/* =================================================================== */
/* 1. Root Variables (CSS 변수) */
/* =================================================================== */
:root {
    /* Colors */
    --color-bg-light: #f0f0f0;
    --color-bg-main: #ffffff;
    --color-text-primary: #333333;
    --color-text-secondary: #555555;
    --color-text-light: #888888;
    --color-text-inverted: #ffffff;
    --color-text-shadow: rgba(0, 0, 0, 0.5);
    --color-border: #333333;
    --color-shadow: rgba(0, 0, 0, 0.1);
    --color-shadow-dark: rgba(0, 0, 0, 0.15);
    
    /* Button Colors (Pastel) */
    --color-red-pastel: #FFB6C1;
    --color-red-pastel-dark: #FF9AA4;
    --color-red-pastel-darker: #FF7F8C;
    --color-orange-pastel: #FFDAB9;
    --color-yellow-pastel: #FFFACD;
    --color-green-pastel: #BDECB6;
    --color-green-pastel-dark: #A7D8A0;
    --color-green-pastel-darker: #92C38A;
    --color-blue-pastel: #A7C7E7;
    --color-blue-pastel-dark: #92B4D8;
    --color-blue-pastel-darker: #7D9CC9;
    --color-purple-pastel: #C3B1E1;
    
    /* Special Colors */
    --color-start-button: #4F46E5;
    --color-start-button-hover: #4338CA;
    --color-start-button-active: #3730A3;
    --color-error: #EF4444;
    --color-ability: #FBBF24; /* Amber 500 */
    --color-ability-hover: #F59E0B; /* Amber 600 */

    /* Sizing & Radius */
    --radius-large: 16px;
    --radius-medium: 12px;
    --radius-small: 8px;
}


/* =================================================================== */
/* 2. General Body & Layout */
/* =================================================================== */
body {
    font-family: 'Inter', sans-serif;
    background-color: var(--color-bg-light);
    display: flex;
    justify-content: center;
    align-items: flex-end;
    min-height: 100vh;
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    overflow: hidden;
}
.main-layout {
    display: flex;
    flex-direction: column;
    width: 100%;
    max-width: 600px;
    height: calc(100vh - 40px);
    box-sizing: border-box;
    background-color: var(--color-bg-main);
    border-radius: var(--radius-large);
    box-shadow: 0 10px 25px var(--color-shadow);
    overflow: hidden;
    padding: 0;
    transition: height 0.3s ease;
}
.game-header {
    height: 60px;
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.8rem;
    font-weight: bold;
    color: var(--color-text-primary);
    background-color: var(--color-bg-light);
    border-bottom: 2px solid var(--color-border);
    flex-shrink: 0;
    box-sizing: border-box;
}
.game-body {
    flex-grow: 1;
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 5px;
    box-sizing: border-box;
    min-height: 0;
    transition: padding 0.3s ease;
    position: relative; /* For mosaic overlay positioning */
}
.game-footer {
    height: 25%;
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start; /* 수정: center -> flex-start */
    gap: 10px;
    padding: 10px 2px 2px 2px; /* 수정: 상단 여백 추가 */
    box-sizing: border-box;
    flex-shrink: 0;
    margin-top: auto;
    overflow-y: hidden;
    transition: height 0.3s ease;
}
canvas {
    border: 2px solid var(--color-border);
    background-color: #eee;
    display: block;
    border-radius: var(--radius-small);
    touch-action: none;
}
.controls-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
    margin-top: 0;
    width: 100%;
}

/* =================================================================== */
/* 3. Control Mode Switching & Layout */
/* =================================================================== */
.main-layout.mode-keyboard .joystick-controls { display: none; }
.main-layout.mode-joystick .keyboard-controls { display: none; }
.keyboard-controls, .joystick-controls { 
    width: 100%; 
    display: flex;
    justify-content: center;
    align-items: center;
}

/* --- Keyboard Controls --- */
.main-controls-row {
    display: flex;
    align-items: center;
    justify-content: space-around;
    width: 100%;
    margin: 0 auto;
    gap: 15px;
}
.right-control-stack {
    width: 170px;
    height: 114px; /* Height of directional controls */
    display: grid;
    place-items: center;
}
.right-control-stack > div {
    grid-area: 1 / 1;
}
.directional-controls {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 5px;
    width: 170px;
    flex-shrink: 0;
}
.directional-row {
    display: flex;
    justify-content: center;
    gap: 5px;
    width: 100%;
}
.directional-row.top-row {
    justify-content: space-between;
    align-items: center;
    width: 100%;
    padding: 0 5px;
    box-sizing: border-box;
}
.directional-row.middle-row { justify-content: center; }

