/* ===== GENERAL PAGE STYLING ===== */

/* This resets spacing and makes the page look clean */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* The whole page background and text settings */
body {
    background-color: #1a1a2e;
    color: #ffffff;
    font-family: Arial, sans-serif;
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
}

/* ===== SCREEN SYSTEM ===== */

/* Each "screen" is a section of the page. Only one is visible at a time. */
.screen {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
}

/* Hidden screens disappear completely */
.screen.hidden {
    display: none;
}

/* ===== THE TITLE ===== */

/* The title row with Pikachu on the left and Pokeball on the right */
.title-row {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
}

/* Pikachu sprite next to the title */
.title-mascot {
    width: 112.3px;
    height: 112.3px;
    object-fit: contain;
    image-rendering: pixelated;
}

/* Container for the mascot image(s) next to the title */
.mascot-container {
    display: flex;
    align-items: center;
    gap: 4px;
}

/* Pokeball image next to the title */
.title-pokeball {
    width: 80px;
    height: 80px;
    object-fit: contain;
    image-rendering: pixelated;
}

/* The big "Pokémon Chess" title at the top */
.game-title {
    font-family: Arial, sans-serif;
    font-size: 48px;
    font-weight: bold;
    color: #ffcb05;
    text-align: center;
    margin-bottom: 10px;
}

/* ===== MAIN MENU ===== */

/* Extra space below the title on the menu screen */
.menu-title {
    font-size: 61px;
    margin-bottom: 50px;
    margin-top: 60px;
}

/* The stack of menu buttons (used on mode screen) */
.menu-buttons {
    display: flex;
    flex-direction: column;
    gap: 16px;
    align-items: center;
}

/* "Choose Your Team" button at the top of the menu */
.menu-team-btn {
    margin-bottom: 40px;
}

/* "Choose Your Region" button below the fun fact */
.menu-region-btn {
    margin-top: 30px;
}

/* Player stats box on the main menu */
.stats-box {
    margin-top: 30px;
    padding: 16px 24px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 12px;
    text-align: center;
}

.stats-title {
    color: #ffcb05;
    font-size: 16px;
    font-weight: bold;
    margin-bottom: 12px;
}

.stats-row {
    display: flex;
    gap: 20px;
    justify-content: center;
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    min-width: 50px;
}

.stat-number {
    color: #ffffff;
    font-size: 22px;
    font-weight: bold;
}

.stat-label {
    color: #999999;
    font-size: 12px;
    margin-top: 2px;
}

/* Color the win/loss/draw numbers */
.stat-wins .stat-number {
    color: #4CAF50;
}

.stat-losses .stat-number {
    color: #f44336;
}

.stat-draws .stat-number {
    color: #ff9800;
}

.stat-pct .stat-number {
    color: #ffcb05;
}

/* Big "Play" button in the center */
.menu-play-btn {
    width: 300px;
    padding: 20px 0;
    font-size: 28px;
    margin-bottom: 40px;
}

/* Settings and Rules sit side by side at the bottom */
.menu-bottom-row {
    display: flex;
    gap: 24px;
    align-items: center;
}

/* The smaller side buttons (Settings, Rules) */
.menu-side-btn {
    width: 180px;
    padding: 14px 0;
    font-size: 18px;
}

/* Slanted fun fact at the bottom of the menu */
.fun-fact {
    margin-top: 50px;
    font-family: Georgia, serif;
    font-size: 31.5px;
    font-style: italic;
    color: #ffcb05;
    transform: rotate(-3deg);
    text-align: center;
    max-width: 700px;
    line-height: 1.5;
}

/* ===== TEAM SELECTION SCREEN ===== */

/* 2x3 grid of piece cards */
.team-piece-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-top: 30px;
    margin-bottom: 20px;
}

/* Each piece card shows a sprite, name, and label */
.team-piece-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 12px;
    background: rgba(255, 255, 255, 0.08);
    border: 2px solid #555;
    border-radius: 12px;
    cursor: pointer;
    width: 150px;
    transition: border-color 0.2s, background 0.2s;
}
.team-piece-card:hover {
    border-color: #ffcb05;
    background: rgba(255, 203, 5, 0.1);
}

.team-piece-sprite {
    width: 72px;
    height: 72px;
    object-fit: contain;
    image-rendering: pixelated;
}

.team-piece-name {
    color: #ffffff;
    font-size: 14px;
    margin-top: 4px;
}

