/* ============================================
   WORD MINE — Minecraft-Themed CSS
   ============================================ */

/* Minecraft-style pixel font via system fonts */
@import url('https://fonts.googleapis.com/css2?family=Press+Start+2P&display=swap');

:root {
    --mc-green: #4a8f3f;
    --mc-dark-green: #3a7232;
    --mc-brown: #8B6914;
    --mc-dark-brown: #6B4F12;
    --mc-stone: #7f7f7f;
    --mc-dark-stone: #5f5f5f;
    --mc-dirt: #96712B;
    --mc-sky: #78b9ff;
    --mc-night: #1a1a2e;
    --mc-gold: #FFD700;
    --mc-diamond: #4AEDD9;
    --mc-iron: #D8D8D8;
    --mc-obsidian: #1B0B2E;
    --mc-enchant: #a855f7;
    --mc-lava: #FF4500;
    --mc-water: #3B7FCC;
    --mc-red: #CC3333;
    --mc-white: #f0f0f0;
    --mc-black: #1a1a1a;
    --mc-ui-bg: rgba(0, 0, 0, 0.75);
    --mc-panel: #2d2d2d;
    --mc-panel-border: #4a4a4a;
    --mc-btn-green: #5daa3a;
    --mc-btn-green-dark: #3d7a1a;
    --mc-btn-gray: #6b6b6b;
    --mc-btn-gray-dark: #4a4a4a;
    --mc-text: #e0e0e0;
    --mc-text-shadow: #1a1a1a;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html, body {
    width: 100%;
    height: 100%;
    overflow: hidden;
    background: var(--mc-night);
    font-family: 'Press Start 2P', monospace;
    color: var(--mc-text);
    -webkit-user-select: none;
    user-select: none;
    touch-action: manipulation;
}

/* ============ PIXEL TEXT ============ */
.pixel-title {
    font-family: 'Press Start 2P', monospace;
    text-shadow: 3px 3px 0 var(--mc-text-shadow);
    letter-spacing: 2px;
}

.pixel-text {
    font-family: 'Press Start 2P', monospace;
    font-size: 12px;
    text-shadow: 1px 1px 0 var(--mc-text-shadow);
}

/* ============ SCREENS ============ */
.screen {
    position: fixed;
    inset: 0;
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 10;
}
.screen.active {
    display: flex;
}

/* ============ LOADING SCREEN ============ */
#loading-screen {
    background: var(--mc-night);
    flex-direction: column;
}
.loading-content {
    text-align: center;
}
.loading-logo {
    display: flex;
    gap: 8px;
    justify-content: center;
    margin-bottom: 24px;
}
.mc-block {
    width: 48px;
    height: 48px;
    image-rendering: pixelated;
    border: 3px solid rgba(0,0,0,0.3);
}
.grass-block { background: linear-gradient(to bottom, var(--mc-green) 30%, var(--mc-dirt) 30%); }
.diamond-block { background: var(--mc-diamond); }
.stone-block { background: var(--mc-stone); }
.loading-bar-container {
    width: 280px;
    height: 16px;
    background: var(--mc-panel);
    border: 3px solid var(--mc-panel-border);
    margin: 16px auto;
}
.loading-bar {
    height: 100%;
    width: 0%;
    background: var(--mc-btn-green);
    transition: width 0.3s;
}
.loading-text {
    font-size: 10px;
    color: #888;
}
#loading-screen .pixel-title {
    font-size: 32px;
    color: var(--mc-gold);
}

/* ============ PANELS ============ */
.panel {
    background: var(--mc-panel);
    border: 4px solid var(--mc-panel-border);
    padding: 24px;
    box-shadow: inset 0 0 0 2px rgba(255,255,255,0.05), 4px 4px 0 rgba(0,0,0,0.5);
}

/* ============ BUTTONS ============ */
.mc-btn {
    font-family: 'Press Start 2P', monospace;
    font-size: 12px;
    color: #ffffff;
    background: var(--mc-btn-gray);
    border: 3px solid var(--mc-btn-gray-dark);
    border-top-color: #8a8a8a;
    border-left-color: #8a8a8a;
    padding: 10px 20px;
    cursor: pointer;
    text-shadow: 1px 1px 0 rgba(0,0,0,0.6);
    transition: filter 0.1s;
    min-height: 44px;
    min-width: 44px;
}
.mc-btn:hover {
    filter: brightness(1.15);
}
.mc-btn:active {
    border-top-color: var(--mc-btn-gray-dark);
    border-left-color: var(--mc-btn-gray-dark);
    border-bottom-color: #8a8a8a;
    border-right-color: #8a8a8a;
    transform: translateY(1px);
}
.mc-btn-primary {
    background: var(--mc-btn-green);
    color: #ffffff;
    text-shadow: 2px 2px 0 #2a5c12;
    border-color: var(--mc-btn-green-dark);
    border-top-color: #7dca5a;
    border-left-color: #7dca5a;
}
.mc-btn-primary:active {
    border-top-color: var(--mc-btn-green-dark);
    border-left-color: var(--mc-btn-green-dark);
    border-bottom-color: #7dca5a;
    border-right-color: #7dca5a;
}
.mc-btn-back {
    position: absolute;
    bottom: 16px;
    left: 16px;
    font-size: 10px;
    padding: 8px 14px;
}
.mc-btn-small {
    font-size: 9px;
    padding: 6px 12px;
    min-height: 32px;
}
.mc-btn.selected, .grade-btn.selected {
    background: var(--mc-btn-green);
    border-color: var(--mc-btn-green-dark);
    border-top-color: #7dca5a;
    border-left-color: #7dca5a;
}
.toggle-btn[data-on="true"] {
    background: var(--mc-btn-green);
    border-color: var(--mc-btn-green-dark);
}
.toggle-btn[data-on="false"] {
    background: var(--mc-red);
    border-color: #992222;
}

