/* ========== 开始界面 ========== */
#start-screen {
    position: absolute;
    inset: 0;
    background: #0a0a0a;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 40px;
    z-index: 30;
}
#start-screen.hidden {
    display: none;
}

.start-title {
    font-family: 'PressStart2P', monospace;
    font-size: 36px;
    color: #fff;
    letter-spacing: 4px;
    text-shadow: 0 2px 0 #333;
}

#start-btn {
    font-family: 'PressStart2P', monospace;
    font-size: 12px;
    color: #ccc;
    background: transparent;
    border: 2px solid #555;
    padding: 14px 32px;
    cursor: pointer;
    letter-spacing: 1px;
    transition: all 0.15s ease;
}
#start-btn:hover {
    color: #fff;
    border-color: #aaa;
    box-shadow: 0 0 12px rgba(255, 255, 255, 0.15);
}

/* ========== 加载界面 ========== */
#loading-screen {
    position: absolute;
    inset: 0;
    background: url('../assets/loading.png') repeat;
    display: none;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 24px;
    z-index: 30;
}
#loading-screen.visible {
    display: flex;
}

.loading-bar-wrap {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    width: 70%;
}

.loading-status {
    font-family: 'PressStart2P', monospace;
    font-size: 9px;
    color: #888;
    white-space: nowrap;
}

.loading-row {
    display: flex;
    align-items: center;
    gap: 12px;
    width: 100%;
}

.loading-bar {
    flex: 1;
    height: 4px;
    background: #333;
    position: relative;
    overflow: hidden;
}

.loading-bar-fill {
    height: 100%;
    width: 0%;
    background: #4caf50;
    transition: width 0.1s linear;
}

.loading-percent {
    font-family: 'PressStart2P', monospace;
    font-size: 10px;
    color: #aaa;
    min-width: 36px;
    text-align: right;
}