.team-piece-label {
    color: #ffcb05;
    font-size: 12px;
    font-weight: bold;
    margin-top: 2px;
}

/* Row of buttons under the team grid */
.team-buttons-row {
    display: flex;
    gap: 16px;
    margin-top: 10px;
}

/* ===== POKÉMON PICKER OVERLAY ===== */

/* Full-screen dark overlay */
.picker-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.85);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
}
.picker-overlay.hidden {
    display: none;
}

/* The picker box in the center */
.picker-box {
    background-color: #16213e;
    border: 3px solid #ffcb05;
    border-radius: 16px;
    padding: 24px;
    text-align: center;
    width: 90%;
    max-width: 600px;
    max-height: 80vh;
    display: flex;
    flex-direction: column;
}

/* Picker title */
.picker-title {
    color: #ffcb05;
    font-size: 24px;
    margin: 0 0 4px 0;
}

/* Picker rule description */
.picker-rule {
    color: #aaaaaa;
    font-size: 14px;
    margin: 0 0 8px 0;
}

/* Search input */
.picker-search {
    width: 100%;
    padding: 10px;
    font-size: 18px;
    border-radius: 8px;
    border: 2px solid #ffcb05;
    background: #1a1a2e;
    color: #ffffff;
    margin-bottom: 12px;
    box-sizing: border-box;
    outline: none;
}
.picker-search:focus {
    border-color: #ffd84d;
}
.picker-search::placeholder {
    color: #666666;
}

/* Scrollable grid of Pokémon sprites */
.picker-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(70px, 1fr));
    gap: 6px;
    overflow-y: auto;
    flex: 1;
    padding: 8px;
    max-height: 400px;
}

/* Individual Pokémon option in the picker grid */
.picker-pokemon {
    width: 70px;
    height: 70px;
    cursor: pointer;
    border-radius: 8px;
    border: 2px solid transparent;
    background: rgba(255, 255, 255, 0.05);
    padding: 2px;
    transition: border-color 0.15s, background 0.15s;
}
.picker-pokemon:hover {
    border-color: #ffcb05;
    background: rgba(255, 203, 5, 0.15);
}
.picker-pokemon img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    image-rendering: pixelated;
}

/* ===== PAWN PROMOTION OVERLAY ===== */

/* Full-screen dark overlay (same pattern as picker-overlay) */
.promotion-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.85);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
}
.promotion-overlay.hidden {
    display: none;
}

/* The centered modal box */
.promotion-box {
    background-color: #16213e;
    border: 3px solid #ffcb05;
    border-radius: 16px;
    padding: 30px 40px;
    text-align: center;
}

/* "Your Pawn evolved!" title */
.promotion-title {
    color: #ffcb05;
    font-size: 28px;
    margin: 0 0 6px 0;
}

/* "Choose a new piece:" subtitle */
.promotion-subtitle {
    color: #aaaaaa;
    font-size: 16px;
    margin: 0 0 20px 0;
}

/* Row of four promotion options */
.promotion-options {
    display: flex;
    gap: 16px;
    justify-content: center;
}

/* Each clickable promotion card */
.promotion-option {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 12px;
    background: rgba(255, 255, 255, 0.08);
    border: 2px solid #555;
    border-radius: 12px;
    cursor: pointer;
    width: 100px;
    transition: border-color 0.2s, background 0.2s;
}
.promotion-option:hover {
    border-color: #ffcb05;
    background: rgba(255, 203, 5, 0.15);
}

/* The Pokemon sprite in each option */
.promotion-sprite {
    width: 72px;
    height: 72px;
    object-fit: contain;
    image-rendering: pixelated;
}

/* The piece name label below the sprite */
.promotion-label {
    color: #ffffff;
    font-size: 14px;
    font-weight: bold;
    margin-top: 6px;
}

/* ===== REGION SELECTION SCREEN ===== */

/* 3x3 grid of region buttons */
.region-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-top: 30px;
    margin-bottom: 20px;
}

/* Each region button in the grid */
.region-btn {
    width: 160px;
    padding: 18px 0;
    font-size: 20px;
}

/* ===== SETTINGS SCREEN ===== */

/* The list of settings rows */
.settings-list {
    display: flex;
    flex-direction: column;
    gap: 30px;
    margin-top: 40px;
    margin-bottom: 30px;
}

/* Each row: label on the left, toggle on the right */
.settings-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: rgba(255, 255, 255, 0.1);
    padding: 20px 30px;
    border-radius: 12px;
    min-width: 400px;
}

