: none;
    border-radius: 16px;
    box-shadow: var(--shadow);
}

#gameOverScreen, #startGameScreen, #pauseScreen {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    background: rgba(8, 8, 12, 0.82);
    backdrop-filter: blur(6px);
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    color: var(--text-color);
    text-align: center;
    overflow-y: auto;
    padding: 20px 0;
}

#gameOverScreen, #pauseScreen {
    display: none;
}

button {
    background-color: var(--accent);
    border: none;
    color: #0a0a0a;
    font-weight: 600;
    padding: 13px 28px;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    font-size: 15px;
    cursor: pointer;
    border-radius: 10px;
    margin: 6px 0;
    transition: transform 0.15s ease, background-color 0.2s ease, box-shadow 0.2s ease;
    box-shadow: 0 4px 14px rgba(51, 209, 122, 0.25);
}

button:hover {
    background-color: var(--accent-hover);
    transform: translateY(-2px);
}

button:active {
    transform: translateY(0);
}

button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

button:disabled:hover {
    background-color: var(--accent);
    transform: none;
}

/* Logo */
.logo-container {
    width: 170px;
    height: 170px;
    margin-bottom: 24px;
    border-radius: 24px;
    border: 3px solid var(--surface-border);
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
    animation: logoAnimation 3s ease-in-out infinite;
    box-shadow: var(--shadow);
}

.logo-container img {
    width: auto;
    height: 100%;
    max-width: 100%;
    max-height: 100%;
}

#highScoreInput {
    margin-bottom: 10px;
    padding: 10px 14px;
    border-radius: 8px;
    border: 1px solid var(--surface-border);
    background: rgba(255, 255, 255, 0.08);
    color: var(--text-color);
    font-family: inherit;
    font-size: 14px;
    text-align: center;
    outline: none;
}

#highScoreInput:focus {
    border-color: var(--accent);
}

#googleSignInContainer {
    display: flex;
    justify-content: center;
    margin-bottom: 10px;
}

#signedInAs {
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 10px;
}

#highScoreInput.input-error {
    border-color: var(--danger);
    animation: shakeError 0.3s ease-in-out;
}

#highScoreInput.input-error::placeholder {
    color: #ff8a94;
}

@keyframes shakeError {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-4px); }
    75% { transform: translateX(4px); }
}

.scoreboard {
    margin-bottom: 16px;
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
}

.scoreboard-tabs {
    display: flex;
    gap: 6px;
    margin-bottom: 10px;
    background: rgba(255, 255, 255, 0.04);
    border-radius: 10px;
    padding: 4px;
}

.tab-btn {
    flex: 1;
    background: transparent;
    color: var(--text-muted);
    border: none;
    box-shadow: none;
    padding: 8px 10px;
    font-size: 12px;
    font-weight: 600;
    margin: 0;
    border-radius: 8px;
    cursor: pointer;
    transition: background-color 0.2s ease, color 0.2s ease, transform 0.15s ease;
}

.tab-btn:hover {
    background: rgba(255, 255, 255, 0.08);
    color: var(--text-color);
    transform: none;
}

.tab-btn.active {
    background: var(--accent);
    color: #0a0a0a;
    box-shadow: 0 2px 8px rgba(51, 209, 122, 0.3);
}

.top-player-banner {
    display: none;
    align-items: center;
    gap: 8px;
    padding: 8px 10px;
    margin-bottom: 10px;
    background: linear-gradient(135deg, rgba(255, 213, 79, 0.12), rgba(51, 209, 122, 0.12));
    border: 1px solid rgba(255, 213, 79, 0.3);
    border-radius: 8px;
    font-weight: 700;
    font-size: 14px;
    width: 100%;
    box-sizing: border-box;
    overflow: hidden;
}

.banner-trophy {
    flex: 0 0 auto;
    font-size: 18px;
    line-height: 1;
}

.banner-info {
    min-width: 0;
    flex: 1 1 auto;
    overflow: hidden;
}

.banner-name {
    display: inline-flex;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 100%;
}

/* Continuous, subtle character-by-character color pulse for the top player's name */
.banner-letter {
    display: inline-block;
    animation: letterGlow 2.4s ease-in-out infinite;
}

@keyframes letterGlow {
    0%, 100% {
        opacity: 0.55;
        transform: translateY(0);
    }
    50% {
        opacity: 1;
        transform: translateY(-1.5px);
    }
}

/* Rank Badges (Top 3) */
.rank-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    font-size: 10px;
    font-weight: 700;
    margin-right: 6px;
    flex: 0 0 auto;
    color: #1a1a1a;
}

.rank-gold {
    background: linear-gradient(135deg, #ffe27a, #ffb300);
    box-shadow: 0 0 6px rgba(255, 179, 0, 0.6);
}

.rank-silver {
    background: linear-gradient(135deg, #e8e8e8, #b0b0b8);
    box-shadow: 0 0 6px rgba(180, 180, 190, 0.5);
}