/* ============ INPUTS ============ */
.mc-input {
    font-family: 'Press Start 2P', monospace;
    font-size: 14px;
    background: var(--mc-black);
    color: var(--mc-text);
    border: 3px solid var(--mc-panel-border);
    padding: 10px 14px;
    width: 100%;
    max-width: 280px;
    outline: none;
}
.mc-input:focus {
    border-color: var(--mc-btn-green);
}

/* ============ WELCOME SCREEN ============ */
#welcome-screen {
    background: var(--mc-night);
}
.welcome-content {
    max-width: 400px;
    width: 90%;
    text-align: center;
}
.welcome-content .pixel-title {
    font-size: 20px;
    color: var(--mc-gold);
    margin-bottom: 20px;
}
.welcome-form {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 14px;
}
.welcome-form label {
    font-size: 10px;
    color: #aaa;
}
.grade-buttons {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
    justify-content: center;
}
.grade-btn {
    font-size: 10px;
    padding: 8px 12px;
}
#start-adventure-btn {
    margin-top: 10px;
    font-size: 14px;
    padding: 12px 28px;
}

/* ============ TITLE SCREEN ============ */
#title-screen {
    background: var(--mc-night);
}
.title-content {
    width: 100%;
    height: 100%;
    position: relative;
}
.title-scene {
    width: 100%;
    height: 100%;
    position: absolute;
    inset: 0;
}
.title-scene canvas {
    width: 100%;
    height: 100%;
    image-rendering: pixelated;
    display: block;
}
.title-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.35);
    gap: 8px;
}
.title-logo-img {
    max-width: 280px;
    width: 80%;
    height: auto;
    image-rendering: pixelated;
    animation: title-bob 3s ease-in-out infinite;
    filter: drop-shadow(2px 3px 4px rgba(0,0,0,0.5));
}
.game-title {
    font-size: 42px;
    color: var(--mc-gold);
    text-shadow: 4px 4px 0 #5a3a00, -1px -1px 0 #FFE87C;
    animation: title-bob 3s ease-in-out infinite;
}
@keyframes title-bob {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-6px); }
}
.subtitle {
    font-size: 11px;
    color: #aaa;
    margin-bottom: 12px;
}
.title-buttons {
    display: flex;
    flex-direction: column;
    gap: 8px;
    align-items: center;
}
.title-buttons .mc-btn {
    min-width: 200px;
}
.player-info {
    position: absolute;
    top: 12px;
    right: 16px;
    text-align: right;
    display: flex;
    flex-direction: column;
    gap: 4px;
    align-items: flex-end;
}
#title-player-name { font-size: 11px; color: var(--mc-gold); }
#title-player-level { font-size: 9px; color: #aaa; }
.xp-bar-mini {
    width: 120px;
    height: 8px;
    background: var(--mc-panel);
    border: 2px solid var(--mc-panel-border);
}
.xp-fill {
    height: 100%;
    background: var(--mc-btn-green);
    transition: width 0.5s;
}

/* Daily streak badge */
.daily-streak-badge {
    position: absolute;
    top: 12px;
    left: 16px;
    display: flex;
    align-items: center;
    gap: 4px;
    background: rgba(0, 0, 0, 0.6);
    border: 2px solid #FF6B2B;
    border-radius: 4px;
    padding: 4px 10px;
    animation: streakPulse 2s ease-in-out infinite;
}
.streak-fire { font-size: 14px; }
#daily-streak-count { font-size: 14px; color: #FF6B2B; }
.streak-label { font-size: 7px; color: #ccc; }
@keyframes streakPulse {
    0%, 100% { border-color: #FF6B2B; }
    50% { border-color: #FFD700; }
}

/* ============ MODE SELECT ============ */
#mode-screen {
    background: var(--mc-night);
}
.mode-content {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 16px;
    overflow-y: auto;
}
.mode-content .pixel-title {
    font-size: 20px;
    color: var(--mc-gold);
    margin-bottom: 16px;
}
.mode-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    max-width: 700px;
    width: 100%;
}
.mode-card {
    background: var(--mc-panel);
    border: 3px solid var(--mc-panel-border);
    padding: 16px;
    text-align: center;
    cursor: pointer;
    transition: transform 0.15s, border-color 0.15s;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    min-height: 120px;
}
.mode-card:hover {
    transform: translateY(-3px);
    border-color: var(--mc-gold);
}
.mode-icon {
    width: 48px;
    height: 48px;
}
.mode-icon .mc-block {
    width: 100%;
    height: 100%;
}
.pickaxe-icon { background: linear-gradient(135deg, var(--mc-iron) 40%, var(--mc-brown) 40%); }
.bridge-icon { background: linear-gradient(to bottom, var(--mc-sky) 60%, var(--mc-brown) 60%); border-bottom: 4px solid var(--mc-lava); }
.enchant-icon { background: var(--mc-obsidian); box-shadow: inset 0 0 12px var(--mc-enchant); }
.craft-icon { background: var(--mc-brown); border: 3px solid var(--mc-dark-brown); }
.explore-icon { background: linear-gradient(to bottom, var(--mc-sky) 50%, var(--mc-green) 50%); }
.mob-icon { background: var(--mc-btn-green); border-radius: 4px; box-shadow: inset 8px 8px 0 var(--mc-dark-green), inset -8px -8px 0 var(--mc-dark-green); }