/* --- Joystick Controls --- */
.joystick-base {
    width: 80px;
    height: 80px;
    background-color: var(--color-bg-light);
    border-radius: 50%;
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: inset 0 5px 15px rgba(0,0,0,0.2);
}
.joystick-knob {
    width: 60px;
    height: 60px;
    background-color: var(--color-red-pastel);
    border-radius: 50%;
    position: absolute;
    cursor: grab;
    transition: transform 0.1s ease-out;
    box-shadow: 0 3px 8px rgba(0,0,0,0.3);
}
.joystick-knob:active { cursor: grabbing; }

/* =================================================================== */
/* 4. Buttons & Interactive Elements */
/* =================================================================== */

/* Base class for common button styles */
.game-button-base {
    background-color: var(--color-bg-main);
    color: #000000;
    border-radius: var(--radius-medium);
    font-weight: bold;
    cursor: pointer;
    transition: background-color 0.2s ease, transform 0.1s ease;
    box-shadow: 0 4px 6px var(--color-shadow);
    display: flex;
    justify-content: center;
    align-items: center;
    text-shadow: 1px 1px 2px var(--color-text-shadow);
    padding: 0;
}
.game-button-base:hover {
    background-color: var(--color-bg-light);
    transform: translateY(-2px);
    box-shadow: 0 6px 10px var(--color-shadow-dark);
}
.game-button-base:active {
    background-color: #D0D0D0;
    transform: translateY(0);
    box-shadow: 0 2px 4px var(--color-shadow);
}
.game-button-base:disabled {
    background-color: #cccccc;
    color: var(--color-text-light);
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

/* Specific button styles */
.arrow-button {
    width: 52px;
    height: 52px;
    font-size: 1.8rem;
}

/* Rollback Buttons */
.rollback-group {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
    width: 180px;
    height: 60px;
}
.rollback-button {
    width: 50px;
    height: 50px;
    border-radius: var(--radius-small);
    font-weight: bold;
    color: var(--color-text-inverted);
    cursor: pointer;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    transition: background-color 0.2s ease, transform 0.1s ease;
    box-shadow: 0 2px 4px var(--color-shadow);
    border: none;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.7);
    line-height: 1.1;
    padding: 4px 0;
}
.rollback-button:hover { transform: scale(1.05); }
.rollback-button:active { transform: scale(0.95); }
.rollback-button.red { background-color: var(--color-red-pastel); }
.rollback-button.blue { background-color: var(--color-blue-pastel); }
.rollback-button.green { background-color: var(--color-green-pastel); }

/* Top action buttons & Timer */
.game-info-container {
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
    margin-top: 0;
    flex-wrap: wrap; 
    font-size: 0.9rem;
}
.game-info-container .timer-display {
    font-size: 1.1rem;
    padding: 6px 12px;
}
.game-info-container .action-button,
.game-info-container .help-button {
    padding: 8px 12px;
    font-size: 0.9rem;
}
.game-info-container .reset-size-button {
    font-size: 1.2rem;
    padding: 8px 12px;
}

.timer-display {
    font-weight: bold;
    color: var(--color-text-primary);
    background-color: var(--color-bg-light);
    border-radius: var(--radius-small);
    box-shadow: inset 0 1px 3px rgba(0,0,0,0.1);
}
.action-button {
    background-color: var(--color-green-pastel);
    color: var(--color-text-inverted);
    border-radius: var(--radius-medium);
    font-weight: bold;
    cursor: pointer;
    transition: background-color 0.2s ease, transform 0.1s ease;
    box-shadow: 0 4px 6px var(--color-shadow);
    border: none;
    white-space: nowrap;
    padding: 8px 16px;
    font-size: 1.0rem;
    display: inline-flex; /* 수정: flex로 중앙 정렬 */
    align-items: center; /* 수정: 세로 중앙 정렬 */
    justify-content: center; /* 수정: 가로 중앙 정렬 */
}
.action-button:hover {
    background-color: var(--color-green-pastel-dark);
    transform: translateY(-2px);
}
.action-button:active, .action-button.active {
    background-color: var(--color-green-pastel-darker);
    transform: translateY(0);
    box-shadow: 0 2px 4px var(--color-shadow);
}
.action-button.active-blue {
    background-color: var(--color-blue-pastel);
}
.action-button.active-blue:hover {
    background-color: var(--color-blue-pastel-dark);
}
.reset-size-button { background-color: var(--color-red-pastel); }
.reset-size-button:hover { background-color: var(--color-red-pastel-dark); }
.reset-size-button:active { background-color: var(--color-red-pastel-darker); }