.rank-bronze {
    background: linear-gradient(135deg, #d99a5b, #a86a35);
    box-shadow: 0 0 6px rgba(168, 106, 53, 0.5);
}

.scoreboard h2 {
    font-size: 1.2rem;
    margin-bottom: 8px;
    color: var(--text-muted);
    letter-spacing: 0.03em;
    text-transform: uppercase;
    font-weight: 600;
}

.scoreboard ol {
    list-style-type: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.scoreboard li {
    font-size: 14px;
    padding: 6px 10px;
    background: var(--surface-color);
    border: 1px solid var(--surface-border);
    border-radius: 8px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 8px;
    width: 100%;
    box-sizing: border-box;
    overflow: hidden;
}

.score-info {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    min-width: 0;
    flex: 1 1 auto;
    overflow: hidden;
}

.score-name {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    max-width: 100%;
    text-align: left;
    font-weight: 600;
}

.score-date {
    font-size: 11px;
    color: var(--text-muted);
    white-space: nowrap;
}

.score-value {
    flex: 0 0 auto;
    font-weight: 700;
    color: var(--accent);
    padding-left: 6px;
}

.scoreboard li.loading, .scoreboard li.empty {
    justify-content: center;
    color: var(--text-muted);
}

@keyframes logoAnimation {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.04); }
}

@keyframes menuFadeIn {
    0% { transform: translateY(16px); opacity: 0; }
    100% { transform: translateY(0); opacity: 1; }
}

@keyframes gameStartAnimation {
    0% { opacity: 0; transform: scale(0.96); }
    100% { opacity: 1; transform: scale(1); }
}

#startGameScreen {
    animation: gameStartAnimation 0.4s ease-out;
}

.menu-container {
    background-color: var(--surface-color);
    border: 1px solid var(--surface-border);
    padding: 1.75rem;
    border-radius: 18px;
    max-width: calc(100vw - 32px);
    width: 380px;
    box-shadow: var(--shadow);
    animation: menuFadeIn 0.5s ease-out backwards;
    box-sizing: border-box;
}

#startGameScreen button,
#startGameScreen .scoreboard,
#startGameScreen .button-group,
#startGameScreen .links {
    animation: menuFadeIn 0.5s ease-out backwards;
}

#startGameScreen button:nth-of-type(1) { animation-delay: 0.05s; }
.scoreboard { animation-delay: 0.1s; }
.button-group { animation-delay: 0.15s; }
.links { animation-delay: 0.2s; }

.menu-button {
    font-size: 1.05rem;
    padding: 0.9rem 1.5rem;
    margin: 0.5rem 0 1.2rem;
    width: 100%;
}

.button-group {
    display: flex;
    gap: 10px;
    margin: 0.5rem 0;
}

.button-group button {
    flex: 1;
    margin: 0;
}

.links {
    margin-top: 1rem;
}

.links a {
    display: block;
    color: var(--accent);
    text-decoration: none;
    margin: 0.4rem 0;
    font-size: 14px;
    transition: color 0.2s ease;
}

.links a:hover {
    color: var(--accent-hover);
    text-decoration: underline;
}

.creator-info {
    font-size: 0.75em;
    color: var(--text-muted);
    margin-top: 16px;
}

/* Pause Button */
#pauseButton {
    position: absolute;
    top: 16px;
    right: 16px;
    display: none;
    background: var(--surface-color);
    border: 1px solid var(--surface-border);
    color: var(--text-color);
    padding: 8px 16px;
    font-size: 14px;
    font-weight: 600;
    box-shadow: none;
    border-radius: 8px;
    z-index: 10;
}

#pauseButton:hover {
    background: rgba(255, 255, 255, 0.12);
    transform: none;
}

#pauseScreen h2 {
    font-size: 2.6em;
    margin-bottom: 20px;
}

/* Mute Buttons */
.mute-button {
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--text-color);
    box-shadow: none;
    border: 1px solid var(--surface-border);
}

.mute-button:hover {
    background-color: rgba(255, 255, 255, 0.18);
}

.mute-button.muted {
    background-color: rgba(230, 69, 83, 0.18);
    border-color: rgba(230, 69, 83, 0.4);
    color: #ff8a94;
}

/* Score Counter */
#scoreCounter {
    position: absolute;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 30px;
    font-weight: 700;
    color: var(--text-color);
    background-color: var(--score-bg);
    padding: 6px 18px;
    border-radius: 10px;
    display: none;
    z-index: 10;
    letter-spacing: 0.02em;
}

.animateScore {
    animation: scoreAnimation 0.3s ease-in-out;
}

@keyframes scoreAnimation {
    0% { transform: translateX(-50%) scale(1); }
    50% { transform: translateX(-50%) scale(1.25); color: var(--accent); }
    100% { transform: translateX(-50%) scale(1); }
}

#gameOverScreen h2 {
    font-size: 2.6rem;
    margin-bottom: 4px;
}

#gameOverScreen p {
    font-size: 1.2rem;
    color: var(--text-muted);
    margin: 4px 0 20px;
}