.mode-card h3 { font-size: 11px; color: var(--mc-gold); }
.mode-desc { font-family: 'Press Start 2P', monospace; font-size: 8px; color: #999; text-shadow: none; }

/* Daily Challenge button */
.mode-card-daily {
    background: linear-gradient(135deg, #2d2d2d 0%, #3a2a10 100%);
    border-color: var(--mc-gold);
    box-shadow: inset 0 0 12px rgba(255, 215, 0, 0.15), 0 0 8px rgba(255, 215, 0, 0.2);
}
.mode-card-daily:hover {
    border-color: #ffe066;
    box-shadow: inset 0 0 16px rgba(255, 215, 0, 0.25), 0 0 12px rgba(255, 215, 0, 0.3);
}
.mode-card-daily h3 { color: #ffe066; }
.daily-icon {
    background: linear-gradient(135deg, var(--mc-gold) 50%, #ff8c00 50%);
    box-shadow: inset 0 0 8px rgba(255, 255, 255, 0.3);
}

/* ============ TOPIC SELECT ============ */
#topic-screen {
    background: var(--mc-night);
}
.topic-content {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 16px;
    overflow-y: auto;
}
.topic-content .pixel-title {
    font-size: 18px;
    color: var(--mc-gold);
    margin-bottom: 12px;
}
.topic-tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 12px;
}
.topic-tab {
    font-size: 10px;
    padding: 8px 16px;
}
.topic-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 8px;
    max-width: 700px;
    width: 100%;
    max-height: 60vh;
    overflow-y: auto;
}
.topic-card {
    background: var(--mc-panel);
    border: 3px solid var(--mc-panel-border);
    padding: 10px;
    text-align: center;
    flex-direction: column;
    gap: 4px;
    cursor: pointer;
    font-family: 'Press Start 2P', monospace;
    font-size: 9px;
    color: var(--mc-text);
    transition: border-color 0.15s;
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.topic-card:hover {
    border-color: var(--mc-gold);
}
.topic-name { font-size: 10px; color: var(--mc-gold); }
.topic-level { font-size: 8px; color: #888; }
.topic-pct { font-size: 8px; color: var(--mc-btn-green); }

/* ============ GAME SCREEN ============ */
#game-screen {
    background: var(--mc-night);
}
#game-canvas {
    width: 100%;
    height: 100%;
    image-rendering: pixelated;
    display: block;
}

/* HUD */
.hud {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    padding: 8px 12px;
    pointer-events: none;
    z-index: 20;
}
.hud > * { pointer-events: auto; }
.hud-left, .hud-right {
    display: flex;
    flex-direction: column;
    gap: 4px;
}
.hud-center {
    text-align: center;
}
.hud-score {
    font-size: 18px;
    color: var(--mc-gold);
}
.hud-timer {
    font-size: 11px;
    color: var(--mc-text);
}
.hud-hearts {
    display: flex;
    gap: 2px;
}
.heart {
    width: 16px;
    height: 16px;
    background: var(--mc-red);
    clip-path: polygon(50% 100%, 0% 35%, 15% 0%, 50% 20%, 85% 0%, 100% 35%);
}
.heart.empty {
    background: #333;
}
.hud-streak {
    display: flex;
    align-items: center;
    gap: 4px;
}
#streak-count {
    font-size: 16px;
    color: var(--mc-gold);
}
.streak-label { font-size: 8px; color: #888; }
.hud-xp { font-size: 10px; color: var(--mc-btn-green); }
.hud-mode-label {
    font-size: 10px;
    color: var(--mc-gold);
    margin-top: 2px;
}
.hud-progress {
    font-size: 9px;
    color: #aaa;
    margin-bottom: 2px;
}
.hud-pause {
    font-size: 14px;
    padding: 6px 10px;
}
/* Combo overlay */
.combo-overlay {
    position: absolute;
    top: 50px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 18px;
    color: var(--mc-gold);
    text-shadow: 2px 2px 0 rgba(0,0,0,0.5);
    z-index: 25;
    pointer-events: none;
    display: none;
    animation: comboPulse 0.5s ease-in-out infinite alternate;
}
.combo-overlay.active { display: block; }
@keyframes comboPulse {
    from { transform: translateX(-50%) scale(1); }
    to { transform: translateX(-50%) scale(1.1); }
}
/* Inventory bar overlay */
.inventory-bar {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 32px;
    background: rgba(0,0,0,0.6);
    display: none;
    align-items: center;
    padding: 0 12px;
    gap: 16px;
    z-index: 20;
    pointer-events: none;
}
.inventory-bar.active {
    display: flex;
}
.inv-item {
    display: flex;
    align-items: center;
    gap: 4px;
}
.inv-icon {
    width: 16px;
    height: 16px;
    border: 1px solid rgba(255,255,255,0.2);
    border-radius: 2px;
}
.inv-count {
    font-family: 'Press Start 2P', monospace;
    font-size: 9px;
    color: #fff;
}
.inv-gems {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 4px;
    font-family: 'Press Start 2P', monospace;
    font-size: 9px;
    color: #2ecc71;
}