/* The setting name (Art Style, Sound) */
.settings-label {
    color: #ffffff;
    font-size: 22px;
    font-weight: bold;
}

/* Container for the toggle switch and its labels */
.toggle-container {
    display: flex;
    align-items: center;
    gap: 12px;
}

/* The text labels on either side of the toggle (Pixel/HD, Off/On) */
.toggle-option {
    color: #888888;
    font-size: 16px;
    font-weight: bold;
    transition: color 0.3s;
}

/* The active side lights up yellow */
.toggle-option.active {
    color: #ffcb05;
}

/* The toggle switch itself (the sliding pill shape) */
.toggle-switch {
    position: relative;
    display: inline-block;
    width: 56px;
    height: 30px;
}

/* Hide the actual checkbox (we draw our own switch) */
.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

/* The track (the pill-shaped background) */
.toggle-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #555555;
    border-radius: 30px;
    transition: background-color 0.3s;
}

/* The round knob that slides */
.toggle-slider::before {
    content: "";
    position: absolute;
    height: 24px;
    width: 24px;
    left: 3px;
    bottom: 3px;
    background-color: #ffffff;
    border-radius: 50%;
    transition: transform 0.3s;
}

/* When the toggle is ON, slide the knob to the right and change track color */
.toggle-switch input:checked + .toggle-slider {
    background-color: #ffcb05;
}

.toggle-switch input:checked + .toggle-slider::before {
    transform: translateX(26px);
}

/* Big menu buttons (Play, Settings, Rules, vs Friend, vs Computer) */
.menu-btn {
    width: 260px;
    padding: 16px 0;
    font-size: 22px;
    font-weight: bold;
    color: #1a1a2e;
    background-color: #ffcb05;
    border: none;
    border-radius: 10px;
    cursor: pointer;
}

.menu-btn:hover {
    background-color: #ffd84d;
}

/* Disabled/coming-soon buttons are grayed out */
.menu-btn.disabled {
    background-color: #555555;
    color: #888888;
    cursor: not-allowed;
}

.menu-btn.disabled:hover {
    background-color: #555555;
}

/* Back button to return to previous screen */
.back-btn {
    margin-top: 24px;
    padding: 10px 28px;
    font-size: 16px;
    font-weight: bold;
    color: #cccccc;
    background-color: transparent;
    border: 2px solid #cccccc;
    border-radius: 8px;
    cursor: pointer;
}

.back-btn:hover {
    color: #ffffff;
    border-color: #ffffff;
}

/* ===== RULES SCREEN ===== */

/* The scrollable rules content area */
.rules-content {
    max-width: 620px;
    max-height: 500px;
    overflow-y: auto;
    padding: 20px;
    margin-top: 10px;
}

/* Each section (How Chess Works, Pokémon Piece Rules) */
.rules-section {
    margin-bottom: 30px;
}

/* Section headings */
.rules-heading {
    font-size: 24px;
    color: #ffcb05;
    margin-bottom: 10px;
}

/* Sub-headings within a section */
.rules-subheading {
    font-size: 18px;
    color: #ffcb05;
    margin-top: 16px;
    margin-bottom: 8px;
}

/* Regular text in the rules */
.rules-text {
    font-size: 15px;
    line-height: 1.6;
    color: #dddddd;
    margin-bottom: 10px;
}

/* Tables in the rules */
.rules-table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 12px;
}

.rules-table th {
    text-align: left;
    padding: 8px 12px;
    background-color: #3b5ca8;
    color: #ffffff;
    font-size: 14px;
}

.rules-table td {
    padding: 8px 12px;
    border-bottom: 1px solid #333355;
    font-size: 14px;
    color: #dddddd;
}

.rules-table tr:nth-child(even) td {
    background-color: rgba(255, 255, 255, 0.05);
}

/* Bullet lists in the rules */
.rules-list {
    padding-left: 20px;
    font-size: 14px;
    line-height: 1.8;
    color: #dddddd;
}

/* ===== TURN INDICATOR ===== */

/* Shows whose turn it is */
.turn-indicator {
    font-size: 20px;
    font-weight: bold;
    padding: 8px 24px;
    border-radius: 8px;
    margin-bottom: 15px;
}

/* White's turn styling */
.turn-white {
    background-color: #f0d9b5;
    color: #333333;
}

/* Black's turn styling */
.turn-black {
    background-color: #333333;
    color: #f0d9b5;
    border: 2px solid #f0d9b5;
}