#gameOverScreen p span {
    color: var(--accent);
    font-weight: 700;
}

/* iOS Prompt */
#iosPrompt {
    display: none;
    position: fixed;
    top: 20%;
    left: 50%;
    transform: translateX(-50%);
    background-color: rgba(10, 10, 12, 0.95);
    color: white;
    padding: 20px;
    border-radius: 14px;
    z-index: 1000;
    max-width: 300px;
    text-align: center;
    box-shadow: var(--shadow);
    border: 1px solid var(--surface-border);
}

#iosPrompt button {
    margin-top: 10px;
    background-color: var(--danger);
    color: white;
}

@media (max-width: 768px) {
    .menu-container {
        width: 90%;
        padding: 1.5rem;
        max-height: 90vh;
        overflow-y: auto;
    }

    .menu-button {
        font-size: 1rem;
        padding: 0.75rem 1.2rem;
    }

    #scoreCounter {
        font-size: 24px;
        top: 14px;
    }

    #pauseButton {
        top: 14px;
        right: 14px;
        font-size: 13px;
        padding: 7px 14px;
    }

    .logo-container {
        width: 130px;
        height: 130px;
        margin-bottom: 18px;
    }

    canvas {
        max-width: 95vw;
        max-height: 95vw;
    }
}

/* Nokia Mode toggle button */
.nokia-toggle-button {
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--text-color);
    box-shadow: none;
    border: 1px solid var(--surface-border);
    width: 100%;
    display: block;
}

.nokia-toggle-button.active {
    background-color: rgba(51, 209, 122, 0.25);
    border-color: rgba(51, 209, 122, 0.5);
    color: #7dffb0;
}

/* ============================================================ */
/* NOKIA MODE - classic monochrome LCD Snake look                */
/* ============================================================ */
body.nokia-mode {
    background: #9ead86 !important;
}

body.nokia-mode * {
    font-family: 'VT323', monospace !important;
    border-radius: 0 !important;
    box-shadow: none !important;
    text-shadow: none !important;
    animation: none !important;
    backdrop-filter: none !important;
}

body.nokia-mode canvas {
    background-color: #a8bf8f !important;
    border: 8px solid #1a1d14 !important;
}

body.nokia-mode #startGameScreen,
body.nokia-mode #gameOverScreen,
body.nokia-mode #pauseScreen {
    background: #8ea377 !important;
    color: #2b2f1f !important;
}

body.nokia-mode .menu-container {
    background: #9ead86 !important;
    border: 4px solid #2b2f1f !important;
}

body.nokia-mode h1,
body.nokia-mode h2,
body.nokia-mode p,
body.nokia-mode .scoreboard h2,
body.nokia-mode .score-name,
body.nokia-mode .score-date,
body.nokia-mode .score-value,
body.nokia-mode .creator-info,
body.nokia-mode #signedInAs {
    color: #2b2f1f !important;
}

body.nokia-mode .logo-container {
    display: none !important;
}

.nokia-ascii-logo {
    display: none;
}

body.nokia-mode .nokia-ascii-logo {
    display: block !important;
    font-family: 'VT323', monospace !important;
    font-size: 16px !important;
    line-height: 1.1 !important;
    color: #1a1d14 !important;
    margin: 0 auto 16px !important;
    white-space: pre !important;
    text-align: center;
    letter-spacing: 0.5px;
    /* Simulate bold weight (VT323 has no bold cut) by layering a duplicate text-shadow. */
    text-shadow:
        0.6px 0 0 #1a1d14,
        -0.6px 0 0 #1a1d14,
        0 0.6px 0 #1a1d14,
        0 -0.6px 0 #1a1d14 !important;
}

body.nokia-mode button {
    background: #2b2f1f !important;
    color: #9ead86 !important;
    border: 2px solid #2b2f1f !important;
    font-size: 18px !important;
}

body.nokia-mode button:hover {
    background: #454b2e !important;
}

body.nokia-mode .scoreboard li,
body.nokia-mode .top-player-banner,
body.nokia-mode .scoreboard-tabs {
    background: #8ea377 !important;
    border: 2px solid #2b2f1f !important;
}

body.nokia-mode .tab-btn {
    color: #2b2f1f !important;
    background: transparent !important;
}

body.nokia-mode .tab-btn.active {
    background: #2b2f1f !important;
    color: #9ead86 !important;
}

body.nokia-mode .rank-badge,
body.nokia-mode .banner-trophy {
    display: none !important;
}

body.nokia-mode .banner-letter {
    color: #2b2f1f !important;
}

body.nokia-mode #scoreCounter {
    background: #2b2f1f !important;
    color: #9ead86 !important;
    font-family: 'VT323', monospace !important;
    border-radius: 0 !important;
}

body.nokia-mode .links a {
    color: #2b2f1f !important;
}

body.nokia-mode .creator-info {
    opacity: 0.8;
}