/* Mob name overlay */
.mob-name-overlay {
    position: absolute;
    font-size: 11px;
    color: #fff;
    text-shadow: 1px 1px 0 #000, -1px -1px 0 #000, 1px -1px 0 #000, -1px 1px 0 #000;
    z-index: 22;
    pointer-events: none;
    display: none;
    white-space: nowrap;
    transform: translateX(-50%);
}
.mob-name-overlay.active { display: block; }
.mob-name-overlay.boss { color: #e94560; font-size: 13px; }

/* Question Overlay — anchored to bottom so gameplay stays visible above */
.question-overlay {
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    display: none;
    justify-content: center;
    z-index: 30;
    padding-bottom: 8px;
    pointer-events: none;
}
.question-overlay.active {
    display: flex;
}
/* Hide HUD pause button when question overlay is active (use question-pause-btn instead) */
#game-screen:has(.question-overlay.active) .hud-pause { pointer-events: none; opacity: 0.3; }
.question-panel {
    position: relative;
    max-width: 500px;
    width: 95%;
    text-align: center;
    background: rgba(30, 30, 30, 0.92);
    backdrop-filter: blur(2px);
    pointer-events: auto;
    border-top: 3px solid rgba(255,255,255,0.15);
    border-radius: 8px 8px 0 0;
}
.question-pause-btn {
    position: absolute;
    top: 6px;
    right: 6px;
    background: rgba(255,255,255,0.15);
    border: 2px solid rgba(255,255,255,0.3);
    min-width: 48px;
    min-height: 48px;
    color: #fff;
    font-family: 'Press Start 2P', monospace;
    font-size: 10px;
    padding: 6px 10px;
    cursor: pointer;
    border-radius: 4px;
    z-index: 5;
}
.question-pause-btn:hover { background: rgba(255,255,255,0.25); }
.question-word-row {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
}
.hear-btn {
    background: var(--mc-btn-green);
    border: 3px solid #3a7d33;
    border-radius: 50%;
    width: 48px;
    height: 48px;
    font-size: 22px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.15s;
    flex-shrink: 0;
}
.hear-btn:hover { transform: scale(1.1); }
.hear-btn:active { transform: scale(0.95); }
.question-word {
    font-family: 'Press Start 2P', monospace;
    font-size: 36px;
    color: var(--mc-gold);
    text-shadow: 3px 3px 0 var(--mc-text-shadow);
    margin-bottom: 12px;
    min-height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.question-prompt {
    font-size: 11px;
    color: #aaa;
    margin-bottom: 16px;
}
.answer-buttons {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
}
.answer-btn {
    font-family: 'Press Start 2P', monospace;
    font-size: 16px;
    background: var(--mc-panel);
    color: var(--mc-text);
    border: 3px solid var(--mc-panel-border);
    padding: 14px;
    padding-left: 32px;
    cursor: pointer;
    transition: border-color 0.15s, background 0.15s;
    min-height: 52px;
    position: relative;
}
/* Number key hints on answer buttons (1-4) via CSS counters */
.answer-buttons { counter-reset: btn-counter; }
.answer-btn::before {
    counter-increment: btn-counter;
    content: counter(btn-counter);
    position: absolute;
    left: 6px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 9px;
    color: rgba(255,255,255,0.3);
    background: rgba(255,255,255,0.08);
    border: 1px solid rgba(255,255,255,0.15);
    border-radius: 3px;
    width: 18px;
    height: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    pointer-events: none;
    font-family: 'Press Start 2P', monospace;
}
.answer-btn:hover {
    border-color: var(--mc-gold);
    background: #3a3a3a;
}
.answer-btn.correct {
    background: var(--mc-btn-green) !important;
    border-color: #7dca5a !important;
}
.answer-btn.wrong {
    background: var(--mc-red) !important;
    border-color: #992222 !important;
}
.question-feedback {
    font-family: 'Press Start 2P', monospace;
    font-size: 14px;
    margin-top: 12px;
    min-height: 20px;
}
.feedback-correct { color: var(--mc-btn-green); }
.feedback-wrong { color: var(--mc-red); }
.feedback-hint { color: #f39c12; }

/* Pause Overlay */
.pause-overlay {
    position: absolute;
    inset: 0;
    display: none;
    align-items: center;
    justify-content: center;
    background: rgba(0,0,0,0.8);
    z-index: 40;
}
.pause-overlay.active { display: flex; }
.pause-panel {
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 12px;
    align-items: center;
}
.pause-panel .pixel-title {
    font-size: 24px;
    color: var(--mc-gold);
}

