/* Base styles */
.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
    font-family: 'Arial', sans-serif;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

h1 {
    margin: 0;
    color: #2c3e50;
}

.subtitle {
    color: #7f8c8d;
    font-size: 16px;
    margin-top: 5px;
}

.other-controls {
    display: flex;
    gap: 15px;
    align-items: center;
}

.difficulty {
    display: flex;
    align-items: center;
    gap: 5px;
}

select, .new-game {
    padding: 8px 12px;
    border-radius: 4px;
    border: 1px solid #ddd;
    background: white;
    font-size: 14px;
}

.new-game {
    background-color: #3498db;
    color: white;
    border: none;
    cursor: pointer;
    transition: background-color 0.3s;
}

.new-game:hover {
    background-color: #2980b9;
}

/* Game area */
.game-area {
    background-color: #f9f9f9;
    border-radius: 8px;
    padding: 20px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.score-board {
    margin-bottom: 20px;
    text-align: center;
    margin: 0px 0px 5% 0px;
}

.big-score {
    display: flex;
    align-items: center;
    gap: 10px;
    margin: 0px 0px 10px 0px;
    font-size: 28px;
    font-weight: bold;
    color: #2c3e50;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.1);
    padding: 8px 20px;
    background: linear-gradient(135deg, #f5f7fa, #e4e7eb);
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    min-width: 400px;
    justify-content: center;
}

.time-row {
    display: flex;
    justify-content: center;
    gap: 5px;
    font-size: 18px;
}

/* Number line - matches insertion_sort style */
.number-line {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin: 30px 0;
    min-height: 100px;
}

.number-box {
    width: 60px;
    height: 60px;
    background: var(--secondary);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: bold;
    color: white;
    transition: transform 0.3s;
    position: relative;
}

/* Key element style - matches insertion_sort with pull-down animation */
.number-box.key {
    border: 3px solid gold;
    transform: scale(1.1) translateY(20px);
    box-shadow: 0 0 15px rgba(255,215,0,0.8);
    position: relative;
    transition: transform 0.4s ease-in-out;
}

.number-box.key::after {
    content: 'KEY';
    position: absolute;
    top: -25px;
    left: 50%;
    transform: translateX(-50%);
    background: gold;
    color: black;
    padding: 2px 8px;
    border-radius: 5px;
    font-size: 12px;
    font-weight: bold;
}

/* Shift animation */
@keyframes shiftRight {
    0% { transform: translateX(0); }
    100% { transform: translateX(75px); }
}

.number-box.shifting {
    animation: shiftRight 0.5s ease-in-out;
    z-index: 10;
}

/* Controls - matches bubble_sort style */
.controls {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    margin-top: -10px;
}

.core-buttons-container {
    display: flex;
    justify-content: center;
}

.core-buttons {
    display: flex;
    gap: 15px;
    margin-bottom: 20px;
}

.core-buttons button {
    padding: 12px 25px;
    font-size: 16px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s;
    font-weight: bold;
}

.shift-btn {
    background-color: #3498db;
    color: white;
}

.shift-btn:hover {
    background-color: #2980b9;
}

.insert-btn {
    background-color: #2ecc71;
    color: white;
}

.insert-btn:hover {
    background-color: #27ae60;
}

.skip-btn {
    background-color: #e67e22;
    color: white;
}

.skip-btn:hover {
    background-color: #d35400;
}

/* Tutorial */
.tutorial {
    background-color: #ecf0f1;
    padding: 15px;
    border-radius: 8px;
    margin-top: 20px;
}

.tutorial h3 {
    margin-top: 0;
    color: #2c3e50;
}

.tutorial p {
    margin: 10px 0;
}

/* Score animation - matches bubble_sort style */
.score-animation-container {
    position: relative;
    height: 40px;
    left: 5%;
}

.score-change {
    position: absolute;
    font-weight: bold;
    font-size: 24px;
    z-index: 100;
    animation: scoreChangeAnimation 1.5s ease-out;
    pointer-events: none;
    left: 50%;
    transform: translateX(-50%);
    width: 100%;
    text-align: center;
}

@keyframes scoreChangeAnimation {
    0% {
        transform: translate(-50%, -50px);
        opacity: 0.8;
    }
    50% {
        opacity: 1;
    }
    100% {
        transform: translate(-50%, 0);
        opacity: 0;
    }
}

.positive-change {
    color: #2ecc71;
}

.negative-change {
    color: #e74c3c;
}