.help-button {
    background-color: var(--color-blue-pastel);
    color: var(--color-text-inverted);
    border-radius: var(--radius-medium);
    font-weight: bold;
    cursor: pointer;
    transition: background-color 0.2s ease, transform 0.1s ease;
    box-shadow: 0 4px 6px var(--color-shadow);
    padding: 8px 12px;
    font-size: 1.1rem;
}
.help-button:hover {
    background-color: var(--color-blue-pastel-dark);
    transform: translateY(-2px);
}
.help-button:active {
    background-color: var(--color-blue-pastel-darker);
    transform: translateY(0);
    box-shadow: 0 2px 4px var(--color-shadow);
}

/* --- 추가/수정된 스타일 --- */
.left-control-stack {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}
.abilities-row {
    display: flex;
    gap: 10px;
}
.ability-button {
    background-color: var(--color-ability);
    color: var(--color-text-inverted);
    border-radius: var(--radius-small);
    width: 50px;
    height: 50px;
    cursor: pointer;
    transition: background-color 0.2s ease, transform 0.1s ease;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    border: none;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.7);
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 4px 0;
    line-height: 1.1;
}
.ability-button:hover {
    transform: scale(1.05);
    background-color: var(--color-ability-hover);
}
.ability-button:active {
    transform: scale(0.95);
}
.ability-button:disabled {
    background-color: #cccccc;
    color: #888888;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}
.ability-button .key-char {
    font-size: 1.5rem;
    font-weight: bold;
}
.rollback-num {
    font-size: 1.2rem;
    font-weight: bold;
}
.rollback-desc {
    font-size: 0.7rem;
    font-weight: normal;
}
.placeholder-button {
    width: 50px;
    height: 50px;
    visibility: hidden;
}

.message-box {
    display: none; /* Hidden by default */
    position: absolute;
    top: 10px; /* Position it inside the footer */
    left: 50%;
    transform: translateX(-50%);
    width: calc(100% - 20px);
    padding: 10px;
    background-color: rgba(0, 0, 0, 0.75);
    color: white;
    border-radius: var(--radius-medium);
    text-align: center;
    font-size: 0.9rem;
    z-index: 100;
}