/* ============ RESULTS SCREEN ============ */
#results-screen {
    background: var(--mc-night);
}
.results-content {
    max-width: 420px;
    width: 90%;
    text-align: center;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    z-index: 2;
}
.results-content .pixel-title {
    font-size: 20px;
    color: var(--mc-gold);
    margin-bottom: 12px;
}
.results-stars {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-bottom: 16px;
}
.star {
    width: 32px;
    height: 32px;
    font-size: 28px;
    line-height: 32px;
}
.star.earned {
    color: var(--mc-gold);
    animation: starPop 0.4s cubic-bezier(0.34, 1.56, 0.64, 1) both;
}
.star.earned:nth-child(1) { animation-delay: 0.2s; }
.star.earned:nth-child(2) { animation-delay: 0.5s; }
.star.earned:nth-child(3) { animation-delay: 0.8s; }
@keyframes starPop {
    0% { transform: scale(0) rotate(-30deg); opacity: 0; }
    60% { transform: scale(1.4) rotate(10deg); opacity: 1; }
    100% { transform: scale(1) rotate(0deg); opacity: 1; }
}
.star.empty { color: #333; }
.results-stats {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-bottom: 16px;
}
.stat-row {
    display: flex;
    justify-content: space-between;
    padding: 4px 0;
    border-bottom: 1px solid #3a3a3a;
}
.stat-row .pixel-text { font-size: 10px; }
.stat-value { color: var(--mc-gold); }
/* XP Progress Bar on Results */
.results-xp-bar {
    margin: 8px 0;
    text-align: center;
}
.xp-bar-label {
    font-size: 9px;
    color: #aaa;
    margin-bottom: 3px;
}
.xp-bar-track {
    background: #222;
    border: 2px solid #555;
    height: 10px;
    border-radius: 2px;
    overflow: hidden;
}
.xp-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, #5daa3a, #7dda5a);
    transition: width 1.5s cubic-bezier(0.22, 1, 0.36, 1);
    box-shadow: 0 0 6px rgba(93, 170, 58, 0.5);
}
.xp-bar-text {
    font-size: 7px;
    color: #888;
    margin-top: 2px;
}
/* Newly Mastered Words */
.results-mastered {
    margin: 6px 0;
    text-align: center;
}
.mastered-words {
    display: flex;
    flex-wrap: wrap;
    gap: 5px;
    justify-content: center;
}
.mastered-word {
    font-family: 'Press Start 2P', monospace;
    font-size: 9px;
    background: rgba(255, 215, 0, 0.15);
    border: 2px solid #FFD700;
    padding: 3px 7px;
    color: #FFD700;
    animation: starPop 0.4s cubic-bezier(0.34, 1.56, 0.64, 1) both;
}
.mastered-word.learning {
    border-color: #5daa3a;
    color: #5daa3a;
    background: rgba(93, 170, 58, 0.15);
}
/* WPM Trend */
.results-wpm-trend {
    margin: 6px 0;
    text-align: center;
}
.wpm-trend-bars {
    display: flex;
    gap: 3px;
    justify-content: center;
    align-items: flex-end;
    height: 30px;
}
.wpm-trend-bar {
    width: 16px;
    background: #555;
    border-radius: 2px 2px 0 0;
    position: relative;
    transition: height 0.5s ease;
}
.wpm-trend-bar.meets-goal {
    background: #2ecc71;
}
.wpm-trend-bar.latest {
    background: #FFD700;
    box-shadow: 0 0 6px rgba(255, 215, 0, 0.4);
}
.wpm-trend-bar .bar-value {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    font-family: 'Press Start 2P', monospace;
    font-size: 6px;
    color: #ccc;
    white-space: nowrap;
}
.wpm-trend-label {
    font-size: 8px;
    color: #888;
    margin-top: 3px;
}

.results-words-missed {
    margin-bottom: 16px;
}
.results-words-missed h3 {
    font-size: 10px;
    color: var(--mc-red);
    margin-bottom: 8px;
}
.missed-words {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    justify-content: center;
}
.missed-word {
    font-family: 'Press Start 2P', monospace;
    font-size: 10px;
    background: rgba(204, 51, 51, 0.2);
    border: 2px solid var(--mc-red);
    padding: 4px 8px;
    color: var(--mc-red);
}
.results-buttons {
    display: flex;
    gap: 8px;
    justify-content: center;
}
#celebration-canvas {
    position: fixed;
    inset: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1;
}

/* ============ SKINS SCREEN ============ */
#skins-screen {
    background: var(--mc-night);
}
.skins-content {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 16px;
}
.skins-content .pixel-title {
    font-size: 18px;
    color: var(--mc-gold);
    margin-bottom: 12px;
}
.skins-preview {
    margin-bottom: 12px;
}
.skins-preview canvas {
    image-rendering: pixelated;
    border: 3px solid var(--mc-panel-border);
    background: var(--mc-panel);
}
.skins-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 8px;
    max-width: 500px;
    width: 100%;
    overflow: hidden;
}
.skin-card {
    background: var(--mc-panel);
    border: 3px solid var(--mc-panel-border);
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 6px 4px;
    gap: 4px;
    min-height: 80px;
    transition: border-color 0.15s;
    overflow: hidden;
}
.skin-card .pixel-text {
    font-size: 7px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 100%;
    text-align: center;
}
.skin-card .lock-text {
    font-size: 6px;
    color: #888;
}
.skin-card:hover { border-color: var(--mc-gold); }
.skin-card.selected { border-color: var(--mc-btn-green); }
.skin-card.locked { opacity: 0.4; cursor: not-allowed; }