/* ===== THE CHESS BOARD ===== */

/* Container that holds the column labels and the board */
.board-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
}

/* Column letters (a-h) along the top */
.column-labels {
    display: flex;
    align-items: center;
}

/* Empty space in the corner above the row numbers */
.label-spacer {
    width: 30px;
}

/* Each column letter */
.col-label {
    width: 70px;
    text-align: center;
    font-size: 16px;
    font-weight: bold;
    color: #cccccc;
    padding-bottom: 5px;
}

/* The board and row numbers side by side */
.board-with-rows {
    display: flex;
    align-items: flex-start;
}

/* Row numbers (1-8) along the left side */
.row-labels {
    display: flex;
    flex-direction: column;
}

/* Each row number */
.row-label {
    width: 30px;
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    font-weight: bold;
    color: #cccccc;
}

/* The 8x8 grid of squares */
#board {
    display: grid;
    grid-template-columns: repeat(8, 70px);
    grid-template-rows: repeat(8, 70px);
    border: 3px solid #ffcb05;
    border-radius: 4px;
}

/* ===== SQUARE COLORS ===== */

/* Each square on the board */
.square {
    width: 70px;
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: center;
    /* Hide any part of the image that goes outside the square */
    overflow: hidden;
    /* Make the cursor a pointer (hand) when hovering */
    cursor: pointer;
    /* Needed so we can position things inside the square */
    position: relative;
}

/* During a move animation, let the piece slide out of its square */
.square.animating {
    overflow: visible;
    z-index: 10;
}

/* Light squares (cream/tan color) */
.square.light {
    background-color: #f0d9b5;
}

/* Dark squares (brown/green color) */
.square.dark {
    background-color: #b58863;
}

/* ===== SELECTED SQUARE ===== */

/* When you click a Pokémon, its square gets highlighted */
.square.selected {
    background-color: #f7ec5a !important;
    box-shadow: inset 0 0 0 3px #d4a017;
}

/* ===== VALID MOVE HIGHLIGHTS ===== */

/* Empty squares where the piece can move show a dot */
.square.valid-move::after {
    content: "";
    width: 20px;
    height: 20px;
    background-color: rgba(0, 0, 0, 0.25);
    border-radius: 50%;
    position: absolute;
    /* Only show the dot if there's no piece on this square */
    pointer-events: none;
}

/* Squares with an opponent's piece that can be captured get a ring */
.square.valid-move .piece-image {
    border-radius: 50%;
    box-shadow: 0 0 0 4px rgba(255, 0, 0, 0.6);
}

/* ===== POKÉMON PIECE IMAGES ===== */

/* The Pokémon image inside each square */
/* We make the image bigger than the square so small sprites like
   Pikachu and Jolteon (which have lots of empty space in the file)
   look full-sized on the board. The overflow is hidden by the square. */
.piece-image {
    width: 90px;
    height: 90px;
    object-fit: contain;
    /* Disable dragging so images don't get dragged around */
    -webkit-user-drag: none;
    user-select: none;
}

/* ===== TEAM COLOR BAR ===== */

/* A small bar under each Pokémon so you can tell White from Black */
.team-bar {
    position: absolute;
    bottom: 2px;
    left: 50%;
    transform: translateX(-50%);
    width: 30px;
    height: 5px;
    border-radius: 3px;
}

/* White team gets a white bar */
.team-bar.white-team {
    background-color: #ffffff;
    border: 1px solid #aaaaaa;
}

/* Black team gets a dark bar */
.team-bar.black-team {
    background-color: #333333;
    border: 1px solid #666666;
}

/* ===== CHECK HIGHLIGHT ===== */

/* When a King is in check, its square glows red */
.square.in-check {
    background-color: #ff4444 !important;
    box-shadow: inset 0 0 12px rgba(255, 0, 0, 0.8);
}

/* ===== INFO PANEL ===== */

/* The panel below the board that shows selected Pokémon info */
.info-panel {
    margin-top: 15px;
    padding: 12px 24px;
    background-color: #16213e;
    border: 2px solid #ffcb05;
    border-radius: 10px;
    display: flex;
    gap: 20px;
    align-items: center;
    min-height: 50px;
    min-width: 300px;
    justify-content: center;
}

/* The hint text when nothing is selected */
.info-hint {
    color: #888888;
    font-style: italic;
    font-size: 14px;
}

/* Pokémon name in the info panel */
.info-name {
    font-size: 20px;
    font-weight: bold;
    color: #ffcb05;
}