/* =================================================================== */
/* 5. Modals (Start, Win, Help, Screenshot) & Overlays */
/* =================================================================== */
.start-screen-modal {
    position: fixed; top: 0; left: 0; width: 100%; height: 100%;
    background-color: rgba(0, 0, 0, 0.6);
    display: flex; justify-content: center; align-items: center;
    z-index: 1000;
}
.start-screen-content {
    background-color: var(--color-bg-main);
    padding: 30px;
    border-radius: var(--radius-large);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    text-align: center;
    max-width: 400px; width: 90%;
    display: flex; flex-direction: column; gap: 15px;
    position: relative;
}
.home-button {
    position: absolute;
    top: 15px;
    right: 15px;
    background-color: var(--color-bg-light);
    border: none;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    font-size: 1.5rem;
    cursor: pointer;
    display: none; /* Initially hidden */
    justify-content: center;
    align-items: center;
    transition: background-color 0.2s ease, transform 0.1s ease;
}
.home-button:hover {
    background-color: #dddddd;
    transform: scale(1.1);
}
.home-button:active {
    transform: scale(1.0);
}
.start-screen-content h2 {
    font-size: 2rem; font-weight: bold;
    color: var(--color-text-primary); margin-bottom: 10px;
}
.maze-size-input-group {
    display: flex; flex-direction: column;
    gap: 10px; align-items: center;
}
.control-mode-group {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}
.control-mode-group label {
    font-size: 1.1rem; color: var(--color-text-secondary);
    font-weight: bold;
}
.maze-size-input {
    display: flex; gap: 10px;
    justify-content: center; align-items: center;
}
.maze-size-input input, .maze-size-input select, select.maze-size-input {
    width: auto;
    padding: 8px 12px;
    border: 2px solid #ccc;
    border-radius: var(--radius-small);
    font-size: 1rem;
    text-align: center;
    -moz-appearance: textfield;
}
#levelSelect {
    min-width: 180px;
    text-align: left;
    padding-left: 15px;
}
.maze-size-input input::-webkit-outer-spin-button,
.maze-size-input input::-webkit-inner-spin-button {
    -webkit-appearance: none; margin: 0;
}
.size-limit-text {
    font-size: 0.9rem; color: var(--color-text-light); margin-top: 5px;
}
.start-button {
    background-color: var(--color-start-button);
    color: var(--color-text-inverted);
    padding: 14px 28px; border-radius: var(--radius-medium);
    font-size: 1.2rem; font-weight: bold; cursor: pointer;
    transition: background-color 0.2s ease, transform 0.1s ease;
    box-shadow: 0 6px 10px var(--color-shadow-dark);
    border: none;
    white-space: nowrap;
}
.start-button:hover {
    background-color: var(--color-start-button-hover);
    transform: translateY(-3px);
}
.start-button:active {
    background-color: var(--color-start-button-active);
    transform: translateY(0);
    box-shadow: 0 2px 5px var(--color-shadow);
}
.start-button:disabled {
    background-color: #9ca3af;
    color: #e5e7eb;
    cursor: not-allowed;
    transform: none;
    box-shadow: 0 2px 5px var(--color-shadow);
}
.start-button:disabled:hover {
    background-color: #9ca3af;
    transform: none;
}
#startLobbyButton {
    font-size: 1.1rem;
}
#readyButton {
    font-size: 1.1rem;
    background-color: var(--color-green-pastel);
    padding-left: 28px;
    padding-right: 28px;
}
.start-screen-error {
    color: var(--color-error); font-size: 0.9rem;
    margin-top: -10px; display: none;
}
.setting-group {
    width: 100%;
    border: 2px solid var(--color-bg-light);
    border-radius: var(--radius-medium);
    padding: 10px;
}
.setting-group .action-button {
    background-color: var(--color-bg-light);
    color: var(--color-text-secondary);
}
.setting-group .action-button.active {
    background-color: var(--color-green-pastel-darker);
    color: var(--color-text-inverted);
}
.control-mode-button {
    background-color: var(--color-bg-light);
    color: var(--color-text-secondary);
}
.control-mode-button.active {
    background-color: var(--color-green-pastel-darker);
    color: var(--color-text-inverted);
}
.game-mode-button {
    font-size: 1.2rem;
    padding-top: 0.75rem;
    padding-bottom: 0.75rem;
}
.disabled-content {
    opacity: 0.5;
    pointer-events: none;
}
.win-modal, .help-modal, .screenshot-modal {
    position: fixed; top: 0; left: 0;
    width: 100%; height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
    display: flex; justify-content: center; align-items: center;
    z-index: 2000; display: none;
}
.win-modal-content, .help-modal-content, .screenshot-modal-content {
    background-color: var(--color-bg-main);
    padding: 30px; border-radius: var(--radius-large);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    text-align: center; max-width: 90%;
    width: 450px; display: flex; flex-direction: column;
    gap: 20px; align-items: center;
}
.win-message-line {
    font-size: 1.8rem; font-weight: bold;
    color: var(--color-text-primary); margin: 0;
    line-height: 1.2;
}
#winEmoji {
    font-size: 6rem;
    animation: bounce 1s infinite alternate;
}
@keyframes bounce {
    from { transform: translateY(0); }
    to { transform: translateY(-15px); }
}
.help-message-title { font-size: 1.8rem; font-weight: bold; color: var(--color-text-primary); }
.help-message-content { font-size: 1rem; color: var(--color-text-secondary); text-align: left; line-height: 1.5; }
.win-modal-buttons {
    display: flex; gap: 10px;
    justify-content: center; width: 100%;
    flex-wrap: wrap;
}
#winRestartButton, #shareButton, #closeHelpModalButton, #closeScreenshotModalButton, #winHomeButton {
    margin-top: 0;
    background-color: var(--color-blue-pastel);
    padding: 8px 16px;
    font-size: 1.1rem;
    border-radius: var(--radius-medium);
    flex-grow: 1;
}
#winHomeButton { background-color: var(--color-green-pastel); }
#winRestartButton:hover, #shareButton:hover, #closeHelpModalButton:hover, #closeScreenshotModalButton:hover, #winHomeButton:hover {
    background-color: var(--color-blue-pastel-dark);
}
#winHomeButton:hover { background-color: var(--color-green-pastel-dark); }
#winRestartButton:active, #shareButton:active, #closeHelpModalButton:active, #closeScreenshotModalButton:active, #winHomeButton:active {
    background-color: var(--color-blue-pastel-darker);
}
#winHomeButton:active { background-color: var(--color-green-pastel-darker); }
.screenshot-modal-content img {
    max-width: 100%; height: auto;
    border-radius: var(--radius-small);
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
}
.flash-overlay {
    position: fixed; top: 0; left: 0;
    width: 100%; height: 100%;
    background-color: white; opacity: 0;
    z-index: 3000; pointer-events: none;
}
.flash-effect { animation: flash 0.3s ease-out forwards; }
@keyframes flash {
    0% { opacity: 0; }
    50% { opacity: 1; }
    100% { opacity: 0; }
}