/* ============ ACHIEVEMENTS ============ */
#achievements-screen {
    background: var(--mc-night);
    overflow: hidden;
}
.achievements-content {
    width: 100%;
    height: 100%;
    max-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 16px;
    padding-bottom: 60px;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
}
.achievements-content .pixel-title {
    font-size: 18px;
    color: var(--mc-gold);
    margin-bottom: 12px;
}
.achievements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 8px;
    max-width: 700px;
    width: 100%;
}
.achievement-card {
    background: var(--mc-panel);
    border: 3px solid var(--mc-panel-border);
    padding: 10px;
    display: flex;
    align-items: center;
    gap: 10px;
}
.achievement-card.unlocked {
    border-color: var(--mc-gold);
}
.achievement-card.locked {
    opacity: 0.4;
}
.achievement-icon {
    font-size: 24px;
    min-width: 32px;
    text-align: center;
}
.achievement-info {
    display: flex;
    flex-direction: column;
    gap: 4px;
}
.achievement-info h4, .achievement-name {
    font-family: 'Press Start 2P', monospace;
    font-size: 9px;
    color: var(--mc-gold);
    display: block;
}
.achievement-info p, .achievement-desc {
    font-family: 'Press Start 2P', monospace;
    font-size: 7px;
    color: #aaa;
    display: block;
}

/* ============ SETTINGS ============ */
#settings-screen {
    background: var(--mc-night);
}
.settings-content {
    max-width: 400px;
    width: 90%;
}
.settings-content .pixel-title {
    font-size: 18px;
    color: var(--mc-gold);
    margin-bottom: 16px;
    text-align: center;
}
.setting-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 0;
    border-bottom: 1px solid #3a3a3a;
    flex-wrap: wrap;
    gap: 6px;
}
.setting-row .pixel-text { font-size: 10px; }
.settings-grade {
    width: 100%;
    margin-top: 4px;
}

/* ============ PARENT DASHBOARD ============ */
#parent-screen {
    background: var(--mc-night);
}
.parent-content {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 16px;
    overflow-y: auto;
}
.parent-content .pixel-title {
    font-size: 18px;
    color: var(--mc-gold);
    margin-bottom: 16px;
}
.parent-lock {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}
.parent-lock .pixel-text { font-size: 11px; }
#parent-math { color: var(--mc-gold); font-size: 14px; }
#parent-answer { max-width: 120px; text-align: center; }
.parent-dashboard {
    width: 100%;
    max-width: 700px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}
.parent-section {
    background: var(--mc-panel);
    border: 3px solid var(--mc-panel-border);
    padding: 12px;
}
.parent-section h3 {
    font-size: 11px;
    color: var(--mc-gold);
    margin-bottom: 10px;
    border-bottom: 1px solid #3a3a3a;
    padding-bottom: 6px;
}
.parent-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
}
.parent-stat {
    text-align: center;
}
.parent-stat .stat-label {
    font-family: 'Press Start 2P', monospace;
    font-size: 8px;
    color: #888;
    display: block;
    margin-bottom: 4px;
}
.parent-stat .stat-num {
    font-family: 'Press Start 2P', monospace;
    font-size: 16px;
    color: var(--mc-gold);
}
.fastbridge-meters {
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.fb-meter {
    display: flex;
    flex-direction: column;
    gap: 4px;
}
.fb-meter-label {
    font-family: 'Press Start 2P', monospace;
    font-size: 9px;
    color: var(--mc-text);
    display: flex;
    justify-content: space-between;
}
.fb-meter-bar {
    height: 16px;
    background: var(--mc-black);
    border: 2px solid var(--mc-panel-border);
    position: relative;
}
.fb-meter-fill {
    height: 100%;
    transition: width 0.5s;
}
.fb-meter-fill.on-track { background: var(--mc-btn-green); }
.fb-meter-fill.some-risk { background: var(--mc-gold); }
.fb-meter-fill.high-risk { background: var(--mc-red); }
.fb-meter-benchmark {
    position: absolute;
    top: 0;
    bottom: 0;
    width: 2px;
    background: white;
}
.word-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(60px, 1fr));
    gap: 4px;
}
.word-cell {
    font-family: 'Press Start 2P', monospace;
    font-size: 9px;
    padding: 6px;
    text-align: center;
    border: 2px solid var(--mc-panel-border);
}
.word-cell.mastered { background: rgba(93, 170, 58, 0.3); border-color: var(--mc-btn-green); color: var(--mc-btn-green); }
.word-cell.learning { background: rgba(255, 215, 0, 0.2); border-color: var(--mc-gold); color: var(--mc-gold); }
.word-cell.new { background: rgba(127, 127, 127, 0.2); color: #888; }
.topic-bars {
    display: flex;
    flex-direction: column;
    gap: 6px;
}
.topic-bar-row {
    display: flex;
    align-items: center;
    gap: 8px;
}
.topic-bar-label {
    font-family: 'Press Start 2P', monospace;
    font-size: 8px;
    color: var(--mc-text);
    min-width: 80px;
}
.topic-bar {
    flex: 1;
    height: 12px;
    background: var(--mc-black);
    border: 2px solid var(--mc-panel-border);
}
.topic-bar-fill {
    height: 100%;
    background: var(--mc-btn-green);
    transition: width 0.3s;
}
.topic-bar-pct {
    font-family: 'Press Start 2P', monospace;
    font-size: 8px;
    color: var(--mc-gold);
    min-width: 40px;
    text-align: right;
}
#reset-progress-btn {
    font-size: 9px;
    background: var(--mc-red);
    border-color: #992222;
    align-self: center;
}