/* Pokédex number in the info panel */
.info-dex {
    font-size: 18px;
    color: #aaaaaa;
}

/* Chess piece role in the info panel */
.info-piece {
    font-size: 18px;
    color: #ffffff;
    background-color: #3b5ca8;
    padding: 4px 12px;
    border-radius: 6px;
}

/* Row of buttons below the game board (Main Menu + Save & Quit) */
.game-buttons-row {
    display: flex;
    gap: 16px;
    margin-top: 15px;
}

/* Continue button on the main menu (green to stand out) */
.menu-continue-btn {
    background-color: #4CAF50;
    color: #ffffff;
}

.menu-continue-btn:hover {
    background-color: #5CBF60;
}

.menu-continue-btn.hidden {
    display: none;
}

/* ===== NEW GAME BUTTON ===== */

.new-game-btn {
    margin-top: 0;
    padding: 10px 28px;
    font-size: 18px;
    font-weight: bold;
    color: #1a1a2e;
    background-color: #ffcb05;
    border: none;
    border-radius: 8px;
    cursor: pointer;
}

.new-game-btn:hover {
    background-color: #ffd84d;
}

.new-game-btn.hidden {
    display: none;
}

/* ===== GAME OVER POPUP ===== */

/* The dark overlay that covers the whole screen */
.game-over-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
}

/* Hide the popup until the game ends */
.game-over-overlay.hidden {
    display: none;
}

/* The popup box in the center */
.game-over-box {
    background-color: #16213e;
    border: 3px solid #ffcb05;
    border-radius: 16px;
    padding: 40px 50px;
    text-align: center;
}

/* "Checkmate!" or "Stalemate!" title */
.game-over-title {
    font-size: 36px;
    font-weight: bold;
    color: #ffcb05;
    margin-bottom: 12px;
}

/* "White wins!" or "It's a draw!" message */
.game-over-message {
    font-size: 22px;
    color: #ffffff;
    margin-bottom: 24px;
}

/* Buttons row in the game over popup */
.game-over-buttons {
    display: flex;
    gap: 12px;
    justify-content: center;
}

/* ===== REVIEW CONTROLS ===== */

/* The bar with forward/back buttons for reviewing the game */
.review-controls {
    margin-top: 15px;
    padding: 10px 16px;
    background-color: #16213e;
    border: 2px solid #ffcb05;
    border-radius: 10px;
    display: flex;
    gap: 8px;
    align-items: center;
    justify-content: center;
}

/* Hide review controls until review mode starts */
.review-controls.hidden {
    display: none;
}

/* Each arrow button in the review bar */
.review-btn {
    padding: 8px 14px;
    font-size: 16px;
    font-weight: bold;
    color: #1a1a2e;
    background-color: #ffcb05;
    border: none;
    border-radius: 6px;
    cursor: pointer;
}

.review-btn:hover {
    background-color: #ffd84d;
}

/* Dim the button when it can't be clicked */
.review-btn:disabled {
    background-color: #555555;
    color: #888888;
    cursor: not-allowed;
}

/* The "Exit Review" button stands out a bit differently */
.review-exit-btn {
    margin-left: 12px;
    background-color: #e05555;
    color: #ffffff;
}

.review-exit-btn:hover {
    background-color: #ff6b6b;
}

/* The "Move 3 / 12" counter text */
.review-counter {
    font-size: 14px;
    color: #cccccc;
    min-width: 100px;
    text-align: center;
}

/* ===== DIFFICULTY BUTTONS ===== */

/* Easy = green */
.diff-easy {
    background-color: #4CAF50;
    color: #ffffff;
}
.diff-easy:hover {
    background-color: #5CBF60;
}

/* Medium = orange */
.diff-medium {
    background-color: #ff9800;
    color: #ffffff;
}
.diff-medium:hover {
    background-color: #ffad33;
}

/* Hard = red */
.diff-hard {
    background-color: #f44336;
    color: #ffffff;
}
.diff-hard:hover {
    background-color: #ff6659;
}

/* ===== THINKING ANIMATION ===== */

/* Pulsing effect when the computer is "thinking" */
@keyframes thinking-pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

.thinking {
    animation: thinking-pulse 1.2s ease-in-out infinite;
}

/* ===== VERSION LABEL ===== */

/* Small version number pinned to the bottom left corner */
.version-label {
    position: fixed;
    bottom: 10px;
    left: 14px;
    font-size: 13px;
    color: #666666;
}