/* Countdown Overlay Style */
#countdownOverlay {
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
}

/* Mosaic Overlay */
.mosaic-overlay {
    position: absolute;
    top: 2px; left: 2px; right: 2px; bottom: 2px;
    z-index: 50;
    border-radius: var(--radius-small);
    background-size: 20px 20px; /* Define a size for the patterns */
}
.mosaic-pattern-1 {
    background-image: repeating-linear-gradient(45deg, 
        rgba(0,0,0,0.3) 0, 
        rgba(0,0,0,0.3) 10px, 
        rgba(255,255,255,0.3) 10px, 
        rgba(255,255,255,0.3) 20px);
}
.mosaic-pattern-2 {
    background-image: repeating-conic-gradient(
        rgba(0,0,0,0.3) 0% 25%, 
        rgba(255,255,255,0.3) 0% 50%);
}
.hidden {
    display: none !important;
}


/* Character Selection Styles */
.character-button {
    width: 30px;
    height: 30px;
    font-size: 1.4rem;
    border: 2px solid transparent;
    border-radius: var(--radius-small);
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: var(--color-bg-light);
    position: relative;
}
.character-button:hover:not(:disabled) {
    transform: scale(1.1);
    border-color: var(--color-blue-pastel);
}
.character-button.selected {
    border-color: var(--color-start-button);
    background-color: var(--color-blue-pastel);
    transform: scale(1.1);
}
.character-button.ready {
    border: 3px solid var(--color-green-pastel-darker);
}
.character-button:disabled {
    cursor: not-allowed;
    opacity: 0.4;
    text-decoration: line-through;
}
.character-button .ready-indicator {
    position: absolute;
    top: -5px;
    right: -5px;
    font-size: 1rem;
    background-color: white;
    border-radius: 50%;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 1px 3px rgba(0,0,0,0.2);
    opacity: 0;
    transition: opacity 0.2s ease;
}
.character-button.ready .ready-indicator {
    opacity: 1;
}


/* =================================================================== */
/* 6. Responsive Adjustments */
/* =================================================================== */
@media (max-width: 640px) {
    .main-layout { padding: 16px; height: 100vh; }
    .game-header { height: 50px; font-size: 1.5rem; }
    .game-footer { height: 40%; }
    .directional-controls { width: 120px; height: auto; gap: 3px; }
    .arrow-button { width: 47px; height: 47px; font-size: 1.5rem; }
    .action-button { padding: 8px 12px; font-size: 0.9rem; }
    .timer-display { font-size: 1.1rem; padding: 6px 12px; }
    .start-screen-content { padding: 20px; gap: 15px; }
    .start-screen-content h2 { font-size: 1.7rem; }
    .maze-size-input input, .maze-size-input select { width: 70px; font-size: 0.9rem; }
    .start-button { padding: 12px 24px; font-size: 1.1rem; }
    .rollback-button { width: 45px; height: 45px; }
    .rollback-num { font-size: 1rem; }
    .rollback-desc { font-size: 0.6rem; }
    .ability-button { width: 45px; height: 45px; }
    .ability-button .key-char { font-size: 1.2rem; }
    .main-controls-row { gap: 10px; }
    .rollback-group { width: 100px; height: 50px; }
    #winEmoji { font-size: 4rem; }
}