/* ============ SHOP SCREEN ============ */
#shop-screen {
    background: var(--mc-night);
}
.shop-content {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 16px;
    overflow-y: auto;
}
.shop-content .pixel-title {
    font-size: 18px;
    color: var(--mc-gold);
    margin-bottom: 8px;
}
.shop-gems {
    font-size: 12px;
    color: #2ecc71;
    margin-bottom: 12px;
}
.shop-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 12px;
    justify-content: center;
}
.shop-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: 8px;
    max-width: 600px;
    width: 100%;
    max-height: 55vh;
    overflow-y: auto;
}
.shop-card {
    background: var(--mc-panel);
    border: 3px solid var(--mc-panel-border);
    padding: 10px;
    text-align: center;
    cursor: pointer;
    transition: border-color 0.15s, transform 0.15s;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    min-height: 90px;
    font-family: 'Press Start 2P', monospace;
}
.shop-card:hover {
    border-color: var(--mc-gold);
    transform: translateY(-2px);
}
.shop-card.owned {
    border-color: var(--mc-btn-green);
}
.shop-card.equipped {
    border-color: var(--mc-gold);
    background: rgba(93, 170, 58, 0.15);
}
.shop-card.locked {
    opacity: 0.5;
    cursor: not-allowed;
}
.shop-item-name {
    font-size: 9px;
    color: var(--mc-gold);
}
.shop-item-desc {
    font-size: 7px;
    color: #888;
    text-shadow: none;
}
.shop-item-cost {
    font-size: 8px;
    color: #2ecc71;
    margin-top: 4px;
}
.tool-preview {
    width: 24px;
    height: 24px;
    border: 2px solid rgba(0,0,0,0.3);
    clip-path: polygon(50% 0%, 75% 25%, 75% 50%, 50% 75%, 25% 50%, 25% 25%);
}
.skin-canvas {
    image-rendering: pixelated;
}

/* ============ GEM DISPLAY ============ */
.gem-display {
    font-size: 10px !important;
    color: #2ecc71 !important;
}

/* ============ ACHIEVEMENT TOAST ============ */
.achievement-toast {
    position: fixed;
    top: -80px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--mc-panel);
    border: 3px solid var(--mc-gold);
    padding: 10px 16px;
    display: flex;
    align-items: center;
    gap: 10px;
    z-index: 100;
    transition: top 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
    box-shadow: 0 4px 12px rgba(0,0,0,0.5);
    min-width: 200px;
}
.achievement-toast.active {
    top: 16px;
}
.toast-icon {
    font-size: 24px;
}
.toast-title {
    font-size: 9px;
    color: var(--mc-gold);
    display: block;
}
.toast-desc {
    font-size: 8px;
    color: var(--mc-text);
    display: block;
    margin-top: 2px;
}

/* ============ DAILY STREAK BANNER ============ */
.streak-banner {
    position: fixed;
    top: -80px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 100;
    transition: top 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
}
.streak-banner.active {
    top: 16px;
}
.streak-content {
    background: linear-gradient(135deg, #ff6b00, #ff9500);
    border: 3px solid #FFD700;
    padding: 10px 20px;
    display: flex;
    align-items: center;
    gap: 8px;
    box-shadow: 0 4px 12px rgba(255, 107, 0, 0.4);
}
.streak-fire {
    font-size: 20px;
}
.streak-bonus {
    font-size: 9px;
    color: #FFD700;
}

/* ============ SCREEN TRANSITIONS ============ */
.screen {
    animation: screenSlideIn 0.35s cubic-bezier(0.22, 1, 0.36, 1);
}
@keyframes screenSlideIn {
    0% { opacity: 0; transform: scale(0.96) translateY(8px); }
    60% { opacity: 1; }
    100% { opacity: 1; transform: scale(1) translateY(0); }
}

/* Pixelated wipe transition overlay */
.screen-wipe {
    position: fixed;
    inset: 0;
    z-index: 999;
    pointer-events: none;
    background: var(--mc-night);
    animation: pixelWipe 0.5s steps(8) forwards;
}
@keyframes pixelWipe {
    0% { clip-path: inset(0 0 0 0); opacity: 1; }
    50% { clip-path: inset(0 0 0 0); opacity: 1; }
    100% { clip-path: inset(0 0 100% 0); opacity: 0; }
}
.screen-wipe.wipe-in {
    animation: pixelWipeIn 0.3s steps(6) forwards;
}
@keyframes pixelWipeIn {
    0% { clip-path: inset(100% 0 0 0); opacity: 0; }
    100% { clip-path: inset(0 0 0 0); opacity: 1; }
}

/* Milestone toast */
.milestone-toast {
    position: fixed;
    bottom: -80px;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(135deg, #2d6a2d, #3a8a3a);
    border: 3px solid var(--mc-gold);
    padding: 10px 20px;
    display: flex;
    align-items: center;
    gap: 10px;
    z-index: 100;
    transition: bottom 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
    box-shadow: 0 4px 16px rgba(93, 170, 58, 0.4);
    white-space: nowrap;
}
.milestone-toast.active {
    bottom: 20px;
}
.milestone-toast .milestone-icon {
    font-size: 22px;
}
.milestone-toast .milestone-text {
    font-family: 'Press Start 2P', monospace;
    font-size: 10px;
    color: var(--mc-gold);
    text-shadow: 1px 1px 0 rgba(0,0,0,0.5);
}

/* ============ HIGH CONTRAST ============ */
body.high-contrast {
    --mc-text: #ffffff;
    --mc-panel: #000000;
    --mc-panel-border: #ffffff;
    --mc-btn-gray: #333333;
}
body.high-contrast .mc-btn {
    border-width: 4px;
}
body.high-contrast .answer-btn {
    border-width: 4px;
    font-size: 18px;
}

/* ============ RESPONSIVE ============ */
/* ============ TABLET / FIRE TABLET ============ */
@media (min-width: 600px) and (max-width: 1100px) {
    .answer-btn {
        font-size: 18px;
        padding: 16px;
        min-height: 60px;
    }
    .question-word {
        font-size: 40px;
    }
    .mc-btn {
        padding: 12px 24px;
        font-size: 13px;
        min-height: 50px;
    }
    .mode-card {
        padding: 20px;
        min-height: 140px;
    }
    .mode-card h3 { font-size: 13px; }
    .mode-desc { font-size: 9px; }
    .title-buttons .mc-btn {
        min-width: 240px;
        font-size: 14px;
    }
    .topic-card {
        min-height: 50px;
        font-size: 10px;
    }
    .shop-card {
        min-height: 110px;
    }
}

@media (max-width: 600px) {
    .mode-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .game-title { font-size: 28px; }
    .question-word { font-size: 28px; }
    .answer-btn { font-size: 14px; padding: 10px; }
}

/* Landscape tablets and phones */
@media (max-height: 500px) {
    .title-buttons { flex-direction: row; flex-wrap: wrap; justify-content: center; }
    .title-buttons .mc-btn { min-width: 140px; font-size: 10px; padding: 8px 14px; }
    .mode-grid { grid-template-columns: repeat(3, 1fr); gap: 8px; }
    .mode-card { min-height: 80px; padding: 8px; }
    .question-panel {
        padding: 12px;
    }
    .question-word {
        font-size: 24px;
        min-height: 36px;
        margin-bottom: 6px;
    }
    .answer-btn {
        padding: 8px;
        min-height: 44px;
    }
}

/* Touch-friendly: ensure all interactive elements are at least 44px */
@media (pointer: coarse) {
    .mc-btn, .answer-btn, .grade-btn, .topic-tab, .mode-card, .topic-card, .shop-card, .skin-card {
        min-height: 44px;
        min-width: 44px;
    }
    .answer-btn {
        font-size: 16px;
        padding: 12px;
    }
}

/* Treasure Chest Bonus Mini-Game */
.treasure-overlay {
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0,0,0,0.88);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 50;
}
.treasure-panel {
    text-align: center;
    max-width: 320px;
    padding: 20px;
}
.treasure-chests {
    display: flex;
    gap: 16px;
    justify-content: center;
    margin: 12px 0;
}
.treasure-chest {
    font-size: 48px;
    cursor: pointer;
    transition: transform 0.2s;
    background: none;
    border: 3px solid transparent;
    border-radius: 8px;
    padding: 8px 12px;
}
.treasure-chest:hover {
    transform: scale(1.15);
    border-color: #FFD700;
}
.treasure-chest.opened {
    transform: scale(1.2);
    border-color: #FFD700;
    background: rgba(255,215,0,0.15);
}
.treasure-chest.dim {
    opacity: 0.3;
    pointer-events: none;
}
.treasure-result {
    font-size: 14px;
    color: #2ecc71;
    margin-top: 8px;
}

/* Daily Rewards Calendar */
.daily-rewards-overlay {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0,0,0,0.88);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9998;
}
.daily-rewards-panel {
    text-align: center;
    max-width: 360px;
    padding: 20px;
}
.daily-rewards-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 6px;
    margin: 12px 0;
}
.daily-reward-day {
    border: 2px solid #444;
    border-radius: 4px;
    padding: 6px 2px;
    text-align: center;
    font-size: 9px;
}
.daily-reward-day.claimed {
    border-color: #2ecc71;
    background: rgba(46,204,113,0.15);
}
.daily-reward-day.today {
    border-color: #FFD700;
    background: rgba(255,215,0,0.2);
    animation: pulse 1.5s infinite;
}
.daily-reward-day .day-num { display: block; color: #aaa; font-size: 8px; }
.daily-reward-day .day-reward { display: block; font-size: 14px; margin: 2px 0; }
.daily-reward-day .day-gems { display: block; color: #2ecc71; font-size: 8px; }

/* Speed Round HUD */
.speed-timer-bar {
    position: absolute;
    top: 0; left: 0; width: 100%; height: 4px;
    background: #333;
    z-index: 20;
}
.speed-timer-fill {
    height: 100%;
    background: #2ecc71;
    transition: width 0.1s linear;
}
.speed-timer-fill.warning { background: #f39c12; }
.speed-timer-fill.danger { background: #e94560; }

/* Leaderboard */
.leaderboard-section {
    margin-top: 8px;
    text-align: left;
}
.leaderboard-entry {
    display: flex;
    justify-content: space-between;
    padding: 3px 8px;
    font-size: 9px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}
.leaderboard-entry.current { color: #FFD700; }

/* Pet reaction animation */
@keyframes petBounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}
@keyframes petHeart {
    0% { opacity: 1; transform: translateY(0) scale(1); }
    100% { opacity: 0; transform: translateY(-20px) scale(1.5); }
}